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| 型號： | SP336EEY-L/TR |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 1/30頁 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS232/485 PROG 28TSSOP |
| 產(chǎn)品變化通告： | Packaging Change 15/Jul/2010 |
| 標(biāo)準(zhǔn)包裝： | 1,500 |
| 類型： | 收發(fā)器 |
| 驅(qū)動器/接收器數(shù)： | 4/4 |
| 規(guī)程： | RS232，RS422，RS485 |
| 電源電壓： | 3.3 V，5 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 28-TSSOP |
| 包裝： | 帶卷 (TR) |
| 配用： | 1016-1140-ND - EVAL BOARD FOR SP336EEY |
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Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com
SP336E
3.3V / 5V PROGRAMMABLE RS-232/RS-485/RS-422 SERIAL TRANSCEIVER
JANUARY 2011
REV. 1.0.1
GENERAL DESCRIPTION
The SP336E is a monolithic serial multi-transceiver
device that contains both RS-232 and RS-485/RS-
422 line drivers and receivers. The configuration of
the SP336E can be reconfigured into eight operating
modes including RS-232 only (4TX/4RX), RS-485/
RS-422 only (2TX/2RX) full or half duplex, two RS-
232/RS-485 mixed modes. two shutdown modes and
a diagnostic loop-back mode. Modes may be
selected at any time by changing the logic state of the
three MODE pins. The device can implement a dual-
mode serial port, mixed mode ports or as an interface
signal translator. The Exar charge pumps deliver true
RS-232 driver output voltages from a single power
supply at either 3.3V or 5V. The SP336E requires
only four 0.1
μF capacitors for charge pump. A slew
rate control pin configures driver outputs for either
high data rate or slew-controlled data rates. Slew-
controlled outputs minimize problems with reflections
and ringing on long or un-terminated cables. All RS-
485 receivers or transceivers feature high impedance
which allow up to 256 transceivers on a shared bus.
When configured in RS-485/RS-422 mode, each
driver may be individually enabled or put into tri-state,
simplifying use on shared buses or bidirectional
communication. All receivers have advanced failsafe
protection to prevent oscillation when inputs are un-
connected. In RS-232 mode each receiver input has
a 5k ohm pull-down to ground. Differential Receivers
will default to output logic 1 if inputs are floating,
shorted or open but terminated. All driver outputs and
receiver inputs are protected against ESD strikes up
to +/-15,000 volts.
FEATURES
3.3V or 5V Single Supply Operation
Robust +/-15kV ESD Protection (IEC 61000-4-2 Air
Gap)
Software Selectable Mode Selection
Up to 4 Drivers, 4 Receivers RS-232/V.28
Up to 2 Drivers, 2 Receivers RS-485/RS-422
■ Full or Half Duplex Configurations
■ 1/8th Unit Load, up to 256 receivers on bus
Mixed RS-232/RS-485 modes
Pin Programmable Slew Rate for Reduced EMI
RS-485 Advanced Failsafe on Open, Short or
Terminated Lines
Diagnostic Loop-Back Function
28 Pin SOIC or TSSOP Packaging
TYPICAL APPLICATIONS
Factory Automation Equipment
Security Networks
Industrial/Process Control Networks
Point-Of-Sales Equipment
Gaming Machines
Serial Protocol Translators (ex. RS-232 to RS-485/
RS-422)
Embedded Industrial PC’s
Building Environmental Control Systems (ex.
HVAC)
Cable Repeaters / Port Extenders / Hubs
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