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 automotive (-40°C to +125°C) operating temperature ranges.
Key Features
Applications/Uses
Supports Up to 50V Continuous Drain-to-Source Voltage
Guaranteed Drive Current:
VS ≥ 4.5V
200mA (All Channels On)
410mA (Individual Channels)
VS ≤ 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
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