70P2352-IGT Ver la hoja de datos (PDF) - Unspecified

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70P2352-IGT

Dual Channel OC-3/ STM1-E/ E4 LIU

Unspecified 

78P2352

Dual Channel

OC-3/ STM1-E/ E4 LIU

PIN DESCRIPTION (CONTINUED)

CONTROL PINS (continued)

NAME

TXOUT1

TXOUT0

TXPD

SPSL

CKSL

PIN TYPE DESCRIPTION

Advanced Tx Control 1:

1

CIT

Low: Enables fixed LVPECL equalizer at the transmit inputs SIDP/N for

FR4 trace lengths up to 1.5m.

Float: Normal operation

High: Normal operation

Advanced Tx Control 0:

2

CIT

Low: Nominal amplitude

Float: 5% amplitude boost

High: 10% amplitude boost

Transmitter Power Down:

14

CID

When high, powers down and tr-states the transmitt driver on both channels.

Serial Port Selection:

77

CID

When high, chip is software controlled through the serial port.

Reference Clock Frequency Selection:

Selects the reference frequency that is supplied at the CKREFP/N pins. Its

level is read in only at power-up or on the rising edge of a reset signal at the

81

CIT PORB pin.

• Low: 19.44MHz or 17.408MHz

• Float: 77.76MHz

• High: 155.52MHz or 139.264MHz

Page: 20 of 42

2006 Teridian Semiconductor Corporation

Rev. 2.4

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