AEC-Q100 (Grade3) Compliant For in-vehicle use Voltage detectors with watchdog function ON/OFF control pin and no need for external components XD6121 / XD6122 / XD6123 / XD6124 Series

Jul 25, 2017

Torex Semiconductor Ltd. (Tokyo Japan: President, Koji Shibamiya, 6616: 2nd section at Tokyo Stock Exchange) has enhanced the XD6121/XD6122/XD6123/XD6124 series of voltage detectors for in-vehicle applications. Featuring a watchdog function based on a CMOS process, these detectors achieve high accuracy and a low quiescent current.

The XD6121/XD6122/XD6123/XD6124 series newly launched by Torex outputs a signal with a delay time set by an internal delay circuit with no need for external components. The output type is L level on detection (VDFL).

In order to maintain device stability (redundancy) in in-vehicle applications, a single IC is often used instead of an internal microcontroller with a watchdog function or voltage detection function. With this product, there is no need for external components to set the delay time, and this provides a significant advantage for our customers in terms of lowering the quiescent current and space savings. In addition, the product complies with AEC-Q100 (Grade 3).

A watchdog ON/OFF function is incorporated, and the watchdog function can be turned OFF while maintaining the voltage detection function by setting the EN/ENB pin to L or H level. This contributes to further lowering of the quiescent current when the function is stopped.

The EN/ENB pin is internally pulled up to VIN or pulled down to VSS, and can be used in the OPEN state while the watchdog function is used. This helps the customer design redundancy.

The detected voltage can be set to 1.6V, 2.2V, 2.3V, 2.4V, 2.9V, 3.0V, 3.1V, 4.4V, 4.5V, or 4.6V by laser trimming. Six types are selectable from 50ms to 1.6s for the watchdog timeout time. Five types are selectable from 3.13ms to 400ms for the release delay time. The product is housed in the versatile SOT-25 package.

XD6121/XD6122/XD6123/XD6124 Series, SOT-25 (2.8 x 2.9 x h1.3mm)

XD6121/XD6122/XD6123/XD6124 Series Features

  • Low quiescent current, no need for external components to set delay time
  • Includes ON/OFF function
  • Watchdog timeout time: Six types selectable from 50ms to 1.6s
  • Release delay time: Five types selectable from 3.13ms to 400ms