SN55107A, SN75107A, SN75107B, SN75108A
DUAL LINE RECEIVERS
SLLS069D – JANUARY 1977 – REVISED APRIL 1998
16
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
repeaters for long lines
In some cases, the driven line may be so long that the noise level on the line reaches the common-mode limits
or the attenuation becomes too large and results in poor reception. In such a case, a simple application of a
receiver and a driver as repeaters [shown in Figure 19(a)] restores the signal level and allows an adequate
signal level at the receiving end. If multichannel operation is desired, then proper gating for each channel must
be sent through the repeater station using another repeater set as in Figure 19(b).
Driver
Strobe
Ckt
P
Receiver
P
P P
P P
Data In
Clock In
Data Out
(a) SINGLE-CHANNEL LINE
(b) MULTICHANNEL LINE WIDTH WITH STROBE
Repeaters
Data In
Driver
Receiver
Driver
Receiver
Driver
Receiver
Receiver
Driver
Receiver
Data Out
Figure 19. Receiver-Driver Repeaters
receiver as dual differential comparator
There are many applications for differential comparators, such as voltage comparison, threshold detection,
controlled Schmitt triggering, and pulse-width control.
As a differential comparator, a ’107A or SN75108A can be connected to compare the noninverting input terminal
with the inverting input as shown in Figure 20. The output is high or low, resulting from the A input being greater
or less than the reference. The strobe inputs allow additional control over the circuit so that either output, or both,
can be inhibited.
Strobe 1, 2
Reference 1
Reference 2
Strobe 2
Strobe 1
Output 1
Output 2
1A
1B
2A
2B
Figure 20. SN75107A Series Receiver as a Dual Differential Comparator
