A datasheet is a reference document for an integrated circuit chip (IC). The datasheet is produced by the manufacturer to assist the engineer in understanding the functionality, pin description, and electrical characteristics of the chip. A datasheet typically summarizes the functionality and pinout (pin name and location) on the first page and expands behavior, internal circuit, and electrical specifications on the remaining pages.

Every integrated circuit chip is identified in the industry by a unique part number. Engineering students slowly memorize the part numbers as they complete product designs in their undergraduate classes.

INDUSTRY DATASHEETS BY LOGIC FUNCTION	PART NUMBER
Quad 2-input Positive NAND gates	7400
Synchronous UP/DWN counter	74191
Octave Buffer / Line Driver	74244
Quad 2-input Positive NAND gates	CD4011
Hex inverters (NOT gates)	74LS04 74HC04
Quad 2-input Positive AND gates	7408
Quad 2-input Positive OR gates	7432
BCD-7SEG decoder	7447
Monostable multivibrator	74121
Astable timer	LM555
8-to-1 multiplexer (MUX81)	74151
NMOS transistor	VN10KM
NMOS transistor	2N7000
PMOS transistor	BS250P
Signal diode	1N4148
Power diode	1N4007
Temperature Sensor	LM34
Single-rail op-amp	LM324
Digital-to-analog Converter	AD557
Low-Voltage Audio Power Amp	LM386
7-Segment Display	TIL322a (NTE3079)
APP NOTE	TTL versus CMOS
APP NOTE	TTL-to-CMOS interfacing
Atmel Atmega32 Microcontroller	Full Data Sheet
Atmel Atmega32 Microcontroller	Quick Reference