ISL83491 INTERSIL [Intersil Corporation], ISL83491 Datasheet

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ISL83491

Manufacturer Part Number
ISL83491
Description
3.3V, Low Power, High Speed or Slew Rate Limited, RS-485/RS-422 Transceivers
Manufacturer
INTERSIL [Intersil Corporation]
Datasheet

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3.3V, Low Power, High Speed or Slew
Rate Limited, RS-485/RS-422 Transceivers
These Intersil RS-485/RS-422 devices are BiCMOS 3.3V
powered, single transceivers that meet both the RS-485 and
RS-422 standards for balanced communication. Unlike
competitive devices, this Intersil family is specified for 10%
tolerance supplies (3V to 3.6V).
The ISL83483 and ISL83488 utilize slew rate limited drivers
which reduce EMI, and minimize reflections from improperly
terminated transmission lines, or unterminated stubs in
multidrop and multipoint applications.
Data rates up to 10Mbps are achievable by using the
ISL83485, ISL83490, or ISL83491, which feature higher
slew rates.
Logic inputs (e.g., DI and DE) accept signals in excess of
5.5V, making them compatible with 5V logic families.
Receiver (Rx) inputs feature a “fail-safe if open” design,
which ensures a logic high output if Rx inputs are floating. All
devices present a “single unit load” to the RS-485 bus, which
allows up to 32 transceivers on the network.
Driver (Tx) outputs are short circuit protected, even for
voltages exceeding the power supply voltage. Additionally,
on-chip thermal shutdown circuitry disables the Tx outputs to
prevent damage if power dissipation becomes excessive.
The ISL83488, ISL83490, ISL83491 are configured for full
duplex (separate Rx input and Tx output pins) applications.
The ISL83488 and ISL83490 are offered in space saving 8
lead packages for applications not requiring Rx and Tx
output disable functions (e.g., point-to-point and RS-422).
Half duplex configurations (ISL83483, ISL83485) multiplex
the Rx inputs and Tx outputs to provide transceivers with Rx
and Tx disable functions in 8 lead packages.
NUMBER
ISL83483
ISL83485
ISL83488
ISL83490
ISL83491
PART
HALF/FULL
DUPLEX
Half
Half
Full
Full
Full
®
1
DATA RATE
(Mbps)
0.25
0.25
10
10
10
Data Sheet
TABLE 1. SUMMARY OF FEATURES
SLEW-RATE
LIMITED?
Yes
Yes
No
No
No
1-888-INTERSIL or 321-724-7143
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
RECEIVER/DRIVER
ENABLE?
Features
• Operate from a Single +3.3V Supply (10% Tolerance)
• Interoperable with 5V Logic
• High Data Rates. . . . . . . . . . . . . . . . . . . . . up to 10Mbps
• Single Unit Load Allows up to 32 Devices on the Bus
• Slew Rate Limited Versions for Error Free Data
• Low Current Shutdown Mode (ISL83483, ISL83485,
• -7V to +12V Common Mode Input Voltage Range
• Three State Rx and Tx Outputs (Except ISL83488,
• 10ns Propagation Delay, 1ns Skew (ISL83485, ISL83490,
• Full Duplex and Half Duplex Pinouts
• Current Limiting and Thermal Shutdown for driver
Applications
• Factory Automation
• Security Networks
• Building Environmental Control Systems
• Industrial/Process Control Networks
• Level Translators (e.g., RS-232 to RS-422)
• RS-232 “Extension Cords”
Yes
Yes
Yes
ISL83483, ISL83485, ISL83488,
No
No
Transmission (ISL83483, ISL83488) . . . . . .up to 250kbps
ISL83491). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15nA
ISL83490)
ISL83491)
Overload Protection
December 2003
All other trademarks mentioned are the property of their respective owners.
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
QUIESCENT I
Copyright © Intersil Americas Inc. 2003. All Rights Reserved
(mA)
0.65
0.65
0.65
0.65
0.65
ISL83490, ISL83491
CC
SHUTDOWN?
LOW POWER
Yes
Yes
Yes
No
No
FN6052.2
PIN COUNT
14
8
8
8
8

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ISL83491 Summary of contents

Page 1

... Single Unit Load Allows Devices on the Bus • Slew Rate Limited Versions for Error Free Data Transmission (ISL83483, ISL83488 .up to 250kbps • Low Current Shutdown Mode (ISL83483, ISL83485, ISL83491 .15nA • -7V to +12V Common Mode Input Voltage Range • Three State Rx and Tx Outputs (Except ISL83488, ISL83490) • ...

Page 2

... GND Truth Tables PKG. DWG. # INPUTS M8.15 RE E8.3 X M8. E8.3 1 M8.15 NOTE: *Shutdown Mode for ISL83483, ISL83485, ISL83491 E8.3 M8.15 E8.3 M14.15 RE E14.3 Half Duplex NOTE: *Shutdown Mode for ISL83483, ISL83485, ISL83491 ISL83491 (PDIP, SOIC) TOP VIEW ...

Page 3

... ISL83483, ISL83485, ISL83488, ISL83490, ISL83491 Pin Descriptions PIN RO Receiver output > least 0.2V high < 0.2V or more low High if A and B are unconnected (floating). RE Receiver output enable enabled when RE is low high impedance when RE is high. ...

