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参数资料
| 型号： | DS2153Q-A7+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 37/60页 |
| 文件大小： | 0K |
| 描述： | IC TXRX E1 1-CHIP 5V 44-PLCC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 500 |
| 功能： | 单芯片收发器 |
| 接口： | E1 |
| 电路数： | 1 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 电流 - 电源： | 65mA |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-LCC（J 形引线） |
| 供应商设备封装： | 44-PLCC（16.59x16.59） |
| 包装： | 带卷 (TR) |
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DS2153Q
42 of 60
13.3 Jitter Attenuator
The DS2153Q contains an on-board jitter attenuator that can be set to a depth of either 32 or 128 bits via
the JABDS bit in the Line Interface Control Register (LICR). The 128-bit mode is used in applications
where large excursions of wander are expected. The 32-bit mode is used in delay sensitive applications.
The characteristics of the attenuation are shown in Figure 13-4. The jitter attenuator can be placed in
either the receive path or the transmit path by appropriately setting or clearing the JAS bit in the LICR.
Also, the jitter attenuator can be disabled (in effect, removed) by setting the DJA bit in the LICR. In order
for the jitter attenuator to operate properly, a crystal with the specifications listed in Table 13-4 must be
connected to the XTAL1 and XTAL2 pins.
The jitter attenuator divides the clock provided by the 8.192MHz crystal at the XTAL1 and XTAL2 pins
to create an output clock that contains very little jitter. On-board circuitry will pull the crystal (by
switching in or out load capacitance) to keep it long-term averaged to the same frequency as the incoming
E1 signal. If the incoming jitter exceeds either 120UIP-P (buffer depth is 128 bits) or 28UIP-P (buffer depth
is 32 bits), then the DS2153Q will divide the attached crystal by either 3.5 or 4.5 instead of the normal 4
to keep the buffer from overflowing. When the device divides by either 3.5 or 4.5, it also sets the Jitter
Attenuator Limit Trip (JALT) bit in the Receive Information Register (RIR.5).
Table 13-4. Crystal Selection Guidelines
PARAMETER
SPECIFICATION
Parallel Resonant Frequency
8.192MHz
Mode
Fundamental
Load Capacitance
18pF to 20pF (18.5pF nominal)
Tolerance
±50ppm
Pullability
CL = 10pF, delta frequency = +175ppm to
+250ppm
CL = 45pF, delta frequency = -175ppm to -250ppm
Effective Series Resistance
30
maximum
Crystal Cut
AT
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| DS2154LNA2+ | IC TXRX E1 5V 100-LQFP |
| DS2154L | IC TXRX E1 1CHIP 5V ENH 100-LQFP |
| DS2155LN | IC TXRX T1/E1/J1 1-CHIP 100-LQFP |
| DS2156LN+ | IC TXRX T1/E1/J1 1-CHIP 100-LQFP |
| DS2172T/T&R | IC TESTER BIT ERROR RATE 32-TQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2153QN | 制造商:未知厂家 制造商全称:未知厂家 功能描述:PCM Transceiver |
| DS2153QN-A5 | 功能描述:IC TXRX E1 1-CHIP 5V IND 44-PLCC RoHS:否 类别:集成电路 (IC) >> 接口 - 电信 系列:- 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 06/Feb/2012 标准包装:750 系列:* |
| DS2153QN-A7 | 功能描述:网络控制器与处理器 IC RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS2153QN-A7/T&R | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS2153QN-A7/T&R+ | 制造商:Maxim Integrated Products 功能描述:FRAMER E1/ISDN-PRI/PCM-30 5V 44PLCC - Tape and Reel |
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