参数资料
型号: XRT91L31IQ-F
厂商: Exar Corporation
文件页数: 38/41页
文件大小: 0K
描述: IC TXRX SONET/SDH 8BIT 64QFP
标准包装: 1
类型: 收发器,多路复用器
PLL:
主要目的: 以太网,SONET/SDH
输入: LVCMOS,LVPECL,LVTTL
输出: LVCMOS,LVPECL,LVTTL
电路数: 1
差分 - 输入:输出: 是/是
频率 - 最大: 622.08MHz
电源电压: 3.135 V ~ 3.465 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 64-FQFP
供应商设备封装: 64-PQFP(10x10)
包装: 托盘
其它名称: 1016-1361
XRT91L31
6
STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
REV. 1.0.2
PIN DESCRIPTIONS
TABLE 2: HARDWARE CONTROL
PIN DESCRIPTION
NAME
LEVEL
TYPE
PIN
DESCRIPTION
RESET
LVTTL,
LVCMOS
I
1
Master Reset Input
Active "High." When this pin is pulled "High" , the internal state
machines are set to their default state.
"Low" = Normal Operation
"High" = Master Hardware Reset
STS12/STS3
LVTTL,
LVCMOS
I
59
Data Rate Selection
Selects SONET/SDH transmission and reception speed rate
"Low" = STS-3/STM-1 155.52 Mbps
"High" = STS-12/STM-4 622.08 Mbps
CMUFREQSEL
LVTTL,
LVCMOS
I
3
Clock Multiplier Unit Reference Frequency Select
This pin is used to select the frequency of the REFCLKP/N or
TTLREFCLK input to the CMU.
"Low" = 77.76 MHz reference clock
"High" = 19.44 MHz reference
clock
NOTE: REFCLKP/N or TTLREFCLK input should be generated
from an LVPECL/LVTTL crystal oscillator which has a
frequency accuracy better than 20ppm in order for the
transmitted data rate frequency to have the necessary
accuracy required for SONET systems..
CDR_BW/VDD
LVTTL,
LVCMOS
I
15
CDR Bandwidth Select
This pin is used to select the CDR Bandwidth
"Low" = Narrow BW, (Meets SONET jitter transfer requirement)
"High" (VDD) = Wide Band Width.
CMU-
FREQSEL
STS12/
STS3
REFCLKP/N OR
TTLREFCLK
REFERENCE
FREQUENCY
DATA RATE
00
77.76 MHz
STS-3/STM-1
155.52 Mbps
0
1
77.76 MHz
STS-12/STM-4
622.08 Mbps
10
19.44 MHz
STS-3/STM-1
155.52 Mbps
1
19.44 MHz
STS-12/STM-4
622.08 Mbps
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