Page 4

... ISL83483, ISL83485, ISL83488, ISL83490, ISL83491 Typical Operating Circuits +3. B/Z A GND 5 +3. GND 4 +3.3V 13 GND ISL83483, ISL83485 + 0.1µF ...

Page 5

... ISL83483, ISL83485, ISL83488, ISL83490, ISL83491 Absolute Maximum Ratings V to Ground Input Voltages DI, DE -0.5V to +7V Input/Output Voltages -8V to +12. -0. Short Circuit Duration Continuous Operating Conditions Temperature Range ISL834XXIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied ...

Page 6

... I SHDN (Except ISL83488 and ISL83490) Driver Short-Circuit Current, I OSD1 V = High or Low O Receiver Short-Circuit Current I OSR DRIVER SWITCHING CHARACTERISTICS (ISL83485, ISL83490, ISL83491) Maximum Data Rate f MAX Driver Differential Output Delay t DD Driver Differential Rise or Fall Time t R Driver Input to Output Delay t PLH ...

Page 7

... SHDN. 7. The ISL83483, ISL83485, ISL83491 are put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 80ns, the parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 300ns, the parts are guaranteed to have entered shutdown. ...

Page 8

... ISL83483, ISL83485, ISL83488, ISL83490, ISL83491 Test Circuits and Waveforms FIGURE 1A. V AND SIGNAL GENERATOR FIGURE 2A. DIFFERENTIAL TEST CIRCUIT OUT SIGNAL GENERATOR FIGURE 2C. SINGLE ENDED TEST CIRCUIT FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES ...

Page 9

... ISL83483, ISL83485, ISL83488, ISL83490, ISL83491 Test Circuits and Waveforms SIGNAL Y GENERATOR PARAMETER OUTPUT Y/Z 0 (Note Y/Z 0 (Note Y/Z 1 (Note 8) ZH(SHDN) t Y/Z 1 (Note 8) ZL(SHDN) FIGURE 3A. TEST CIRCUIT FIGURE 3. DRIVER ENABLE AND DISABLE TIMES (EXCLUDING ISL83488, ISL83490) ...

Page 10

... EMI, and to minimize reflections in unterminated or improperly terminated networks. Data rate on these slew 10 rate limited versions is a maximum of 250kbps. Outputs of ISL83485, ISL83490, ISL83491 drivers are not limited, so faster output transition times allow data rates of at least 10Mbps. Data Rate, Cables, and Terminations RS-485, RS-422 are intended for network lengths up to 4000’ ...

Page 11

... FIGURE 7. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs 800 750 700 650 600 100Ω DIFF 2 - TEMPERATURE ( C) TEMPERATURE ISL83483/85 ISL83483/85 GND; ISL83491 GND; ISL83488/90 - TEMPERATURE ( C) FIGURE 9. SUPPLY CURRENT vs TEMPERATURE R = 54Ω DIFF ...

Page 12

... 2.5 B/Z 2 1.5 1 A/Y 0.5 0 TIME (400ns/DIV) FIGURE 14. DRIVER AND RECEIVER WAVEFORMS, LOW TO HIGH (ISL83483, ISL83488 3.3V ISL83483 thru ISL83491; Unless Otherwise Specified (Continued 300 250 t PLHY 200 150 t PHLY 100 t PHLZ FIGURE 11. DRIVER SKEW vs TEMPERATURE 4 3 ...

Page 13

... A/Y 0.5 0 TIME (10ns/DIV) FIGURE 16. DRIVER AND RECEIVER WAVEFORMS, LOW TO HIGH (ISL83485, ISL83490, ISL83491) Die Characteristics SUBSTRATE POTENTIAL (POWERED UP): GND TRANSISTOR COUNT: 528 PROCESS: Si Gate CMOS 3.3V ISL83483 thru ISL83491; Unless Otherwise Specified (Continued 54Ω 15pF 2.5 A/Y 2 1.5 1 B/Z 0.5 0 FIGURE 17 ...

Page 14

... ISL83483, ISL83485, ISL83488, ISL83490, ISL83491 Dual-In-Line Plastic Packages (PDIP INDEX N/2 AREA -B- -A- D BASE PLANE -C- SEATING PLANE 0.010 (0.25 NOTES: 1. Controlling Dimensions: INCH. In case of conflict between English and Metric dimensions, the inch dimensions control. 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. ...

Page 15

... ISL83483, ISL83485, ISL83488, ISL83490, ISL83491 Dual-In-Line Plastic Packages (PDIP INDEX N/2 AREA -B- -A- D BASE PLANE -C- SEATING PLANE 0.010 (0.25 NOTES: 1. Controlling Dimensions: INCH. In case of conflict between English and Metric dimensions, the inch dimensions control. 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. ...

Page 16

... ISL83483, ISL83485, ISL83488, ISL83490, ISL83491 Small Outline Plastic Packages (SOIC) N INDEX 0.25(0.010) H AREA E - SEATING PLANE - -C- α µ 0.10(0.004) 0.25(0.010 NOTES: 1. Symbols are defined in the “MO Series Symbol List” in Section 2.2 of Publication Number 95. ...

Page 17

... ISL83483, ISL83485, ISL83488, ISL83490, ISL83491 Small Outline Plastic Packages (SOIC) N INDEX 0.25(0.010) H AREA E - SEATING PLANE - -C- α µ 0.10(0.004) 0.25(0.010 NOTES: 1. Symbols are defined in the “MO Series Symbol List” in Section 2.2 of Publication Number 95. ...

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