STM1001_05 [STMICROELECTRONICS]
Reset Circuit; 复位电路
| 型号： | STM1001_05 |
| 厂家： | 
ST |
| 描述： | Reset Circuit |
| 文件： | 总14页 (文件大小：244K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
STM1001
Reset Circuit
FEATURES SUMMARY
■
PRECISION MONITORING OF 3V, 3.3V, and
5V SUPPLY VOLTAGES
Figure 2. Package
■
■
■
■
OPEN DRAIN RST OUTPUT
140ms RESET PULSE WIDTH (min)
LOW SUPPLY CURRENT - 6µA (typ)
GUARANTEED RST ASSERTION DOWN TO
V
CC
= 1.0V
■
■
OPERATING TEMPERATURE:
–40°C to 85°C (Industrial Grade)
LEAD-FREE, SMALL SOT23 PACKAGE
SOT23-3 (WX)
Figure 1. Logic Diagram
Table 1. Signal Names
V
SS
Ground
V
CC
Active-Low RESET Output (Open
Drain)
RST
V
CC
Supply Voltage
STM1001
RST
Figure 3. SOT23-3 Connections
1
2
RST
V
3
SS
V
CC
V
SS
AI09116
AI09117
Rev 5.0
1/14
September 2005
STM1001
TABLE OF CONTENTS
FEATURES SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 1. Logic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2. Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 1. Signal Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 3. SOT23-3 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SUMMARY DESCRIPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 4. Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 5. Hardware Hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Reset Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Negative-Going V Transients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
CC
TYPICAL OPERATING CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 6. Supply Current vs. Temperature, L/M/R/S/T (no load) . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 7. Power-down Reset Delay vs. Temperature - V
Figure 8. Power-down Reset Delay vs. Temperature - V
= V – V (L/M). . . . . . . . . . . . . . . . 5
TH CC
OD
OD
= V – V (R/S/T) . . . . . . . . . . . . . . 6
TH
CC
Figure 9. Power-up t vs. Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
rec
Figure 10.Normalized Reset Threshold vs. Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 11.Max Transient Duration NOT Causing Reset Pulse vs. Reset Comparator Overdrive . . . 7
MAXIMUM RATING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 2. Absolute Maximum Ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
DC and AC PARAMETERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 3. Operating and AC Measurement Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 12.AC Testing Input/Output Waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 4. DC and AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
PACKAGE MECHANICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 13.SOT23-3 – 3-lead Small Outline Transistor Package Outline . . . . . . . . . . . . . . . . . . . . . 11
Table 5. SOT23-3 – 3-lead Small Outline Transistor Package Mechanical Data . . . . . . . . . . . . . 11
PART NUMBERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 6. Ordering Information Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 7. Marking Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
REVISION HISTORY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 8. Document Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2/14
STM1001
SUMMARY DESCRIPTION
The STM1001 MICROPROCESSOR RESET Cir-
cuit is a low-power supervisory device used to
monitor power supplies. It performs a single func-
supply voltage drops below a preset value and
keeping it asserted until V
has risen above the
CC
preset threshold for a minimum period of time
(t ).
tion: asserting a reset signal whenever the V
CC
rec
Figure 4. Block Diagram
VCC
VRST
COMPARE
trec
Generator
RST(1)
AI09118
Note: 1. Open Drain
Figure 5. Hardware Hookup
VCC
VCC
VCC
STM1001
RST(1)
(1)
MCU
RESET
Input
VSS
VSS
AI09119
Note: 1. RST output requires pull-up resistor.
3/14
STM1001
OPERATION
Reset Output
Negative-Going V Transients
CC
The STM1001 MICROPROCESSOR RESET
CIRCUIT asserts a reset signal to the MCU when-
The STM1001 is relatively immune to negative-go-
ing V
transients (glitches). Figure 11., page 7
CC
ever V
goes below the reset threshold (V
).
shows typical transient duration versus reset com-
parator overdrive (for which the STM1001 will
NOT generate a reset pulse). The graph was gen-
CC
RST
RST is guaranteed valid down to V = 1V (0° to
CC
70°C).
erated using a negative pulse applied to V
,
CC
During power-up, once V
threshold an internal timer keeps RST low for the
exceeds the reset
CC
starting at 0.5V above the actual reset threshold
and ending below it by the magnitude indicated
(comparator overdrive). The graph indicates the
reset time-out period, t . After this interval, RST
rec
returns high.
maximum pulse width a negative V
transient
CC
If V drops below the reset threshold, RST goes
CC
can have without causing a reset pulse. As the
magnitude of the transient increases (further be-
low the threshold), the maximum allowable pulse
width decreases. Any combination of duration and
overdrive which lies under the curve will NOT gen-
low. Each time RST is asserted, it stays low for at
least the reset time-out period. Any time V goes
below the reset threshold, the internal timer clears.
