

3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS,Encoders,Decoders,Multiplexers & Demultiplexers 3 to 8
- Manufacturer :
- Texas Instruments, Inc
- Package/Case :
- SOIC-16
- Product Categories :
- Encoders,Decoders,Multiplexers & Demultiplexers
- Datasheet:
- SN74ALS138AD PDF
- RoHs Status:
- Rohs
- Marking Code:
- ALS138A
- In-stock:
- 313
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SN74ALS138AD 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 SN74ALS138AD 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
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 | SMD/SMT | Factory Pack Quantity | 40 |
Package / Case | SOIC-16 |
SN74ALS138AD Documents
-
SN74ALS138A Family Datasheet
SN74ALS138AD Related Products
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