Product Summary

The DM74LS245N is a TRI-STATE Octal Bus Transceiver. The DM74LS245N is designed for asynchronous two-way communication between data buses. The control function implementation minimizes external timing requirements. The DM74LS245N allows data transmission from the A bus to the B bus or from the B bus to the A bus depending upon the logic 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.

Parametrics

DM74LS245N absolute maximum ratings: (1)Supply Voltage: 7V; (2)Input Voltage DIR or G: 7V; (3)A or B: 5.5V; (4)Operating Free Air Temperature Range: 0℃ to +70℃; (5)Storage Temperature Range: -65℃ to +150℃.

Features

DM74LS245N features: (1)Bi-Directional bus transceiver in a high-density 20-pin package; (2)TRI-STATE outputs drive bus lines directly; (3)PNP inputs reduce DC loading on bus lines; (4)Hysteresis at bus inputs improve noise margins; (5)Typical propagation delay times, port-to-port 8 ns; (6)Typical enable/disable times 17 ns; (7)Alternate Military/Aerospace device (54LS245) is available. Contact a National Semiconductor Sales Office/Distributor for specifications.

Diagrams

DM74LS245N block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
DM74LS245N
DM74LS245N

Fairchild Semiconductor

Bus Transceivers Oct 3-STATE Bus Tran

Data Sheet

Negotiable 
Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
DM7400
DM7400

Other


Data Sheet

Negotiable 
DM7400N
DM7400N

Fairchild Semiconductor

IC GATE NAND QUAD 2INP 14-DIP

Data Sheet

Negotiable 
DM7401
DM7401

Other


Data Sheet

Negotiable 
DM7402
DM7402

Other


Data Sheet

Negotiable 
DM7402N
DM7402N


IC GATE NOR QUAD 2INP 14-DIP

Data Sheet

Negotiable 
DM7403
DM7403

Other


Data Sheet

Negotiable