SP3086E Datasheet PDF - Exar

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SP3086E
Exar

Part Number SP3086E
Description Advanced-Failsafe RS-485/RS-422 Transceivers
Page 26 Pages


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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
• 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
RO 
RE 2
DE 3
DI 4
8 PIN NSOIC
SP3082E
SP3085E
SP3088E
Half Duplex
8 Vcc
7B
6A
5 GND
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
Vcc 
RO 2
DI 3
GND 4
8 PIN NSOIC
SP308E
SP3084E
SP3087E
Full Duplex
8A
7B
6Z
5Y
thermal shutdown for overload protection
•Ultra-low 400μA quiescent current
•1μA shutdown mode (except SP3081E, SP3084E, SP3087E)
•Industry standard package footprints
APPLICATIONS
NC 
RO 2
RE 3
DE 4
DI 5
4 PIN NSOIC
SP3080E
SP3083E
SP3086E
4 Vcc
3 NC
2 A
 B
0 Z
• Motor Control
• Building Automation
• Security Systems
• Remote Meter Reading
GND 6
GND 7
Full Duplex 9 Y
8 NC
• 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
61000-4-2). 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 in-
dustrial (-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
preserving 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_101_082611




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DEVICE ARCHITECTURE AND BLOCK DIAGRAMS
Devices are available in three industry standard architectures and footprints. In each footprint there are three
speed grades available.
NC 1
14
13
VCC
NC
RO 2
12 A
R 11 B
RE
DE
3
4
DI 5
6
GND
GND
7
D
10 Z
9Y
8 NC
VCC 1
RO 2
8A
R 7B
DI 3
4
GND
D
6Z
5Y
RO 1
RE 2
DE 3
8 VCC
R
7B
6A
DI 4
D
5 GND
14-Pin Full Duplex
SP3080E, 115kbps slew rate limited
SP3083E, 500kbps slew rate limited
SP3086E, 20Mbps
8-Pin Full Duplex
SP3081E, 115kbps slew rate limited
SP3084E, 500kbps slew rate limited
SP3087E, 20Mbps
8-Pin Half Duplex
SP3082E, 115kbps slew rate limited
SP3085E, 500kbps slew rate limited
SP3088E, 20Mbps
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_101_082611




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Pin Number
Pin Name
PIN ASSIGNMENTS
Pin Function
Full-Duplex
SP3080E SP3081E
SP3083E SP3084E
SP3086E SP3087E
Half -
Duplex
SP3082E
SP3085E
SP3088E
22
1
3-
2
4-
3
53
4
6, 7 4
95
10 6
11 7
--
12 8
--
5
-
-
-
7
-
6
14 1
8
1, 8, 13
-
-
Note: On 14-pin packages connect both pins 6 and 7 to Ground.
RO
RE
REREE
DE
DI
GND
Y
Z
B
B
A
A
VCC
NC
Receiver Output. When RE is low
and if (A – B) ≥ -40mV, RO is high.
If (A – B) ≤ - 200mV, RO is low.
Receiver Output Enable. When RE
is low, RO is enabled. When RE
is high, RO is high impedance.
Drive RE high and DE low to enter
shutdown mode. RE is a hot-swap
input.
Driver Output Enable. When DE
is high, outputs are enabled.
When DE is low, outputs are high
impedance. Drive DE low and RE
high to enter shutdown mode. DE
is a hot-swap input.
Driver Input. With DE high, a low
level on DI forces non-inverting
output low and inverting output
high. A high level on DI forces non-
inverting output high and inverting
output low.
Ground
Non-inverting Driver Output
Inverting Driver Output
Inverting Receiver Input
Inverting Receiver Input and
Inverting Driver Output
Non-inverting Receiver Input
Non-inverting Receiver Input and
Non-inverting Driver Output
Positive Supply VCC. Bypass to
GND with a 0.1uF capacitor.
No Connect, not internally
connected
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP3080E-SP3088E_101_082611



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Absolute Maximum Ratings
These are stress ratings only and functional operation of
the device at these ratings or any other above those indi-
cated in the operation sections of the specifications below
is not implied. Exposure to absolute maximum rating con-
ditions for extended periods of time may affect reliability.
Supply Voltage (VCC).......................................................+ 7.0V
Input voltage at control input pins (RE, DE)... -0.3V to Vcc+0.3V
Driver input voltage (DI) ..............................-0.3V to Vcc+0.3V
Driver output voltage (A, B, Y, and Z) ............................+/-13V
Receiver output voltage (RO) .................-0.3V to (Vcc + 0.3V)
Receiver input voltage (A, B) .........................................+/-13V
Voltage input range, transient pulse, A, B, Y and Z
through 100Ω, see Figure 11 ......................................+/-65.0V
Package Power Dissipation:
Maximum Junction Temperature 150°C
8-Pin SO Θja = 128.4°C/W
14-Pin SO Θja = 86°C/W
Storage Temperature.......................................-65°C to +150°C
Lead Temperature (soldering, 10s)............................... +300°C
RECOMMENDED OPERATING CONDITIONS
Vcc=5V ±10%, Tmin to Tmax, unless otherwise noted, Typical values are Vcc=5V and Ta=25°C
Recommended Operating Conditions
Min. Nom.
Max.
Unit
Supply Voltage, Vcc
Input Voltage on A and B pins
High-level input voltage (DI, DE or RE), Vih
Low-level input voltage (DI, DE or RE), Vih
Output Current
Signaling Rate, 1/tui
Operating Free Air
Temperature, Ta
Driver
Receiver
SP3080E, SP3081E, SP3082E
SP3083E, SP3084E, SP3085E
SP3086E, SP3087E, SP3088E
Industrial Grade (E)
Note: The least positive (most negative) limit is designated as the maxium value.
4.5
-7
2
0
-60
-8
-40
5
5.5
12
Vcc
0.8
60
8
0.115
0.5
20
85
V
V
V
V
mA
Mbps
°C
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_101_082611




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