TCA8418 - TI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

TCA8418
Manufacturer

TI
ChipWorker Part#

CW334494110
RoHS

Lead free / RoHS Compliant
Description

I2C CONTROLLED KEYPAD SCAN IC WITH INTEGRATED ESD PROTECTION
Documentation

Datasheet

TCA8418 Global Supplier

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TCA8418 Specifications

Attribute	Attribute Value

Part Number	TCA8418
Manufacturer	TI
ChipWorker Part#	CW334494110
Documentation	Datasheet
	expand all
RoHS	RoHS Compliant
Lead-Free Status	Lead Free

Product Description

DESCRIPTION
The TCA8418 is a keypad scan device with integrated ESD protection. It can operate from 1.65 V
to 3.6 V and has 18 general purpose inputs/outputs (GPIO) that can be used to support up to 80 keys via the I2C interface [serial clock (SCL), serial data (SDA)].
FEATURES
• Operating Power-Supply Voltage Range of 1.65 V to 3.6 V
• Supports QWERTY Keypad Operation Plus GPIO Expansion
• 18 GPIOs Can Be Configured into Eight Inputs and Ten Outputs to Support an 8 × 10 Keypad
Array (80 Buttons)
• ESD Protection Exceeds JESD 22 on all 18 GPIO Pins and non GPIO pins
– 2000-V Human Body Model (A114-A)
– 1000-V Charged Device Model (C101)
• Low Standby (Idle) Current Consumption: 3 µA
• Polling Current Drain 70 µA for One Key Pressed
• 10 Byte FIFO to Store 10 Key Presses and Releases
• Supports 1-MHz Fast Mode Plus I2C Bus
• Open-Drain Active-Low Interrupt Output, Asserted when Key is Pressed and Key is Released
• Minimum Debounce Time of 50 µs
• Schmitt-Trigger Action Allows Slow Input Transition and Better Switching Noise
Immunity at the SCL and SDA Inputs: Typical Vhys at 1.8 V is 0.18 V
• Latch-Up Performance Exceeds 200 mA Per JESD 78, Class II
• Very Small Packages
– WCSP (YFP): 2 mm × 2 mm; 0.4 mm pitch
– QFN (RTW): 4 mm × 4 mm; 0.5 mm pitch

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