STM1817TWX7F [STMICROELECTRONICS]
Low Power Reset Circuit; 低功耗复位电路
| 型号： | STM1817TWX7F |
| 厂家： | 
ST |
| 描述： | Low Power Reset Circuit |
| 文件： | 总20页 (文件大小：323K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
STM1810, STM1811, STM1812, STM1813
STM1815, STM1816, STM1817, STM1818
Low Power Reset Circuit
PRELIMINARY DATA
FEATURES SUMMARY
■
PRECISION MONITORING OF 3V, 3.3V,
AND 5V SUPPLY VOLTAGES
Figure 1. Packages
■
FOUR OUTPUT CONFIGURATIONS
–
–
–
–
Push-Pull, Active-High (STM1812,1817)
Push-Pull, Active-Low (STM1810,1815)
Open Drain, Active-Low (STM1811,1816)
Open Drain, Active-Low with Push-Button
Detect (STM1813,1818)
■
■
■
RESET PULSE WIDTH - 100ms (min)
LOW SUPPLY CURRENT - 4uA (typ)
GUARANTEED ASSERTION DOWN TO
V
CC
= 1.0V (0°C to 105°C)
■
FACTORY-TRIMMED RESET
THRESHOLDS OF 2.55V, 2.88V, 3.06V,
4.37V, and 4.62V (typ)
SOT23-3 (WX)
■
■
POWER SUPPLY TRANSIENT IMMUNITY
PUSH-BUTTON/MANUAL RESET DETECT
(STM1813/1818)
■
■
OPERATING TEMPERATURE:
–40°C TO 105°C
±2.5% RESET THRESHOLD ACCURACY
(–40°C TO 105°C)
■
■
AVAILABLE IN THE SOT23-3 PACKAGE
FULLY COMPATIBLE WITH DS181x AND
MXD181x PRODUCTS
Table 1. Device Options
Active-Low
RESET
(Push-Pull)
Active-Low
RESET
(Open Drain)
Active-High
RESET
(Push-Pull)
Active-Low RESET
(Open Drain,
Bi-directional, with MR Detect)
3.3V/
3.0V
5V
STM1810L/M
STM1811L/M
STM1812L/M
STM1813L/M
STM1815T/S/R
STM1816T/S/R
STM1817T/S/R
STM1818T/S/R
■
■
■
■
■
(1)
■
■
■
■
■
■
■
■
■
■
(1)
■
Note: 1. Active-low RST with internal pull-up resistor
Rev 5
1/20
June 2005
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
STM1810/1811/1812/1813/1815/1816/1817/1818
TABLE OF CONTENTS
FEATURES SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 1. Packages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 1. Device Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SUMMARY DESCRIPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 2. Logic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Table 2. Signal Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 3. SOT23-3 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 4. Hardware Hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
FUNCTIONAL BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 5. Push-pull Active-Low Output (STM1810/1812/1815/1817) . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 6. Open Drain, Active-Low Output (STM1811/1816). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 7. Open Drain, Active-Low Output (Bi-directional, Manual Reset Detect, STM1813/1818). . 5
PIN DESCRIPTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 3. STM1810/STM1815. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 4. STM1811/STM1816. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 5. STM1812/STM1817. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 6. STM1813/STM1818. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Reset Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Push-Button Detect Reset (STM1813/1818) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Interfacing to Bidirectional Microcontrollers (MCU’s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Negative Going V Transients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
CC
Valid RST Output Down to V = 0V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
CC
Figure 8. Reset Timing Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 9. Push-Button Manual Reset with MR Detect (STM1813/1818) . . . . . . . . . . . . . . . . . . . . . 8
Figure 10.Manual Reset Timing Diagram, Switch Bounce/Debounce (STM1813/1818). . . . . . . . . . 8
Figure 11.Interfacing MCUs with Bi-Directional Reset Pins (RST, Open Drain, STM1811/1816). . . 8
Figure 12.Valid Reset (RST) Output Down to V = 0V (Push-pull) . . . . . . . . . . . . . . . . . . . . . . . . . 9
CC
Figure 13.Valid Reset (RST) Output Down to V = 0V (Push-pull) . . . . . . . . . . . . . . . . . . . . . . . . . 9
CC
TYPICAL OPERATING CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 14.Supply Current vs. Temperature (no load) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 15.Normalized Reset Time-out Period (t ) vs. Temperature - V
= V – V
. . . . . . . 10
CC
rec
OD
TH
