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参数资料
| 型号： | LXT6155LE |
| 元件分类： | 通信、网络模块及开发工具 |
| 英文描述： | Telecomm/Datacomm |
| 中文描述： | 电信/数据通信 |
| 文件页数： | 10/48页 |
| 文件大小： | 1105K |
| 代理商： | LXT6155LE |
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Intel
LXT6155 155 Mbps SDH/SONET/ATM Transceiver
10
Datasheet
16
17
18
19
TPID7/TXTRIM3
TPID6/TXTRIM2
TPID5/TXTRIM1
TPID4/TXTRIM0
DI
TTL
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 Intel
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.
20
TPID3/TXTRIMENA
DI
TTL
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 Intel
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.
21
22
23
TPID2
TPID1
TPID0
DI
TTL
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 Intel
LXT6155 is used in serial mode.
24
TPICLK
DI
TTL
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.
25
VCC
S
Power Supply
.
26
RPOCLK
DO
TTL
Receive Parallel Output Clock
. Parallel receive clock as
recovered from received data. The clock is nominally 19.44 MHz,
synchronized with RPOD<7:0>.
27
28
29
30
31
32
33
34
RPOD7
RPOD6
RPOD5
RPOD4
RPOD3
RPOD2
RPOD1
RPOD0
DO
TTL
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.
35
GND
S
Ground
.
36
RSOCLKP
DO
LVPECL
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.
37
RSOCLKN
38
PVCC
S
PECL Buffers Power Supply
.
39
RNEG
DO
LVPECL
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.
40
RPOS
41
RDVCC
S
Receive Digital Power Supply
.
42
RDGND
S
Receive Digital Ground
.
Table 1. Intel
LXT6155 Pin Descriptions (Continued)
Pin #
Symbol
I/O
1
Type
2
Description
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 (5 V tolerant); LVPECL = Low-Voltage positive ECL.
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