Data reference

Common IC quick reference

Name: Common IC Pinout Quick Reference
Creator: Circflow
License: https://creativecommons.org/licenses/by/4.0/

59 common ICs in one table — function, package, pin count, and exactly which pins are power and ground. The fastest way to answer “where's VCC and GND on this chip?” without opening a datasheet. Each row links to the full pinout.

Timer 3

Part	Function	Pkg	Pins	Power (V+)	Ground
NE555	NE555 Timer	DIP-8	8	VCC (8)	GND (1)
NE556	NE556 Dual Timer	DIP-14	14	VCC (14)	GND (7)
TLC555	TLC555 CMOS Timer	DIP-8	8	VDD (8)	GND (1)

Op-Amp 3

Part	Function	Pkg	Pins	Power (V+)	Ground
LM358	LM358 Dual Op-Amp	DIP-8	8	VCC (8)	GND (4)
LM741	LM741 Single Op-Amp	DIP-8	8	V+ (7)	V− (4)
LM324	LM324 Quad Op-Amp	DIP-14	14	VCC (4)	GND (11)

Logic 16

Part	Function	Pkg	Pins	Power (V+)	Ground
74HC595	74HC595 Shift Register	DIP-16	16	VCC (16)	GND (8)
74HC04	74HC04 Hex Inverter	DIP-14	14	VCC (14)	GND (7)
74HC08	74HC08 Quad AND Gate	DIP-14	14	VCC (14)	GND (7)
74HC32	74HC32 Quad OR Gate	DIP-14	14	VCC (14)	GND (7)
74HC00	74HC00 Quad NAND Gate	DIP-14	14	VCC (14)	GND (7)
74HC138	74HC138 3-to-8 Decoder	DIP-16	16	VCC (16)	GND (8)
74HC165	74HC165 PISO Shift Register	DIP-16	16	VCC (16)	GND (8)
74HC74	74HC74 Dual D Flip-Flop	DIP-14	14	VCC (14)	GND (7)
74HC139	74HC139 Dual 2-to-4 Decoder	DIP-16	16	VCC (16)	GND (8)
CD4011	CD4011 Quad NAND Gate	DIP-14	14	VDD (14)	VSS (7)
74HC245	74HC245 Octal Bus Transceiver	DIP-20	20	VCC (20)	GND (10)
CD4511	CD4511 BCD-to-7-Segment Driver	DIP-16	16	VDD (16)	VSS (8)
CD4013	CD4013 Dual D Flip-Flop	DIP-14	14	VDD (14)	VSS (7)
74HC02	74HC02 Quad NOR Gate	DIP-14	14	VCC (14)	GND (7)
74HC86	74HC86 Quad XOR Gate	DIP-14	14	VCC (14)	GND (7)
74HC4051	74HC4051 8-Channel Analog Mux	DIP-16	16	VEE (7), VCC (16)	VSS (8)

MCU 3

Part	Function	Pkg	Pins	Power (V+)	Ground
ATTINY85	ATtiny85 MCU	DIP-8	8	VCC (8)	GND (4)
ATMEGA328P	ATmega328P AVR MCU	DIP-28	28	VCC (7), AVCC (20), AREF (21)	GND (8), GND (22)
ATTINY13A	ATtiny13A AVR MCU	DIP-8	8	VCC (8)	GND (4)

Comparator 3

Part	Function	Pkg	Pins	Power (V+)	Ground
LM393	LM393 Dual Comparator	DIP-8	8	VCC (8)	GND (4)
LM339	LM339 Quad Comparator	DIP-14	14	VCC (3)	GND (12)
LM2903	LM2903 Dual Comparator	DIP-8	8	VCC (8)	GND (4)

Audio 3

Part	Function	Pkg	Pins	Power (V+)	Ground
NE5532	NE5532 Dual Op-Amp	DIP-8	8	V+ (8)	V− (4)
LM386	LM386 Audio Amplifier	DIP-8	8	VS (6)	GND (4)
TL072	TL072 Dual JFET Op-Amp	DIP-8	8	V+ (8)	V− (4)

