Octal Bus Transceiver
DM74LS645 Octal Bus Transceiver
August 1986 Revised March 2000
DM74LS645 Octal Bus Transceiver
General Description
The...
Description
DM74LS645 Octal Bus Transceiver
August 1986 Revised March 2000
DM74LS645 Octal Bus Transceiver
General Description
These octal bus transceivers are designed for asynchronous two-way communication between data buses. The 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 enable input (G) can be used to disable the device so that the buses are effectively isolated.
Features
s Bi-directional bus transceivers in high-density 20-pin packages s Hysteresis at bus inputs improves noise margins s 3-STATE outputs
Ordering Code:
Order Number DM74LS645WM DM74LS645N Package Number M20B N20A Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Function Table
Control Inputs G L L H
H = HIGH Level L = LOW Level X = Irrelevant
DM74LS645 DIR L H X B data to A bus A data to B bus Isolation
© 2000 Fairchild Semiconductor Corporation
DS009056
www.fairchildsemi.com
DM74LS645
Absolute Maximum Ratings(Note 1)
Supply Voltage Input Voltage Operating Free Air Temperature Range Storage Temperature Range 7V 7V 0°C to +70°C −55°C to +150°C
Note 1: The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device s...
Similar Datasheet