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SP508E：Rugged 20Mbps, 8 Channel Multi-Protocol Transceiver with Programmable DCE/DTE and Termination Resistors
The SP508E is a monolithic device that supports eight (8) popular serial interface standards for Wide Area Network (WAN) connectivity. The SP508E is fabricated using a low power BiCMOS process technology, and incorporates an Exar regulated charge pump allowing +5V only operation. Exar's patented charge pump provides a regulated output of +5.8V, which will provide enough voltage for compliant operation in all modes. Eight (8) drivers and eight (8) receivers can be configured via software for any of the above interface modes at any time. The SP508E requires no additional external components for compliant operation for all of the eight (8) modes of operation other than four capacitors used for the internal charge pump. All necessary termination is integrated within the SP508E and is switchable when V.35 drivers and V.35 receivers, or when V.11 11 receivers are used. The SP508E provides the controls and transceiver availability for operating as either a DTE or DCE.
Additional features with the SP508E include internal loopback that can be initiated in any of the operating modes by use of the LOOPBACK pin. While in loopback mode, receiver outputs are internally connected to driver inputs creating an internal signal path bypassing the serial communications controller for diagnostic testing. The SP508E also includes a latch enable pin with the driver and receiver address decoder. The internal V.11 11 or V.35 receiver termination can be switched off using a control pin (TERM_OFF) for monitoring applications. All eight (8) drivers and receivers in the SP508E include separate enable pins for added convenience. The SP508E is ideal for WAN serial ports in networking equipment such as routers, access concentrators, network muxes, DSU/CSU's, networking test equipment, and other access devices.
Applicable U.S. Patents-5,306,954; and others patents pending.
技术特性
20Mbps Differential Transmission Rates
1 5kV ESD Tolerance for Analog I/Os
Internal Transceiver Termination Resistors for V.1111/V.35
Interface Modes:
RS-232 (V.28)
EIA-530 (V.10 & V.1111)
X.21 (V.1111)
EIA-530A (V.10 & V.1111)
RS-449/V.36 – V.35 (V.10 & V.1111)
RS-232 (V.28)
EIA-530 (V.10 & V.1111)
X.21 (V.1111)
EIA-530A (V.10 & V.1111)
RS-449/V.36 – V.35 (V.10 & V.1111)
Software Selectable Protocols with 3-Bit Word
Eight Drivers and Eight Receivers
V.35/V.11 11 Receiver Termination Network Disable Option
Internal Line or Digital Loopback Testing
Adheres to NET1/NET2 and TBR-2 Requireme
Easy Flow-Through Pinout
+5V Only Operation
Individual Driver/Receiver Enable/Disable Controls
Operates in DTE or DCE Mode
数据手册S
SP508E Datasheet
应用指南
ANI-14, DTE and DCE Terminology Explained
ANI-16, Design Guide for Multi-Protocol Serial Ports
ANI-17, Multiprotocol DTE and DCE Options
Product Change Notification
三月 2012
六月 2006
十月 2009
五月 2013
十月 2013
十月 2013
十二月 2013
二月 2006
一月 2008
一月 2009
Material Declarations
四月 2015
四月 2015
产品应用
Router
Frame Relay
CSU
DSU
PBX
Secure Communication Terminals
规格 参数
发送器数量(Tx) 8
接收器数量(Rx) 8
数据传输速率(kbps) 20000
电源电压Vcc(V) 5
静电放电ESD(KV) 15
终止 全
支持协议 RS232, RS449,EIA530, EIA530A,V.10, V.11, V.28, V.35, V.36,X.21
说明书 单芯片, 15kV
订购型号
器件型号 封装编码 最低温度 最高温度 状态
SP508ECF-L LQFP100 0 70 PRE
SP508EEF-L LQFP100 -40 85 PRE
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