Datasheet > SP339E

SP339E

更新时间： 2024-11-06 09:10:35

品牌	Logo	应用领域
艾科嘉 - EXAR		/
页数	文件大小	规格书
21页	1114K
描述
RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION

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SP339E 数据手册

SP339E

RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION

OCT 2011

REV. 1.0.0

FEATURES

GENERAL DESCRIPTION

• Pin selectable Cable Termination

The SP339 is an advanced multiprotocol transceiver

supporting RS-232, RS-485, and RS-422 serial

standards in a 40 pin QFN package. Integrated cable

termination and four configuration modes allow all

three protocols to be used interchangeably over a

single cable or connector with no additional switching

components. Full operation requires only four

external charge pump capacitors.

• No external resistors required for RS-485/422

termination and biasing

• 3.3V or 5V Single Supply Operation

• Robust ESD Protection on bus pins

■ ±15kV Human Body Model (HBM)

■ ±8kV IEC 61000-4-2 (Contact)

The RS-485/422 modes feature one driver and one

receiver (1TX/1RX) in both half and full duplex

configurations. The RS-232 mode (3TX/5RX)

provides full support of all eight signals commonly

used with the DB9 RS-232 connector. A dedicated

diagnostic loopback mode is also provided.

• Max Data Rate of 20Mbps in RS-485/422 Modes

and up to 1Mbps in RS-232 Modes

• Pin selectable 250kbps Slew Limiting

• 3 Drivers, 5 Receivers RS-232/V.28

• 1 Driver, 1 Receiver RS-485/422

The high speed drivers operate up to 20Mbps in RS-

485/422 modes, and up to 1Mbps in RS-232 mode.

All drivers can be slew limited to 250kbps in any

mode to minimize electromagnetic interference (EMI).

■ Full and Half Duplex Configuration

■ 1/8th Unit Load, up to 256 receivers on bus

• RS-485/422 Enhanced Failsafe for open, shorted,

All transmitter outputs and receiver inputs feature

robust electrostatic discharge (ESD) protection to

±15kV Human Body Model (HBM) and ±8kV IEC-

61000-4-2 Contact. Each receiver output has full fail-

safe protection to avoid system lockup, oscillation, or

indeterminate states by defaulting to logic-high output

level when the inputs are open, shorted, or

terminated but undriven. No external biasing resistors

are required.

or terminated but idle inputs

• Space saving 6mm x 6mm QFN-40 Package

• Pin compatible with SP338E

TYPICAL APPLICATIONS

The RS-232 receiver inputs include a 5kΩ pull-down

to ground. The RS-485/422 receiver inputs are high

impedance (>96kΩ when termination is disabled),

• Dual Protocol Serial Ports (RS-232 or RS-485/422)

• Industrial Computers

allowing up to 256 devices on

communication bus (1/8th unit load).

single

• Industrial and Process Control Equipment

• Point-Of-Sale Equipment

The SP339E operates from a single power supply,

either 3.3V or 5V, with low idle current (2mA typical in

all modes). The shutdown mode consumes less than

10µA for low power standby operation.

• Networking Equipment

• HVAC Controls Equipment

• Building Security and Automation Equipment

ORDERING INFORMATION

PART NUMBER

SP339EER1-L

PACKAGE

40-pin QFN

OPERATING TEMPERATURE RANGE

-40°C to +85°C

DEVICE STATUS

Active

SP339EER1-L/TR

SP339ECR1-L

-40°C to +85°C

Active

0°C to +70°C

Active

SP339ECR1-L/TR

0°C to +70°C

Active

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com

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与SP339E相关器件

型号	品牌	获取价格	描述	数据表
SP339ECR1-L	EXAR	获取价格	RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
SP339ECR1-L/TR	EXAR	获取价格	RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
SP339ECR1-LTR	EXAR	获取价格	RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
SP339EER1	EXAR	获取价格	RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
SP339EER1-0A	EXAR	获取价格	RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
SP339EER1-L	EXAR	获取价格	RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
SP339EER1-L/TR	EXAR	获取价格	RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
SP339EER1TR	EXAR	获取价格	RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
SP339EER1-TR	EXAR	获取价格	RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
SP33R6-04UTG	LITTELFUSE	获取价格	基准设定击穿电压性能，保护20nm以下的I/O。在电压等级高于3.3V的情况下，精细几何芯

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