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PDF ASM1233D-D Data sheet ( Hoja de datos )
| Número de pieza | ASM1233D-D | |
| Descripción | Open-Drain Output | |
| Fabricantes | Alliance Semiconductor | |
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March 2005
ASM1233D-L/D/M
rev 1.3
Low Power, 5V/3.3V, µP Reset, Active LOW, Open-Drain Output
General Description
The ASM1233D-L/1233D/1233M are voltage supervisors with
low-power, 5/3.3V µP Reset, with an active LOW, open-drain
output. Maximum supply current over temperature is 15µA for
3.3V devices and 20µA for 5V devices.
The ASM1233D-L/1233D/1233M generates an active LOW
reset signal whenever the monitored supply is out of tolerance.
A precision reference and comparator circuit monitors power
supply (VCC) level. The tolerance are 5%,10% and 15%. When
an out-of-tolerance condition is detected, an internal power-fail
signal is generated which forces an active LOW reset signal.
After VCC returns to an in-tolerance condition, the reset signal
remains active for 350ms to allow the power supply and system
microprocessor to stabilize.
Applications
• Set-top boxes
• Cellular phones
• PDAs
• Energy management systems
• Embedded control systems
• Printers
• Single board computers
Typical Operating Circuit
VCC
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.
Other low power products in this family include ASM1810/11/
12/15/16/17.
RESET
GND
Microprocessor
RESET
Key Features
• Low Supply Current
• 15µA maximum (<=3.6V), 20µA maximum (5.5V)
• Automatically restarts a microprocessor after power failure
• 350ms reset delay after VCC returns to an in-tolerance con-
dition
• Active LOW power-up reset, 5kΩ internal pull-up
• Precision temperature-compensated voltage reference and
comparator
• Eliminates external components
• Low-cost SOT-223/SO-8/TO-92 packages
• Operating temperature: -40°C to +85°C
Block Diagram
VCC
ASM1233D-L,ASM1233D,ASM1233M
Supply
ToBleiarasnce
+
-
Reference
5.0kΩ
Delay
350ms
Typical
RESET
GND
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
1 page  
March 2005
ASM1233D-L/D/M
rev 1.3
Electrical Characteristics
Unless otherwise noted, VCC = 5V+10% 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
VCC
VOL
VOH
IOL
RESET asserted
IOUT < 500 µA
Output = 0.4V
1.2
-
VCC-0.5V
8
-
VCC-0.1V
5.5 V
0.4
V
mA
Operating Current
VCC < 5.5V, RESET output open
ICC
VCC < =3.6V, RESET output open
8 20
µA
6 15
VCC Trip Point
Voltage High Trip Level
Voltage Low Trip Level
Internal Pull-up Resistor
Output Capacitance
VCCTP
VHTL
VLTL
RP
COUT
ASM1233D-LZ-5
ASM1233D-LZ-10
ASM1233D-LZ-15
ASM1233DZ-5
ASM1233DZ-10
ASM1233DZ-15
ASM1233M-5
ASM1233M-55
ASM1233M-3
ASM1233D, ASM1233MS-5,
ASM1233MS-55
ASM1233MS-3
ASM1233D-L
ASM1233D, ASM1233MS-5,
ASM1233MS-55
ASM1233MS-3
ASM1233D-L
2.98 3.06 3.15
2.8 2.88 2.97
2.64 2.72 2.8
4.5
4.625
4.74
4.25
4.375
4.49 V
4.0
4.125
4.24
4.25
4.375
4.49
4.5
4.625
4.75
2.64 2.72 2.8
4.75
3.14 V
3.06
4.00
V
2.48
2.3
3.5 5.0 7.5 kΩ
10 pF
VCC Detect to RESET Low
tRPD
2 10 µs
VCC Detect to RESET High
tRPU
ASM1233D-L, ASM1233M
ASM1233D
200 350 500
ms
250 350 450
VCC Slew Rate
(VHTL - VLTL)
tF
300 µs
VCC Slew Rate
(VLTL - VHTL)
tR
0 ns
Note: A 1kΩ resistor maybe required in some applications for proper operation of the microprocessor reset control circuit.
Low Power, 5V/3.3V, µP Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
5 of 11
5 Page 
ASM1233D-L/D/M
Alliance Semiconductor Corporation
2575, Augustine Drive,
Santa Clara, CA 95054
Tel: 408 - 855 - 4900
Fax: 408 - 855 - 4999
www.alsc.com
Copyright © Alliance Semiconductor
All Rights Reserved
Part Number: ASM1233D-L/D/M
Document Version: 1.3
© 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.
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