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ASM1233D, ASM1233D-L,  
ASM1233M  
Low Power, 5 V/3.3 V,  
mP Reset, Active LOW,  
Open-Drain Output  
http://onsemi.com  
Description  
The ASM1233D−L/1233D/1233M are voltage supervisors with  
low−power, 5/3.3 V mP Reset, with an active LOW, open−drain output.  
Maximum supply current over temperature is 15 mA for 3.3 V devices  
and 20 mA for 5 V devices.  
The ASM1233D−L/1233D/1233M generates an active LOW reset  
signal whenever the monitored supply is out of tolerance. A precision  
SOIC−8  
8 LEAD  
CASE 751BD  
SOT−223  
4 LEAD  
CASE 318E  
reference and comparator circuit monitors power supply (V ) level.  
CC  
The tolerances are 5%, 10% and 15%. When an out−of−tolerance  
condition is detected, an internal power−fail signal is generated which  
TO−92  
3 LEAD  
CASE 29−11  
forces an active LOW reset signal. After V  
returns to an  
CC  
in−tolerance condition, the reset signal remains active for 350 ms to  
allow the power supply and system microprocessor to stabilize.  
The ASM1233D−L/1233D/1233M is designed with an open drain  
output stage and operates over the extended industrial temperature  
range. These devices are available in compact SOT−223, SO−8 and  
TO−92 packages.  
PIN CONFIGURATIONS  
1
8
NC  
NC  
NC  
NC  
RESET  
2
3
4
7
6
5
Other low power products in this family include ASM1810/11/12/  
15/16/17.  
V
CC  
NC  
Features  
GND  
• Low Supply Current  
SO−8  
(Top View)  
• 15 mA Maximum (≤ 3.6 V), 20 mA Maximum (5.5 V)  
• Automatically Restarts a Microprocessor after Power Failure  
2
4
3
• 350 ms Reset Delay after V Returns to an In−tolerance Condition  
RESET  
GND  
CC  
• Active LOW Power−up Reset, 5 kW Internal Pull−up  
1
GND  
• Precision Temperature−compensated Voltage Reference and  
V
CC  
Comparator  
• Eliminates External Components  
• Low−cost SOT−223/SO−8/TO−92 Packages  
• Operating Temperature: −40°C to +85°C  
SOT−223  
(Top View)  
1 2 3  
Applications  
1 2 3  
1 2 3  
• Set−top Boxes  
• Cellular Phones  
(Top View)  
• PDAs  
• Energy Management Systems  
• Embedded Control Systems  
• Printers  
TO−92  
ASM1233D−L  
ASM1233D  
TO−92  
ASM1233M  
• Single Board Computers  
ORDERING INFORMATION  
See detailed ordering and shipping information in the package  
dimensions section on page 9 of this data sheet.  
© Semiconductor Components Industries, LLC, 2011  
1
Publication Order Number:  
August, 2011 − Rev. 3  
ASM1233D/D  
ASM1233D, ASM1233D−L, ASM1233M  
Figure 1. Typical Operating Circuit  
Figure 2. Block Diagram  
http://onsemi.com  
2
ASM1233D, ASM1233D−L, ASM1233M  
Table 1. PIN DESCRIPTION  
Pin #  
TO−92  
ASM1233D−L  
TO−92  
ASM1233M  
ASM1233D  
SO−8  
SOT−223  
Pin Name  
GND  
Description  
Ground.  
1
2
3
3
1
2
4
1,4  
2
1
RESET  
Active LOW reset output.  
Power supply input.  
No connection.  
2
3
V
CC  
3, 5, 6, 7 & 8  
NC  
Table 2. ABSOLUTE MAXIMUM RATINGS  
Parameter  
Min  
Max  
Unit  
V
Voltage on V (Note 1)  
−0.5  
−0.5  
−40  
7
CC  
Voltage on RESET (Note 1)  
Operating Temperature Range  
Soldering Temperature (for 10 sec)  
Storage Temperature  
V
+ 0.5  
V
CC  
+85  
+260  
+125  
2
°C  
°C  
°C  
KV  
V
−55  
ESD rating  
HBM  
MM  
200  
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the  
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect  
device reliability.  
