STC8G2K64S4-36I-LQFP48 from STC Micro, in a LQFP-48(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	P5.3/PWM53/TxD4_2	bidirectional	Standard I/O port P5.3. Muxed: enhanced PWM53 output, alternate UART4 TxD.
2	P0.5/PWM05/AD5/ADC13/T3CLKO	bidirectional	Standard I/O port P0.5. Muxed: PWM05, external-bus AD5 address/data line, ADC channel 13, Timer3 clock-divider output.
3	P0.6/PWM06/AD6/ADC14/T4/PWMFLT2	bidirectional	Standard I/O port P0.6. Muxed: PWM06, AD6 bus line, ADC channel 14, Timer4 external clock input, enhanced-PWM fault-detect input PWMFLT2.
4	P0.7/PWM07/AD7/T4CLKO/PWMFLT3	bidirectional	Standard I/O port P0.7. Muxed: PWM07, AD7 bus line, Timer4 clock-divider output, PWM fault-detect input PWMFLT3.
5	P1.0/PWM10/ADC0/CCP1/RxD2	bidirectional	Standard I/O port P1.0. Muxed: PWM10, ADC channel 0, PCA/CCP1 capture/compare/PWM, UART2 RxD.
6	P1.1/PWM11/ADC1/CCP0/TxD2	bidirectional	Standard I/O port P1.1. Muxed: PWM11, ADC channel 1, PCA/CCP0, UART2 TxD.
7	P4.7/PWM47/TxD2_2	bidirectional	Standard I/O port P4.7. Muxed: PWM47, alternate UART2 TxD.
8	P1.2/PWM12/ADC2/ECI/SS/T2	bidirectional	Standard I/O port P1.2. Muxed: PWM12, ADC channel 2, PCA external ECI input, SPI slave-select, Timer2 external clock input.
9	P1.3/PWM13/ADC3/MOSI/T2CLKO	bidirectional	Standard I/O port P1.3. Muxed: PWM13, ADC channel 3, SPI MOSI, Timer2 clock-divider output.
10	P1.4/PWM14/ADC4/MISO/SDA	bidirectional	Standard I/O port P1.4. Muxed: PWM14, ADC channel 4, SPI MISO, I2C SDA data line.
11	P1.5/PWM15/ADC5/SCLK/SCL	bidirectional	Standard I/O port P1.5. Muxed: PWM15, ADC channel 5, SPI SCLK, I2C SCL clock line.
12	P1.6/PWM16/ADC6/RxD_3/MCLKO_2/XTALO	bidirectional	Standard I/O port P1.6. Muxed: PWM16, ADC channel 6, alt UART1 RxD, master-clock divider output, external crystal output (XTALO).
13	P1.7/PWM17/ADC7/TxD_3/XTALI	bidirectional	Standard I/O port P1.7. Muxed: PWM17, ADC channel 7, alt UART1 TxD, external crystal / external clock input (XTALI).
14	P5.4/PWM54/nRST/MCLKO/SS_3	bidirectional	Standard I/O port P5.4. Muxed with active-low reset input nRST, master-clock output MCLKO, and SPI alternate slave-select SS_3. When configured as reset, an internal ~4 kΩ pull-up is enabled continuously; when used as GPIO, the pull-up still asserts for ~6.5 ms after power-on.
15	VCC/AVCC	power_in	Main digital supply VCC and analog supply AVCC (bonded to same pin on LQFP48). Operating range 2.0-5.5 V. Add 0.1 µF ceramic and ≥10 µF bulk decoupling close to the pin.
16	ADC_VRef+	input	External ADC positive reference input, 2.4 V to VCC. Must be driven (do not leave floating - leakage present). Can be tied to VCC for low-precision use.
17	GND/AGND	power_in	Combined digital and analog ground return.
18	P4.0/PWM40/MOSI_3	bidirectional	Standard I/O port P4.0. Muxed: PWM40, alternate SPI MOSI (group 3).
19	P3.0/PWM30/RxD/INT4	bidirectional	Standard I/O port P3.0. Default UART1 RxD, external interrupt INT4, PWM30. Powers up as weak-pull-up quasi-bidirectional (unlike other I/Os which power up hi-Z). Combined low state on P3.0+P3.1+P3.2 at reset enters USB-ISP mode.
20	P3.1/PWM31/TxD	bidirectional	Standard I/O port P3.1. Default UART1 TxD, PWM31. Powers up as weak-pull-up quasi-bidirectional; participates in USB-ISP entry detection.
21	P3.2/PWM32/INT0/SCLK_4/SCL_4	bidirectional	Standard I/O port P3.2. Muxed: PWM32, external interrupt INT0, alt SPI SCLK (group 4), alt I2C SCL (group 4). Sampled at power-up for USB-ISP mode entry.
22	P3.3/PWM33/INT1/MISO_4/SDA_4	bidirectional	Standard I/O port P3.3. Muxed: PWM33, external interrupt INT1, alt SPI MISO (group 4), alt I2C SDA (group 4).
23	P3.4/PWM34/T0/T1CLKO/ECI_2/MOSI_4/CMPO	bidirectional	Standard I/O port P3.4. Muxed: PWM34, Timer0 external clock in, Timer1 clock-divider out, alt PCA ECI, alt SPI MOSI (group 4), analog-comparator output CMPO.
24	P5.0/PWM50/RxD3_2	bidirectional	Standard I/O port P5.0. Muxed: PWM50, alternate UART3 RxD.
