TLK2501

1.5 TO 2.5 GBPS TRANSCEIVER

SLLS427D − AUGUST 2000 − REVISED JULY 2003

22

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

APPLICATION INFORMATION

_

+

RXP

RXN

VDD

TXN

Rt

VDD

TXP

VDD

200

Ω

820

Ω

Data

Data

Preemphasis = 21 mA

(See Note A)

De-Emphasis = 19 mA

TRANSMITTER

MEDIA

RECEIVER

0.01

µF

0.01

µF

Rt

Rt

Rt

V(term)

V(term)

V(term)

Transmission

Line

Transmission

Line

NOTE A: This assumes RREF = 200

Ω and termination resistance = 50 Ω. See Figure 14 and section choosing RREF resistor values for more

information.

Figure 16. High-Speed I/O AC-Coupled Mode