LPC1758FBD80K from NXP Semicon, in a LQFP-80(12x12). 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	TDO/SWO	output	JTAG Test Data Out / Serial Wire trace output.
2	TDI	input	JTAG Test Data In. Internal pull-up.
3	TMS/SWDIO	bidirectional	JTAG Test Mode Select / Serial Wire Debug bidirectional data.
4	TRST	input	JTAG Test Reset input. Internal pull-up.
5	TCK/SWDCLK	input	JTAG Test Clock / Serial Wire Debug clock.
6	P0[26]/AD0[3]/AOUT/RXD3	bidirectional	GPIO P0.26, muxed with ADC0 channel 3, 10-bit DAC output AOUT, and UART3 RXD.
7	P0[25]/AD0[2]/I2SRX_SDA/TXD3	bidirectional	GPIO P0.25, muxed with ADC0 channel 2, I2S receive data, and UART3 TXD.
8	VDDA	power_in	Analog 3.3 V pad supply. Should be nominally VDD(3V3) but isolated for noise; powers ADC/DAC.
9	VSSA	power_in	Analog ground; 0 V reference for the analog block, isolated from VSS.
10	VREFP	power_in	ADC/DAC positive reference voltage; nominally VDDA.
11	RSTOUT	output	3.3 V reset-out indicator; LOW while the MCU is in reset.
12	VREFN	power_in	ADC/DAC negative reference voltage; nominally VSS.
13	RTCX1	input	Input to the 32.768 kHz RTC oscillator circuit.
14	RESET	input	Active-low external reset input; TTL hysteresis, 5 V tolerant; 50 ns min pulse.
15	RTCX2	output	Output from the RTC oscillator amplifier.
16	VBAT	power_in	RTC battery/back-up supply; 3.3 V powers the RTC domain when VDD is removed.
17	P1[31]/SCK1/AD0[5]	bidirectional	GPIO P1.31, muxed with SSP1 SCK and ADC0 channel 5.
18	P1[30]/VBUS/AD0[4]	bidirectional	GPIO P1.30, muxed with USB VBUS sense input and ADC0 channel 4. VBUS must be HIGH for USB reset.
19	XTAL1	input	Main oscillator input / external clock input.
20	XTAL2	output	Main oscillator amplifier output.
21	VDD(3V3)	power_in	3.3 V I/O supply voltage (one of four VDD(3V3) pins).
22	P0[29]/USB_D+	bidirectional	GPIO P0.29 / USB bidirectional D+ line.
23	P0[30]/USB_D-	bidirectional	GPIO P0.30 / USB bidirectional D- line.
24	VSS	power_in	Digital ground; 0 V reference (one of six VSS pins).
25	P1[18]/USB_UP_LED/PWM1[1]/CAP1[0]	bidirectional	GPIO P1.18, muxed with USB GoodLink LED output, PWM1 ch1, and Timer1 capture 0.
26	P1[19]/MCOA0/USB_PPWR/CAP1[1]	bidirectional	GPIO P1.19, muxed with motor-control PWM channel 0 A output, USB port-power enable, and Timer1 capture 1.
27	P1[20]/MCI0/PWM1[2]/SCK0	bidirectional	GPIO P1.20, muxed with MC PWM ch0 input / QEI PHA, PWM1 ch2, and SSP0 SCK.
28	P1[22]/MCOB0/USB_PWRD/MAT1[0]	bidirectional	GPIO P1.22, muxed with MC PWM ch0 B output, USB power-status input, and Timer1 match 0.
29	P1[23]/MCI1/PWM1[4]/MISO0	bidirectional	GPIO P1.23, muxed with MC PWM ch1 input / QEI PHB, PWM1 ch4, and SSP0 MISO.
