Texas Instruments SN74HCT138N Decoder / Demultiplexer HCT Family 8 Output 4 mA 4.5 V to 5.5 DIP-16

The SN74HCT138N is a 3-line to 8-line Decoder/Demultiplexer 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. The conditions at the binary-select inputs and the three enable inputs select one of eight output lines. Two active-low (G\) and one active-high (G) enable inputs reduce the need for external gates or inverters when expanding. A 24-line decoder can be implemented without external inverters and a 32-line decoder requires only one inverter. An enable input can be used as a data input for demultiplexing applications.

• Outputs can drive up to 10 LSTTL loads
• Inputs are TTL-voltage compatible
• Designed specifically for high-speed memory decoders and data transmission systems
• Incorporate three enable inputs to simplify cascading and/or data reception
• 80µA Maximum low power consumption
• ±4mA Output drive at 5V
• 1µA Maximum low input current

Applications

Industrial

Other details

Brand	TEXAS INSTRUMENTS
Part Number	SN74HCT138N
Quantity	Each

All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them. Image is for illustrative purposes only. Please refer to product description.