ASM1233A ALSC | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 9

Technical content

Notice: The information in this document is subject to change without notice rev 1.0 Low Power, 3.3V, µP Reset, Active LOW, Open-Drain Output November 2003 General Description The ASM1233A is a voltage supervisor with low-power, 3.3V µP Reset, with an active LOW, open-drain output. Maximum supply current over temperature is a low 15µA. The ASM1233A generates an active LOW reset signal whenever the monitored supply is out of tolerance. A precision reference and comparator circuit monitor power supply (V CC) level. The tolerance is 15% for the 3.3V, ASM1233A. When an out-of-tolerance condition is de tected, 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. The ASM1233A is designed with a open-drain output stage and operates over the extended i ndustrial temperature range. Devices are available in compact SOT-223 packages. Other low power products in this family include the ASM1810/ 11/12/15/16/17, ASM1233D, and ASM1233M Key Features

  • Low Supply Current
  • 15µA maximum (3.6 V)
  • Automatically restarts a microprocessor after power failure
  • 350ms reset delay after V CC returns to an in-tolerance con- dition
  • Active LOW power-up reset, 5k Ω internal pull-up
  • Precision temperature-compensated voltage reference and comparator
  • Eliminates external components
  • Low-cost SOT-223 package
  • Operating temperature -40°C to +85°C

Applications

  • Set-top boxes
  • Cellular phones
  • P D A s
  • Energy management systems
  • Embedded control systems
  • Printers
  • Single board computers Typical Operating Circuit Block Diagram GND Supply Reference Delay 350ms Typical Tolerance Bias Microprocessor ASM1233A VCC RESET Delay Typical VCC RESET RESET GND ASM1233A 5.0kΩ

Notice: The information in this document is subject to change without notice Low Power, 3.3V, µP Reset, Active LOW, Open-Drain Output rev 1.0 November 2003 Pin Configuration Pin Description Pin# Pin Name Description 1 GND Ground. 2 RESET Active LOW reset output. 3 VCC Power supply input. 4 GND Ground. ASM1233A SOT-223 4GND RESET VCC GND

Notice: The information in this document is subject to change without notice Low Power, 3.3V, µP Reset, Active LOW, Open-Drain Output rev 1.0 November 2003 Absolute Maximum Ratings Parameter Min Max Unit Voltage on VCC -0.5 7 V Voltage on RESET -0.5 V CC + 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 rat- ings for prolonged periods of time may affect device reliability.

Notice: The information in this document is subject to change without notice Low Power, 3.3V, µP Reset, Active LOW, Open-Drain Output rev 1.0 November 2003

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 VCC 1.2 5.5 V Output Voltage VOH IOUT < 500 µA V CC - 0.5V V CC - 0.1V V Output Current IOL Output = 0.4V, VCC >= 2.7V +8 mA Operating Current ICC VCC < =3.6V, RESET output open 61 5 µ A VCC Trip Point (ASM1233A-3) V CCTP 2.64 2.72 2.8 V Voltage High Trip Level ASM1233A-3 VHTL 3.14 V Internal Pull-up Resistor RP 3.5 5.0 7.5 k Ω Output Capacitance COUT 10 pF VCC Detect to RESET Low t RPD 21 0 µ s VCC Slew Rate (VHTL - VLTL ) tF 300 µs VCC Slew Rate (VLTL - VHTL) tR 0n s VCC Detect to RESET High t RPU tr = 5µs 200 350 500 ms Note: A 1kΩ resistor maybe required in some applications for proper operation of the microprocessor reset control circuit.

Notice: The information in this document is subject to change without notice Low Power, 3.3V, µP Reset, Active LOW, Open-Drain Output rev 1.0 November 2003 Family Selection Guide Part # RESET Voltage (V) RESET Time (ms) Output Stage RESET Polarity 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 ASM1233A 2.720 350 Open-Drain LOW

Notice: The information in this document is subject to change without notice Low Power, 3.3V, µP Reset, Active LOW, Open-Drain Output rev 1.0 November 2003

Package Information

Dimensions in millimeters Dimensions in Inches Min Max Min Max A 0.067 0.060 1.70 1.50 A1 0.004 0.0008 0.10 0.02 B 0.124 0.116 3.15 2.95 B1 0.033 0.026 0.85 0.65 C 0.014 0.010 0.35 0.25 D 0.264 0.248 6.70 6.30 e 0.0905 NOM 2.30 NOM e1 0.181 NOM 4.50 NOM E 0.146 0.130 3.70 3.30 h 0.287 0.264 7.30 6.70 s 0.041 0.033 1.05 0.85 Q 10 ° MAX 10 ° MAX Q1 16° 10° 16° 10° Q2 16° 10° 16° 10° B E H S e D AA1 Q C

Notice: The information in this document is subject to change without notice Low Power, 3.3V, µP Reset, Active LOW, Open-Drain Output rev 1.0 November 2003

Ordering Information

Part Number RESET Output Voltage RESET Tolerance RESET Time Open-Drain Output Stage* RESET Polarity ASM1233AZ-15 2.720 V 15% 350 ms ‹ LOW * Internal 5kΩ resistor pull-up

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 Preliminary Information Part Number: ASM1233A Document Version: 1.0 © Copyright 2003 Alliance Semiconductor Corporation. All rights reserved. Our three-point logo, our name and Intelliwatt are tr ademarks or registered trademarks of Alliance. All other brand and product names may be the trademarks of their respective companies. Allia nce 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 Al liance's best data and/or estimates at the time of issuance. Al liance reserves the right to change or correct this data at any time, without notice. If the product described herein is under development, signifi cant changes to these specifications are possible. The information in this product data sheet is intended to be general descriptive information for p otential 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 prod uct described herein, and disclaims any express or implied warran ties related to the sale and/or use of Alliance products including liability or warrant ies related to fitness for a particular purpose, merchantability, or infringement of any intellectual property rights, except as express agreed to in Al liance's Terms and Conditions of Sale (which are available from Alliance). All sales of Alliance products are made exclusively accord ing to Alliance's Terms and Conditions of Sale. The purchase of products from Alli ance does not convey a license under any patent rights, copyrights; mask work s rights, trademarks, or any other intellectual property rights of Alliance or third parties. Alliance does not authorize its products for use as crit ical components in life-supporti ng systems where a malfunction or failure may reasonably be expected to result in significant injury to the user, and the inclusio n of Alliance products in such life-support ing systems implies that the manufacturer assumes all risk of such use and agrees to indemnify Alliance against all claims arising from such use. ASM1233A