Figure 16.V -to-Reset Output Delay vs. Temperature - V
= V – V
. . . . . . . . . . . . . . . . . 11
CC
CC
OD
TH
Figure 17.Voltage Output Low vs. I
Figure 18.Voltage Output High vs. I
SINK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
SOURCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 19.Normalized Reset Threshold vs. Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 20.Max Transient Duration NOT Causing Reset Pulse vs. Reset Threshold Overdrive . . . 13
2/20
STM1810/1811/1812/1813/1815/1816/1817/1818
MAXIMUM RATING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 7. Absolute Maximum Ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
DC AND AC PARAMETERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 8. Operating and AC Measurement Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 21.AC Testing Input/Output Waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 9. DC and AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
PACKAGE MECHANICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 22.SOT23-3 – 3-lead Small Outline Transistor Package Outline . . . . . . . . . . . . . . . . . . . . . 16
Table 10. SOT23-3 – 3-lead Small Outline Transistor Package Mechanical Data . . . . . . . . . . . . . 16
PART NUMBERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 11. Ordering Information Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 12. Marking Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
REVISION HISTORY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 13. Document Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3/20
reset signal whenever V
below a preset value and keeping it asserted until
supply voltage drops
ternal pull-up resistor to V . The STM1813 and
CC
CC
STM1818 feature a debounced manual reset fea-
ture that asserts a reset if the RST pin is pulled low
for more than 1.5µs. When used to initiate manual
reset, RST debounces signals from devices such
as mechanical switches. For devices with this fea-
ture, the release of the external switch triggers the
reset period.
V
has risen above the preset threshold for a
CC
minimum period of time (t ). They provide excel-
rec
lent circuit reliability without additional external
components when used with +3.0V/+3.3V
(STM1815–STM1818), and +5V (STM1810–
STM1813) power supply systems.
A precision voltage reference and comparator
The STM181x devices are guaranteed to output
monitors the V input for an out-of-tolerance con-
the correct logic state for V
down to 1.0V (0°C
CC
CC
dition. When an invalid V
reset output (RST) is forced low (or high in the
case of RST) and remains asserted for t after
condition occurs, the
to +105°C). They also provide a reset comparator
designed to ignore fast transients on V
CC
.
CC
rec
Reset thresholds are available between +2.55V
and +4.62V These small, low power devices are
ideal for use in portable equipment. All are avail-
able in the space-saving 3-pin SOT23 package,
and are specified from –40°C to +105°C. Figure
4., page 5 shows a typical hardware hookup for
STM181x devices to a Microcontroller.
V
rises above the reset threshold. The
CC
STM1813/1818 also keep reset asserted for t
after the output is momentarily pulled to ground by
an external push-button switch.
The STM1812 and STM1817 have an active-high,
push-pull output. The STM1810 and STM1815
(push-pull) and STM1811, STM1813, STM1816,
rec
Figure 2. Logic Diagram
Table 2. Signal Names
V
Ground
SS
V
CC
RST
RST
Active-low Reset Output
Active-high Reset Output
(1)
Supply Voltage and Input for Reset
Threshold Monitor
V
CC
(1)
STM181x
RST (RST)
Note: 1. For STM1812, STM1817
Figure 3. SOT23-3 Connections
1
2
RST (RST)
V
3
SS
V
SS
V
AI09648
CC
AI09649
Note: 1. For STM1812, STM1817
Note: RST for STM1812 and STM1817
4/20
STM1810/1811/1812/1813/1815/1816/1817/1818
Figure 4. Hardware Hookup
VCC
VCC
MCU
VCC
STM181x
RST(1)
RESET
Input
Push-button
RESET(2)
VSS
VSS
AI09652a
Note: 1. RST for STM1812 and STM1817 (see Table 1., Device Options)
2. Only valid for STM1813 and STM1818.
FUNCTIONAL BLOCK DIAGRAMS
Figure 5. Push-pull Active-Low Output (STM1810/1812/1815/1817)
VCC
t
RST(1)
rec
VRST
COMPARE
Generator
AI09651a
Note: 1. RST for STM1812 and STM1817.
