Features: • Bidirectional Bus Transceivers in High-Density 20-Pin Packages• True Logic• 3-State Outputs• Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPsPinoutSpecificationsSupply ...
SN54ALS645A: Features: • Bidirectional Bus Transceivers in High-Density 20-Pin Packages• True Logic• 3-State Outputs• Package Options Include Plastic Small-Outline (DW) Packages, Ceramic ...
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Features: PinoutSpecificationsDescriptionThe SN54/74LS147 and SN54/74LS148 are Priority Encoders. ...
PinoutDescriptionThe LS155 and LS156 are Dual 1-of-4 Decoder/Demultiplexers with common Address in...

These octal bus transceivers SN54ALS645A and SN54AS645 are designed for asynchronous two-way communication between data buses. SN54ALS645A and SN54AS645 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-enable (OE) input 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 IOL is 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.