MAX7315
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MAX7315

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

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 6
1ku List Price Starting From $2.12
Features
  • 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
    • Plus Individual 16-Step Intensity Control
  • Automatic Two-Phase LED Blinking
  • 50mA Maximum Port Output Current
  • Outputs Are 5.5V-Rated Open Drain
  • Inputs Are Overvoltage Protected to 5.5V
  • Transition Detection with Interrupt Output
  • Low Standby Current (1.2µA typ; 3.3µA max)
  • Tiny 3mm x 3mm, Thin QFN Package
  • -40°C to +125°C Temperature Range
  • All Ports Can Be Configured as Inputs or Outputs
Additional Details
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The MAX7315 I²C-/SMBus™-compatible serial interfaced peripheral provides microprocessors with 8 I/O ports. Each I/O port can be individually configured as either an open-drain current-sinking output rated at 50mA at 5.5V, or a logic input with transition detection. A ninth port can be used for transition detection interrupt or as a general-purpose output. The outputs are capable of directly 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 in 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.

The MAX7315 is pin and software compatible with the PCA9534 and PCA9554(A).

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 MAX7315 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 MAX7315 is controlled through the 2-wire I²C/SMBus serial interface, and can be configured to one of 64 I²C addresses.

Applications

  • Cell Phones
  • Keypad Backlights
  • Laptop Computers
  • LCD Backlights
  • LED Status Indication
  • Portable Equipment
  • RGB LED Drivers
Part Models 6
1ku List Price Starting From $2.12

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX7315AEE+
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MAX7315AEE+T
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MAX7315ATE+
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MAX7315ATE+T
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MAX7315AUE+
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MAX7315AUE+T
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Filter by Model

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Part Models

Product Lifecycle

PCN

Jan 24, 2019

- 1746N

ASSEMBLY

MAX7315AEE+

PRODUCTION

MAX7315AEE+T

PRODUCTION

Oct 22, 2020

- 2054A

ASSEMBLY

MAX7315ATE+

PRODUCTION

MAX7315ATE+T

PRODUCTION

Jun 20, 2016

- 1612

ASSEMBLY

MAX7315ATE+

PRODUCTION

MAX7315ATE+T

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Jan 24, 2019

- 1746N

arrow down

ASSEMBLY

MAX7315AEE+

PRODUCTION

MAX7315AEE+T

PRODUCTION

Oct 22, 2020

- 2054A

arrow down

ASSEMBLY

MAX7315ATE+

PRODUCTION

MAX7315ATE+T

PRODUCTION

Jun 20, 2016

- 1612

arrow down

ASSEMBLY

MAX7315ATE+

PRODUCTION

MAX7315ATE+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX7315EVKIT

Evaluation Kit for the MAX7315

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MAX7315EVKIT

Evaluation Kit for the MAX7315

Evaluation Kit for the MAX7315

Features and Benefits

  • 400kHz, 5.5V-Tolerant, 2-Wire Serial Interface
  • 2V to 3.6V Operation
  • High Output Current—Each Port 50mA (max)
  • 5.5V-Rated Open-Drain Outputs
  • Proven PCB Layout
  • Windows 98SE/2000/XP-Compatible Evaluation Software
  • Fully Assembled and Tested
  • EV System Includes USB Connectivity
  • Product Detail

    The MAX7315 evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the capabilities of the MAX7315 8-port I/O expander with LED intensity control, interrupt, and hot-insertion protection. The MAX7315 EV kit also includes Windows® 98SE/2000/XP-compatible software that which provides a simple graphical user interface (GUI) for exercising the features of the MAX7315.

    The MAX7315 evaluation system (EV system) consists of the MAX7315 EV kit and a companion CMAXQUSB serial-interface board. The CMAXQUSB interface board allows a PC to control an I²C interface using its USB port. Order the MAX7315EVCMAXQU+ for a complete PC-based evaluation of the MAX7315. Order the MAX7315EVKIT+ if you already have a MAX7315-compatible serial interface.

    Applications

    • Cell Phones
    • Keypad Backlights
    • Laptop Computers
    • LCD Backlights
    • LED Status Indication
    • Portable Equipment
    • RGB LED Drivers

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