component
CH554T
Public Made by Adomby adom
WCH(Jiangsu Qin Heng) Microcontroller Units (MCUs/MPUs/SOCs), TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973
{
"schema_version": 1,
"type": "component",
"slug": "ch554t",
"title": "CH554T",
"brief": "WCH(Jiangsu Qin Heng) Microcontroller Units (MCUs/MPUs/SOCs), TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
"tags": [
"component",
"single chip microcomputer-microcontroller",
"ch554t",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "CH554T",
"manufacturer": "WCH(Jiangsu Qin Heng)",
"package": "TSSOP-20",
"pin_count": 20,
"category": "Single Chip Microcomputer/Microcontroller",
"subcategory": "Microcontroller Units (MCUs/MPUs/SOCs)",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/00dfbe129dbe176fbe2bcbec3fbe9ded.pdf",
"parts": {
"symbol": "ch554t.kicad_sym",
"footprint": "ch554t.kicad_mod",
"model_3d": "ch554t-hero.glb",
"model_3d_plain": "ch554t-etched.glb",
"model_3d_step": "ch554t-etched.step",
"model_3d_step_plain": "ch554t.step",
"lbr": "ch554t.lbr"
},
"distributor_links": {
"lcsc": "C2928938"
},
"distributor_check": {
"checked_at": "2026-10-23T03:00:07Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": null,
"status": "no match"
}
},
"pins": [
{
"number": "1",
"name": "P3.2",
"type": "bidirectional",
"description": "GPIO P3.2 with alternate functions TXD1_ (UART1 TX remap), INT0 (external interrupt 0), VBUS1 (USB type-C bus voltage detect) and AIN3 (ADC channel 3)."
},
{
"number": "2",
"name": "P1.4",
"type": "bidirectional",
"description": "GPIO P1.4 with alternate functions T2_/CAP1_, SCS (SPI0 chip select), TIN2 (touch key), UCC1 (USB type-C config channel) and AIN1 (ADC channel 1); also used for in-circuit programming chip select."
},
{
"number": "3",
"name": "P1.5",
"type": "bidirectional",
"description": "GPIO P1.5 with alternate functions MOSI (SPI0), PWM1 output, TIN3 (touch key), UCC2 (USB type-C config channel) and AIN2 (ADC channel 2)."
},
{
"number": "4",
"name": "P1.6",
"type": "bidirectional",
"description": "GPIO P1.6 with alternate functions MISO (SPI0), RXD1 (UART1 receive) and TIN4 (touch key); also used as programming data output."
},
{
"number": "5",
"name": "P1.7",
"type": "bidirectional",
"description": "GPIO P1.7 with alternate functions SCK (SPI0 clock), TXD1 (UART1 transmit) and TIN5 (touch key); also used as programming clock input."
},
{
"number": "6",
"name": "RST",
"type": "input",
"description": "External reset input (active high) with built-in pull-down resistor; also T2EX_/CAP2_ alternate function."
},
{
"number": "7",
"name": "P1.0",
"type": "bidirectional",
"description": "GPIO P1.0 with alternate functions T2 (Timer2 external count/clock output), CAP1 (capture input 1) and TIN0 (touch key)."
},
{
"number": "8",
"name": "P1.1",
"type": "bidirectional",
"description": "GPIO P1.1 with alternate functions T2EX (Timer2 reload/capture input), CAP2, TIN1 (touch key), VBUS2 (USB type-C bus voltage detect) and AIN0 (ADC channel 0)."
},
{
"number": "9",
"name": "P3.1",
"type": "bidirectional",
"description": "GPIO P3.1 with alternate functions PWM2_ (PWM2 remap) and TXD (UART0 transmit)."
},
{
"number": "10",
"name": "P3.0",
"type": "bidirectional",
"description": "GPIO P3.0 with alternate functions PWM1_ (PWM1 remap) and RXD (UART0 receive)."
},
{
"number": "11",
"name": "P3.3",
"type": "bidirectional",
"description": "GPIO P3.3 with alternate function INT1 (external interrupt 1 input)."
