SP491CS [SIPEX]
Full Duplex RS-485 Transceivers; 全双工RS- 485收发器
| 型号： | SP491CS |
| 厂家： | 
SIPEX CORPORATION |
| 描述： | Full Duplex RS-485 Transceivers |
| 文件： | 总12页 (文件大小：84K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
SP490/SP491
Full Duplex RS-485 Transceivers
■ +5V Only
■ Low Power BiCMOS
■ Driver/Receiver Enable (SP491)
■ RS-485 and RS-422 Drivers/Receivers
■ Pin Compatible with LTC490 and
SN75179 (SP490)
■ Pin Compatible with LTC491 and
SN75180 (SP491)
DESCRIPTION
The SP490 is a low power differential line driver/receiver meeting RS-485 and RS-422
standards up to 5Mbps. The SP491 is identical to the SP490 with the addition of driver and
receiver tri-state enable lines. Both products feature ±200mV receiver input sensitivity, over
wide common mode range. The SP490 is available in 8-pin plastic DIP and 8-pin NSOIC
packages for operation over the commercial and industrial temperature ranges. The SP491
is available in 14-pin DIP and 14-pin NSOIC packages for operation over the commercial and
industrial temperature ranges.
BLOCK DIAGRAMS
14 Vcc
13 NC
12 A
NC 1
R 2
REB 3
DE 4
Vcc 1
R 2
R
8 A
11 B
R
7 B
6 Z
10 Z
D 3
D 5
D
D
5 Y
9 Y
GND 4
GND 6
GND
7
8 NC
SP490
SP491
Date: 05/10/04
SP490/491 Full Duplex RS-485 Transceivers
© Copyright 2004 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
Drivers................................................-0.5V to (VCC+0.5V)
Receivers..................................................................±14V
Output Voltages
Drivers......................................................................±14V
Receivers...........................................-0.5V to (VCC+0.5V)
Storage Temperature....................................................-65˚C to +150˚
Power Dissipation.....................................................................1000mW
ELECTRICAL CHARACTERISTICS
TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted.
PARAMETERS
MIN.
TYP.
MAX. UNITS CONDITIONS
SP490 DRIVER
DC Characteristics
Differential Output Voltage
Differential Output Voltage
GND
2
VCC
VCC
Volts
Volts
Unloaded; R = ∞ ; see figure 1
With Load; R = 50Ω; (RS422);
see 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; (RS485);see figure 1
0.2
3
R = 27Ω or R = 50Ω; see figure 1
Volts
Volts
Volts
µA
R = 27Ω or R = 50Ω; see figure 1
Applies to D
Applies to D
2.0
0.8
±10
Applies to D
Driver Short-Circuit Current
VOUT = HIGH
VOUT = LOW
35
35
250
250
mA
mA
-7V ≤ VO ≤ +12V
-7V ≤ VO ≤ +12V
SP490 DRIVER
AC Characteristics
Maximum Data Rate
Driver Input to Output
5
Mbps
ns
30
30
5
60
60
tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF;
see figures 3 and 6
tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF;
see figures 3 and 6
Driver Input to Output
Driver Skew
ns
ns
ns
see figures 3 and 6,
tSKEW = | tDPLH - tDPHL
|
Driver Rise or Fall Time
15
40
From 10% to 90%; RDIFF = 54Ω,
CL1 = CL2 = 100pF; see figures 3 and 6
SP490 RECEIVER
DC Characteristics
Differential Input Threshold
Input Hysteresis
Output Voltage High
Output Voltage Low
0.2
3.5
12
+0.2 Volts
mV
-7V ≤ VCM ≤ 12V
VCM = 0V
IO = -4mA, VID = +200mV
IO = +4mA, VID = -200mV
-7V ≤ VCM ≤ 12V
VIN = 12V
70
15
Volts
0.4
Volts
Input Resistance
kΩ
±1.0 mA
Input Current (A, B); VIN = 12V
Input Current (A, B); VIN = -7V
Short-Circuit Current
-0.8
mA
VIN = -7V
0V ≤ VO ≤ VCC
85
mA
Date: 05/10/04
SP490/491 Full Duplex RS-485 Transceivers
© Copyright 2004 Sipex Corporation
2
ELECTRICAL CHARACTERISTICS
TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted.
