Features

• I2C to 24-bit I/O ports expander

• 1MHz Fast-mode Plus I2C bus

• Operating voltage range of 1.65V to 5.5V for

both I2C bus and I/O ports

• Four adjustable I2C slave addresses via ADDR

• I2C multiple-register group programming with

global loop or local loop

• Active low reset input (̅R̅̅E̅̅S̅̅E̅̅T̅)

• Active low open-drain interrupt output (̅IN̅̅̅T̅)

• Internal power-on reset and I2C software reset

• Noise filter on SCL/SDA inputs

• Input/Output port configurable

• Input with polarity/latch/pull-up/pull-down/

interrupt functions

• Allowing port input voltage above supply

• Interrupt with trigger/mask/clear/status features

• Programmable input debounce enable/time

• Output with bank/pin selectable push-pull or

open-drain

• Bit-wise programmable output drive strength

• Low standby current of 4μA typical at 3.3V

• Maximum 25mA driving capability for each port

Applications

• Smartphone, Tablet and Wearables

• Laptop and Desktop

Brief Description

KTS1620 is a 24-bit general-purpose I/O expander via the

I2C bus for microcontrollers when additional I/Os are

needed while keeping interconnections to the minimum.

KTS1620 has separate power rails (VDD_I2C and VDD_P)

for I2C bus and I/O ports, both ranging from 1.65V to 5.5V,

allowing mixed power system where I2C bus power is not

compatible with I/O port power.

KTS1620 meets the I2C Fast-mode Plus spec up to 1MHz.

External reset input, internal power-on reset and I2C

software reset provide flexible ways to reset the IC. Four

adjustable I2C slave addresses allow multiple KTS1620s in

one I2C bus system.

KTS1620 provides multiple ways to program the 24-bit I/O

ports. When the port works as input, it can program the

polarity, latch, pull-up, pull-down and interrupt functions.

The interrupt function includes the level/edge trigger,

mask, clear, status features. For system with noisy input,

KTS1620 also provides debounce function with

programmable debounce time. When the port works as

output, it can program output stage with bank/pin

selectable push-pull or open-drain options, it can also

program four drive strengths of the output stage to optimize

the rise/fall times.

KTS1620 is available in a RoHS compliant 36-ball 2.6mm

x 2.6mm FO-WLP66 and a 32-lead 5mm x 5mm x

0.75mm Thin-QFN package.