},
{
"number": "12",
"name": "P3.4",
"type": "bidirectional",
"description": "GPIO P3.4 with alternate functions PWM2 output, RXD1_ (UART1 receive remap) and T0 (Timer0 external input)."
},
{
"number": "13",
"name": "P3.5",
"type": "bidirectional",
"description": "GPIO P3.5 with alternate function T1 (Timer1 external input)."
},
{
"number": "14",
"name": "P3.6",
"type": "bidirectional",
"description": "GPIO P3.6 or USB UDP (D+) signal; powered from V33 so high level only reaches V33 and 5V is not supported; no series resistor when used for USB."
},
{
"number": "15",
"name": "P3.7",
"type": "bidirectional",
"description": "GPIO P3.7 or USB UDM (D-) signal; powered from V33 so high level only reaches V33 and 5V is not supported; no series resistor when used for USB."
},
{
"number": "16",
"name": "P1.3",
"type": "bidirectional",
"description": "GPIO P1.3 with alternate functions XO (external crystal inverting output) and TXD_ (UART0 transmit remap)."
},
{
"number": "17",
"name": "P1.2",
"type": "bidirectional",
"description": "GPIO P1.2 with alternate functions XI (external crystal oscillator input) and RXD_ (UART0 receive remap)."
},
{
"number": "18",
"name": "GND",
"type": "power_in",
"description": "Common ground (VSS)."
},
{
"number": "19",
"name": "VCC",
"type": "power_in",
"description": "Power supply input (3V to 5V range supported); requires an external 0.1uF decoupling capacitor."
},
{
"number": "20",
"name": "V33",
"type": "power_out",
"description": "Internal USB regulator output and internal 3.3V supply input; connect to VCC when supply is below 3.6V, otherwise add an external 0.1uF decoupling capacitor."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-sonnet-5-5",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: V33 is both the LDO output and a supply input (tied to VCC at 3.3V); type power_out chosen, could be"
],
"pages_sent": 51,
"cost_usd": 0.5718,
"at": "2026-10-23T02:59:38"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/00dfbe129dbe176fbe2bcbec3fbe9ded.pdf",
"pages": 57,
"sha256": "37b210d9d54d43d6",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 20,
"described": 20,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "ch554t.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
6.4,
6.5,
1.2
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "97339947f3a7196470ec2f1d9f9b92bb2fc2ab66ad53be0cf105192585ef3c9a",
"checked": "2026-10-23",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "ch554t-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
6.4,
6.5,
1.2
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "577a0c42220d0c798897ffa18f323c025600f57440f6ef2654ca9bc8fd8752f1",
"checked": "2026-10-23",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "WCH(Jiangsu Qin Heng)",
"Package": "TSSOP-20",
"Category": "Single Chip Microcomputer/Microcontroller",
"Pins": "20"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "37b210d9d54d43d65e91fb007469ce8f659e38b8075df521965c66111bf68c47",
"rows": [
{
"name": "Operating ambient temperature",
"symbol": "TA",
"kind": "absolute_maximum",
"unit": "℃",
"min": -40,
"typ": null,
"max": 85,
"conditions": "",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Storage temperature",
"symbol": "TS",
"kind": "absolute_maximum",
"unit": "℃",
"min": -55,
"typ": null,
"max": 125,
"conditions": "",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Supply voltage",
"symbol": "VCC",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.4,
"typ": null,
"max": 5.8,
"conditions": "VCC to power, GND to ground",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Voltage on I/O pins other than P3.6/P3.7 (max VCC+0.4)",
"symbol": "VIO",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.4,
"typ": null,
"max": null,
"conditions": "max printed as VCC+0.4",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Voltage on P3.6/P3.7 (max V33+0.4)",
