74LS169 Synchronous 4-Bit Up/Down Binary Counter IC

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The ‘LS169B and ‘S169 are 4-bit binary counters. The 74LS169 features an internal carry look-ahead for cascading in high speed counting applications. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when so instructed by the count-enable inputs and internal gating. These counters are fully programmable; that is the outputs may each be preset to either level. The 74LS92 IC has a wide range of working voltage, a wide range of working conditions, and directly interfaces with CMOS, NMOS, and TTL.

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What is a Binary Counter?

A Binary Counter is a serial digital counter that counts ten digits. it resets for every new clock input. As it can go through 10 unique combinations of output, it is also called as “Decade counter”. A binary counter can count 0000, 0001, 0010, 1000, 1001, 1010, 1011, 1110, 1111, 0000, and 0001 and so on. A 4 bit binary counter will act as a decade counter by skipping any six outputs out of the 16 (24) outputs.

74LS169 Pinout

74LS169 Pin Configuration

Pin No	Pin Name	Description
1	U/D’	Up-Down Count Control Input
2	CLK	Clock Pulse Input
3	A	Parallel Data Input A
4	B	Parallel Data Input B
5	C	Parallel Data Input C
6	D	Parallel Data Input D
7	ENP’	Active Low Count Enable Parallel Input
8	GND	Ground
9	LOAD’	Active low parallel load enable input
10	ENT’	Active Low Count Enable Trickle Input
11	Q_D	Flip-Flop Output D
12	Q_C	Flip-Flop Output C
13	Q_B	Flip-Flop Output B
14	Q_A	Flip-Flop Output A
15	RCO’	Active low Terminal Count Output
16	V_CC	Chip supply Voltage

74LS169 Features & Specifications

No. of Bits: 4
Typical Operating Voltage: 5V
Output type: CMOS
Operating Voltage Range: 4.5V to 5.5V
Output current when high: -0.4mA
Output current when low: 8mA
CKB and CKA input clock frequency: 32MHz and 16MHz resp.
CKA and CKB pulse width: 15nS and 30nS resp.
Programmable Look-Ahead Up/Down Binary Counter
Fully Synchronous Operation
Internal Look-Ahead
Carry Output for Cascading
Standard TTL Switching Voltages
Available in 14-pin PDIP, GDIP, PDSO packages
Function: Counter
Product type: Binary
Rating: Catalog

Applications

Astable frequency divider or counter circuit
Timing related applications
They are also used in digital devices such as digital clocks, electronic meters, and other electronic devices that display numerical information.

You can download this Datasheet for 74LS169 Synchronous 4-Bit Up/Down Binary Counter from the link given below:

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