SIPEX SP491EEP

®
SP490E/SP491E
Enhanced Full Duplex RS-485 Transceivers
■
■
■
■
■
+5V Only
Low Power BiCMOS
Driver/Receiver Enable (SP491E)
RS-485 and RS-422 Drivers/Receivers
Pin Compatible with LTC490 and
SN75179 (SP490E)
■ Pin Compatible with LTC491 and
SN75180 (SP491E)
■ Improved ESD Specifications:
±15kV Human Body Model
±15kV IEC1000-4-2 Air Discharge
±8kV IEC1000-4-2 Contact Discharge
DESCRIPTION…
The SP490E is a low power differential line driver/receiver meeting RS-485 and RS-422
standards up to 10Mbps. The SP491E is identical to the SP490E with the addition of driver
and receiver tri-state enable lines. Both products feature ±200mV receiver input sensitivity,
over wide common mode range. The SP490E is available in 8-pin plastic DIP and 8-pin NSOIC
packages for operation over the commercial and industrial temperature ranges. The SP491E
is available in 14-pin DIP and 14-pin NSOIC packages for operation over the commercial and
industrial temperature ranges.
14 Vcc
13 NC
12 A
NC 1
R 2
Vcc 1
R
8 A
R 2
R
11 B
REB 3
7 B
DE 4
6 Z
D 3
D
GND 4
10 Z
D 5
5 Y
9 Y
GND 6
GND 7
SP490E
SP490EDS/14
D
8 NC
SP491E
SP490E Enhanced Full Duplex RS-485 Transceivers
1
© Copyright 2000 Sipex Corporation
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
SPECIFICATIONS
TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted.
PARAMETERS
SP490E DRIVER
DC Characteristics
Differential Output Voltage
Differential Output Voltage
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
Driver Short-Circuit Current
VOUT = HIGH
VOUT = LOW
MIN.
TYP.
MAX.
UNITS
CONDITIONS
GND
2
VCC
VCC
Volts
Volts
1.5
VCC
Volts
Unloaded; R = ∞; see Figure 1
With Load; R = 50Ω; (RS-422);
see Figure 1
With Load; R = 27Ω; (RS-485); see Figure 1
0.2
Volts
R = 27Ω or R = 50Ω; see Figure 1
3
0.8
±10
Volts
Volts
Volts
µA
R = 27Ω or R = 50Ω; see Figure 1
Applies to D
Applies to D
Applies to D
±250
±250
mA
mA
-7V ≤ VO ≤ +12V
-7V ≤ VO ≤ +12V
RDIFF = 54Ω, CL1 = CL2 = 100pF
tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF;
see Figures 3 and 6
tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF;
see Figures 3 and 5
see Figures 3 and 5,
tSKEW = | tDPLH - tDPHL|
From 10% to 90%; RDIFF = 54Ω,
CL1 = CL2 = 100pF; see Figures 3 and 5
2.0
SP490E DRIVER
AC Characteristics
Maximum Data Rate
Driver Input to Output
10
20
30
60
Mbps
ns
Driver Input to Output
20
30
60
ns
Driver Skew
Driver Rise or Fall Time
5
3
15
SP490E RECEIVER
DC Characteristics
Differential Input Threshold
-0.2
Input Hysteresis
Output Voltage High
3.5
Output Voltage Low
Input Resistance
12
Input Current (A, B); VIN = 12V
Input Current (A, B); VIN = -7V
Short-Circuit Current
SP490EDS/14
ns
40
+0.2
70
0.4
15
±1.0
-0.8
85
ns
Volts
mV
Volts
Volts
kΩ
mA
mA
mA
-7V ≤ VCM ≤ 12V
VCM = 0V
IO = -4mA, VID = +200mV
IO = +4mA, VID = -200mV
-7V ≤ VCM ≤ 12V
VIN = 12V
VIN = -7V
0V ≤ VO ≤ VCC
SP490E Enhanced Full Duplex RS-485 Transceivers
2
© Copyright 2000 Sipex Corporation
SPECIFICATIONS (continued)
TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted.