"symbol": "VIOU",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.4,
"typ": null,
"max": null,
"conditions": "max printed as V33+0.4",
"source_page": 53,
"source": "datasheet"
},
{
"name": "VCC supply voltage (5V)",
"symbol": "VCC5",
"kind": "electrical",
"unit": "V",
"min": 3.7,
"typ": 5,
"max": 5.5,
"conditions": "V33 external capacitor only; TA=25℃, Fsys=6MHz",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Internal USB regulator output voltage",
"symbol": "V33",
"kind": "electrical",
"unit": "V",
"min": 3.14,
"typ": 3.27,
"max": 3.4,
"conditions": "VCC=5V, TA=25℃, Fsys=6MHz",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Supply current at Fsys=24MHz",
"symbol": "ICC24M5",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 8,
"max": 11,
"conditions": "Fsys=24MHz; VCC=5V, TA=25℃",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Supply current at Fsys=6MHz",
"symbol": "ICC6M5",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 4,
"max": 6,
"conditions": "Fsys=6MHz; VCC=5V, TA=25℃",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Supply current at Fsys=750KHz",
"symbol": "ICC750K5",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 2,
"max": 3,
"conditions": "Fsys=750KHz; VCC=5V, TA=25℃",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Sleep supply current",
"symbol": "ISLP5",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 0.1,
"max": 0.2,
"conditions": "After sleep; VCC=5V, TA=25℃",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Full sleep supply current",
"symbol": "ISLP5L",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 0.008,
"max": 0.025,
"conditions": "VCC=V33=5V, external crystal clock, bLDO3V3_OFF=1 (LDO off), full sleep",
"source_page": 53,
"source": "datasheet"
},
{
"name": "ADC module operating current",
"symbol": "IADC5",
"kind": "electrical",
"unit": "uA",
"min": null,
"typ": 200,
"max": 800,
"conditions": "VCC=5V, TA=25℃",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Comparator module operating current",
"symbol": "ICMP5",
"kind": "electrical",
"unit": "uA",
"min": null,
"typ": 100,
"max": 500,
"conditions": "VCC=5V, TA=25℃",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Touch-key module operating current",
"symbol": "ITKEY5",
"kind": "electrical",
"unit": "uA",
"min": null,
"typ": 150,
"max": 250,
"conditions": "VCC=5V, TA=25℃",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Input low voltage",
"symbol": "VIL5",
"kind": "electrical",
"unit": "V",
"min": -0.4,
"typ": null,
"max": 1.2,
"conditions": "VCC=5V",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Input high voltage (max VCC+0.4)",
"symbol": "VIH5",
"kind": "electrical",
"unit": "V",
"min": 2.4,
"typ": null,
"max": null,
"conditions": "VCC=5V; max printed as VCC+0.4",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Output low voltage",
"symbol": "VOL5",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.4,
"conditions": "12mA sink current; VCC=5V",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Input current, no pull-up",
"symbol": "IIN",
"kind": "electrical",
"unit": "uA",
"min": -5,
"typ": 0,
"max": 5,
"conditions": "Input without pull-up",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Input current with pull-down",
"symbol": "IDN5",
"kind": "electrical",
"unit": "uA",
"min": -35,
"typ": -70,
"max": -140,
"conditions": "Input with pull-down resistor; VCC=5V",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Input current with pull-up",
"symbol": "IUP5",
"kind": "electrical",
"unit": "uA",
"min": 35,
"typ": 70,
"max": 140,
"conditions": "Input with pull-up resistor; VCC=5V",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Input current with pull-up, low-to-high transition",
"symbol": "IUP5X",
"kind": "electrical",
"unit": "uA",
"min": 250,
"typ": 400,