1. Voltages are measured with respect to ground.  
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3
 
ASM1233D, ASM1233D−L, ASM1233M  
Table 3. DC ELECTRICAL CHARACTERISTICS (Unless otherwise noted, V = 5 V 10% and specifications are over the  
CC  
operating temperature range of −40°C to +85°C. All voltages are referenced to ground.) (Note 2)  
Parameter  
Supply Voltage  
Symbol  
Conditions  
Min  
Typ  
Max  
5.5  
Unit  
V
V
CC  
1.2  
Output Voltage  
V
RESET asserted  
0.4  
V
OL  
OH  
OL  
V
I
< 500 mA  
V
CC  
−0.5 V  
V −0.1 V  
CC  
OUT  
Output Current  
I
Output = 0.4 V  
< 5.5 V, RESET output open  
≤ 3.6 V, RESET output open  
ASM1233D−LZ−5  
ASM1233D−LZ−10  
ASM1233D−LZ−15  
ASM1233DZ−5  
8
mA  
Operating Current  
I
V
V
8
6
20  
mA  
CC  
CC  
15  
CC  
V
CC  
Trip Point  
V
CCTP  
2.98  
2.8  
3.06  
2.88  
3.15  
2.97  
2.8  
V
2.64  
4.5  
2.72  
4.625  
4.375  
4.125  
4.375  
4.625  
2.72  
4.74  
4.49  
4.24  
4.49  
4.75  
2.8  
ASM1233DZ−10  
4.25  
4.0  
ASM1233DZ−15  
ASM1233M−5  
4.25  
4.5  
ASM1233M−55  
ASM1233M−3  
2.64  
Voltage High Trip Level  
Voltage Low Trip Level  
V
ASM1233D, ASM1233MS−5,  
ASM1233MS−55  
4.75  
V
V
HTL  
ASM1233MS−3  
ASM1233D−L  
3.14  
3.06  
4.00  
V
ASM1233D, ASM1233MS−5,  
ASM1233MS−55  
LTL  
ASM1233MS−3  
ASM1233D−L  
2.48  
2.3  
7.5  
10  
Internal Pull−up Resistor  
R
3.5  
5.0  
2
kW  
pF  
ms  
P
Output Capacitance  
C
OUT  
RPD  
V
Detect to  
t
t
10  
CC  
RESET Low  
V
Detect to  
ASM1233D−L, ASM1233M  
200  
250  
300  
350  
350  
500  
450  
ms  
CC  
RPU  
RESET High  
ASM1233D  
V
Slew Rate  
t
F
ms  
CC  
(V  
− V  
)
HTL  
LTL  
V
Slew Rate  
t
R
0
ns  
CC  
(V  
− V  
)
LTL  
HTL  
2. A 1 kW resistor may be required in some applications for proper operation of the microprocessor reset control circuit.  
http://onsemi.com  
4
 
ASM1233D, ASM1233D−L, ASM1233M  
Table 4. FAMILY SELECTION GUIDE  
Part #  
ASM1810  
ASM1811  
ASM1812  
ASM1815  
ASM1816  
ASM1817  
ASM1233D  
ASM1233M  
ASM1233D−L  
RESET Voltage (V)  
4.620, 4.370, 4.120  
4.620, 4.350, 4.130  
4.620, 4.350, 4.130  
3.060, 2.880, 2.550  
3.060, 2.880, 2.550  
3.060, 2.880, 2.550  
4.625, 4.375, 4.125  
4.625, 4.375, 2.720  
3.060, 2.880, 2.720  
RESET Time (ms)  
Output Stage  
Push−Pull  
RESET Polarity  
LOW  
150  
150  
150  
150  
150  
150  
350  
350  
350  
Open−Drain  
Push−Pull  
LOW  
HIGH  
Push−Pull  
LOW  
Open−Drain  
Push−Pull  
LOW  
HIGH  
Open−Drain  
Open−Drain  
Open−Drain  
LOW  
LOW  
LOW  
Application Information  
Operation − Power Monitor  
The ASM1233D−L/1233D/1233M detects out−of−  
tolerance Power supply conditions. It resets a processor  
during powerup, Power−down and generates a reset to the  
system Processor when the monitored power supply voltage  
voltage is detected, the RESET signal is asserted. On  
power−up, RESET is kept active (LOW) for approximately  
350 ms after the power supply voltage has reached the  
selected tolerance. This allows the power supply and  
microprocessor to stabilize before RESET is released.  
is below the reset threshold. When an out−of−tolerance V  
CC  
Figure 3. Timing Diagram: Power−Up  
Figure 4. Timing Diagram: Power−Down  
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5
ASM1233D, ASM1233D−L, ASM1233M  
PACKAGE DIMENSIONS  
SOT−223 (TO−261)  
CASE 318E−04  
ISSUE N  
D
b1  
NOTES:  
1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994.  
