SN75140

DUAL LINE RECEIVER

SLLS080C – JANUARY 1977 – REVISED APRIL 1998

6

POST OFFICE BOX 655303

APPLICATION INFORMATION

RT (50 Ω to 100 Ω

depending on line impedance)

1/2 SN75453B

1/2 SN75140

VCC = 5 V

Vref = 1.5 V to 3.5 V

Data Out Strobe

Data Out

Data In Strobe

Data In

Data Bus

5 V

VCC = 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

VCC = 5 V

R1

RF

RT

1/2 SN75140

Figure 6. Schmitt Trigger