Figure 6. Open Drain, Active-Low Output (STM1811/1816)
5.5kΩ(1)
VCC
t
rec
VRST
COMPARE
RST
Generator
AI09672
Note: 1. 5.5kΩ internal pull-up resistor
Figure 7. Open Drain, Active-Low Output (Bi-directional, Manual Reset Detect, STM1813/1818)
5.5kΩ(1)
Push-button
Detect
RST
VCC
t
rec
VRST
COMPARE
Generator
AI09673
Note: 1. 5.5kΩ internal pull-up resistor
5/20
STM1810/1811/1812/1813/1815/1816/1817/1818
PIN DESCRIPTIONS
See Figure 2., Logic Diagram and Table 2., Signal
Active-high RST Output (Push-pull). Pulses
Names for a brief overview of the signals connect-
ed to this device.
high when V drops below V , and stays high
CC
RST
as long as V
is below the reset threshold. It re-
CC
mains high for t after V rises above the reset
threshold.
rec
CC
Active-Low RST Output (Push-pull). Pulses
low when V drops below V
, and stays low as
CC
RST
long as V
mains low for t after V
is below the reset threshold. It re-
Active-Low RST Output (Open Drain with inter-
nal 5.5kΩ pull-up) with Manual Reset Detect.
CC
rises above the reset
rec
CC
threshold.
Pulses low when V
drops below V
, or RST
RST
CC
Active-Low RST Output (Open Drain). Pulses
low when V drops below V , and stays low as
is externally pulled low for at least 1.5µs. It re-
mains low for t after V rises above the re-
set threshold, or after the external manual reset is
released (see Figure 10., page 8). RST output has
an internal 5.5kΩ pull-up resistor.
CC
RST
PBRST
CC
long as V
mains low for t after V
is below the reset threshold. It re-
CC
rises above the reset
rec
CC
threshold. RST output has an internal 5.5kΩ pull-
up resistor.
V
. Supply voltage and input for V
compara-
RST
CC
tor.
V
. Ground, is the reference for the power sup-
SS
ply. It must be connected to the system ground.
Table 3. STM1810/STM1815
Pin
1
Name
Function
RST
Active-low Reset Output (Push-pull)
V
2
Supply Voltage and Input for Reset Threshold Monitor
Ground
CC
V
3
SS
Table 4. STM1811/STM1816
Pin
1
Name
Function
Active-low Reset Output (Open Drain, with internal 5.5kΩ pull-up resistor)
Supply Voltage and Input for Reset Threshold Monitor
Ground
RST
V
CC
2
V
3
SS
Table 5. STM1812/STM1817
Pin
1
Name
Function
RST
Active-high Reset Output (Push-pull)
V
2
Supply Voltage and Input for Reset Threshold Monitor
Ground
CC
V
3
SS
Table 6. STM1813/STM1818
Pin
Name
Function
Active-low Reset Output (Open Drain, with internal 5.5kΩ pull-up) with Push-Button/Manual
Reset Detect
1
RST
V
2
3
Supply Voltage and Input for Reset Threshold Monitor
Ground
CC
V
SS
6/20
STM1810/1811/1812/1813/1815/1816/1817/1818
OPERATION
Reset Output
The STM181x asserts a reset signal to the Micro-
ing the µP supervisor’s reset (RST) output directly
controller (MCU) whenever V
goes below the
to the microcontroller’s reset (RST) pin allows ei-
ther device to assert reset (Figure 11., page 8). No
external pull-up resistor is required, as it is within
the STM1811/STM1816.
CC
reset threshold (V
), and is guaranteed valid
RST
down to V = 1.0V (0° to 105°C). A microcontrol-
CC
ler’s (MCU) reset input starts the MCU in a known
state. The STM1810 - STM1813/ STM1815 -
STM1818 Low Power Reset circuits assert reset to
prevent code-execution errors during power-up,
power-down, and brownout conditions (Figure
8., page 7).
Negative Going V Transients
CC
The STM181x are relatively immune to negative-
going
V
transients
(glitches).
