DM74LS245

Features:

 Bi-Directional bus transceiver in a high-density 20-pin package
 3-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 enable/disable times 17 ns
 IOL (sink current)24 mA
 IOH (source current) -15 mA


Specifications

Supply Voltage                                                                       7V
Input Voltage
          DIR or G                                                                         7V
          A or B                                                                         5.5V
Operating Free Air Temperature Range                0°C to +70°C
Storage Temperature Range                           -65°C to +150°C


Description

   These DM74LS245 octal bus transceivers are designed for asynchro-nous two-way communication between data buses. The control function implementation minimizes external timing requirements.

   The DM74LS245 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.