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SP3081E

更新时间： 2024-09-16 06:13:07
品牌 Logo 应用领域
艾科嘉 - EXAR /
页数 文件大小 规格书
25页 1596K
描述
Advanced-Failsafe RS-485/RS-422 Transceivers 1/8th Unit Load, Slew-Rate Limited, ±15kV ESD-Protected

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SP3080E-3088E  
Advanced-Failsafe RS-485/RS-422 Transceivers  
1/8th Unit Load, Slew-Rate Limited, ±15kV ESD-Protected  
FEATURES  
• 5.0V single supply operation  
Vcc  
B
RO  
8
1
2
3
4
• Receiver failsafe on open, shorted or terminated lines  
• 1/8th Unit Load, 256 transceivers on bus  
• Robust ESD protection for RS-485 pins  
o ±15kV Air-Gap Discharge  
8 PIN NSOIC  
RE  
7
SP3082E  
SP3085E  
SP3088E  
A
DE  
DI  
6
GND  
5
Half Duplex  
o ±15kV Human Body Model  
o ±8kV Contact Discharge  
• Controlled driver slew rates  
Vcc  
RO  
A
B
Z
Y
1
2
3
4
8
o 115kbps, Low EMI (SP3080E, SP3081E, SP3082E)  
o 500kbps, Low EMI (SP3083E, SP3084E, SP3085E)  
o High Speed, 20Mbps (SP3086E, SP3087E, SP3088E)  
•Hot Swap glitch protection on control inputs  
•Driver short circuit current limit and  
8 PIN NSOIC  
7
SP3081E  
SP3084E  
SP3087E  
DI  
6
GND  
5
Full Duplex  
thermal shutdown for overload protection  
•Ultra-low 400μA quiescent current  
•1μA shutdown mode (except SP3081, SP3084, SP3087)  
•Industry standard package footprints  
Vcc  
NC 1  
14  
13  
RO  
NC  
2
14 PIN NSOIC  
RE  
3
A
12  
11  
10  
9
SP3080E  
SP3083E  
SP3086E  
4
DE  
DI  
B
APPLICATIONS  
Z
5
6
7
GND  
GND  
Y
Full Duplex  
• Motor Control  
• Building Automation  
NC  
8
• Security Systems  
• Remote Meter Reading  
• Long or un-terminated transmission lines  
DESCRIPTION  
The SP3080E-SP3088E family of RS-485 devices are designed for reliable, bidirectional commu-  
nication on multipoint bus transmission lines. Each device contains one differential driver and one  
differential receiver. The SP3082E, SP3085E and SP3088E are half-duplex devices; other part num-  
bers are full-duplex. All devices comply with TIA/EIA-485 and TIA/EIA-422 standards. Lead-free and  
RoHS compliant packages are available for all models.  
These devices are ruggedized for use in harsh operating conditions over the entire common-mode  
voltage range from -7V to +12V. Receivers are specially designed to fail-safe to a logic high output  
state if the inputs are left un-driven or shorted. All RS-485 bus-pins are protected against severe ESD  
events up to ±15kV (Air-Gap and Human Body Model) and up to ±8kV Contact Discharge (IEC 1000-  
4-2). 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 +85ºC) operating temperatures. Receivers have exceptionally high input impedance, which  
places only 1/8th the standard load on a shared bus. Up to 256 transceivers may coexist while pre-  
serving full signal margin.  
All devices operate from a single 5.0V power supply and draw negligible quiescent power. All ver-  
sions except the SP3081E, SP3084E, and SP3087E may independently enable and disable their  
driver and receiver and enter a low power shutdown mode if both driver and receiver are disabled.  
All outputs maintain high impedance in shutdown or when powered-off.  
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com  
SP3080E-SP3088E_100_062309  
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