TCA9554 datasheet(13/48 Pages) TI2

Part #	TCA9554

Description	TCA9554 Low Voltage 8-Bit I2C and SMBus Low-Power I/O Expander With Interrupt Output and Configuration Registers

PDF	48 Pages

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Manufacturer	TI2 [Texas Instruments]

Direct Link	https://www.ti.com

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13 / 48 page

Write Mode (R/

= 0)

P-Port Load Configuration

DUT

CL = 50 pF

(see Note A)

2 × VCC

500

Read Mode (R/

= 1)

0.7 × VCC

0.3 × VCC

SCL

0.7 × VCC

0.3 × VCC

tps

tph

0.7 × VCC

0.3 × VCC

SCL

tpv

(see Note B)

Slave

ACK

Unstable

Data

Last Stable Bit

SDA

TCA9554

www.ti.com

SCPS233E – MARCH 2012 – REVISED FEBRUARY 2017

Product Folder Links: TCA9554

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Parameter Measurement Information (continued)

CL includes probe and jig capacitance.

tpv is measured from 0.7 × VCC on SCL to 50% I/O (Pn) output.

All inputs are supplied by generators having the following characteristics: PRR

≤ 10 MHz, ZO = 50 Ω, tr/tf ≤ 30 ns.

The outputs are measured one at a time, with one transition per measurement.

All parameters and waveforms are not applicable to all devices.

Figure 13. P-Port Load Circuit and Voltage Waveforms

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