1
®
FN6655.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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ISL88042
Quadruple Voltage Monitor
The ISL88042 is a Quadruple 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 four different
supplies in a 8 Ld 2x3 TDFN package, the ISL88042 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.
Two of the four voltage monitors have preset thresholds for
either dual 3.3V or one each for one 5V and one 3.3V
supplies. Users can adjust the threshold voltages of the third
and fourth voltage monitors in order to meet specific system
level requirements.
Pinout
ISL88042
(8 LD TDFN)
TOP VIEW
Features
• Quadruple Voltage Monitoring
• Fixed-Voltage Options Allow Precise Monitoring of +5.0V
and +3.3V Power Supplies
• Two Adjustable Voltage Inputs Monitor Voltages > 0.6V
• 95ms Nominal Reset Pulse Width
• Manual Reset Capability
• Reset Signals Valid Down to V
DD
= 1V
• Immune to Power-Supply Transients
• Low 22µA 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
V
DDA
V4MON
V3MON
MR
EPAD
(GND)
Ordering Information
PART NUMBER
(Notes 1, 2)
PART
MARKING
V
TH1
(V)
V
TH2
(V)
TEMP RANGE
(°C)
PACKAGE
Tape & Reel
(Pb-free)
PKG.
DWG. #
ISL88042IRTHFZ-T 4P6 4.60 3.09 -40 to +85 8 Ld TDFN L8.2x3A
ISL88042IRTHFZ-TK 4P6 4.60 3.09 -40 to +85 8 Ld TDFN L8.2x3A
ISL88042IRTEEZ-T 2P9 2.87 2.95 -40 to +85 8 Ld TDFN L8.2x3A
ISL88042IRTEEZ-TK 2P9 2.87 2.95 -40 to +85 8 Ld TDFN L8.2x3A
ISL88042IRTJJZ-T 2P8 2.78 2.86 -40 to +85 8 Ld TDFN L8.2x3A
ISL88042IRTJJZ-TK 2P8 2.78 2.86 -40 to +85 8 Ld TDFN L8.2x3A
NOTES:
1.
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 July 26, 2010
