MT90710

Preliminary Information

5-4

Figure 2 - Pin Connections

Pin Description

Pin #

Name

Description

Power Supply Ground. Nominally 0 volts.

Positive Power Supply. Nominally 5 volts.

3STo7

Serial, 32 Channel, 2.048 Mb/s Link 7 (Output Type 3). Only channels 9 - 31 are

available for user data transfer (1.474 Mb/s). Channels 0 - 8 (0.576 Mb/s) are reserved

for access to fiber overhead information. Output is active only when the receiver

detects the synchronization pattern on RxDATA input stream; output is high impedance

during loss of synchronization.

4

DOUT8K0

Asynchronous 8 kHz Signal 0 (Output Type 3). Sourced from the far-end DIN8K0

input.

5

DOUT8K1

Asynchronous 8 kHz Signal 1 (Output Type 3). Sourced from the far-end DIN8K1

input.

6

C20o

20.48 MHz Clock (Output Type 3). Derived from transmit PLL 40.96 MHz clock divided

by 2 (see pin 18). Made available for system use.

7NC

No Internal Connection.

8

FBADDR7

Frame Buffer RAM Address Bit 7 (Output Type 2).

9STo6A

Serial, 32 Channel, 2.048 Mb/s Link 6A (Output Type 3). Output is active only when

the receiver detects the synchronization pattern on RxDATA input stream; output is high

impedance during loss of synchronization.

32

14

16

18

20

22

26

28

30

24

54

70

68

66

64

60

58

56

62

74

72

12

NC

VSS

NC

E20i

STi7

STi6B

STi6A

STi5

STi4

STi3

VDD

STi2

C40i

NC

NC

NC

C4REFo

C4o

VSS

VDD

POR

FBDATA7

C4b

DIN8K0

FBDATA4

DIN32K

VDD

STi0

FBDATA2

VSS

FBDATA3

DIN8K1

FBDATA1

LLED

FBDATA0

RESET

IC

VDD

84 PIN PLCC

VSS

STi1

FBDATA6

FBDATA5