PARAMETERS
SP490E RECEIVER
AC Characteristics
Maximum Data Rate
Receiver Input to Output
MIN.
TYP.
MAX.
UNITS
10
20
45
100
Mbps
ns
Receiver Input to Output
20
45
100
ns
Diff. Receiver Skew ItPLH-tPHLI
13
ns
CONDITIONS
tPLH; RDIFF = 54Ω,
CL1 = CL2 = 100pF; Figures 3 & 7
tPHL; RDIFF = 54Ω,
CL1 = CL2 = 100pF; Figures 3 & 7
RDIFF = 54Ω; CL1 = CL2 = 100pF;
Figures 3 & 7
POWER REQUIREMENTS
Supply Voltage
Supply Current
ENVIRONMENTAL AND
MECHANICAL
Operating Temperature
Commercial (_C_)
Industrial (_E_)
Storage Temperature
Package
Plastic DIP (_P)
NSOIC (_N)
+4.75
+5.25
Volts
µA
+70
+85
+150
°C
°C
°C
900
0
-40
-65
A
R
VOD
VCC
S1
CRL
R
1k
Test Point
Receiver
Output
1k
VOC
S2
B
Figure 1. Driver DC Test Load Circuit
Figure 2. Receiver Timing Test Load Circuit
3V
DE
DI
CL1
A
A
RDIFF
Output
Under
Test
RO
B
B
CL2
15pF
500
S1
VCC
CL
S2
Figure 3. Driver/Receiver Timing Test Circuit
SP490EDS/14
Figure 4. Driver Timing Test Load #2 Circuit
SP490E Enhanced Full Duplex RS-485 Transceivers
3
© Copyright 2000 Sipex Corporation
f = 1MHz; tR < 10ns; tF < 10ns
+3V
1.5V
DI
1.5V
0V
DRIVER
OUTPUT
tPLH
Z
tPHL
VO 1/2VO
1/2VO
Y
tDPLH
DIFFERENTIAL VO+
OUTPUT 0V
VY – VZ VO–
tDPHL
tR
tF
tSKEW = | tDPLH - tDPHL |
Figure 5. Driver Propagation Delays
f = 1MHz; tR < 10ns; tF < 10ns
+3V
1.5V
DE
0V
1.5V
tZL
tLZ
5V
2.3V
A,
Y,BZ
VOL
VOH
A,
Y,BZ
2.3V
0V
Output normally LOW
0.5V
Output normally HIGH
0.5V
tZH
tHZ
Figure 6. Driver Enable and Disable Times
f = 1MHz; tR < 10ns; tF < 10ns
V0D2+
Y–Z
0V
VOH
1.5V
R
VOL
0V
INPUT
V0D2–
1.5V
OUTPUT
tPHL
tPLH
tSKEW = | tPHL - tPLH |
Figure 7. Receiver Propagation Delays
SP490EDS/14
SP490E Enhanced Full Duplex RS-485 Transceivers
4
© Copyright 2000 Sipex Corporation
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
SPECIFICATIONS
TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted.
PARAMETERS
SP491E DRIVER
DC Characteristics
Differential Output Voltage
Differential Output Voltage
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
Driver Short-Circuit Current
VOUT = HIGH
VOUT = LOW
MIN.
TYP.
MAX.
