Specification	SN74ALS645AN

Current - Output High, Low [custom]	15 mA
Current - Output High, Low [custom]	24 mA
Mounting Type	Through Hole
Number of Bits per Element	8
Number of Elements	1
Operating Temperature [Max]	70 °C
Operating Temperature [Min]	0 °C
Output Type	3-State
Package / Case	20-DIP
Package / Case	7.62 mm
Package / Case	0.3 in
Supplier Device Package	20-PDIP
Voltage - Supply [Max]	5.5 V
Voltage - Supply [Min]	4.5 V

SN74ALS645A Series

Octal Bus Transceivers With 3-State Outputs

Part	Supplier Device Package	Number of Elements	Output Type	Package / Case	Package / Case	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Current - Output High, Low [custom]	Current - Output High, Low [custom]	Voltage - Supply [Min]	Voltage - Supply [Max]	Number of Bits per Element	Package / Case [y]	Package / Case [y]
Texas Instruments SN74ALS645ANSR	20-SO	1	3-State	20-SOIC	0.209 "	5.3 mm	70 °C	0 °C	Surface Mount	15 mA	24 mA	4.5 V	5.5 V	8
Texas Instruments SN74ALS645A-1DW	20-SOIC	1	3-State	20-SOIC			70 °C	0 °C	Surface Mount	15 mA	24 mA	4.5 V	5.5 V	8	0.295 in	7.5 mm
Texas Instruments SN74ALS645ADWR	20-SOIC	1	3-State	20-SOIC			70 °C	0 °C	Surface Mount	15 mA	24 mA	4.5 V	5.5 V	8	0.295 in	7.5 mm
Texas Instruments SN74ALS645ADB
Texas Instruments SN74ALS645AN	20-PDIP	1	3-State	20-DIP	0.3 in	7.62 mm	70 °C	0 °C	Through Hole	15 mA	24 mA	4.5 V	5.5 V	8
Texas Instruments SN74ALS645ADW	20-SOIC	1	3-State	20-SOIC			70 °C	0 °C	Surface Mount	15 mA	24 mA	4.5 V	5.5 V	8	0.295 in	7.5 mm
Texas Instruments SN74ALS645A-1DWR	20-SOIC	1	3-State	20-SOIC			70 °C	0 °C	Surface Mount	15 mA	24 mA	4.5 V	5.5 V	8	0.295 in	7.5 mm

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 2.74
		20	$ 2.46
		40	$ 2.32
		100	$ 1.98
		260	$ 1.86
		500	$ 1.62
		1000	$ 1.35
		2500	$ 1.25
		5000	$ 1.21
Texas Instruments	TUBE	1	$ 2.37
		100	$ 1.96
		250	$ 1.41
		1000	$ 1.06

Description

General part information

SN74ALS645A 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 on the level at the direction-control (DIR) input. The output-enableinput can be used to disable the device so that the buses are effectively isolated.

The -1 version of the SN74ALS645A is identical to the standard version, except that the recommended maximum IOLis increased to 48 mA. There is no -1 version of the SN54ALS645A.

The SN54ALS645A and SN54AS645 are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS645A and SN74AS645 are characterized for operation from 0°C to 70°C.

Documents

Technical documentation and resources

Octal Bus Transceivers With 3-State Outputs datasheet

Data sheet