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S35390A Datasheet(PDF) 8 Page - Seiko Instruments Inc |
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S35390A Datasheet(HTML) 8 Page - Seiko Instruments Inc |
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8 / 51 page  FOR AUTOMOTIVE 105°C OPERATION 2-WIRE REAL-TIME CLOCK S-35390A H Series Rev.2.2_00 Seiko Instruments Inc. 8 AC Electrical Characteristics Table 8 Measurement Conditions SDA C = 100 pF VDD R = 1 k Ω Input pulse voltage VIH = 0.9 × VDD, VIL = 0.1 × VDD Input pulse rise / fall time 20 ns Output determination voltage VOH = 0.5 × VDD, VOL = 0.5 × VDD Output load 100 pF + pull-up resistor 1 kΩ Remark The power supplies of the IC and load have the same electrical potential. Figure 7 Output Load Circuit Table 9 AC Electrical Characteristics (Ta = −40°C to +105°C) Item Symbol VDD *2 ≥ 1.3 V VDD *2 ≥ 3.0 V Unit Min. Typ. Max. Min. Typ. Max. SCL clock frequency fSCL 0 − 100 0 − 400 kHz SCL clock low time tLOW 4.7 − − 1.3 − − μs SCL clock high time tHIGH 4 − − 0.6 − − μs SDA output delay time *1 tPD − − 3.5 − − 0.9 μs Start condition setup time tSU.STA 4.7 − − 0.6 − − μs Start condition hold time tHD.STA 4 − − 0.6 − − μs Data input setup time tSU.DAT 250 − − 100 − − ns Data input hold time tHD.DAT 0 − − 0 − − μs Stop condition setup time tSU.STO 4.7 − − 0.6 − − μs SCL, SDA rise time tR − − 1 − − 0.3 μs SCL, SDA fall time tF − − 0.3 − − 0.3 μs Bus release time tBUF 4.7 − − 1.3 − − μs Noise suppression time tI − − 100 − − 50 ns *1. Since the output format of the SDA pin is Nch open-drain output, SDA output delay time is determined by the values of the load resistance (RL) and load capacity (CL) outside the IC. Therefore, use this value only as a reference value. *2. Regarding the power supply voltage, refer to " Recommended Operation Conditions". SCL SDA (S-35390A H Series input) SDA (S-35390A H Series output) tBUF tR tSU.STO tSU.DAT tHD.DAT tPD tHIGH tLOW tHD.STA tSU.STA tF Figure 8 Bus Timing |
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