SP3485CN Sipex Corporation, SP3485CN Datasheet

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SP3485CN

Manufacturer Part Number
SP3485CN
Description
+3.3V low power half-dupiex RS-485 transceives with 10Mbps data rate
Manufacturer
Sipex Corporation
Datasheet

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DESCRIPTION
The SP3481 and the SP3485 are a family of +3.3V low power half-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 SP481, SP483, and SP485 devices as well as popular industry
standards. The SP3481 and the SP3485 feature Sipex's BiCMOS process, allowing low power
operation without sacrificing performance. The SP3481 and SP3485 meet the electrical
specifications of RS-485 and RS-422 serial protocols up to 10Mbps under load. The SP3481
is equipped with a low power Shutdown mode.
SP3481/3485DS/21
RS-485 and RS-422 Transceivers
Operates from a single +3.3V supply
Interoperable with +5.0V logic
Driver/Receiver Enable
Low Power Shutdown Mode (SP3481)
-7V to +12V Common-Mode Input
Voltage Range
Allows up to 32 transceivers on
the serial bus
Compatibility with the industry
standard 75176 pinout
Driver Output Short-Circuit Protection
+3.3V Low Power Half-Duplex RS-485
®
Transceivers with 10Mbps Data Rate
RO
RE
DE
RE
DI
SP3481/3485 Low Power Half-Duplex RS485 Transceivers
1
2
3
4
SP3481 and SP3485
D
R
1
SP3481/SP3485
8
7
6
5
Vcc
B
A
GND
© Copyright 2000 Sipex Corporation

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SP3485CN Summary of contents

Page 1

... RS-485 and RS-422 serial protocols up to 10Mbps under load. The SP3481 is equipped with a low power Shutdown mode SP3481/3485DS/ SP3481 and SP3485 SP3481/3485 Low Power Half-Duplex RS485 Transceivers 1 SP3481/SP3485 8 Vcc GND © Copyright 2000 Sipex Corporation ...

Page 2

... From 10% to 90% ; Figures 3 and 9 Figures 4 and 10 Figures 5 and 10 Figures 5 and 10 Figures 4 and 10 -7V V +12V +200mV, -1.5mA -200mV, 2.5mA -7V V +12V 0V 3.6V 12V 0V 3.6V - © Copyright 2000 Sipex Corporation ...

Page 3

... S open 1 2 Figures 7 and closed, S open 3.3V Figures 4 and 10 Figures 5 and 10 Figures 7 and 12; S closed, S open 2 1 Figures 7 and 12; S closed, S open 0V, RE=V CC © Copyright 2000 Sipex Corporation ...

Page 4

... A logic LOW on DE (pin 3) and a logic HIGH on RE (pin 2) will put the SP3481 into Shutdown mode. In Shutdown, supply current will drop to typical maximum. SC SP3481/3485 Low Power Half-Duplex RS485 Transceivers 4 (12k minimum). © Copyright 2000 Sipex Corporation ...

Page 5

... OUT 15pF L (NOTE 1. OUT R = 110 50pF L (NOTE 1. OUT 15pF L (NOTE OUTPUTS +0. -0. Inputs Open © Copyright 2000 Sipex Corporation ...

Page 6

... PRSH V CC OUTPUT 1. < 6.0ns SP3481/3485 Low Power Half-Duplex RS485 Transceivers 6 3V 1.5V 1. DO1 DO2 2.0V 90% 90% 50% 10% -2. 1.5V 1. RPLH RPHL closed S2 is open S3 = -1.5V 1.5V 1.5V t PRZL t PRLZ t PRSL 1.5V 10% © Copyright 2000 Sipex Corporation ...

Page 7

... E 0.300/0.325 (7.620/8.255) E1 0.240/0.280 (6.096/7.112) 0.115/0.150 L (2.921/3.810) 0°/ 15° Ø (0°/15°) SP3481/3485 Low Power Half-Duplex RS485 Transceivers 7 DUAL–IN–LINE (NARROW) C Ø 0.300 BSC A (7.620 BSC) © Copyright 2000 Sipex Corporation ...

Page 8

... D 0.189/0.197 (4.80/5.00) E 0.150/0.157 (3.802/3.988) e 0.050 BSC (1.270 BSC) H 0.228/0.244 (5.801/6.198) h 0.010/0.020 (0.254/0.498) L 0.016/0.050 (0.406/1.270) Ø 0°/8° (0°/8°) SP3481/3485 Low Power Half-Duplex RS485 Transceivers 8 Ø L © Copyright 2000 Sipex Corporation ...

Page 9

... SP3481CP .................................................................................... 0˚C to +70˚C ................................................................................ 8-pin Plastic DIP SP3481EN .................................................................................. .-40˚C to +85˚C .......................................................................... 8-pin Narrow SOIC SP3481EP ................................................................................... -40˚C to +85˚C .............................................................................. 8-pin Plastic DIP SP3485CN .................................................................................... 0˚C to +70˚C ............................................................................ 8-pin Narrow SOIC SP3485CP .................................................................................... 0˚C to +70˚C ................................................................................ 8-pin Plastic DIP SP3485EN ................................................................................... -40˚C to +85˚C .......................................................................... 8-pin Narrow SOIC SP3485EP ................................................................................... -40˚ ...

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