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Space-Saving, 8-Channel Relay/Load Driver

Product Details

The MAX4896 8-channel relay and load driver is designed for medium voltage applications up to 50V. This device is offered in a 20-pin, 5mm x 5mm TQFN package, resulting in substantial board space savings.

The MAX4896 8-channel relay driver offers built-in inductive kickback protection, drive for latching/nonlatching or dual-coil relays, and open-load and short-circuit fault detection.The MAX4896 also protects against overcurrent conditions. Each independent open-drain output features a 3Ω (typ) on-resistance, and is guaranteed to sink 200mA of load current (VS ≥ 4.5V).

A built-in overvoltage protection clamp handles kick-back-voltage transients, which are common when driving inductive loads. Thermal-shutdown circuitry shuts off all outputs (OUT_) when the junction temperature exceeds +160°C. The MAX4896 employs a reset input that allows the user to turn off all outputs simultaneously with a single control line.

The MAX4896 includes a 10MHz SPI™-/QSPI™-/MICROWIRE™-compatible serial interface. The serial interface is compatible with TTL-/CMOS-logic voltage levels and operates with a single +2.7V to +5.5V supply. In addition, the SPI output data can be used for diagnostics purposes including open-load and short-circuit fault detection.

The MAX4896 is offered in the extended (-40°C to +85°C) and (-40°C to +125°C) operating temperature ranges.

Key Features

  • Relay Driver Supports Medium Voltage Applications
    • Up to 50V Continuous Drain-to-Source Voltage
    • +2.7V to +5.5V Logic Supply Voltage
    • Guaranteed Drive Current: VS ≥ 4.5V: 200mA (All Channels On)/410mA (Individual Channels) VS ≤ 3.6V: 100mA
  • Integration and Small Packages Save Board Space
    • 5mm x 5mm, 20-Pin TQFN Package
  • Built-In Protection Circuitry Increases Safety
    • Built-In Output Clamp Protects Against Inductive Kickback
    • Open-Load and Short-Circuit Detection and Protection
    • Thermal Shutdown
    • Active-Low RESET Input Turns Off All Outputs Simultaneously
    • Active-Low FLAG Output for µP Interrupt
    • Built-in Power-On Reset
    • Temperature Range (-40°C to +125°C)
  • Serial Port Supports Most Microcontroller Architectures
    • SPI-/QSPI-/MICROWIRE-Compatible Serial Interface
    • Serial Digital Output for Daisy-Chaining and Diagnostics
  • Low Power Consumption Reduces Power Supply Requirements Saving System Cost
  • Low 100µA (Max) Quiescent Supply Current

Applications/Uses

  • ATE Systems
  • Industrial Equipment
  • Power-Grid Monitoring and Protection Equipment
  • White Goods
Parametric specs for Relay Drivers
ISOURCE @2.7V (mA) (guar. min) 70
RON @2.7V (Ω) (max) 6
IQ (µA) (max) 70
# Channels 8
Interface SPI
Package/Pins TQFN/20
Budgetary
Price (See Notes)
$3.60 @1k
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Simplified Block Diagram

MAX4896: Typical Operating Circuit MAX4896: Typical Operating Circuit Zoom icon

Technical Docs

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Parameters

Parametric specs for Relay Drivers
ISOURCE @2.7V (mA) (guar. min) 70
RON @2.7V (Ω) (max) 6
IQ (µA) (max) 70
# Channels 8
Interface SPI
Package/Pins TQFN/20
Budgetary
Price (See Notes)
$3.60 @1k

Key Features

  • Relay Driver Supports Medium Voltage Applications
    • Up to 50V Continuous Drain-to-Source Voltage
    • +2.7V to +5.5V Logic Supply Voltage
    • Guaranteed Drive Current: VS ≥ 4.5V: 200mA (All Channels On)/410mA (Individual Channels) VS ≤ 3.6V: 100mA
  • Integration and Small Packages Save Board Space
    • 5mm x 5mm, 20-Pin TQFN Package
  • Built-In Protection Circuitry Increases Safety
    • Built-In Output Clamp Protects Against Inductive Kickback
    • Open-Load and Short-Circuit Detection and Protection
    • Thermal Shutdown
    • Active-Low RESET Input Turns Off All Outputs Simultaneously
    • Active-Low FLAG Output for µP Interrupt
    • Built-in Power-On Reset
    • Temperature Range (-40°C to +125°C)
  • Serial Port Supports Most Microcontroller Architectures
    • SPI-/QSPI-/MICROWIRE-Compatible Serial Interface
    • Serial Digital Output for Daisy-Chaining and Diagnostics
  • Low Power Consumption Reduces Power Supply Requirements Saving System Cost
  • Low 100µA (Max) Quiescent Supply Current

Applications/Uses

  • ATE Systems
  • Industrial Equipment
  • Power-Grid Monitoring and Protection Equipment
  • White Goods

Description

The MAX4896 8-channel relay and load driver is designed for medium voltage applications up to 50V. This device is offered in a 20-pin, 5mm x 5mm TQFN package, resulting in substantial board space savings.

The MAX4896 8-channel relay driver offers built-in inductive kickback protection, drive for latching/nonlatching or dual-coil relays, and open-load and short-circuit fault detection.The MAX4896 also protects against overcurrent conditions. Each independent open-drain output features a 3Ω (typ) on-resistance, and is guaranteed to sink 200mA of load current (VS ≥ 4.5V).

A built-in overvoltage protection clamp handles kick-back-voltage transients, which are common when driving inductive loads. Thermal-shutdown circuitry shuts off all outputs (OUT_) when the junction temperature exceeds +160°C. The MAX4896 employs a reset input that allows the user to turn off all outputs simultaneously with a single control line.

The MAX4896 includes a 10MHz SPI™-/QSPI™-/MICROWIRE™-compatible serial interface. The serial interface is compatible with TTL-/CMOS-logic voltage levels and operates with a single +2.7V to +5.5V supply. In addition, the SPI output data can be used for diagnostics purposes including open-load and short-circuit fault detection.

The MAX4896 is offered in the extended (-40°C to +85°C) and (-40°C to +125°C) operating temperature ranges.

Simplified Block Diagram

MAX4896: Typical Operating Circuit MAX4896: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal