SP3483 [SIPEX]
+3.3V Low Power Slew Rate Limited Half-Duplex RS-485 Transceiver; + 3.3V低功耗限摆率半双工RS- 485收发器
| 型号： | SP3483 |
| 厂家： | 
SIPEX CORPORATION |
| 描述： | +3.3V Low Power Slew Rate Limited Half-Duplex RS-485 Transceiver |
| 文件： | 总9页 (文件大小：160K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
SP3483
+3.3V Low Power Slew Rate Limited
Half-Duplex RS-485 Transceiver
■ RS-485 and RS-422 Transceiver
■ Operates from a single +3.3V supply
■ Interoperable with +5.0V logic
■ Driver/Receiver Enable
■ Low Power Shutdown Mode
■ -7V to +12V Common-Mode Input
Voltage Range
■ Allows up to 32 transceivers on
the serial bus
■ Compatibility with the industry
standard 75176 pinout
■ Driver Output Short-Circuit Protection
■ Slew Rate Limited Driver for Low EMI
(SP3483)
DESCRIPTION
The SP3483 device is part of a family of +3.3V low power half-duplex transceivers that meet
the specifications of the RS-485 and RS-422 serial protocols. This device is pin-to-pin
compatible with the Sipex SP483 device as well as popular industry standards. The SP3483
features Sipex's BiCMOS process, allowing low power operation without sacrificing
performance. The SP3483 is internally slew rate limited to reduce EMI and can meet the
requirements of RS-485 and RS-422 up to 250kbps.
RO
1
2
3
4
R
8 Vcc
7 B
RE
DE
DI
6 A
5 GND
D
SP3483
SP3483 DS/04
SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers
© Copyright 2000 Sipex Corporation
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device at
theseratingsoranyotherabovethoseindicatedintheoperationsections
ofthespecificationsbelowisnotimplied. Exposuretoabsolutemaximum
rating conditions for extended periods of time may affect reliability.
VCC............................................................................................................+7V
Input Voltages
Logic........................................................-0.3Vto(VCC+0.5V)
Drivers..................................................-0.3Vto(VCC+0.5V)
Receivers................................................................. ±15V
Output Voltages
Logic........................................................-0.3Vto(VCC+0.5V)
Drivers...................................................................... ±15V
Receivers............................................-0.3V to (VCC+0.5V)
StorageTemperature.......................................................-65˚Cto+150˚C
Power Dissipation per package
8-pin NSOIC (derate 6.14mW/˚C above +70˚C).........................500mW
8-pin PDIP (derate 11.8mW/˚C above +70˚C)..........................1000mW
SPECIFICATIONS
TMIN to TMAX and VCC = +3.3V ± 5% unless otherwise noted.
PARAMETERS
MIN.
TYP.
MAX. UNITS
CONDITIONS
DRIVER
DC Characteristics
Differential Output Voltage
Differential Output Voltage
GND
2
VCC
VCC
Volts
Volts
Unloaded; R = ∞; Figure 1
with load; R = 50Ω; (RS-422); Figure 1
Differential Output Voltage
Change in Magnitude of Driver
Differential Output Voltage for
Complimentary States
Driver Common-Mode
Output Voltage
Input High Voltage
Input Low Voltage
Input Current
1.5
VCC
Volts
Volts
with load; R = 27Ω; (RS-485); Figure 1
R = 27Ω or R = 50Ω; Figure 1
0.2
3
Volts
Volts
Volts
µA
R = 27Ω or R = 50Ω; Figure 1
Applies to DE, DI, RE
Applies to DE, DI, RE
Applies to DE, DI, RE
2.0
0.8
±10
Driver Short-Circuit Current
VOUT = HIGH
VOUT = LOW
±250
±250
mA
mA
-7V ≤ VO ≤ +12V
-7V ≤ VO ≤ +12V
DRIVER
AC Characteristics
Maximum Data Rate
250
400
400
kbps
ns
RE = VCC, DE = VCC
Figures 2 and 8
Driver Input to Output, tPLH
Driver Input to Output, tPHL
900
900
1500
1500
ns
Figures 2 and 8
Differential Driver Skew
Driver Rise or Fall Time
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High
10
700
700
690
80
ns
ns
ns
ns
ns
ns
tDO1 - tDO2 Figures 2 and 9
From 10% to 90% Figures 3 and
Figures 4 and 10
Figures 5 and 10
Figures 5 and 10
1000
1300
1300
120
9
90
120
Figures 4 and 10
RECEIVER
DC Characteristics
Differential Input Threshold
Input Hysteresis
Output Voltage High
Output Voltage Low
Three-State (High Impedance)
Output Current
-0.2
+0.2
Volts
mV
Volts
Volts
-7V ≤ VCM ≤ +12V
VCM = 0V
VID = +200mV, -1.5mA
VID = -200mV, 2.5mA
20
15
VCC-0.4
0.4
+1
µA
kΩ
mA
mA
mA
0V ≤ VO ≤ VCC; RE = VCC
-7V ≤ VCM ≤ +12V
DE = 0V, VCC = 0V or 3.6V, VIN = 12V
DE = 0V, VCC = 0V or 3.6V, VIN = -7V
0V ≤ VCM ≤ VCC
Input Resistance
12
7
Input Current (A, B); VIN = 12V
Input Current (A, B); VIN = -7V
Short-Circuit Current
1.0
-0.8
60
SP3483 DS/04
SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers
© Copyright 2000 Sipex Corporation
2
SPECIFICATIONS (continued)
TMIN to TMAX and VCC = +3.3V ± 5% unless otherwise noted.
