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The MAX7365EWA70 is a (Maxim) I2C interface peripheral mainly for the management of microprocessors with up to 56 push-button switches ‌.

The MAX7365EWA70 mainly has the following functions:

Reduce the load on the processor

Up to 56 keys can be monitored

The FIFO can store up to 16 debouncing key events

A hardware interrupt is generated at the end of a FIFO level or a definable time period

Extend battery life

The automatic sleep and wake-up functions minimize power consumption

The dormant current is less than 1µA

Save circuit board space

Small size (2mm × 2mm), 25 solder ball WLP package

Flexible design

Power supply range: 1.62V to 3.6V

Proprietary false key detection and removal technology

Users can configure the key to shake the time from 1ms to 31ms

Adopt a low EMI static matrix monitoring design

Five additional GPIO ports

All key switches can be used as GPI

1Mbps, 2-wire serial port compatible with 5.5V

A two-wire serial bus timeout can be selected

Overview

The MAX7365EWA70 I2C interface peripheral provides up to 56 key switch management for the microprocessor.

Each time a key is pressed or released, a key value is generated, simplifying the design of the multi-key input scheme. The MAX7365EWA70 adopts static key input monitoring instead of dynamic scanning mode to ensure low EMI operation. The MAX7365EWA70 can be equipped with a metal switch or a resistive (carbon) switch up to 5kΩ.

The MAX7365EWA70 features automatic sleep and wake-up functions, thereby maintaining the lowest device power consumption. After one programmable sleep cycle, the automatic sleep function places the device in A low-power state (typically 1µA). When a key operation event occurs, the automatic wake-up function configuration device returns from the sleep state to the normal working mode.

The key controller de-shakes the key operation and saves the press and release events in the FIFO (including automatic repetition, if enabled). Interrupt output (/INT) can be configured for pair key events or maximum rate alarms.

Unused key switches can be used as GPI. In addition, the MAX7365EWA70 device has five additional general-purpose input/output (GPIO) ports. GPO can be programmed as push-pull or drain open output, high and low side output drivers. When set to open-drain output, a 100kΩ pull-up/pull-down resistor that can be selected on the enable chip.

The MAX7365EWA70 device adopts a small size (2mm x 2mm), 25 solder ball chip package (WLP), and is suitable for cellular phones, PDAs and other portable consumer products. It operates within an extended temperature range of -40°C to +85°C.

Application field

The MAX7365EWA70 is widely used in various fields, including:

Cellular phone

Handheld game console

Notebook computer

PDA

Portable consumer electronics

Key parameters

Application: Mobile phone, PDA

Interface: I2C

Voltage - Power supply: 1.62V to 3.6V

Packaging/Shell: 25-WLP

Immediately consult Mingjiada Electronics (www.hkmjd.com) for exclusive quotation of MAX7365EWA70 products.