ASM1233M-5

October 2003 rev 1.0 ASM1233M Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output Applications • • • • • • • Set-top boxes Cellular phones PDAs Energy management systems Embedded control systems Printers Single board computers 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 (VCC) 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 VCC returns to an in-tolerance condition, the reset signal remains active for 350ms to allow the power supply and system microprocessor to stabilize. Typical Operating Circuit VCC ASM1233M 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. Other low power products in this family include the ASM1810/ 11/12/15/16/17 and ASM1233D. RESET RESET Microprocessor GND 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 VCC returns to an in-tolerance condition Active LOW power-up reset, 5kΩ 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 Reference Supply Tolerance Bias Block Diagram VCC 2 ASM1233M 5.0kΩ 1 + RESET Delay 150ms Typical - GND 4 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 October 2003 rev 1.0 ASM1233M Pin Configuration SO-8 ASM1233M-X TO-92* 8 7 6 5 NC NC NC NC ASM1233M-X RESET VCC NC GND 1 2 3 4 1 2 3 Pin Description Pin # Pin Name SO-8 1 2 3, 5, 6, 7 and 8 4 * See Ordering Information Description Active LOW reset output Power supply input No Connection. Ground. TO-92 1 2 3 RESET VCC NC GND Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output Notice: The information in this document is subject to change without notice 2 of 9 October 2003 rev 1.0 ASM1233M VCC VCCTP (MAX) VCCTP VCCTP (MIN) tF Application Information Operation - Power Monitor The ASM1233M detects out-of-tolerance power supply conditions. It resets a processor during power-up, powerdown and generates a reset to the system processor when threshold. When an out-of-tolerance VCC voltage is detected, 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. tR VCCTP (MAX) VCCTP (MIN) VCCTP RESET tRPD VOL Figure 2: Timing Diagram: Power-Down VCC tRPU VOH RESET Figure 1: Timing Diagram: Power-Up ~ ~ 3 of 9 the monitored power supply voltage is below the reset ~ ~ ~ ~ Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output Notice: The information in this document is subject to change without notice October 2003 rev 1.0 ASM1233M Absolute Maximum Ratings Parameter Voltage on VCC Voltage on RESET Operating Temperature Range Soldering Temperature (for 10 sec) Storage Temperature -55 Min -0.5 -0.5 -40 Max 7 VCC + 0.5 85 260 125 Unit V V °C °C °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. Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output Notice: The information in this document is subject to change without notice 4 of 9 October 2003 rev 1.0 ASM1233M 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 Supply Voltage Output Voltage Output Current Operating Current Operating Current VCC Trip Point (ASM1233M-5) VCC Trip Point (ASM1233M-55) VCC Trip Point (ASM1233M-3) Voltage High Trip Level ASM1233M-5 ASM1233M-55 Voltage Low Trip Level ASM1233M-5 ASM1233M-55 Voltage High Trip Level ASM1233M-3 Internal Pull-up Resistor Output Capacitance VCC Detect to RESET Low VCC Slew Rate (VHTL - VLTL ) VCC Slew Rate (VLTL - VHTL) VCC Detect to RESET High Symbol VCC VOH IOL ICC ICC VCCTP VCCTP VCCTP VHTL Conditions Min 1.2 Typ Max 5.5 Unit V V mA IOUT < 500 µA Output = 0.4V, VCC >= 2.7V VCC < 5.5V, RESET output open VCC < =3.6V, RESET output open VCC - 0.5V +8 VCC - 0.1V 8 6 4.25 4.5 2.64 4.375 4.625 2.72 20 15 4.49 4.75 2.8 4.75 µA µA V V V V VLTL 4.00 V VHTL RP COUT tRPD tF tR tRPU tr = 5µs 300 2 3.5 5.0 3.14 7.5 10 10 V kΩ pF µs µs 0 200 350 500 ns ms Note: A 1kΩ resistor maybe required in some applications for proper operation of the microprocessor reset control circuit. Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output Notice: The information in this document is subject to change without notice 5 of 9 October 2003 rev 1.0 ASM1233M Family Selection Guide Part # ASM1810 ASM1811 ASM1812 ASM1815 ASM1816 ASM1817 ASM1233D ASM1233M 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 RESET Time (ms) 150 150 150 150 150 150 350 350 Output Stage Push-Pull Open-Drain Push-Pull Push-Pull Open-Drain Push-Pull Open-Drain Open-Drain RESET Polarity LOW LOW HIGH LOW LOW HIGH LOW LOW Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output Notice: The information in this document is subject to change without notice 6 of 9 October 2003 rev 1.0 ASM1233M Package Information Plastic SO-8 (8-Pin) A L M D J C Section A-A TO-92 (3-Pin) B E H Section A-A D D A1 A 0° - 8° C F E K e B L G I Bottom View H Inches Min Max Millimeters Min Max Min 1.75 0.25 0.51 0.25 1.27 A B C D E F G H I J K L M 0.175 0.170 0.500 0.016 0.095 0.045 0.45 0.085 0.130 0.014 0.093 45° Inches Max Millimeters Min Max Plastic SO-8 (8-Pin) A A1 B C e E H L D 0.150 0.228 0.016 0.189 0.053 0.004 0.013 0.007 0.050 0.157 0.244 0.050 0.197 3.80 5.80 0.40 4.80 0.069 0.010 0.020 0.010 1.35 0.10 0.33 0.19 Plastic SO-8 (8-Pin) TO-92* (3-Pin) 0.195 0.192 0.610 0.022 0.105 0.60 0.060 0.095 0.155 0.020 0.115 60° 4.45 4.32 12.70 0.406 2.41 1.14 1.14 2.16 3.30 0.35 2.36 45° 3.00 4.95 4.96 15.49 0.559 2.67 1.52 1.52 2.41 3.94 0.51 2.92 60° 4.00 6.20 1.27 2.00 0.118 Typical Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output Notice: The information in this document is subject to change without notice 7 of 9 October 2003 rev 1.0 ASM1233M Ordering Information Device Summary RESET Output Voltage (V) 4.625 4.375 2.720 4.625 4.375 2.720 RESET Tolerance (%) 5 10 15 5 10 15 RESET Time (ms) 350 350 350 350 350 350 Open-Drain Output Stage** TO-92 Package* SO-8 Package RESET Polarity LOW LOW LOW LOW LOW LOW Part Number ASM1233M-55 ASM1233M-5 ASM1233M-3 ASM1233MS-55 ASM1233MS-5 ASM1233MS-3 * Add /S to Part Number for straight (unformed) leads. (i.e. ASM1233xx-x/S) ** Internal 5kΩ resistor pull-up Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output Notice: The information in this document is subject to change without notice 8 of 9 ASM1233M 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: ASM1233M Document Version: 1.0 © 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. 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