DS1233M-3
EconoReset

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Datasheet

Size: 35.22KB
Page: 4
PDF: DS1233M-3.pdf
  • Description:
    EconoReset
  • MFG:
    DALLAS [Dallas Semiconducotr]
 

Abstract


DS1233M
EconoReset
DS1233M
022698 1/4
FEATURES
? Automatically restarts microprocessor after power
failure
? Maintains reset for 350 ms after V
CC
returns to an
in-tolerance condition
? Reduces need for discrete components
? Precision temperature-compensated voltage refer-
ence and voltage sensor
? Low-cost TO-92 package or surface mount 8–pin
SOIC packages available
? Internal 5 K? pull-up resistor
? Compatible with Motorola 68XXX series and HC16
Microprocessors
? Pin function compatible with the Motorola MC33064,
MC34064, MC33164, and MC34164
? Operating temperature of –40°C to +85°C
PIN ASSIGNMENT
DALLAS
12 3
123
DS1233
Econo
Reset
DS1233M
TO-92 Package
See Mech. Drawings
Section
8
7
6
5
1
2
3
4
RST
V
CC
NC
GND
NC
NC
NC
NC
DS1233M 8–PIN SOIC
(150 MIL)
See Mech. Drawings
Section
PIN DESCRIPTIONS
TO–92
1 RST – Active Low Reset Output
2V
CC
– Power Supply
3 GND – Ground
8–Pin SOIC
RST – Active Low Reset Output
V
CC
– Power Supply
NC – No Connect
GND – Ground
DESCRIPTION
The DS1233M EconoReset uses a precision tempera-
ture compensated reference and comparator circuit to
monitor the status of the power supply (V
CC
). When an
out-of-tolerance condition is detected, an internal power
fail signal is generated which forces reset to the active
(low) state. When V
CC
returns to an in-tolerance condi-
tion, the reset signal is kept in the active state for ap-
proximately 350 ms to allow the power supply and pro-
cessor to stabilize.

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