The Texas Instruments TCA8418RTWR is a specialized interface IC that acts as a keypad controller, communicating over an I2C, 2-Wire Serial bus. It is designed for portable electronics such as PDAs, Portable Audio/Video players, and Smartphones, where a dedicated keypad scan engine offloads the main processor from polling rows and columns. Packaged in a 24-WQFN (4x4 mm) with an exposed pad, it is a surface-mount device.
TCA8418RTWR I2C Keypad Controller, 1.65V-3.6V, 24-WQFN
MPNTCA8418RTWR
End of Life
Texas Instruments TCA8418RTWR, I2C keypad controller, 1.65V-3.6V supply, 24-WQFN (4x4) exposed pad, surface mount, active production.
$1.78Ref. price · indicative, final on quote
Packaging24-WFQFN Exposed Pad
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Mounting | Surface Mount |
| Supply voltage | 1.65V ~ 3.6V |
| Interface | I²C, 2-Wire Serial |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Applications | PDA's, Portable Audio/Video, Smartphones |
| Case | 24-WFQFN Exposed Pad |
Product details
Frequently asked questions
Is TCA8418RTWR compatible with I2C logic levels?
Yes. With a supply range of 1.65V to 3.6V, the TCA8418RTWR is compatible with both 1.8V and 3.3V I2C logic levels. No external level shifter is required when the host I2C master operates at the same VDD or uses open-drain pull-ups to the TCA8418's supply.