intersil ISL88021, ISL88022 DATA SHEET

®

www.BDTIC.com/Intersil

ISL88021, ISL88022

Data Sheet September 18, 2006

Triple Voltage Monitor with Adjustable
Power-On-Reset and Undervoltage/
Overvoltage Monitoring Capability

The ISL88021 and ISL88022 family of devices are
customizable triple voltage-monitoring supervisors that
assert a reset if any of the monitored voltages becomes
non-compliant. They offer popular functions such as
Power-On-Reset timing control with both RESET and
RESET

outputs, Supply Voltage Supervision, both under or
overvoltage detection, and Manual Reset assertion. By
offering these features i n a sma ll 8 Ld MS OP package, the
ISL88021 and ISL88022 can lower system cost, reduce
board space requirements and increase the reliability of
systems.

Applying a voltage to V
circuit which holds RESET
time. This allows the power supply and system oscillator to
stabilize before the processor can execute code.

Low V

detection circuitry protects the user’s system from

DD

low voltage conditions, resetting the system when V
below its minimum preset voltage threshold V
remains asserted until V
level and stabilizes. Two additional voltage monitoring
inputs, V2MON (preset) and V3MON (adjustable), monitor
other supplies to provide reliable system operation.

The ISL88021 V3MON input monitors for undervoltage (UV)
conditions whereas the ISL88022 V3MON input allows
monitoring for overvoltage (OV) conditions. The monitored
voltage on V3MON on either device is compared via a
resistor divider to a 600mV internal reference. Hence, any
voltage more or less positive than this reference can be
accurately monitored to meet specific system level
requirements or to fine-tune the threshold for applications
requiring higher precision.

These devices also let users increase the Power-On-Reset
time-out delay by connecting a capacitor between C
ground. This lengthens the period of an internal clock
counter thereby increasing the time between voltage
compliance and reset outputs signaling.

activates the Power-On-Reset

DD

low for an adjustable period of

returns to its proper operating

DD

TH1

DD

. Reset

POR

falls

and

FN8226.1

Features

• Triple Voltage Monitor and Reset Assertion

•Low V

Detection and Reset Assertion

DD

- Adjustable Reset Threshold Voltages

- 0.6V ±6mV Over -40°C to +85°C

- Reset Signal Valid to V

DD

= 1V

• 140ms Minimum Reset Pulse Delay that is Customizable
Using an External Capacitor

• Both RST and RST Outputs Available

• Undervoltage/Overvoltage Monitoring Capability

• Low 20µA Consumptio n

• Small 8 Ld MSOP Package

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• Process Control Systems

• Intelligent Instruments

• Embedded Control Systems

• Computer Systems

• Portable/Battery-Powered Equipment

• Multi-Voltage Systems

Pinout

ISL88021, ISL88022

(8 LD MSOP)

TOP VIEW

MR

V

DD

V2MON

GND

1

2

3

4

8

RST

7

RST

6

C

POR

5

V3MON

A manual reset input provides debounce circuitry for
minimum reset component count.

1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

| Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

Copyright Intersil Americas Inc. 2006. All Rights Reserved

ISL88021, ISL88022

www.BDTIC.com/Intersil

Ordering Information (See Notes)

V2MO

V

TRIP2

V3MON

TYPE PACKAGE

PART

NUMBER
ISL88021IU8FAZ ANM 3.09V 1.69V UV 8 Ld MSOP
ISL88021IU8FCZ ANL 3.09V 2.32V UV 8 Ld MSOP

ISL88021IU8FEZ 3.09V 2.92V UV 8 Ld MSOP
ISL88021IU8FFZ 3.09V 3.09V UV 8 Ld MSOP
ISL88021IU8HAZ 4.64V 1.69V UV 8 Ld MSOP
ISL88021IU8HCZ 4.64V 2.32V UV 8 Ld MSOP

ISL88021IU8HEZ ANK 4.64V 2.92V UV 8 Ld MSOP
ISL88021IU8HFZ ANJ 4.64V 3.09V UV 8 Ld MSOP
ISL88022IU8FAZ ANQ 3.09V 1.69V OV 8 Ld MSOP
ISL88022IU8FCZ ANP 3.09V 2.32V OV 8 Ld MSOP

ISL88022IU8FEZ 3.09V 2.92V OV 8 Ld MSOP
ISL88022IU8FFZ 3.09V 3.09V OV 8 Ld MSOP

PART

MARKING

V

V

TRIP1

DD

Block Diagrams

V

DD

RST

RST

Ordering Information (See Notes) (Continued)

V2MO

V

TRIP2

V3MON

TYPE PACKAGE

RST

RST

PART

NUMBER

ISL88022IU8HAZ 4.64V 1.69V OV 8 Ld MSOP
ISL88022IU8HCZ 4.64V 2.32V OV 8 Ld MSOP

ISL88022IU8HEZ ANO 4.64V 2.92V OV 8 Ld MSOP
ISL88022IU8HFZ ANN 4.64V 3.09V OV 8 Ld MSOP

NOTES:

1. Standard versions are shown in bold. For non-standard versions,
please contact factory for availability.

2. Add “-TK” suffix for Tape and Reel.

3. Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are 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.

