74LS90 Datasheet – Decade Counter – SN74LS90

Part Number : 74LS90


Package : DIP 14 Pin Type

Manufacturers : Texas Instruments

Image :

74LS90 datasheet

Description :

Each of these monolithic counters contrains four master-slave flip-flops and additional gating to provice a divide-by-two counter and a three-stage binary counter for which the count cycle length is divide-by-five for 74LS90.

To use their maximum count length ( decade, divide-by-twelve, or four-bit binary) of these counters, the CKB input is connected to the Qa output.

Features :

1. 7490A, SN74LS90N : Decade Counters

2. 7492A, 74LS92 : Divide By-Twelve Counters,

3. 7493A, 74LS93 : 4-bit Binary Counters, SN74LS90N.

Pinouts :

Other data sheets within the file :

5490A, 5492A, 5493A, 54LS90, 54LS92


74LS90 Datasheet PDF Download

74LS90 pdf

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74HCT193 PDF – 4-bit Binary Up/Down Counter ( Datasheet )

Part Number : 74HCT193

Function : Presettable synchronous 4-bit binary up/down counter

Package : DIP, SO, SSOP, TSSOP 16 Pin Type

Manufacturers : NXP Semiconductors.

Image and Pinouts :
74HCT193 datasheet

Description :

The 74HC193, 74HCT193 is a 4-bit synchronous binary up/down counter. Separate up/down clocks, CPU and CPD respectively, simplify operation. The outputs change state synchronously with the LOW-to-HIGH transition ofeither clock input.

If the CPU clock is pulsed while CPD is held HIGH, the device will count up. If the CPD clock is pulsed while CPU is held HIGH, the device will count down. Only one clock input can be held HIGH at any time to guarantee predictable behavior.

Features and benefits :

1. Input levels:
(1) For 74HC193: CMOS level
(2) For 74HCT193: TTL level

2. Synchronous reversible 4-bit binary counting

3. Asynchronous parallel load

4. Asynchronous reset

5. Expandable without external logic

6. Complies with JEDEC standard no. 7A

Ordering Information and Function diagram


74HCT193 Datasheet PDF Download

74HCT193 pdf

Other data sheets within the file : 74HC193D, 74HC193DB, 74HC193N, 74HC193PW