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STC634 Datasheet Preview

STC634 Datasheet

(STCxxx) UP Supervisor Circuits

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Data Sheet
STC803/809/810-811/812/-823/824/825-6342/6343/6344/6345
µP Supervisor Circuits
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Features
Introduction
• Precision supply-voltage monitor
- 4.63V (STC8xxL, STC634xL)
- 4.38V (STC8xxM, STC634xM)
- 3.08V (STC8xxT, STC634xT)
- 2.93V (STC8xxS, STC634xS)
- 2.63V (STC8xxR, STC634xR)
- 2.32V (STC8xxZ, STC634xZ)
- 2.20V (STC8xxY, STC634xY)
• 200ms reset pulse width
• Debounced CMOS-compatible manual-reset input
(811, 812, 823, 825, 6342-6344)
• Reset Output Signal for Watchdog and Power
Abnormal, Manual Reset
• Reset Push-Pull output (STC809,811,823,
824,825,6342,6345)
• Reset Open-Drain output (STC803/6343)
• Voltage monitor for power-fail or low battery warning
• Guaranteed RESET/RESET valid at VCC = 1.0V
The STCxxx family microprocessor (µP)
supervisory circuits are targeted to improve reliability
and accuracy of power-supply circuitry in µP systems.
These devices reduce the complexity and number of
components required to monitor power-supply and
battery functions.
The main functions are:
1. Asserting reset output during power-up, power-
down and brownout conditions for µP system;
2. Detecting power failure or low-battery conditions
with a 1.25V threshold detector;
3. Watchdog functions;
4. Manual reset.
Applications
• Power-supply circuitry in µP systems
Ordering Information
Part No.
1 STC803X
2 STC809X
3 STC810X
4 STC811X
5 STC812X
6 STC823X
7 STC824X
8 STC825X
9 STC6342X
10 STC6343X
11 STC6344X
12 STC6345X
RESET output
Push-Pull
-
-
-
-
-
Open-Drain
-
-
-
-
-
-
-
-
-
-
RESET
output
(push-pull)
-
-
-
-
-
-
Manual Reset
Input
-
-
-
-
-
Power Fail
Detector
(1.25V)
-
-
-
-
-
-
-
-
Watchdog
Input
-
-
-
-
-
-
-
-
-
-
Package
SOT23-3
SOT23-5
SOT23-6
Suffix: X -- Monitored Voltage
Suffix X
LM
T
S
R
Z
Y
Reset threshold (V) 4.63 4.38 3.08 2.93 2.63 2.32 2.20
STC 1 Ver1.0




ETC

STC634 Datasheet Preview

STC634 Datasheet

(STCxxx) UP Supervisor Circuits

No Preview Available !

Data Sheet
STC803/809/810-811/812/-823/824/825-6342/6343/6344/6345
µP Supervisor Circuits
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Contents
Features ....................................................................................................................................................... 1
Ordering Information .................................................................................................................................. 1
Introduction ................................................................................................................................................. 1
Block Diagram ............................................................................................................................................ 3
Marking Information ................................................................................................................................... 4
Pin Information ........................................................................................................................................... 5
Pin Configuration .............................................................................................................................. 5
Pin Description .................................................................................................................................. 6
Functional Description ................................................................................................................................ 7
Reset Output ...................................................................................................................................... 7
Watchdog Timer ................................................................................................................................ 7
Manual Reset ..................................................................................................................................... 7
Power-Fail Comparator ..................................................................................................................... 7
Recommended Operation Condition ................................................................................................. 8
Detailed Specifications ................................................................................................................................ 8
Absolute Maximum Ratings .............................................................................................................. 8
DC Electrical Characteristics ............................................................................................................. 9
AC Electrical Characteristics ........................................................................................................... 10
Mechanical Information ............................................................................................................................ 11
Notes ......................................................................................................................................................... 14
STC 2 Ver1.0


Part Number STC634
Description (STCxxx) UP Supervisor Circuits
Maker ETC
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STC634 Datasheet PDF






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