DM54LS245

Features:

Bi-Directional bus transceiver in a high-density 20-pin package
TRI-STATE outputs drive bus lines directly
PNP inputs reduce DC loading on bus lines
Hysteresis at bus inputs improve noise margins
Typical propagation delay times port-to-port 8 ns
Typical enabledisable times 17 ns
I_OL (sink current)
         54LS 12 mA
         74LS 24 mA
I_OH (source current)
         -54LS 12 mA
         -74LS 15 mA
Alternate MilitaryAerospace device (54LS245) is available Contact a National Semiconductor Sales Office Distributor for specifications


Specifications

SupplyVoltage .............................................................7V
InputVoltage 
   DIRorG ......................................................................7V
   AorB .......................................................................5.5V
Operating Free Air Temperature Range
     DM54LSand54LS..................................- 55to +125
     DM74LS..................................................... 0to+ 70
StorageTemperatureRange.......................- 65to +150


Description

These DM54LS245 octal bus transceivers are designed for asynchro- nous two-way communication between data buses The
control function implementation minimizes external timing requirements

The DM54LS245 device 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