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Analog Devices Inc./Maxim Integrated MAX7360EWX+
- Part No.:
- MAX7360EWX+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Sensor and Detector Interfaces
- Package:
- 36-WFBGA, WLBGA
- Datasheet:
-
MAX7360EWX+.pdf
- Description:
- SWITCH CONTROLLER AND LED DRIVER
- Quantity:
- Payment:
- Shipping:
Inventory:1,908
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Product details
Overview
MAX7360EWX+ from Maxim Integrated is an I²C-interfaced key-switch controller and LED driver/GPIO with integrated ESD protection, managing up to 64 key switches and eight constant-current LED drivers/GPIOs. It features 256-step PWM intensity control per port, rotary switch input capability on PORT6/PORT7, and autosleep/autowake modes for ultra-low-power operation (1.3µA sleep current). It targets compact portable consumer electronics requiring robust human-interface management.
For engineers reviewing the MAX7360EWX+ datasheet, MAX7360EWX+ pinout, MAX7360EWX+ application, or MAX7360EWX+ equivalent, this page delivers verified technical context, exact pin functions for the 36-bump WLP package, real-world use cases in handheld devices, and two validated alternative parts with documented functional trade-offs.
Technical Context
The MAX7360EWX+ implements static matrix scanning at 64kHz (derived from a 128kHz internal oscillator) to minimize EMI, with configurable 9–40ms key debounce and a 16-entry FIFO for debounced keypress/release events. Its GPIO subsystem supports independent 256-step PWM per port, common fade-in/out timing (256ms–4096ms), and software-configurable constant-current sink levels (5mA/10mA/15mA/20mA).
It integrates dual interrupt outputs-INTK for key events (FIFO- or time-triggered) and INTI for GPIO inputs-with open-drain outputs requiring external pull-ups. The device supports four I²C slave addresses via AD0 and includes bus timeout protection, while operating across +1.62V to +3.6V supply and –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Key Switch Capacity | Monitors up to 64 keys in 8×8 matrix; COL2–COL7 can be reconfigured as GPOs when fewer keys are needed. |
| LED Drive Capability | Eight open-drain ports (PORT0–PORT7), each programmable for 5/10/15/20mA constant-current sink and 256-step PWM intensity control. |
| Rotary Switch Interface | PORT6 and PORT7 form a dedicated 2-bit Gray-code input pair for mechanical rotary encoder interfacing. |
| Power Consumption | 1.3µA typical sleep current; 34µA typical operating current with all keys open; autosleep timeout programmable in 128ms increments. |
| I²C Interface | 400kbps standard-mode compatible, +5.5V tolerant, with selectable bus timeout and four address options (AD0-controlled). |
| ESD Protection | ±8kV contact / ±15kV air-gap per IEC 61000-4-2 on all I/O pins; ±2kV HBM on all pins. |
| Supply Range | +1.62V to +3.6V VCC; PORTx pins rated to +14V absolute maximum-enables direct LED drive from higher-voltage rails. |
Pinout & Package
MAX7360EWX+ uses a 36-bump wafer-level package (WLP), optimized for space-constrained portable applications such as smartphones and pocket PCs. Pin mapping follows the same functional assignment as the TQFN variant but in a smaller footprint with ball-grid layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ROW0–ROW7 | Key matrix row inputs | Static-scan current sources (up to 35µA) for low-EMI metallic/resistive switch detection (RKEY ≤ 5kΩ). |
| COL0–COL7 | Key matrix column outputs | Open-drain drivers; COL2–COL7 configurable as general-purpose outputs (GPOs) when not used for scanning. |
| PORT0–PORT5 | Constant-current LED/GPIO sinks | Individually PWM-controllable (256-step), 20mA max sink; support logic output or LED drive with fade timing. |
| PORT6, PORT7 | Rotary switch inputs / GPIOs | Dedicated 2-bit Gray-code decoder inputs; also usable as standard constant-current GPIOs when rotary mode disabled. |
| INTK, INTI | Active-low open-drain interrupts | INTK signals key events (FIFO level or timer); INTI signals GPIO input changes; both require external pull-up resistors. |
| SDA, SCL, AD0 | I²C interface and address select | +5.5V-tolerant, noise-filtered inputs; AD0 selects one of four I²C slave addresses (0x68–0x6B). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated ESD protection | Meets IEC 61000-4-2 Level 4 (±8kV contact, ±15kV air-gap) without external TVS diodes-reduces BOM count and board area. |
| Static key-scan architecture | Eliminates dynamic switching noise; enables routing near RF/analog sections without EMI mitigation components. |
| Autosleep + autowake | Reduces system standby power: enters 1.3µA sleep after programmable inactivity; wakes within 2ms + debounce time on keypress. |
| Per-port 256-step PWM | Enables precise brightness matching across multi-color LED arrays without external dimming ICs or current-setting resistors. |
| FIFO-based key event queuing | 16-deep hardware FIFO buffers debounced keypress/release events-including autorepeat codes-preventing host MCU overrun. |
Applications
| Smartphone Keypad Management | Handheld Game Console UI |
|---|---|
Use Scenario: Managing tactile keypad, side buttons, and rotary D-pad in battery-powered smartphones with strict EMI limits. IC Role / Device Role / Timing Role: Central key-scan and LED backlight controller; handles matrix scanning, debouncing, and PWM dimming autonomously via I²C. Use Value: Reduces host processor load by >90% vs. GPIO-based scanning; eliminates need for discrete LED drivers and ESD protection components. |
Use Scenario: Driving status LEDs, button illumination, and rotary encoder navigation in portable gaming hardware. IC Role / Device Role / Timing Role: Dual-role peripheral: scans mechanical buttons and drives RGB indicator LEDs with synchronized fade effects. Use Value: Enables smooth LED transitions (256ms–4096ms fade) and precise rotary position tracking without MCU timer resource consumption. |
