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PCF8575PW Datasheet(PDF) 9 Page - Texas Instruments |
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PCF8575PW Datasheet(HTML) 9 Page - Texas Instruments |
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9 / 32 page  www.ti.com Electrical Characteristics I2C Interface Timing Requirements PCF8575 REMOTE 16-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT SCPS121D – JANUARY 2005 – REVISED APRIL 2007 over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VCC MIN TYP(1) MAX UNIT VIK Input diode clamp voltage II = –18 mA 2.5 V to 5.5 V –1.2 V VPOR Power-on reset voltage(2) VI = VCC or GND, IO = 0 VPOR 1.2 1.8 V IOH P port VO = GND 2.5 V to 5.5 V –30 –300 µA IOHT P-port transient pullup current High during ACK, VOH = GND 2.5 V –0.5 –1 mA SDA VOL = 0.4 V 3 VOL = 0.4 V 5 15 IOL P port 2.5 V to 5.5 V mA VOL = 1 V 10 25 INT VOL = 0.4 V 1.6 SCL, SDA ±5 II VI = VCC or GND 2.5 V to 5.5 V µA A0, A1, A2 ±1 IIHL P port VI ≥ VCC or VI ≤ GND 2.5 V to 5.5 V ±400 µA 5.5 V 100 200 VI = VCC or GND, IO = 0, Operating mode 3.6 V 30 75 fscl = 400 kHz 2.7 V 20 50 ICC µA 5.5 V 2.5 10 Standby mode VI = VCC or GND, IO = 0, fscl = 0 kHz 3.6 V 2.5 10 2.7 V 2.5 10 One input at VCC – 0.6 V, ∆I CC Supply current increase 2.5 V to 5.5 V 200 µA Other inputs at VCC or GND CI SCL VI = VCC or GND 2.5 V to 5.5 V 3 7 pF SDA 3 7 Cio VIO = VCC or GND 2.5 V to 5.5 V pF P port 4 10 (1) All typical values are at nominal supply voltage (2.5-V, 3.3-V, or 5-V VCC) and 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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