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ISL4485E Scheda tecnica(PDF) 4 Page - Intersil Corporation |
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ISL4485E Scheda tecnica(HTML) 4 Page - Intersil Corporation |
4 / 11 page 4 SWITCHING CHARACTERISTICS Driver Input to Output Delay tPLH, tPHL RDIFF = 54Ω, CL = 100pF, (Figure 2) Full 15 30 50 ns Driver Output Skew tSKEW RDIFF = 54Ω, CL = 100pF, (Figure 2) Full - 1.3 5 ns Driver Differential Rise or Fall Time tR, tF RDIFF = 54Ω, CL = 100pF, (Figure 2) Full 3 11 25 ns Driver Enable to Output High tZH CL = 100pF, SW = GND, (Figure 3) Full - 17 30 ns Driver Enable to Output Low tZL CL = 100pF, SW = VCC, (Figure 3) Full - 14 30 ns Driver Disable from Output High tHZ CL = 15pF, SW = GND, (Figure 3) Full - 19 30 ns Driver Disable from Output Low tLZ CL = 15pF, SW = VCC, (Figure 3) Full - 13 30 ns Driver Maximum Data Rate fMAXD VOD ≥ 1.5V , (Figure 4, Note 6) Full 20 - - Mbps Receiver Input to Output Delay tPLH, tPHL Figure 5 Full 20 40 70 ns Receiver Skew | tPLH - tPHL |tSKD Figure 5 Full - 3 10 ns Receiver Enable to Output High tZH CL = 15pF, SW = GND, (Figure 6) Full - 9 25 ns Receiver Enable to Output Low tZL CL = 15pF, SW = VCC, (Figure 6) Full - 9 25 ns Receiver Disable from Output High tHZ CL = 15pF, SW = GND, (Figure 6) Full - 9 25 ns Receiver Disable from Output Low tLZ CL = 15pF, SW = VCC, (Figure 6) Full - 9 25 ns Receiver Maximum Data Rate fMAXR CL = 15pF, VID ≥ 1.5V (Note 6) Full 20 - - Mbps ESD PERFORMANCE RS-485 Pins (A/Y, B/Z) Human Body Model 25 - ±15 - kV All Other Pins 25 - > ±7- kV NOTE: 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. 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. 6. 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 oC, Note 2 (Continued) PARAMETER SYMBOL TEST CONDITIONS TEMP (oC) MIN TYP MAX UNITS D DE DI VCC VOD VOC R R Z Y ISL4485E |
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