isl4485e Intersil Corporation, isl4485e Datasheet
isl4485e
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isl4485e Summary of contents
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... Data Sheet ± 15kV ESD Protected, 20Mbps, 5V, Low Power, RS-485/RS-422 Transceiver The Intersil ISL4485E is a high speed, BiCMOS 5V powered, single transceiver that meets 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 ...
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... Typical Operating Circuit + B/Z A GND 5 2 ISL4485E OUTPUTS RE B/Z A High-Z High-Z 1 FUNCTION ISL4485E + 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 ISL4485EIB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -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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... Applies to peak current. See “Typical Performance Curves” for more information. 5. Devices meeting these limits are denoted as “single unit load (1 UL)” transceivers. The RS-485 standard allows Unit Loads on the bus. 6. Guaranteed by characterization, but not tested. Test Circuits and Waveforms 4 ISL4485E = 4.5V to 5.5V; Unless Otherwise Specified 5V, T ...
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... C L PARAMETER OUTPUT FIGURE 3A. TEST CIRCUIT 5 ISL4485E (Continued 100pF L OUT (Y) DIFF C = 100pF L OUT (Z) DIFF OUT ( SKEW = |CROSSING PT. OF Y↑ & Z↓ - CROSSING PT. OF Y↓ & Z↑| DE 500Ω GND SW OUT ( ...
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... GENERATOR FIGURE 5A. TEST CIRCUIT SIGNAL A GENERATOR PARAMETER FIGURE 6A. TEST CIRCUIT 6 ISL4485E (Continued 200pF OD D DIFF OUT ( FIGURE 4. DRIVER DATA RATE 15pF A RO FIGURE 5. RECEIVER PROPAGATION DELAY 1kΩ GND SW 15pF ...
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... ISL4485E's large differential voltage swing, fast transition times, and high drive-current output stages allow operation at 20Mbps in RS-485/422 networks as long as 450'. Figure 7 details ISL4485E operation at 20Mbps driving 300' of CAT 5 cable terminated in 120Ω at the driver and the receiver (i.e., double terminated). The acceptance criteria for this test was the ability of the driver to deliver a 1.5V differential signal to the receiver at the end of the cable (i.e., |A-B| ≥ ...
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... DIFFERENTIAL CAPACITANCE (pF) FIGURE 9. DATA RATE vs DIFFERENTIAL CAPACITANCE 8 ISL4485E mechanism to activate, and without degrading the RS-485 common mode range of -7V to +12V. This built-in ESD protection eliminates the need for board level protection structures (e ...
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... DIFFERENTIAL OUTPUT VOLTAGE (V) FIGURE 11. DRIVER OUTPUT CURRENT vs DIFFERENTIAL OUTPUT VOLTAGE PHLY t PHLZ 30 t PLHY 25 25 -40 - TEMPERATURE ( FIGURE 13. DRIVER PROPAGATION DELAY vs TEMPERATURE 9 ISL4485E 5V Unless Otherwise Specified (Continued 3.6 3.4 3.2 2.8 2.6 2.4 2 FIGURE 12. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs 2.5 t PLHZ 1 ...
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... TIME (10ns/DIV) FIGURE 15. DRIVER AND RECEIVER WAVEFORMS, LOW TO HIGH -100 -120 FIGURE 17. DRIVER OUTPUT CURRENT vs SHORT CIRCUIT VOLTAGE Die Characteristics SUBSTRATE POTENTIAL (POWERED UP): GND TRANSISTOR COUNT: 518 PROCESS: Si Gate CMOS 10 ISL4485E 5V Unless Otherwise Specified (Continued 54Ω 100pF ...
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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 ISL4485E M8.15 (JEDEC MS-012-AA ISSUE C) 8 LEAD NARROW BODY SMALL OUTLINE PLASTIC ...