STM6904SFEDS6F datasheet(5/21 Pages) STMICROELECTRONICS

номер детали	STM6904SFEDS6F

подробное описание детали	Quad, ultralow voltage supervisor with push-button reset

PDF	21 Pages

Scroll/Zoom	100%

производитель	STMICROELECTRONICS [STMicroelectronics]

домашняя страница	http://www.st.com

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STM6904

Description

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Description

The STM6904 supervisor is a low voltage/low supply current processor supervisor,

designed to monitor up to four system power supply voltages. This device is targeted at

applications such as Set-Top Boxes (STBs), portable, battery-powered systems, networking

and communication systems.

The device supports a push-button type manual reset input (MR). Two of the four supply

monitors (VCC and V2IN) have fixed (customer-selectable, factory-trimmed) thresholds

(VRST1 and VRST2). The other two voltage monitor inputs (V3IN and V4IN) are monitored

using externally adjustable threshold (0.600V internal reference) to meet specific level

requirements.

If any of the four monitored voltages drops below its factory-trimmed or adjustable

thresholds, or if the MR is asserted to logic low, the reset output RST is asserted (driven

low). Once asserted, RST is maintained Low for a minimum delay period (trec) after ALL

monitored supplies rise above their respective thresholds and MR returns to High. This

device is in the correct reset output logic state when VCC greater than 0.8V.

The STM6904 is available in a standard 8-lead MSOP (TSSOP) package.

Figure 1.

Logic diagram

Figure 2.

MSOP/TSSOP-8 connections

V4IN

VCC

STM6904

RST

VSS

TRSEL

V2IN

V3IN

ai13976

V3IN

VSS

V4IN

TRSEL

VCC

RST

V2IN

ai13977

STM6904SFEDS6F датащи(PDF) 5 Page - STMicroelectronics