Datasheet ASM1233M Datasheet (Alliance Semiconductor)

Page 1
查询ASM1233M供应商
October 2003
rev 1.0
General Description
The ASM1233M is a voltage supervisor with low-power, 5V µP
Reset, with an active LOW, open-drain output. Maximum supply
current over temperature is a low 20µA.
The ASM1233M generates an active LOW reset signal
whenever the monitored supply is out of tolerance. A precision
reference and comparator circuit monitor power supply (V
level. Tolerance level options are 5% ,and 10% for a 5V power
supply. The tolerance is 15% for the 3.3V, ASM1233M. When
an out-of-tolerance condition is detected, an internal power-fail
signal is generated which forces an active LOW reset signal.
After V
remains active for 350ms to allow the power supply and system
microprocessor to stabilize.
The ASM1233M is designed with a open-drain output stage and
operates over the extended industrial temperature range.
Devices are available in compact surface mount SO-8
packages and 3-lead TO-92 packages.
returns to an in-tolerance condition, the reset signal
CC
CC
Applications
Set-top boxes
Cellular phones
•PDAs
Energy management systems
Embedded control systems
Printers
Single board computers
)
Typical Operating Circuit
V
CC
ASM1233M
RESET
ASM1233M
Microprocessor
RESET
Other low power products in this family include the ASM1810/
11/12/15/16/17 and ASM1233D.
Key Features
Low Supply Current
•20 µA maximum (5.5 V)
•15µA maximum (3.6 V)
Automatically restarts a microprocessor after power failure
350ms reset delay after V
dition
Active LOW power-up reset, 5k internal pull-up
Precision temperature-compensated voltage reference and
comparator
Eliminates external components
Low-cost TO-92 package
Compact surface mount SO-8 package
Operating temperature -40°C to +85°C
returns to an in-tolerance con-
CC
Alliance Semiconductor
2575 Augustine Drive . Santa Clara, CA 95054 . Tel: 408.855.4900 . Fax: 408.855.4999 . www.alsc.com
Notice: The information in this document is subject to change without notice
GND
Block Diagram
V
CC
2
ASM1233M
5.0k
Supply
Tolerance
Bias
Delay
+
+
-
-
Reference
Delay
150ms
150ms
Typical
Typical
GND
4
1
RESET
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October 2003
rev 1.0
Pin Configuration
ASM1233M
RESET
V
CC
NC
GND
Pin Description
Pin #
SO-8 TO-92
1 1 RESET Active LOW reset output
22
SO-8
1
2
3
4
8
NC
NC
7
NC
6
ASM1233M-X
NC
5
Pin Name Description
V
CC
Power supply input
TO-92*
ASM1233M-X
2
1
3
3, 5, 6, 7 and 8 - NC No Connection.
4 3 GND Ground.
* See Ordering Information
Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
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October 2003
rev 1.0
Application Information
Operation - Power Monitor
The ASM1233M detects out-of-tolerance power supply
conditions. It resets a processor during power-up, power-
down and generates a reset to the system processor when
the monitored power supply voltage is below the reset
threshold. When an out-of-tolerance V
the RESET signal is asserted. On power-up, RESET is kept
active (LOW) for approximatley 350ms after the power supply
voltage has reached the selected tolerance. This allows the
power supply and microprocessor to stablize before RESET
is released.
t
(MIN)
V
CCTP
voltage is detected,
CC
R
V
CCTP
V
CCTP
(MAX)
t
V
CCTP
F
t
RPD
V
OL
V
CC
V
(MAX)
CCTP
RESET
Figure 2: Timing Diagram: Power-Down
ASM1233M
V
(MIN)
CCTP
~
~
~
~
V
CC
~
RESET
Figure 1: Timing Diagram: Power-Up
~
t
RPU
V
OH
Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
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October 2003
rev 1.0
Absolute Maximum Ratings
Parameter Min Max Unit
ASM1233M
Voltage on V
Voltage on RESET -0.5 VCC + 0.5 V
Operating Temperature Range -40 85 °C
Soldering Temperature (for 10 sec) 260 °C
Storage Temperature -55 125 °C
NOTE: These are stress ratings only and functional use is not implied. Exposure to absolute maximum rat­ings for prolonged periods of time may affect device reliability.
CC
-0.5 7 V
Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
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October 2003
ASM1233M
rev 1.0
Electrical Characteristics
Unless otherwise noted, VCC = 1.2V to 5.5V and specifications are over the operating temperature range of -40°C to +85°C.
All voltages are referenced to ground.
Parameter Symbol Conditions Min Typ Max Unit
Supply Voltage
Output Voltage
Output Current
Operating Current
Operating Current
V
Trip Point (ASM1233M-5) V
CC
VCC Trip Point (ASM1233M-55) V
VCC Trip Point (ASM1233M-3) V
Voltage High Trip Level ASM1233M-5 ASM1233M-55
Voltage Low Trip Level ASM1233M-5 ASM1233M-55
Voltage High Trip Level ASM1233M-3
V
CC
V
OH
I
OL
I
CC
I
CC
CCTP
CCTP
CCTP
V
HTL
V
LTL
V
HTL
1.2 5.5 V
I
< 500 µA VCC - 0.5V VCC - 0.1V
OUT
Output = 0.4V, VCC >= 2.7V
VCC < 5.5V, RESET output open
VCC < =3.6V, RESET output
open
+8 mA
4.25 4.375 4.49 V
4.5 4.625 4.75 V
2.64 2.72 2.8 V
V
820µA
615µA
4.75
4.00 V
3.14 V
V
C
R
OUT
RPD
t
F
t
R
RPU
P
tr = 5µs
Internal Pull-up Resistor
Output Capacitance
Detect to RESET Low t
V
CC
Slew Rate
V
CC
(V
- V
- V
LTL
HTL
)
)
HTL
Slew Rate
V
CC
(V
LTL
VCC Detect to RESET High t
Note: A 1k resistor maybe required in some applications for proper operation of the microprocessor reset control circuit.
