STC809 ETC-unknow, STC809 Datasheet

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STC809

Manufacturer Part Number
STC809
Description
Up Supervisor Circuits
Manufacturer
ETC-unknow
Datasheet
1.STC809.pdf (13 pages)

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--------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Features
• Precision supply-voltage monitor
• 200ms reset pulse width
• Debounced CMOS-compatible manual-reset input
• Reset Output Signal for Watchdog and Power
• Reset Push-Pull output (STC809,811,823,
• Reset Open-Drain output (STC803/6343)
• Voltage monitor for power-fail or low battery warning
• Guaranteed RESET/RESET valid at V
Ordering Information
STC
Suffix: X -- Monitored Voltage
10
11
12
1
2
3
4
5
6
7
8
9
- 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)
(811, 812, 823, 825, 6342-6344)
Abnormal, Manual Reset
824,825,6342,6345)
Reset threshold (V)
STC803X
STC809X
STC810X
STC811X
STC812X
STC823X
STC824X
STC825X
STC6342X
STC6343X
STC6344X
STC6345X
Part No.
Suffix X
Push-Pull
-
-
-
-
-
RESET output
STC803/809/810-811/812/-823/824/825-6342/6343/6344/6345
4.63
L
Open-Drain
-
-
-
-
-
-
-
-
-
-
4.38
M
CC
= 1.0V
(push-pull)
RESET
-
-
-
-
output
-
-
3.08
T
1
Introduction
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
Manual Reset
-
-
-
-
-
Input
2.93
S
Power Fail
Detector
(1.25V)
-
-
-
-
-
-
-
-
2.63
R
P Supervisor Circuits
Watchdog
2.32
-
-
-
-
-
-
-
-
-
-
Z
Input
Data Sheet
Ver1.0
SOT23-3
SOT23-5
SOT23-6
Package
2.20
Y

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STC809 Summary of contents

Page 1

... 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 V ...

Page 2

STC803/809/810-811/812/-823/824/825-6342/6343/6344/6345 -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 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 ...

Page 3

STC803/809/810-811/812/-823/824/825-6342/6343/6344/6345 -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Block Diagram Figure 1. Block Diagram WDI Transition Detector MR Vcc PFI STC Watchdog Watchdog Timer V cc Timebase for Reset & Watchdog Reset Generator V RST 1.25V 3 Data Sheet P Supervisor Circuits RESET (RESET) PFO Ver1.0 ...

Page 4

... STC803/809/810-811/812/-823/824/825-6342/6343/6344/6345 -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Marking Information Part Number Code Code 1 2 Part No. AA STC809L AB STC809M AC STC809T AD STC809S AE STC809R AF STC809Z AG STC809Y AH STC810L AI STC810M AJ STC810T AK STC810S AL STC810R AM STC810Z AN STC810Y AO STC811L AP STC811M AQ STC811T AR STC811S AS STC811R AT STC811Z AU STC811Y AV STC812L AW STC812M AX STC812T AY STC812S AZ STC812R BA STC812Z BB STC812Y ...

Page 5

STC803/809/810-811/812/-823/824/825-6342/6343/6344/6345 -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pin Information Pin Configuration Figure 2. Pin Configuration ...

Page 6

STC803/809/810-811/812/-823/824/825-6342/6343/6344/6345 -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pin Description Table 2. Pin Description ...

Page 7

STC803/809/810-811/812/-823/824/825-6342/6343/6344/6345 -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Functional Description Reset Output A microprocessor’s (µP’s) reset input starts the µ known state. Whenever the µ unknown state, it should be held in reset. The supervisory circuits assert reset during power- up ...

Page 8

STC803/809/810-811/812/-823/824/825-6342/6343/6344/6345 -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Detailed Specifications Absolute Maximum Ratings Storage Temperature ....................................................... -65 Ambient Temperature with Power Applied ....................... -40 Supply Voltage to Ground Potential (Vcc to GND) ........... -0.3V to +7.0V DC Input Voltage (All inputs except Vcc and GND) ..... ...

Page 9

STC803/809/810-811/812/-823/824/825-6342/6343/6344/6345 -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- DC Electrical Characteristics Table 4. DC Electrical Characteristics (Vcc=V +5% to 5.5V -40~85”C, unless otherwise noted Symbol Description V Operating Voltage Range CC I Supply Current CC V Input High Voltage IH V Input ...

Page 10

STC803/809/810-811/812/-823/824/825-6342/6343/6344/6345 -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- AC Electrical Characteristics Table 5. AC Electrical Characteristics ...

Page 11

STC803/809/810-811/812/-823/824/825-6342/6343/6344/6345 -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Mechanical Information Figure 5. SOT23-3 0.075 1.90 BSC 0037 0.95 0.014 0.35 BSC 0.019 0.50 0.110 2.80 0.118 3.00 X.XX Denotes Dimensions X.XX In Millimeters Notes: 1)Controlling dimensions in millimeters 2)Ref: EIAJ SC-74A 3)Foot length is measured at ...

Page 12

STC803/809/810-811/812/-823/824/825-6342/6343/6344/6345 -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Figure 6. SOT23-5 0.075 1.90 BSC 0037 0.95 0.014 0.35 BSC 0.019 0.50 0.110 2.80 0.118 3.00 X.XX Denotes Dimensions X.XX In Millimeters Notes: 1)Controlling dimensions in millimeters 2)Ref: EIAJ SC-74A 3)Foot length is measured at flat portion ...

Page 13

STC803/809/810-811/812/-823/824/825-6342/6343/6344/6345 -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Figure 7. SOT23-6 0.075 1.90 BSC 0037 0.95 0.014 0.35 BSC 0.019 0.50 0.110 2.80 0.118 3.00 X.XX Denotes Dimensions X.XX In Millimeters Notes: 1)Controlling dimensions in millimeters 2)Ref: EIAJ SC-74A 3)Foot length is measured at flat portion ...

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