EXAR SP490EN/TR

SP490 and SP491
Full Duplex RS-485 Transceivers
FEATURES
• +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)
Now Available in Lead Free Packaging
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
SP490
SP491
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com
SP490,491_100_071408
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device at
these ratings or any other above those indicated in the operation sections
of the specifications below is not implied. Exposure to absolute maximum
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
GND
VCC Volts
Unloaded; R = ∞ ; see figure 1
Differential Output Voltage
2
VCC Volts
With Load; R = 50Ω; (RS422);
see figure 1
Differential Output Voltage1.5
VCC Volts
With Load; R = 27Ω; (RS485); see
figure 1
Change in Magnitude of Driver
Differential Output Voltage for
Complimentary States
0.2 Volts
R = 27Ω or R = 50Ω; see figure 1
Driver Common-Mode
Output Voltage
3
Volts
R = 27Ω or R = 50Ω; see figure 1
Input High Voltage
2.0
Volts
Applies to D
Input Low Voltage
0.8 Volts
Applies to D
Input Current
±10 µA
Applies to D
Driver Short-Circuit Current
VOUT = HIGH
35
250 mA‑7V ≤ VO ≤ +12V
VOUT = LOW
35
250 mA‑7V ≤ VO ≤ +12V
SP490 DRIVER
AC Characteristics
Maximum Data Rate
5
Mbps
Driver Input to Output
30
60
ns
Driver Input to Output
30
60
ns
Driver Skew
5
ns
Driver Rise or Fall Time15
40
ns
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,
tSKEW = | tDPLH - tDPHL |
From 10% to 90%; RDIFF = 54Ω,
CL1 = CL2 = 100pF; see figures 3 and 6
SP490 RECEIVER
DC Characteristics
Differential Input Threshold
0.2
+0.2
Input Hysteresis
70
Output Voltage High
3.5
Output Voltage Low 0.4
Input Resistance
12
15
Input Current (A, B); VIN = 12V
±1.0
Input Current (A, B); VIN = -7V
-0.8
Short-Circuit Current
85
Volts‑7V ≤ VCM ≤ 12V
mV
VCM = 0V
Volts
IO = ‑4mA, VID = +200mV
Volts
IO = +4mA, VID = ‑200mV
kΩ‑7V ≤ VCM ≤ 12V
mA
VIN = 12V
mA
VIN = -7V
mA
0V ≤ VO ≤ VCC
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com
SP490,491_100_071408
ELECTRICAL CHARACTERISTICS
TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted.
PARAMETERS
SP490 RECEIVER
MIN.
TYP.
MAX. UNITS
AC Characteristics
Maximum Data Rate
5
Mbps
Receiver Input to Output
90150 ns
Receiver Input to Output
90150 ns
Diff. Receiver Skew ItPLH-tPHLI13
ns
CONDITIONS
tPLH; RDIFF = 54Ω,
CL1 = CL2 = 100pF; Figures 3 & 8
tPHL; RDIFF = 54Ω,
CL1 = CL2 = 100pF; Figures 3 & 8
RDIFF = 54Ω; CL1 = CL2 = 100pF;
Figures 3 & 8
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
Plastic DIP (_S)
NSOIC (_N)
0
-40
-65
+70 °C
+85 °C
+150 °C
Figure 1. Driver DC Test Load Circuit
Figure 2. Receiver Timing Test Load Circuit
Figure 3. Driver/Receiver Timing Test Circuit
Figure 4. Driver Timing Test Load #2 Circuit
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com
SP490,491_100_071408
Figure 6. Driver Propagation Delays
Figure 7. Driver Enable and Disable Times
Figure 8. Receiver Propagation Delays
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com
SP490,491_100_071408
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device
at these ratings or any other above those indicated in the operation
sections of the specifications below is not implied. Exposure to
absolute maximum 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
SP491 DRIVER
MIN.
TYP.
