TLK2701

1.6 TO 2.7 GBPS TRANSCEIVER

SLLS429D − AUGUST 2000 − REVISED MARCH 2008

2

POST OFFICE BOX 655303

description (continued)

The TLK2701 has a loss of signal detection circuit for conditions where the incoming signal no longer has a

sufficient voltage amplitude to keep the clock recovery circuit in lock.

The TLK2701 allows users to implement redundant ports by connecting receive data bus terminals from two

TLK2701 devices together. Asserting the LCKREFN to a low state will cause the receive data bus terminals,

RXD[0:15], RX_CLK, and RKLSB, RKMSB/PRBS_PASS to go to a high-impedance state. This places the

device in a transmit-only mode since the receiver is not tracking the data.

The TLK2701 uses a 2.5 V supply. The I/O section is 3 V compatible. With the 2.5-V supply the chipset is very

power efficient consuming less than 350 mW typically. The TLK2701 is characterized for operation from −40

°C

to 85

°C.

The TLK2701 is designed to be hot plug capable. An on-chip power-on reset circuit holds the RX_CLK low and

goes to high impedance to the parallel side output signal terminals during power up as well as goes to DOUTTXP

and DOUTTXN.

AVAILABLE OPTIONS

PACKAGE

PowerPAD QUAD FLATPACK

(VQFP)

− 40

°C to 85°C

TLK2701IRCP

17 18 19

RXD3

RXD4

RXD5

RXD6

GND

RXD7

RX_CLK

RXD8

RXD9

RXD10

RXD11

RXD12

RXD13

GND

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

20

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

TXD3

TXD4

TXD5

GND

TXD6

TXD7

GTX_CLK

TXD8

TXD9

TXD10

GND

TXD11

TXD12

TXD13

21 22 23 24

63 62 61 60 59

64

58

56 55 54

57

25 26 27 28 29

53 52 51 50 49

30 31 32

RCP PACKAGE

(TOP VIEW)