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
• 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
o ±15kV Human Body Model
o ±8kV Contact Discharge
• Controlled driver slew rates
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
thermal shutdown for overload protection
•Ultra-low 400μA quiescent current
•1μA shutdown mode (except SP3081, SP3084, SP3087)
•Industry standard package footprints
RO
1
RE
2
DE
3
DI
4
8 PIN NSOIC
SP3082E
SP3085E
SP3088E
Half Duplex
8
Vcc
7
B
6
A
5
GND
Vcc
1
RO
2
DI
3
GND
4
8 PIN NSOIC
SP3081E
SP3084E
SP3087E
Full Duplex
8
A
7
B
6
Z
5
Y
NC
1
RO
2
RE 3
DE
4
DI
5
GND 6
GND
7
14 PIN NSOIC
14
Vcc
13
NC
12 A
11
B
10 Z
9 Y
8
NC
APPLICATIONS
• Motor Control
• Building Automation
• Security Systems
• Remote Meter Reading
• Long or un-terminated transmission lines
SP3080E
SP3083E
SP3086E
Full Duplex
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
DESCRIPTION
1
EXAR [ EXAR CORPORATION ]
