SP485CS Sipex Corporation, SP485CS Datasheet

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SP485CS

Manufacturer Part Number
SP485CS
Description
Low power half-duplex RS-485 transceivers
Manufacturer
Sipex Corporation
Datasheet

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Rev. 07/16/02
DESCRIPTION
The SP481, SP483, and the SP485 are a family of half-duplex transceivers that meet the
requirements of RS-485 and RS-422. Their BiCMOS design allows low power operation
without sacrificing performance. The SP481 and SP485 meet the requirements of RS-485
and RS-422 up to 5Mbps. Additionally, the SP481 is equipped with a low power Shutdown
mode. The SP483 is internally slew rate limited to reduce EMI and can meet the requirements
of RS-485 and RS-422 up to 250kbps. The SP483 is also equipped with a low power
Shutdown mode.
+5V Only
Low Power BiCMOS
Driver/Receiver Enable
Slew Rate Limited Driver for
Low EMI (SP483)
Low Power Shutdown Mode (SP481
and SP483)
RS-485 and RS-422 Drivers/Receivers
Low Power Half-Duplex RS-485 Transceivers
RO
RE
DE
RE
SP481/483/485 Low Power Half-Duplex RS485 Transceivers
DI
1
2
3
4
SP481, SP483, and SP485
D
R
1
SP481/SP483/SP485
8
7
6
5
Vcc
B
A
GND
© Copyright 2002 Sipex Corporation

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SP485CS Summary of contents

Page 1

... RS-485 and RS-422 up to 250kbps. The SP483 is also equipped with a low power Shutdown mode Rev. 07/16/02 SP481/483/485 Low Power Half-Duplex RS485 Transceivers SP481/SP483/SP485 SP481, SP483, and SP485 1 8 Vcc GND © Copyright 2002 Sipex Corporation ...

Page 2

... S closed L 2 -7V ≤ V ≤ +12V -4mA +200mV +4mA -200mV O ID 0.4V ≤ V ≤ 2.4V -7V ≤ V ≤ +12V 0V 5.25V 12V 0V 5.25V - ≤ V ≤ © Copyright 2002 Sipex Corporation ...

Page 3

... See figures 4 & closed 15pF; See figures 2 & closed 15pF; See figures 2 & closed RE=0V 5V 0V, RE=V CC © Copyright 2002 Sipex Corporation ...

Page 4

... See figures 4 & closed L 1 Description Receiver Output. Receiver Output Enable Active LOW. Driver Output Enable Active HIGH. Driver Input. Ground Connection. Driver Output/Receiver Input Non-inverting. Driver Output/Receiver Input Inverting. Positive Supply 4.75V<Vcc< 5.25V. © Copyright 2002 Sipex Corporation ...

Page 5

... Shutdown mode. To enable the Shutdown state, both the driver and receiver must be disabled simultaneously. A logic LOW on DE (pin 5) and a logic HIGH on RE (pin 4) will put the SP481 or SP483 into Shutdown mode. In Shutdown, supply current will drop to typically 1µA. © Copyright 2002 Sipex Corporation 5 ...

Page 6

... Table 2. Receive Function Truth Table 6 Test Point 500 < 10ns < 10ns F 1.5V 1/2V 1/ OUTPUTS +0. -0. Inputs Open © Copyright 2002 Sipex Corporation ...

Page 7

... Output normally LOW Output normally HIGH 2. INPUT 1.5V OUTPUT = 1MHz 100kHz; t SP483 R = 1MHz 100kHz; t SP483 R 1. 1.5V Output normally LOW Output normally HIGH 1. < 10ns F 1. 0.5V 0. 1.5V t PLH < 10ns; t < 10ns F < 10ns; t < 10ns F 1. 0.5V 0. © Copyright 2002 Sipex Corporation ...

Page 8

... A1 0.004/0.010 (0.102/0.249 B 0.014/0.019 (0.35/0.49) 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°) 8 Ø L © Copyright 2002 Sipex Corporation ...

Page 9

... B1 0.045/0.070 (1.143/1.778) 0.008/0.014 C (0.203/0.356) 0.355/0.400 D (9.017/10.160) E 0.300/0.325 (7.620/8.255) 0.240/0.280 E1 (6.096/7.112) 0.115/0.150 L (2.921/3.810) Ø 0°/ 15° (0°/15° Ø 0.300 BSC A (7.620 BSC) © Copyright 2002 Sipex Corporation ...

Page 10

... SP483EN ..................................................................................... -40˚C to +85˚C ........................................................................ 8-pin Narrow SOIC SP483ES ..................................................................................... -40˚C to +85˚C .......................................................................... 8-pin Plastic DIP SP485CN ...................................................................................... 0˚C to +70˚C .......................................................................... 8-pin Narrow SOIC SP485CS ...................................................................................... 0˚C to +70˚C ............................................................................ 8-pin Plastic DIP SP485EN ..................................................................................... -40˚C to +85˚C ........................................................................ 8-pin Narrow SOIC SP485ES ..................................................................................... -40˚C to +85˚C .......................................................................... 8-pin Plastic DIP Please consult the factory for pricing and availability on a Tape-On-Reel option ...

Page 11

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