lxt6155 Intel Corporation, lxt6155 Datasheet - Page 10

• Manufacturer Part Number: lxt6155
• Description: 155 Mbps Sdh/sonet/atm Transceiver
• Manufacturer: Intel Corporation

10
LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver
1. DI = Digital Input; DO = Digital Output; DI/O = Digital Input/Output; AI = Analog Input; AO = Analog Output; AI/O = Analog Input/Output; S=Supply.
2. TTL = Transistor-to-Transistor Logic (5V tolerant); LVPECL = Low-Voltage positive ECL.
Pin #
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
Table 1.
TPID3/TXTRIMENA
TPID7/TXTRIM3
TPID6/TXTRIM2
TPID5/TXTRIM1
TPID4/TXTRIM0
RSOCLKP
RSOCLKN
RPOCLK
RDGND
Symbol
TPICLK
RPOD7
RPOD6
RPOD5
RPOD4
RPOD3
RPOD2
RPOD1
RPOD0
RDVCC
TPID2
TPID1
TPID0
PVCC
RNEG
RPOS
LXT6155 Pin Descriptions (Continued)
GND
VCC
I/O
DO
DO
DO
DO
DI
DI
DI
DI
S
S
S
S
S
1
LVPECL
LVPECL
Type
TTL
TTL
TTL
TTL
TTL
TTL
2
Transmit Parallel Input Data. Transmit data from an Overhead
Terminator at parallel speed 19.44 MHz, clocked in by TPICLK. TPID7 is
the most significant bit, and is the first bit to be sent. These pins should
be grounded or not connected when the LXT6155 is used in serial mode.
Transmit Trim Controls, in serial, hardware, coax mode only. These
pins trim the amplitude of the line driver output from (nom -21%) to (nom
+24%) in 3% steps. This feature is only enabled when pin #20
(TXTRIMENA) is High.
Transmit Parallel Input Data. Transmit data from an Overhead
Terminator at parallel speed 19.44 MHz, clocked in by TPICLK. TPID7 is
the most significant bit, and is the first bit to be sent. These pins should
be grounded or not connected when the LXT6155 is used in serial mode.
Transmit Trim Enable, in serial, hardware, coax mode only. This pin
enables the trimming of the line driver output by pins 16-19 when high.
Transmit Parallel Input Data. Transmit data from an Overhead
Terminator at parallel speed 19.44 MHz, clocked in by TPICLK. TPID7 is
the most significant bit, and is the first bit to be sent. These pins should
be grounded or not connected when the LXT6155 is used in serial mode.
Transmit Parallel Input Clock. Parallel transmit clock at 19.44 MHz.
This pin is disabled when serial mode is selected and should be
grounded or not connected.
Power Supply.
Receive Parallel Output Clock. Parallel receive clock as recovered
from received data. The clock is nominally 19.44 MHz, synchronized with
RPOD<7:0>.
Receive Parallel Output Data. RPOD<7:0> output aligned 8-bit bytes at
RPOCLK clock rate. These pins are to be left open when serial mode is
selected. RPOD7 is the most significant bit, and is the first to arrive.
Ground.
Receive Serial Output Clock. Serial receive clock as recovered from
received data. The clock is nominally 155.52 MHz, synchronized with
output serial data RPOS and RNEG.
PECL Buffers Power Supply.
Receive Serial Output Data, positive and negative. These two pins
provide recovered data synchronized to receive serial output clocks
RSOCLKP and RSOCLKN. These pins are tristated and should be left
open when parallel mode is selected.
Receive Digital Power Supply.
Receive Digital Ground.
Description
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