78P2352-IELR/F View Datasheet(PDF) - Unspecified
Part Name
Description
MFG CO.
'78P2352-IELR/F' PDF : 42 Pages View PDF
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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