Driver 3

Part	Function	Pkg	Pins	Power (V+)	Ground
ULN2003	ULN2003A Darlington Array	DIP-16	16	COM (9)	GND (8)
L293D	L293D Motor Driver (Dual H-Bridge)	DIP-16	16	VCC2 (8), VCC1 (16)	GND (4), GND (5), GND (12), GND (13)
ULN2803	ULN2803A Darlington Array	DIP-18	18	COM (10)	GND (9)

Interface 3

Part	Function	Pkg	Pins	Power (V+)	Ground
MAX232	MAX232 RS-232 Transceiver	DIP-16	16	VCC (16)	GND (15)
MAX3232	MAX3232 RS-232 Transceiver	DIP-16	16	VCC (16)	GND (15)
SN75176	SN75176 RS-485 Transceiver	DIP-8	8	VCC (8)	GND (5)

Counter 3

Part	Function	Pkg	Pins	Power (V+)	Ground
CD4017	CD4017 Decade Counter	DIP-16	16	VDD (16)	VSS (8)
74HC161	74HC161 4-bit Binary Counter	DIP-16	16	VCC (16)	GND (8)
74HC163	74HC163 4-bit Binary Counter	DIP-16	16	VCC (16)	GND (8)

Regulator 5

Part	Function	Pkg	Pins	Power (V+)	Ground
AMS1117	AMS1117 LDO Regulator	SOT-223	3	VIN (3)	GND (1)
LM7805	LM7805 Voltage Regulator	TO-220	3	IN (1)	GND (2)
LM317	LM317 Adjustable Regulator	TO-220	3	IN (3)	—
L7812	L7812 12V Voltage Regulator	TO-220	3	IN (1)	GND (2)
78L05	78L05 100mA Voltage Regulator	TO-92	3	IN (3)	GND (2)

Transistor 5

Part	Function	Pkg	Pins	Power (V+)	Ground
2N2222	2N2222 NPN Transistor	TO-92	3	—	—
2N3904	2N3904 NPN Transistor	TO-92	3	—	—
BC547	BC547 NPN Transistor	TO-92	3	—	—
BC557	BC557 PNP Transistor	TO-92	3	—	—
2N3906	2N3906 PNP Transistor	TO-92	3	—	—

Memory 3

Part	Function	Pkg	Pins	Power (V+)	Ground
24LC256	24LC256 I²C EEPROM	DIP-8	8	VCC (8)	VSS (4)
24LC64	24LC64 I²C EEPROM	DIP-8	8	VCC (8)	VSS (4)
24LC32	24LC32 I²C EEPROM	DIP-8	8	VCC (8)	VSS (4)

Sensor 3

Part	Function	Pkg	Pins	Power (V+)	Ground
DS18B20	DS18B20 Temperature Sensor	TO-92	3	VDD (3)	GND (1)
LM35	LM35 Temperature Sensor	TO-92	3	+Vs (1)	GND (3)
TMP36	TMP36 Temperature Sensor	TO-92	3	+Vs (1)	GND (3)

MOSFET 3

Part	Function	Pkg	Pins	Power (V+)	Ground
2N7000	2N7000 N-Channel MOSFET	TO-92	3	—	—
IRF540N	IRF540N N-Channel Power MOSFET	TO-220	3	—	—
IRLZ44N	IRLZ44N Logic-Level N-Channel MOSFET	TO-220	3	—	—

How this data was compiled

Every pin assignment is transcribed from the part's manufacturer datasheet (TI, NXP, Microchip, onsemi, ST, Analog Devices…), and each part keeps a repository verification card recording the source, version and validation. Power/ground columns are derived directly from those pin definitions. Pinouts here are for the through-hole (DIP / TO-92 / TO-220 / SOT) packages noted in the “Pkg” column; SMD variants of the same part may renumber pins — confirm against the datasheet. See how Circflow is built & verified for the full process. Last reviewed: 2026-06-02.

Free to cite — a link back to this page (https://circflow.com/ic-reference) is appreciated.