PARAMETERS
MIN.
TYP.
MAX. UNITS CONDITIONS
SP490 RECEIVER
AC Characteristics
Maximum Data Rate
Receiver Input to Output
5
Mbps
ns
90
90
13
150
150
tPLH; RDIFF = 54Ω,
CL1 = CL2 = 100pF; Figures 3 & 8
Receiver Input to Output
ns
ns
tPHL; RDIFF = 54Ω,
CL1 = CL2 = 100pF; Figures 3 & 8
RDIFF = 54Ω; CL1 = CL2 = 100pF;
Figures 3 & 8
Diff. Receiver Skew ItPLH-tPHL
I
POWER REQUIREMENTS
Supply Voltage
+4.75
+5.25 Volts
Supply Current
900
µA
ENVIRONMENTAL AND
MECHANICAL
Operating Temperature
Commercial (_C_)
Industrial (_E_)
Storage Temperature
Package
0
-40
-65
+70
+85
+150 °C
°C
°C
Plastic DIP (_S_)
NSOIC (_N)
A
1K
Test Point
Receiver
Output
R
V
CC
S
S
1
V
OD
C
RL
1K
V
OC
R
2
B
Figure 1. Driver DC Test Load Circuit
Figure 2. Receiver Timing Test Load Circuit
3V
DE
C
C
L1
V
CC
S
1
A
B
A
B
DI
R
DIFF
500
Output
RO
Under
L2
Test
C
L
15pF
S
2
Figure 3. Driver/Receiver Timing Test Circuit
Figure 4. Driver Timing Test Load #2 Circuit
Date: 05/10/04
SP490/491 Full Duplex RS-485 Transceivers
© Copyright 2004 Sipex Corporation
3
f = 1MHz; t < 10ns; t < 10ns
R
F
+3V
0V
1.5V
1.5V
DI
t
t
PHHLL
PLLHH
B
A
+
1/2V
1/2V
O
O
DDRIVER
OUTPUT
V
O
t
t
DPPLLHH
DPPHHLL
DDIFFERENTIAL
OUTPUT
V
V
O
0V
–
V – V
A
O
B
t
t
F
R
t
t
t
SKKEEWW == | DPPLLHH -- DPPHHLL |
Figure 6. Driver Propagation Delays
f = 1MHz; tR < 10ns; tF < 10ns
1.5V
+3V
DE
1.5V
0V
tZL
2.3V
tLZ
5V
A, B
Output normally LOW
Output normally HIGH
0.5V
0.5V
VOL
VOH
A, B
2.3V
tZH
0V
tHZ
Figure 7. Driver Enable and Disable Times
+
–
V
V
0D2
0V
0V
A – B
R
INPUT
0D2
V
OH
1.5V
1.5V
OUTPUT
V
OL
t
t
PLH
PHL
f = 1MHz; t < 10ns; t < 10ns
R
F
t
t t
| PHL - PLH |
SKEW =
Figure 8. Receiver Propagation Delays
Date: 05/10/04
SP490/491 Full Duplex RS-485 Transceivers
© Copyright 2004 Sipex Corporation
4
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...................................................-0.5V to (VCC+0.5V)
Drivers................................................-0.5V to (VCC+0.5V)
Receivers..................................................................±14V
Output Voltages
Logic...................................................-0.5V to (VCC+0.5V)
Drivers......................................................................±14V
Receivers...........................................-0.5V to (VCC+0.5V)
Storage Temperature......................................................-65˚C to +150
Power Dissipation.....................................................................1000mW
ELECTRICAL CHARACTERISTICS
TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted.
PARAMETERS
MIN.
TYP.