MAX. UNITS
CONDITIONS
DC Characteristics
Differential Output Voltage
GND
VCC Volts
Unloaded; R = ∞ ; see figure 1
Differential Output Voltage
2
VCC Volts
With Load; R = 50Ω; (RS422);
see figure 1
Differential Output Voltage1.5
VCC Volts
With Load; R = 27Ω; (RS485); see
figure 1
Change in Magnitude of Driver
Differential Output Voltage for
Complimentary States
0.2 Volts
R = 27Ω or R = 50Ω; see figure 1
Driver Common-Mode
Output Voltage
3
Volts
R = 27Ω or R = 50Ω; see figure 1
Input High Voltage
2.0
Volts
Applies to D, REB, DE
Input Low Voltage
0.8 Volts
Applies to D, REB, DE
Input Current
±10 µA
Applies to D, REB, DE
Driver Short-Circuit Current
VOUT = HIGH
35
250 mA‑7V ≤ VO ≤ 12V
VOUT = LOW
35
250 mA‑7V ≤ VO ≤ 12V
SP491 DRIVER
AC Characteristics
Maximum Data Rate
5
Mbps
Driver Input to Output
20
30
60
ns
Driver Input to Output
20
30
60
ns
Driver Skew
510
ns
Driver Rise or Fall Time
315
40
ns
Driver Enable to Output High
40
70
ns
Driver Enable to Output Low
40
70
ns
Driver Disable Time from Low
40
70
ns
Driver Disable Time from High
40
70
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,
tSKEW = | tDPLH - tDPHL |
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
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com
SP490,491_100_071408
ELECTRICAL CHARACTERISTICS
TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted.
PARAMETERS
MIN.
TYP.
MAX.
SP491 RECEIVER
DC Characteristics
Differential Input Threshold
-0.2
+0.2
Input Hysteresis
70
Output Voltage High
3.5
Output Voltage Low 0.4
Three State (high impedance)
Output Current
±1
Input Resistance
12
15
Input Current (A, B); VIN = 12V
±1.0
Input Current (A, B); VIN = -7V
-0.8
Short-Circuit Current
7
85
UNITS
Volts‑7V ≤ VCM ≤ 12V
mV
VCM = 0V
Volts
IO = ‑4mA, VID = +200mV
Volts
IO = +4mA, VID = ‑200mV
µA
0.4V ≤ VO ≤ 2.4V; REB = 5V
kΩ‑7V ≤ VCM ≤ 12V
mA
DE = 0V, VCC = 0V or 5.25V, VIN = 12V
mA
DE = 0V, VCC = 0V or 5.25V, VIN = -7V
mA
0V ≤ VO ≤ VCC
SP491 RECEIVER
AC Characteristics
Maximum Data Rate
5
Mbps
Receiver Input to Output
60
90150 ns
Receiver Input to Output
60
90150 ns
Diff. Receiver Skew ItPLH-tPHLI13
ns
Receiver Enable to Output Low
20
50
ns
Receiver Enable to Output High
20
50
ns
Receiver Disable from Low
20
50
ns
Receiver Disable from High
20
50
ns
POWER REQUIREMENTS
Supply Voltage
+4.75
+5.25
Supply Current 600
SP491 ENVIRONMENTAL
AND MECHANICAL
Operating Temperature
Commercial (C_)
0
+70
Industrial (E_)
-40
+85
Storage Temperature
-65
+150
Package
Plastic DIP (_S)
NSOIC (_N)
CONDITIONS
Volts
µA
REB = 0V
tPLH; RDIFF = 54Ω,
CL1 = CL2 = 100pF; Figures 3 & 8
tPHL; RDIFF = 54Ω,
CL1 = CL2 = 100pF; Figures 3 & 8
RDIFF = 54Ω; CL1 = CL2 = 100pF;
Figures 3 & 8
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
REB, D = 0V or VCC; DE = VCC °C
°C
°C
Figure 9. Receiver Enable and Disable Times
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com
SP490,491_100_071408
DESCRIPTION
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.
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.
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.
Receiver...
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.
