SP491 SIPEX [Sipex Corporation], SP491 Datasheet

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SP491

Manufacturer Part Number
SP491
Description
Full Duplex RS-485 Transceivers
Manufacturer
SIPEX [Sipex Corporation]
Datasheet

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Date: 05/10/04
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.
+5V Only
Low Power BiCMOS
Driver/Receiver Enable (SP491)
RS-485 and RS-422 Drivers/Receivers
Pin Compatible with LTC490 and
Pin Compatible with LTC491 and
SN75179 (SP490)
SN75180 (SP491)
GND
Vcc
R
D
4
1
2
3
®
SP490
D
R
Full Duplex RS-485 Transceivers
6
SP490/491 Full Duplex RS-485 Transceivers
8
7
5
A
B
Z
Y
1
GND
GND
REB
NC
DE
R
D
1
2
3
4
5
6
7
SP491
SP490/SP491
D
R
© Copyright 2004 Sipex Corporation
BLOCK DIAGRAMS
DESCRIPTION
14
13
12
11
10
9
8
Vcc
NC
A
B
Z
Y
NC

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SP491 Summary of contents

Page 1

... SN75180 (SP491) 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 ...

Page 2

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 ...

Page 3

and ± 5% unless otherwise noted. MIN MAX CC PARAMETERS MIN. SP490 RECEIVER AC Characteristics Maximum Data Rate Receiver Input to Output Receiver Input to Output Diff. Receiver Skew PLH PHL ...

Page 4

DRIVER DRIVER OUTPUT OUTPUT A + DIFFERENTIAL DIFFERENTIAL OUTPUT OUTPUT – – SKEW = SKEW = DPLH - DPLH - ...

Page 5

... Input Low Voltage Input Current Driver Short-Circuit Current V = HIGH OUT V = LOW OUT SP491 DRIVER AC Characteristics Maximum Data Rate Driver Input to Output Driver Input to Output Driver Skew Driver Rise or Fall Time Driver Enable to Output High Driver Enable to Output Low Driver Disable Time from Low ...

Page 6

... PHL 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 SP491 ENVIRONMENTAL AND MECHANICAL Operating Temperature Commercial (_C_) Industrial (_E_) Storage Temperature Package Plastic DIP (_S_) NSOIC (_N) +3V 1 ...

Page 7

... 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. SP490/491 Full Duplex RS-485 Transceivers 7 © ...

Page 8

D e E/2 1 INDEX AREA (D/2 X E1/2) TOP VIEW SIDE VIEW 8 Pin NSOIC DIMENSIONS (JEDEC MS-012, Minimum/Maximum AA - VARIATION) (mm) COMMON HEIGHT DIMENSION SYMBOL MIN NOM MAX A - 1.35 A1 0.10 - ...

Page 9

INDEX AREA (D/2 X E1/2) TOP VIEW SIDE VIEW 14 Pin NSOIC DIMENSIONS (JEDEC MS-012, Minimum/Maximum AB - VARIATION) (mm) COMMON HEIGHT DIMENSION SYMBOL MIN NOM MAX A - 1.75 1.35 ...

Page 10

PIN PDIP Dimensions in inches JEDEC MS-001 (BA) Variation MIN A - .015 A1 A2 .115 b .014 b2 .045 b3 .030 c .008 D .355 D1 .005 E .300 E1 .240 ...

Page 11

PIN PDIP Dimensions in inches JEDEC MS-001 (AA) Variation MIN A - .015 A1 A2 .115 b .014 b2 .045 b3 .030 c .008 D .735 D1 .005 E .300 E1 .240 ...

Page 12

... 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. ...

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