参数资料
| 型号： | SP4082EEN-L/TR |
| 厂商： | Exar Corporation |
| 文件页数： | 1/14页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS485/RS422 8NSOIC |
| 标准包装： | 2,500 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 1/1 |
| 规程： | RS422/RS485 |
| 电源电压： | 5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 带卷 (TR) |
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (50)6687000 Fax (50)668-707 www.exar.com
SP4082E_00_22007
DESCRIPTION
FEATURES
APPLICATIONS
SP4082E
5V RS-485/RS-422 Transceivers
1/8th Unit Load, Slew-Rate Limited, ±15kV ESD-Protected
5.0V single supply operation
Receiver failsafe on open or shorted lines
/8th Unit Load, 256 transceivers on bus
Robust ESD protection for RS-485 pins
±5kV Human Body Model
Controlled driver slew rates
5kbps, Low EMI
Driver short circuit current limit and
thermal shutdown for overload protection
Industry standard package footprints
Motor Control
Building Automation
Security Systems
Remote Meter Reading
Long or un-terminated transmission lines
The SP4082E is designed for reliable, bidirectional communication on multipoint bus transmission
lines. The device contains one differential driver and one differential receiver. It is a half-duplex de-
vice. The device complys with TIA/EIA-485 and TIA/EIA-422 standards. Lead-free and RoHS compli-
ant packages are available.
This device is ruggedized for use in harsh operating conditions over the entire common-mode volt-
age range from -7V to +2V. Receivers are specially designed to fail-safe to a logic high output state
if the inputs are un-driven or shorted. All RS-485 bus-pins are protected against severe ESD events
up to ±15kV (Human Body Model). Drivers are protected from excess current flow caused by bus
contention or output short-circuits by both an internal current limit and a thermal-overload shutdown.
Devices are rated for industrial (-40 to +85C) operating temperatures. Receivers have exceptionally
high input impedance, which places only /8th the standard load on a shared bus. Up to 256 trans-
ceivers may coexist while preserving full signal margin.
The device operates from a single 5.0V power supply and draws negligible quiescent power. The
device has an independent enable and disable for the driver and receiver and will enter a low power
shutdown mode if both driver and receiver are disabled. All outputs maintain high impedance during
shutdown or when powered-off.
8 PIN NSOIC
SP4082E
Half Duplex
1
2
3
4
5
6
7
8
GND
A
B
Vcc
RO
RE
DE
DI
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