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com
SP490,491_100_071408
Package: 8 Pin nSOIC
D
Ø
e
E/2
L2
E1/2 E1
E
Seating Plane
Ø1
L1
1
Gauge Plane
VIEW C
b
INDEX AREA
(D/2 X E1/2)
Ø
L
T OP VIEW
A1
A
Seating Plane
A2
8 Pin NSOIC JEDEC MO-012 (AA) Variation
SYMBOL
MIN
NOM
MAX
A
1.35
1.75
A1
0.1
0.25
A2
1.25
1.65
b
0.31
0.51
c
0.17
0.24
D
4.90 BSC
E
6.00 BSC
E1
3.90 BSC
e
1.27 BSC
L
0.4
1.27
L1
1.04 REF
L2
0.25 BSC
ø
0º
8º
ø1
5º
15º
SIDE VIEW
B
B
SEE VIEW C
b
c
Note: Dimensions in (mm)
BASE MET AL
SECTION B-B
WITH PLA TING
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com
SP490,491_100_071408
Package: 14 Pin nSOIC
D
Ø
e
E/2
L2
E1
E
E1/2
Seating Plane
Ø1
L1
Gauge Plane
VIEW C
1
INDEX AREA
(D/2 X E1/2)
Ø
L
b
TOP VIEW
A1
A
Seating Plane
SIDE VIEW
A2
14 Pin NSOIC JEDEC MO-012 (AB) Variation
MIN
NOM
MAX
SYMBOL
A
1.35
1.75
A1
0.1
0.25
A2
1.25
1.65
b
0.31
0.51
c
0.17
0.25
D
8.65 BSC
E
6.00 BSC
E1
3.90 BSC
e
1.27 BSC
L
0.4
1.27
L1
1.04 REF
L2
0.25 BSC
ø
0º
8º
ø1
5º
15º
B
B
SEE VIEW C
b
c
Note: Dimensions in (mm)
BASE MET AL
SECTION B-B
WITH PLA TING
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com
SP490,491_100_071408
Package: 8 Pin PDIP
N
E
INDEX
AREA
E1
1
2
3
E
N/2
c
eA
A1
eB
D
A
e
A2
D1
L
b3
b
b2
b
c
8 PIN PDIP JEDEC MS-001 (BA) Variation
SYMBOL
MIN
NOM
MAX
A
0.21
A1
0.15
A2
0.115
0.13
0.195
b
0.014
0.018
0.022
b2
0.045
0.06
0.07
b3
0.3
0.039
0.045
c
0.008
0.01
0.014
D
0.355
0.365
0.4
D1
0.005
E
0.3
0.31
0.325
E1
0.24
0.25
0.28
e
.100 BSC
eA
.300 BSC
eB
0.43
L
0.115
0.13
0.15
Note: Dimensions in (mm)
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com
10
SP490,491_100_071408
Package: 14 Pin PDIP
N
E
INDEX
AREA
E1
1
2
3
E
N/2
c
eA
eB
A1
D
A
e
D1
A2
L
b3
b2
b
14 PIN PDIP JEDEC MS-001 (AA) Variation
SYMBOL
MIN
NOM
MAX
A
0.21
A1
0.15
A2
0.115
0.13
0.195
b
0.014
0.018
0.022
b2
0.045
0.06
0.07
b3
0.3
0.039
0.045
c
0.008
0.01
0.014
D
0.735
0.75
0.755
D1
0.005
E
0.3
0.31
0.325
E1
0.24
0.25
0.28
e
.100 BSC
eA
.300 BSC
eB
0.43
L
0.115
0.13
0.15
Note: Dimensions in (mm)
b
c
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com
11
SP490,491_100_071408
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
Available in lead free packaging. To order add "-L" suffix to part number.
Example: SP491CN/TR = standard; SP491CN-L/TR = lead free
/TR = Tape and Reel
Pack quantity is 2500 for NSOIC.
REVISION HISTORY
Date
02/24/05
07/14/08
Revision
1.0.0
Description
Sipex Legacy Data Sheet
Convert to Exar format.
Notice
EXAR Corporation reserves the right to make changes to any products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no representation that the circuits are free of patent infringement. Charts and schedules contained herein are only for
illustration purposes and may vary depending upon a user's specific application. While the information in this publication has been carefully checked;
no responsibility, however, is assumed for inaccuracies.
EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can
reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for
use in such applications unless EXAR Corporation receives, in writting, assurances to its satisfaction that: (a) the risk of injury or damage has been
minimized ; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances.
Copyright 2008 EXAR Corporation
Datasheet June 2008
Send your Interface technical inquiry with technical details to: [email protected]
Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com
12
SP490,491_100_071408