ISL88042

Manufacturer Part NumberISL88042
DescriptionQuadruple Voltage Monitor
ManufacturerIntersil Corporation
ISL88042 datasheet
 


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®
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
detection circuitry protects the user’s system from
DD
low voltage conditions, resetting the system when V
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
1
MR
EPAD
V
2
DD
www.DataSheet4U.com
V2MON
3
(GND)
4
GND
Ordering Information
PART NUMBER
(Notes 1, 2)
MARKING
ISL88042IRTHFZ-T
4P6
ISL88042IRTHFZ-TK
4P6
ISL88042IRTEEZ-T
2P9
ISL88042IRTEEZ-TK
2P9
ISL88042IRTJJZ-T
2P8
ISL88042IRTJJZ-TK
2P8
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
1
Data Sheet
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
• Immune to Power-Supply Transients
or
DD
• 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
8
RST
• Multi-Voltage Systems
7
V
DDA
6
V4MON
5
V3MON
PART
V
V
TH1
TH2
(V)
(V)
4.60
3.09
4.60
3.09
2.87
2.95
2.87
2.95
2.78
2.86
2.78
2.86
.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
ISL88042
June 8, 2009
= 1V
DD
PACKAGE
TEMP RANGE
Tape & Reel
(°C)
(Pb-free)
-40 to +85
8 Ld TDFN
-40 to +85
8 Ld TDFN
-40 to +85
8 Ld TDFN
-40 to +85
8 Ld TDFN
-40 to +85
8 Ld TDFN
-40 to +85
8 Ld TDFN
.
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2008, 2009. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
FN6655.1
PKG.
DWG. #
L8.2x3A
L8.2x3A
L8.2x3A
L8.2x3A
L8.2x3A
L8.2x3A

ISL88042 Summary of contents

  • Page 1

    ... This device combines popular functions such as Power-On Reset, Undervoltage Supply Supervision, reset signaling and Manual Reset. Monitoring four different supplies 2x3 TDFN package, the ISL88042 devices can help to lower system cost, reduce board space requirements, and increase the reliability of multi-voltage systems ...

  • Page 2

    ... Functional Block Diagram V2MON www.DataSheet4U.com 2 ISL88042 PIN NAME MR Active-Low open drain manual reset input with internal pull-up resistor V Chip Bias Input and primary integrated preset undervoltage monitor DD V2MON Secondary integrated preset undervoltage monitor input GND Ground V3MON ...

  • Page 3

    ... TH1HYST TH1 www.DataSheet4U.com V Fixed Voltage Trip Point for V2MON TH2 V Hysteresis of V TH2HYST TH2 V ISL88042IRTHFZ, ISL88042IRTEEZ REF Adj. Reset Threshold Voltage V ISL88042IRTJJZ Adj. Reset Threshold Voltage V REF V Hysteresis Voltage REFHYST RESET V Reset Output Voltage Low Reset Asserted Delay RPD TH 3 ...

  • Page 4

    ... RST output to go low when the voltage on V2MON falls below V . TH2 V3MON, and V4MON The VxMON inputs provide monitoring and UV compliance of three additional voltages through resistor dividers. A reset is issued on the ISL88042 if the voltage on any VxMON falls below the internal V of 0.6V. REF 4 ISL88042 TEST CONDITIONS V3MON, V4MON < ...

  • Page 5

    ... Power-On Reset (POR) Applying power to the ISL88042 activates a POR circuit, which makes the reset pin(s) active (i.e. RST goes high while RST goes low). These signals provide several benefits: • They prevent the system microprocessor from starting to operate with insufficient voltage. ...

  • Page 6

    ... With adequate bias on the two preset and the two adjustable monitor inputs the RST output will release to pull high indicating that all supplies are compliant for a minimum For the ISL88042EVAL1Z as shipped, the V POR V2MON nominal thresholds are as previously noted with the voltage thresholds being monitored by V3MON and V4MON being left open for programming via the non populated resistor dividers ...

  • Page 7

    ... No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 7 ISL88042 RPD RST RST VDD V4MON R5 V4MON OPEN R3 V3MON OPEN V3MON A FIGURE 10. ISL88042EVAL1Z SCHEMATIC AND PHOTOGRAPH t = 94ms POR 20ms/DIV FIGURE 9. ISL88042 t POR V4 V3 RST 1V/DIV VMON = 0.5V/DIV FN6655.1 June 8, 2009 ...

  • Page 8

    ... Package Outline Drawing L8.2x3A 8 LEAD THIN DUAL FLAT NO-LEAD PLASTIC PACKAGE WITH E-PAD Rev 1, 06/09 6 PIN 1 INDEX AREA (4X) 0.15 TOP VIEW PACKAGE OUTLINE www.DataSheet4U.com TYPICAL RECOMMENDED LAND PATTERN 8 ISL88042 6 2.00 PIN #1 INDEX AREA A B (8x0.25) (6x0.50) 0.05 (8x0.40) (8x0.20) 1.65 2.00 NOTES 0.25 0.50 (8x0.40) 1 ...