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Hitachi Power Semiconductor Device Electronic Components Datasheet

HD74LV165A Datasheet

Parallel-Load 8-bit Shift Register

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HD74LV165A
Parallel-Load 8-bit Shift Register
ADE-205-267 (Z)
1st Edition
March 1999
Description
The HD74LV165A is 8-bit serial shift register shifts data from QA to QH when clocked. Parallel inputs to
each stage are enabled by a low level at the Shift/Load input. Also included is a gated clock input and a
complementary output from the eighth bit.
Clocking is accomplished through a 2-input NOR gate permitting one input to be used as a clock inhibit
function. Holding either of the clock inputs high inhibits clocking, and high enables the other clock input.
Data transfer occurs on the positive going edge of the clock. Parallel loading is inhibited as long as the
Shift/Load input is high. When taken low, data at the parallel inputs is loaded directly into the register
independent of the state of the clock.
Low-voltage and high-speed operation is suitable for the battery-powered products (e.g., notebook
computers), and the low-power consumption extends the battery life.
Features
VCC = 2.0 V to 5.5 V operation
All inputs VIH (Max.) = 5.5 V (@VCC = 0 V to 5.5 V)
All outputs VO (Max.) = 5.5 V (@VCC = 0 V)
Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C)
Typical VOH undershoot > 2.3 V (@VCC = 3.3 V, Ta = 25°C)
Output current ±6 mA (@VCC = 3.0 V to 3.6 V), ±12 mA (@VCC = 4.5 V to 5.5 V)


Hitachi Power Semiconductor Device Electronic Components Datasheet

HD74LV165A Datasheet

Parallel-Load 8-bit Shift Register

No Preview Available !

HD74LV165A
Function Table
Inputs
Internal Outputs
SH/LD
CLK INH CLK
SER
A ... H
QA
QB
L
X
X
X
a ... h
a
b
H L H X H QAn
H L L X L QAn
H
H
X
X
X
QA0
QB0
H
X
H
X
X
QA0
QB0
H L H X H QAn
H L L X L QAn
Note: H: High level
L: Low level
: Low to high transition
X: Immaterial
a ... h: Parallel data
QA0 ... QH0: Outputs remain unchanged.
QAn ... QGn: Data shifted from the previous stage on a positive edge at the clock input.
Output
QH
h
QGn
QGn
QH0
QH0
QGn
QGn
Pin Arrangement
SH/LD 1
CLK 2
E3
F4
G5
H6
QH 7
GND 8
(Top view)
16 VCC
15 CLK INH
14 D
13 C
12 B
11 A
10 SER
9 QH
2


Part Number HD74LV165A
Description Parallel-Load 8-bit Shift Register
Maker Hitachi Semiconductor
Total Page 17 Pages
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