MAX. UNITS CONDITIONS
SP491 DRIVER
DC Characteristics
Differential Output Voltage
Differential Output Voltage
GND
2
VCC
VCC
Volts
Volts
Unloaded; R = ∞ ; see figure 1
With Load; R = 50Ω; (RS422);
see 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; (RS485); see figure 1
0.2
3
R = 27Ω or R = 50Ω; see figure 1
Volts
Volts
Volts
µA
R = 27Ω or R = 50Ω; see figure 1
Applies to D, REB, DE
Applies to D, REB, DE
2.0
0.8
±10
Applies to D, REB, DE
Driver Short-Circuit Current
VOUT = HIGH
VOUT = LOW
35
35
250
250
mA
mA
-7V ≤ VO ≤ 12V
-7V ≤ VO ≤ 12V
SP491 DRIVER
AC Characteristics
Maximum Data Rate
Driver Input to Output
5
20
Mbps
ns
REB = 5V, DE = 5V
tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF;
see figures 3 and 6
tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF;
see figures 3 and 6
see figures 3 and 6,
30
30
5
60
60
10
40
70
70
70
70
Driver Input to Output
20
3
ns
ns
ns
ns
ns
ns
ns
Driver Skew
tSKEW = | tDPLH - tDPHL
|
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
15
40
40
40
40
From 10% to 90%; RDIFF = 54Ω,
CL1 = CL2 = 100pF; see figures 3 and 6
CL1 = CL2 = 100pF; see figures
4 and 7; S2 closed
CL1 = CL2 = 100pF; see figures
4 and 7; S1 closed
CL1 = CL2 = 100pF; see figures
4 and 7; S1 closed
CL1 = CL2 = 100pF; see figures
4 and 7; S2 closed
Date: 05/10/04
SP490/491 Full Duplex RS-485 Transceivers
© Copyright 2004 Sipex Corporation
5
ELECTRICAL CHARACTERISTICS
TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted.
PARAMETERS
MIN.
TYP.
MAX. UNITS CONDITIONS
SP491 RECEIVER
DC Characteristics
Differential Input Threshold
Input Hysteresis
Output Voltage High
Output Voltage Low
-0.2
3.5
+0.2 Volts
mV
-7V ≤ VCM ≤ 12V
VCM = 0V
IO = -4mA, VID = +200mV
IO = +4mA, VID = -200mV
70
Volts
0.4
Volts
Three State (high impedance)
Output Current
Input Resistance
Input Current (A, B); VIN = 12V
Input Current (A, B); VIN = -7V
Short-Circuit Current
±1
µA
kΩ
0.4V ≤ VO ≤ 2.4V; REB = 5V
-7V ≤ VCM ≤ 12V
DE = 0V, VCC = 0V or 5.25V, VIN = 12V
DE = 0V, VCC = 0V or 5.25V, VIN = -7V
0V ≤ VO ≤ VCC
12
7
15
±1.0 mA
-0.8
85
mA
mA
SP491 RECEIVER
DC Characteristics
Maximum Data Rate
Receiver Input to Output
5
60
Mbps
ns
REB = 0V
tPLH; RDIFF = 54Ω,
CL1 = CL2 = 100pF; Figures 3 & 8
90
90
13
150
150
Receiver Input to Output
60
ns
ns
tPHL; RDIFF = 54Ω,
CL1 = CL2 = 100pF; Figures 3 & 8
RDIFF = 54Ω; CL1 = CL2 = 100pF;
Figures 3 & 8
Diff. Receiver Skew ItPLH-tPHL
I
Receiver Enable to Output Low
Receiver Enable to Output High
Receiver Disable from Low
Receiver Disable from High
20
20
20
20
50
50
50
50
ns
ns
ns
ns
CRL = 15pF; Figures 2 and 9; S1 closed
CRL = 15pF; Figures 2 and 9; S2 closed
CRL = 15pF; Figures 2 and 9; S1 closed
CRL = 15pF; Figures 2 and 9; S2 closed
POWER REQUIREMENTS
Supply Voltage
+4.75
+5.25 Volts
Supply Current
600
µA
REB, D = 0V or VCC; DE = VCC
SP491 ENVIRONMENTAL
AND MECHANICAL
Operating Temperature
Commercial (_C_)
Industrial (_E_)
Storage Temperature
Package
0
-40
-65
+70
+85
+150 °C
°C
°C
Plastic DIP (_S_)
NSOIC (_N)
+3V
RE
1.5V
1.5V
f = 1MHz; t < 10ns; t < 10ns
R
F
0V
t
t
LZ
ZL
5V
R
1.5V
Output normally LOW
Output normally HIGH
0.5V
0.5V
V
IL
V
IH
R
1.5V
0V
t
t
HZ
ZH
Figure 9. Receiver Enable and Disable Times
Date: 05/10/04
SP490/491 Full Duplex RS-485 Transceivers
© Copyright 2004 Sipex Corporation
6
The driver of the SP491 has a driver enable
control line which is active high. A logic high
on DE (pin 4) of the SP491 will enable
the differential driver outputs. A logic low
on DE (pin 4) of the SP491 will tri-state the
driver outputs. The SP490 does not have a
driver enable.
