SP3494EP-L [SIPEX]
Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, BICMOS, PDIP8, LEAD FREE, PLASTIC, DIP-8;
| 型号： | SP3494EP-L |
| 厂家： | 
SIPEX CORPORATION |
| 描述： | Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, BICMOS, PDIP8, LEAD FREE, PLASTIC, DIP-8 驱动 信息通信管理 光电二极管 接口集成电路 驱动器 |
| 文件： | 总11页 (文件大小：201K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
SP3493/SP3494
+3.3V Low Power
RS-485/RS-422 Transceivers
■ Operates From A Single +3.3V Supply
■ Interoperable With +5V Logic
■ +200mV Receiver Input Sensitivity
■ -7V to +12V Common-Mode Input
Voltage Range
■ Devices Allow Up To 32 Transceivers
On The Serial Bus
■ Driver/Receiver Enable Lines (SP3494)
■ 2nA Low-Power Shutdown Mode (SP3494)
■ Compatible With The MAX3488, LTC490
and 75179 Industry Standard Pinouts
(SP3493)
■ Compatible With The MAX3486 and 75176
Industry Standard Pinouts (SP3494)
Now Available in Lead-Free Packaging
DESCRIPTION
The SP3493 and the 3494 devices are +3.3V, low power transceivers that meet the
specifications of the RS-485 and RS-422 serial protocols. The SP3493 and the 3494 devices
are pin-to-pin compatible with the Sipex SP3490 and the SP3481 devices, respectively, as well
as other popular industry standards. The devices feature Sipex's BiCMOS process, allowing
low power operation without sacrificing performance. The partially slew-rate limited drivers
minimize EMI and reduce reflections caused by improperly terminated cables allowing
error-free data transmission. The SP3493 is a full-duplex low power transceiver that will
deliveradatatransmissionrateupto250kbps. TheSP3494isahalf-duplexpartiallyslew-rate
limited transceiver that will deliver a data transmission rate up to 2.5Mbps. The SP3494 is
equipped with a low-power shutdown mode and driver/receiver high-Z enable lines.
Vcc 1
8 A
RO
RE
DE
DI
1
2
3
4
8
7
6
5
V
B
A
R
CC
R 2
R
7 B
6 Z
D 3
D
5 Y
D
GND 4
GND
SP3493
SP3494
10/16/02
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
© Copyright 2002 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 ............................................................................................ +6.0V
Input Voltages
Drivers ........................................................................ -0.3V to +6.0V
Receivers ................................................................................... ±14V
Output Voltages
Drivers ....................................................................................... ±14V
Receivers .................................................................... -0.3V to +6.0V
Storage Temperature ................................................. -65˚C to +150˚
Power Dissipation per Package
8-pin PDIP (derate11.8mW/oC above +70oC) ...................... 1000mW
8-pin NSOIC (derate 6.90mW/oC above +70oC) .................... 600mW
SPECIFICATIONS
TAMB = TMIN to TMAX and VCC = 3.3V ± 5% unless otherwise noted.
PARAMETERS
MIN.
TYP.
MAX. UNITS CONDITIONS
SP3493 DRIVER
DC Characteristics
Differential Output Voltage
Differential Output Voltage
GND
2
VCC
VCC
Volts
Volts
Unloaded; R = ∞ Ω; 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
1.5
VCC
Volts
W
ith Load;R = 27 ; (RS-485); Figure 1
Ω
0.2
3
Volts
R = 27Ω or R = 50Ω; Figure 1
R = 27Ω or R = 50Ω; Figure 1
Volts
Volts
Volts
µA
Input High Voltage
2.0
Input Low Voltage
0.8
Input Current
+10
Driver Short-Circuit Current
VOUT = HIGH
+250
+250
mA
mA
-7V < VO < +12V
-7V < VO < +12V
VOUT = LOW
SP3493 DRIVER
AC Characteristics
Maximum Data Rate
Driver Input to Output, tPLH
250
400
kbps
ns
900
900
10
1500
1500
Figures 2 and 8
Figures 2 and 8
Driver Input to Output, tPHL
Differential Driver Skew
400
ns
ns
tPHL(Y) - tPLH(Y) , tPHL(Z) - tPLH(Z) ,
Figures 2 and 8
Figures 2 and 8
From 10% to 90%; Figures 3 and 9
Driver Rise or Fall Time
10
30
ns
SP3493 RECEIVER
DC Characteristics
Differential Input Threshold
Input Hysteresis
0.2
VCC-0.4
12
+0.2
0.4
Volts
mV
-7V < VCM < 12V
VCM = 0V
25
15
Output Voltage High
Output Voltage Low
Volts
Volts
kΩ
IO = -1.5mA, VID = +200mV
IO = +2.5mA, VID = -200mV
-7V < VCM < 12V
VIN = 12V
Input Resistance
Input Current (A, B); VIN = 12V
Input Current (A, B); VIN = -7V
Short-Circuit Current
1.0
-0.8
60
mA
mA
VIN = -7V
mA
0V < VO < VCC
10/16/02
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
© Copyright 2002 Sipex Corporation
2
SPECIFICATIONS (continued)
TAMB = TMIN to TMAX and VCC = 3.3V ± 5% unless otherwise noted.
