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FM33LG025A

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FUDAN MICRO Microcontroller Units (MCUs/MPUs/SOCs), LQFP-48(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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FM33LG025A

FUDAN MICRO · Microcontroller Units (MCUs/MPUs/SOCs) · LQFP-48(7x7)

FM33LG025A from FUDAN MICRO, in a LQFP-48(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 PA15 bidirectional GPIO with alternate functions WKUP0 external wake-up, SVS external supply detection and COMP3_OUT comparator output.
2 PA0 bidirectional GPIO with alternate functions COM0 LCD drive, UART4_RX, ADC_IN5 and LUT3_OUT PGL output.
3 PA1 bidirectional GPIO with alternate functions COM1 LCD drive, UART4_TX, ADC_IN12 and LUT2_OUT PGL output.
4 PA2 bidirectional GPIO with alternate functions COM2 LCD drive, UART0_RX and LPUART0_RX.
5 PA3 bidirectional GPIO with alternate functions COM3 LCD drive, UART0_TX and LPUART0_TX.
6 PA4 bidirectional GPIO with alternate functions COM4/SEG28 LCD drive, GPT1_CH3 timer channel and COMP2_INN1 comparator input.
7 PA5 bidirectional GPIO with alternate functions COM5/SEG29 LCD drive, GPT1_CH4 timer channel and COMP2_INN2 comparator input.
8 PA6 bidirectional GPIO with alternate functions COM6/SEG30 LCD drive, OPA1_INN2 op-amp input and CAN_RX.
9 PA7 bidirectional GPIO with alternate functions COM7/SEG31 LCD drive, OPA1_INP2 op-amp input and CAN_TX.
10 PA8 bidirectional GPIO with alternate functions SEG0 LCD drive, LPT32_CH1, SPI1_SSN and COMP2_INP1 comparator input.
11 PA9 bidirectional GPIO with alternate functions SEG1 LCD drive, LPT32_CH2, SPI1_SCK and COMP2_INP2 comparator input.
12 PA11 bidirectional GPIO with alternate functions SEG32 LCD drive, I2C SCL and LPUART2_RX.
13 PA12 bidirectional GPIO with alternate functions SEG33 LCD drive, I2C SDA and LPUART2_TX.
14 PB2 bidirectional GPIO with alternate functions WKUP2 wake-up, VCIN1 LCD capacitor pin (capacitor drive mode), UART4_RX and ATIM_CH1N.
15 PB3 bidirectional GPIO with alternate functions VCIN2 LCD capacitor pin (capacitor drive mode), UART4_TX and ATIM_CH2N.
16 PB4 bidirectional GPIO with alternate functions SEG3 LCD drive, ATIM_CH1, LPUART2_RX and COMP3_INN1 comparator input.
17 PB5 bidirectional GPIO with alternate functions SEG4 LCD drive, ATIM_CH2, LPUART2_TX and COMP3_INN2 comparator input.
18 PB6 bidirectional GPIO with alternate functions SEG5 LCD drive, ATIM_CH3 and SPI2_SSN.
19 PB7 bidirectional GPIO with alternate functions SEG6 LCD drive, ATIM_CH4, SPI2_SCK and ANATST factory test channel.
20 PB8 bidirectional GPIO with alternate functions SEG7 LCD drive, SPI0_SSN, ATIM_CH3N and COMP1_INP1 comparator input.
21 PB9 bidirectional GPIO with alternate functions SEG8 LCD drive, COMP1_INP2 comparator input, SPI0_SCK and GPT0_ETR external trigger.
22 PB10 bidirectional GPIO with alternate functions SEG9 LCD drive, OPA1_INN1 op-amp input, SPI0_MISO and GPT0_CH1.
23 PB11 bidirectional GPIO with alternate functions SEG10 LCD drive, OPA1_INP1 op-amp input, SPI MOSI and GPT0_CH2.
24 PB12 bidirectional GPIO with alternate functions WKUP3 wake-up, FOUT1 clock output, ATIM_ETR external trigger and OPA1_OUT1 op-amp output.
25 PC0 bidirectional GPIO with alternate functions VDISP2 LCD external capacitor (capacitor drive mode), COMP3_INP1, LUT0_OUT PGL output and GPT1_CH1.
26 PC1 bidirectional GPIO with alternate functions VDISP3 LCD external capacitor (capacitor drive mode), COMP3_INP2, LUT1_OUT PGL output and GPT1_CH2.
27 PC2 bidirectional GPIO with alternate functions XTHIN high-frequency crystal input, UART1_RX and LPUART1_RX.
28 PC3 bidirectional GPIO with alternate functions XTHOUT high-frequency crystal output, UART1_TX and LPUART1_TX.
29 PC4 bidirectional GPIO with alternate functions SEG13 LCD drive, OPA1_OUT2 op-amp output, COMP1_OUT comparator output and UART5_RX.
30 PC5 bidirectional GPIO with alternate functions SEG14 LCD drive, DAC_OUT, COMP2_OUT comparator output and UART5_TX.
31 PC6 bidirectional GPIO with alternate functions WKUP4 wake-up, SEG15 LCD drive, GPT1_ETR external trigger and COMP1_INN2 comparator input.
32 PC7 bidirectional GPIO with alternate functions SEG16 LCD drive, SPI2_SSN and ADC_IN6.
33 PC8 bidirectional GPIO with alternate functions SEG17 LCD drive, SPI2_SCK and ADC_IN13.
34 PC9 bidirectional GPIO with alternate functions SEG18 LCD drive, SPI2_MISO and ADC_IN14.
35 PC10 bidirectional GPIO with alternate functions WKUP5 wake-up, SEG19 LCD drive, SPI2_MOSI and ADC_IN15.
36 XT32KO output 32768Hz crystal oscillator output pin.
37 XT32KI input 32768Hz crystal oscillator input pin.
38 VDD15 power_out LDO output; connect a 100nF capacitor to ground.
39 VSS power_in Ground (VSSA).
40 VDD power_in Power supply (VDDA), 1.65 to 5.5V operating range.
41 VREFP passive Reference voltage pin (ADC reference source).
42 VBAT power_in Backup power supply, 1.5 to 4.2V when power switching is used, otherwise shorted to VDD.
43 PD11 bidirectional GPIO with alternate functions WKUP6 wake-up, FOUT0 clock output, ATIM_BRK1 brake input and ADC_IN0.
44 PD0 bidirectional GPIO with alternate functions SEG22 LCD drive, UART5_RX, GPT2_CH1 and ADC_IN7.
45 PD1 bidirectional GPIO with alternate functions SEG23 LCD drive, UART5_TX, GPT2_CH2 and ADC_IN1.
46 PD7 bidirectional GPIO with alternate functions UART3_RX and SWCLK SWD interface clock.
47 PD8 bidirectional GPIO with alternate functions UART3_TX and SWIO SWD interface data.
48 NRST input Reset pin.

