MAX7360
PRODUCTIONI²C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection
Provides 8kV Contact/15kV Air Gap Discharge IEC Standard ESD Protection on All Keys
- Part Models
- 2
- 1ku List Price
- Starting From $4.09
Overview
- Integrated ESD Protection
- ±8kV IEC 61000-4-2 Contact Discharge
- ±15kV IEC 61000-4-2 Air-Gap Discharge
- +14V Tolerant, Open-Drain I/O Ports Capable of Constant-Current LED Drive
- Rotary Switch-Capable Input Pair (PORT6, PORT7)
- 256-Step PWM Individual LED Intensity Control
- Individual LED Blink Rates and Common LED Fade In/Out Rates from 256ms to 4096ms
- FIFO Queues Up to 16 Debounced Key Events
- User-Configurable Key Debounce (9ms to 40ms)
- Keyscan Uses Static Matrix Monitoring for Low EMI Operation
- +1.62V to +3.6V Operation
- Monitors Up to 64 Keys
- Key-Switch Interrupt (Active-Low INTK) on Each Debounced Event/FIFO Level, or End of Definable Time Period
- Port Interrupt (Active-Low INTI) for Input Ports for Special-Key Functions
- 400kbps, +5.5V Tolerant 2-Wire Serial Interface with Selectable Bus Timeout
- Four I²C Address Choices
The MAX7360 I²C-interfaced peripheral provides microprocessors with management of up to 64 key switches, with an additional eight LED drivers/GPIOs that feature constant-current, PWM intensity control, and rotary switch control options.
The key-switch drivers interface with metallic or resistive switches with on-resistances up to 5kΩ. Key inputs are monitored statically, not dynamically, to ensure low-EMI operation. The MAX7360 features autosleep and autowake modes to further minimize the power consumption of the device. The autosleep feature puts the device in a low-power state (1µA typ) after a sleep timeout period. The autowake feature configures the MAX7360 to return to normal operating mode from sleep upon a keypress.
The key controller debounces and maintains a FIFO of keypress and release events (including autorepeat, if enabled). An interrupt (active-low INTK) output can be configured to alert keypresses, as they occur, or at maximum rate.
There are eight open-drain I/O ports, which can be used to drive LEDs. The maximum constant-current level for each open-drain port is 20mA. The intensity of the LED on each open-drain port can be individually adjusted through a 256-step PWM control. An input port pair (PORT6, PORT7) can be configured to accept 2-bit gray code inputs from a rotary switch. In addition, if not used for key-switch control, up to six column pins can be used as general-purpose open-drain outputs (GPOs) for LED drive or logic control.
The MAX7360 is offered in a 40-pin (5mm x 5mm) thin QFN package with an exposed pad, and a small 36-bump wafer level package (WLP) for cell phones, pocket PCs, and other portable consumer electronic applications. The MAX7360 operates over the -40°C to +85°C extended temperature range.
Applications
- Cell Phones
- Handheld Games
- Instrumentation
- PDAs
- Portable Consumer Electronics
- Printers
Documentation
Data Sheet 1
Reliability Data 1
Design Note 1
Video 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX7360ETL+ | LFCSP | ||
| MAX7360ETL+T | LFCSP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 20, 2016 - 1612 ASSEMBLY |
||
| MAX7360ETL+ | PRODUCTION | |
| MAX7360ETL+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Tools & Simulations
Software Development 1
Evaluation Kits
Evaluation Kit for the MAX7360
Reference Designs
MAXREFDES1265: Simple Keypad Interface Using the MAX32625PICO and MAX7360