DESCRIPTION
The SP490 and SP491 are full-duplex differential
transceivers that meet the requirements of
RS-485 and RS-422. Fabricated with a Sipex
proprietary BiCMOS process, both products
require a fraction of the power of older bipolar
designs.
Receiver...
The RS-485 standard is ideal for multi-drop
applications or for long-distance interfaces.
RS-485 allows up to 32 drivers and 32 receivers
to be connected to a data bus, making it an ideal
choice for multi-drop applications. Since the
cabling can be as long as 4,000 feet, RS-485
transceivers are equipped with a wide (-7V to
+12V) common mode range to accommodate
ground potential differences. Because RS-485
is a differential interface, data is virtually
immune to noise in the transmission line.
The receivers for both the SP490 and SP491
have 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 receivers for both the
SP490 and SP491 are equipped with the
fail-safe feature. Fail-safe guarantees that
the receiver output will be in a high state when
the input is left unconnected.
Driver...
The receiver of the SP491 has a receiver
enable control line which is active low. A logic
low on REB (pin 3) of the SP491 will enable
the differential receiver. A logic high on REB
(pin 3) of the SP491 will tri-state the receiver.
The drivers for both the SP490 and SP491 have
differential outputs. The typical voltage output
swing with no load will be 0 volts to +5 volts.
With worst case loading of 54Ω across the
differential outputs, the driver can maintain
greater than 1.5V voltage levels.
Date: 05/10/04
SP490/491 Full Duplex RS-485 Transceivers
© Copyright 2004 Sipex Corporation
7
PACKAGE: 8 PIN NSOIC
D
e
E/2
E1
E
E1/2
SEE VIEW C
1
b
INDEX AREA
(D/2 X E1/2)
Ø1
TOP VIEW
Gauge Plane
L2
Ø
Ø1
Seating Plane
L
L1
VIEW C
A2
A
SEATING PLANE
A1
SIDE VIEW
b
8 Pin NSOIC
(JEDEC MS-012,
AA - VARIATION)
DIMENSIONS
Minimum/Maximum
(mm)
WITH PLATING
COMMON HEIGHT DIMENSION
SYMBOL
MIN NOM MAX
1.75
0.25
1.65
0.51
0.25
A
1.35
-
-
-
-
-
c
A1
A2
b
c
D
E
0.10
1.25
0.31
0.17
BASE METAL
4.90 BSC
6.00 BSC
3.90 BSC
1.27 BSC
CONTACT AREA
E1
e
L
0.40
-
1.27
L1
L2
1.04 REF
0.25 BSC
8 PIN NSOIC
0º
5º
-
-
8º
Ø
Ø1
15º
Date: 05/10/04
SP490/491 Full Duplex RS-485 Transceivers
© Copyright 2004 Sipex Corporation
8
PACKAGE: 8 PIN NSOIC
D
e
E/2
E1
E
E1/2
SEE VIEW C
1
B
b
INDEX AREA
(D/2 X E1/2)
Ø1
TOP VIEW
Gauge Plane
L2
Ø
Ø1
Seating Plane
L
L1
VIEW C
A2
A
A1
SIDE VIEW
b
14 Pin NSOIC
(JEDEC MS-012,
AB - VARIATION)
DIMENSIONS
Minimum/Maximum
(mm)
WITH PLATING
COMMON HEIGHT DIMENSION
SYMBOL
MIN NOM MAX
1.75
0.25
1.65
0.51
0.25
A
-
-
-
-
-
1.35
c
A1
A2
b
c
D
E
0.10
1.25
0.31
0.17
BASE METAL
8.65 BSC
6.00 BSC
3.90 BSC
1.27 BSC
CONTACT AREA
E1
e
L
L1
L2
-
0.40
1.27
14 PIN NSOIC
1.04 REF
0.25 BSC
-
-
0º
5º
8º
Ø
Ø1
15º
Date: 05/10/04
SP490/491 Full Duplex RS-485 Transceivers
© Copyright 2004 Sipex Corporation
9
PACKAGE: 8 PIN NSOIC
A1
D
A
N
1
INDEX
AREA
A2
D1
L
E
E1
b2
b
e
b3
2
3
N/2
8 PIN PDIP
JEDEC MS-001
(BA) Variation
Dimensions in inches
MIN NOM MAX
E
A
-
-
.210
-
.015
-
A1
A2
.115
.130 .195
.022
b
.014 .018
b2
b3
.045
.030
.060 .070
.039 .045
c
eA
eB
c
D
.008
.355
.005
.010
.365
-
.014
.400
-
D1
E
.325
.280
.310
.250
.300
E1
e
.240
.100 BSC
.300 BSC
-
b
eA
-
eB
L
.430
.115
.130 .150
C
8 pin PDIP
Date: 05/10/04
SP490/491 Full Duplex RS-485 Transceivers
© Copyright 2004 Sipex Corporation
10
PACKAGE: 8 PIN NSOIC
