54LS190 Datasheet Synchronous 4-Bit Up/Down Counters

Manufacturer: National Semiconductor (now Texas Instruments)

Overview: DM54LS190 DM74LS190 DM54LS191 DM74LS191 Synchronous 4-Bit Up Down Counters with Mode Control May 1989 DM54LS190 DM74LS190 DM54LS191 DM74LS191 Synchronous 4-Bit Up Down Counters with Mode.

📥 Download Datasheet

54LS190 synchronous 4-bit up/down counters by National Semiconductor (now Texas Instruments) - Datasheet Preview

Datasheet Details

Part number	54LS190
Manufacturer	National Semiconductor (now Texas Instruments)
File Size	180.58 KB
Description	Synchronous 4-Bit Up/Down Counters
Download	54LS190 Download (PDF)

General Description

These circuits are synchronous reversible up down counters The LS191 is a 4-bit binary counter and the LS190 is a BCD counter Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change simultaneously when so instructed by the steering logic This mode of operation eliminates the output counting spikes normally associated with asynchronous (ripple clock) counters The outputs of the four master-slave flip-flops are triggered on a low-to-high level transition of the clock input if the enable input is low A high at the enable input inhibits counting Level changes at either the enable input or the down up input should be made only when the clock input is high The direction of the count is determined by the level of the down up input When low the counter counts up and when high it counts down These counters are fully programmable that is the outputs may be preset to either level by placing a low on the load input and entering the desired data at the data inputs The output will change independent of the level of the clock input This

Key Features

Y Y Y Y Y Y Y Y Y Y Counts 8-4-2-1 BCD or binary Single down up count control line Count enable control input Ripple clock output for cascading Asynchronously presettable with load control Parallel outputs Cascadable for n-bit.

📁 Similar Datasheet

Brand Logo	Part Number	Description	Manufacturer
	54LS190	SYNCHRONOUS UP/DOWN COUNTERS	Texas Instruments
	54LS190	PRESETTABLE BCD/DECADE UP/DOWN COUNTERS	Motorola

More Datasheets from National Semiconductor (now Texas Instruments)

Part Number	Description
54LS194A	4-Bit Bidirectional Universal Shift Register
54LS10	Triple 3-Input NAND Gates
54LS109	Dual Positive-Edge-Triggered J-K Flip-Flops
54LS11	Triple 3-Input AND Gates
54LS114	Dual JK Flip-Flop
54LS13	DUAL 4-INPUT SCHMITT TRIGGER
54LS133	13-INPUT NAND GATE
54LS136	QUAD 2-INPUT EXCLUSIVE-OR GATE
54LS138	(54LS138 / 54LS139) Decoders/Demultiplexers
54LS139	(54LS138 / 54LS139) Decoders/Demultiplexers