PARAMETERS
MIN.
TYP.
MAX. UNITS CONDITIONS
SP3493 RECEIVER
AC Characteristics
Maximum Data Rate
250
35
kbps
Receiver Input to Output, tPLH
70
70
10
120
120
ns
ns
ns
Figures 6 and 11
Figures 6 and 11
Figures 6 and 11
Receiver Input to Output, tPHL
Differential Receiver Skew
35
SP3493 POWER REQUIREMENTS
Supply Current
1000
2000
µA
D = 0 or VCC
SP3494 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
1.5
VCC
Volts
with load; R = 27Ω; (RS-485); Figure 1
0.2
3
Volts
R = 27Ω or R = 50Ω; Figure 1
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
Input High Voltage
2.0
Input Low Voltage
0.8
Input Current
+10
Driver Short-Circuit Current
VOUT = HIGH
+250
+250
mA
mA
-7V < VO < +12V
-7V < VO < +12V
VOUT = LOW
SP3494 DRIVER
AC Characteristics
Maximum Data Rate
2.5
20
20
Mbps
ns
RE = VCC, DE = VCC
Figures 2 and 8
Driver Input to Output, tPLH
Driver Input to Output, tPHL
45
45
75
75
ns
Figures 2 and 8
Differential Driver Skew
10
30
52
60
40
60
ns
ns
ns
ns
ns
ns
tDO1 - tDO2 , Figures 2 and 9
Driver Rise or Fall Time
70
From 10% to 90%, Figures 3 and
9
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High
120
120
120
120
Figures 4 and 10
Figures 5 and 10
Figures 5 and 10
Figures 4 and 10
SP3494 RECEIVER
DC Characteristics
Differential Input Threshold
Input Hysteresis
-0.2
+0.2
Volts
mV
-7V < VCM < +12V
VCM = 0V
20
15
Output Voltage High
Output Voltage Low
VCC-0.4
Volts
Volts
VID = +200mV, -1.5mA
VID = -200mV, 2.5mA
0.4
+1
Three-State (High Impedance)
Output Current
µA
kΩ
0V < VO < VCC; RE = VCC
-7V < VCM < +12V
Input Resistance
12
7
Input Current (A, B); VIN = 12V
Input Current (A, B); VIN = -7V
Short-Circuit Current
1.0
-0.8
60
mA
mA
mA
DE = 0V, VCC = 0V or 3.6V, VIN = 12V
DE = 0V, VCC = 0V or 3.6V, VIN = -7V
0V < VCM < VCC
10/16/02
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
© Copyright 2002 Sipex Corporation
3
SPECIFICATIONS (continued)
TAMB = TMIN to TMAX and VCC = +3.3V ± 5% unless otherwise noted.
PARAMETERS
SP3494 RECEIVER
MIN.
TYP.
