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CJ4054A420M
Public Made by Adomby adom
Changjing Pre-ordered transistors, SOT-23-5L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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{
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"slug": "cj4054a420m",
"title": "CJ4054A420M",
"brief": "Changjing Pre-ordered transistors, SOT-23-5L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
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"extractor-text"
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"manufacturer": "Changjing",
"package": "SOT-23-5L",
"pin_count": 5,
"category": "Triode/MOS Tube/Transistor",
"subcategory": "Pre-ordered transistors",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/4e7c19e0e170c8ebc5fdb4e64990224e.pdf",
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"source": "Component Ocean /api/assign-pns",
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{
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"type": "power_in",
"description": "Ground terminal."
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{
"number": "3",
"name": "BAT",
"type": "bidirectional",
"description": "Charger power stage current output and battery voltage sense input that regulates the final float voltage (4.20V for CJ4054A420M) and should be bypassed to GND with a 10µF to 47µF capacitor, drawing less than 2µA in shutdown or sleep mode."
},
{
"number": "4",
"name": "VCC",
"type": "power_in",
"description": "Charger positive input supply, specified from 4.5V to 6.5V and to be bypassed with at least a 4.7µF capacitor, which enters low-power sleep mode when VCC drops to within 80mV of the BAT voltage."
},
{
"number": "5",
"name": "PROG",
"type": "output",
"description": "Charge current program, charge current monitor and shutdown pin, programmed by a 1% RPROG resistor to GND (regulated to 1V in constant-current mode and 0.1V in pre-conditioning), with a 1.21V shutdown threshold and an approximately 2.4V clamp."
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],
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"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The SOT-23-5L pin numbers were read from the first numeric column of Table 1 (SOT-23-5L column, whic; The extracted text drops the micro symbol (µ) in several places, so the BAT shutdown/sleep leakage i; The datasheet classifies BAT as I/O and PROG as O; these were mapped to KiCad 'bidirectional' and 'o"
],
"pages_sent": 13,
"cost_usd": 0.004,
"at": "2026-11-12T17:56:04"
},
"datasheet": {
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"standoff_mm": 0.05,
"standoff_basis": "family nominal (no datasheet A1 read)",
"lead_width_mm": 0.36,
"lead_width_basis": "default: 0.6 x pad width across the lead, at most 0.45 x pitch 0.95 mm; a tab 0.9 x its width (no datasheet b read)",
"lead_thickness_mm": 0.172,
"lead_thickness_basis": "default for pitch 0.95 mm, height 1.15 mm (no datasheet c read)"
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"pins": {
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"described": 5,
"cites_pages": true,
"refuses_to_fabricate": true
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"package_dims": {
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"source_page": 31,
"D": {
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null
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"source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
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"verdict": "PASS",
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"metadata": {
"specs": {
"Manufacturer": "Changjing",
"Package": "SOT-23-5L",
"Category": "Triode/MOS Tube/Transistor",
"Pins": "5"
},
"appearance": {
"contacts": {
"quote": "die to the copper lead frame, through the package leads, (especially the ground lead) to the PC board",
"page": 16,
"doc": "ds.pdf",
"material": "copper"
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"version": 1,
"datasheet_sha256": "96f60dc73e5facbce22dd480d0cd5f9c1491cf7e9741ee625c5ee382e7172ceb"
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"rows": [
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"name": "Input Supply Voltage",
"symbol": "VCC",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 10,
"conditions": "All voltages with respect to network ground",
"source_page": 4,
"source": "datasheet"
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{
"name": "PROG Pin Voltage",
"symbol": "",
