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March 2005
rev 1.3
ASM1233D-L/D/M
Low Power, 5V/3.3V, P 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 ASM1233D-L/1233D/1233M are voltage supervisors with low-power, 5/3.3V P Reset, with an active LOW, open-drain output. Maximum supply current over temperature is 15A for 3.3V devices and 20A 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. The ASM1233D-L/1233D/1233M is designed with an opendrain 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.
Typical Operating Circuit
VCC
ASM1233D-L/D/M
Microprocessor
RESET RESET
GND
Block Diagram Key Features
* * * * * * * * Low Supply Current * 15A maximum (<=3.6V), 20A maximum (5.5V) 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 comparator Eliminates external components Low-cost SOT-223/SO-8/TO-92 packages Operating temperature: -40C to +85C
Reference Supply Tolerance Bias ASM1233D-L,ASM1233D,ASM1233M
VCC
5.0k
+
RESET Delay 350ms Typical
-
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
March 2005
rev 1.3
ASM1233D-L/D/M
Pin Configuration
SOT-223 RESET GND VCC 2 4 3 RESET
ASM1233D-L ASM1233D
SO-8 1 2 3 4
ASM1233M
TO-92 8 7 6 5 NC NC NC NC
ASM1233D-L ASM1233D ASM1233M
VCC 1 GND NC GND
1
2
3
Pin Description
Pin# TO-92 ASM1233D-L ASM1233D 1 2 3 TO-92 ASM1233M 3 1 2 Pin Name SO-8 SOT-223 Description
4 1 2 3,5,6,7&8
1,4 2 3 -
GND RESET VCC NC
Ground. Active LOW reset output. Power supply input. No connection
Low Power, 5V/3.3V, P Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
2 of 11
March 2005
rev 1.3
ASM1233D-L/D/M
Application Information
Operation - Power Monitor The ASM1233D-L/1233D/1233M detects out-of-tolerance power supply conditions. It resets a processor during powerup, power-down and generates a reset to the system processor when the monitored power supply voltage is below detected, the RESET signal is asserted. On power-up, RESET is kept active (LOW) for approximately 350ms after the power supply voltage has reached the selected tolerance. This allows the power supply and microprocessor to stabilize before RESET is released. the reset threshold. When an out-of-tolerance VCC voltage is
VCC VHTL VCCTP
tF
VLTL
RESET
tRPD
VOL
tR VHTL VLTL VCCTP
Figure 2: Timing Diagram: Power-Down
VCC
tRPU
VOH
RESET
Figure 1: Timing Diagram: Power-Up
~ ~
3 of 11
~ ~ ~ ~
Low Power, 5V/3.3V, P Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
March 2005
rev 1.3
ASM1233D-L/D/M
Absolute Maximum Ratings
Parameter Voltage on VCC Voltage on RESET Operating Temperature Range Soldering Temperature (for 10 sec) Storage Temperature ESD rating HBM MM 2 200 KV V -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/3.3V, P Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
4 of 11
March 2005
rev 1.3
ASM1233D-L/D/M
Electrical Characteristics
Unless otherwise noted, VCC = 5V+10% and specifications are over the operating temperature range of -40C to +85C. All voltages are referenced to ground. Parameter Supply Voltage Output Voltage Output Current Operating Current Symbol VCC VOL VOH IOL ICC VCC < =3.6V, RESET output open ASM1233D-LZ-5 ASM1233D-LZ-10 ASM1233D-LZ-15 ASM1233DZ-5 VCC Trip Point VCCTP 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 Internal Pull-up Resistor Output Capacitance VCC Detect to RESET Low VCC Detect to RESET High VCC Slew Rate (VHTL - VLTL) VCC Slew Rate (VLTL - VHTL) RP COUT tRPD tRPU tF tR ASM1233D-L, ASM1233M ASM1233D 200 250 300 0 2 350 350 3.5 5.0 2.98 2.8 2.64 4.5 4.25 4.0 4.25 4.5 2.64 6 3.06 2.88 2.72 4.625 4.375 4.125 4.375 4.625 2.72 15 3.15 2.97 2.8 4.74 4.49 4.24 4.49 4.75 2.8 4.75 3.14 3.06 4.00 2.48 2.3 7.5 10 10 500 450 k pF s ms s ns V V V RESET asserted IOUT < 500 A Output = 0.4V VCC < 5.5V, RESET output open Conditions Min 1.2 VCC-0.5V 8 8 20 A VCC-0.1V Typ Max 5.5 0.4 V mA Unit V
Voltage High Trip Level
VHTL
Voltage Low Trip Level
VLTL
Note: A 1k resistor maybe required in some applications for proper operation of the microprocessor reset control circuit.
