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S-7750C71XX-HCT1 Datasheet(PDF) 8 Page - Seiko Instruments Inc |
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S-7750C71XX-HCT1 Datasheet(HTML) 8 Page - Seiko Instruments Inc |
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8 / 44 page  PROGRAMMABLE PORT CONTROLLER (PORT EXPANDER WITH BUILT-IN E2PROM CIRCUIT) S-7750C Rev.1.1_00 Seiko Instruments Inc. 8 AC Electrical Characteristics Table 8 Measurement Conditions Input pulse voltage VIL = 0.1 ×VCCH, VIH = 0.9×VCCH Rising / falling time of input pulse 20 ns Output reference voltage 0.5 ×VCCH Output load 100 pF + Pull-up resistor 1.0 kΩ SDA C = 100 pF VCCH R = 1.0 k Ω Figure 7 Output Load Circuit Table 9 AC Electrical Characteristics VCCH = 2.3 to 4.5 V Item Symbol Min. Typ. Max. Unit SCL clock frequency *1 fSCL 0 − 400 kHz SCL clock time “L” *1 tLOW 1.0 − − µs SCL clock time “H” *1 tHIGH 0.9 − − µs SDA output delay time *1 tAA − − 0.9 µs SDA output hold time *1 tDH 50 − − ns Start condition setup time *1 tSU.STA 0.6 − − µs Start condition hold time *1 tHD.STA 0.6 − − µs Data input setup time *1 tSU.DAT 100 − − ns Data input hold time *1 tHD.DAT 0 − − ns Stop condition setup time *1 tSU.STO 0.6 − − µs SCL, SDA rise time *1 tR − − 0.3 µs SCL, SDA fall time *1 tF − − 0.3 µs Bus release time *1 tBUF 1.3 − − µs Noise suppression time tI − − 50 ns Frequency for external oscillation input *2 fTEX − − 400 kHz *1. The timing is defined by 10% and 90% of the waveform. *2. When selecting the option for external oscillation input. SCL SDA IN SDA OUT tBUF tR tSU.STO tSU.DAT tHD.DAT tDH tAA tHIGH tLOW tHD.STA tSU.STA tF Figure 8 Bus Timing |
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