UNITS
CONDITIONS
GND
2
VCC
VCC
Volts
Volts
1.5
VCC
Volts
Unloaded; R = ∞ ; see Figure 1
With Load; R = 50Ω; (RS-422);
see Figure 1
With Load; R = 27Ω; (RS-485);see Figure 1
0.2
Volts
R = 27Ω or R = 50Ω; see Figure 1
3
0.8
±10
Volts
Volts
Volts
µA
R = 27Ω or R = 50Ω; see Figure 1
Applies to D, REB, DE
Applies to D, REB, DE
Applies to D, REB, DE
250
250
mA
mA
-7V ≤ VO ≤ 10V
-7V ≤ VO ≤ 10V
RDIFF = 54Ω, CL1 = CL2 = 100pF
tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF;
see Figures 3 and 5
tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF;
see Figures 3 and 5
see Figures 3 and 5,
tSKEW = | tDPLH - tDPHL |
From 10% to 90%; RDIFF = 54Ω,
CL1 = CL2 = 100pF; see Figures 3 and 5
CL1 = CL2 = 100pF; see Figures
4 and 6; S2 closed
CL1 = CL2 = 100pF; see Figures
4 and 6; S1 closed
CL1 = CL2 = 15pF; see Figures
4 and 6; S1 closed
CL1 = CL2 = 15pF; see Figures
4 and 6; S2 closed
2.0
SP491E DRIVER
AC Characteristics
Maximum Data Rate
Driver Input to Output
10
20
30
60
Mbps
ns
Driver Input to Output
20
30
60
ns
5
10
ns
15
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
Driver Skew
Driver Rise or Fall Time
SP490EDS/14
3
SP490E Enhanced Full Duplex RS-485 Transceivers
5
© Copyright 2000 Sipex Corporation
SPECIFICATIONS (continued)
TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted.
PARAMETERS
MIN.
SP491E RECEIVER
DC Characteristics
Differential Input Threshold
-0.2
Input Hysteresis
Output Voltage HIGH
3.5
Output Voltage LOW
Three State (high impedance)
Output Current
Input Resistance
12
Input Current (A, B); VIN = 12V
Input Current (A, B); VIN = -7V
Short-Circuit Current
SP491E RECEIVER
AC Characteristics
Maximum Data Rate
10
Receiver Input to Output
20
Receiver Input to Output
TYP.
MAX.
UNITS
CONDITIONS
+0.2
Volts
mV
Volts
Volts
-7V ≤ VCM ≤ 12V
VCM = 0V
IO = -4mA, VID = +200mV
IO = +4mA, VID = -200mV
±1.0
-0.8
85
µA
kΩ
mA
mA
mA
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
45
100
Mbps
ns
45
100
ns
REB = 0V, DE = 5V
tPLH; RDIFF = 54Ω,
CL1 = CL2 = 100pF; Figures 3 & 7
tPHL; RDIFF = 54Ω,
CL1 = CL2 = 100pF; Figures 3 & 7
RDIFF = 54Ω; CL1 = CL2 = 100pF;
70
0.4
±1
15
20
Diff. Receiver Skew ItPLH-tPHLI
13
Receiver Enable to Output LOW
Receiver Enable to Output HIGH
Receiver Disable from LOW
Receiver Disable from HIGH
POWER REQUIREMENTS
Supply Voltage
+4.75
Supply Current
45
45
45
45
ns
Figures 3 & 7
SP491E ENVIRONMENTAL
AND MECHANICAL
Operating Temperature
Commercial (_C_)
Industrial (_E_)
Storage Temperature
Package
Plastic DIP (_P)
NSOIC (_N)
70
70
70
70
+5.25
900
0
-40
-65
+70
+85
+150
ns
ns
ns
ns
CRL = 15pF; Figures 2 and 8; S1 closed
CRL = 15pF; Figures 2 and 8; S2 closed
CRL = 15pF; Figures 2 and 8; S1 closed
CRL = 15pF; Figures 2 and 8; S2 closed
Volts
µA
REB, D = 0V or VCC; DE = VCC
°C
°C
°C
+3V
RE
0V
1.5V f = 1MHz; t < 10ns; t < 10ns
R
F
tZL
1.5V
tLZ
5V
1.5V
R
VIL
Output normally LOW
0.5V
Output normally HIGH
0.5V
VIH
R
1.5V
0V
tZH
tHZ
Figure 8. Receiver Enable and Disable Times
SP490EDS/14
SP490E Enhanced Full Duplex RS-485 Transceivers
6
© Copyright 2000 Sipex Corporation
FEATURES
Receivers
The SP490E and SP491E 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 receivers for both the SP490E and SP491E
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
SP490E and SP491E 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.
