TCA8418EYFPR
Active18-BIT 1.65- TO 3.6-V 1MHZ I2C/SMBUS KEYPAD SCANNER WITH INTERRUPT, RESET & 80 KEY SUPPORT
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TCA8418EYFPR
Active18-BIT 1.65- TO 3.6-V 1MHZ I2C/SMBUS KEYPAD SCANNER WITH INTERRUPT, RESET & 80 KEY SUPPORT
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Technical Specifications
Parameters and characteristics for this part
| Specification | TCA8418EYFPR |
|---|---|
| Applications | PDA's, Portable Audio/Video, Smartphones |
| Interface | I2C, 2-Wire Serial |
| Mounting Type | Surface Mount |
| Package / Case | DSBGA, 25-XFBGA |
| Supplier Device Package | 25-DSBGA |
| Voltage - Supply [Max] | 3.6 V |
| Voltage - Supply [Min] | 1.65 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 1.76 | |
| 10 | $ 1.58 | |||
| 25 | $ 1.49 | |||
| 100 | $ 1.27 | |||
| 250 | $ 1.19 | |||
| 500 | $ 1.04 | |||
| 1000 | $ 0.86 | |||
| Digi-Reel® | 1 | $ 1.76 | ||
| 10 | $ 1.58 | |||
| 25 | $ 1.49 | |||
| 100 | $ 1.27 | |||
| 250 | $ 1.19 | |||
| 500 | $ 1.04 | |||
| 1000 | $ 0.86 | |||
| Tape & Reel (TR) | 3000 | $ 0.74 | ||
| Texas Instruments | LARGE T&R | 1 | $ 1.29 | |
| 100 | $ 1.07 | |||
| 250 | $ 0.77 | |||
| 1000 | $ 0.58 | |||
Description
General part information
TCA8418E Series
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. ACAD_INTpin is included to indicate the detection of CTRL-ALT-DEL (essentially, 1, 11, 21) key press action.
Documents
Technical documentation and resources