Figure
CC
20., page 13 shows typical transient duration ver-
sus reset comparator overdrive (for which the
STM181x will NOT generate a reset pulse). The
graph was generated using a negative pulse ap-
During power-up, once V
exceeds the reset
CC
threshold an internal timer keeps RST low for the
reset time-out period, t . After this interval, RST
rec
plied to V
starting at 0.5V above the actual re-
CC,
returns high.
set threshold and ending below it by the
magnitude indicated (comparator overdrive). The
graph indicates the maximum pulse width a nega-
If V drops below the reset threshold, RST goes
CC
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.
tive V
transient can have without causing a re-
CC
CC
set pulse. As the magnitude of the transient
increases (further below the threshold), the maxi-
mum allowable pulse width decreases. Any com-
bination of duration and overdrive which lies under
the curve will NOT generate a reset signal. Typi-
The reset timer starts when V returns above the
CC
reset threshold. Reset t is also triggered by an
rec
externally initiated rising edge on the RST pin
(STM1813/STM1818), following a low signal of
1.5µs minimum duration.
cally, a V
transient that goes 100mV below the
CC
reset threshold and lasts 20µs or less will not
cause a reset pulse. A 0.1µF bypass capacitor
Push-Button Detect Reset (STM1813/1818)
Many systems require push-button reset capability
(Figure 9., page 8), allowing the user or external
logic circuitry to initiate reset. On the STM1813/
STM1818, a logic low on RST held for greater than
1.5µs asserts a reset. RST deasserts following a
mounted as close as possible to the V
vides additional transient immunity.
pin pro-
CC
Valid RST Output Down to V = 0V
CC
When V falls below 1V, the RST output no long-
CC
100ms minimum reset time-out delay (t ). A
er sinks current, but becomes an open circuit. In
most systems this is not a problem, as most MCUs
do not operate below 1V. However, in applications
where RST output must be valid down to 0V, a
pull-down resistor may be added to hold the RST
output low (see Figure 12., page 9). This resistor
must be large enough to not load the RST output,
and still be small enough to pull the output to
ground. A 100kΩ resistor is recommended.
rec
manual reset input shorter than 1.5µs may release
RST without the 100ms minimum reset time-out
delay. To facilitate use with mechanical switches,
the STM1813/STM1818 contain internal de-
bounce circuitry. A debounced waveform is shown
in Figure 10., page 8 The RST output has an inter-
nal 5.5kΩ pull-up resistor.
Interfacing to Bidirectional Microcontrollers
(MCU’s)
As the RST output on the STM1811/STM1816 is
open drain, these devices interface easily with
MCU’s that have bidirectional reset pins. Connect-
Note: The same situation applies for the active-
high RST of the STM1810/1812. A 100kΩ pull-up
resistor to V should be used if RST must remain
CC
valid for V < 1.0V.
CC
Figure 8. Reset Timing Diagram
V
CC
V
RST
V
(min)
CC
t
t
RST
rec
rec
RST(1)
AI09653
Note: 1. RST for STM1812 and STM1817
7/20
STM1810/1811/1812/1813/1815/1816/1817/1818
Figure 9. Push-Button Manual Reset with MR Detect (STM1813/1818)
VCC
VCC
STM1813
STM1818
5.5kΩ
Reset
Monitor
Micro RESET
RST
Push-button RESET
VSS
AI09654
Figure 10. Manual Reset Timing Diagram, Switch Bounce/Debounce (STM1813/1818)
V
CC
tPBRST
tPBRST
(Open)
Switch Bounce
(Closed)
External
Push-button
RST
AI09655
Figure 11. Interfacing MCUs with Bi-Directional Reset Pins (RST, Open Drain, STM1811/1816)
VCC
VCC
STM1811
STM1816
VCC
5.5kΩ
MCU
RST
Input
RST
VSS
VSS
AI09656
8/20
STM1810/1811/1812/1813/1815/1816/1817/1818
Figure 12. Valid Reset (RST) Output Down to V = 0V (Push-pull)
CC
VCC
VCC
STM1810
STM1815
VCC
MCU
RST
Input
RST
(1)
RP
VSS
VSS
AI09657
Note: 1. ~100 kΩ resistor recommended.
Figure 13. Valid Reset (RST) Output Down to V = 0V (Push-pull)
CC
VCC
VCC
STM1812
STM1817
VCC
(1)
RP
MCU
RST
RST
Input
VSS
VSS
AI09658
Note: 1. ~100 kΩ resistor recommended.
