廬
X80120, X80121
Data Sheet
January 20, 2005
FN8151.0
PRELIMINARY
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 鈥渂rown out鈥?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鈥檚 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.
Features
鈥?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.
鈥?Fault Detection Register
- Remote diagnostics of voltage fail event.
鈥?Debounced Manual Reset Input
鈥?Manufacturing/Configuration Memory
- 2Kbits of EEPROM
- 400kHz SMBus interface
鈥?Available Packages
- 20-lead Quad No-Lead Frame (QFN - 5x5mm)
Applications
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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
Pinout
QFN PACKAGE
(Top view)
V
CC
V
SS
NC
A0
MR
15
14
(5mm x 5mm)
13
12
11
6
7
8
9 10
20 19 18 17 16
V4GDO
V4MON
DNC
V
CC
DNC
1
2
3
4
5
WP
RESET
V1GDO
V1MON
SCL
Ordering Information
V
CC
DNC
A1
SDA
V
P
PART
NUMBER
X80120Q20I
X80121Q20I
V
TRIP1
4.5
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.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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