PARAMETERS
RECEIVER
MIN.
TYP.
MAX. UNITS
CONDITIONS
AC Characteristics
Maximum Data Rate
Receiver Input to Output, tPLH
250
35
kbps
RE = 0V, DE = 0V
Figures 6 and 11
70
70
50
120
120
ns
ns
ns
Receiver Input to Output, tPHL
Differential Receiver Skew
35
Figures 6 and 11
tRSKEW = tRPHL - tRPLH
Figures 6 and 11
Receiver Enable to
Output Low
45
70
ns
Figures 7 and 12; S1 closed, S2 open
Receiver Enable to
Output High
Receiver Disable from Low
Receiver Disable from High
45
45
45
70
70
70
ns
ns
ns
Figures 7 and 12; S2 closed, S1 open
Figures 7 and 12; S1 closed, S2 open
Figures 7 and 12; S2 closed, S1 open
Shutdown Timing
Time to Shutdown
Driver Enable from Shutdown
to Output High
Driver Enable from Shutdown
to Output Low
Receiver Enable from
Shutdown to Output High
Receiver Enable from
Shutdown to Output Low
50
200
600
ns
ns
ns
ns
ns
RE = 5V, DE = 0V
2000
2000
2500
2500
Figures 4 and 10
Figures 5 and 10
Figures 7 and 12; S2 closed, S1 open
Figures 7 and 12; S1 closed, S2 open
POWER REQUIREMENTS
Supply Current
No Load
350
250
650
10
µA
µA
µA
RE, DI = 0V or VCC; DE = VCC
RE = 0V, DI = 0V or VCC; DE = 0V
DE = 0V, RE=VCC
Shutdown Mode
SP3483 DS/04
SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers
© Copyright 2000 Sipex Corporation
3
PIN FUNCTION
Pin 1 – RO – Receiver Output.
Pin 2 – RE – Receiver Output Enable Active LOW.
Pin 3 – DE – Driver Output Enable Active HIGH.
RO
RE
DE
DI
1
2
3
4
8
7
6
5
V
B
A
R
CC
Pin 4 – DI – Driver Input.
Pin 5 – GND – Ground Connection.
Pin 6 – A – Driver Output/Receiver Input
Non-inverting.
D
GND
Pin 7 – B – Driver Output/Receiver Input Inverting.
Pin 8 – Vcc – Positive Supply +3.00V < VCC < +3.60V
Top View
SP3483
Pinout (Top View)
Receivers
DESCRIPTION
TheSP3483 receiver has differential inputs with
an input sensitivity as low as ±200mV. Input
impedance of the receivers is typically 15kΩ
(12kΩ minimum). A wide common mode range
of -7V to +12V allows for large ground potential
differences between systems. The receiver of
the SP3483 has a high impedance (high-z)
enable control pin. A logic LOW on RE (pin 2)
will enable the receiver, a logic HIGH on RE
(pin 2) will disable the receiver.
The SP3483 device is part of a family of +3.3V
lowpowerhalf-duplextransceiversthatmeetthe
specifications of the RS-485 and RS-422 serial
protocols. The device is pin-to-pin compatible
with the Sipex SP483 device as well as popular
industrystandards.TheSP3483featuresSipex's
BiCMOS process allowing low power operation
without sacrificing performance.
