ISL81485 Intersil Corporation, ISL81485 Datasheet
ISL81485
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ISL81485 Summary of contents
Page 1
... Data Sheet 5V, 30Mbps, RS-485/RS-422 Transceiver The Intersil ISL81485 is a BiCMOS, 5V powered, single transceiver that meets both the RS-485 and RS-422 standards for balanced communication, and features a larger output voltage and higher data rate to benefit high speed applications. Unlike competitive devices, this Intersil transceiver is specified for 10% tolerance supplies (4 ...
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... GND 5 2 ISL81485 Truth Table OUTPUTS High-Z High FUNCTION ISL81485 + 0.1µ RECEIVING INPUTS OUTPUT DE A-B RO ≥ +0. ≤ -0. Inputs Open High-Z +5v + 0.1µ ...
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... Operating Conditions Temperature Range ISL81485IX -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. ...
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... Devices meeting these limits are denoted as “1 unit load (UL)” transceivers. The RS-485 standard allows Unit Loads on the bus 1UL transceiver permits > 32 devices on the bus. Test Circuits and Waveforms FIGURE 1A. V AND ISL81485 = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are TEST CONDITIONS 0V ≤ V ≤ 54Ω 100pF (Figure 2) PHL DIFF 54Ω ...
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... FIGURE 3A. TEST CIRCUIT SIGNAL GENERATOR FIGURE 4A. TEST CIRCUIT 5 ISL81485 (Continued 100pF L OUT (Y) DIFF C = 100pF L OUT (Z) DIFF OUT ( SKEW = |CROSSING PT. OF Y↑ & Z↓ - CROSSING PT. OF Y↓ & Z↑| 110Ω GND ...
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... RS-422 and RS-485 are intended for runs as long as 4000’, so the wide CMR is necessary to handle ground potential differences, as well as voltages induced in the cable by external fields. 6 ISL81485 (Continued) 15pF A RO FIGURE 5. RECEIVER PROPAGATION DELAY RE 1kΩ ...
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... Figure 7 illustrates the 30Mbps performance of the ISL81485 driving 350’ of CAT5 cable, terminated in 120Ω at both the driver and receiver ends. As shown, the differential signal (A-B) delivered to the receiver inputs at the end of the cable is still greater than 1 ...
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... TEMPERATURE ( FIGURE 11. DRIVER PROPAGATION DELAY vs TEMPERATURE R DIFF A B TIME (10ns/DIV) FIGURE 13. DRIVER AND RECEIVER WAVEFORMS, LOW TO HIGH 8 ISL81485 5V Unless Otherwise Specified (Continued 3.8 3.6 3.4 3.2 2 FIGURE 10. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs 2.5 t PLHZ t PLHY 1.5 0.5 50 ...
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... Typical Performance Curves Die Characteristics SUBSTRATE POTENTIAL (POWERED UP): GND TRANSISTOR COUNT: 528 PROCESS: Si Gate BiCMOS 9 ISL81485 5V Unless Otherwise Specified (Continued 950 900 850 800 DE = GND 750 700 - TEMPERATURE ( C) FIGURE 15. SUPPLY CURRENT vs TEMPERATURE ...
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... B - 10. Datums -A - and to be determined at Datum plane . - H - 11. Controlling dimension: MILLIMETER. Converted inch dimen- sions are for reference only. 10 ISL81485 M8.118 (JEDEC MO-187AA) 8 LEAD MINI SMALL OUTLINE PLASTIC PACKAGE SYMBOL θ ...
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... 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 11 ISL81485 M8.15 (JEDEC MS-012-AA ISSUE C) 8 LEAD NARROW BODY SMALL OUTLINE PLASTIC ...