SP3080E Datasheet, PDF (1/21 Pages) Sipex Corporation – Advanced-Failsafe RS-485/RS-422 Transceiver 1/8th Unit Load, Slew-Limited, ±15kV ESD-Protected

Solved by
SP3080E
TM
Advanced-Failsafe RS-485/RS-422 Transceiver
1/8th Unit Load, Slew-Limited, ±15kV ESD-Protected
FEATURES
• 5.0V single supply operation
• Receiver failsafe on open, short 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
•Hot Swap glitch protection on control inputs
•Driver short circuit current limit and
thermal shutdown for overload protection
•Ultra-low 300µA quiescent current
•650nA shutdown mode
•Industry standard package footprints
NC 1
RO 2
RE ₃
DE 4
DI 5
GND 6
GND 7
14 PIN NSOIC
SP3080E
Full Duplex
14 Vcc
13 NC
12 A
11 B
10 Z
9Y
8 NC
APPLICATIONS
• Motor Control
• Building Automation
• Security Systems
• Remote Meter Reading
• Long or un-terminated transmission lines
DESCRIPTION
The SP3080E is designed for reliable, bidirectional communication on multipoint bus transmission
lines. The device contains one differential driver and one differential receiver. The SP3080E is a
full-duplex device. All devices comply with TIA/EIA-485 and TIA/EIA-422 standards. Lead-free and
RoHS compliant packages are available for all models.
This device is ruggedized for use in harsh operating conditions over the entire common-mode volt-
age range from -7V to +12V. The receiver is a 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). The driver is protected from excess current flow caused by bus contention or output short-circuits
by both an internal current limit and a thermal-overload shutdown. The device is rated for industrial
(-40 to +85ºC) or extended (-40 to +125ºC) operating temperatures. The receiver has exceptionally
high input impedance, which places only 1/8th 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
SP3080E may independently enable and disable its driver and receiver and enter a low power shut-
down mode if both driver and receiver are disabled. The output maintains high impedance in shut-
down or when powered-off.
Rev N 9/15/2006
SP3080E Advanced RS485 Transceiver
1
© Copyright 2006 Sipex Corporation