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HD74LV166A

Hitachi Semiconductor
Part Number HD74LV166A
Manufacturer Hitachi Semiconductor
Description Parallel-Load 8-bit Shift Register
Published Mar 23, 2005
Detailed Description HD74LV166A Parallel-Load 8-bit Shift Register ADE-205-268 (Z) 1st Edition March 1999 Description The HD74LV166A is 8-bi...
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HD74LV166A
HD74LV166A

Overview
HD74LV166A Parallel-Load 8-bit Shift Register ADE-205-268 (Z) 1st Edition March 1999 Description The HD74LV166A is 8-bit shift register with an output from the last stage.
Data may be loaded into the register either in parallel or in serial form.
When the Shift/Load input is low, the data is loaded asynchronously in parallel.
When the Shift/Load input is high, the data is loaded serially on the rising edge of either clock inhibit or Clock.
Clear is asynchronous and active-low.
The 2-input NOR clock may be used either by combining two independent clock sources or by designating one of the clock inputs to act as a clock inhibit.
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) HD74LV166A Function Table Inputs CLR L H H H H H SH/LD X X L H H X CLK INH X L L L L H CLK X L ↑ ↑ ↑ ↑ SER X X X H L X A .
.
.
H X X a .
.
.
h X X X Internal outputs QA L QA0 a H L QA0 QB L QB0 b QAn QAn QB0 Output QH L QH0 h QGn QGn QH0 Note: H: High level L: Low level ↑: Low to high transition X: Immaterial a .
.
.
h: Parallel data QA0 .
.
.
Q H0: Outputs remain unchanged.
QAn .
.
.
Q Gn : Data shifted from the previous stage on a positive edge at the clock input.
Pin Arrangement SER 1 A 2 B 3 C 4 D 5 CLK INH 6 CLK 7 GND 8 16 VCC 15 SH/LD 14 H 13 QH 12 G 11 F 10 E 9 CLR (Top view) 2 HD74LV166A Absolute Maximum Ratings Item Supply voltage range Input voltage range* 1 1, 2 Symbol VCC VI VO Ratings –0.
5 to 7.
0 –0.
5 to 7.
0 –0.
5 to VCC + 0.
5 –0.
5 to 7.
0 Unit V V V Conditions Output voltage range* Output: H or L VCC: OFF Input clamp current Ou...


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