"max": 600,
"conditions": "Pull-up input, low to high transition; VCC=5V",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Power-on reset threshold voltage",
"symbol": "Vpot",
"kind": "electrical",
"unit": "V",
"min": 2.1,
"typ": 2.3,
"max": 2.5,
"conditions": "VCC=5V",
"source_page": 53,
"source": "datasheet"
},
{
"name": "VCC supply voltage (3.3V, USB on)",
"symbol": "VCC3",
"kind": "electrical",
"unit": "V",
"min": 3,
"typ": 3.3,
"max": 3.6,
"conditions": "V33 shorted to VCC, USB enabled",
"source_page": 53,
"source": "datasheet"
},
{
"name": "VCC supply voltage (3.3V, USB off)",
"symbol": "VCC3",
"kind": "electrical",
"unit": "V",
"min": 2.7,
"typ": 3.3,
"max": 3.6,
"conditions": "V33 shorted to VCC, USB disabled",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Supply current at Fsys=16MHz",
"symbol": "ICC16M3",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 4,
"max": 6,
"conditions": "Fsys=16MHz; VCC=V33=3.3V, TA=25℃",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Supply current at Fsys=6MHz",
"symbol": "ICC6M3",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 2,
"max": 4,
"conditions": "Fsys=6MHz; VCC=V33=3.3V, TA=25℃",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Supply current at Fsys=750KHz",
"symbol": "ICC750K3",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 1,
"max": 2,
"conditions": "Fsys=750KHz; VCC=V33=3.3V, TA=25℃",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Sleep supply current",
"symbol": "ISLP3",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 0.07,
"max": 0.15,
"conditions": "After sleep; VCC=V33=3.3V, TA=25℃",
"source_page": 53,
"source": "datasheet"
},
{
"name": "Full sleep supply current",
"symbol": "ISLP3L",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 0.004,
"max": 0.015,
"conditions": "bLDO3V3_OFF=1 (LDO off), full sleep",
"source_page": 54,
"source": "datasheet"
},
{
"name": "ADC module operating current",
"symbol": "IADC3",
"kind": "electrical",
"unit": "uA",
"min": null,
"typ": 150,
"max": 500,
"conditions": "VCC=V33=3.3V, TA=25℃",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Comparator module operating current",
"symbol": "ICMP3",
"kind": "electrical",
"unit": "uA",
"min": null,
"typ": 70,
"max": 300,
"conditions": "VCC=V33=3.3V, TA=25℃",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Touch-key module operating current",
"symbol": "ITKEY3",
"kind": "electrical",
"unit": "uA",
"min": null,
"typ": 130,
"max": 200,
"conditions": "VCC=V33=3.3V, TA=25℃",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Input low voltage",
"symbol": "VIL3",
"kind": "electrical",
"unit": "V",
"min": -0.4,
"typ": null,
"max": 0.8,
"conditions": "VCC=V33=3.3V",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Input high voltage (max VCC+0.4)",
"symbol": "VIH3",
"kind": "electrical",
"unit": "V",
"min": 1.9,
"typ": null,
"max": null,
"conditions": "VCC=V33=3.3V; max printed as VCC+0.4",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Output low voltage",
"symbol": "VOL3",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.4,
"conditions": "8mA sink current; VCC=V33=3.3V",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Input current, no pull-up",
"symbol": "IIN",
"kind": "electrical",
"unit": "uA",
"min": -5,
"typ": 0,
"max": 5,
"conditions": "Input without pull-up; VCC=V33=3.3V",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Input current with pull-down",
"symbol": "IDN3",
"kind": "electrical",
"unit": "uA",
"min": -15,
"typ": -30,
"max": -60,
"conditions": "Input with pull-down resistor; VCC=V33=3.3V",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Input current with pull-up",
"symbol": "IUP3",
"kind": "electrical",
"unit": "uA",
"min": 15,
"typ": 30,
"max": 60,
"conditions": "Input with pull-up resistor; VCC=V33=3.3V",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Input current with pull-up, low-to-high transition",
