MAX7313

PRODUCTION

16-Port I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection

8- and 16-Port I/O Expanders with IRQ and Low Standby Current Ideal for Portable Applications

Data Sheet (Rev. 5) Product Selection Table
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Overview

  • 400kbps, 2-Wire Serial Interface, 5.5V Tolerant
  • 2V to 3.6V Operation
  • Overall 8-Bit PWM LED Intensity Control
    • Global 16-Step Intensity Control
    • Individual 16-Step Intensity Controls
  • Two-Phase LED Blinking
  • High Output Current (50mA max Per Port)
  • Outputs are 5.5V-Rated Open Drain
  • Supports Hot Insertion
  • Inputs are Overvoltage Protected to 5.5V
  • Transition Detection with Interrupt Output
  • 1.2µA (typ), 3.6µA (max) Standby Current
  • Small 4mm x 4mm TQFN Package
  • -40°C to +125°C Temperature Range
  • All Ports Can Be Configured as Inputs or Outputs

The MAX7313 I²C-compatible serial interfaced peripheral provides microprocessors with 16 I/O ports. Each I/O port can be individually configured as either an open-drain current-sinking output rated at 50mA and 5.5V, or a logic input with transition detection. A 17th port can be used for transition detection interrupt, or as a general-purpose output. The outputs are capable of driving LEDs, or providing logic outputs with external resistive pullup up to 5.5V.

PWM current drive is integrated with 8 bits of control. Four bits are global control and apply to all LED outputs to provide coarse adjustment of current from fully off to fully on with 14 intensity steps. Each output then has individual 4-bit control, which further divides the globally set current into 16 more steps. Alternatively, the current control can be configured as a single 8-bit control that sets all outputs at once.

Each output has independent blink timing with two blink phases. All LEDs can be individually set to be on or off during either blink phase, or to ignore the blink control. The blink period is controlled by a register.

The MAX7313 supports hot insertion. All port pins, the active-low INT output, SDA, SCL, and the slave-address inputs AD0-2 remain high impedance in power-down (V+ = 0V) with up to 6V asserted upon them.

The MAX7313 is controlled through the 2-wire I²C/SMBus serial interface, and can be configured to any one of 64 I²C addresses.

Applications

  • Keypad Backlights
  • LCD Backlights
  • LED Status Indication
  • Notebook Computers
  • Portable Equipment
  • RGB LED Drivers
MAX7313
16-Port I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection
MAX7313: Typical Application Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Design Note 1

Technical Articles 3

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Software Resources

Device Drivers 1

Hardware Ecosystem

Parts Product Life Cycle Description
I/O Expanders 9
MAX7315
PRODUCTION 8-Port I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection
MAX7312
PRODUCTION 2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protection
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
MAX7311
PRODUCTION 2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protection
MAX7314
PRODUCTION 18-Port GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection
MAX7316
10-Port I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection
MAX7317
PRODUCTION 10-Port SPI-Interfaced I/O Expander with Overvoltage and Hot-Insertion Protection
MAX7318
PRODUCTION 2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection
LED Drivers 5
MAX7310
PRODUCTION 2-Wire-Interfaced 8-Bit I/O Port Expander with Reset
MAX6965
PRODUCTION 9-Output LED Driver with Intensity Control and Hot-Insertion Protection
MAX6964
PRODUCTION 17-Output LED Driver/GPO with Intensity Control and Hot-Insertion Protection
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
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Tools & Simulations

Software Development 1

Evaluation Kits

MAX7313EVKIT

Evaluation Kit for the MAX7313

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Features and Benefits

  • Evaluates Four RGB and Four White LEDs
  • Independent Output Control of Each LED
  • Relay Driving Capable
  • PC Interface or User-Supplied I²C Interface
  • Windows 2000/XP/Vista (32-Bit)-Compatible Software
  • USB Powered
  • Surface-Mount Components
  • Fully Assembled and Tested

Product Details

The MAX7313 evaluation kit (EV kit) is a fully assembled and tested surface-mount, 16-output LED driver circuit board. The circuit uses the MAX7313 IC, a 16-port GPIO with LED intensity control, interrupt, and hot-insertion protection. The EV kit includes four RGB LEDs and four white LEDs (WLEDs) that can be controlled simultaneously by the MAX7313. The EV kit demonstrates the MAX7313 IC's 8-bit PWM LED intensity control, 2-phase LED blinking, interrupt output, four-level I²C addressing feature.

The MAX7313 EV kit provides printed-circuit board (PCB) pads for the MAX7313 I²C serial-interface signals. A Windows 2000/XP/Vista®-compatible software is provided to access the MAX7313 IC. The MAX7313 EV kit can also be directly interfaced to a user-provided I²C system.
MAX7313EVKIT
Evaluation Kit for the MAX7313

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