74HCT138 Datasheet – 3-to-8 Line Decoder / Demultiplexer

Part Number : 74HCT138


Package : DIP 16, PLCC 20 Pin

Manufacturers : Texas Instruments

Pinouts :
74HCT138 datasheet

Description :

The ’HCT138 devices are designed for high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance memory systems, these decoders can minimize the effects of system decoding. When employed with high-speed memories utilizing a fast enable circuit, the delay times of these decoders and the enable time of the memory usually are less than the typical access time of the memory. This means that the effective system delay introduced by the decoders is negligible.

Ordering Information

Other data sheets within the file : 54HCT138FK, 54HCT138J, 54HCT138W, 74HCT138D

74HCT138 Datasheet PDF Download

74HCT138 pdf


UM3750 Datasheet PDF – Programmable Encoder / Decoder

Part Number : UM3750

Function : Programmable Encoder / Decoder

Package : DIP 18 Pin

Manufacturers : UMC


UM3750 datasheet

Description :

The UM3750 Encoder / Decoder is a CMOS / LSI digital code Transmitter-Receiver system. Working in the transmit(encoder) mode, the UM3750 will sequentially encode and transmit 12 bits of input. Each of the 12 bits may be 1 or 0 to allow 4096 different codes.


Pinouts :

UM3750 datasheet


1. Single chip contains both Encoder and Decoder.
2. 3V to 11 V operation.
3. On chip oscillator uses non-critical RC components

4. Schmitt Trigger input provides excellent noise immunity.


Alarm control system, security system cordless telephone, remote control.

Other data sheets within the file : UM3750M

UM3750 Datasheet PDF Download

UM3750 pdf

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