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SCPS215F – SEPTEMBER 2009 – REVISED JULY 2017 TCA8418 I2C Controlled Keypad Scan IC With Integrated ESD Protection
1 Features 2 Applications 1 Operating Power-Supply Voltage Range of 1.65-V
to 3.6-V
Supports 80 Buttons With Use of 18 GPIOs
Supports QWERTY Keypad Operation Plus GPIO
Expansion
Low Standby (Idle) Current Consumption: 3 ОјA
Supports 1-MHz Fast Mode Plus I2C Bus
10 Byte FIFO to Store 10 Key Presses and
Releases
Open-Drain Active-Low Interrupt Output
Integrated Debounce Time of 50 Ојs
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 …