30	P1[24]/MCI2/PWM1[5]/MOSI0	bidirectional	GPIO P1.24, muxed with MC PWM ch2 input / QEI INDEX, PWM1 ch5, and SSP0 MOSI.
31	P1[25]/MCOA1/MAT1[1]	bidirectional	GPIO P1.25, muxed with MC PWM ch1 A output and Timer1 match 1.
32	P1[26]/MCOB1/PWM1[6]/CAP0[0]	bidirectional	GPIO P1.26, muxed with MC PWM ch1 B output, PWM1 ch6, and Timer0 capture 0.
33	VSS	power_in	Digital ground; 0 V reference.
34	VDD(REG)(3V3)	power_in	3.3 V supply for the on-chip core voltage regulator only.
35	P1[28]/MCOA2/PCAP1[0]/MAT0[0]	bidirectional	GPIO P1.28, muxed with MC PWM ch2 A output, PWM1 capture 0, and Timer0 match 0.
36	P1[29]/MCOB2/PCAP1[1]/MAT0[1]	bidirectional	GPIO P1.29, muxed with MC PWM ch2 B output, PWM1 capture 1, and Timer0 match 1.
37	P0[0]/RD1/TXD3/SDA1	bidirectional	GPIO P0.0, muxed with CAN1 RD, UART3 TXD, and I2C1 SDA (not open-drain).
38	P0[1]/TD1/RXD3/SCL1	bidirectional	GPIO P0.1, muxed with CAN1 TD, UART3 RXD, and I2C1 SCL (not open-drain).
39	P0[10]/TXD2/SDA2/MAT3[0]	bidirectional	GPIO P0.10, muxed with UART2 TXD, I2C2 SDA (not open-drain), and Timer3 match 0.
40	P0[11]/RXD2/SCL2/MAT3[1]	bidirectional	GPIO P0.11, muxed with UART2 RXD, I2C2 SCL (not open-drain), and Timer3 match 1.
41	P2[10]/EINT0/NMI	bidirectional	GPIO P2.10, muxed with external interrupt 0 and NMI. LOW during reset invokes the ISP command handler.
42	VDD(3V3)	power_in	3.3 V I/O supply voltage.
43	VSS	power_in	Digital ground; 0 V reference.
44	P0[22]/RTS1/TD1	bidirectional	GPIO P0.22, muxed with UART1 RTS (also RS-485 output-enable) and CAN1 TD.
45	P0[18]/DCD1/MOSI0/MOSI	bidirectional	GPIO P0.18, muxed with UART1 DCD, SSP0 MOSI, and SPI MOSI.
46	P0[17]/CTS1/MISO0/MISO	bidirectional	GPIO P0.17, muxed with UART1 CTS, SSP0 MISO, and SPI MISO.
47	P0[15]/TXD1/SCK0/SCK	bidirectional	GPIO P0.15, muxed with UART1 TXD, SSP0 SCK, and SPI SCK.
48	P0[16]/RXD1/SSEL0/SSEL	bidirectional	GPIO P0.16, muxed with UART1 RXD, SSP0 SSEL, and SPI SSEL.
49	P2[9]/USB_CONNECT/RXD2	bidirectional	GPIO P2.9, muxed with USB SoftConnect control output and UART2 RXD.
50	P2[8]/TD2/TXD2	bidirectional	GPIO P2.8, muxed with CAN2 TD and UART2 TXD.
51	P2[7]/RD2/RTS1	bidirectional	GPIO P2.7, muxed with CAN2 RD and UART1 RTS.
52	P2[6]/PCAP1[0]/RI1/TRACECLK	bidirectional	GPIO P2.6, muxed with PWM1 capture 0, UART1 RI, and trace clock output.
53	P2[5]/PWM1[6]/DTR1/TRACEDATA[0]	bidirectional	GPIO P2.5, muxed with PWM1 ch6, UART1 DTR (also RS-485 OE), and trace data bit 0.
54	P2[4]/PWM1[5]/DSR1/TRACEDATA[1]	bidirectional	GPIO P2.4, muxed with PWM1 ch5, UART1 DSR, and trace data bit 1.
55	P2[3]/PWM1[4]/DCD1/TRACEDATA[2]	bidirectional	GPIO P2.3, muxed with PWM1 ch4, UART1 DCD, and trace data bit 2.
56	VDD(3V3)	power_in	3.3 V I/O supply voltage.
57	VSS	power_in	Digital ground; 0 V reference.
