sp306ct Exar Corporation, sp306ct Datasheet

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sp306ct

Manufacturer Part Number
sp306ct
Description
Rs-422/rs-423 Line Drivers/receivers
Manufacturer
Exar Corporation
Datasheet
DESCRIPTION…
The SP306 is a single chip device that offers both RS-422 and RS-423–type serial interfaces. The
device can be programmed to provide two full–duplex channels of either RS-422 or RS-423 via
two mode control pins. The SP306 also features a loopback function that can be activated in any
operating mode. The SP306 is available in a 28–pin SOIC package for operation over the
commercial temperature range.
SIGNAL PROCESSING EXCELLENCE
SIGNAL PROCESSING EXCELLENCE
Single chip serial transceiver supports
RS-422 or RS-423 interfaces
Programmable Selection of Interface
Two Full–Duplex Channels of Either
Interface
Software–Selectable Mode
Loopback for Self–Testing
Short–Circuit Protected
Surface Mount Packaging
Corporation
Corporation
RS-422/RS-423 Line Drivers/Receivers
R
R
OUT
OUT
T
T
IN
IN
A
B
A
B
14
22
23
20
26
17
7
8
+5V +12V –12V
28
V
GND
SELECT A
SELECT B
LOOPBACK
SP306
CC
SUPPLY
1
V
DD
T
T
1
2
R
R
2
15
1
V
EE
10
13
12
6
5
9
2
3
R
R
T
T
T
T
R
R
IN
IN
OUT
OUT
OUT
OUT
IN
IN
B2
B1
A2
A1
A1
A2
B1
B2
SP306
89

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sp306ct Summary of contents

Page 1

Corporation SIGNAL PROCESSING EXCELLENCE RS-422/RS-423 Line Drivers/Receivers Single chip serial transceiver supports RS-422 or RS-423 interfaces Programmable Selection of Interface Two Full–Duplex Channels of Either Interface Software–Selectable Mode Loopback for Self–Testing Short–Circuit Protected Surface Mount Packaging DESCRIPTION… The SP306 is ...

Page 2

SPECIFICATIONS ( and nominal supply voltages unless otherwise noted) MIN A MAX PARAMETER MIN. RS-423 DRIVER TTL Input Level 2.0 IH High Level Output +3.0 Low Level Output –3.0 Short Circuit Current Transition Time ...

Page 3

Note: 1. The common mode voltage is defined as the algebraic mean of the two voltages appearing at the receiver input terminals with respect to the receiver circuit ground. 2. Only one output drive pin per package will be shorted ...

Page 4

The RS423 line drivers convert TTL logic levels into inverted RS-423 output signals. All line drivers are inter- nally protected against short circuits on their outputs. The RS-422 receivers convert the RS-422 dif- ferential input signals ...

Page 5

SELECT SELECT LOOPBACK = OUT OUT T B2 OUT 14 RS-423 DRIVER * Tri–state output Figure 2. ...

Page 6

... RS-423 DRIVER * Tri–state output Figure 4. Control Input Configuration — SELECT SELECT ORDERING INFORMATION Model Two full–duplex channels RS-422/RS-423 SP306CT ................................................ +70 C ............................................................... 28–pin SOIC SP306MF .......................................... – +125 C ........................................... 28–pin Ceramic Flatpack 94 SUPPLY SUPPLY +5V +12V –12V +5V +12V – ...

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