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PDF SP3084E Data sheet ( Hoja de datos )
| Número de pieza | SP3084E | |
| Descripción | (SP3081E - SP3088E) Advanced Failsafe Transceiver | |
| Fabricantes | Sipex Corporation | |
| Logotipo |  |
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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 1
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)
Vcc 1 8 PIN NSOIC 8 A
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
RO 2
DI 3
GND 4
SP3081E
SP3084E
SP3087E
Full Duplex
7B
6Z
5Y
thermal shutdown for overload protection
•Ultra-low 400µA quiescent current
•1µA shutdown mode (except SP3081, SP3084, SP3087)
•Industry standard package footprints
APPLICATIONS
NC 1
RO 2
RE 3
DE 4
DI 5
14 PIN NSOIC
SP3080E
SP3083E
SP3086E
14 Vcc
13 NC
12 A
11 B
10 Z
• Motor Control
• Building Automation
GND 6
GND 7
Full Duplex 9 Y
8 NC
• Security Systems
• Remote Meter Reading
• Long or un-terminated transmission lines
The SP3080E-SP3088E family of RS-485 devices are designed for reliable, bidiDreEctSioCnaRlIcPoTmIOmNu-
nication on multipoint bus transmission lines. Each device contains one differential driver and one
differential receiver. 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.
Rev M 2/22/2007
SP3080E-3088E Advanced RS485 Transceivers
© Copyright 2007 Sipex Corporation
1
1 page  
PARAMETER
Digital Input Signals: DI, DE, RE
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Logic input thresholds
Logic Input Current
Input Hysteresis
Driver
Differential Driver Output (VOD)
Differential Driver Output, Test 1
Differential Driver Output, Test 2
High, VIH
Low, VIL
TA = 25°C, after first transition
TA = 25°C
No Load
RL=100Ω (RS-422)
RL=54Ω (RS-485)
VCM = -7 to +12V
2.0
2
1.5
1.5
0.8
±1
100
VCC
VCC
2.7 VCC
VCC
V
µA
mV
V
V
Change in Magnitude of Differential Output
Voltage (∆VOD) (Note 1)
RL=54 or 100Ω
±0.2 V
Driver Common Mode Output Voltage (Vcc) RL=54 or 100Ω 1 3 V
Change in Common Mode Output Voltage
(∆VOC)
RL=54 or 100Ω
±0.2 V
Driver Short Circuit Current Limit
-7V ≤ VOUT ≤ +12V
Output Leakage Current (Full-duplex versions,
Y & Z pins) Note 2
DE=0,
RE=0,
VCC=0 or
5.5V
VOUT=12V
VOUT= -7V
Receiver
Receiver Input Resistance
-7V ≤ VCM ≤ 12V
Input Current (A, B pins)
DE=0,
RE=0,
Vcc=0 or
5.5V
VIN= 12V
VIN= -7V
-100
96
-100
±250
125
mA
µA
KΩ
125
µA
Receiver Differential Threshold (VA-VB)
Receiver Input Hysteresis
-7V ≤ VCM ≤ 12V
-200
-125
25
-40
mV
mV
Receiver
Output
Voltage
VOH
VOL
High-Z Receiver Output Current
IOUT = -8mA, VID = -40mV
IOUT = 8mA, VID = -200mV
VCC =5.5V, 0 ≤ VOUT ≤ VCC
Vcc-1.5
V
0.4
± 1 µA
Receiver Output Short Circuit Current
0V ≤ VRO ≤ VCC
± 95 mA
Supply and Protection
Supply
Current
IQ, Active Mode
Shutdown Mode
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
No load, DI=0 or VCC
DE=0, RE=Vcc, DI=VCC
Junction temperature
400 900
1
165
15
µA
µA
oC
Notes:
1. Change in Magnitude of Differential Output Voltage and Change in Magnitude of Common Mode Output Voltage are the changes in output voltage when DI input changes state.
2. Except devices which don’t have DE or RE inputs.
3. The transceivers are put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 50ns the device does not enter shutdown. If the enable inputs
are held in this state for at least 600ns the device is assured to be in shutdown. In this low power mode most circuitry is disabled and supply current is typically 1nA.
4.Characterized, not 100% tested.
Rev M 2/22/2007
SP3080E-3088E Advanced RS485 Transceivers
5
© Copyright 2007 Sipex Corporation
5 Page 
TYPICAL PERFORMANCE CHARACTERISTICS
55
53 CL=15pF, V ID=±2V
51
49
47
tPHL
45
43
Pr4o1pagation Delay (ns)
39
tPLH
37
35
-60 -40 -20 0 20 40 60 80 100
Temperature (ºC)
Receiver Propagation Delay
vs Temperature (SP3086-SP3088)
Driver and Receiver Hot Swap
Performance vs. Vcc
Driver Propagation Delay
(SP3080-SP3082)
54
CL=15pF, V ID=±2V
52
50
48
46
Pr4o4pagation Delay (ns)
42
40
-60 -40 -20 0 20 40 60 80 100
Temperature (ºC)
Receiver Average Propagation Delay vs
Temperature (SP3086-SP3088)
Driver output Waveform
Low to High (SP3080-SP3082)
Driver output Waveform
High to Low (SP3080-SP3082)
Rev M 2/22/2007
SP3080E-3088E Advanced RS485 Transceivers
11
© Copyright 2007 Sipex Corporation
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet SP3084E.PDF ] | |
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