参数资料
| 型号： | DS2149Q+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 31/32页 |
| 文件大小： | 0K |
| 描述： | IC LIU T1/J1 5V 28-PLCC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 37 |
| 类型： | 线路接口装置（LIU） |
| 规程： | T1/J1 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-LCC（J 形引线） |
| 供应商设备封装： | 28-PLCC（11.51x11.51） |
| 包装： | 管件 |
| 产品目录页面： | 1429 (CN2011-ZH PDF) |
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DS2149
8 of 32
PIN
NAME
I/O
FUNCTION
17
L3
I
LBO3. LBO0 through LBO3 are used to select transmitter output pulse, and receiver
gain.
18
NLOOP
O
Network Loopback Active. Output high when RLB is activated by in-band loop-up
command present for 5 seconds. Output is reset when RLP is deactivated by in-band
loop-down command present for 5 seconds. Activation of remote loopback through
hardware pin 26 or control bit RLB releases the NLOOP output.
19/
20
RTIP/
RRING
I
Receive Tip and Ring. Analog inputs for clock recovery circuitry. These pins connect
through a 1:1 transformer to the line (Section 6).
21
VDD
—
Positive Supply. 5V ±5%. See also VSM pin 10.
22
VSS
—
Signal Ground
L0
LBO0. LBO0 through LBO3 are used to select transmitter output pulse, and receiver
gain.
23
INT
I/O
INT. Used to alert the host when one or more bits are set in the status register.
L1
LBO1. LBO0 through LBO3 are used to select transmitter output pulse, and receiver
gain.
24
SDI
I
Serial Data Input. Input for serial address and data stream. Sampled on rising of
SCLK.
L2
LBO2. LBO0 through LBO3 are used to select transmitter output pulse, and receiver
gain.
25
SDO
O
Serial Data Output. Updated on falling edge of SCLK if CLKE is connected high.
Updated on rising edge of SCLK if CLKE is connected low. SDO is high-Z during
write cycle or when CS is high.
RLB
Remote Loopback. Used to invoke remote loopback. When held high, the transmitter
inputs are ignored and inbound data received at RTIP and RRING is routed to the
transmitter outputs, TTIP and TRING and transmitted at the inbound recovered clock
rate.
NLB
Network Loopback. Enables network loopback detection when RLB floats.
26
CS
I2
Chip Select. Must be low to read or write to the device.
CS is an active-low signal.
LLB
Local Loopback. Used to invoke local loopback. When held high, digital inputs
TPOS and TNEG are looped back to RPOS and RNEG, through the jitter attenuator
if enabled. Floating this input invokes analog loopback. The analog output signal at
TTIP and TRING is routed to the receive inputs RTIP and RRING.
27
SCLK
I2
Serial Clock Input. Input clock to operate serial port. Max clock rate, 2.048MHz.
TAIS
Transmit AIS. Input high forces transmitter to output unframed all ones. Unavailable
in remote loopback.
QRSS
QRSS. Floating this pin enables QRSS pattern generator and detector. Input low
enables normal transmission of data.
28
CLKE
I2
Clock Edge Select
0 = Update RNEG/RPOS on falling edge of RCLK, SDO updated on rising edge of
SCLK.
1 = Update RNEG/RPOS on rising edge of RCLK, SDO updated on falling edge of
SCLK.
Note 1: G.703 requires an accuracy of ±50ppm for T1. TR62411 and ANSI specifications require an accuracy of ±32ppm for T1 interfaces.
Note 2: Input pins have three operating modes.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2149Q/T&R | 制造商:Maxim Integrated Products 功能描述:5V T1/E1 LIU T&R COMM - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC LINE INTERFACE 5V T1/E1 PLCC |
| DS2149Q/T&R+ | 制造商:Maxim Integrated Products 功能描述:FRAMER J1/T1 5V 28PLCC - Tape and Reel |
| DS2149Q/T&R | 功能描述:网络控制器与处理器 IC 5V T1/J1 Line Interface 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 |
| DS2149Q+ | 功能描述:网络控制器与处理器 IC 5V T1/J1 Line Interface 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 |
| DS2149Q+T&R | 制造商:Maxim Integrated Products 功能描述:FRAMER J1/T1 5V 28PLCC - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC LIU T1/J1 5V 28-PLCC |
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