GUI for evaluation module (EVM)
TCA8418E
18-bit 1.65- to 3.6-V 1MHz I2C/SMBus keypad scanner with interrupt, reset & 80 key support
Data sheet
TCA8418E
- Operating Power-Supply Voltage Range of 1.65-V
to 3.6-V - ±15-kV Human Body Model High Voltage ESD
(GPIO lines) - Supports 80 Buttons With Use of 18 GPIOs
- Supports QWERTY Keypad Operation Plus GPIO
Expansion - Low Standby (Idle) Current Consumption: 3 µA
- 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 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 Package
- WCSP (YFP): 2 mm × 2 mm; 0.4 mm pitch
- APPLICATIONS
- Smart Phones
- Tablets
- HMI Panels
- GPS Devices
- MP3 Players
- Digital Cameras
All other trademarks are the property of their respective owners
The TCA8418E 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.
The TCA8418E saves power and bandwidths since it handles the keypad scanning algorithms. The TCA8418E is also ideal for usage with processors that have limited GPIOs.
The key controller debounces inputs and maintains a 10 byte FIFO of key-press and release events which can store up to 10 keys with overflow wrap capability. An interrupt (INT) output can be configured to alert key presses and releases either as they occur, or at maximum rate. A CAD_INT pin is included to indicate the detection of CTRL-ALT-DEL (essentially, 1, 11, 21) key press action.
Technical documentation
No results found. Please clear your search and try again.
View all 7 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TCA8418E I2C Controlled Keypad Scan IC With Integrated ESD Protection datasheet (Rev. C) | PDF | HTML | 28 Oct 2015 |
| Application note | Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) | PDF | HTML | 03 Jul 2024 | |
| Selection guide | I2C Infographic Flyer | 03 Dec 2015 | ||
| Application note | Understanding the I2C Bus | PDF | HTML | 30 Jun 2015 | |
| Application note | Maximum Clock Frequency of I2C Bus Using Repeaters | 15 May 2015 | ||
| Application note | I2C Bus Pull-Up Resistor Calculation | PDF | HTML | 13 Feb 2015 | |
| EVM User's guide | TCA8418E Keypad Scan EVM User's Guide | 23 Aug 2014 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
TCA8418E-EVM — TCA8418E-EVM I2C Controlled Keypad Scan IC With Integrated ESD Protection Evaluation Module
The TCA8418E-EVM is an evaluation board designed to demonstrate the key scanning functionality of the TCA8418E keypad scan IC. The EVM comes with 9 buttons configured in a row/column matrix for easy testing. In addition, the 10x2 receptacle allows the customer to expand the functionality of the (...)
User guide: PDF
Design tool
I2C-DESIGNER — I2C designer tool
Use the I2C Designer tool to quickly resolve conflicts in addressing, voltage level and frequency in I2C based designs. Enter master and slave inputs to automatically generate an I2C tree or easily build a custom solution. This tool will help designers save time and comply with the I2C standard (...)
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool
TINA-TI — SPICE-based analog simulation program
TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
User guide: PDF
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| DSBGA (YFP) | 25 | Ultra Librarian |
Ordering & quality
Information included:
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Information included:
- Fab location
- Assembly location
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
TI E2E™ forums with technical support from TI engineers
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.