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What is SP3075E?

This electronic component, produced by the manufacturer "Exar", performs the same function as "RS-485/RS422 Transceivers".


SP3075E Datasheet PDF - Exar

Part Number SP3075E
Description RS-485/RS422 Transceivers
Manufacturers Exar 
Logo Exar Logo 


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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 footprints
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)
Three applications-optimized speed grades
SP3070E-72E: 250kbps slew-limited
SP3073E-75E: 500kbps slew-limited
SP3076E-78E: 16Mbps high speed
Small form factor SO-narrow packages
Industrial (-40 to +85ºC) and Extended
(-40 to +125ºC) temperature grades
RO 1
RE 2
DE 3
DI 4
8 PIN NSOIC
SP3072E
SP3075E
SP3078E
Half Duplex
8 Vcc
7B
6A
5 GND
Vcc 1
RO 2
DI 3
GND 4
8 PIN NSOIC
SP3071E
SP3074E
SP3077E
Full Duplex
8A
7B
6Z
5Y
NC 1
RO 2
RE 3
DE 4
DI 5
GND 6
GND 7
14 PIN NSOIC
SP3070E
SP3073E
SP3076E
Full Duplex
14 Vcc
13 NC
12 A
11 B
10 Z
9Y
8 NC
Now Available in Lead Free Packaging
applications
Industrial Control, Utility Meters Building Automation, Instrumentation, Point of Sale
DESCRIPTION
The SP3070E-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 receiver inputs and driver outputs are ESD protected up to ±15kV (Air-Gap and
Human Body Model) and up to ±8kV Contact discharge (IEC 61000-4-2). The SP3070E-
SP3078E devices may not achieve optimal transmit performance if the connected receiver
includes a biasing network to 5.0V without a termination resistor. Please see Exar Application
Note ANI#21 for further details.
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3070E-SP3078E_102_120210


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SP3075E equivalent
DRIVER SWITCHING CHARACTERISTICS
Unless otherwise noted VCC = +3.3 ±0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3,
ambient temperature TA = +25ºC.
SP3070E, SP3071E & SP3072E Driver Switching Characteristics
DRIVER CHARACTERISTICS:
Conditions
Min. Typ. Max. Unit
Data Signaling Rate
Duty Cycle 40 to 60%
250
Kbps
Driver Propagation Delay (tPHL, tPLH)
Driver Output Rise/Fall Time (tR, tF)
RL = 54Ω, CL = 50pF,
Figure 2 & 3
250
350
1500 ns
1600 ns
Driver Differential Skew (tPLH – tPHL)
200 ns
Driver Enable to Output High (tZH)
Driver Enable to Output Low (tZL)
Driver Disable from Output High (tHZ)
RL = 500Ω, CL = 50pF,
Figure 4 & 5
2500 ns
2500 ns
100 ns
Driver Disable from Output Low (tLZ)
100 ns
Driver Enable from Shutdown to Output
High (t )ZH(SHDN)
Figure 4
5500 ns
Driver Enable from Shutdown to Output
Low (t )ZL(SHDN)
Figure 5
5500 ns
Time to Shutdown (tSHDN)
50 200 600 ns
RECEIVER SWITCHING CHARACTERISTICS
Unless otherwise noted VCC = +3.3 ±0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3,
ambient temperature TA = +25ºC.
SP3070E, SP3071E & SP3072E Receiver Switching Characteristics
RECEIVER CHARACTERISTICS:
Conditions
Min. Typ. Max. Unit
Data Signaling Rate
Duty Cycle 40 to 60% 250
Kbps
Receiver Propagation Delay (tPLH, tPHL)
Propagation Delay Skew (tPLH, tPHL)
Cl=15pF, Figure 6 & 7
200 ns
30 ns
Receiver Enable to Output High (tZH)
Figure 8
50 ns
Receiver Enable to Output Low (tZL)
Figure 8
50 ns
Receiver Disable from Output High (tHZ) Figure 8
100 ns
Receiver Disable from Output Low (tLZ)
Figure 8
200 ns
Receiver Enable from Shutdown to Output
High
Figure 8
4000 ns
Receiver Enable from Shutdown to Output
Low
Figure 8
4000 ns
Time to Shutdown (tSHDN)
50 200 600 ns
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP3070E-SP3078E_102_120210


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