isl8485e Intersil Corporation, isl8485e Datasheet

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isl8485e

Manufacturer Part Number
isl8485e
Description
5v, Half Duplex, 5mbps, ?15kv Esd Protected, Rs-485/rs-422 Transceiver
Manufacturer
Intersil Corporation
Datasheet

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0
ESD Protected to ±15kV, 5V, Low Power,
High Speed or Slew Rate Limited,
RS-485/RS-422 Transceivers
These Intersil RS-485/RS-422 devices are ESD protected,
BiCMOS 5V powered, single transceivers that meet both the
RS-485 and RS-422 standards for balanced communication.
Each driver output/receiver input is protected against ±15kV
ESD strikes, without latch-up. Unlike competitive devices,
this Intersil family is specified for 10% tolerance supplies
(4.5V to 5.5V).
The ISL8483E utilizes 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
ISL8485E which features higher slew rates.
Both 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.
These half duplex configurations multiplex the Rx inputs and
Tx outputs to allow transceivers with Rx and Tx disable
functions in 8 lead packages.
NUMBER
ISL8483E
ISL8485E
PART
HALF/FULL
DUPLEX
Half
Half
ALLOWED ON BUS
NO. OF DEVICES
®
1
32
32
Data Sheet
DATA RATE
TABLE 1. SUMMARY OF FEATURES
(Mbps)
0.25
5
1-888-INTERSIL or 321-724-7143
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
SLEW-RATE
LIMITED?
Yes
No
Features
• Pb-Free Plus Anneal Available (RoHS Compliant)
• 125°C Temperature Option
• RS-485 I/O Pin ESD Protection
• Specified for 10% Tolerance Supplies
• High Data Rate Version (ISL8485E) . . . . . . up to 5Mbps
• Slew Rate Limited Version for Error Free Data
• Single Unit Load Allows up to 32 Devices on the Bus
• 1nA Low Current Shutdown Mode (ISL8483E)
• Low Quiescent Current:
• -7V to +12V Common Mode Input Voltage Range
• Three State Rx and Tx Outputs
• 30ns Propagation Delays, 5ns Skew (ISL8485E)
• Operate from a Single +5V Supply (10% Tolerance)
• 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”
- Class 3 ESD Level on all Other Pins . . . . . . >7kV HBM
Transmission (ISL8483E) . . . . . . . . . . . . . .up to 250kbps
- 160
- 500
Overload Protection
RECEIVER/DRIVER
August 22, 2005
ENABLE?
µ
µ
All other trademarks mentioned are the property of their respective owners.
A (ISL8483E)
A (ISL8485E)
Copyright Intersil Americas Inc. 2003, 2004, 2005. All R ights Reserved.
|
Yes
Yes
Intersil (and design) is a registered trademark of Intersil Americas Inc.
ISL8483E, ISL8485E
QUIESCENT
I
CC
160
500
(µA)
. . . . . . . . . . . . . ±
SHUTDOWN?
LOW POWER
Yes
No
FN6048.7
15kV HBM
COUNT
PIN
8
8

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isl8485e Summary of contents

Page 1

... RS-485 I/O Pin ESD Protection - Class 3 ESD Level on all Other Pins . . . . . . >7kV HBM • Specified for 10% Tolerance Supplies • High Data Rate Version (ISL8485E 5Mbps • Slew Rate Limited Version for Error Free Data Transmission (ISL8483E .up to 250kbps • Single Unit Load Allows Devices on the Bus • ...

Page 2

... Pinout ISL8483E, ISL8485E (PDIP, SOIC) TOP VIEW Truth Tables TRANSMITTING INPUTS *Shutdown Mode for ISL8483E (see Note 7) RECEIVING INPUTS RE DE A-B ≥ +0. ≤ -0. Inputs Open *Shutdown Mode for ISL8483E (see Note 7) ...

Page 3

... System power supply input (4.5V to 5.5V). CC Typical Operating Circuits +5V + 0.1µ GND 5 3 ISL8483E, ISL8485E FUNCTION ISL8483E, ISL8485E R T +5V + 0.1µ GND 5 ...

Page 4

... ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table Operating Conditions Temperature Range ISL8485ECX 0°C to 70°C ISL848XEIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to 85°C ISL8485EAX -40°C to 125°C 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 5

... SHDN Driver Enable from Shutdown to t ZH(SHDN) Output High 5 ISL8483E, ISL8485E = 4.5V to 5.5V; Unless Otherwise Specified. CC ° (Note 2) (Continued TEST CONDITIONS ISL8485E, DI ISL8483E, DI ISL8483E 0V -7V ≤ V ≤ ...

Page 6

... Set the RE signal high time >600ns to ensure that the device enters SHDN. 10. Devices meeting these limits are denoted as “single unit load (1 UL)” transceivers. The RS-485 standard allows Unit Loads on the bus. 11. Guaranteed by characterization, but not tested. Test Circuits and Waveforms 6 ISL8483E, ISL8485E = 4.5V to 5.5V; Unless Otherwise Specified. CC ° = 5V, T ...

Page 7

... Y/Z 0 (Note Y/Z 0 (Note Y/Z 1 (Note ZH(SHDN) t Y/Z 1 (Note ZL(SHDN) FIGURE 3A. TEST CIRCUIT 7 ISL8483E, ISL8485E (Continued 100pF L OUT (Y) DIFF C = 100pF L OUT (Z) DIFF OUT ( SKEW = |t 500Ω GND (pF) ZH ...

Page 8

... RS-422 and RS-485 are intended for runs as long as 4000’, so the wide CMR is necessary to handle 8 ISL8483E, ISL8485E (Continued) 15pF A RO FIGURE 4. RECEIVER PROPAGATION DELAY 1kΩ ...

Page 9

... 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 the ISL8485E driver are not limited, so faster output transition times allow data rates of at least 5Mbps. Data Rate, Cables, and Terminations RS-485/422 are intended for network lengths up to 4000’ ...

Page 10

... TEMPERATURE (°C) FIGURE 10. DRIVER PROPAGATION DELAY vs TEMPERATURE (ISL8483E) 10 ISL8483E, ISL8485E 25°C, ISL8483E and ISL8485E; Unless Otherwise Specified CC A 3.6 3.4 3.2 2.8 2.6 2.4 2 FIGURE 7. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs 700 650 600 550 500 ...

Page 11

... TIME (10ns / DIV) FIGURE 16. DRIVER AND RECEIVER WAVEFORMS, LOW TO HIGH (ISL8485E) 11 ISL8483E, ISL8485E 25°C, ISL8483E and ISL8485E; Unless Otherwise Specified (Continued 2 PLHZ 1 -40 FIGURE 13. DRIVER SKEW vs TEMPERATURE (ISL8485E) = 54Ω 100pF ...

Page 12

... Die Characteristics SUBSTRATE POTENTIAL (POWERED UP): GND TRANSISTOR COUNT: 518 PROCESS: Si Gate CMOS 12 ISL8483E, ISL8485E ...

Page 13

... B1 maximum dimensions do not include dambar protrusions. Dambar protrusions shall not exceed 0.010 inch (0.25mm the maximum number of terminal positions. 10. Corner leads (1, N, N/2 and N for E8.3, E16.3, E18.3, E28.3, E42.6 will have a B1 dimension of 0.030 - 0.045 inch (0.76 - 1.14mm). 13 ISL8483E, ISL8485E E8.3 8 LEAD DUAL-IN-LINE PLASTIC PACKAGE SYMBOL ...

Page 14

... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 14 ISL8483E, ISL8485E M8.15 (JEDEC MS-012-AA ISSUE C) 8 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE ...

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