"kind": "absolute_maximum",
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"min": -0.3,
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"conditions": "",
"source_page": 4,
"source": "datasheet"
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{
"name": "CHRG Pin Voltage",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
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"conditions": "",
"source_page": 4,
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{
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"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
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"conditions": "",
"source_page": 4,
"source": "datasheet"
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{
"name": "Output sink current",
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"unit": "mA",
"min": null,
"typ": null,
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"conditions": "",
"source_page": 4,
"source": "datasheet"
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{
"name": "Power dissipation",
"symbol": "PD",
"kind": "absolute_maximum",
"unit": "mW",
"min": null,
"typ": null,
"max": 400,
"conditions": "SOT-23-5L package",
"source_page": 4,
"source": "datasheet"
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{
"name": "Operating Ambient Temperature Range",
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"kind": "absolute_maximum",
"unit": "°C",
"min": -40,
"typ": null,
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"conditions": "",
"source_page": 4,
"source": "datasheet"
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{
"name": "Junction Temperature",
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"kind": "absolute_maximum",
"unit": "°C",
"min": -40,
"typ": null,
"max": 125,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Storage Temperature",
"symbol": "Tstg",
"kind": "absolute_maximum",
"unit": "°C",
"min": -65,
"typ": null,
"max": 125,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Lead Temperature (Soldering)",
"symbol": "Tsolder",
"kind": "absolute_maximum",
"unit": "°C",
"min": null,
"typ": null,
"max": 260,
"conditions": "10s",
"source_page": 4,
"source": "datasheet"
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{
"name": "ESD rating HBM",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 4000,
"conditions": "JESD22-A114A",
"source_page": 4,
"source": "datasheet"
},
{
"name": "ESD rating MM",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 200,
"conditions": "JESD22-A115A",
"source_page": 4,
"source": "datasheet"
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{
"name": "Input voltage range",
"symbol": "VCC",
"kind": "recommended_operating",
"unit": "V",
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"typ": null,
"max": 6.5,
"conditions": "",
"source_page": 4,
"source": "datasheet"
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{
"name": "BAT Pin Output Current (Continuous)",
"symbol": "IBAT",
"kind": "recommended_operating",
"unit": "mA",
"min": 10,
"typ": null,
"max": 600,
"conditions": "Footnote 2: thermal regulation reduces current at TJ 120°C",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Operating junction temperature range",
"symbol": "TJ",
"kind": "recommended_operating",
"unit": "°C",
"min": 0,
"typ": null,
"max": 70,
"conditions": "",
"source_page": 4,
"source": "datasheet"
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{
"name": "Fast-charge current programming resistor",
"symbol": "RPROG",
"kind": "recommended_operating",
"unit": "kΩ",
"min": 1.66,
"typ": null,
"max": 100,
"conditions": "Use 1% tolerance metal film resistor (footnote 3)",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Undervoltage Lockout Threshold",
"symbol": "VUVL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 3.9,
"max": null,
"conditions": "VCC Rising: 0V→4V",
"source_page": 5,
"source": "datasheet"
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{
"name": "Hysteresis on UVLO",
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"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 150,
"max": null,
"conditions": "VCC Falling: 4V→0V",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Manual Shutdown Threshold Voltage (PROG pin rising)",
"symbol": "VMSD",
"kind": "electrical",
"unit": "V",
"min": 1.15,
"typ": 1.21,
"max": 1.3,
"conditions": "PROG Pin Rising",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Manual Shutdown Threshold Voltage (PROG pin falling)",
"symbol": "VMSD",
"kind": "electrical",
