PinoutSpecificationsSupply voltage, VCC+ (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 VSupply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 VDifferential input voltage, VID (see Note 2) . . . . . ....
SN75207: PinoutSpecificationsSupply voltage, VCC+ (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 VSupply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . ....
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The SN75207 and SN75207B are terminal-for-terminal replacements for the SN75107A and SN75107B, respectively. The improved input sensitivity makes them more suitable for MOS memory sense amplifiers and can result in faster memory cycles. Improved sensitivity also makes them more useful in line-receiver applications by allowing use of longer transmission line lengths. The '207 and '207B each features a TTL-compatible, active-pullup output.
The essential difference between the SN75207 and SN75207B can be seen in the schematics. 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: