MAX7360ETL+ by Analog Devices

I²C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection


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. How to Program the MAX7360 Key Switch Controller using the Arduino IDE

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Prices starting from US$4.21

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Features

Integrated ESD Protection ±8kV IEC 61000-4-2 Contact Discharge ±15kV IEC 61000-4-2 Air-Gap Discharge
±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

Specifications

Interface Serial 2-Wire 400kbit
Keys (max) 64
ISUPPLY (µA) (typ) 35
ISHUTDN (µA) (typ) 1.5
Interrupt Output Yes
Key Scan I2C Slave IDs 4
GPIO 8 GPIO
VSUPPLY (V) 1.62 to 3.6
Package/Pins TQFN/40
BudgetaryPrice (See Notes) 3.82


MAX7360ETL+ IC Sensors by Analog Devices

KEY SWITCH CTRL W/LED DRIVER TQFN-40

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

IC Function Key Switch Controller & LED Driver
Supply Voltage Min 1.62V
Supply Voltage Max 3.6V
IC Package Type TQFN
No. of Pins 40Pins
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

I²C-Interfaced Key-Switch Cont | Analog Devices
KEY SWITCH CTRL W/LED DRIVER, TQFN-40 | element14
Key Switch Ctrl W/Led Driver, Tqfn-40 | Newark Electronics

Frequently Asked Questions

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Is the MAX7360ETL+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

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