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参数资料
| 型号： | IDT82P2828BHG |
| 厂商： | IDT, Integrated Device Technology Inc |
| 文件页数： | 71/154页 |
| 文件大小： | 0K |
| 描述： | IC LIU T1/J1/E1 28+1CH 640-PBGA |
| 标准包装： | 5 |
| 类型： | 线路接口装置（LIU） |
| 规程： | E1 |
| 电源电压： | 3.13 V ~ 3.47 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 640-BGA 裸露焊盘 |
| 供应商设备封装： | 640-PBGA-EP（31x31） |
| 包装： | 托盘 |
| 其它名称： | 82P2828BHG |
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IDT82P2828
28(+1) CHANNEL HIGH-DENSITY T1/E1/J1 LINE INTERFACE UNIT
Pin Description
23
February 6, 2009
REFA
Output
AK18
REFA: Reference Clock Output A
REFA can output three kinds of clocks: a recovered clock of one of the 29 channels, an exter-
nal clock input on CLKA or a free running clock. The clock frequency is programmable. Refer
to Section 3.6.2 Clock Outputs on REFA/REFB for details.
The output on REFA can also be disabled, as determined by the REFA_EN bit (b6, REFA).
When the output is disabled, REFA is in High-Z state.
REFB
Output
AJ18
REFB: Reference Clock Output B
REFB can output a recovered clock of one of the 29 channels, an external clock input on
CLKB or a free running clock. Refer to Section 3.6.2 Clock Outputs on REFA/REFB for
details.
The output on REFB can also be disabled, as determined by the REFB_EN bit (b6, REFB).
When the output is disabled, REFB is in High-Z state.
CLKA
Input
AH17
CLKA: External T1/E1 Clock Input A
External T1/J1 (1.544 MHz) or E1 (2.048 MHz) clock is input on this pin. The CKA_T1E1 bit
(b5, REFA) should be set to match the clock frequency.
When not used, this pin should be connected to GNDD.
CLKB
Input
AG17
CLKB: External T1/E1 Clock Input B
External T1/J1 (1.544 MHz) or E1 (2.048 MHz) clock is input on this pin. The CKB_T1E1 bit
(b5, REFB) should be set to match the clock frequency.
When not used, this pin should be connected to GNDD.
Common Control
VCOM[0]
VCOM[1]
Output
R4
P28
VCOM: Voltage Common Mode [1:0]
These pins are used only when the receive line interface is in Receive Differential mode and
connected without a transformer (transformer-less).
To enable these pins, the VCOMEN pin must be connected high. Refer to Figure-10 for the
connection.
When these pins are not used, they should be left open.
VCOMEN
Input
(Pull-Down)
AF26
VCOMEN: Voltage Common Mode Enable
This pin should be connected high only when the receive line interface is in Receive Differen-
tial mode and connected without a transformer (transformer-less).
When not used, this pin should be left open.
REF
-
D29
REF: Reference Resistor
An external resistor (10 K
, ±1%) is used to connect this pin to ground to provide a standard
reference current for internal circuit. This resistor is required to ensure correct device opera-
tion.
RIM
Input
(Pull-Down)
AH10
RIM: Receive Impedance Matching
In Receive Differential mode, when RIM is low, all 29 receivers become High-Z and only exter-
nal impedance matching is supported. In this case, the per-channel impedance matching con-
ignored.
In Receive Differential mode, when RIM is high, impedance matching is configured on a per-
This pin can be used to control the receive impedance state for Hitless Protection applica-
tions. Refer to Section 4.4 Hitless Protection Switching (HPS) Summary for details.
In Receive Single Ended mode, this pin should be left open.
Name
I / O
Pin No.
Description
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相关代理商/技术参数 |
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| IDT82P2916 | 制造商:IDT 制造商全称:Integrated Device Technology 功能描述:16-Channel High-Density T1/E1/J1 Line Interface Unit |
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