SN55107A, SN75107A, SN75107B, SN75108A

DUAL LINE RECEIVERS

SLLS069D – JANUARY 1977 – REVISED APRIL 1998

16

POST OFFICE BOX 655303

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