25	P5.1/PWM51/TxD3_2	bidirectional	Standard I/O port P5.1. Muxed: PWM51, alternate UART3 TxD.
26	P3.5/PWM35/T1/T0CLKO/SS_4/CCP0_2/PWMFLT	bidirectional	Standard I/O port P3.5. Muxed: PWM35, Timer1 external clock in, Timer0 clock-divider out, SPI SS (group 4), PCA CCP0 (group 2), enhanced-PWM fault input PWMFLT.
27	P3.6/PWM36/INT2/RxD_2/CMP-/CCP1_2	bidirectional	Standard I/O port P3.6. Muxed: PWM36, external interrupt INT2, alt UART1 RxD, comparator negative input CMP-, PCA CCP1 (group 2).
28	P3.7/PWM37/INT3/TxD_2/CMP+/CCP2/CCP2_2	bidirectional	Standard I/O port P3.7. Muxed: PWM37, external interrupt INT3, alt UART1 TxD, comparator positive input CMP+, PCA CCP2 (default and group-2 alternate).
29	P4.1/PWM41/MISO_3/CMPO_2	bidirectional	Standard I/O port P4.1. Muxed: PWM41, alt SPI MISO (group 3), alt comparator output CMPO.
30	P4.2/PWM42/WR	bidirectional	Standard I/O port P4.2. Muxed: PWM42, external-bus write strobe WR.
31	P4.3/PWM43/RxD_4/SCLK_3	bidirectional	Standard I/O port P4.3. Muxed: PWM43, alt UART1 RxD (group 4), alt SPI SCLK (group 3).
32	P4.4/PWM44/RD/TxD_4	bidirectional	Standard I/O port P4.4. Muxed: PWM44, external-bus read strobe RD, alt UART1 TxD (group 4).
33	P2.0/PWM20/A8	bidirectional	Standard I/O port P2.0. Muxed: PWM20, external-bus address A8.
34	P2.1/PWM21/A9	bidirectional	Standard I/O port P2.1. Muxed: PWM21, address A9.
35	P2.2/PWM22/A10/SS_2	bidirectional	Standard I/O port P2.2. Muxed: PWM22, address A10, alt SPI SS (group 2).
36	P2.3/PWM23/A11/MOSI_2/CCP0_2	bidirectional	Standard I/O port P2.3. Muxed: PWM23, address A11, alt SPI MOSI (group 2), alt PCA CCP0.
37	P2.4/PWM24/A12/ECI_3/SDA_2/MISO_2	bidirectional	Standard I/O port P2.4. Muxed: PWM24, address A12, alt PCA ECI (group 3), alt I2C SDA (group 2), alt SPI MISO (group 2).
38	P2.5/PWM25/A13/CCP0_3/SCL_2/SCLK_2	bidirectional	Standard I/O port P2.5. Muxed: PWM25, address A13, alt PCA CCP0 (group 3), alt I2C SCL (group 2), alt SPI SCLK (group 2).
39	P2.6/PWM26/A14/CCP1_3	bidirectional	Standard I/O port P2.6. Muxed: PWM26, address A14, alt PCA CCP1 (group 3).
40	P2.7/PWM27/A15/CCP2_3	bidirectional	Standard I/O port P2.7. Muxed: PWM27, address A15, alt PCA CCP2 (group 3).
41	P4.5/PWM45/ALE	bidirectional	Standard I/O port P4.5. Muxed: PWM45, external-bus address latch enable ALE.
42	P4.6/PWM46/RxD2_2	bidirectional	Standard I/O port P4.6. Muxed: PWM46, alt UART2 RxD.
43	P0.0/PWM00/ADC8/AD0/RxD3	bidirectional	Standard I/O port P0.0. Muxed: PWM00, ADC channel 8, external-bus AD0, UART3 RxD (default).
44	P0.1/PWM01/ADC9/AD1/TxD3	bidirectional	Standard I/O port P0.1. Muxed: PWM01, ADC channel 9, AD1, UART3 TxD (default).
45	P0.2/PWM02/ADC10/AD2/RxD4	bidirectional	Standard I/O port P0.2. Muxed: PWM02, ADC channel 10, AD2, UART4 RxD (default).
46	P0.3/PWM03/ADC11/AD3/TxD4	bidirectional	Standard I/O port P0.3. Muxed: PWM03, ADC channel 11, AD3, UART4 TxD (default).
47	P0.4/PWM04/ADC12/AD4/T3	bidirectional	Standard I/O port P0.4. Muxed: PWM04, ADC channel 12, AD4, Timer3 external clock input.
48	P5.2/PWM52/RxD4_2	bidirectional	Standard I/O port P5.2. Muxed: PWM52, alt UART4 RxD.

Key specifications

Parameter	Value
Manufacturer	STC Micro
Package	LQFP-48(7x7)
Category	MCU
Pins	48

Ordering variants

Same part, different packaging or reel option.

STC8G2K64S4-36I-LQFP48
STC8G2K64S4-36I-QFN48
STC8G2K64S4-36I-LQFP32
STC8G2K64S4-36I-QFN32
STC8G2K64S4-36I-PDIP40

CAD (KiCad official)

Symbol: STC8G2K64S4-36I-LQFP48
Footprint: Package_QFP:LQFP-48_7x7mm_P0.5mm
3D model: LQFP-48(7x7) (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`stc8g2k64s4-36i-lqfp48.step`	617 KB	You want the bare part, or you mark your own boards.
`stc8g2k64s4-36i-lqfp48-etched.step`	6.2 MB	You want the part with `STC8G2K64S4-36I-LQFP48` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 1518 faces against 747 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: STC Micro datasheet (1240 pp, sha256 7d5e82c9f651aa92, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF