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PDF SP3490 Data sheet ( Hoja de datos )
| Número de pieza | SP3490 | |
| Descripción | +3.3V Low Power Full Duplex RS-485 Transceivers with 10Mbps Data Rate | |
| Fabricantes | Sipex | |
| Logotipo |  |
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® SP3490/SP3491
+3.3V Low Power Full Duplex RS-485
Transceivers with 10Mbps Data Rate
■ Full Duplex RS-485 and RS-422
Transceivers
■ Operates from a single +3.3V supply
■ Interoperable with +5.0V logic
■ Driver/Receiver Tri-state Enable
Lines (SP3491)
■ -7V to +12V Common-Mode Input
Voltage Range
■ +200mV Receiver Input Sensitivity
■ Allows up to 32 transceivers on
the serial bus
■ Compatibility with LTC490
and SN75179 (SP3490)
■ Compatibility with LTC491
and SN75180 (SP3491)
DESCRIPTION
The SP3490 and the SP3491 are +3.3V low power full duplex transceivers that meet the
specifications of the RS-485 and RS-422 serial protocols. These devices are pin-to-pin
compatible with the Sipex SP490 and SP491 devices as well as popular industry standards.
The SP3490 and the SP3491 feature Sipex's BiCMOS process, allowing low power operation
without sacrificing performance. The SP3490 and SP3491 meet the electrical specifications
of RS-485 and RS-422 serial protocols up to 10Mbps under load. The SP3491 is identical to
the SP3490 with the addition of driver and receiver tri-state enable lines.
Vcc 1
R2
R
D3
GND 4
D
8A
7B
6Z
5Y
NC 1
R2
REB 3
DE 4
D5
GND 6
GND 7
R
D
14 Vcc
13 NC
12 A
11 B
10 Z
9Y
8 NC
SP3490
SP3491
Rev. 10/11/02
SP3490/3491 Low Power Full-Duplex RS485 Transceivers
1
© Copyright 2002 Sipex Corporation
1 page  
SPECIFICATIONS
TAMB = TMIN to TMAX and VCC = +3.3V ± 5% unless otherwise noted.
PARAMETERS
MIN. TYP.
SP3491 DRIVER
DC Characteristics
Differential Output Voltage
Differential Output Voltage
GND
2
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
1.5
2.0
SP3491 DRIVER
AC Characteristics
Maximum Data Rate
Driver Input to Output, tPLH
Driver Input to Output, tPHL
Differential Driver Skew
10
20
20
40
40
2
Driver Rise or Fall Time
Driver Enable to Output HIGH
Driver Enable to Output LOW
Driver Disable from LOW
Driver Disable from HIGH
5
52
60
40
60
MAX. UNITS CONDITIONS
VCC Volts Unloaded; R = ∞; Figure 1
VCC Volts With Load; R = 50Ω; (RS-422);
Figure 1
VCC Volts With Load; R = 27Ω; (RS-485); Figure 1
0.2
3
0.8
+10
+250
+250
Volts
Volts
Volts
Volts
µA
mA
mA
R = 27Ω or R = 50Ω; Figure 1
R = 27Ω or R = 50Ω; Figure 1
Applies to D, REB, DE
Applies to D, REB, DE
Applies to D, REB, DE
-7V < VO < +12V
-7V < VO < +12V
Mbps
60 ns Figures 2 and 8
60 ns Figures 2 and 8
ns tPHL(Y) - tPLH(Y) , tPHL(Z) - tPLH(Z) ,
Figures 2 and 8
20 ns From 10% to 90%; Figures 3 and 9
120 ns Figures 4 and 10
120 ns Figures 5 and 10
120 ns Figures 5 and 10
120 ns Figures 4 and 10
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.
Rev. 10/11/02
SP3490/3491 Low Power Full-Duplex RS485 Transceivers
5
© Copyright 2002 Sipex Corporation
5 Page 
ORDERING INFORMATION
Model
Temperature Range
Package
SP3490CN 0˚C to +70˚C 8-Pin NSOIC○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
○○○○○○○○○○○○○○○○○
SP3490CP 0˚C to +70˚C 8-Pin DIP○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
○○○○○○○○○○○○○○○○○○
SP3490EN -40˚C to +85˚C 8-Pin NSOIC○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
○○○○○○○○○○○○○○○○○
SP3490EP -40˚C to +85˚C 8-Pin DIP○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
○○○○○○○○○○○○○○○○○○
SP3491CN 0˚C to +70˚C 14-Pin NSOIC○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
○○○○○○○○○○○○○○○○○
SP3491CP 0˚C to +70˚C 14-Pin DIP○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
○○○○○○○○○○○○○○○○○○
SP3491EN. -40˚C to +85˚C 14-Pin NSOIC○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
○○○○○○○○○○○○○○○○○
SP3491EP -40˚C to +85˚C 14-Pin DIP○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
○○○○○○○○○○○○○○○○○○
Please consult the factory for pricing and availability on a Tape-On-Reel option.
Corporation
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: [email protected]
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.
Rev. 10/11/02
SP3490/3491 Low Power Full-Duplex RS485 Transceivers
11
© Copyright 2002 Sipex Corporation
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet SP3490.PDF ] | |
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