参数资料
型号: DS21348T
厂商: DALLAS SEMICONDUCTOR
元件分类: Digital Transmission Interface
英文描述: DATACOM, PCM TRANSCEIVER, PQFP44
封装: TQFP-44
文件页数: 6/67页
文件大小: 339K
代理商: DS21348T
DS21348/Q348
14 of 67
Acronym
Pin
I/O
Description
TPD
13
I
Transmit Power Down.
0 = normal transmitter operation
1 = powers down the transmitter and tri-states the TTIP and TRING
pins
TPOS
41
I
Transmit Positive Data. Sampled on the falling edge (CCR2.1 = 0)
or the rising edge (CCR2.1 = 1) of TCLK for data to be transmitted
out onto the line.
TTIP/
TRING
34/
37
O
Transmit Tip and Ring [TTIP & TRING]. Analog line driver
outputs. These pins connect via a step-up transformer to the line.
See Section 7 for details.
TX0/
TX1
14/
15
I
Transmit Data Source Select Bits 0 & 1 [H/W Mode]. These
inputs determine the source of the transmit data. See Table 4-5.
VDD
21/
36
-
Positive Supply. 3.3 volts +/-5%.
VSM
20
I
Voltage Supply Mode. Should be tied low for 3.3V operation.
VSS
22/
35
-
Signal Ground.
WR*
(R/W*)
3I
Write Input (Read/Write).
WR* is an active low signal. See the
Bus Timing Diagrams in section 12.
NOTES:
1. Serial Port Mode pins are double underlined and Hardware Mode pins are single underlined.
2. G.703 requires an accuracy of +/-50 ppm for both T1 and E1. TR62411 and ANSI specs require an
accuracy of +/- 32 ppm for T1 interfaces.
3. * Denotes active low.
相关PDF资料
PDF描述
DS21348TN DATACOM, PCM TRANSCEIVER, PQFP44
DS21348G DATACOM, PCM TRANSCEIVER, BGA49
DS21Q348N DATACOM, PCM TRANSCEIVER, PBGA144
DS21Q348 DATACOM, PCM TRANSCEIVER, PBGA144
DS21352L DATACOM, PCM TRANSCEIVER, PQFP100
相关代理商/技术参数
参数描述
DS21348T+ 功能描述:网络控制器与处理器 IC 3.3V E1/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
DS21348TB 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
DS21348TN 功能描述:网络控制器与处理器 IC 3.3V E1/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
DS21348TN+ 功能描述:网络控制器与处理器 IC 3.3V E1/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
DS21348TNB 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