1
®
FN8227.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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ISL88031
Quintuple Voltage Monitor
The ISL88031 is a quintuple voltage-monitoring supervisor
combining competitive reset threshold accuracy and low
power consumption. This device combines popular functions
such as Power-On Reset, Undervoltage Supply Supervision,
reset signaling and Manual Reset. Monitoring up to five
different voltages in a small 8 Ld MSOP package, the
ISL88031 devices can help to lower system cost, reduce
board space requirements, and increase the reliability of
multi-voltage systems.
Low V
DD
detection circuitry protects the user’s system from
low voltage conditions, resetting the system when V
DD
or
any of the other monitored power supply voltages fall below
their respective minimum voltage thresholds. The reset
signal remains asserted until all of these voltages return to
proper operating levels and stabilize.
With two of the five voltage monitors being preset for
common supplies, users can adjust the threshold voltages of
the third, fourth, and fifth voltage monitors in order to meet
specific system level requirements.
Pinout
ISL88031
(8 LD MSOP)
TOP VIEW
Features
• Quintuple Voltage Monitoring
• Fixed-Voltage Options Allow Precise Monitoring of +5.0V,
+3.3V, +3.0V, +2.5V and +1.8V Power Supplies
• Adjustable Voltage Inputs Monitor Voltages > 0.6V
• 120ms Nominal Reset Pulse Width
• Manual Reset Capability
• Reset Signals Valid Down to V
DD
= 1V
• Accurate ±1.8% Voltage Threshold
• Immune to Power-Supply Transients
• Low 19µA Maximum Supply Current at 5V
• Pb-Free (RoHS Compliant)
Applications
• Telecom and Datacom Systems
• Routers and Servers
• Access Concentrators
• Cable/Satellite Applications
• Desktop and Notebook Computer Systems
• Data Storage Equipment
• Set-Top Boxes
• Industrial Equipment
• Multi-Voltage Systems
1
2
3
4
8
7
6
5
V
DD
V2MON
GND
RST
V5MON
V4MON
V3MON
MR
Ordering Information
PART NUMBER
(Notes 1, 2) PART MARKING V
TH1
V
TH2
TEMP RANGE (°C)
PACKAGE
(Pb-free) PKG. DWG. #
ISL88031IU8HFZ AMA 4.634V 3.078V -40 to +85 8 Ld MSOP M8.118
ISL88031IU8HEZ ANZ 4.634V 2.955V -40 to +85 8 Ld MSOP M8.118
ISL88031IU8HCZ APR 4.634V 2.333V -40 to +85 8 Ld MSOP M8.118
ISL88031IU8HAZ APS 4.634V 1.683V -40 to +85 8 Ld MSOP M8.118
ISL88031IU8ECZ APT 2.866V 2.333V -40 to +85 8 Ld MSOP M8.118
ISL88031IU8EAZ APZ 2.866V 1.683V -40 to +85 8 Ld MSOP M8.118
NOTES:
1. Add “-TK” suffix for tape and reel. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil
Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-
020.
Data Sheet June 9, 2009
