ISL8483 Intersil Corporation, ISL8483 Datasheet

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ISL8483

Manufacturer Part Number
ISL8483
Description
5V/ Low Power/ High Speed or Slew Rate Limited/ RS-485/RS-422 Transceivers
Manufacturer
Intersil Corporation
Datasheet
®
Data Sheet
5V, Low Power, High Speed or Slew Rate
Limited, RS-485/RS-422 Transceivers
The Intersil RS-485/RS-422 devices are BiCMOS 5V
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 (4.5V to 5.5V).
The ISL8483, ISL8488, and ISL8489 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 5Mbps are achievable by using the
ISL8485, ISL8490, or ISL8491, which feature higher slew
rates.
All devices present a “single unit load” to the RS-485 bus,
which allows up to 32 transceivers on the network.
Receiver (Rx) inputs feature a “fail-safe if open” design,
which ensures a logic high Rx output if Rx inputs are
floating.
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 ISL8488 - 91 are configured for full duplex (separate Rx
input and Tx output pins) applications. The ISL8488 and
ISL8490 are offered in space saving 8 lead packages for
applications not requiring Rx and Tx output disable functions
(e.g., point-to-point). Half duplex configurations (ISL8483,
ISL8485) multiplex the Rx inputs and Tx outputs to allow
transceivers with Rx and Tx disable functions in 8 lead
packages.
PART
HALF/FULL
NO. OF DEVICES
NUMBER
DUPLEX
ALLOWED ON BUS
ISL8483
Half
32
ISL8485
Half
32
ISL8488
Full
32
ISL8489
Full
32
ISL8490
Full
32
ISL8491
Full
32
1
ISL8483, ISL8485, ISL8488,
ISL8489, ISL8490, ISL8491
December 2003
Features
• Specified for 10% Tolerance Supplies
• Class 3 ESD Protection (HBM) on all Pins. . . . . . . . >7kV
• High Data Rates. . . . . . . . . . . . . . . . . . . . . . up to 5Mbps
• Slew Rate Limited Versions for Error Free Data
Transmission at 250kbps (ISL8483, ISL8488, ISL8489)
• Single Unit Load Allows up to 32 Devices on the Bus
• 1nA Low Current Shutdown Mode (ISL8483)
• Low Quiescent Current:
µ
- 160
A (ISL8483, ISL8488, ISL8489)
µ
- 340
A (ISL8485, ISL8490, ISL8491)
• -7V to +12V Common Mode Input Voltage Range
• Three State Rx and Tx Outputs (Except ISL8488,
ISL8490)
• 30ns Propagation Delays, 5ns Skew (ISL8485, ISL8490,
ISL8491)
• Full Duplex and Half Duplex Pinouts
• Operate from a Single +5V Supply (10% Tolerance)
• Current Limiting and Thermal Shutdown for driver
Overload Protection
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”
TABLE 1. SUMMARY OF FEATURES
DATA RATE
SLEW-RATE
RECEIVER/
(Mbps)
LIMITED?
DRIVER ENABLE?
0.25
Yes
Yes
5
No
Yes
0.25
Yes
No
0.25
Yes
Yes
5
No
No
5
No
Yes
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
|
1-888-INTERSIL or 321-724-7143
Intersil (and design) is a registered trademark of Intersil Americas Inc.
All other trademarks mentioned are the property of their respective owners.
FN6046.3
QUIESCENT
LOW POWER
PIN
I
(µA)
SHUTDOWN?
COUNT
CC
160
Yes
8
340
No
8
160
No
8
160
No
14
340
No
8
340
No
14
Copyright © Intersil Americas Inc. 2003. All Rights Reserved.

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ISL8483 Summary of contents

Page 1

... RS-422 standards for balanced communication. Unlike competitive devices, this Intersil family is specified for 10% tolerance supplies (4.5V to 5.5V). The ISL8483, ISL8488, and ISL8489 utilize slew rate limited drivers which reduce EMI, and minimize reflections from improperly terminated transmission lines, or unterminated stubs in multidrop and multipoint applications. ...

Page 2

... ISL8483, ISL8485, ISL8488, ISL8489, ISL8490, ISL8491 Ordering Information PART NO. TEMP. o (BRAND) RANGE ( C) PACKAGE ISL8483IB - SOIC (8483IB) ISL8483IB-T - SOIC (8483IB) Tape and Reel ISL8483IP - PDIP ISL8485CB SOIC (8485CB) ISL8485CB SOIC (8485CB) Tape and Reel ...

