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SN74ALS138AN PDIP-16
TI
  • SN74ALS138AN
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SN74ALS138AN

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Decoder/Demultiplexer Single 3-to-8 16-Pin PDIP Tube

Manufacturer :
Texas Instruments, Inc
Package/Case :
PDIP-16
Product Categories :
Encoders,Decoders,Multiplexers & Demultiplexers
Datasheet:
SN74ALS138AN PDF
RoHs Status:
Lead free/RoHS Compliant
Marking Code:
SN74ALS138AN
In-stock:
10

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SN74ALS138AN Product Details

The ′ALS138A and ′AS138 are 3-line to 8-line decoders/demultiplexers designed for high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance systems, these devices can be used to minimize the effects of system decoding. When employed with high-speed memories with a fast enable circuit, the delay times of the decoder and the enable time of the memory are usually less than the typical access time of the memory. The effective system delay introduced by the Schottky-clamped system decoder is negligible.

The conditions at the binary-select (A, B, and C) inputs and the three enable (G1, , and ) 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.

The SN54ALS138A and SN54AS138 are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS138AN and SN74AS138 are characterized for operation from 0°C to 70°C.

Feature

  • Designed Specifically for High-Speed Memory Decoders and DataTransmission Systems
  • Incorporate Three Enable Inputs to Simplify Cascading and/orData Reception
  • Package Options Include Plastic Small-Outline (D) Packages,Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic(J) 300-mil DIPs
Description

The ′ALS138A and ′AS138 are 3-line to 8-line decoders/demultiplexers designed for high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance systems, these devices can be used to minimize the effects of system decoding. When employed with high-speed memories with a fast enable circuit, the delay times of the decoder and the enable time of the memory are usually less than the typical access time of the memory. The effective system delay introduced by the Schottky-clamped system decoder is negligible.

The conditions at the binary-select (A, B, and C) inputs and the three enable (G1, , and ) 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.

The SN54ALS138A and SN54AS138 are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS138A and SN74AS138 are characterized for operation from 0°C to 70°C.

Technical Parameters

Product Decoders / Demultiplexers Packaging Tube
Logic Family ALS Minimum Operating Temperature 0 C
Number of Lines (Input / Output) 3 / 8 Number of Input Lines 3
Supply Voltage Max 5.5 V Number of Output Lines 8
Supply Voltage Min 4.5 V Operating Temperature Range 0 C to + 70 C
Maximum Operating Temperature + 70 C Operating Voltage 4.5 V to 5.5 V
Mounting Style Through Hole Power Dissipation 200 mW
Package / Case PDIP-16 Factory Pack Quantity 25

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Texas Instruments, Inc

TI
Texas Instruments Incorporated designs and manufactures analog technologies, digital signal processing (DSP) and microcontroller (MCU) semiconductors. TI is a leader in semiconductor solutions for ana...
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