component
AT9880
Public Made by Adomby adom
ZHONGKEWEI GNSS Modules, QFN-40L-EP(5x5). Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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page.json+315−8@@ -1,13 +1,325 @@ {+ "schema_version": 1,+ "type": "component", "slug": "at9880",+ "title": "AT9880",+ "brief": "ZHONGKEWEI GNSS Modules, QFN-40L-EP(5x5). Datasheet-verified pinout, KiCad symbol/footprint/3D.", "version": "0.1.0",- "type": "component",- "description": "ZHONGKEWEI GNSS Modules, QFN-40L-EP(5x5). Datasheet-verified pinout, KiCad symbol/footprint/3D.",+ "license": "CC-BY-SA-4.0", "tags": [ "component", "iot-communication modules", "at9880" ],+ "component": {+ "mpn": "AT9880",+ "manufacturer": "ZHONGKEWEI",+ "package": "QFN-40L-EP(5x5)",+ "pin_count": 41,+ "category": "IoT/Communication Modules",+ "subcategory": "GNSS Modules",+ "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/2070440b59e515adfd111dc1e919a714.pdf",+ "parts": {+ "symbol": "at9880.kicad_sym",+ "footprint": "at9880.kicad_mod",+ "model_3d": "at9880.glb",+ "model_3d_step": "at9880.step",+ "lbr": "at9880.lbr"+ },+ "distributor_links": {},+ "pins": [+ {+ "number": "1",+ "name": "RF1",+ "type": "input",+ "description": "L1-band RF signal input (1561.098 MHz min / 1575.42 MHz typ / 1602 MHz max). DC voltage must not exceed 0.8V; AC-couple with a series capacitor if the external LNA output carries DC."+ },+ {+ "number": "2",+ "name": "GND",+ "type": "power_in",+ "description": "Ground."+ },+ {+ "number": "3",+ "name": "VDD_ANA",+ "type": "power_out",+ "description": "Analog LDO output. Bypass with 1uF decoupling capacitor close to the pin."+ },+ {+ "number": "4",+ "name": "VX_OUT",+ "type": "power_out",+ "description": "TCXO supply output (1.8V typ). Bypass with 1uF decoupling capacitor; feeds the external TCXO EN/VCC."+ },+ {+ "number": "5",+ "name": "XREF",+ "type": "input",+ "description": "Reference clock input from external 26 MHz TCXO. Accepts clipped-sine drive 0.5-1.5 Vpp."+ },+ {+ "number": "6",+ "name": "TST_RF",+ "type": "unconnected",+ "description": "Factory RF test port. Leave floating in normal application."+ },+ {+ "number": "7",+ "name": "VDD_BK",+ "type": "power_out",+ "description": "Backup-domain LDO output. Bypass with 1uF decoupling capacitor close to the pin."+ },+ {+ "number": "8",+ "name": "VBAT",+ "type": "power_in",+ "description": "Backup power input for the RTC/backup-RAM domain (1.4-3.6V, 3.3V typ). Keeps RTC time and backup RAM alive when the main supply is removed to enable warm/hot start."+ },+ {+ "number": "9",+ "name": "VDD_IO",+ "type": "power_in",+ "description": "Digital I/O supply input (2.7-3.6V, 3.3V typ). Also feeds the POR and antenna-detect circuits."+ },+ {+ "number": "10",+ "name": "ANT_BIAS",+ "type": "power_out",+ "description": "Active-antenna bias/feed with integrated current sensing for antenna open/short detection and short-circuit protection (short-protection trip 45-65 mA, typ 50 mA)."+ },+ {+ "number": "11",+ "name": "RTC_O",+ "type": "output",+ "description": "32.768 kHz RTC oscillator output. Connect the 32.768 kHz crystal (12.5 pF CL, \u226480 k\u03a9 ESR) between RTC_O and RTC_I."+ },+ {+ "number": "12",+ "name": "RTC_I",+ "type": "input",+ "description": "32.768 kHz RTC oscillator input. Other terminal of the RTC crystal."+ },+ {+ "number": "13",+ "name": "GPIO2/TXD1",+ "type": "bidirectional",+ "description": "UART1 TXD (default) / general-purpose digital I/O."+ },+ {+ "number": "14",+ "name": "GPIO3/RXD1",+ "type": "bidirectional",+ "description": "UART1 RXD (default) / general-purpose digital I/O."+ },+ {+ "number": "15",+ "name": "Reserved",+ "type": "unconnected",+ "description": "Reserved. Leave floating when unused."+ },+ {+ "number": "16",+ "name": "Reserved",+ "type": "unconnected",+ "description": "Reserved. Leave floating when unused."+ },+ {+ "number": "17",+ "name": "nRST",+ "type": "input",+ "description": "Active-low external reset input, internal pull-up. Reset threshold VDD_IO \u22481.65V; internal nRESET released ~160 ms after nRST rises. Leave floating if unused."+ },+ {+ "number": "18",+ "name": "GPIO1/RXD0",+ "type": "bidirectional",+ "description": "UART0 RXD (default communication port) / general-purpose digital I/O."+ },+ {+ "number": "19",+ "name": "GPIO0/TXD0",+ "type": "bidirectional",+ "description": "UART0 TXD (default positioning output) / general-purpose digital I/O."+ },+ {+ "number": "20",+ "name": "GPIO27",+ "type": "bidirectional",+ "description": "General-purpose digital I/O (Vih \u2265 0.8\u00b7VDD_IO, Vil \u2264 0.2\u00b7VDD_IO, Voh \u2265 VDD_IO\u22120.4V, Vol \u2264 0.4V; internal 80 k\u03a9 pull-up/pull-down programmable)."