2. CONTROLLING DIMENSION: INCH.  
MILLIMETERS  
INCHES  
NOM  
0.064  
0.002  
0.030  
0.121  
0.012  
0.256  
0.138  
0.091  
0.037  
−−−  
4
2
DIM  
A
A1  
b
b1  
c
D
E
e
e1  
L
L1  
MIN  
1.50  
0.02  
0.60  
2.90  
0.24  
6.30  
3.30  
2.20  
0.85  
0.20  
1.50  
6.70  
0°  
NOM  
1.63  
0.06  
0.75  
3.06  
0.29  
6.50  
3.50  
2.30  
0.94  
−−−  
1.75  
7.00  
−
MAX  
1.75  
0.10  
0.89  
3.20  
0.35  
6.70  
3.70  
2.40  
1.05  
−−−  
2.00  
7.30  
10°  
MIN  
0.060  
0.001  
0.024  
0.115  
0.009  
0.249  
0.130  
0.087  
0.033  
0.008  
0.060  
0.264  
0°  
MAX  
0.068  
0.004  
0.035  
0.126  
0.014  
0.263  
0.145  
0.094  
0.041  
−−−  
H
E
E
1
3
b
e1  
e
0.069  
0.276  
−
0.078  
0.287  
10°  
C
q
H
E
A
q
0.08 (0003)  
A1  
L
L1  
SOLDERING FOOTPRINT  
3.8  
0.15  
2.0  
0.079  
6.3  
0.248  
2.3  
0.091  
2.3  
0.091  
2.0  
0.079  
mm  
inches  
1.5  
0.059  
ǒ
Ǔ
SCALE 6:1  
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6
ASM1233D, ASM1233D−L, ASM1233M  
PACKAGE DIMENSIONS  
TO−92 (TO−226)  
CASE 29−11  
ISSUE AM  
NOTES:  
1. DIMENSIONING AND TOLERANCING PER ANSI  
Y14.5M, 1982.  
2. CONTROLLING DIMENSION: INCH.  
3. CONTOUR OF PACKAGE BEYOND DIMENSION R  
IS UNCONTROLLED.  
A
STRAIGHT LEAD  
BULK PACK  
B
R
4. LEAD DIMENSION IS UNCONTROLLED IN P AND  
BEYOND DIMENSION K MINIMUM.  
P
L
INCHES  
DIM MIN MAX  
MILLIMETERS  
SEATING  
PLANE  
K
MIN  
4.45  
4.32  
3.18  
0.407  
1.15  
2.42  
0.39  
12.70  
6.35  
2.04  
---  
MAX  
5.20  
5.33  
4.19  
0.533  
1.39  
2.66  
0.50  
---  
A
B
C
D
G
H
J
0.175  
0.170  
0.125  
0.016  
0.045  
0.095  
0.015  
0.500  
0.250  
0.080  
---  
0.205  
0.210  
0.165  
0.021  
0.055  
0.105  
0.020  
---  
D
X X  
G
J
H
V
K
L
---  
---  
N
P
R
V
0.105  
0.100  
---  
2.66  
2.54  
---  
C
SECTION X−X  
0.115  
0.135  
2.93  
3.43  
1
N
---  
---  
N
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7
ASM1233D, ASM1233D−L, ASM1233M  
PACKAGE DIMENSIONS  
SOIC 8, 150 mils  
CASE 751BD−01  
ISSUE O  
SYMBOL  
MIN  
NOM  
MAX  
1.35  
A
1.75  
A1  
b
0.10  
0.33  
0.19  
4.80  
5.80  
3.80  
0.25  
0.51  
0.25  
5.00  
6.20  
4.00  
c
E1  
E
D
E
E1  
e
h
L
θ
1.27 BSC  
0.25  
0.40  
0º  
0.50  
1.27  
8º  
PIN # 1  
IDENTIFICATION  
TOP VIEW  
D
h
A1  
θ
A
c
e
b
L
SIDE VIEW  
END VIEW  
Notes:  
(1) All dimensions are in millimeters. Angles in degrees.  
