SLK2501

OC48/24/12/3 SONET/SDH MULTIRATE TRANSCEIVER

SLLS502A – OCTOBER 2001 – REVISED NOVEMBER 2001

6

POST OFFICE BOX 655303

Terminal Functions(Continued)

control/status pins (continued)

TERMINAL

TYPE

DESCRIPTION

NAME

NO.

TYPE

DESCRIPTION

PRBSPASS

42

TTL output

PRBS test result. This pin reports the status of the PRBS test results (High = pass).

When PRBSEN is disabled, the PRBSPASS pin is set low. When PRBSEN is enabled

and a valid PRBS is received, then the PRBSPASS pin is set high.

PAR_VALID

2

TTL output

Parity checker output. The internal parity checker on the parallel side of the transmitter

checks for even parity. If there is a parity error, the pin is pulsed low for two clock cycles.

SPILL

49

TTL output

TX FIFO collision output

voltage supply and reserved pins

TERMINAL

TYPE

DESCRIPTION

NAME

NO.

TYPE

DESCRIPTION

VDDLVDS

62, 72, 75, 78,

90, 91, 92, 97

Supply

LVDS supply voltage (2.5 V)

GNDLVDS

61, 69, 76, 77,

89, 93, 96, 100

Ground

LVDS ground

VDD

3, 22, 25, 29,

32, 35, 50

Supply

Digital logic supply voltage (2.5 V)

GND

1, 6, 19, 23, 26,

28, 30, 31, 33,

40

Ground

Digital logic ground

VDDA

7, 16

Supply

Analog voltage supply (2.5 V)

GNDA

10, 13

Ground

Analog ground

VDDPLL

11

Supply

PLL voltage supply (2.5 V)

GNDPLL

12

Supply

PLL ground

RSVD

52

Reserved

This pin needs to be tied to ground or left floating for normal operation.