MAX. UNITS CONDITIONS
AC Characteristics
Maximum Data Rate
2.5
40
Mbps
ns
RE = 0V, DE = 0V
Receiver Input to Output, tPLH
70
70
10
35
100
100
Figures 6 and 11
Receiver Input to Output, tPHL
40
50
ns
ns
ns
Figures 6 and 11
Differential Receiver Skew
Receiver Enable to
Output Low
tRSKEW = tRPHL - tRPLH , Figures 6 and 11
Figures 7 and 12; S1 closed, S2 open
60
Receiver Enable to
Output High
35
35
35
60
60
60
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
Receiver Disable from Low
Receiver Disable from High
SP3494 SHUTDOWN TIMING
Time to Shutdown
75
65
65
50
50
200
150
150
200
200
ns
ns
ns
ns
ns
RE = 3.3V, DE = 0V
Driver Enable from Shutdown
to Output High
Figures 4 and 10
Driver Enable from Shutdown
to Output Low
Figures 5 and 10
Receiver Enable from
Shutdown to Output High
Receiver Enable from
Shutdown to Output Low
Figures 7 and 12; S2 closed, S1 open
Figures 7 and 12; S1 closed, S2 open
SP3494 POWER REQUIREMENTS
Supply Current
No Load
1000
800
2000
1500
µA
µA
RE, DI = 0V or VCC; DE = VCC
RE = 0V, DI = 0V or VCC; DE = 0V
Shutdown Mode
10
µA
DE = 0V, RE=VCC
10/16/02
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
© Copyright 2002 Sipex Corporation
4
PIN FUNCTION - SP3493
Pin 1 - VCC - Positive supply +3.00 < VCC < +3.60
Pin 2 - R - Receiver output.
Pin 3 - D - Driver input.
Pin 4 - GND - Ground connection.
Pin 5 - Y - Non-inverting driver output.
Pin 6 - Z - Inverting driver output.
Pin 7 - B - Inverting receiver input.
Pin 8 - A - Non-inverting receiver input.
Vcc 1
R 2
8 A
R
7 B
6 Z
D 3
D
5 Y
GND 4
SP3493
Pinout
PIN FUNCTION - SP3494
Pin 1 – RO – Receiver Output.
Pin 2 – RE – Receiver Output Enable Active LOW.
Pin 3 – DE – Driver Output Enable Active HIGH.
Pin 4 – DI – Driver Input.
RO
RE
DE
DI
1
2
3
4
8
7
6
5
V
CC
R
B
A
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
SP3494
Pinout
10/16/02
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
© Copyright 2002 Sipex Corporation
5
The SP3493/SP3494 drivers will operate up to
250kbps and 2.5Mbps, respectively. In addition
to adhering to the 250mA ISC maximum limit on
the driver output, the driver output short-circuit
protectionwillallowthedevicestowithstandan
infinite short circuit over the -7.0V to +12V
common mode range without damage.
DESCRIPTION
The SP3493/3494 are +3.3V transceivers that
meet the electrical specifications of the
RS-485 and RS-422 serial protocols. The
SP3493/3494 feature Sipex's BiCMOS process
allowing low power operation without
sacrificing performance.
Receivers
The SP3493 device is a +3.3V full-duplex
transceiver that is pin-to-pin compatible with
the Sipex SP3490 and SP490 devices as well as
popular industry standards such as the
MAX3488, the LTC490, and the 75179. The
SP3493 has a driver with a data transmission
rate of 250kbps.
The receivers have differential inputs with an
input sensitivity as low +200mV. Input
impedance of the receivers is typically 15kΩ
(12kΩminimum). Awidecommonmoderange
of-7Vto+12Vallowsforlargegroundpotential
differences between systems.
Both the SP3493/SP3494 receivers are
equipped with fail-safe which guarantees that
the receiver outputs will be in a high state
when the input is left unconnected.
The SP3494 device is a +3.3V half-duplex
transceiver that is pin-to-pin compatible with
the Sipex SP3481 and SP481 devices as well as
popularindustrystandardssuchastheMAX3486
and the 75176. The SP3494 has a partially slew-
rate limited driver with a data transmission rate
of 2.5Mbps.
The SP3494 receiver 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.
Drivers
The SP3494 is equipped with a shutdown mode.
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
onRE(pin2)willputtheSP3494intoshutdown.
Inshutdown, thesupplycurrentwilldropto2nA
typical, 1µA maximum.
TheSP3493/3494devicesbothhavedifferential
outputs. The typical voltage output swing with
no load will bo 0V to V . With worst case
loading of 54Ω across theCdCifferential outputs,
thedrivercanmaintaingreaterthan1.5Vvoltage
levels.
The SP3494 device has an enable control line
whichisactiveHIGH. AlogicHIGHonDE(pin
3) will enable the differential driver outputs.
