National Semiconductor MM74HC164 Data Sheet

查询MM74HC164MTC供应商

74H 164 8-B it S erial-in /P arallel-o t S ift R eg ister

September 1983 Revised January 2005

MM74HC164 8-Bit Serial-in/Parallel-out Shift Register General Description Features The MM74HC164 utilizes advanced silicon-gate CMOS ■Typical operating frequency: 50 MHz technology. It has the high noise immunity and low con-

■Typical propagation delay: 19 ns (clock to Q)

sumption of standard CMOS integrated circuits. It also

■Wide operating supply voltage range: 2V to 6V

offers speeds comparable to low power Schottky devices.

■Low input current: 1 µA maximum

This 8-bit shift register has gated serial inputs and CLEAR.

■Low quiescent supply current: 80 µA maximum

Each register bit is a D-type master/slave flip-flop. Inputs A

(74HC Series)

& B permit complete control over the incoming data. A

LOW at either or both inputs inhibits entry of new data and ■Fanout of 10 LS-TTL loads

resets the first flip-flop to the low level at the next clock pulse. A high level on one input enables the other input which will then determine the state of the first flip-flop. Data at the serial inputs may be changed while the clock is HIGH or LOW, but only information meeting the setup and hold time requirements will be entered. Data is serially shifted in and out of the 8-bit register during the positive going transi- tion of the clock pulse. Clear is independent of the clock and accomplished by a low level at the CLEAR input. The 74HC logic family is functionally as well as pin-out compatible with the standard 74LS logic family. All inputs are protected from damage due to static discharge by inter- nal diode clamps to VCC and ground.

Ordering Code:

Package

Order Number Package Description

Number

MM74HC164M M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow MM74HC164MX_NL M14A Pb-Free 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow MM74HC164MTC MTC14 14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide MM74HC164MTCX_NL MTC14 Pb-Free 14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm

MM74HC164N N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Pb-Free package per JEDEC J-STD-020B.

© 2005 Fairchild Semiconductor Corporation DS005315 www.fairchildsemi.com