"unit": "V",
"min": 0.9,
"typ": 1,
"max": 1.1,
"conditions": "PROG Pin Falling",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Input Supply Current, Charge Mode",
"symbol": "ICC(CHG)",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 100,
"max": 200,
"conditions": "Charge Mode, RPROG=10kΩ",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Input Supply Current, Standby Mode (Charge Terminated)",
"symbol": "ICC(STB)",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 25,
"max": 50,
"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Input Supply Current, Shutdown Mode",
"symbol": "ICC(SHDN)",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 25,
"max": 50,
"conditions": "RPROG Not Connected or VCC<VUVL",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Input Supply Current, Sleep Mode",
"symbol": "ICC(SLP)",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 25,
"max": 50,
"conditions": "VUVL < VCC < VBAT + VSLP",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Battery leakage current into BAT pin, Standby Mode",
"symbol": "IBAT(STB)",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": -2.5,
"max": -6,
"conditions": "Standby Mode (Charge Terminated), VBAT = VFLOAT",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Battery leakage current into BAT pin, Shutdown Mode",
"symbol": "IBAT(SHDN)",
"kind": "electrical",
"unit": "µA",
"min": -2,
"typ": 1,
"max": 2,
"conditions": "Shutdown Mode (RPROG Not Connected or VCC<VUVL)",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Battery leakage current into BAT pin, Sleep Mode",
"symbol": "IBAT(SLP)",
"kind": "electrical",
"unit": "µA",
"min": -2,
"typ": 1,
"max": 2,
"conditions": "Sleep Mode (VUVL < VCC < VBAT + VSLP or VCC Floating)",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Regulated Output Voltage Accuracy",
"symbol": "VFLOAT",
"kind": "tolerance",
"unit": "mV",
"min": -50,
"typ": null,
"max": 50,
"conditions": "0°C ≤ TA ≤ 85°C, IBAT = 20mA, RPROG=10kΩ",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Dropout voltage, VCC – VBAT",
"symbol": "V(DO)",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 240,
"max": null,
"conditions": "IBAT=600mA",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Fast-Charge Current Range",
"symbol": "ICHG",
"kind": "electrical",
"unit": "mA",
"min": 10,
"typ": null,
"max": 600,
"conditions": "VBAT > VTRIKL, ICHG= KPROG x VPROG /RPROG",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Fast-Charge Current Set Voltage",
"symbol": "VPROG",
"kind": "electrical",
"unit": "V",
"min": 0.9,
"typ": 1,
"max": 1.1,
"conditions": "RPROG = 10kΩ, Current Mode",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Fast-Charge Current set factor",
"symbol": "KPROG",
"kind": "electrical",
"unit": "mA ∗ kΩ / Volts",
"min": null,
"typ": 1000,
"max": null,
"conditions": "100mA≤ICHG≤600mA",
"source_page": 5,
"source": "datasheet"
},
{
"name": "External resistor range",
"symbol": "RPROG",
"kind": "electrical",
"unit": "kΩ",
"min": 1.66,
"typ": null,
"max": 100,
"conditions": "Resistor connected to PROG pin",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Fast-Charge Current in typical application",
"symbol": "ICHG",
"kind": "electrical",
"unit": "mA",
"min": 450,
"typ": 500,
"max": 550,
"conditions": "RPROG = 2kΩ, VBAT=4.0V, Current Regulation Mode",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Fast-Charge Current in typical application",
"symbol": "ICHG",
"kind": "electrical",
"unit": "mA",
"min": 90,
"typ": 100,
"max": 110,
"conditions": "RPROG = 10kΩ, VBAT=4.0V, Current Regulation Mode",
"source_page": 5,
"source": "datasheet"
},
{
"name": "PROG Pin Pull-Up Current",
"symbol": "IPROG",
"kind": "electrical",
"unit": "A",
"min": null,
"typ": 0.15,
"max": null,
"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Pre-charge to fast-charge transition threshold",
"symbol": "VTRIKL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 2.9,
"max": null,
"conditions": "RPROG = 10kΩ, VBAT Rising",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Pre-charge Hysteresis",
"symbol": "V(TRIKL-HYS)",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 100,
"max": null,
"conditions": "RPROG = 10kΩ, VBAT Falling",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Pre-charge Current range",
"symbol": "I(PRECHG)",
"kind": "electrical",
"unit": "mA",
"min": 0.3,
"typ": null,
"max": 70,
"conditions": "VBAT < VTRIKL, I(PRECHG)= KPROG x VPRECHG /RPROG",
"source_page": 6,
"source": "datasheet"
},
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