Nexperia

74HC166; 74HCT166

8-bit parallel-in/serial out shift register

aaa-008823

VM

VI

GND

VI

GND

VI

GND

VI

GND

VI

GND

VM

see note (1)

CE input

PE input

Dn input

VM

VM

DS input

stable

VM

CP input

condition: MR = HIGH

stable

th

th

th

tsu

tsu

tsu

th

th

tsu

th

tsu

th

tW

tsu

tsu

The shaded areas indicate when the input is permitted to change for predictable output performance

Measurement points are given in Table 8.

(1) CE may change only from HIGH-to-LOW while CP is LOW

Fig. 10. Set-up and hold times

Table 8. Measurement points

Input

Output

Type

VI

VM

VM

74HC166

VCC

0.5VCC

0.5VCC

74HCT166

3 V

1.3 V

1.3 V

74HC_HCT166

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© Nexperia B.V. 2021. All rights reserved

Product data sheet

Rev. 5 — 9 August 2021

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