74ALS642 Series

OCTAL BUS TRANSCEIVER O.C.

Catalog(5 parts)

Part	Number of Bits per Element▲▼	Output Type	Voltage - Supply▲▼	Voltage - Supply▲▼	Current - Output High, Low	Current - Output High, Low▲▼	Number of Elements▲▼	Logic Type	Supplier Device Package	Mounting Type	Package / Case	Package / Case▲▼	Package / Case▲▼	Operating Temperature▲▼	Operating Temperature▲▼	Package / Case▲▼
Texas Instruments SN74ALS642A-1N Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-PDIP	8 ul	Open Collector	5.5 V	4.5 V	-	0.024000000208616257 A	1 ul	Inverting, Transceiver	20-PDIP	Through Hole	20-DIP	0.007619999814778566 m	0.007619999814778566 m	70 °C	0 °C
Texas Instruments SN74ALS642A-1NE4 Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-PDIP	8 ul	Open Collector	5.5 V	4.5 V	-	0.024000000208616257 A	1 ul	Inverting, Transceiver	20-PDIP	Through Hole	20-DIP	0.007619999814778566 m	0.007619999814778566 m	70 °C	0 °C
Texas Instruments SN74ALS642A-1DWRG4 Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-SOIC	8 ul	Open Collector	5.5 V	4.5 V	-	0.024000000208616257 A	1 ul	Inverting, Transceiver	20-SOIC	Surface Mount	20-SOIC			70 °C	0 °C	0.007493000011891127 m, 0.007499999832361937 m
Texas Instruments SN74ALS642AN Element Bit per Element Output
Texas Instruments SN74ALS642A-1NSR Transceiver, Inverting 1 Element 8 Bit per Element Open Collector Output 20-SO	8 ul	Open Collector	5.5 V	4.5 V	-	0.024000000208616257 A	1 ul	Inverting, Transceiver	20-SO	Surface Mount	20-SOIC			70 °C	0 °C	0.0052999998442828655 m, 0.005308600142598152 m

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.