Datasheet

SN75140
DUAL LINE RECEIVER
SLLS080C – JANUARY 1977 – REVISED APRIL 1998
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
R
T
(50 Ω to 100 Ω
depending on line impedance)
1/2 SN75453B
1/2 SN75140
V
CC
= 5 V
V
ref
= 1.5 V to 3.5 V
Data Out Strobe
Data Out
Data In Strobe
Data In
Data Bus
5 V
V
CC
= 5 V
NOTE A: Using this arrangement, as many as 100 transceivers can be connected to a single data bus. The adjustable reference-voltage feature
allows the noise margin to be optimized for a given system. The complete dual bus transceiver (SN75453B driver and SN75140
receiver) can be assembled in approximately the same space required by a single 16-pin package and only one power supply is
required (5 V). Data in and data out are TTL compatible.
5 V
Figure 5. Dual Bus Transceiver
Signal Input
TTL Output
Strobe
V
CC
= 5 V
R1
R
F
R
T
1/2 SN75140
Figure 6. Schmitt Trigger