7400 Series

• 74HC14D - inverter

• 74HC125 - Quad buffer/line driver

• 74HC245 - Octal bus transceiver; 3-state

• 74HC164
• 74HC165 - 8-Bit Parallel-Load Shift Registers

• 74HC541 - gate control buffer

• 74HC595 - 8-Bit Shift Registers With 3-State Output Registers

• 74HC573

Common Used

Name	Type	Function
74-595	HC/HCT	8-bit shift registers, output latches, three-state parallel outputs
74-245	HC/HCT	octal bus transceiver, non-inverting three-state outputs
Example	Example	Example

• NXP 74HCT245D
• TI SN74HCT245DW RG4
• TOSHIBA 74HCT245D

derivative families

• HC – High-speed CMOS, similar performance to 74LS, 12 ns. 2.0–6.0 V.
• HCT – High speed, compatible logic levels to bipolar parts.

Header text	LOW Input	HIGH Input
HC	1.5V	3.5V
HCT	0.8V	2.0V

系列	电平	典型传输延迟ns	最大驱动电流(-Ioh/Lol)mA
AHC	CMOS 8.5 -8/8	Example	Example
AHCT	COMS/TTL 8.5 -8/8	Example	Example
HC	COMS 25 -8/8	Example	Example
HCT	COMS/TTL 25 -8/8	Example	Example
ACT	COMS/TTL 10 -24/24	Example	Example
F	TTL 6.5 -15/64	Example	Example
ALS	TTL 10 -15/64	Example	Example
LVC	Example	Example	Example
AC	Example	Example	Example
S	Example	Example	Example
LC	Example	Example	Example

Reference

• Wiki Page
• Eagle library name - 74xx-eu.lbr