THEORY OF OPERATION
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 receiver of the SP491E has a receiver
enable control line which is active low. A logic
low on REB (pin 3) of the SP491E will enable
the differential receiver. A logic high on REB
(pin 3) of the SP491E will tri-state the receiver.
ESD Tolerance
The SP490E/SP491E devices incorporate
ruggedized ESD cells on all driver output
and receiver input pins. The ESD structure is
improved over our previous family for more
rugged applications and environments sensitive
to electro-static discharges and associated
transients. The improved ESD tolerance is at
least ±15kV without damage nor latch-up.
Drivers
The drivers for both the SP490E and SP491E
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.
The driver of the SP491E has a driver enable
control line which is active high. A logic high on
DE (pin 4) of the SP491E will enable the differential driver outputs. A logic low on DE (pin 4)
of the SP491E will tri-state the driver outputs.
The SP490E does not have a driver enable.
RSS
RC
C
SW2
SW1
CSS
DC Power
Source
Device
Under
Test
Figure 9. ESD Test Circuit for Human Body Model
SP490EDS/14
SP490E Enhanced Full Duplex RS-485 Transceivers
7
© Copyright 2000 Sipex Corporation
Contact-Discharge Module
R
RS
S
R
RC
C
RV
SW2
SW2
SW1
SW1
Device
Under
Test
C
CS
S
DC Power
Source
RS and RV add up to 330Ω
330Ω ffor
or IEC1000-4-2.
Figure 10. ESD Test Circuit for IEC1000-4-2
There are different methods of ESD testing
applied:
a) MIL-STD-883, Method 3015.7
b) IEC1000-4-2 Air-Discharge
c) IEC1000-4-2 Direct Contact
equipment that are accessible to personnel during
normal usage. The transceiver IC receives most
of the ESD current when the ESD source is
applied to the connector pins. The test circuit for
IEC1000-4-2 is shown on Figure 10. There are
two methods within IEC1000-4-2, the Air
Discharge method and the Contact Discharge
method.
The Human Body Model has been the generally
accepted ESD testing method for semiconductors.
This method is also specified in MIL-STD-883,
Method 3015.7 for ESD testing. The premise of
this ESD test is to simulate the human body’s
potential to store electro-static energy and
discharge it to an integrated circuit. The
simulation is performed by using a test model as
shown in Figure 9. This method will test the IC’s
capability to withstand an ESD transient during
normal handling such as in manufacturing areas
where the ICs tend to be handled frequently.
i➙
With the Air Discharge Method, an ESD voltage
is applied to the equipment under test (EUT)
through air. This simulates an electrically charged
30A
The IEC-1000-4-2, formerly IEC801-2, is
generally used for testing ESD on equipment and
systems. For system manufacturers, they must
guarantee a certain amount of ESD protection
since the system itself is exposed to the outside
environment and human presence. The premise
with IEC1000-4-2 is that the system is required
to withstand an amount of static electricity when
ESD is applied to points and surfaces of the
SP490EDS/14
15A
0A
t=0ns
t=30ns
t➙
Figure 11. ESD Test Waveform for IEC1000-4-2
SP490E Enhanced Full Duplex RS-485 Transceivers
8
© Copyright 2000 Sipex Corporation
person ready to connect a cable onto the rear of
the system only to find an unpleasant zap just
before the person touches the back panel. The
high energy potential on the person discharges
through an arcing path to the rear panel of the
system before he or she even touches the system.
This energy, whether discharged directly or
through air, is predominantly a function of the
discharge current rather than the discharge
voltage. Variables with an air discharge such as
approach speed of the object carrying the ESD
potential to the system and humidity will tend to
change the discharge current. For example, the
rise time of the discharge current varies with the
approach speed.