+ },+ {+ "number": "21",+ "name": "DX_IN",+ "type": "power_in",+ "description": "Internal DCDC converter input (typically tied to 3.3V main supply). Decouple with a 2.2uF cap; the DCDC steps 3.3V down for the internal core LDO."+ },+ {+ "number": "22",+ "name": "DX_OUT",+ "type": "power_out",+ "description": "Internal DCDC switching-node/output. Connect the DCDC inductor (4.7uH) and 10uF output cap; the resulting rail feeds VCORE."+ },+ {+ "number": "23",+ "name": "VCORE",+ "type": "power_in",+ "description": "Core LDO input (1.2V min, 3.6V max). Normally sourced from DX_OUT via the DCDC, but may be driven from an external supply."+ },+ {+ "number": "24",+ "name": "VDD_BB",+ "type": "power_out",+ "description": "Digital core LDO output (1.0V typ). Bypass with 2.2uF decoupling capacitor close to the pin."+ },+ {+ "number": "25",+ "name": "GPIO22",+ "type": "bidirectional",+ "description": "General-purpose digital I/O; default function is 1PPS timing output."+ },+ {+ "number": "26",+ "name": "Reserved",+ "type": "unconnected",+ "description": "Reserved. Leave floating when unused."+ },+ {+ "number": "27",+ "name": "Reserved",+ "type": "unconnected",+ "description": "Reserved. Leave floating when unused."+ },+ {+ "number": "28",+ "name": "Reserved",+ "type": "unconnected",+ "description": "Factory test port. Leave floating when unused."+ },+ {+ "number": "29",+ "name": "ON_OFF",+ "type": "input",+ "description": "Shutdown/wake control input; internal pull-up. Drive low to enter sleep mode (~50 uA); leave floating if unused."+ },+ {+ "number": "30",+ "name": "GPIO4",+ "type": "bidirectional",+ "description": "General-purpose digital I/O. Leave floating when unused."+ },+ {+ "number": "31",+ "name": "GPIO5",+ "type": "bidirectional",+ "description": "General-purpose digital I/O. Leave floating when unused."+ },+ {+ "number": "32",+ "name": "GPIO8",+ "type": "bidirectional",+ "description": "General-purpose digital I/O. Leave floating when unused."+ },+ {+ "number": "33",+ "name": "GPIO7",+ "type": "bidirectional",+ "description": "General-purpose digital I/O. Leave floating when unused."+ },+ {+ "number": "34",+ "name": "GPIO6",+ "type": "bidirectional",+ "description": "General-purpose digital I/O. Leave floating when unused."+ },+ {+ "number": "35",+ "name": "GPIO10",+ "type": "bidirectional",+ "description": "General-purpose digital I/O. Leave floating when unused."+ },+ {+ "number": "36",+ "name": "GPIO9",+ "type": "bidirectional",+ "description": "General-purpose digital I/O. Leave floating when unused."+ },+ {+ "number": "37",+ "name": "DVDD",+ "type": "power_out",+ "description": "PLL LDO output. Bypass with 1uF decoupling capacitor close to the pin."+ },+ {+ "number": "38",+ "name": "GND",+ "type": "power_in",+ "description": "Ground; also acts as RF isolation pin between RF1 and RF2 - tie directly to PCB ground plane with multiple vias."+ },+ {+ "number": "39",+ "name": "RF2",+ "type": "input",+ "description": "L5-band RF signal input (1176.45 MHz). DC voltage must not exceed 0.8V; AC-couple with a series capacitor if the external LNA output carries DC."+ },+ {+ "number": "40",+ "name": "GND",+ "type": "power_in",+ "description": "Ground."+ },+ {+ "number": "EP",+ "name": "GND",+ "type": "power_in",+ "description": "Exposed thermal pad on package underside. Must be soldered directly to the PCB ground plane with a full via array for thermal and electrical grounding."+ }+ ],+ "provenance": {+ "extractor": "ds2sf",+ "datasheet": {+ "url": "https://datasheet.lcsc.com/datasheet/pdf/2070440b59e515adfd111dc1e919a714.pdf",+ "pages": 16,+ "sha256": "97d93eb7c809245b",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 41,+ "described": 41,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "metadata": {+ "specs": {+ "Manufacturer": "ZHONGKEWEI",+ "Package": "QFN-40L-EP(5x5)",+ "Category": "IoT/Communication Modules",+ "Pins": "41"+ }+ },+ "variants": [],+ "sections": [+ "hero",+ "viewers",+ "readme",+ "breadcrumbs",+ "info"+ ],+ "discovery_triggers": [+ "at9880"+ ],+ "discovery_pitch": "AT9880 (ZHONGKEWEI) component page with datasheet-verified CAD.",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }, "dependencies": {}, "hero": { "type": "image",@@ -25,10 +337,5 @@ "docs/at9880-datasheet.pdf", "viewers/symbol.html", "viewers/footprint.html"- ],- "visibility": "public",- "author": {- "name": "Ray",- "email": "[email protected]"- }+ ] }