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ISL8485EIB Datasheet(PDF) 6 Page - Intersil Corporation |
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ISL8485EIB Datasheet(HTML) 6 Page - Intersil Corporation |
6 / 14 page 6 Driver Enable from Shutdown to Output Low tZL(SHDN) CL = 100pF, SW = VCC, (Figure 3), (Notes 7, 8) Full - - 2000 ns Receiver Enable from Shutdown to Output High tZH(SHDN) CL = 15pF, SW = GND, (Figure 5), (Notes 7, 9) Full - - 2500 ns Receiver Enable from Shutdown to Output Low tZL(SHDN) CL = 15pF, SW = VCC, (Figure 5), (Notes 7, 9) Full - - 2500 ns ESD PERFORMANCE RS-485 Pins (A/Y, B/Z) Human Body Model 25 - ±15 - kV All Other Pins 25 - > ±7- kV NOTES: 2. All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless otherwise specified. 3. Supply current specification is valid for loaded drivers when DE = 0V. 4. Applies to peak current. See “Typical Performance Curves” for more information. 5. When testing the ISL8483E, keep RE = 0 to prevent the device from entering SHDN. 6. When testing the ISL8483E, the RE signal high time must be short enough (typically <200ns) to prevent the device from entering SHDN. 7. The ISL8483E 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 “Low-Power Shutdown Mode” section. 8. Keep RE = VCC, and set the DE signal low time >600ns to ensure that the device enters SHDN. 9. 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 up to 32 Unit Loads on the bus. 11. Guaranteed by characterization, but not tested. Test Circuits and Waveforms FIGURE 1. DRIVER VOD AND VOC Electrical Specifications Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at VCC = 5V, TA = 25°C, (Note 2) (Continued) PARAMETER SYMBOL TEST CONDITIONS TEMP (°C) MIN TYP MAX UNITS D DE DI VCC VOD VOC R R Z Y ISL8483E, ISL8485E |
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