Key specifications

Parameter Value
Manufacturer FUDAN MICRO
Package LQFP-48(7x7)
Category Single Chip Microcomputer/Microcontroller
Pins 48

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply voltage (VDD, VDDA) relative to VSS VDD-VSS -0.3 6.5 V includes VDD, VDDA 61
Pin voltage VPIN -0.3 6.5 V VSS-0.3 to 6.5 V 61
ADC reference voltage VREFP-VREFN -0.3 6.5 V 61
Voltage difference between all ground pins /ΔVSS/ 50 mV 61
Operating temperature TA -40 105 ℃ AEC-Q100 grade 2 61
Storage temperature TSTG -55 150 ℃ 61
ESD HBM, PC5 (DAC_OUT) HBM -2000 2000 V TA=25℃, JEDEC JS-001 61
ESD HBM, all other pins HBM -4000 4000 V TA=25℃, JEDEC JS-001 61
ESD CDM CDM -1000 1000 V TA=25℃, JEDEC JS-002 61
IO latch-up LU -210 210 mA -(0.5VDD) < VI < (1.5VDD), TA=25℃, JESD78E 61
Max current into VDD (source) ∑IVDD 120 mA 61
Max current out of VSS (sink) ∑IVSS 100 mA 61
Total IO sink current ∑IIO 100 mA all IO sink 61
Total IO source current ∑IIO 120 mA all IO source 61
AHB clock frequency fHCLK 0 64 MHz TA=-40~105C 62
APB clock frequency fPCLK 0 64 MHz TA=-40~105C 62
Operating voltage range VDD 1.65 5.5 V TA=-40~105C 62
Backup supply voltage, no power switching VBAT 1.5 5.5 V power switching not used, shorted to VDD 62
Backup supply voltage, power switching VBAT 1.5 4.2 V power switching used, VBAT supplied separately 62
Junction temperature TJ -40 125 °C 62
Run mode current 8MHz IDDRUN 1.36 1.65 mA fAHB=8MHz (RCHF), PLL off, Flash 0 wait, TA=25℃, VDD=5V 62
Run mode current 8MHz IDDRUN 1.4 1.7 mA fAHB=8MHz (RCHF), PLL off, Flash 0 wait, TA=105℃, VDD=5V 62
Run mode current 24MHz IDDRUN 3.15 3.5 mA fAHB=24MHz (RCHF), PLL off, Flash 0 wait, TA=25℃, VDD=5V 62
Run mode current 24MHz IDDRUN 3.12 3.6 mA fAHB=24MHz (RCHF), PLL off, Flash 0 wait, TA=105℃, VDD=5V 62

CAD (KiCad official)

  • Symbol: FM33LG025A
  • Footprint: Package_QFP:LQFP-48_7x7mm_P0.5mm
  • 3D model: LQFP-48(7x7) (KiCad packages3D, STEP)
  • 3D model files: fm33lg025a-etched.step / fm33lg025a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); fm33lg025a.step / fm33lg025a.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: FUDAN MICRO datasheet (100 pp, sha256 bfd0cc3c1ded70af, retrieved 2026-10-23, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF