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PCF8575C Datasheet(PDF) 9 Page - Texas Instruments |
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PCF8575C Datasheet(HTML) 9 Page - Texas Instruments |
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9 / 26 page  www.ti.com Electrical Characteristics I2C Interface Timing Requirements PCF8575C REMOTE 16-BIT I2C AND SMBus LOW-POWER I/O EXPANDER WITH INTERRUPT OUTPUT SCPS123C – MARCH 2005 – REVISED JULY 2006 over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VCC MIN TYP(1) MAX UNIT 4.5 V to 5.5 VIK Input diode clamp voltage II = –18 mA –1.2 V V VPOR Power-on reset voltage(2) VI = VCC or GND, IO = 0 VPOR 1.2 1.8 V IOHT P-port transient pullup current High during ACK VOH = GND 4.5 V –0.5 –1 mA 4.5 V to 5.5 SDA VOL = 0.4 V 3 V VOL = 0.4 V 5 15 4.5 V to 5.5 IOL P port mA V VOL = 1 V 10 25 4.5 V to 5.5 INT VOL = 0.4 V 1.6 V SCL, SDA ±2 4.5 V to 5.5 II VI = VCC or GND µA V A0, A1, A2 ±1 4.5 V to 5.5 IIHL P port VI ≥ VCC or VI ≤ GND ±400 µA V Operating mode VI = VCC or GND, IO = 0, fSCL = 400 kHz 100 200 ICC 5.5 V µA Standby mode VI = VCC or GND, IO = 0, fSCL = 0 kHz 2.5 10 One input at VCC – 0.6 V, 4.5 V to 5.5 ∆I CC Supply current increase 200 µA Other inputs at VCC or GND V 4.5 V to 5.5 Ci SCL VI = VCC or GND 3 7 pF V SDA 3 7 4.5 V to 5.5 Cio VIO = VCC or GND pF V P port 4 10 (1) All typical values are at VCC = 5 V, TA = 25°C. (2) The power-on reset circuit resets the I2C bus logic with VCC < VPOR and sets all I/Os to logic high (with current source to VCC). over recommended operating free-air temperature range (unless otherwise noted) (see Figure 6) MIN MAX UNIT fscl I2C clock frequency 400 kHz tsch I2C clock high time 0.6 µs tscl I2C clock low time 1.3 µs tsp I2C spike time 50 ns tsds I2C serial-data setup time 100 ns tsdh I2C serial-data hold time 0 ns ticr I2C input rise time 20 + 0.1Cb(1) 300 ns ticf I2C input fall time 20 + 0.1Cb(1) 300 ns tocf I2C output fall time (10-pF to 400-pF bus) 300 ns tbuf I2C bus free time between stop and start 1.3 µs tsts I2C start or repeated start condition setup 0.6 µs tsth I2C start or repeated start condition hold 0.6 µs tsps I2C stop condition setup 0.6 µs tvd Valid-data time SCL low to SDA output valid 1.2 µs Cb I2C bus capacitive load 400 pF (1) Cb = total bus capacitance of one bus line in pF 9 Submit Documentation Feedback |
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