X80140 Datasheet, PDF (1/18 Pages) Intersil Corporation – Voltage Supervisor/Sequencer Quad Programmable Time Delay with Local/Remote Voltage Monitors

®
PRELIMINARY
X80140, X80141, X80142, X80143, X80144
Data Sheet
January 20, 2005
FN8153.0
Voltage Supervisor/Sequencer
Quad Programmable Time Delay with
Local/Remote Voltage Monitors
The X80140 is a voltage supervisor/sequencer with four built
in voltage monitors. This allows the designer to monitor up to
four voltages and sequence up to five 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 X80140 has 2kb of EEPROM for system configuration,
manufacturing or maintenance information. This memory is
protected to prevent inadvertent changes to the contents.
Pinout
5X5 QFN
TOP VIEW
V4GDO
V4MON
V3GDO
V3MON
V2GDO
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
• Quad Voltage Monitor and Sequencing
- Four independent voltage monitors
- Four time delay circuits (in circuit programmable)
- Remote delay via SMBus
- Factory programmable voltage thresholds
- Sequence up to 5 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
• 100 ms 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
X80140Q20I
V_REF1
4.5
V_REF2
3.0
V_REF3
2.25
V_REF4 PACKAGE
0.9
QFN
X80141Q20I 4.5
2.25
0.9
0.9
X80142Q20I 3.0
2.25
1.7
0.9
X80143Q20I 3.0
2.25
0.9
0.9
X80144Q20I 2.25 2.25
0.9
0.9
QFN
QFN
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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