9/20
STM1810/1811/1812/1813/1815/1816/1817/1818
TYPICAL OPERATING CHARACTERISTICS
Note: Typical values are at T = 25°C.
A
Figure 14. Supply Current vs. Temperature (no load)
5
4
3
2
1
0
V
V
V
= 1.8V
= 3V
CC
CC
CC
= 5V
–40
–20
0
20
40
60
80
100
Temperature (˚C)
AI10402
Figure 15. Normalized Reset Time-out Period (t ) vs. Temperature - V = V – V
CC
rec
OD
TH
1.07
1.05
1.03
1.01
0.99
–40
–20
0
20
40
60
80
100
Temperature (°C)
AI10403
10/20
STM1810/1811/1812/1813/1815/1816/1817/1818
Figure 16. V -to-Reset Output Delay vs. Temperature - V
= V – V
CC
CC
OD
TH
3.0
2.5
2.0
1.5
1.0
0.5
0.0
–40
–20
0
20
40
60
80
100
Temperature (°C)
AI10404
Figure 17. Voltage Output Low vs. I
SINK
0.10
0.08
0.06
0.04
0.02
0.00
V
= 3V
CC
0
1
2
3
4
5
6
I
(mA)
SINK
AI10406
11/20
STM1810/1811/1812/1813/1815/1816/1817/1818
Figure 18. Voltage Output High vs. I
SOURCE
1.20
1.00
0.80
0.60
0.40
0.20
0.00
V
= 3V
CC
0.0
1.0
2.0
3.0
4.0
5.0
6.0
I
(mA)
SOURCE
AI10407
Figure 19. Normalized Reset Threshold vs. Temperature
1.010
1.005
1.000
0.995
0.990
–40
–20
0
20
40
60
80
100
Temperature (°C)
AI10405
12/20
STM1810/1811/1812/1813/1815/1816/1817/1818
Figure 20. Max Transient Duration NOT Causing Reset Pulse vs. Reset Threshold Overdrive
30
25
20
15
10
5
0
10
100
1000
Reset Threshold Overdrive (mV)
AI10408
Note: Reset occurs above the line.
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STM1810/1811/1812/1813/1815/1816/1817/1818
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 7. Absolute Maximum Ratings
Symbol
Parameter
Value
Unit
T
Storage Temperature (V Off)
–55 to 150
°C
STG
CC
(1)
Lead Solder Temperature for 10 seconds
Input or Output Voltage
Supply Voltage
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 8, 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 8. Operating and AC Measurement Conditions
Parameter
STM1810 - 1818
1.0 to 5.5
–40 to 105
≤ 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 21. AC Testing Input/Output Waveforms
0.8V
CC
0.7V
CC
0.3V
CC
0.2V
CC
AI02568
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STM1810/1811/1812/1813/1815/1816/1817/1818
Table 9. DC and AC Characteristics
Alter-
(1)
Sym
Description
Min
Typ
Max
Unit
Test Condition
native
T = 0 to +105°C
1.0
1.2
5.5
5.5
10
V
V
A
V
Operating Voltage
CC
T = –40 to +105°C
A
V
V
= 3.6V, No load
= 5.5V, No load
4
9
µA
µA
V
CC
CC
I
V
CC
Supply Current
CC
16
V
0.7V
Input High Voltage
Input Low Voltage
STM1813/1818 only
STM1813/1818 only
IH
CC
V
0.4
V
IL
V
0.5
–
V
CC
– 0.1
CC
V
Output High Voltage
0 < I < 500µA
V
OH
OH
OH
V
≥ V
(max), Reset not
CC
RST
RST Output Source Current
RST Output Source Current
350
µA
µA
asserted (STM1810/STM1815)
I
V
≤ V (min), Reset asserted
CC
RST
350
(STM1812/STM1817)
V
CC
≥ 2.7V, Reset asserted,
RST Output Sink Current
RST Output Sink Current
V
= 0.4V (STM1810/1811/
1813/1815/1816/1818)
10
10
mA
OUT
I
OL
V
≥ 2.7V, Reset not asserted,
= 0.4V, (STM1812/1817)
CC
mA
pF
V
OUT
(2)
C
10
OUT
Output Capacitance
Reset Thresholds
25°C
4.62
4.37
3.06
2.88
2.55
V
V
V
V
V
V
V
V
V
V
STM181xL
STM181xM
STM181xT
STM181xS
STM181xR
–40 to 105°C
25°C
4.50
4.25
2.98
2.80
2.47
4.75
4.49
3.15
2.97
–40 to 105°C
25°C
V
RST
Reset Threshold
–40 to 105°C
25°C
–40 to 105°C
25°C
–40 to 105°C
2.64
5
V
CC
= (V + 100mV) falling to
TH
t
V
CC
to RST Delay
2
µs
RD
(V – 200mV)
TH
t
V
CC
Rising
RST Pulse Width
100
150
200
ms
rec
Push-Button Reset Detect (STM1813, STM1818)
t
Push-button Detect to RST
Push-button RST Time-out
STM1813/1818
From Rising Edge
STM1811/1816
STM1813/1818
1.5
100
3.5
3.1
µs
ms
kΩ
kΩ
PB
t
150
5.5
5.5
200
7.5
7.5
PBRST
Internal Pull-up Resistance
Note: 1. Valid for Ambient Operating Temperature: T = –40 to 105°C; V = 1.2V to 5.5V (except where noted).