Drivers
The driver outputs of theSP3483 are differential
outputs meeting the RS-485 and RS-422
standards. The typical voltage output swing
with no load will be 0 Volts to +3.3 Volts.
With a loading of 54Ω across the differential
outputs, the drivers maintain greater than 1.5V
voltage levels. The drivers have an enable
control line which is active HIGH. A logic
HIGH on DE (pin 3) will enable the differential
driver outputs. A logic LOW on DE (pin 3) will
force the driver outputs into high impedance
(high-Z).
The receiver of the SP3483 will operate up to
250kbps. The receiver is equipped with a
fail-safe feature that guarantees the receiver
output will be in a HIGH state when the input
is left unconnected.
Shutdown Mode
TheSP3483isequippedwithaShutdownmode.
To enable the Shutdown state, both the driver
and receiver must be disabled simultaneously.
A logic LOW on DE (pin 3) and a logic HIGH on
RE (pin 2) will put the SP3483 into Shutdown
mode. In Shutdown, supply current will drop to
typical 1µA, 10µA maximum.
The SP3483 has internally slew rate limited
driver outputs to minimize EMI. The tranceivers
will operate up to 250kbps. The 250mA ISC
maximum limit on the driver output allows the
SP3483 to withstand an infinite short circuit
over the -7.0V to +12.0V common mode range
without catastrophic damage to the IC.
SP3483 DS/04
SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers
© Copyright 2000 Sipex Corporation
4
VDM
R
R
RL = 27Ω
S1
D
OUT
VOD
D
GENERATOR
(NOTE 1)
50Ω
CL
= 15pF
(NOTE 2)
VOC
VCC
VCC
V
OH + VOL
VOM
=
1.5V
2
Figure 1. Driver DC Test Load Circuit
Figure 2. Driver Propagation Delay Test Circuit
S1
D
OUT
= 110Ω
CL
RL =
60Ω
R
L
OUT
D
C
L
= 50pF
(NOTE 2)
GENERATOR
(NOTE 1)
GENERATOR
(NOTE 1)
50Ω
50Ω
VCC
CL = 15pF (NOTE 2)
V
OH + VOL
VOM
=
1.5V
2
Figure 4. Driver Enable and Disable Timing Circuit,
Output HIGH
Figure 3. Driver Differential Output Delay and Transition
Time Circuit
VCC
OUT
RL = 110Ω
VID
R
S1
GENERATOR
(NOTE 1)
50Ω
0V OR 3V
D
OUT
C
L
= 15pF
(NOTE 2)
CL = 50pF
(NOTE 2)
GENERATOR
(NOTE 1)
50Ω
1.5V
0V
V
OM = VCC
2
Figure 6. Receiver Propagation Delay Test Circuit
Figure 5. Driver Enable and Disable Timing Circuit,
Output LOW
S1
S3
1.5V
VCC
1k
-1.5V
VID
R
S2
C
L
= 15pF
(NOTE 2)
GENERATOR
(NOTE 1)
50Ω
Figure 7. Receiver Enable and Disable Timing Circuit
INPUTS
OUTPUTS
INPUTS
OUTPUTS
LINE
RE DE DI CONDITION
RE
DE
0
A - B
+0.2V
R
1
B
0
A
1
0
0
0
1
X
X
X
1
1
0
1
0
No Fault
No Fault
X
0
-0.2V
0
1
0
0
Inputs Open
X
1
X
Z
Z
0
Z
Table 1. Transmit Function Truth Table
Table 2. Receive Function Truth Table
SP3483 DS/04
SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers
© Copyright 2000 Sipex Corporation
5
3V
0V
1.5V
1.5V
INPUT
3V
0V
IN
1.5V
1.5V
t
PLH
t
PHL
VOH
V
OM
V
OM
Y OUTPUT
tDO1
tDO2
VOL
2.0V
t
PHL
t
PLH
90%
90%
V
OH
50%
10%
50%
10%
OUT
Z OUTPUT
V
OM
VOM
-2.0V
VOL
t
TD
t
TD
V
OH + VOL
≈ 1.5V
V
OM
=
2
Figure 8. Driver Propagation Delay Waveforms
Figure 9. Driver Differential Output Delay and Transition
Time Waveforms
3V
1.5V
1.5V
DE
0V
3V
t
PHZ
t
PZH
INPUT
1.5V
1.5V
V
OH
0.25V
0.25V
0V
OUTPUT
HIGH
V
OM
t
RPLH
t
RPHL
0V
V
CC
V
OM
OUTPUT
V
OM
t
PZL
t
PLZ
V
CC
0V
OUTPUT
LOW
V
OM
V
2
CC
V
OM
=
V
OL
V
OH + VOL
≈ 1.5V
VOM
=
2
