MC74AC161 Series

Synchronous Presettable Binary Counter

Catalog

Synchronous Presettable Binary Counter

Part	Supplier Device Package	Reset	Voltage - Supply [Min]	Voltage - Supply [Max]	Number of Bits per Element	Trigger Type	Count Rate	Number of Elements	Mounting Type	Package / Case	Package / Case	Package / Case	Timing	Logic Type	Operating Temperature [Max]	Operating Temperature [Min]	Direction	Package / Case [x]	Package / Case [y]
ON Semiconductor 74AC161PC	16-PDIP	Asynchronous	2 V	6 V	4	Positive Edge	167 MHz	1	Through Hole	0.3 in	16-DIP	7.62 mm	Synchronous	Binary Counter	85 °C	-40 °C	Up
ON Semiconductor 74AC161MTCX	16-TSSOP	Asynchronous	2 V	6 V	4	Positive Edge	167 MHz	1	Surface Mount		16-TSSOP		Synchronous	Binary Counter	85 °C	-40 °C	Up	0.173 in	4.4 mm
ON Semiconductor MC74AC161DR2G	16-SOIC	Asynchronous	2 V	6 V	4	Positive Edge	167 MHz	1	Surface Mount		16-SOIC		Synchronous	Binary Counter	85 °C	-40 °C	Up	0.154 in	3.9 mm
ON Semiconductor 74AC161SCX	16-SOIC	Asynchronous	2 V	6 V	4	Positive Edge	167 MHz	1	Surface Mount		16-SOIC		Synchronous	Binary Counter	85 °C	-40 °C	Up	0.154 in	3.9 mm
ON Semiconductor 74AC161SJ	16-SOP	Asynchronous	2 V	6 V	4	Positive Edge	167 MHz	1	Surface Mount	0.209 "	16-SOIC	5.3 mm	Synchronous	Binary Counter	85 °C	-40 °C	Up
ON Semiconductor MC74AC161N	16-PDIP	Asynchronous	2 V	6 V	4	Positive Edge	167 MHz	1	Through Hole	0.3 in	16-DIP	7.62 mm	Synchronous	Binary Counter	85 °C	-40 °C	Up
ON Semiconductor MC74AC161MG	16-SOEIAJ	Asynchronous	2 V	6 V	4	Positive Edge	167 MHz	1	Surface Mount	0.209 "	16-SOIC	5.3 mm	Synchronous	Binary Counter	85 °C	-40 °C	Up
ON Semiconductor 74AC161SJX	16-SOP	Asynchronous	2 V	6 V	4	Positive Edge	167 MHz	1	Surface Mount	0.209 "	16-SOIC	5.3 mm	Synchronous	Binary Counter	85 °C	-40 °C	Up
ON Semiconductor 74AC161SJX	16-SOP	Asynchronous	2 V	6 V	4	Positive Edge	167 MHz	1	Surface Mount	0.209 "	16-SOIC	5.3 mm	Synchronous	Binary Counter	85 °C	-40 °C	Up
ON Semiconductor 74AC161SCX	16-SOIC	Asynchronous	2 V	6 V	4	Positive Edge	167 MHz	1	Surface Mount		16-SOIC		Synchronous	Binary Counter	85 °C	-40 °C	Up	0.154 in	3.9 mm

Catalog

Synchronous Presettable Binary Counter

Key Features

• Synchronous Counting and Loading

• High-Speed Synchronous Expansion

• Typical Count Rate of 125 MHz

• Outputs Source/Sink 24 mA

• ACT161 and ACT163 Have TTL Compatible Inputs

• These devices are available in Pb-free package(s). Specifications herein apply to both standard and Pb-free devices. Please see our website at www.onsemi.com for specific Pb-free orderable part numbers, or contact your local ON Semiconductor sales office or representative.

Description

The MC74AC161/74ACT161 and MC74AC163/74ACT163 are high-speed synchronous modulo-16 binary counters. They are synchronously presettable for application in programmable dividers and have two types of Count Enable inputs plus a Terminal Count output for versatility in forming synchronous multistage counters. The MC74AC161/74ACT161 has an asynchronous Master Reset input that overrides all other inputs and forces the outputs LOW. The MC74AC163/ 74ACT163 has a Synchronous Reset input that overrides counting and parallel loading and allows the outputs to be simultaneously reset on the rising edge of the clock.