The reset timer starts when V returns above the
reset threshold. The active-low reset (RST) is an
open drain output.
CC
CC
erate a reset signal. Typically, a V transient that
CC
goes 100mV below the reset threshold and lasts
20µs or less will not cause a reset pulse. A 0.1µF
bypass capacitor mounted as close as possible to
the V pin provides additional transient immunity.
CC
4/14
STM1001
TYPICAL OPERATING CHARACTERISTICS
Note: Typical values are at T = 25°C, V = 5V for L/M versions, V = 3.3V for T/S versions, and V =
A
CC
CC
CC
3.0V for R versions.
Figure 6. Supply Current vs. Temperature, L/M/R/S/T (no load)
8.0
6.0
4.0
2.0
0.0
1V
3V
3.6V
5.5V
–40
–20
0
20
40
60
80
Temperature (˚C)
AI07879
Figure 7. Power-down Reset Delay vs. Temperature - V
= V – V (L/M)
TH CC
OD
140.00
120.00
100.00
80.00
60.00
40.00
20.00
0.00
VOD = 20mV
VOD = 125mV
VOD = 200mV
–40
–20
0
20
40
60
80
Temperature (˚C)
AI07880
5/14
STM1001
Figure 8. Power-down Reset Delay vs. Temperature - V
= V – V (R/S/T)
TH CC
OD
100.00
80.00
60.00
40.00
20.00
0.00
VOD = 20mV
VOD = 125mV
VOD = 200mV
–40
–20
0
20
40
60
80
Temperature (˚C)
AI07878
Figure 9. Power-up t
vs. Temperature
rec
250.00
240.00
230.00
220.00
210.00
200.00
L/M
R/S/T
–40
–20
0
20
40
60
80
Temperature (˚C)
AI07881
6/14
STM1001
Figure 10. Normalized Reset Threshold vs. Temperature
1.003
1.002
1.001
1.000
0.999
0.998
0.997
L/M
R/S/T
0.996
0.995
0.994
0.993
–40
–20
0
20
40
60
80
Temperature (˚C)
AI07882
Figure 11. Max Transient Duration NOT Causing Reset Pulse vs. Reset Comparator Overdrive
700.00
600.00
500.00
400.00
R/S/T
L/M
300.00
200.00
100.00
0.00
1
10
100
1000
Reset Comparator Overdrive, VRST – VCC (mV)
AI07883
7/14
STM1001
MAXIMUM RATING
Stressing the device above the rating listed in the
Absolute Maximum Ratings” table may cause per-
manent damage to the device. These are stress
ratings only and operation of the device at these or
any other conditions above those indicated in the
Operating sections of this specification is not im-
plied. Exposure to Absolute Maximum Rating con-
ditions for extended periods may affect device
reliability. Refer also to the STMicroelectronics
SURE Program and other relevant quality docu-
ments.
Table 2. Absolute Maximum Ratings
Symbol
Parameter
Value
Unit
T
Storage Temperature (V Off)
–55 to 150
°C
STG
CC
Lead Solder Temperature for 10 seconds
Input or Output Voltage
Supply Voltage
(1)
260
°C
V
T
SLD
V
–0.3 to V +0.3
IO
CC
V
–0.3 to 7.0
20
V
CC
I
O
Output Current
mA
mW
P
Power Dissipation
320
D
Note: 1. Reflow at peak temperature of 255°C to 260°C for < 30 seconds (total thermal budget not to exceed 180°C for between 90 to 150
seconds).
DC AND AC PARAMETERS
This section summarizes the operating measure-
ment conditions, and the DC and AC characteris-
tics of the device. The parameters in the DC and
AC characteristics Tables that follow, are derived
from tests performed under the Measurement
Conditions summarized in Table 3, Operating and
AC Measurement Conditions. Designers should
check that the operating conditions in their circuit
match the operating conditions when relying on
the quoted parameters.