Page 3

... V System power supply input (4.5V to 5.5V Connection. 3 OUTPUTS High-Z High-Z 0 High-Z * High *Shutdown Mode for ISL8483 (see Note 7) FUNCTION RECEIVING INPUTS OUTPUT DE DE A-B Half Duplex Full Duplex ≥ +0. ≤ -0. Inputs Open ...

Page 4

... ISL8483, ISL8485, ISL8488, ISL8489, ISL8490, ISL8491 Typical Operating Circuits +5V + 0.1µ B/Z A GND 5 +5V + 0.1µ GND 4 +5V + 0.1µ ...

Page 5

... ISL8483, ISL8485, ISL8488, ISL8489, ISL8490, ISL8491 Absolute Maximum Ratings V to Ground Input Voltages DI, DE -0. Input/Output Voltages -8V to +12. -0. Short Circuit Duration Continuous ESD Rating HBM (Per MIL-STD-883, Method 3015. >7kV Operating Conditions Temperature Range ISL84XXCX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 ISL84XXIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 CAUTION: Stresses above those listed in “ ...

Page 6

... IN CM ISL8488, ISL8489, DE, DI ISL8490, ISL8491, DE, DI ISL8485, DI ISL8483, DI ISL8483 0V -7V ≤ V ≤ 12V, Note ≤ V ≤ 54Ω ...

Page 7

... When testing the ISL8483, the RE signal high time must be short enough (typically <200ns) to prevent the device from entering SHDN. 7. The ISL8483 is put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 50ns, the parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 600ns, the parts are guaranteed to have entered shutdown. See “ ...

Page 8

... ISL8483, ISL8485, ISL8488, ISL8489, ISL8490, ISL8491 Test Circuits and Waveforms SIGNAL GENERATOR FIGURE 2A. TEST CIRCUIT FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES SIGNAL Y GENERATOR C L (SHDN) for ISL8483 only PARAMETER OUTPUT ...

Page 9

... EMI. Drivers of the ISL8483/85/89/91 are three-statable via the active high DE input. The ISL8483/88/89 driver outputs are slew rate limited to minimize EMI, and to minimize reflections in unterminated or improperly terminated networks. Data rate on these slew rate limited versions is a maximum of 250kbps. Outputs of ISL8485/90/91 drivers are not limited, so faster output transition times allow data rates of at least 5Mbps ...

Page 10

... Disabling both the driver and the receiver for less than 50ns guarantees that the ISL8483 will not enter shutdown. Note that receiver and driver enable times increase when the ISL8483 enables from shutdown. Refer to Notes 5-8, at the end of the Electrical Specification table, for more information. o ...

Page 11

... PLHZ 1 FIGURE 13. DRIVER SKEW vs TEMPERATURE ISL8485 ISL8483 ISL8485 GND ISL8490/91 ISL8483 GND GND; ISL8488/89 -40 - TEMPERATURE ( C) FIGURE 9. SUPPLY CURRENT vs TEMPERATURE | PHLY PLHZ |t PLHY |CROSS PT. OF Y↑ & Z↓ - CROSS PT. OF Y↓ & Z↑| ...

Page 12

... TIME (10ns/DIV) FIGURE 16. DRIVER AND RECEIVER WAVEFORMS, LOW TO HIGH (ISL8485, ISL8490, ISL8491) Die Characteristics SUBSTRATE POTENTIAL (POWERED UP): GND TRANSISTOR COUNT: 518 PROCESS: Si Gate CMOS 5V ISL8483 thru ISL8491; Unless Otherwise Specified (Continued 54Ω 100pF FIGURE 15. DRIVER AND RECEIVER WAVEFORMS, = 54Ω ...

Page 13

... ISL8483, ISL8485, ISL8488, ISL8489, ISL8490, ISL8491 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 14

... ISL8483, ISL8485, ISL8488, ISL8489, ISL8490, ISL8491 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

... ISL8483, ISL8485, ISL8488, ISL8489, ISL8490, ISL8491 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 16

... ISL8483, ISL8485, ISL8488, ISL8489, ISL8490, ISL8491 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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