Plug-In Replacement for SN75107A and
SN75107B With Improved Characteristics
±10-mV Input Sensitivity
TTL-Compatible Circuitry
Standard Supply Voltages . . . ±5 V
Differential Input Common-Mode Voltage
Range of ±3 V
Strobe Inputs for Channel Selection
Totem-Pole Outputs
SN75207B Has Diode-Protected Input Stage
for Power-Off Condition
Sense Amplifier for MOS Memories
Dual Comparator
High-Sensitivity Line Receiver

description
The SN75207B is a terminal-for-terminal replacement for the SN75107B. The improved input sensitivity makes
it more suitable for MOS memory sense amplifiers and can result in faster memory cycles. Improved sensitivity
also makes it more useful in line-receiver applications by allowing use of longer transmission line lengths. The
SN75207B features a TTL-compatible, active-pullup output.
Input protection diodes are in series with the collectors of the differential-input transistors of the SN75207B.
These diodes are useful in certain party-line systems that may have multiple VCC+ power supplies and may be
operated with some of the VCC+ supplies turned off. In such a system, if a supply is turned off and allowed to
go to ground, the equivalent input circuit connected to that supply would be as follows:
This would be a problem in specific systems that might have the transmission lines biased to some potential
greater than 1.4 V.
This device is characterized for operation from 0°C to 70°C.