TCA8418E
18 Bit 1,65- bis 3,6 V, 1 MHz, I2C/SMBus-Tastaturscanner mit Unterstützung für Interrupt, Reset und
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.
Technische Dokumentation
Typ | Titel | Datum | ||
---|---|---|---|---|
* | Data sheet | TCA8418E I2C Controlled Keypad Scan IC With Integrated ESD Protection datasheet (Rev. C) | PDF | HTML | 28 Okt 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 Dez 2015 | ||
Application note | Understanding the I2C Bus | PDF | HTML | 30 Jun 2015 | |
Application note | Maximum Clock Frequency of I2C Bus Using Repeaters | 15 Mai 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 und Entwicklung
Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.
TCA8418E-EVM — TCA8418E-EVM I2C-gesteuerter Tastatur-Scan-IC mit integriertem ESD-Schutz – Evaluierungsmodul
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 (...)
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Gehäuse | Pins | CAD-Symbole, Footprints und 3D-Modelle |
---|---|---|
DSBGA (YFP) | 25 | Ultra Librarian |
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