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参数资料
| 型号： | CS61884-IB |
| 厂商： | CIRRUS LOGIC INC |
| 元件分类： | 数字传输电路 |
| 英文描述： | Octal T1/E1/J1 Line Interface Unit |
| 中文描述： | DATACOM, PCM TRANSCEIVER, PBGA160 |
| 封装： | FBGA-160 |
| 文件页数： | 25/72页 |
| 文件大小： | 1474K |
| 代理商： | CS61884-IB |
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CS61884
DS485PP4
25
The CS61884 also allows the user to customize the
transmit pulse shapes to compensate for non-stan-
dard cables, transformers, or protection circuitry.
For further information on the AWG Refer to
Ar-
bitrary Waveform Generator
(See Section 15 on
page 43).
For more information on the host mode registers,
refer to
Register Descriptions
(See Section 14 on
page 35).
9.1 Bipolar Mode
Bipolar mode provides transparent operation for
applications in which the line coding function is
performed by an external framing device. In this
mode, the falling edge of TCLK samples NRZ data
onTPOS/TNEGfortransmissiononTTIP/TRING.
9.2 Unipolar Mode
In unipolar mode, the CS61884 is configured such
that transmit data is encoded using B8ZS, HDB3,
or AMI line codes. This mode is activated by hold-
ing TNEG/UBS “High” for more than 16 TCLK
cycles. Transmit data is input to the part via the
TPOS/TDATA pin on the falling edge of TCLK.
When operating the part in hardware mode, the
CODENpin is used to select between B8ZS/HDB3
or AMI encoding. During host mode operation, the
linecoding isselected viathe
GlobalControlReg-
ister (0Fh)
(See Section 14.16 on page 38).
NOTE:
The encoders/decoders are selected for all
eight channels in both hardware and host
mode.
9.3 RZ Mode
In RZ mode, the internal pulse shape circuitry is
bypassed and RZ data driven into TPOS/TNEG is
transmitted on TTIP/TRING. In this mode, the
pulse width of the transmitter output is determined
by
the width
of
the RZ signal
TPOS/TNEG. This mode is entered when MCLK
does not exist and TCLK is held “High” for at least
12
μ
sec.
input
to
9.4 Transmitter Powerdown / High-Z
The transmitters can be forced into a high imped-
ance, low power state by holding TCLK of the ap-
propriate channel low for at least 12
μ
s or 140
MCLK cycles. In hardware and host mode, the
TXOE pin forces all eight transmitters into a high
impedance state within 1
μ
s.
In host mode, each transmitter is individually con-
trollable using the
Output Disable Register (12h)
(See Section 14.19 on page 39). The TXOE pin can
be used in host mode, but does not effect the con-
tents of the Output Enable Register. This feature is
useful in applications that require redundancy.
9.5 Transmit All Ones (TAOS)
When TAOS is activated, continuous ones are
transmitted on TTIP/TRING using MCLK as the
transmit timing reference. In this mode, the TPOS
and TNEG inputs are ignored.
In hardware mode, TAOS is activated by pulling
TCLK “High” for more than 16 MCLK cycles.
Table 5. Hardware Mode Line Length Configuration Selection
LEN[2:0]
000
001
010
011
100
101
110
111
Transmit Pulse Configuration
E1 3.0V / E1 2.37V
DS1, Option A (undershoot)
DS1, Option A (0 dB)
DSX-1: 0-133 ft. (0.6dB)
DSX-1: 133-266 ft. (1.2dB)
DSX-1: 266-399 ft. (1.8dB)
DSX-1: 399-533 ft. (2.4dB)
DSX-1: 533-655 ft. (3.0dB)
Line Z
120
/
75
100
100
100
100
100
100
100
Operation
E1
T1/J1
T1/J1
T1/J1
T1/J1
T1/J1
T1/J1
T1/J1
相关PDF资料 |
PDF描述 |
|---|---|
| CS61884-IQ | Octal T1/E1/J1 Line Interface Unit |
| CS62180A | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| CS62180 | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| CS62180B | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| CS62180B-IL | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| CS61884-IQ | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:Octal T1/E1/J1 Line Interface Unit |
| CS61884-IQZ | 功能描述:网络控制器与处理器 IC IC Octal T1/E1/J1 Line Interface Unit 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 |
| CS61884-IQZR | 功能描述:网络控制器与处理器 IC IC Octal T1/E1/J1 Line Interface Unit 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 |
| CS61884-IRZ | 功能描述:网络控制器与处理器 IC IC Octal T1/E1/J1 Line Interface Unit 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 |
| CS61884-IRZR | 功能描述:网络控制器与处理器 IC IC Octal T1/E1/J1 Line Interface Unit 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 |
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