SN74ALS641A-1 Series

Octal Bus Transceivers With Open-Collector Outputs

Catalog

Octal Bus Transceivers With Open-Collector Outputs

Part	Output Type	Mounting Type	Supplier Device Package	Operating Temperature [Max]	Current - Output High, Low [custom]	Current - Output High, Low [custom]	Voltage - Supply [Min]	Voltage - Supply [Max]	Number of Bits per Element	Package / Case	Package / Case [y]	Package / Case [y]	Number of Elements	Package / Case	Package / Case
Texas Instruments SN74ALS641ADWR	Open Collector	Surface Mount	20-SOIC	70 °C	24 mA	-	4.5 V	5.5 V	8	20-SOIC	0.295 in	7.5 mm	1
Texas Instruments SN74ALS641A-1NSR	Open Collector	Surface Mount	20-SO	70 °C	24 mA	-	4.5 V	5.5 V	8	20-SOIC			1	0.209 "	5.3 mm
Texas Instruments SN74ALS641ANSR	Open Collector	Surface Mount	20-SO	70 °C	24 mA	-	4.5 V	5.5 V	8	20-SOIC			1	0.209 "	5.3 mm
Texas Instruments SN74ALS641A-1DW	Open Collector	Surface Mount	20-SOIC	70 °C	24 mA	-	4.5 V	5.5 V	8	20-SOIC	0.295 in	7.5 mm	1
Texas Instruments SN74ALS641AN	Open Collector	Through Hole	20-PDIP	70 °C	24 mA	-	4.5 V	5.5 V	8	20-DIP			1	0.3 in	7.62 mm
Texas Instruments SN74ALS641A-1N	Open Collector	Through Hole	20-PDIP	70 °C	24 mA	-	4.5 V	5.5 V	8	20-DIP			1	0.3 in	7.62 mm
Texas Instruments SN74ALS641A-1DWR	Open Collector	Surface Mount	20-SOIC	70 °C	24 mA	-	4.5 V	5.5 V	8	20-SOIC	0.295 in	7.5 mm	1

Catalog

Octal Bus Transceivers With Open-Collector Outputs

Key Features

• Bidirectional Bus Transceivers in High-Density 20-Pin PackagesChoice of True or Inverting LogicPackage Options Include Plastic Small-Outline (DW) Packages and Standard Plastic (N) 300-mil DIPsBidirectional Bus Transceivers in High-Density 20-Pin PackagesChoice of True or Inverting LogicPackage Options Include Plastic Small-Outline (DW) Packages and Standard Plastic (N) 300-mil DIPs

Description

These octal bus transceivers are designed for asynchronous two-way communication between data buses. These devices transmit data from the A bus to the B bus or from the B bus to the A bus, depending upon the level at the direction-control (DIR) input. The output-enableinput disables the device so that the buses are effectively isolated. The -1 versions of the SN74ALS641A and SN74ALS642A are identical to the standard versions, except that the recommended maximum IOLis increased to 48 mA in the -1 versions. The SN74ALS641A, SN74ALS642A, and SN74AS641 are characterized for operation from 0°C to 70°C. These octal bus transceivers are designed for asynchronous two-way communication between data buses. These devices transmit data from the A bus to the B bus or from the B bus to the A bus, depending upon the level at the direction-control (DIR) input. The output-enableinput disables the device so that the buses are effectively isolated. The -1 versions of the SN74ALS641A and SN74ALS642A are identical to the standard versions, except that the recommended maximum IOLis increased to 48 mA in the -1 versions. The SN74ALS641A, SN74ALS642A, and SN74AS641 are characterized for operation from 0°C to 70°C.