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參數(shù)資料
| 型號： | SP3508EB |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 1/36頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVALUATION FOR SP3508 |
| 標準包裝： | 1 |
| 主要目的： | 接口，收發(fā)器，RS-232，RS-449，EIA-530（A），X.21 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | SP3508 |
| 主要屬性： | 內部線路或數(shù)字回路測試 |
| 次要屬性： | 8 個驅動器和 8 個接收器 |
| 已供物品： | 板 |
| 其它名稱： | 1016-1626 |
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Exar Corporation 48720 Kato Road, Fremont CA, 94538 (50)668-707 www.exar.com
SP3508_00_072208
FEATURES
Fast 20Mbps Differential Transmission Rates
Internal Transceiver Termination Resistors
for V. & V.35
Interface Modes:
— RS-232 (V.28)
— EIA-530 (V.0 & V.)
— X.2 (V.)
— EIA-530A (V.0 & V.)
— RS-449/V.36
— V.35 (V.35 & V.28)
(V.0 & V.)
Protocols are Software Selectable with 3-Bit Word
Eight (8) Drivers and Eight (8) Receivers
Termination Network Disable Option
Internal Line or Digital Loopback for Diagnostic Testing
Certified conformance to NET1/NET2 and TBR-1
TBR-2 by TUV Rheinland (TBR2/3045940.00/04)
Easy Flow-Through Pinout
+3.3V Only Operation
Individual Driver and Receiver Enable/Disable Controls
Operates in either DTE or DCE Mode
SP3508
Rugged 3.3V, 20Mbps, 8 Channel Multiprotocol Transceiver
with Programmable DCE/DTE and Termination Resistors
DESCRIPTION
The SP3508 is a monolithic device that supports eight (8) popular serial interface standards
for Wide Area Network (WAN) connectivity. The SP3508 is fabricated using a low power
BiCMOS process technology, and incorporates a regulated charge pump allowing +3.3V only
operation. Exar's patented charge pump provides a regulated output of +5.5V, 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 SP3508 requires no additional external components for compliant operation for all of the
eight (8) modes of operation other than six capacitors used for the internal charge pump. All
necessary termination is integrated within the SP3508 and is switchable when V.35 drivers
and V.35 receivers, or when V. receivers are used. The SP3508 provides the controls and
transceiver availability for operating as either a DTE or DCE.
Additional features with the SP3508 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 SP3508 also includes a latch enable
pin with the driver and receiver address decoder. The internal V. or V.35 termination can
be switched off using a control pin (TERM_OFF) for monitoring applications. All eight (8)
drivers and receivers in the SP3508 include separate enable pins for added convenience.
The SP3508 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.
APPLICATIONS
Router
Frame Relay
CSU
DSU
PBX
Secure Communication Terminals
Now Available in Lead Free Packaging
Refer to page 9 for pinout
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