9

LTC1518/LTC1519

increased skew, this configuration might not operate at the

highest data rates. To transmit single-ended data over

short to medium distances, twisted pair is recommended

with the unused wire grounded at both ends (Figure 7).

Differential Transmission

Data rates up to 52Mbps can be transmitted over 100 feet

of high quality category 5 twisted pair. Figure 8 shows the

LTC1518 receiving differential data from an LTC1685

transceiver. As in the single-ended configurations, care

must be taken to properly terminate the differential data

lines to avoid unwanted reflections, etc.

–

+

1/4

LTC1518

LTC1519

10-FT TWISTED PAIR

MC74ACT04

MC74AC04

0.01

µF

100

Ω

100

Ω

3.3k

5V

5V

1k

1518/19 F07

Figure 7. Medium Distance Single-Ended Transmission

Using a CMOS Driver

100

Ω

A 1

4

EN

EN

RO

1518/19 F08

1/4 LTC1518

LTC1685

LTC1685

12

3

2 B

7

6

3

2

DE

DI

RO

4

1

100

Ω

7

6

3

2

DE

DI

RO

4

1

RE

RE

Figure 8. LTC1518 Connected to LTC1685

High Speed RS485 Transceiver