A logic LOW on DE (pin 3) will force the driver
outputsathighimpedance(high-Z). TheSP3493
device does not have a driver enable.
10/16/02
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
© Copyright 2002 Sipex Corporation
6
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 3. Driver Differential Output Delay and
Transition Time Circuit
Figure 4. Driver Enable and Disable Timing Circuit,
output HiGH
VCC
OUT
R
L
= 110Ω
VID
R
S1
GENERATOR
(NOTE 1)
50Ω
0V OR 3V
D
OUT
C
L
= 15pF
(NOTE 2)
C
L
= 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
CL = 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
10/16/02
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
© Copyright 2002 Sipex Corporation
7
3V
0V
1.5V
1.5V
INPUT
3V
0V
IN
1.5V
1.5V
t
PLH
t
PHL
V
OH
VOM
V
OM
Y OUTPUT
t
DO1
t
DO2
V
OL
2.0V
t
PHL
t
PLH
90%
90%
V
OH
50%
10%
50%
10%
OUT
Z OUTPUT
V
OM
V
OM
-2.0V
VOL
t
TD
t
TD
OH 2
V
+ VOL
≈ 1.5V
V
OM
=
Figure 9. Driver Differential Output Delay and
Transition Time Waveforms
Figure 8. Driver Propagation Delay Waveforms
3V
1.5V
1.5V
DE
0V
3V
t
PHZ
t
PZH
INPUT
1.5V
1.5V
VOH
0.25V
0.25V
0V
OUTPUT
HIGH
V
OM
OM
t
RPLH
tRPHL
0V
VCC
VOM
OUTPUT
V
OM
t
PZL
t
PLZ
VCC
0V
OUTPUT
LOW
V
V
CC
2
VOM
=
VOL
OH 2
V
+ VOL
≈ 1.5V
V
OM
=
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
tPPRRZSLL
t
tPPRRSZHH
t
PRHZ
tPRLZ
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.
10/16/02
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
© Copyright 2002 Sipex Corporation
8
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
A2
(2.921/4.953)
0.014/0.022
B
(0.356/0.559)
0.045/0.070
B1
C
(1.143/1.778)
0.008/0.014
(0.203/0.356)
0.355/0.400
D
(9.017/10.160)
0.300/0.325
E
(7.620/8.255)
0.240/0.280
E1
L
(6.096/7.112)
0.115/0.150
(2.921/3.810)
0°/ 15°
Ø
(0°/15°)
10/16/02
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
© Copyright 2002 Sipex Corporation
9
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°)
10/16/02
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
© Copyright 2002 Sipex Corporation
10
ORDERING INFORMATION
Model
Temperature Range
0˚C to +70˚C
Package
SP3493CN
SP3493CP
SP3493EN
SP3493EP
8-pin Narrow SOIC
8-pin Plastic DIP
8-pin Narrow SOIC
8-pin Plastic DIP
0˚C to +70˚C
.-40˚C to +85˚C
-40˚C to +85˚C
SP3494CN
SP3494CP
SP3494EN
SP3494EP
0˚C to +70˚C
0˚C to +70˚C
-40˚C to +85˚C
-40˚C to +85˚C
8-pin Narrow SOIC
8-pin Plastic DIP
8-pin Narrow SOIC
8-pin Plastic DIP
Please consult the factory for pricing and availability on a Tape-On-Reel option.
Available in lead-free packaging. To order add “-L” suffix to part number.
Example: SP3493CN = standard; SP3493CN-L = lead-free.
Corporation
SIGNALPROCESSINGEXCELLENCE
Sipex Corporation
Headquarters and
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Sales Office
22 Linnell Circle
Billerica, MA 01821
TEL: (978) 667-8700
FAX: (978) 670-9001
e-mail: sales@sipex.com
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.
10/16/02
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
© Copyright 2002 Sipex Corporation
11
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HIGH SPEED +3.3V RS-485/RS-422 TRANSCEIVERS WITH +/-15KV ESD PROTECTION AND ADVANCED FAILSAFE
EXAR
SP3497EEN-L/TR
HIGH SPEED +3.3V RS-485/RS-422 TRANSCEIVERS WITH +/-15KV ESD PROTECTION AND ADVANCED FAILSAFE
EXAR
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