X80120 Datasheet, PDF (1/17 Pages) Intersil Corporation – Voltage Supervisor/Sequencer Dual Programmable Time Delay with Local/Remote Voltage Monitors

®
PRELIMINARY
Data Sheet
X80120, X80121
January 20, 2005
FN8151.0
Voltage Supervisor/Sequencer
Dual Programmable Time Delay with
Local/Remote Voltage Monitors
The X80120 is a voltage supervisor/sequencer with two built
in voltage monitors. This allows the designer to monitor up to
two voltages and sequence up to three events.
Low voltage detection circuitry protects the system from
power supply failure or “brown out” conditions, resetting the
system and resequencing the voltages when any of the
monitored inputs fall below the minimum threshold level. The
RESET pin is active until all monitored voltages reach proper
operating levels and stabilize for a selectable period of time.
Five common low voltage combinations are available,
however, Intersil’s unique circuits allow the any voltage
monitor threshold to be reprogrammed for special needs or
for applications requiring higher precision.
A manual reset input provides debounce circuitry for
minimum reset component count. Activating the manual
reset both controls the RESET output and resequences the
supplies through control of the ViGDO pins.
The X80120 has 2kb of EEPROM for system configuration,
manufacturing or maintenance information. This memory is
protected to prevent inadvertent changes to the contents.
Pinout
QFN PACKAGE
(Top view)
V4GDO
V4MON
DNC
V_CC
DNC
20 19 18 17 16
1
15
2
14
3 ^{(5mm x 5mm)} ₁₃
4
12
5
11
6 7 8 9 10
WP
RESET
V1GDO
V1MON
SCL
Features
• Dual Voltage Monitor and Sequencing
- Two independent voltage monitors
- Two time delay circuits (in circuit programmable)
- Remote delay via SMBus
- Programmable voltage thresholds and delay times
- Sequence up to 3 power supplies.
• Fault Detection Register
- Remote diagnostics of voltage fail event.
• Debounced Manual Reset Input
• Manufacturing/Configuration Memory
- 2Kbits of EEPROM
- 400kHz SMBus interface
• Available Packages
- 20-lead Quad No-Lead Frame (QFN - 5x5mm)
Applications
• General Purpose Timers
• Long Time Delay Generation
• Cycle Timers / Waveform Generation
• ON/OFF Delay Timers
• Supply Sequencing for Distributed Power
• Programmable Delay Event Sequencing
• Multiple DC-DC ON/OFF Sequencing
• Voltage Window Monitoring with Reset
• ON/OFF switches with Programmable Delay
• Voltage Supervisor with Programmable Output Delays
• Databus Power Sequencing
• 100ms to 5 secs Selectable Delay Switches
• ATE or Data Acquisition Timing Applications
• Datapath/Memory Timing Applications
• Data Pipeline Timing Applications
• Batch Timer/Sequencers
• Adjustable Duty Cycle Applications
Ordering Information
PART
NUMBER
X80120Q20I
V_TRIP1
4.5
X80121Q20I
3.0
V_TRIP4
0.9
0.9
PACKAGE
QFN
QFN
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Copyright Intersil Americas Inc. 2005. All Rights Reserved
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