Pinout
SpecificationsSupply voltage, VCC+ (see Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . .7 V
Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . .7 V
Differential input voltage, VID (see Note 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . .±6 V
Common-mode input voltage, VIC (see Note 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±5 V
Strobe input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.5 V
Continuous total dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .See Dissipation Rating Table
Operating free-air temperature range, TA:SN55' . . . . . . . . . . . . . . . . . . . .55°C to 125°C
SN75' . . . . . . . . . . . . . . . . . . . . . . . .0°C to 70°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65°C to 150°C
Case temperature for 60 seconds, Tc: FK package . . . . . . . . . . . . . . . . . . . . . . . . .. . . .260°C
Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: J package . . . . . . . .300°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D, N, or W package ..260°C
NOTES: 3. All voltage values, except differential voltages, are with respect to network ground terminal.
4. Differential voltage values are at the noninverting (A) terminal with respect to the inverting (B) terminal.
5. Common-mode input voltage is the average of the voltages at the A and B inputs.DescriptionThese circuits of SN55107A, SN55107B, SN55108A, and SN55108B are TTL-compatible, high-speed line receivers. Each is a monolithic dual circuit featuring two independent channels. They are designed for general use as well as such specific applications as data comparators and balanced, unbalanced, and party-line transmission systems. SN55107A, SN55107B, SN55108A, and SN55108B are unilaterally interchangeable
with and are replacements for the SN55107, SN55108, SN75107, and SN75108, but offer diode-clamped strobe inputs to simplify circuit design.
The essential difference between the A and B versions can be seen in the schematics. Input-protection diodes are in series with the collectors of the differential-input transistors of the B versions. SN55107A, SN55107B, SN55108A, and SN55108B 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 possibly have the transmission lines biased to some potential greater than 1.4 V.
The SN55107A, SN55107B, SN55108A, and SN55108B are characterized for operation over the full military temperature range of 55°C to 125°C. The SN75107A, SN75107B, SN75108A, and SN75108B are characterized for operation from 0°C to 70°C.
SN55108A Data Sheet
