®
SP3070E - SP3078E Family
±15kV
ESD-Protected, 3.3V, 1/8 Load, Failsafe
RS-485/RS422 Transceivers
FEATURES
■
±15kV
ESD protection for RS485 pins
■
3.3V low-power operation
■
Advanced Receiver-failsafe protection for
open, shorted or terminated lines
■
Up to 256 Transceivers may share Bus
■
Very low load for 8x greater fanout
■
Hot Swap glitch protection RE and DE
■
Thermal shutdown protects against driver
contention
■
Available in three industry standard foot-
prints
■
SP3070E, 3073 and 3076 in Full-Duplex (14 pin)
■
SP3071E, 3074 and 3077 in Full-Duplex (8 pin)
■
SP3072E, 3075 and 3078 in Half-Duplex (8 pin)
NC
1
RO
2
RE
3
DE
4
DI
5
GND
6
GND
7
14
V
CC
RO
1
RE
2
DE
3
DI
4
8 PIN NSOIC
SP3072E
SP3075E
SP3078E
Half Duplex
8
V
CC
7
B
6
A
5
GND
V
CC
1
R
O
2
D
I
3
GND
4
8 PIN NSOIC
SP3071E
SP3074E
SP3077E
Full Duplex
8
A
7
B
6
Z
5
Y
■
Three applications-optimized speed grades
■
SP3070-72E: 250kbps slew-limited
■
SP3073-75E: 500kbps slew-limited
■
SP3076-78E: 16Mbps high speed
14 Pin NSOIC
SP3070E
SP3073E
SP3076E
Full Duplex
13
NC
12
A
11
B
10
Z
9
Y
8
NC
■
Small form factor SO-narrow packages
■
Industrial (-40 to +85ºC) and Extended
(-40 to +85ºC) temperature grades
Now Available in Lead Free Packaging
APPLICATIONS
■
Industrial Control, Utility Meters Building Automation, Instrumentation, Point of Sale
DESCRIPTION
The SP3070-3078E differential line transceivers are suitable for bidirectional communication
on balanced multipoint bus transmission lines and comply with both RS485 and RS422 EIA
Standards. Each device consists of a differential driver and differential receiver. All devices
operate from a 3.3V power supply.
High receiver input impedance allows a large number of transceivers to share a common data
bus while maintaining signal margin and without excessive loading or use of expensive
repeaters. The high impedance driver output is maintained over the entire common-mode
voltage range from -7 to +12V. Receivers will failsafe to logic 1 output when inputs are open,
shorted or terminated. Drivers include built-in short-circuit protection and a thermal-overload
shutdown to protect against excessive power dissipation from bus contention or cable faults.
All RS485 inputs are ESD protected up to
±15kV
(Air-Gap and Human Body Model) and up
to
±8kV
Contact discharge (IEC 1000-4-2).
Date: 03/28/05
SP3070E - SP3078E Family,
±15kV
ESD-Protected, Failsafe RS-485/RS422 Transceivers
© Copyright 2005 Sipex Corporation
1
SIPEX [ SIPEX CORPORATION ]
