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Quadruple Bus Transceiver


Package | PIN: N | 16
Temp: C (0 to 70)
Carrier: Partial Tube
Qty Price
1-9 $3.25
10-24 $2.91
25-99 $2.71
100-249 $2.36
250-499 $2.17
500-749 $1.82
750-999 $1.50
1000+ $1.37


  • Single 5-V Supply
  • High-Input-Impedance, High-Threshold Receivers
  • Common Driver Strobe
  • TTL-Compatible Driver and Strobe Inputs With Clamp Diodes
  • High-Speed Operation
  • 100-mA Open-Collector Driver Outputs
  • Four Independent Channels
  • TTL-Compatible Receiver Output

Texas Instruments  SN75138N

The SN55138 and SN75138 quadruple bus transceivers are designed for two-way data communication over single-ended transmission lines. Each of the four identical channels consists of a driver with TTL inputs and a receiver with a TTL output. The driver open-collector output is designed to handle loads up to 100-mA open collector. The receiver input is internally connected to the driver output, and has a high impedance to minimize loading of the transmission line. Because of the high driver-output current and the high receiver-input impedance, a very large number (typically hundreds) of transceivers may be connected to a single data bus.

The receiver design also features a threshold of 2.3 V (typical), providing a wider noise margin than would be possible with a receiver having the usual TTL threshold. A strobe turns off all drivers (high impedance) but does not affect receiver operation. These circuits are designed for operation from a single 5-V supply and include a provision to minimize loading of the data bus when the power-supply voltage is zero.

The SN55138 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN75138 is characterized for operation from 0°C to 70°C.