SMS1242 Просмотр технического описания (PDF) - Summit Microelectronics

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SMS1242

2.5V, 3V, 3.3V & 5V Dual Voltage, Dual Reset Microprocessor Supervisory Circuits

Summit Microelectronics 

SMS1242

PIN NAMES

PIN CONFIGURATION

Pin Signal

Function

Active low output with weak pullup.

Driven low by: VSENSE below thresh-

1

RESET1#

old; or VCC below threshold while

MR# is below threshold. Remains

low for 150ms after V , or V

SENSE

CC

and MR#, is above threshold.

2

RESET2#

Same as Reset1#, except open

drain connection

3

VSENSE

Threshold detector input for the

Resets

4

GND Ground

5 SDA/GND SMS1243 Data I/O, or ground

6 SCL/GND SMS1243 Data Clock, or ground

7

MR# Manual input for Resets

8

VCC Supply voltage

2038 Pin Table 2.0

8-Pin SOIC

RESET1# 1

RESET2# 2

VSENSE 3

GND 4

8 VCC

7 MR#

6 SCL

5 SDA

2038 T PCon 2.0

VCC

RESET#

VRST

VRST

tRST

MR#

VSENSE

VIL

VIH

tRST

tMR

VSNS

Figure 1. Reset Waveforms

tRST

2038 T Fig01 2.0

2038 2.0 6/8/00

SUMMIT MICROELECTRONICS, Inc.

3

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