ASM1233D September 2003 rev 1.0 Low Power, 5P Reset, Active LOW, Open-Drain Output General Description Applications The ASM1233D is a voltage supervisory device with low-power, * Set-top boxes 5V P Reset, and an active LOW, open-drain output. Maximum * Cellular phones supply current over temperature is a low 20A. * PDAs * Energy management systems The ASM1233D generates an active LOW reset signal * Embedded control systems whenever the monitored supply is out of tolerance. A precision * Printers reference and comparator circuit monitor power supply (VCC) level. Tolerance level options are 5%, 10% and 15%. When an * Single board computers out-of-tolerance condition is detected, an internal power-fail Typical Operating Circuit 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 VCC microprocessor to stabilize. ASM1233D The ASM1233D is designed with a open-drain output stage and operates over the extended industrial temperature range. Microprocessor Devices are available in compact surface mount SOT-223 packages and 3-lead TO-92 packages. RESET RESET Other low power products in this family include the ASM1810/ GND 11/12/15/16/17 and ASM1233M. Key Features * Block Diagram Low Supply Current *20 A maximum (5.5 V) VCC *15A 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, 5k internal pull-up * Precision temperature-compensated voltage reference and 3 ASM1233D 5.0k Supply Tolerance Bias 2 comparator + * Eliminates external components - * Low-cost TO-92 package * Compact surface mount SOT-223 package * Operating temperature -40C to +85C Delay 150ms Typical Reference 1 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 RESET ASM1233D September 2003 rev 1.0 Pin Configuration TO-92* RESET 2 GND 4 VCC ASM1233D-X SOT-223 ASM1233D-X 1 GND 3 1 2 3 Pin Description Pin # Pin Name Description SOT-223 TO-92 1 1 GND 2 2 RESET 3 3 VCC Power supply input 4 - GND Ground (SOT-223 only) Ground Active LOW reset output * See Ordering Information Low Power, 5P Reset, Active LOW, Open-Drain Output Notice: The information in this document is subject to change without notice 2 of 8 ASM1233D September 2003 rev 1.0 tF VCC Application Information VCCTP (MAX) Operation - Power Monitor VCCTP The ASM1233D detects out-of-tolerance power supply VCCTP (MIN) conditions. It resets a processor during power-up, powerthe monitored power supply voltage is below the reset threshold. When an out-of-tolerance VCC voltage is detected, RESET the RESET signal is asserted. On power-up, RESET is kept tRPD ~ ~ down and generates a reset to the system processor when 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. VOL tR Figure 2: Timing Diagram: Power-Down VCCTP (MAX) VCCTP VCCTP (MIN) ~ tRPU VCC VOH ~ RESET Figure 1: Timing Diagram: Power-Up Low Power, 5P Reset, Active LOW, Open-Drain Output Notice: The information in this document is subject to change without notice 3 of 8 ASM1233D September 2003 rev 1.0 Absolute Maximum Ratings Parameter Min Max Unit Voltage on VCC -0.5 7 V Voltage on RESET -0.5 VCC + 0.5 V Operating Temperature Range -40 85 C 260 C 125 C Soldering Temperature (for 10 sec) Storage Temperature -55 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. Electrical Characteristics Unless otherwise noted, VCC = 1.2V to 5.5V and specifications are over the operating temperature range of -40C to +85C. All voltages are referenced to ground Parameter Symbol Conditions Supply Voltage VCC Output Voltage VOH IOUT < 500 A Output Current IOL Output = 0.4V, VCC >= 2.7V Operating Current ICC VCC < 5.5V, RESET output open Operating Current ICC Min Typ 1.2 VCC - 0.5V Max Unit 5.5 V VCC - 0.1V V +8 mA VCC < =3.6V, RESET output open 8 20 A 6 15 A VCC Trip Point (ASM1233D-5) VCCTP 4.50 4.625 4.74 V VCC Trip Point (ASM1233D-10) VCCTP 4.25 4.375 4.49 V VCC Trip Point (ASM1233D-15) VCCTP 4.00 4.125 4.24 V RP 3.5 5.0 7.5 k 10 pF 350 450 ms 2 5 s Internal Pull-up Resistor Output Capacitance COUT RESET Active Time tRESET VCC Detect to RESET Low tRPD VCC Slew Rate (VCCTP (MAX) to VCCTP (MIN) VCC Slew Rate (VCCTP (MIN) to VCCTP (MAX) VCC Detect to RESET High 250 tF 300 s tR 0 ns tRPU tr = 5s 250 350 450 ms Note: The tF value is for reference in defining values for tRPD and should not be considered for proper operation or use. Low Power, 5P Reset, Active LOW, Open-Drain Output Notice: The information in this document is subject to change without notice 4 of 8 ASM1233D September 2003 rev 1.0 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 Low Power, 5P Reset, Active LOW, Open-Drain Output Notice: The information in this document is subject to change without notice 5 of 8 ASM1233D September 2003 rev 1.0 Package Information TO-92 (3 Pin) SOT-223 (4-Pin) A B L B E D e S D H Section A-A J C Section A-A F Q1 D M K E A1 A C Q G I Bottom View Q2 B1 e1 H Dimensions in millimeters Min Max Dimensions in millimteres Dimensions in Inches Min Min Max Plastic SOT-223** (4-Pin) 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 10 MAX Min Max TO-92* (3-Pin) A Q Max Dimensions in inches 10 MAX Q1 16 10 16 10 Q2 16 10 16 10 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 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 Low Power, 5P Reset, Active LOW, Open-Drain Output Notice: The information in this document is subject to change without notice 3.00 6 of 8 ASM1233D September 2003 rev 1.0 Ordering Information Device Summary Package Marking Part Number RESET Output Voltage (V) RESET Tolerance (%) RESET Time (ms) OpenDrain Output Stage*** TO-92 Package* A B C D A=5% B=10% C=15% ASM1233D-5 4.625 5 350 LOW ASM1233D-10 4.375 10 350 LOW ASM1233D-15 4.125 15 350 LOW ASM1233DZ-5 4.625 5 350 LOW 3 3 D A ASM1233DZ-10 4.375 10 350 LOW 3 3 D B ASM1233DZ-15 4.125 15 350 LOW 3 3 D C SOT-223 Package** RESET Polarity * Add /S to Part Number for straight (unformed) leads. (i.e. ASM1233xx-x/S) ** Add /T to Part Number for Tape and Reel (i.e ASM1233xx-x/T) ** Internal 5k resistor pull-up Low Power, 5P Reset, Active LOW, Open-Drain Output Notice: The information in this document is subject to change without notice 7 of 8 ASM1233D Alliance Semiconductor Corporation 2575, Augustine Drive, Santa Clara, CA 95054 Tel: 408 - 855 - 4900 Fax: 408 - 855 - 4999 www.alsc.com Copyright (c) Alliance Semiconductor All Rights Reserved Part Number: ASM1233D Document Version: 1.0 (c) 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. 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