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FM33LC025N

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FUDAN MICRO Other Processors and Microcontrollers (MCUs), LQFP-48(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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FM33LC025N

FUDAN MICRO · Other Processors and Microcontrollers (MCUs) · LQFP-48(7x7)

FM33LC025N 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 PA14 bidirectional GPIO that can also serve as UART0_TX, LPUART0_TX or ADC_IN7.
2 PA15 bidirectional GPIO that can also serve as WKUP0 wake-up, SVS external supply detect input or ADC_IN10.
3 PA0 bidirectional GPIO that can also serve as LCD COM0 or UART4_RX.
4 PA1 bidirectional GPIO that can also serve as LCD COM1 or UART4_TX.
5 PA2 bidirectional GPIO that can also serve as LCD COM2, UART0_RX or LPUART0_RX.
6 PA3 bidirectional GPIO that can also serve as LCD COM3, UART0_TX or LPUART0_TX.
7 PA4 bidirectional GPIO that can also serve as LCD COM4/SEG28, GPT1_CH3 or COMP2_INN1.
8 PA5 bidirectional GPIO that can also serve as LCD COM5/SEG29, GPT1_CH4 or COMP2_INN2.
9 PA6 bidirectional GPIO that can also serve as LCD COM6/SEG30 or OPA1_INN2.
10 PA7 bidirectional GPIO that can also serve as LCD COM7/SEG31 or OPA1_INP2.
11 PA8 bidirectional GPIO that can also serve as LCD SEG0, LPT32_CH1 or COMP2_INP1.
12 PA9 bidirectional GPIO that can also serve as LCD SEG1, LPT32_CH2 or COMP2_INP2.
13 PA10 bidirectional GPIO that can also serve as WKUP1 wake-up, LCD SEG2, LPT32_ETR or COMP1_INN1.
14 PB2 bidirectional GPIO that can also serve as WKUP2 wake-up, UART4_RX or ATIM_CH1N.
15 PB3 bidirectional GPIO that can also serve as UART4_TX or ATIM_CH2N.
16 PB4 bidirectional GPIO that can also serve as LCD SEG3 or ATIM_CH1.
17 PB5 bidirectional GPIO that can also serve as LCD SEG4 or ATIM_CH2.
18 PB8 bidirectional GPIO that can also serve as LCD SEG7, SPI1_SSN or ATIM_CH3N.
19 PB9 bidirectional GPIO that can also serve as LCD SEG8, ANATST analog test, SPI1_SCK or GPT0_ETR.
20 PB10 bidirectional GPIO that can also serve as LCD SEG9, OPA1_INN1, SPI1_MISO or GPT0_CH1.
21 PB11 bidirectional GPIO that can also serve as LCD SEG10, OPA1_INP1, SPI1_MOSI or GPT0_CH2.
22 PB12 bidirectional GPIO that can also serve as WKUP3 wake-up, FOUT1 clock output or ATIM_ETR.
23 PB13 bidirectional GPIO that can also serve as LCD SEG11, OPA2_INN1, UART1_RX or LPUART1_RX.
24 PB14 bidirectional GPIO that can also serve as LCD SEG12, OPA2_INP1, UART1_TX or LPUART1_TX.
25 PC0 bidirectional GPIO that can also serve as OPA2_INN2 or GPT1_CH1.
26 PC1 bidirectional GPIO that can also serve as OPA2_INP2 or GPT1_CH2.
27 PC2 bidirectional GPIO that can also serve as XTHIN high-frequency crystal input, UART1_RX or LPUART1_RX.
28 PC3 bidirectional GPIO that can also serve as XTHOUT high-frequency crystal output, UART1_TX or LPUART1_TX.
29 PC4 bidirectional GPIO that can also serve as LCD SEG13, OPA1_OUT or UART5_RX.
30 PC5 bidirectional GPIO that can also serve as LCD SEG14, OPA2_OUT or UART5_TX.
31 PC6 bidirectional GPIO that can also serve as WKUP4 wake-up, LCD SEG15, GPT1_ETR or ADC_IN11.
32 PC7 bidirectional GPIO that can also serve as LCD SEG16, SPI2_SSN or ADC_IN8.
33 PC8 bidirectional GPIO that can also serve as LCD SEG17, SPI2_SCK or ADC_IN9.
34 PC9 bidirectional GPIO that can also serve as LCD SEG18, SPI2_MISO or ADC_IN0.
35 PC10 bidirectional GPIO that can also serve as WKUP5 wake-up, LCD SEG19, SPI2_MOSI or ADC_IN1.
36 PD9 bidirectional GPIO that can also serve as XT32KO 32768Hz crystal output.
37 PD10 bidirectional GPIO that can also serve as XT32KI 32768Hz crystal input.
38 VDD15 power_out LDO output; connect a 100nF capacitor to ground.
39 VSS power_in Ground.
40 VDD power_in Power supply.
41 PD11 bidirectional GPIO that can also serve as WKUP6 wake-up, FOUT0 clock output, ATIM_BRK1 or ADC_IN2.
42 PD0 bidirectional GPIO that can also serve as LCD SEG22, UART5_RX or ADC_IN3.
43 PD1 bidirectional GPIO that can also serve as LCD SEG23, UART5_TX or ADC_IN4.
44 PD6 bidirectional GPIO that can also serve as WKUP7 wake-up, ANATST analog test or ATIM_BRK2.
45 PD7 bidirectional GPIO that can also serve as SWCLK SWD interface clock.
46 PD8 bidirectional GPIO that can also serve as SWIO SWD interface data.
47 NRST input Global reset pin; held low for more than 8ms it triggers a system reset.
48 PA13 bidirectional GPIO that can also serve as UART0_RX, LPUART0_RX or ADC_IN6.

