Integrated Circuits (ICs) > Logic ICs > Buffers, Drivers and Transceivers > SN74ALS638A-1DWE4

SN74ALS638A-1DWE4

Texas Instruments

Part Number:	SN74ALS638A-1DWE4
Manufacturer:	Texas Instruments
Part Type:	Integrated Circuits (ICs) > Logic ICs > Buffers, Drivers and Transceivers > SN74ALS638A-1DWE4
Qty Available:
Description:	Bus Transceiver, ALS Series, 1-Func, 8-Bit, Inverted Output, TTL, PDSO20

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04/25/2026 – There are 515 pieces pieces of Part Number SN74ALS638A-1DWE4 Available.

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Bus Transceiver, ALS Series, 1-Func, 8-Bit, Inverted Output, TTL, PDSO20

Specifications

TYPE	DESCRIPTION
Case/Package	SOIC
Mount	Surface Mount
Number of Pins	20
High Level Output Current	24 mA
Logic Function	Inverting, Transceiver
Low Level Output Current	15 mA
Max Operating Temperature	70 °C
Max Supply Voltage	5.5 V
Min Operating Temperature	0 °C
Min Supply Voltage	4.5 V
Number of Bits per Element	8
Number of Circuits	8
Number of Elements	1
Polarity	Inverting
Propagation Delay	30 ns
Case/Package	SOIC
Mount	Surface Mount
Number of Pins	20
High Level Output Current	24 mA
Logic Function	Inverting, Transceiver
Low Level Output Current	15 mA
Max Operating Temperature	70 °C
Max Supply Voltage	5.5 V
Min Operating Temperature	0 °C
Min Supply Voltage	4.5 V
Number of Bits per Element	8
Number of Circuits	8
Number of Elements	1
Polarity	Inverting
Propagation Delay	30 ns

Documentation for Texas Instruments SN74ALS638A-1DWE4

Datasheet	View & Download SN74ALS638A-1DWE4 Datasheet
Datasheet	View & Download SN74ALS638A-1DWE4 Datasheet

Alternate Descriptions

Descriptions of Texas Instruments SN74ALS638A-1DWE4 provided by its distributors.
Bus Transceiver, ALS Series, 1-Func, 8-Bit, Inverted Output, TTL, PDSO20
Transceiver Logic IC; Logic Family:ALS; Supply Voltage Min:4.75V; Supply Voltage Max:5.25V; Package/Case:20-SOIC; No. of Pins:20; Operating Temperature Range:0°C to +70°C; Input Type:TTL; Leaded Process Compatible:Yes ;RoHS Compliant: Yes
These octal bus transceivers are designed for asynchronous two-way communication between open-collector and 3-state buses. The devices transmit data from the A bus (open-collector) to the B bus (3 state) or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable () input can be used to disable the device so the buses are isolated. The -1 version of SN74ALS638A is identical to the standard version, except that the recommended maximum IOL is increased to 48 mA. The SN74ALS638A, SN74ALS639A, SN74AS638A, and SN74AS639 are characterized for operation from 0°C to 70°C.
Descriptions of Texas Instruments SN74ALS638A-1DWE4 provided by its distributors.
Bus Transceiver, ALS Series, 1-Func, 8-Bit, Inverted Output, TTL, PDSO20
Transceiver Logic IC; Logic Family:ALS; Supply Voltage Min:4.75V; Supply Voltage Max:5.25V; Package/Case:20-SOIC; No. of Pins:20; Operating Temperature Range:0°C to +70°C; Input Type:TTL; Leaded Process Compatible:Yes ;RoHS Compliant: Yes
These octal bus transceivers are designed for asynchronous two-way communication between open-collector and 3-state buses. The devices transmit data from the A bus (open-collector) to the B bus (3 state) or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable () input can be used to disable the device so the buses are isolated. The -1 version of SN74ALS638A is identical to the standard version, except that the recommended maximum IOL is increased to 48 mA. The SN74ALS638A, SN74ALS639A, SN74AS638A, and SN74AS639 are characterized for operation from 0°C to 70°C.

SN74ALS638A-1DWE4

Texas Instruments

Specifications

Documentation for Texas Instruments SN74ALS638A-1DWE4

Alternate Descriptions

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