A1
D
A
N
1
INDEX
AREA
A2
D1
L
E
E1
b2
b
e
b3
2
3
N/2
14 PIN PDIP
JEDEC MS-001
(AA) Variation
Dimensions in inches
MIN NOM MAX
E
A
-
-
.210
-
.015
-
A1
A2
.115
.130
.195
.022
b
.014 .018
b2
b3
.045
.030
.060 .070
.039 .045
c
eA
eB
c
D
.008
.735
.005
.010
.750
-
.014
.775
-
D1
E
.325
.280
.310
.250
.300
E1
e
.240
.100 BSC
.300 BSC
-
b
eA
-
eB
L
.430
.115
.130 .150
C
14 pin PDIP
Date: 05/10/04
SP490/491 Full Duplex RS-485 Transceivers
© Copyright 2004 Sipex Corporation
11
ORDERING INFORMATION
Model
Temperature Range
Package
SP490CN. ..................................................................................... 0˚C to +70˚C ............................................................................... 8-Pin NSOIC
SP490CN/TR ................................................................................ 0˚C to +70˚C ............................................................................... 8-Pin NSOIC
SP490CS ...................................................................................... 0˚C to +70˚C ................................................................................ 8-Pin PDIP
SP490EN ..................................................................................... -40˚C to +85˚C ............................................................................. 8-Pin NSOIC
SP490EN/TR ............................................................................... -40˚C to +85˚C ............................................................................. 8-Pin NSOIC
SP490ES ..................................................................................... -40˚C to +85˚C .............................................................................. 8-Pin PDIP
SP491CN ...................................................................................... 0˚C to +70˚C .............................................................................. 14-Pin NSOIC
SP491CN/TR ................................................................................ 0˚C to +70˚C .............................................................................. 14-Pin NSOIC
SP491CS ...................................................................................... 0˚C to +70˚C ............................................................................... 14-Pin PDIP
SP491EN ..................................................................................... -40˚C to +85˚C ............................................................................ 14-Pin NSOIC
SP491EN/TR ............................................................................... -40˚C to +85˚C ............................................................................ 14-Pin NSOIC
SP491ES ..................................................................................... -40˚C to +85˚C ............................................................................. 14-Pin PDIP
/TR = Tape and Reel
Pack quantity is 2500 for NSOIC.
Please consult factory for pricing and availability of various package and temperature options or price and availability of tape-
on-reel.
Corporation
ANALOG EXCELLENCE
Sipex Corporation
Headquarters and
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.
Date: 05/10/04
SP490/491 Full Duplex RS-485 Transceivers
© Copyright 2004 Sipex Corporation
12
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