Key specifications

Parameter Value
Manufacturer FUDAN MICRO
Package LQFP-48(7x7)
Category Embedded Processors & Controllers
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-VSS, includes VDD and VDDA) VDD-VSS -0.3 6.5 V 63
Pin voltage VPIN -0.3 6.5 V min printed as VSS-0.3 63
Voltage difference between VDD and VDDA /ΔVDD/ 50 mV 63
Voltage difference between all ground pins /ΔVSS/ 50 mV 63
Operating temperature TA -40 85 °C 63
Storage temperature TSTG -55 150 °C 63
ESD HBM, pins other than PA11, PA12, PB12 HBM -8000 8000 V TA=25℃, JEDEC JS-001 63
ESD HBM, PA11, PA12, PB12 HBM -5000 5000 V TA=25℃, JEDEC JS-001 63
ESD CDM CDM -1000 1000 V TA=25℃, JEDEC JS-002 63
IO latch-up trigger current Itrigger -125 125 mA -(0.5VDD) < VI < (1.5VDD), TA=25℃, JESD78E 63
IO latch-up supply voltage Vsupply 8.25 V TA=25℃, JESD78E 63
Maximum current into VDD (source) ∑IVDD 90 mA 63
Maximum current out of VSS (sink) ∑IVSS 70 mA 63
Total IO sink current ∑IIO 90 mA all IO sink 63
Total IO source current ∑IIO 70 mA all IO source 63
AHB clock frequency fHCLK 0 64 Mhz 64
APB clock frequency fPCLK 0 64 Mhz 64
Operating voltage range (no USB) VDD 1.8 5.5 V BOR enabled 64
Operating voltage range (no USB) VDD 1.35 5.5 V BOR disabled 64
Analog circuit operating voltage (no USB) VDDA 1.8 5.5 V must satisfy VDDA=VDD 64
Junction temperature TJ -40 105 °C TA=-40~+85C 64

CAD (KiCad official)

  • Symbol: FM33LC025N
  • Footprint: Package_QFP:LQFP-48_7x7mm_P0.5mm
  • 3D model: LQFP-48(7x7) (KiCad packages3D, STEP)
  • 3D model files: fm33lc025n-etched.step / fm33lc025n-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); fm33lc025n.step / fm33lc025n.glb are the bare package body.

Provenance

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

  • Datasheet: FUDAN MICRO datasheet (707 pp, sha256 6d623d96ef650faf, retrieved 2026-10-22, 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