SN74ALS165
SN74ALS165 is Parallel-Load 8-Bit Register manufactured by Texas Instruments.
description
The ′ALS165 are parallel-load 8-bit serial shift registers that, when clocked, shift the data toward serial (QH and QH) outputs. Parallel-in access to each stage is provided by eight individual direct data (A- H) inputs that are enabled by a low level at the shift/load (SH/LD) input. The ′ALS165 have a clock-inhibit function and plemented serial outputs.
Clocking is acplished by a low-to-high transition of the clock (CLK) input while SH/LD is held high and the clock inhibit (CLK INH) input is held low. The functions of CLK and CLK INH are interchangeable. Since a low CLK and a low-to-high transition of CLK INH also acplishes clocking, CLK INH should be changed to the high level only while CLK is high. Parallel loading is inhibited when SH/LD is held high. The parallel inputs to the register are enabled while SH/LD is low independently of the levels of the CLK, CLK INH, or serial (SER) inputs.
SN54ALS165 . . . J PACKAGE SN74ALS165 . . . D OR N PACKAGE
(TOP VIEW)
SH/LD 1 CLK 2 E3 F4 G5 H6 QH 7 GND 8
16 VCC 15 CLK INH 14 D 13 C 12 B 11 A 10 SER 9 QH
SN54ALS165 . . . FK PACKAGE (TOP VIEW)
CLK SH/LD NC VCC CLK INH
3 2 1 20 19
E4
18 D
F5
17 C
NC 6
16 NC
G7
15 B
H8
14 A
9 10 11 12 13
QH GND
NC QH SER
- No internal connection
The SN54ALS165 is characterized for operation over the full military temperature range of
- 55°C to 125°C. The SN74ALS165 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
INPUTS FUNCTION
SH/LD CLK CLK INH
Parallel load
No...