A
CC
2. The STM1811/1813/1816/1818 have an internal pull-up resistor which may sink 1mA of current.
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STM1810/1811/1812/1813/1815/1816/1817/1818
PACKAGE MECHANICAL
Figure 22. SOT23-3 – 3-lead Small Outline Transistor Package Outline
E
E1
M
0.15
C A B
B
A1
1
e
D
e1
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 10. 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
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STM1810/1811/1812/1813/1815/1816/1817/1818
PART NUMBERING
Table 11. Ordering Information Scheme
Example:
STM1810
L
WX
7
F
Device Type
STM181x
Reset Threshold Voltage
STM1810 - 1813:
L = V
= 4.50V to 4.75V (4.62 typ)
= 4.25V to 4.49V (4.37 typ)
RST
M = V
RST
STM1815 - 1818:
T = V
S = V
= 2.98V to 3.15V (3.06 typ)
= 2.80V to 2.97V (2.88 typ)
= 2.47V to 2.64V (2.55 typ)
RST
RST
R = V
RST
Package
WX = SOT23-3
Temperature Range
7 = –40 to 105°C
Shipping Method
F = Pb-Free Package, Tape & Reel
Note: 1. Contact the local ST sales office for availability.
For other options, or for more information on any aspect of this device, please contact the ST Sales Office
nearest you.
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STM1810/1811/1812/1813/1815/1816/1817/1818
Table 12. Marking Description
Part Number
STM1810L
STM1810M
STM1811L
STM1811M
STM1812L
STM1812M
STM1813L
STM1813M
STM1815T
STM1815S
STM1815R
STM1816T
STM1816S
STM1816R
STM1817T
STM1817S
STM1817R
STM1818T
STM1818S
STM1818R
Reset Threshold
4.62V
4.37V
4.62V
4.37V
4.62V
4.37V
4.62V
4.37V
3.06V
2.88V
2.55V
3.06V
2.88V
2.55V
3.06V
2.88V
2.55V
3.06V
2.88V
2.55V
Output
Topside Marking
Push-Pull RST
Push-Pull RST
Open Drain RST
Open Drain RST
Push-Pull RST
Push-Pull RST
Open Drain RST
Open Drain RST
Push-Pull RST
Push-Pull RST
Push-Pull RST
Open Drain RST
Open Drain RST
Open Drain RST
Push-Pull RST
Push-Pull RST
Push-Pull RST
Open Drain RST
Open Drain RST
Open Drain RST
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REVISION HISTORY
Table 13. Document Revision History
Date
Revision
Revision Details
26-Aug-04
1.0
First Issue
Update reset characteristics, add typical graphs, remove SC70 references (Figure
1, 2, 4, 7, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20; Table 9, 11, 12)
05-Oct-04
2.0
19-Nov-04
07-Dec-04
29-Jun-05
3.0
4.0
5
Update dimensions (Table 10)
Remove some voltage options (Table 1, 9, 11, 12)
Temperature range change (Figure 14, 15, 16, 19; Table 8, 9, 11)
19/20
STM1810/1811/1812/1813/1815/1816/1817/1818
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
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