V

DD

PART

MARKING

V

V

TRIP1

DD

POR

V2MON

V3MON

C

POR

MR

PB

V

REF

±

ISL88021

GND

V2MON

V3MON

V

REF

±

Pin Descriptions

ISL88021 ISL88022 NAME FUNCTION

11 MR
22 V
3 3 V2MON Second Undervoltage Monitor Input
4 4 GND Ground
5 V3MON Undervoltage Monitor Input

5 V3MON Overvoltage Monitor Input
66 C
77 RST
8 8 RST Active-High Push-Pull Reset Output

DD

POR

Active-Low Open Drain Manual Reset Input
Power Supply Input

Set Power-On-Reset Timeout Delay
Active-Low Open Drain Reset Output

POR

ISL88022

GND

C

POR

MR

PB

2

FN8226.1

September 18, 2006

ISL88021, ISL88022

www.BDTIC.com/Intersil

Absolute Maximum Ratings Thermal Information

Temperature Under Bias . . . . . . . . . . . . . . . . . . . . -40C to +85C

Voltage on Any Pin with Respect to GND . . . . . . . . . . .-1.0V to +7V

D.C. Output Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA

Recommended Operating Conditions

Industrial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTE:

is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.

1. θ

JA

Thermal Resistance (Typical, Note 1) θ

MSOP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Maximum Junction Temperature (Plastic Package) . . . . . . .+150°C

Maximum Storage Temperature Range. . . . . . . . . .-65°C to +150°C

Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . .+300°C

(MSOP - Lead Tips Only)

Electrical Specifications Over the recommended operating conditions unless otherwise specified.

SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNITS

V

DD

I

DD1

I

DD2

I

DDA

VOLTAGE THRESHOLDS

V

TH1

V

TH1HYST

V

TH2

V

TH2HYST

V

TH3

V

REFHYST

RESET

V

OL

V

OH

t

RPD

t

POR

C

LOAD

Supply Voltage Range 2.0 5.5 V
V

Supply Current V

DD

V2MON Input Current V2MON = 3.3V 5.5 6 µA
V3MON Input Current V3MON = 1.0V 19 100 nA

Fixed Voltage Trip Point for V

Hysteresis of V

Fixed Voltage Trip Point for V2MON ISL88021/22IU8xFZ 3.034 3.090 3.146 V

Hysteresis of V

V3MON Threshold Voltage VTH for V3MON on ISL88021 0.594 0.605 0.616 V

Hysteresis Voltage 3mV

Reset Output Voltage Low VDD ≥ 3.3V, Sinking 2.5mA 0.05 0.40 V

RST Output Voltage High VDD ≥ 3.3V, Sourcing 2.5mA VDD-0.6 VDD-0.4 V

VTH to Reset Asserted Delay 10 µs
POR Timeout Delay C
Load Capacitance on Reset Pins 5 pF

TH1

TH2

DD

= 5.0V 12.5 15 µA

DD

ISL88021/22IU8HxZ 4.565 4.649 4.733 V
ISL88021/22IU8FxZ 3.029 3.085 3.141 V
V

= 4.64V 46 mV

TH1

V

= 3.09V 37 mV

TH1

ISL88021/22IU8xEZ 2.894 2.947 3.000 V
ISL88021/22IU8xCZ 2.290 2.332 2.374 V
ISL88021/22IU8xAZ 1.660 1.690 1.720 V
V

= 3.09V 37 mV

TH2

V

= 2.92V 29 mV

TH2

V

= 2.32V 23 mV

TH2

= 2.19V 22 mV

V

TH2

V

= 1.69V 17 mV

TH2

for V3MON on ISL88022 0.587 0.595 0.603 V

V

TH

V

< 3.3V, Sinking 1.5mA 0.05 0.40 V

DD

< 3.3V, Sourcing 1.5mA VDD-0.6 VDD-0.4 V

V

DD

is open 140 200 ms

POR

JA

(°C/W)

3

FN8226.1

September 18, 2006