MAX7307
SMBus/I²C Interfaced 4-Port, Level-Translating GPIOs and LED Drivers
Low Operating Supply Voltage LED Drivers with Blinking, Transition Detection, and Level Translation in a Very Small Package Ideal for Cellular and Smartphone Applications
Part Details
- 1.4V to 5.5V I/O Level Translation Port Supply (VLA)
- 1.62V to 3.6V Power Supply
- Four Individually Configurable GPIO Ports
- P1 = Open-Drain I/O
- P2, P3, P4 = Push-Pull or Open-Drain I/O
- Individual 33-Step PWM Intensity Control
- Blink Controls with 15 Steps on Outputs
- 1kHz PWM Period Provides Flicker-Free LED Intensity Control
- 25mA (max) Port Output Sink Current (100mA max Ground Current)
- Inputs Overvoltage Protected Up to 5.5V (VLA)
- Transition Detection with Optional Interrupt Output
- Optional Input Debouncing
- Active-Low RST Input Clears Serial Interface, Can Restore Power-Up Default State, and Synchronizes Blink Timing
- Oscillator Input and Output Enables Cascading Multiple Devices
- Low 0.75µA (typ) Standby Current
The MAX7306/MAX7307 I²C-/SMBus™-compatible, serial-interfaced peripherals feature four level-translating I/Os and operate from a 1.62V to 3.6V power supply. The MAX7307 features a port supply (VLA) that allows level translation on I/O ports to operate from a separate power supply from 1.4V to 5.5V. The MAX7306 features an address select input (AD0) to allow up to four unique slave addresses.
The MAX7306/MAX7307 ports P2, P3, and P4 can be configured as inputs, push-pull outputs, and open-drain outputs. Port P1 can be configured as a general-purpose input, open-drain output, or an open-drain active-low INT output. Ports P2 and P3 can be configured as OSCIN and OSCOUT, respectively. The MAX7306/MAX7307 include an internal oscillator for PWM, blink, and key debounce, or to cascade multiple MAX7306/MAX7307s. The external clock can be used to set a specific PWM and blink timing. The active-low RST input asynchronously clears the 2-wire interface and terminates a bus lockup involving the MAX7306/MAX7307.
All ports configured as output feature 33-step PWM, allowing any output to be set from fully off, 1/32 to 31/32 duty cycle, to fully on. All output ports also feature LED blink control, allowing blink periods of 1/8 second, 1/4 second, 1/2 second, 1, 2, 4, or 8 seconds. Any port can blink during this period with a 1/16 to 15/16 duty cycle.
The MAX7306/MAX7307 are specified over the -40°C to +125°C temperature range and are available in 10-pin µDFN (2mm x 2mm) and 10-pin µMAX® packages.
Applications
- Cell Phones
- LCD/Keypad Backlights
- LED Status Indicators
- System I/O Ports
Documentation
Data Sheet 1
Reliability Data 1
Design Note 2
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Direct from Battery LED/GPIO Drivers 2 | ||
| MAX7300 | PRODUCTION | 2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port I/O Expander |
| MAX7301 | PRODUCTION | 4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O Expander |
| Display Driver Electronics 4 | ||
| MAX6956 | PRODUCTION | 2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port LED Display Driver and I/O Expander |
| MAX6957 | PRODUCTION | 4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port LED Display Driver and I/O Expander |
| MAX6964 | PRODUCTION | 17-Output LED Driver/GPO with Intensity Control and Hot-Insertion Protection |
| MAX6965 | PRODUCTION | 9-Output LED Driver with Intensity Control and Hot-Insertion Protection |
| Product 1 | ||
| MAX7302 | SMBus/I²C Interfaced 9-Port, Level-Translating GPIO and LED Driver with CLA | |
Evaluation Kits
Evaluation Kit/Evaluation System for the MAX7307
Evaluation Kit/Evaluation System for the MAX7307
MAX7306 Evaluation Kit/Evaluation System
MAX7306 Evaluation Kit/Evaluation System
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