The circuit models in Figures 9 and 10 represent
the typical ESD testing circuits used for all three
methods. The CS is initially charged with the DC
power supply when the first switch (SW1) is on.
Now that the capacitor is charged, the second
switch (SW2) is on while SW1 switches off. The
voltage stored in the capacitor is then applied
through RS, the current limiting resistor, onto the
device under test (DUT). In ESD tests, the SW2
switch is pulsed so that the device under test
receives a duration of voltage.
For the Human Body Model, the current limiting
resistor (RS) and the source capacitor (CS) are
1.5kΩ an 100pF, respectively. For IEC-1000-42, the current limiting resistor (RS) and the source
capacitor (CS) are 330Ω an 150pF, respectively.
The Contact Discharge Method applies the ESD
current directly to the EUT. This method was
devised to reduce the unpredictability of the
ESD arc. The discharge current rise time is
constant since the energy is directly transferred
without the air-gap arc. In situations such as
hand held systems, the ESD charge can be directly
discharged to the equipment from a person already
holding the equipment. The current is transferred
on to the keypad or the serial port of the equipment
directly and then travels through the PCB and
finally to the IC.
SP490E/SP491E
Family
Driver Outputs
Receiver Inputs
HUMAN BODY
MODEL
±15kV
±15kV
The higher CS value and lower RS value in the
IEC1000-4-2 model are more stringent than the
Human Body Model. The larger storage capacitor
injects a higher voltage to the test point when
SW2 is switched on. The lower current limiting
resistor increases the current charge onto the test
point.
Air Discharge
±15kV
±15kV
IEC1000-4-2
Direct Contact
±8kV
±8kV
Level
4
4
Table 1. Transceiver ESD Tolerance Levels
SP490EDS/14
SP490E Enhanced Full Duplex RS-485 Transceivers
9
© Copyright 2000 Sipex Corporation
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
L
B1
B
e = 0.100 BSC
(2.540 BSC)
Ø
eA = 0.300 BSC
(7.620 BSC)
ALTERNATE
END PINS
(BOTH ENDS)
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
8–PIN
14–PIN
16–PIN
18–PIN
20–PIN
22–PIN
A2
0.115/0.195
(2.921/4.953)
0.115/0.195
(2.921/4.953)
0.115/0.195
(2.921/4.953)
0.115/0.195
(2.921/4.953)
0.115/0.195
(2.921/4.953)
0.115/0.195
(2.921/4.953)
B
0.014/0.022
(0.356/0.559)
0.014/0.022
(0.356/0.559)
0.014/0.022
(0.356/0.559)
0.014/0.022
(0.356/0.559)
0.014/0.022
(0.356/0.559)
0.014/0.022
(0.356/0.559)
B1
0.045/0.070
(1.143/1.778)
0.045/0.070
(1.143/1.778)
0.045/0.070
(1.143/1.778)
0.045/0.070
(1.143/1.778)
0.045/0.070
(1.143/1.778)
0.045/0.070
(1.143/1.778)
C
0.008/0.014
(0.203/0.356)
0.008/0.014
(0.203/0.356)
0.008/0.014
(0.203/0.356)
0.008/0.014
(0.203/0.356)
0.008/0.014
(0.203/0.356)
0.008/0.014
(0.203/0.356)
D
0.355/0.400
0.735/0.775
0.780/0.800
0.880/0.920
0.980/1.060
1.145/1.155
(9.017/10.160) (18.669/19.685) (19.812/20.320) (22.352/23.368) (24.892/26.924) (29.083/29.337)
E
0.300/0.325
(7.620/8.255)
0.300/0.325
(7.620/8.255)
0.300/0.325
(7.620/8.255)
0.300/0.325
(7.620/8.255)
0.300/0.325
(7.620/8.255)
