Product Summary

The 74HC161D is a Presettable synchronous 4-bit binary counter. It is pin compatible with low power Schottky TTL(LSTTL). The device is specified in compliance with JEDEC standard no. 7A. The The 74HC161D is a synchronous presettable binary counter which features an internal look-ahead carry and can be used for high-speed counting. Synchronous operation is provided by having all flip-flops clocked simultaneously on the positive-going edge of the clock (CP). The outputs (Q0 to Q3) of the 74HC161D may be preset to a HIGH or LOW level. A LOW level at the parallel enable input (PE) disables the counting action and causes the data at the data inputs(D0 to D3) to be loaded into the 74HC161D on the positive-going edge of the clock (providing that the set-up and hold time requirements for PE are met). Preset takes place regardless of the levels at count enable inputs(CEP and CET).

Parametrics

74HC161D absolute maximum ratigns:(1)propagation delay, CP to Qn: 19ns, CP to TC: 21ns, MR to Qn: 20ns, MR to TC: 20ns, CET to TC: 10ns; (2)maximum clock frequency: 44MHz; (3)input capacitance: 3.5pF; (4)power dissipation capacitance per package: 33pF.

Features

74HC161D features: (1)Synchronous counting and loading; (2)Two count enable inputs for n-bit cascading; (3)Positive-edge triggered clock; (4)Asynchronous reset; (5)Output capability: standard; (6)ICC category: MSI.

Diagrams

74HC161D block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
74HC161D,652
74HC161D,652

NXP Semiconductors

Counter ICs SYNC 4-BIT BINARY COUNTER

Data Sheet

0-1: $0.27
1-25: $0.23
25-100: $0.19
100-250: $0.15
74HC161D,653
74HC161D,653

NXP Semiconductors

Counter ICs SYNC 4-BIT BINARY COUNTER

Data Sheet

0-1: $0.09
1-25: $0.09
25-100: $0.08
100-250: $0.08
74HC161DB,118
74HC161DB,118

NXP Semiconductors

Counter ICs SYNC 4-BIT BINARY

Data Sheet

0-1: $0.46
1-25: $0.40
25-100: $0.35
100-250: $0.31
74HC161DB,112
74HC161DB,112

NXP Semiconductors

Counter ICs SYNC 4-BIT BINARY

Data Sheet

0-1: $0.46
1-25: $0.40
25-100: $0.35
100-250: $0.31
74HC161DB
74HC161DB

NXP Semiconductors

Counter ICs SYNC 4-BIT BINARY COUNTER

Data Sheet

Negotiable 
74HC161DB-T
74HC161DB-T

NXP Semiconductors

Counter ICs SYNC 4-BIT BINARY COUNTER

Data Sheet

Negotiable