3.5 5.0 7.5 k
10 pF
210µs
300 µs
0ns
200 350 500 ms
Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
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October 2003
rev 1.0
Family Selection Guide
ASM1233M
Part # RESET Voltage (V)
ASM1810 4.620, 4.370, 4.120 150 Push-Pull LOW
ASM1811 4.620, 4.350, 4.130 150 Open-Drain LOW
ASM1812 4.620, 4.350, 4.130 150 Push-Pull HIGH
ASM1815 3.060, 2.880, 2.550 150 Push-Pull LOW
ASM1816 3.060, 2.880, 2.550 150 Open-Drain LOW
ASM1817 3.060, 2.880, 2.550 150 Push-Pull HIGH
ASM1233D 4.625, 4.375, 4.125 350 Open-Drain LOW
ASM1233M 4.625, 4.375, 2.720 350 Open-Drain LOW
RESET Time
(ms)
Output Stage RESET Polarity
Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
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October 2003
rev 1.0
Package Information
ASM1233M
Plastic SO-8 (8-Pin)
EH
D
A1
e
B
Inches Millimeters
Min Max Min Max
Plastic SO-8 (8-Pin)
A 0.053 0.069 1.35 1.75
A1 0.004 0.010 0.10 0.25
B 0.013 0.020 0.33 0.51
C 0.007 0.010 0.19 0.25
e 0.050 1.27
E 0.150 0.157 3.80 4.00
H 0.228 0.244 5.80 6.20
L 0.016 0.050 0.40 1.27
D 0.189 0.197 4.80 2.00
0° - 8°
A
TO-92 (3-Pin)
A
B
Section
A-A
D
F
C
E
L
G
H
A 0.175 0.195 4.45 4.95
B 0.170 0.192 4.32 4.96
C 0.500 0.610 12.70 15.49
D 0.016 0.022 0.406 0.559
E 0.095 0.105 2.41 2.67
F 0.045 0.60 1.14 1.52
G 0.45 0.060 1.14 1.52
H 0.085 0.095 2.16 2.41
C
I
Bottom View
Inches Millimeters
Min Max Min Max
Plastic SO-8 (8-Pin)
M
K
TO-92* (3-Pin)
L
D
J
Section
A-A
I 0.130 0.155 3.30 3.94
J 0.014 0.020 0.35 0.51
K 0.093 0.115 2.36 2.92
L 45° 60° 45° 60°
M 0.118 Typical 3.00
Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
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October 2003
rev 1.0
Ordering Information
ASM1233M
Device Summary
RESET
Part Number
ASM1233M-55 4.625 5 350  LOW
ASM1233M-5 4.375 10 350  LOW
ASM1233M-3 2.720 15 350  LOW
ASM1233MS-55 4.625 5 350 LOW
ASM1233MS-5 4.375 10 350 LOW
ASM1233MS-3 2.720 15 350 LOW
* Add /S to Part Number for straight (unformed) leads. (i.e. ASM1233xx-x/S) ** Internal 5k resistor pull-up
Output
Vol tage (V)
RESET
Tol era nce
(%)
RESET
Time (ms)
Open-Drain
Output
Stage**
TO-92
Package*
SO-8
Package
RESET
Polarity
Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
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ASM1233M
Alliance Semiconductor Corporation 2575, Augustine Drive, Santa Clara, CA 95054 Tel: 408 - 855 - 4900 Fax: 408 - 855 - 4999 www.alsc.com
© Copyright 2003 Alliance Semiconductor Corporation. All rights reserved. Our three-point logo, our name and Intelliwatt are trademarks or registered trademarks of Alliance. All other brand and product names may be the trademarks of their respective companies. Alliance reserves the right to make changes to this document and its products at any time without notice. Alliance assumes no responsibility for any errors that may appear in this document. The data contained herein represents Alliance's best data and/or estimates at the time of issuance. Alliance reserves the right to change or correct this data at any time, without notice. If the product described herein is under development, significant changes to these specifications are possible. The information in this product data sheet is intended to be general descriptive information for potential customers and users, and is not intended to operate as, or provide, any guarantee or warrantee to any user or customer. Alliance does not assume any responsibility or liability arising out of the application or use of any product described herein, and disclaims any express or implied warranties related to the sale and/or use of Alliance products including liability or warranties related to fitness for a particular purpose, merchantability, or infringement of any intellectual property rights, except as express agreed to in Alliance's Terms and Conditions of Sale (which are available from Alliance). All sales of Alliance products are made exclusively according to Alliance's Terms and Conditions of Sale. The purchase of products from Alliance does not convey a license under any patent rights, copyrights; mask works rights, trademarks, or any other intellectual property rights of Alliance or third parties. Alliance does not authorize its products for use as critical components in life-supporting systems where a malfunction or failure may reasonably be expected to result in significant injury to the user, and the inclusion of Alliance products in such life-supporting systems implies that the manufacturer assumes all risk of such use and agrees to indemnify Alliance against all claims arising from such use.
Copyright © Alliance Semiconductor All Rights Reserved Part Number: ASM1233M Document Version: 1.0
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