参数资料
型号: PM4314-RI
厂商: PMC-SIERRA INC
元件分类: 数字传输电路
英文描述: QUAD T1/E1 LINE INTERFACE DEVICE
中文描述: DATACOM, PCM TRANSCEIVER, PQFP128
封装: PLASTIC, QFP-128
文件页数: 44/170页
文件大小: 823K
代理商: PM4314-RI
PM4314 QDSX
DATA SHEET
PMC-950857
ISSUE 5
QUAD T1/E1 LINE INTERFACE DEVICE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
32
In 75
E1 mode, the amplitude of a received pulse at the 1:2 line-coupling
transformer's primary can be in the range from 2.6V to 1.1V (depending on the
length of the cable from the signal source). In this mode, the QDSX can receive
signal levels down to a squelching level of 220mV which means that there is
14.0 dB margin between the minimum expected signal level and the minimum
receivable signal level in the worst case.
The RSLC block provides a squelching circuit, which indicates an alarm when
input pulses are below the squelching level threshold. In this state, data is not
sliced, which prevents the detection of noise on an idle transmission line. The
SQ status bit in the RSLC Interrupt Enable/Status registers (031H, 071H, 0B1H,
and 0F1H) goes high whenever the RSLC block is squelching the input signal.
The RSLC can be configured to generate an interrupt whenever the SQ status bit
changes state.
The off-chip attenuator pad network is shown in Figure 6 and the network values
below are recommended for the specified applications:
Table 1
-
Signal Type
Turns
Ratio
(N ± 5%)
R1
(
± 1%)
R2
(
± 1%)
Squelch
Level at
Primary
(mV Typical)
Zo=120
Zo=75
Normal
2
357
121
276
CEPT E1
2
205
95.3
220
2
309
93
227
DSX-1
Bridging
2
0
402
50
Tight tolerances are required on the resistors and turns ratio to meet the return
loss specification.
相关PDF资料
PDF描述
PM4318 OCTAL E1/T1/J1 LINE INTERFACE DEVICE
PM4318-BI OCTAL E1/T1/J1 LINE INTERFACE DEVICE
PM4319 OCTAL T1/E1/J1 Short Haul Line Interface Device
PM4325 Octal Short Haul T1/E1/J1 Low Latency Transport Line Interface
PM4328 Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
相关代理商/技术参数
参数描述
PM43-150M 功能描述:固定电感器 15uH 20% RoHS:否 制造商:AVX 电感:10 uH 容差:20 % 最大直流电流:1 A 最大直流电阻:0.075 Ohms 工作温度范围:- 40 C to + 85 C 自谐振频率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接类型:SMD/SMT 封装 / 箱体:6.6 mm x 4.45 mm
PM43-150M-RC 功能描述:固定电感器 15uH 20% RoHS:否 制造商:AVX 电感:10 uH 容差:20 % 最大直流电流:1 A 最大直流电阻:0.075 Ohms 工作温度范围:- 40 C to + 85 C 自谐振频率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接类型:SMD/SMT 封装 / 箱体:6.6 mm x 4.45 mm
PM4318 制造商:PMC 制造商全称:PMC 功能描述:OCTAL E1/T1/J1 LINE INTERFACE DEVICE
PM43-180M 功能描述:固定电感器 18 UH 4X4.5X3.2 MM RoHS:否 制造商:AVX 电感:10 uH 容差:20 % 最大直流电流:1 A 最大直流电阻:0.075 Ohms 工作温度范围:- 40 C to + 85 C 自谐振频率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接类型:SMD/SMT 封装 / 箱体:6.6 mm x 4.45 mm