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ASM1834S

Description
Power Supply Support Circuit, Fixed, 2 Channel, PDSO8, SO-8
CategoryPower/power management    The power supply circuit   
File Size251KB,10 Pages
ManufacturerALSC [Alliance Semiconductor Corporation]
Download Datasheet Parametric Compare View All

ASM1834S Overview

Power Supply Support Circuit, Fixed, 2 Channel, PDSO8, SO-8

ASM1834S Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
Parts packaging codeSOIC
package instructionSOP, SOP8,.25
Contacts8
Reach Compliance Codeunknown
ECCN codeEAR99
Adjustable thresholdNO
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeR-PDSO-G8
JESD-609 codee0
length4.9 mm
Number of channels2
Number of functions1
Number of terminals8
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP8,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)NOT SPECIFIED
power supply3.3/5 V
Certification statusNot Qualified
Maximum seat height1.75 mm
Maximum supply current (Isup)0.03 mA
Maximum supply voltage (Vsup)5.5 V
Minimum supply voltage (Vsup)1.2 V
Nominal supply voltage (Vsup)5 V
surface mountYES
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width3.91 mm
Base Number Matches1
October 2003
rev 1.0
ASM1834A/D
Dual 5V and 3.3V µP Power Supply Supervisor with Manual Reset
All devices operate over the extended industrial temperature
range. Devices are available in 8-pin DIP, surface mount 8-pin
SO and 8-Pin MicroSO packages. Die are also available.
General Description
The ASM1834 supervisors simultaneously monitor both 3.3V
and 5V power sources and generate reset signals when either
supply is out of tolerance. When an out-of-tolerance is
detected, the output-reset signal of the affected supply
becomes active and resets the system microprocessor/
microcontroller. On power-up and after the supply voltage
returns to an in-tolerance condition, the reset signal remains
active for approximately 350ms. this allows the power supply
and system microprocessor to stabilize.
Tolerance levels are independently selectable for both supplies.
Tolerance options are 5% and 10% percent for the 5V supply
and 10% and 20% percent for the 3.3V supply.
The ASM1834 and ASM1834D have push-pull reset output
stages. The ASM1834A reset outputs are open drain devices
that can both be connected to either 5V or 3.3V supply. The
ASM1834 and ASM1834A have active LOW reset outputs. The
ASM1834D has active HIGH reset outputs.
All devices can generate reset signals through an internally
debounced pushbutton reset input that affects both reset
outputs.
Key Features
Monitor 5V and 3.3V supplies simultaneously
5V and 3.3V power-on reset
350ms reset time
Debounced pushbutton reset input
Push-pull CMOS output
•ASM1834, ASM1834D
•Eliminates external pull-up resistors
•Active LOW (ASM1834), HIGH (ASM1834D)
Open Drain Output
•ASM1834A
•Active LOW
Selectable 5V and 3.3V trip point tolerance
Internal power drawn from highest input voltage, 5V or
3.3V
Precision temperature-compensated voltage reference and
comparator
Low cost surface mount SO, compact MicroSO and DIP
packages.
Wide operating temperature, -40°C to +85°C
Applications
Microprocessors
PDAs, Hand-held PCs
Embedded Controllers
Telecommunication Systems
Power Supplies
Wireless / Cellular Systems
Networking Hardware
Typical Operating Circuit
3.3V
+5V
ASM1834
5V
IN
3.3V
IN
RESET
PBRST
5VTOL GND 3.3VTOL
3.3V
5V
µP
RESET
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

ASM1834S Related Products

ASM1834S ASM1834 ASM1834DEMA ASM1834EMA
Description Power Supply Support Circuit, Fixed, 2 Channel, PDSO8, SO-8 Power Supply Support Circuit, Fixed, 2 Channel, PDIP8, PLASTIC, DIP-8 Power Supply Support Circuit, Fixed, 2 Channel, PDSO8, MICROSO-8 Power Supply Support Circuit, Fixed, 2 Channel, PDSO8, MICROSO-8
Is it Rohs certified? incompatible incompatible incompatible incompatible
Parts packaging code SOIC DIP SOIC SOIC
package instruction SOP, SOP8,.25 DIP, DIP8,.3 TSSOP, TSSOP8,.19 TSSOP, TSSOP8,.19
Contacts 8 8 8 8
Reach Compliance Code unknown unknown unknown unknown
ECCN code EAR99 EAR99 EAR99 EAR99
Adjustable threshold NO NO NO NO
Analog Integrated Circuits - Other Types POWER SUPPLY SUPPORT CIRCUIT POWER SUPPLY SUPPORT CIRCUIT POWER SUPPLY SUPPORT CIRCUIT POWER SUPPLY SUPPORT CIRCUIT
JESD-30 code R-PDSO-G8 R-PDIP-T8 S-PDSO-G8 S-PDSO-G8
JESD-609 code e0 e0 e0 e0
length 4.9 mm 9.59 mm 3 mm 3 mm
Number of channels 2 2 2 2
Number of functions 1 1 1 1
Number of terminals 8 8 8 8
Maximum operating temperature 85 °C 85 °C 85 °C 85 °C
Minimum operating temperature -40 °C -40 °C -40 °C -40 °C
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SOP DIP TSSOP TSSOP
Encapsulate equivalent code SOP8,.25 DIP8,.3 TSSOP8,.19 TSSOP8,.19
Package shape RECTANGULAR RECTANGULAR SQUARE SQUARE
Package form SMALL OUTLINE IN-LINE SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius) NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
power supply 3.3/5 V 3.3/5 V 1.2/5.5 V 1.2/5.5 V
Certification status Not Qualified Not Qualified Not Qualified Not Qualified
Maximum supply current (Isup) 0.03 mA 0.03 mA 0.03 mA 0.03 mA
Maximum supply voltage (Vsup) 5.5 V 5.5 V 5.5 V 5.5 V
Minimum supply voltage (Vsup) 1.2 V 1.2 V 1.2 V 1.2 V
Nominal supply voltage (Vsup) 5 V 5 V 2.7 V 2.7 V
surface mount YES NO YES YES
Temperature level INDUSTRIAL INDUSTRIAL INDUSTRIAL INDUSTRIAL
Terminal surface Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb)
Terminal form GULL WING THROUGH-HOLE GULL WING GULL WING
Terminal pitch 1.27 mm 2.54 mm 0.65 mm 0.65 mm
Terminal location DUAL DUAL DUAL DUAL
Maximum time at peak reflow temperature NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
width 3.91 mm 7.62 mm 3 mm 3 mm
Maximum seat height 1.75 mm - 1.1 mm 1.1 mm
Base Number Matches 1 1 1 -
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