| Industrial Handheld Terminal | Medical Portable Monitor UI |
Use Scenario: Supporting ruggedized membrane keypad and status indicators in field-deployed data collectors. IC Role / Device Role / Timing Role: ESD-hardened interface between unshielded front-panel switches and low-voltage application processor. Use Value: Withstands repeated ±15kV air-gap discharges in harsh environments; maintains reliable key detection despite high contact resistance (>3kΩ). |
Use Scenario: Controlling backlit membrane buttons and alarm LEDs in battery-operated patient monitors requiring low standby current. IC Role / Device Role / Timing Role: Low-power human-interface hub that remains responsive during 99%+ sleep duty cycle. Use Value: Achieves <2µA system standby contribution while preserving full wake-on-key functionality and LED visibility. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar key-switch and LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX7361EWX+ | Same die, identical pinout and register map; differs only in factory-programmed I²C address (0x69 vs. 0x68 default of MAX7360EWX+). | No functional difference; selected solely to avoid I²C address conflict in multi-device systems. | Drop-in replacement when address collision occurs; no firmware or layout change required. |
| TCA9554APWR | 8-bit I²C GPIO expander only-no key-scan engine, no PWM, no FIFO, no rotary input, no ESD rating beyond HBM. | Limited to basic digital I/O expansion; requires external debounce logic, LED drivers, and ESD protection for equivalent functionality. | Choose only if key-scan and LED control are handled elsewhere; not a functional substitute for MAX7360EWX+'s integrated features. |
Compared with MAX7360EWX+, MAX7361EWX+ offers identical performance with a fixed alternate I²C address-ideal for multi-controller designs-while TCA9554APWR provides only basic GPIO extension and cannot replace the MAX7360EWX+'s key-scan, LED drive, or ESD-hardened capabilities.
Availability
MAX7360EWX+ is available at Aetrix Electronics and suitable for smartphone keypad management, handheld game console UI, and industrial handheld terminal applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX7360EWX+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and consumer applications.
The MAX7360 product line was engineered specifically for space- and power-constrained portable electronics needing integrated, ESD-hardened human-interface control-combining key-scan, LED drive, and GPIO in a single WLP package.
FAQ
What is the package type and pin count of the MAX7360EWX+?
The MAX7360EWX+ uses a 36-bump wafer-level package (WLP), a compact, bottom-terminated chip-scale package designed for ultra-thin portable devices. It shares identical pin functionality with the 40-pin TQFN variant (MAX7360ETL+) but in a smaller footprint optimized for smartphones and pocket PCs.
Does the MAX7360EWX+ support rotary encoder inputs?
Yes-the MAX7360EWX+ includes dedicated rotary switch capability on PORT6 and PORT7, which accept 2-bit Gray-code inputs from mechanical encoders. This function is enabled via bit D7 in the GPIO Global Configuration Register (0x40), and operates independently of LED or GPIO modes.
What is the minimum and maximum supply voltage for the MAX7360EWX+?
The MAX7360EWX+ operates from +1.62V to +3.6V on its VCC pin. Its PORTx pins tolerate up to +14V, enabling direct connection to higher-voltage LED strings without level-shifting-critical for driving white LEDs from 5V or 12V rails while maintaining logic compatibility with low-voltage MCUs.
How does the MAX7360EWX+ handle key debouncing and event buffering?
The MAX7360EWX+ performs hardware-based key debouncing with user-configurable timing (9–40ms) and stores up to 16 debounced keypress/release events-including autorepeat codes-in a dedicated FIFO. Reading the FIFO register (0x00) retrieves events and automatically clears the INTK interrupt, offloading timing-critical tasks from the host MCU.
Can the MAX7360EWX+ drive LEDs directly without external current-limiting resistors?
Yes-the MAX7360EWX+ provides constant-current sink capability (5/10/15/20mA) on all eight PORTx pins. When configured in constant-current mode, it regulates LED current internally, eliminating the need for external resistors and enabling consistent brightness across varying forward voltages and temperature.
MAX7360EWX+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 36-WFBGA, WLBGA
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Controller
- Input Type:
- Logic
- Output Type:
- I2C, 2-Wire Serial
- Current - Supply:
- 50 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-WLP (2.57x2.57)
MAX7360EWX+ FAQ
1.How can I place an order for MAX7360EWX+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX7360EWX+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX7360EWX+ reliable?
The price and inventory of MAX7360EWX+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX7360EWX+ is usually 5 days.
3.What payment methods are accepted for MAX7360EWX+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX7360EWX+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX7360EWX+?
MAX7360EWX+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX7360EWX+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX7360EWX+?
For technical support, including MAX7360EWX+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX7360EWX+ requirements.
6.How does Aetrix verify that MAX7360EWX+ is sourced from the original manufacturer or authorized distributors?
All MAX7360EWX+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX7360EWX+ meets industry standards.
7.What is the process for return or replacement of MAX7360EWX+?
All MAX7360EWX+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX7360EWX+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX7360EWX+ part is unused and in its original packaging.
Return procedure for MAX7360EWX+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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