Relay Driver 20-Pin TQFN EP

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 3O (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 automotive (-40°C to +125°C) operating temperature ranges.

• Supports Up to 50V Continuous Drain-to-Source Voltage
• Guaranteed Drive Current:
  • V_S = 4.5V
    • 200mA (All Channels On)
    • 410mA (Individual Channels)
• V_S = 3.6V
  • 100mA

Built-In Output Clamp Protects Against Inductive Kickback

+2.7V to +5.5V Logic Supply Voltage

Active-Low RESET Input Turns Off All Outputs Simultaneously

Built-in Power-On Reset

Automotive Temperature Range (-40°C to +125°C)

SPI-/QSPI-/MICROWIRE-Compatible Serial Interface

Serial Digital Output for Daisy Chaining and Diagnostics

FLAG Output for µP Interrupt

Open-Load and Short-Circuit Detection and Protection

Thermal Shutdown

Low 100µA (max) Quiescent Supply Current

Space-Saving, 5mm x 5mm, 20-Pin TQFN Package