SN74ALS640B-1DW

Obsolete

Texas Instruments

OCTAL BUS TRANSCEIVER 3-STATE

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SN74ALS640B-1DW

Obsolete

Texas Instruments

OCTAL BUS TRANSCEIVER 3-STATE

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Description Specifications Series Pricing CAD Documents

Description

General part information

SN74ALS640B-1 Series

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-enable () input can be used to disable the device so that the buses are effectively isolated.

The -1 version of the SN74ALS640B is identical to the standard version, except that the recommended maximum IOLfor the -1 version is increased to 48 mA. There is no -1 version of the SN54ALS640B.

The SN54ALS640B and SN54AS640 are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS640B and SN74AS640 are characterized for operation from 0°C to 70°C.

Technical Specifications

Parameters and characteristics for this part

Specification	SN74ALS640B-1DW

Current - Output High	15 mA
Current - Output Low	24 mA
Logic Type	Inverting, Transceiver
Mounting Type	Surface Mount
Number of Bits per Element	8 bits
Number of Elements	1
Operating Temperature (Max)	70 °C
Operating Temperature (Min)	0 °C
Output Type	3-State
Package Length	0.295 in
Package Name	20-SOIC
Package Width	7.5 mm
Voltage - Supply (Maximum)	5.5 V
Voltage - Supply (Minimum)	4.5 V

SN74ALS640B-1 Series

OCTAL BUS TRANSCEIVER 3-STATE

Part	Package Length	Package Name	Package Width	Mounting Type	Logic Type	Current - Output Low	Current - Output High	Voltage - Supply (Maximum)	Voltage - Supply (Minimum)	Number of Elements	Output Type	Number of Bits per Element	Operating Temperature (Max)
Texas Instruments SN74ALS640BDWG4	0.295 in	20-SOIC	7.5 mm	Surface Mount	Inverting Transceiver	24 mA	15 mA	5.5 V	4.5 V	1	3-State	8 bits	70 °C
Texas Instruments SN74ALS640B-1DWR	0.295 in	20-SOIC	7.5 mm	Surface Mount	Inverting Transceiver	24 mA	15 mA	5.5 V	4.5 V	1	3-State	8 bits	70 °C
Texas Instruments SN74ALS640BDWE4	0.295 in	20-SOIC	7.5 mm	Surface Mount	Inverting Transceiver	24 mA	15 mA	5.5 V	4.5 V	1	3-State	8 bits	70 °C
Texas Instruments SN74ALS640B-1NSR	0.209 in	20-SO 20-SOIC	5.3 mm	Surface Mount	Inverting Transceiver	24 mA	15 mA	5.5 V	4.5 V	1	3-State	8 bits	70 °C
Texas Instruments SN74ALS640BNSRG4	0.209 in	20-SO 20-SOIC	5.3 mm	Surface Mount	Inverting Transceiver	24 mA	15 mA	5.5 V	4.5 V	1	3-State	8 bits	70 °C
Texas Instruments SN74ALS640BDWR	0.295 in	20-SOIC	7.5 mm	Surface Mount	Inverting Transceiver	24 mA	15 mA	5.5 V	4.5 V	1	3-State	8 bits	70 °C
Texas Instruments SN74ALS640B-1N	0.3 in	20-DIP 20-PDIP	7.62 mm	Through Hole	Inverting Transceiver	24 mA	15 mA	5.5 V	4.5 V	1	3-State	8 bits	70 °C
Texas Instruments SN74ALS640BDWRE4	0.295 in	20-SOIC	7.5 mm	Surface Mount	Inverting Transceiver	24 mA	15 mA	5.5 V	4.5 V	1	3-State	8 bits	70 °C
Texas Instruments SN74ALS640BNSR	0.209 in	20-SO 20-SOIC	5.3 mm	Surface Mount	Inverting Transceiver	24 mA	15 mA	5.5 V	4.5 V	1	3-State	8 bits	70 °C
Texas Instruments SN74ALS640B-1N3	0.3 in	20-DIP 20-PDIP	7.62 mm	Through Hole	Inverting Transceiver	24 mA	15 mA	5.5 V	4.5 V	1	3-State	8 bits	70 °C

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

Octal Bus Transceivers With 3-State Outputs datasheet (Rev. A)