S4242 Просмотр технического описания (PDF) - Summit Microelectronics

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производитель

S4242

Dual Voltage Supervisory Circuit With Watchdog Timer

Summit Microelectronics 

S4242/S42WD42/S4261/S42WD61

PIN CONFIGURATIONS

8-Pin PDIP

or 8-Pin SOIC

VLOW# 1

RESET# 2

VSENSE 3

GND 4

8 VCC

7 RESET

6 SCL

5 SDA

2025 T PCon 2.0

PB_RST#

PIN NAMES

Symbol

VLOW#

RESET#

VSENSE

GND

SDA

SCL

RESET

VCC

VCC = 3.0V or 5.0V

Pin

Description

1

Open drain output, active when

VSENSE < 1.24V

2 Active low I/O

3

2nd monitor voltage input.VLOW#

output when < 1.24V

4 Analog & digital ground

5 Serial memory I/O data line

6 Serial memory clock

7 Active high I/O

8 Supply voltage

VBAT TO

REGULATOR

VBAT

TRIP

S42xxx

VLOW#

RESET#

VSENSE

GND

VCC

RESET

SCL

SDA

I2C Peripheral

INTO (P1.5)

8051 Type

MCU

RST

SCL (P0.0)

SDA (P0.1)

RESET#

SCL

SDA

2025 T fig06 2.0

FIGURE 6. TYPICAL SYSTEM CONFIGURATION USING A PUSH BUTTON RESET AND BATTERY MONITOR CIRCUIT

SECOND CARD

VOLTAGE

3.0V ±5%

VCC = 5.0V ±10%

S42xxx

VLOW#

RESET#

VSENSE

GND

VCC

RESET

SCL

SDA

General

Purpose

MCU

SCL

SDA

I2C Peripheral

RESET#

RESET#

SCL

SDA

2025 T fig07 2.0

FIGURE 7. TYPICAL SYSTEM CONFIGURATION FOR DUAL RESET WITH VCC MONITOR AND 3.3VOLT MONITOR

2025 6.0 4/17/00

6

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