Figure 10. Driver Enable and Disable Timing Waveforms
Figure 11. Receiver Propagation Delay Waveforms
S1 is open
S2 is closed
S3 = 1.5V
S1 is closed
S2 is open
S3 = -1.5V
3V
3V
1.5V
1.5V
1.5V
1.5V
RE
RE
0V
0V
t
t
PRZL
PRSL
t
PRZH
PRSH
t
PRHZ
t
PRLZ
t
V
CC
VOH
10%
1.5V
OUTPUT
OUTPUT
1.5V
10%
V
OL
0V
Figure 12. Receiver Enable and Disable Waveforms
NOTE 1: The input pulse is supplied by a generator with the following characteristics:
PRR=250KHz, 50% duty cycle, tr < 6.0ns, Z0=50Ω.
NOTE 2: CL includes probe and stray capacitance.
SP3483 DS/04
SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers
© Copyright 2000 Sipex Corporation
6
PACKAGE: PLASTIC
DUAL–IN–LINE
(NARROW)
E1
E
D1 = 0.005" min.
(0.127 min.)
A1 = 0.015" min.
(0.381min.)
D
A = 0.210" max.
(5.334 max).
C
A2
Ø
L
B1
B
e
= 0.300 BSC
(7.620 BSC)
e = 0.100 BSC
(2.540 BSC)
A
ALTERNATE
END PINS
(BOTH ENDS)
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
8–PIN
0.115/0.195
(2.921/4.953)
A2
0.014/0.022
(0.356/0.559)
B
0.045/0.070
B1
C
(1.143/1.778)
0.008/0.014
(0.203/0.356)
0.355/0.400
(9.017/10.160)
D
0.300/0.325
(7.620/8.255)
E
0.240/0.280
E1
L
(6.096/7.112)
0.115/0.150
(2.921/3.810)
0°/ 15°
(0°/15°)
Ø
SP3483 DS/04
SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers
© Copyright 2000 Sipex Corporation
7
PACKAGE: PLASTIC
SMALL OUTLINE (SOIC)
(NARROW)
E
H
h x 45°
D
A
Ø
A1
L
e
B
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
8–PIN
A
A1
B
D
E
0.053/0.069
(1.346/1.748)
0.004/0.010
(0.102/0.249
0.014/0.019
(0.35/0.49)
0.189/0.197
(4.80/5.00)
0.150/0.157
(3.802/3.988)
e
0.050 BSC
(1.270 BSC)
H
h
0.228/0.244
(5.801/6.198)
0.010/0.020
(0.254/0.498)
L
0.016/0.050
(0.406/1.270)
Ø
0°/8°
(0°/8°)
SP3483 DS/04
SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers
© Copyright 2000 Sipex Corporation
8
ORDERING INFORMATION
Model
Temperature Range
Package
SP3483CN .................................................................................... 0˚C to +70˚C ............................................................................ 8-pin Narrow SOIC
SP3483CP .................................................................................... 0˚C to +70˚C ................................................................................ 8-pin Plastic DIP
SP3483EN .................................................................................. .-40˚C to +85˚C .......................................................................... 8-pin Narrow SOIC
SP3483EP ................................................................................... -40˚C to +85˚C .............................................................................. 8-pin Plastic DIP
Please consult the factory for pricing and availability on a Tape-On-Reel option.
Co rp o ra tio n
SIGNAL PROCESSING EXCELLENCE
Sipex Corporation
Headquarters and
Sales Office
22 Linnell Circle
Billerica, MA 01821
TEL: (978) 667-8700
FAX: (978) 670-9001
e-mail: sales@sipex.com
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the
application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others.
SP3483 DS/04
SP3483 Low Power Slew Rate Limited Half-Duplex RS485 Transceivers
© Copyright 2000 Sipex Corporation
9
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