"symbol": "IUP3X",
"kind": "electrical",
"unit": "uA",
"min": 100,
"typ": 170,
"max": 250,
"conditions": "Pull-up input, low to high transition; VCC=V33=3.3V",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Power-on reset threshold voltage",
"symbol": "Vpot",
"kind": "electrical",
"unit": "V",
"min": 2.1,
"typ": 2.3,
"max": 2.5,
"conditions": "VCC=V33=3.3V",
"source_page": 54,
"source": "datasheet"
},
{
"name": "External crystal / XI clock frequency",
"symbol": "Fxt",
"kind": "timing",
"unit": "MHz",
"min": 6,
"typ": 24,
"max": 25,
"conditions": "",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Calibrated internal clock frequency",
"symbol": "Fosc",
"kind": "timing",
"unit": "MHz",
"min": 23.52,
"typ": 24,
"max": 24.48,
"conditions": "V33=3V~3.6V",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Calibrated internal clock frequency",
"symbol": "Fosc28",
"kind": "timing",
"unit": "MHz",
"min": 23.2,
"typ": 24,
"max": 24.72,
"conditions": "V33=2.8V~3V",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Calibrated internal clock frequency",
"symbol": "Fosc27",
"kind": "timing",
"unit": "MHz",
"min": 21,
"typ": 24,
"max": 25,
"conditions": "V33=2.7V",
"source_page": 54,
"source": "datasheet"
},
{
"name": "PLL frequency",
"symbol": "Fpll",
"kind": "timing",
"unit": "MHz",
"min": 24,
"typ": 96,
"max": 100,
"conditions": "",
"source_page": 54,
"source": "datasheet"
},
{
"name": "USB sampling clock, host",
"symbol": "Fusb4x",
"kind": "timing",
"unit": "MHz",
"min": 47.98,
"typ": 48,
"max": 48.02,
"conditions": "Using USB host function",
"source_page": 54,
"source": "datasheet"
},
{
"name": "USB sampling clock, device",
"symbol": "Fusb4x",
"kind": "timing",
"unit": "MHz",
"min": 47.04,
"typ": 48,
"max": 48.96,
"conditions": "Using USB device function",
"source_page": 54,
"source": "datasheet"
},
{
"name": "System clock frequency",
"symbol": "Fsys",
"kind": "timing",
"unit": "MHz",
"min": 0.1,
"typ": 6,
"max": 24,
"conditions": "VCC>=4.4V",
"source_page": 54,
"source": "datasheet"
},
{
"name": "System clock frequency",
"symbol": "Fsys",
"kind": "timing",
"unit": "MHz",
"min": 0.1,
"typ": 6,
"max": 16,
"conditions": "4.4V>VCC>=3.3V",
"source_page": 54,
"source": "datasheet"
},
{
"name": "System clock frequency",
"symbol": "Fsys",
"kind": "timing",
"unit": "MHz",
"min": 0.1,
"typ": 6,
"max": 12,
"conditions": "VCC<3.3V",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Power-on reset delay",
"symbol": "Tpor",
"kind": "timing",
"unit": "mS",
"min": 9,
"typ": 11,
"max": 15,
"conditions": "",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Hot reset delay",
"symbol": "Trdl",
"kind": "timing",
"unit": "uS",
"min": 30,
"typ": 45,
"max": 60,
"conditions": "",
"source_page": 54,
"source": "datasheet"
},
{
"name": "USB auto-suspend detect time, host mode",
"symbol": "Tusp",
"kind": "timing",
"unit": "mS",
"min": 2,
"typ": 3,
"max": 4,
"conditions": "USB host mode",
"source_page": 54,
"source": "datasheet"
},
{
"name": "USB auto-suspend detect time, device mode",
"symbol": "Tusp",
"kind": "timing",
"unit": "mS",
"min": 4,
"typ": 5,
"max": 6,
"conditions": "USB device mode",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Wake-up completion time after sleep",
"symbol": "Twak",
"kind": "timing",
"unit": "uS",
"min": 1,
"typ": 2,
"max": 10,
"conditions": "",
"source_page": 54,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"ch554t"
],
"discovery_pitch": "CH554T (WCH(Jiangsu Qin Heng)) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"ch554t.kicad_sym",
"ch554t.kicad_mod",
"ch554t.glb",
"ch554t.step",
"ch554t.lbr",
"docs/hero.png",
"docs/ch554t-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"ch554t-hero.glb",
"ch554t-hero.overlay.json",
"ch554t-etched.glb"
],
"visibility": {
"public": true
}
}