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PDF STC634 Data sheet ( Hoja de datos )
| Número de pieza | STC634 | |
| Descripción | (STCxxx) UP Supervisor Circuits | |
| Fabricantes | ETC | |
| Logotipo |  |
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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
1 page  
Data Sheet
STC803/809/810-811/812/-823/824/825-6342/6343/6344/6345
µP Supervisor Circuits
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Pin Information
Pin Configuration
Figure 2. Pin Configuration
SOT23-3
STC803
STC809
1 GND
VCC 3
2 RESET
SOT23-5
STC811
1 GND VCC 5
2 NC
3 RESET MR 4
STC810
1 GND
VCC 3
2 RESET
STC812
1 GND VCC 5
2 NC
3 RESET MR 4
STC823
1 RESET VCC 5
2 GND
3 MR
WDI 4
SOT23-6
STC6342
STC6343
1 VCC RESET 6
2 GND
MR 5
3 PFI
PFO 4
STC824
1 RESET VCC 5
2 GND
3 RESET WDI 4
STC6344
1 VCC RESET 6
2 GND
MR 5
3 PFI
PFO 4
STC825
1 RESET VCC 5
2 GND
3 RESET MR 4
STC6345
1 VCC RESET 6
2 GND RESET 5
3 PFI
PFO 4
STC 5 Ver1.0
5 Page 
Data Sheet
STC803/809/810-811/812/-823/824/825-6342/6343/6344/6345
µP Supervisor Circuits
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Mechanical Information
Figure 5. SOT23-3
0.075
1.90
BSC
0.059 1.50 0.102 2.60
0.068 1.75 0.118 3.00
0037
0.95
BSC
0.014 0.35
0.019 0.50
0.110 2.80
0.118 3.00
Datum “A”
0.004 0.10
0.023 0.60
X.XX Denotes Dimensions
X.XX In Millimeters
0.057 1.45 MAX
SEATING
PLANE
0.000 0.00
0.005 0.15
Notes:
1)Controlling dimensions in millimeters
2)Ref: EIAJ SC-74A
3)Foot length is measured at flat portion of foot, reference to Datum A
0o - 10o
STC 11 Ver1.0
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet STC634.PDF ] | |
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