Description

SN74HC138NSR: Decoder/Demultiplexer Single 3-to-8 16-Pin SOP T/R

Package: SOP-16

Mfr. Part#: SN74HC138NSR

Mfr.: TI

Datasheet: (e-mail or chat us for PDF file)

ROHS Status: 

Quality: 100% Original

Warranty: 180 days
 

The 'HC138 devices are designed to be used in high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance memory systems, these decoders can be used to 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 are usually 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 at the three enable inputs select one of eight output lines. Two active-low and one active-high 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.

Key Features

• Targeted Specifically for High-Speed Memory Decoders and Data-Transmission Systems
• Wide Operating Voltage Range of 2 V to 6 V
• Outputs Can Drive Up To 10 LSTTL Loads
• Low Power Consumption, 80-µA Max I_CC
• Typical t_pd = 15 ns
• ±4-mA Output Drive at 5 V
• Low Input Current of 1 µA Max
• Incorporate Three Enable Inputs to Simplify Cascading and/or Data Reception

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