SMS1242
PIN NAMES
Pin
Signal
Function
PIN CONFIGURATION
8-Pin SOIC
1
Active low output with weak pullup.
Driven low by: V
SENSE
below thresh-
old; or V
CC
below threshold while
RESET1#
MR# is below threshold. Remains
low for 150ms after V
SENSE
, or V
CC
and MR#, is above threshold.
RESET2#
V
SENSE
GND
Same as Reset1#, except open
drain connection
Threshold detector input for the
Resets
Ground
RESET1#
RESET2#
V
SENSE
GND
1
2
3
4
8
7
6
5
V
CC
MR#
SCL
SDA
2
3
4
5
6
7
8
2038 T PCon 2.0
SDA/GND SMS1243 Data I/O, or ground
SCL/GND SMS1243 Data Clock, or ground
MR#
V
CC
Manual input for Resets
Supply voltage
2038 Pin Table 2.0
V
CC
V
RST
V
RST
t
RST
RESET#
MR#
V
IL
t
MR
V
IH
t
RST
t
RST
V
SENSE
Figure 1. Reset Waveforms
V
SNS
2038 T Fig01 2.0
2038 2.0 6/8/00
SUMMIT MICROELECTRONICS, Inc.
3