Bidirectional Bus Transceiver
Interface between TTL/MOS logic and IEEE Standard Instrumentation Bus
- Power Supply Voltage: 7.0Vdc
- Input Voltage: 5.5Vdc
- Driver Output Current: 150mA
- Junction Temperature: 150°C
- Operating Ambient Temperature Range: 0 to +70°C
- Storage Temperature Range: -65 to +150°C
- Package Includes: 1 X MC3448 Quad Three-State Bus Transceiver IC DIP-16 Package
Top Features:
- Four Independent Driver/Receiver Pairs
- Three-Stats Outputs
- High Impedance Inputs
- Receiver Hysteresis-600 mV (Typ)
This bidirectional bus transceiver serves as the interface between TTL or MOS logic and the IEEE Standard Instrumentation Bus (488-1978, often referred to as GPIB). The required bus termination is internally provided. Each driver/receiver pair forms the complete interface between the bus and an instrument. Either the driver or the receiver of each channel is enabled by its corresponding Send/Receive input with the disabled output of the pair forced to a high impedance state. An additional option allows the driver outputs to be operated in an open collector(1) or active pull-up configuration. The receivers have input hysteresis to improve noise margin, and their input loading follows the bus standard specifications.
An essential feature of this transceiver is the fast propagation times of 15-20 ns (Typ) and TTL compatible receiver outputs. The single +5 Volt supply ensures efficient operation. Moreover, the open collector driver output option provides flexibility in usage. The transceiver also includes power up/power down protection to prevent invalid information transmission to the bus and ensures no bus loading when power is removed from the device.
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Images are for illustration only; actual product may vary.