ASM813LCPA ALSC [Alliance Semiconductor Corporation], ASM813LCPA Datasheet

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ASM813LCPA

Manufacturer Part Number
ASM813LCPA
Description
Low Power UP Supervisor Circuits
Manufacturer
ALSC [Alliance Semiconductor Corporation]
Datasheet
Typical Operating Circuit
July 2004
rev 1.2
General Description
The ASM705 / 706 / 707 / 708 and AS813L are cost effective
CMOS supervisor circuits that monitor power-supply and
battery voltage level, and µP/µC operation.
The family offers several functional options. Each device
generates a reset signal during power-up, power-down and
during brownout conditions. A reset is generated when the
supply drops below 4.65V (ASM705/707/813L) or 4.40V
(ASM706/708). For 3V power supply applications, refer to the
ASM705P/R/S/T data sheet. In addition, the ASM705/706/813L
feature a 1.6 second watchdog timer. The ASM707/708 have
both active-HIGH and active-LOW reset outputs but no
watchdog function. The ASM813L has the same pin-out and
functions as the ASM705 but has an active-HIGH reset output.
A versatile power-fail circuit has a 1.25V threshold, useful in low
battery detection and for monitoring non-5V supplies. All
devices have a manual reset (MR) input. The watchdog timer
output will trigger a reset if connected to MR.
All devices are available in 8-pin DIP, SO and MicroSO
packages.
2575 Augustine Drive . Santa Clara, CA 95054 . Tel: 408.855.4900 . Fax: 408.855.4999 . www.alsc.com
Unregulated DC
R
R
Notice: The information in this document is subject to change without notice
1
2
+5V Regulator
Low Power µP Supervisor Circuits
MR
V
PFI
CC
(ASM813L)
ASM706
Alliance Semiconductor
ASM705
(RESET)
RESET
Features
Applications
WDO
PFO
WDI
Precision power supply monitor
•4.65V threshold (ASM705/707/813L)
•4.40V threshold (ASM706/708)
Debounced manual reset input
Voltage monitor
•1.25V threshold
•Battery monitor / Auxiliary supply monitor
Watchdog timer (ASM705/706/813L)
200ms reset pulse width
Active HIGH reset output (ASM707/708/813L)
MicroSO package
Computers and embedded controllers
Portable/Battery-operated systems
Intelligent instruments
Wireless communication systems
PDAs and hendheld equipment
Automative Systems
Safety Systems
(RESET)
V
RESET
I/O LINE
INTERRUPT
NMI
ASM705 / 706 / 707 / 708
CC
µP
ASM813L

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ASM813LCPA Summary of contents

Page 1

July 2004 rev 1.2 General Description The ASM705 / 706 / 707 / 708 and AS813L are cost effective CMOS supervisor circuits that monitor power-supply and battery voltage level, and µP/µC operation. The family offers several functional options. Each device ...

Page 2

July 2004 rev 1.2 Block Diagrams Transition Watchdog WDI Detector Timer V CC Timebase 0.25mA MR RESET Generator 4.65V (ASM705/813L) 4.40V (ASM706) PFI + ASM705 - 1.25V ASM706 ASM813L Pin Configuration DIP/ ...

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July 2004 rev 1.2 Pin Description Pin Number ASM705/706 ASM707/708 DIP/ DIP/ MicroSO MicroSO ...

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July 2004 rev 1.2 Detailed Description A proper reset input enables microcontroller to start in a known state. ASM70X and ASM813L assert reset to prevent code execution errors during power-up, power-down and brown-out conditions. RESET/RESET Timing The RESET/RESET signals are ...

Page 5

July 2004 rev 1.2 transitions at WDI will reset the watchdog timer and initiate a new countdown sequence. WDO will also become LOW and remain so, whenever the supply voltage falls below the device threshold level. CC WDO ...

Page 6

July 2004 rev 1.2 Monitoring a Negative Voltage The Power-Fail circuitry can also monitor a negative supply rail. When the negative rail is OK, PFO will be LOW, and when the negative rail is failing (not negative enough), PFO goes ...

Page 7

July 2004 rev 1.2 Absolute Maximum Ratings Parameter Pin Terminal Voltage with Respect to Ground All other inputs Input Current at V and GND CC Output Current: All outputs Rate of Rise Plastic DIP ...

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July 2004 rev 1.2 Electrical Characteristics Unless otherwise noted, specifications are over the operating temperature range and V ASM708R), 3 5.5V (ASM706/708S), 3.15V to 5.5V (ASM706/708T) and 4.1V to 5.5.V (ASM706/708J) Parameter Symbol Operating Voltage V CC Range ...

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July 2004 rev 1.2 Parameter Symbol Watchdog Timeout t WD Period t WDI Pulse Width WDI Input Threshold V IL WDI Input Current V OH WDO Output Voltage V OL PFI Input Threshold PFI Input Current V ...

Page 10

July 2004 rev 1.2 Package Dimensions Inches Min Max A - 0.0433 A1 0.0020 0.0059 0.050 A2 0.0295 0.0374 b 0.0098 0.0157 C 0.0051 0.0091 D 0.1142 0.1220 e 0.0256 BSC E 0.193 BSC E1 0.1142 0.1220 ...

Page 11

July 2004 rev 1.2 Package Dimensions (contd Inches Min Max A - 0.210 A1 0.015 - A2 0.115 0.195 b 0.014 0.022 b2 0.045 0.070 b3 0.030 0.045 D 0.355 0.400 D1 0.005 - E 0.300 0.325 ...

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July 2004 rev 1.2 Package Dimensions (contd) Inches Min Max A 0.053 0.069 A1 0.004 0.010 B 0.013 0.020 C 0.007 0.010 e 0.050 E 0.150 0.157 H 0.228 0.244 L 0.016 0.050 D 0.189 0.197 Notice: The information in ...

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... ASM707ESA ASM708Active LOW & HIGH Reset with Manual RESET ASM708CPA ASM708CSA ASM708CUA ASM708EPA ASM708ESA ASM813L Active HIGH Reset, Watchdog Output And Manual RESET ASM813LCPA ASM813LCSA ASM813LCUA ASM813LEPA ASM813LESA Notice: The information in this document is subject to change without notice Temperature Range 4.65 0°C to +70 °C 4.65 0° ...

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July 2004 rev 1.2 Feature Summary ASM705 Power fail detector Brownout detection Manual RESET input Power-up/down RESET Watchdog Timer Active HIGH RESET output Active LOW RESET output RESET Threshold (V) Notice: The information in this document is subject to change ...

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Alliance Semiconductor Corporation 2575, Augustine Drive, Santa Clara, CA 95054 Tel: 408 - 855 - 4900 Fax: 408 - 855 - 4999 www.alsc.com © Copyright 2003 Alliance Semiconductor Corporation. All rights reserved. Our three-point logo, our name and Intelliwatt are ...

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