STMicroelectronics SR1 4-Pin Smart Reset™ Switch

STMicroelectronics SR1 4-Pin Smart Reset™ Switch is designed to ensure that inadvertent short reset push-button closures do not cause system resets. This is done by implementing an extended Smart Reset input delay time (t_SRC), which ensures a safe reset and eliminates the need for a specific dedicated reset button. The SR1 has one Smart Reset input (SR) with preset delayed Smart Reset setup time (t_SRC). The Reset Output (RST) is asserted after the Smart Reset input is held active for the selected t_SRC delay time. The RSToutput remains asserted either until the SRinput goes to inactive logic level or the output reset pulse duration is fixed for t_REC. The device fully operates over a broad V_CC range from 2.0V to 5.5V.

The STMicroelectronics SR1 Smart Reset Switch is offered in a 1.00mm x 1.45mm UDFN6 package.

Features

Operating voltage range 2.0V to 5.5V
Low supply current 1µA
Integrated test mode
Single Smart Reset push-button input with fixed extended reset setup delay (t_SRC) from 0.5s to 10s in 0.5s steps (typ.), option with internal input pull-up resistor
Push-button controlled reset pulse duration
- Option 1: Fully push-button controlled, no fixed or minimum pulse width guaranteed
- Option 2: Defined output reset pulse duration (t_REC), factory-programmed

Single reset output
- Active low or active high
- Push-pull or open drain with optional pull-up resistor
Fixed Smart Reset input logic voltage levels
Operating temperature: -40°C to +85°C
1.00mm x 1.45mm UDFN6 package
ECOPACK2 (RoHS compliant, Halogen-Free)