Low Power, 5V/3.3V, P Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
5 of 11
March 2005
rev 1.3
ASM1233D-L/D/M
Family Selection Guide
Part # ASM1810 ASM1811 ASM1812 ASM1815 ASM1816 ASM1817 ASM1233D ASM1233M ASM1233D-L
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 3.06, 2.880, 2.720
RESET Time (ms) 150 150 150 150 150 150 350 350 350
Output Stage Push-Pull Open-Drain Push-Pull Push-Pull Open-Drain Push-Pull Open-Drain Open-Drain Open-Drain
RESET Polarity LOW LOW HIGH LOW LOW HIGH LOW LOW LOW
Low Power, 5V/3.3V, P Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
6 of 11
March 2005
rev 1.3
ASM1233D-L/D/M
Package Information
SOT-223
Dimensions in Inches Symbol Min A A1 B B1 C D E e e1 H L L2 0 0.264 0.036 MIN 0.0024 MIN 6 0.061 0.0008 0.024 0.114 0.009 0.248 0.130 0.090BSC 0.181 BSC 0.287 Max 0.071 0.004 0.031 0.122 0.013 0.264 0.146
Dimensions in millimeters Min 1.55 0.02 0.60 2.90 0.24 6.30 3.30 2.30 BSC 4.60 BSC 6.70 0.91 MIN 0.06 BSC 0 6 7.30 Max 1.80 0.10 0.80 3.10 0.32 6.70 3.70
Low Power, 5V/3.3V, P Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
7 of 11
March 2005
rev 1.3
Plastic SO-8 (8-Pin)
ASM1233D-L/D/M
E
H
D
A2
A
e B A 1
C L
Dimensions in Inches Min Max
Dimensions in Millimeters Min Max
Plastic SO-8 (8-Pin) A A1 A2 B C D E e H L 0.053 0.004 0.049 0.012 0.007 0.069 0.010 0.059 0.020 0.010 1.35 0.10 1.25 0.31 0.18 4.90 BSC 3.91 BSC 1.27 BSC 6.00 BSC 0.41 0 1.27 8 1.75 0.25 1.50 0.51 0.25
0.193 BSC 0.154 BSC 0.050 BSC 0.236 BSC 0.016 0 0.050 8
D
Low Power, 5V/3.3V, P Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
8 of 11
March 2005
rev 1.3
To-92 (3-Pin)
ASM1233D-L/D/M
Dimensions in Inches Min Max TO-92 A b C D E e e1 j L s 0.175 0.016 0.014 0.175 0.138 0.098 0.045 0.168 0.500 0.095 0.185 0.020 0.016 0.185 0.144 0.102 0.055 0.174 0.585 0.099
Dimensions in Millimeters Min Max
4.445 0.406 0.356 4.445 3.505 2.489 1.143 4.269 12.7 2.413
4.699 0.508 0.406 4.699 3.658 2.591 1.397 4.420 14.86 2.515
Low Power, 5V/3.3V, P Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
9 of 11
March 2005
rev 1.3
ASM1233D-L/D/M
Ordering Information
RESET Output Voltage Open Drain Output Stage*
Part Number**
RESET Tolerance
RESET Time
RESET Polarity
Package
Package Marking
TIN - LEAD DEVICES ASM1233D-L-5 ASM1233D-L-10 ASM1233D-L-15 ASM1233D-LZ-5 ASM1233D-LZ-10 ASM1233D-LZ-15 ASM1233D-5 ASM1233D-10 ASM1233D-15 ASM1233DZ-5 ASM1233DZ-10 ASM1233DZ-15 ASM1233M-55 ASM1233M-5 ASM1233M-3 ASM1233MS-55 ASM1233MS-5 ASM1233MS-3 LEAD FREE DEVICES ASM1233D-L-5F ASM1233D-L-10F ASM1233D-L-15F ASM1233D-LZ-5F ASM1233D-LZ-10F ASM1233D-LZ-15F ASM1233D-5F ASM1233D-10F ASM1233D-15F ASM1233DZ-5F ASM1233DZ-10F ASM1233DZ-15F ASM1233M-5F ASM1233M-55F ASM1233M-3F ASM1233MS-5F ASM1233MS-55F ASM1233MS-3F
3.06 2.88 2.72 3.06 2.88 2.72 4.625 4.375 4.125 4.625 4.375 4.125 4.625 4.375 2.72 4.625 4.38 2.72 3.06 2.88 2.72 3.06 2.88 2.72 4.625 4.375 4.125 4.625 4.375 4.125 4.375 4.625 2.72 4.38 4.625 2.72
5% 10% 15% 5% 10% 15% 5% 10% 15% 5% 10% 15% 5% 10% 15% 5% 10% 15% 5% 10% 15% 5% 10% 15% 5% 10% 15% 5% 10% 15% 5% 10% 15% 5% 10% 15%
350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms 350 ms
LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW LOW
3L TO-92 3L TO-92 3L TO-92 4L SOT-223 4L SOT-223 4L SOT-223 3L TO-92 3L TO-92 3L TO-92 4L SOT-223 4L SOT-223 4L SOT-223 3L TO-92 3L TO-92 3L TO-92 8L SOIC 8L SOIC 8L SOIC 3L TO-92 3L TO-92 3L TO-92 4L SOT-223 4L SOT-223 4L SOT-223 3L TO-92 3L TO-92 3L TO-92 4L SOT-223 4L SOT-223 4L SOT-223 3L TO-92 3L TO-92 3L TO-92 8L SOIC 8L SOIC 8L SOIC
ASM1233D-L-5 ASM1233D-L-10 ASM1233D-L-15 RVLL RWLL RXLL ASM1233D-5 ASM1233D-10 ASM1233D-15 RSLL RTLL RULL ASM1233M-55 ASM1233M-5 ASM1233M-3 ASM1233MS-55 ASM1233MS-5 ASM1233MS-3 ASM1233D-L-5F ASM1233D-L-10F ASM1233D-L-15F KVLL KWLL KXLL ASM1233D-5F ASM1233D-10F ASM1233D-15F KSLL KTLL KULL ASM1233M-5F ASM1233M-55F ASM1233M-3F ASM1233MS-5F ASM1233MS-55F ASM1233MS-3F 10 of 11
Low Power, 5V/3.3V, P Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
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 (c) Alliance Semiconductor All Rights Reserved Part Number: ASM1233D-L/D/M Document Version: 1.3
(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. 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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