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SP1491ECN Datasheet(PDF) 3 Page - Sipex Corporation |
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SP1491ECN Datasheet(HTML) 3 Page - Sipex Corporation |
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3 / 10 page  3 Date: 5/18/04 SP1490E/1491E Full Duplex RS-485 Transceivers © Copyright 2004 Sipex Corporation SP1490E/1491E RECEIVER DC Characteristics Differential Input Threshold 0.2 +0.2 Volts -7V ≤ V CM ≤ 12V Input Hysteresis 70 mV V CM = 0V Output Voltage High 3.5 Volts I O = -4mA, VID = +200mV Output Voltage Low 0.4 Volts I O = +4mA, VID = -200mV Input Resistance 12 15 kΩ -7V ≤ V CM ≤ 12V (1 unit load) Input Current (A, B); V IN = 12V ±1.0 mA V IN = 12V Input Current (A, B); V IN = -7V -0.8 mA V IN = -7V Short-Circuit Current 85 mA 0V ≤ V O ≤ VCC PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP1490E/1491E RECEIVER AC Characteristics Maximum Data Rate 20 Mbps Receiver Input to Output 20 45 50 ns t PLH; RDIFF = 54Ω, CL1 15pF RO A B A B DI DE 3V CL2 RDIFF 500 CL Output Under Test S1 S2 VCC Figure 3. Driver/Receiver Timing Test Circuit Figure 4. Driver Timing Test Load #2 Circuit A B R R VOD VOC 1K 1K CRL Receiver Output S1 S2 Test Point VCC Figure 1. Driver DC Test Load Circuit Figure 2. Receiver Timing Test Load Circuit C L1 = CL2 = 100pF; Figures 3 & 8 Receiver Input to Output 20 45 50 ns t PHL; RDIFF = 54Ω, C L1 = CL2 = 100pF; Figures 3 & 8 Diff. Receiver Skew It PLH-tPHLI5 10 ns R DIFF = 54Ω; CL1 = CL2 = 100pF; Receiver Tplh/Tphl 40 70 ns POWER REQUIREMENTS Supply Voltage +4.75 +5.25 Volts Supply Current 900 µA ENVIRONMENTAL AND MECHANICAL Operating Temperature Commercial (_C_) 0 +70 °C Industrial (_E_) -40 +85 °C Storage Temperature -65 +150 °C Package Plastic DIP (_S_) NSOIC (_N) SPECIFICATIONS (continued) T MIN to TMAX and VCC = 5V ± 5% unless otherwise noted. |
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