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M38510/30702B2A

Dual 2-Line To 4-Line Decoders/Demultiplexers

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

M38510/30702B2A
Datasheet:

M38510/30702B2A Datasheet (PDF)
Technology family:

LS
Number of channels:

2
Operating temperature range (°C):

-55 to 125
Rating:

Military
EDA/CAD Models:

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M38510/30702B2A General Description

These Schottky-clamped TTL MSI circuits 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 Schottky-clamped system decoder is negligible.

The circuit comprises two individual two-line to four-line decoders in a single package. The active-low enable input can be used as a data line in demultiplexing applications.

All of these decoders/demultiplexers feature fully buffered inputs, each of which represents only one normalized load to its driving circuit. All inputs are clamped with high-performance Schottky diodes to suppress line-ringing and to simplify system design. The SN54LS139A and SN54S139 are characterized for operation range of 55°C to 125°C. The SN74LS139A and SN74S139A are characterized for operation from 0°C to 70°C.

Key Features

Designed Specifically for High-Speed:
- Memory Decoders
- Data Transmission Systems
Two Fully Independent 2- to 4-Line
Decoders/Demultiplexers
Schottky clamped for High Performance

Specifications

Technology family	LS	Number of channels	2
Operating temperature range (°C)	-55 to 125	Rating	Military
Supply current (max) (µA)	10000	feature-logic-family	LS
feature-logic-function	Decoder/Demultiplexer	feature-demultiplexing-capability	1-of-4
feature-number-of-elements-per-chip	2	feature-number-of-element-inputs	2
feature-number-of-element-outputs	4	feature-polarity	Inverting
feature-process-technology	Bipolar	feature-output-type
feature-maximum-low-level-output-current-ma	4	feature-maximum-high-level-output-current-ma	-0.4
feature-minimum-operating-supply-voltage-v	4.5	feature-maximum-operating-supply-voltage-v	5.5
feature-tolerant-i-os-v		feature-packaging	Tube
feature-rad-hard	No	feature-pin-count	20
feature-cecc-qualified	No	feature-esd-protection
feature-escc-qualified		feature-military
feature-aec-qualified	No	feature-aec-qualified-number
feature-auto-motive	No	feature-p-pap	No
feature-eccn-code	EAR99	feature-svhc
feature-svhc-exceeds-threshold	No