Table 3. Operating and AC Measurement Conditions
Parameter
STM1001
1.0 to 5.5
–40 to 85
≤ 5
Unit
V
V
CC
Supply Voltage
Ambient Operating Temperature (T )
°C
ns
V
A
Input Rise and Fall Times
0.2 to 0.8V
Input Pulse Voltages
CC
0.3 to 0.7V
Input and Output Timing Ref. Voltages
V
CC
Figure 12. AC Testing Input/Output Waveforms
0.8V
CC
0.7V
CC
0.3V
CC
0.2V
CC
AI02568
8/14
STM1001
Table 4. DC and AC Characteristics
Alter-
(1)
Sym
Description
Min
Typ
Max
Unit
Test Condition
native
T = –40 to +85°C
1.2
1.0
5.5
5.5
10
V
V
A
V
Operating Voltage
CC
T = 0 to +70°C
A
V
V
< 3.6V
< 5.5V
5.5
7
µA
µA
CC
I
V
CC
Supply Current
CC
15
CC
V
> V
,
Open Drain Reset Output
Leakage Current
CC
RST
I
–1
+1
µA
V
LO
Reset not asserted
STM1001R/S/T only, I = 1.2mA
OL
0.3
V
= V
(min)
RST
CC
V
V
RST Output Low Voltage
OL
STM1001L/M only, I = 3.2mA
OL
0.4
0.3
V
V
V
= V
(min)
RST
CC
I
= 50µA; V > 1.0V
RST Output Low Voltage
OL
OL
CC
RESET Thresholds
25°C
4.56
4.50
4.31
4.25
3.04
3.00
2.89
2.85
2.59
2.55
4.63
4.38
3.08
2.93
2.63
4.70
4.75
4.45
4.50
3.11
3.15
2.96
3.00
2.66
2.70
V
V
V
V
V
V
V
V
V
V
STM1001L
STM1001M
STM1001T
STM1001S
STM1001R
–40 to 85°C
25°C
–40 to 85°C
25°C
V
RST
Reset Threshold
–40 to 85°C
25°C
–40 to 85°C
25°C
–40 to 85°C
V
Temperature
Coefficient
ppm/
C
RST
V
CC
= 3.3V
45
V
to (V
= V
STM1001L/M
40
20
µs
µs
CC
RST
–
V
CC
to RST Delay
RST
100mV)
STM1001R/S/T
t
RST Pulse Width
140
210
280
ms
rec
Note: 1. Valid for Ambient Operating Temperature: T = –40 to 85°C; V = 1.2V to 5.5V (except where noted).
A
CC
2. “Glitches” of 100ns or less typically will not generate a RESET pulse.
9/14
STM1001
PACKAGE MECHANICAL
In order to meet environmental requirements, ST offers these devices in ECOPACK packages. These
packages have a Lead-free second level interconnect. The category of second Level Interconnect is
marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97.
®
The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK
is an ST trademark. ECOPACK specifications are available at: www.st.com.
10/14
STM1001
Figure 13. SOT23-3 – 3-lead Small Outline Transistor Package Outline
E
E1
M
0.15
C A B
B
A1
1
e
e1
D
3X
M
0.20
C A B
0.10 C
C
A2
A
A
3X b
C
θ
C
L1
L
SOT23-3
Note: Drawing is not to scale.
Table 5. SOT23-3 – 3-lead Small Outline Transistor Package Mechanical Data
mm
Min
inches
Min
Symbol
Typ
Max
1.12
0.10
1.02
0.50
0.20
3.04
2.64
1.40
1.03
2.05
Typ
Max
A
A1
A2
b
0.89
0.01
0.88
0.30
0.08
2.80
2.10
1.20
0.89
1.78
0.035
0.001
0.035
0.012
0.003
0.110
0.083
0.047
0.035
0.070
0.044
0.004
0.042
0.020
0.008
0.120
0.104
0.055
0.041
0.081
C
D
E
E1
e
e1
L
0.54
0.021
L1
Θ
0.40
0°
0.60
8°
0.016
0°
0.024
8°
N
3
3
11/14
STM1001
PART NUMBERING
Table 6. Ordering Information Scheme
Example:
STM1001
L
WX
6
F
Device Type
STM1001
Reset Threshold Voltage
L = V
= 4.50V to 4.75V
= 4.25V to 4.50V
= 3.00V to 3.15V
= 2.85V to 3.00V
= 2.55V to 2.70V
RST
M = V
RST
RST
RST
RST
T = V
S = V
R = V
Package
WX = SOT23-3
Temperature Range
6 = –40 to 85°C
Shipping Method
F = ECOPACK Package, Tape & Reel
For other options, or for more information on any aspect of this device, please contact the ST Sales Office
nearest you.
Table 7. Marking Description
(1)
Part Number
Reset Threshold
Output
Topside Marking
8BAx
STM1001L
STM1001M
STM1001T
STM1001S
STM1001R
4.63V
4.38V
3.08V
2.93V
2.63V
Open Drain RST
Open Drain RST
Open Drain RST
Open Drain RST
Open Drain RST
8BBx
8BCx
8BDx
8BEx
Note: 1. Lowercase “x” indicates date code.
12/14
STM1001
REVISION HISTORY
Table 8. Document Revision History
Date
Version
1.0
Revision Details
09-Dec-03
19-Feb-04
22-Mar-04
09-Apr-04
19-Nov-04
19-Sep-05
First Edition
2.0
Part number changed from STM6301
Update DC Characteristics (Table 4)
2.1
3.0
Device promoted; reformatted; marking updated (Table 7)
Update dimensions (Table 5)
4.0
Remove “Valid RST Output Down to V ...” text
5.0
CC
13/14
STM1001
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics.
All other names are the property of their respective owners
© 2005 STMicroelectronics - All rights reserved
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14/14
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