0.300/0.325
(7.620/8.255)
E1
0.240/0.280
(6.096/7.112)
0.240/0.280
(6.096/7.112)
0.240/0.280
(6.096/7.112)
0.240/0.280
(6.096/7.112)
0.240/0.280
(6.096/7.112)
0.240/0.280
(6.096/7.112)
L
0.115/0.150
(2.921/3.810)
0.115/0.150
(2.921/3.810)
0.115/0.150
(2.921/3.810)
0.115/0.150
(2.921/3.810)
0.115/0.150
(2.921/3.810)
0.115/0.150
(2.921/3.810)
Ø
0°/ 15°
(0°/15°)
0°/ 15°
(0°/15°)
0°/ 15°
(0°/15°)
0°/ 15°
(0°/15°)
0°/ 15°
(0°/15°)
0°/ 15°
(0°/15°)
SP490EDS/14
SP490E Enhanced Full Duplex RS-485 Transceivers
10
© Copyright 2000 Sipex Corporation
PACKAGE: PLASTIC
SMALL OUTLINE (SOIC)
(NARROW)
E
H
h x 45°
D
A
Ø
e
B
DIMENSIONS (Inches)
Minimum/Maximum
(mm)
SP490EDS/14
A1
L
8–PIN
14–PIN
16–PIN
A
0.053/0.069
(1.346/1.748)
0.053/0.069
(1.346/1.748)
0.053/0.069
(1.346/1.748)
A1
0.004/0.010
(0.102/0.249
0.004/0.010
(0.102/0.249)
0.004/0.010
(0.102/0.249)
B
0.014/0.019
(0.35/0.49)
0.013/0.020
(0.330/0.508)
0.013/0.020
(0.330/0.508)
D
0.189/0.197
(4.80/5.00)
0.337/0.344
0.386/0.394
(8.552/8.748) (9.802/10.000)
E
0.150/0.157
(3.802/3.988)
0.150/0.157
(3.802/3.988)
0.150/0.157
(3.802/3.988)
e
0.050 BSC
(1.270 BSC)
0.050 BSC
(1.270 BSC)
0.050 BSC
(1.270 BSC)
H
0.228/0.244
(5.801/6.198)
0.228/0.244
(5.801/6.198)
0.228/0.244
(5.801/6.198)
h
0.010/0.020
(0.254/0.498)
0.010/0.020
(0.254/0.498)
0.010/0.020
(0.254/0.498)
L
0.016/0.050
(0.406/1.270)
0.016/0.050
(0.406/1.270)
0.016/0.050
(0.406/1.270)
Ø
0°/8°
(0°/8°)
0°/8°
(0°/8°)
0°/8°
(0°/8°)
SP490E Enhanced Full Duplex RS-485 Transceivers
11
© Copyright 2000 Sipex Corporation
ORDERING INFORMATION
Model
Temperature Range
Package
SP490ECN. ...................................................... 0˚C to +70˚C ..................................................... 8-Pin NSOIC
SP490ECP ........................................................ 0˚C to +70˚C ........................................................... 8-Pin DIP
SP490EEN. ..................................................... -40˚C to +85˚C ................................................... 8-Pin NSOIC
SP490EEP ...................................................... -40˚C to +85˚C ......................................................... 8-Pin DIP
SP491ECN ....................................................... 0˚C to +70˚C ................................................... 14-Pin NSOIC
SP491ECP ........................................................ 0˚C to +70˚C ......................................................... 14-Pin DIP
SP491EEN. ..................................................... -40˚C to +85˚C ................................................. 14-Pin NSOIC
SP491EEP ...................................................... -40˚C to +85˚C ....................................................... 14-Pin DIP
Please consult the factory for pricing and availability on a Tape-On-Reel option.
Corporation
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: [email protected]
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.
SP490EDS/14
SP490E Enhanced Full Duplex RS-485 Transceivers
12
© Copyright 2000 Sipex Corporation