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SLK2501IPZPG4 Datasheet(PDF) 5 Page - Texas Instruments

Part # SLK2501IPZPG4
Description  OC-48/24/12/3 SONET/SDH MULTIRATE TRANSCEIVER
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

SLK2501IPZPG4 Datasheet(HTML) 5 Page - Texas Instruments

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SLK2501
SLLS502C – OCTOBER 2001 – REVISED MARCH 2007
TERMINAL FUNCTIONS (continued)
TERMINAL
TYPE
DESCRIPTION
NAME
NO.
PS
21
TTL input (with
Polarity select. This pin, used with the SIGDET pin, sets the polarity of SIGSET. When
pulldown)
high, SIGDET is an active low signal. When low, SIGDET is an active high signal.
RX_MONITOR
47
TTL input (with
RX parallel data monitor in repeater mode. This pin is only used when the device is put
pulldown)
under repeater mode. When high, the RX demultiplexer circuit is enabled and the
parallel data is presented. When low, the demultiplexer is shut down to save power.
LCKREFN
24
TTL input (with
Lock to reference. When this pin is low, RXCLKP/N output is forced to lock to REFCLK.
pullup)
When high, RXCLKP/N is the divided down clock extracted from the receive serial data.
LOOPTIME
51
TTL input (with
Loop timing mode. When this pin is high, the PLL for the clock synthesizer is bypassed.
pulldown)
The recovered clock timing is used to send the transmit data.
TESTEN
43
TTL input (with
Production test mode enable. This pin must be left unconnected or tied low.
pulldown)
RATEOUT0
37
TTL output
Autorate detection outputs. When AUTO_DETECT is high, the autodetection circuit
RATEOUT1
36
generates these two bits to indicate the data rates for the downstream device.
LOL
45
TTL output
Loss of lock. When the clock recovery loop has locked to the input data stream and the
phase differs by less than 100 ppm from REFCLK, then LOL is high. When the phase of
the input data stream differs by more than 100 ppm from REFCLK, then LOL is low. If
the difference is too large (> 500 ppm), the LOL output is not valid.
LOS
46
TTL output
Loss of signal. When no transitions appear on the input data stream for more than 2.3
µs, a loss of signal occurs and LOS goes high. The device also transmits all zeroes
downstream using REFCLK as its clock source. When a valid SONET signal is received,
the LOS signal goes low.
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
VDDLVDS
62, 72, 75, Supply
LVDS supply voltage (2.5 V)
78, 90–92,
97
GNDLVDS
61, 69, 76, Ground
LVDS ground
77, 89, 93,
96, 100
VDD
3, 22, 25,
Supply
Digital logic supply voltage (2.5 V)
29, 32, 35,
50
GND
1, 6, 19,
Ground
Digital logic ground
23, 26, 28,
30, 31, 33,
40
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.
5
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