(2) Complies with JEDEC MS-012.  
http://onsemi.com  
8
ASM1233D, ASM1233D−L, ASM1233M  
Table 5. ORDERING INFORMATION  
RESET  
Output  
Voltage  
Open  
Drain  
Output  
RESET  
Tolerance  
RESET  
Time  
RESET  
Polarity  
Part Number  
Package  
Package Marking  
TIN − LEAD DEVICES  
ASM1233D−L−5  
(ASM1233A−5)  
3.06  
2.88  
2.72  
3.06  
2.88  
2.72  
5%  
10%  
15%  
5%  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
♦
♦
♦
♦
♦
♦
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
3L TO−92  
3L TO−92  
ASM1233D−L−5  
ASM1233D−L−10  
ASM1233D−L−15  
RVLL  
ASM1233D−L−10  
(ASM1233A−10)  
ASM1233D−L−15  
(ASM1233A−15)  
3L TO−92  
ASM1233D−LZ−5  
(ASM1233AZ−5)  
4L SOT−223  
4L SOT−223  
4L SOT−223  
ASM1233D−LZ−10  
(ASM1233AZ−10)  
10%  
15%  
RWLL  
ASM1233D−LZ−15  
(ASM1233AZ−15)  
RXLL  
ASM1233D−5  
ASM1233D−10  
4.625  
4.375  
4.125  
4.625  
4.375  
4.125  
4.625  
4.375  
2.72  
5%  
10%  
15%  
5%  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
3L TO−92  
3L TO−92  
3L TO−92  
4L SOT−223  
4L SOT−223  
4L SOT−223  
3L TO−92  
3L TO−92  
3L TO−92  
8L SOIC  
ASM1233D−5  
ASM1233D−10  
ASM1233D−15  
RSLL  
ASM1233D−15  
ASM1233DZ−5  
ASM1233DZ−10  
ASM1233DZ−15  
ASM1233M−55  
10%  
15%  
5%  
RTLL  
RULL  
ASM1233M−55  
ASM1233M−5  
ASM1233M−3  
ASM1233MS−55  
ASM1233MS−5  
ASM1233MS−3  
ASM1233M−5  
10%  
15%  
5%  
ASM1233M−3  
ASM1233MS−55  
ASM1233MS−5  
ASM1233MS−3  
LEAD FREE DEVICES  
ASM1233D−L−5F  
ASM1233D−L−10F  
ASM1233D−L−15F  
ASM1233D−LZ−5F  
ASM1233D−LZ−10F  
ASM1233D−LZ−15F  
ASM1233D−5F  
4.625  
4.38  
10%  
15%  
8L SOIC  
2.72  
8L SOIC  
3.06  
2.88  
5%  
10%  
15%  
5%  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
350 ms  
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
LOW  
3L TO−92  
3L TO−92  
3L TO−92  
4L SOT−223  
4L SOT−223  
4L SOT−223  
3L TO−92  
3L TO−92  
3L TO−92  
4L SOT−223  
4L SOT−223  
4L SOT−223  
3L TO−92  
3L TO−92  
3L TO−92  
8L SOIC  
ASM1233D−L−5F  
ASM1233D−L−10F  
ASM1233D−L−15F  
KVLL  
2.72  
3.06  
2.88  
10%  
15%  
5%  
KWLL  
2.72  
KXLL  
4.625  
4.375  
4.125  
4.625  
4.375  
4.125  
4.375  
4.625  
2.72  
ASM1233D−5F  
ASM1233D−10F  
ASM1233D−15F  
KSLL  
ASM1233D−10F  
ASM1233D−15F  
ASM1233DZ−5F  
ASM1233DZ−10F  
ASM1233DZ−15F  
ASM1233M−5F  
ASM1233M−55F  
ASM1233M−3F  
ASM1233MS−5F  
ASM1233MS−55F  
ASM1233MS−3F  
10%  
15%  
5%  
10%  
15%  
5%  
KTLL  
KULL  
ASM1233M−5F  
ASM1233M−55F  
ASM1233M−3F  
ASM1233MS−5F  
ASM1233MS−55F  
ASM1233MS−3F  
10%  
15%  
5%  
4.38  
4.625  
2.72  
10%  
15%  
8L SOIC  
8L SOIC  
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9
ASM1233D, ASM1233D−L, ASM1233M  
ON Semiconductor and  
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice  
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability  
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.  
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All  
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights  
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications  
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should  
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,  
and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death  
associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal  
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.  
PUBLICATION ORDERING INFORMATION  
LITERATURE FULFILLMENT:  
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USA/Canada  
Europe, Middle East and Africa Technical Support:  
Phone: 421 33 790 2910  
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Order Literature: http://www.onsemi.com/orderlit  
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For additional information, please contact your local  
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ASM1233D/D