58	P2[2]/PWM1[3]/CTS1/TRACEDATA[3]	bidirectional	GPIO P2.2, muxed with PWM1 ch3, UART1 CTS, and trace data bit 3.
59	P2[1]/PWM1[2]/RXD1	bidirectional	GPIO P2.1, muxed with PWM1 ch2 and UART1 RXD.
60	P2[0]/PWM1[1]/TXD1	bidirectional	GPIO P2.0, muxed with PWM1 ch1 and UART1 TXD.
61	P0[9]/I2STX_SDA/MOSI1/MAT2[3]	bidirectional	GPIO P0.9, muxed with I2S TX data (SD), SSP1 MOSI, and Timer2 match 3.
62	P0[8]/I2STX_WS/MISO1/MAT2[2]	bidirectional	GPIO P0.8, muxed with I2S TX word-select, SSP1 MISO, and Timer2 match 2.
63	P0[7]/I2STX_CLK/SCK1/MAT2[1]	bidirectional	GPIO P0.7, muxed with I2S TX clock (SCK), SSP1 SCK, and Timer2 match 1.
64	P0[6]/I2SRX_SDA/SSEL1/MAT2[0]	bidirectional	GPIO P0.6, muxed with I2S RX data, SSP1 SSEL, and Timer2 match 0.
65	P4[28]/RX_MCLK/MAT2[0]/TXD3	bidirectional	GPIO P4.28, muxed with I2S receive master clock, Timer2 match 0, and UART3 TXD.
66	VSS	power_in	Digital ground; 0 V reference.
67	VDD(REG)(3V3)	power_in	3.3 V supply for the on-chip core voltage regulator only.
68	P4[29]/TX_MCLK/MAT2[1]/RXD3	bidirectional	GPIO P4.29, muxed with I2S transmit master clock, Timer2 match 1, and UART3 RXD.
69	P1[15]/ENET_REF_CLK	bidirectional	GPIO P1.15 / Ethernet RMII reference clock (LPC1758 only).
70	P1[14]/ENET_RX_ER	bidirectional	GPIO P1.14 / Ethernet receive error (LPC1758 only).
71	P1[10]/ENET_RXD1	bidirectional	GPIO P1.10 / Ethernet RMII receive data 1 (LPC1758 only).
72	P1[9]/ENET_RXD0	bidirectional	GPIO P1.9 / Ethernet RMII receive data 0 (LPC1758 only).
73	P1[8]/ENET_CRS	bidirectional	GPIO P1.8 / Ethernet carrier sense (LPC1758 only).
74	P1[4]/ENET_TX_EN	bidirectional	GPIO P1.4 / Ethernet transmit-enable (LPC1758 only).
75	P1[1]/ENET_TXD1	bidirectional	GPIO P1.1 / Ethernet RMII transmit data 1 (LPC1758 only).
76	P1[0]/ENET_TXD0	bidirectional	GPIO P1.0 / Ethernet RMII transmit data 0 (LPC1758 only).
77	VDD(3V3)	power_in	3.3 V I/O supply voltage.
78	VSS	power_in	Digital ground; 0 V reference.
79	P0[2]/TXD0/AD0[7]	bidirectional	GPIO P0.2, muxed with UART0 TXD and ADC0 channel 7.
80	P0[3]/RXD0/AD0[6]	bidirectional	GPIO P0.3, muxed with UART0 RXD and ADC0 channel 6.

Key specifications

Parameter	Value
Manufacturer	NXP Semicon
Package	LQFP-80(12x12)
Category	MCU
Pins	80

Ordering variants

Same part, different packaging or reel option.

LPC1758FBD80K

CAD (KiCad official)

Symbol: LPC1758FBD80K
Footprint: Package_QFP:LQFP-80_12x12mm_P0.5mm
3D model: LQFP-80(12x12) (KiCad packages3D, STEP)

Provenance

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

Datasheet: NXP Semicon datasheet (80 pp, sha256 3db9019ee5b7e77d, retrieved 2026-08-17, tier: manufacturer)
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