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Download IS31IO7325 - Integrated Silicon Solution
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Transcript
IS31IO7325 TIMING CHARACTERISTICS VCC = 2.4V ~ 5.5V, TA = -40°C ~ +125°C, unless otherwise noted. Typical values are VCC = 3.3V, TA = 25°C. (Note 3) Symbol Parameter Condition Min. Typ. Max. Unit 400 kHz fSCL Serial-clock frequency tBUF Bus free time between a STOP and a START condition 1.3 μs tHD, STA Hold time (repeated) START condition 0.6 μs tSU, STA Repeated START condition setup time 0.6 μs tSU, STO STOP condition setup time 0.6 μs tHD, DAT Data hold time tSU, DAT Data setup time 100 ns tLOW SCL clock low period 1.3 μs tHIGH SCL clock high period 0.7 μs 0.9 (Note 2) μs tR Rise time of both SDA and SCL signals, receiving (Note 4) 20 + 0.1Cb 300 ns tF Fall time of both SDA and SCL signals, receiving (Note 4) 20 + 0.1Cb 300 ns Fall time of SDA transmitting (Note 4) 20 + 0.1Cb 250 ns tSP Pulse width of spike suppressed (Note 5) 50 Cb Capacitive load for each bus line tW RSTB pulse width tF, TX tRSTB ns 400 RSTB rising to START condition setup time pF 500 ns 1 μs Port and Interrupt INTB Timing Characteristic VCC = 2.4V ~ 5.5V, TA = -40°C ~ +125°C, unless otherwise noted. Typical values are VCC = 3.3V, TA = 25°C. (Note 3) Parameter Symbol Condition Min. Typ. Max. Unit Port output data valid tPV CL⤠100pF 4 μs Port input setup time tPSU CL⤠100pF 0 μs Port input hold time tPH CL⤠100pF 4 μs INTB input data valid time tIV CL⤠100pF 4 μs INTB reset delay time from acknowledge tIR CL⤠100pF 4 μs Note 1: All parameters are tested at TA = 25°C. Specifications over temperature are guaranteed by design. Note 2: A master device must provide a hold time of at least 300ns for the SDA signal (referred to VIL of the SCL signal) in order to bridge the undefined region of SCLâs falling edge. Note 3: Guaranteed by design. Note 4: Cb = total capacitance of one bus line in pF. ISINK ⤠6mA. tR and tF measured between 0.3 à VCC and 0.7 à VCC. Note 5: Input filters on the SDA and SCL inputs suppress noise spikes less than 50ns. Integrated Silicon Solution, Inc. â www.issi.com Rev. C, 01/03/2014 6
