IMP IMP708SESA, IMP708SCUA, IMP708SCSA, IMP708SCPA, IMP708RESA Datasheet

©

1999 IMP, Inc. 408-432-9100/www.impweb.com

1

Key Features

Applications

◆ Computers and controllers

◆ CTI applications

◆ Embedded controllers

◆ Battery operated systems

◆ Intelligent instruments

◆ Wireless communication systems

◆ PDAs and handheld equipment

◆

Lower power, pin compatible replacements for
Maxim MAX706P/R/S/T, MAX708R/S/T

– 30% lower supply current:140µA vs. 200µA

◆

Precision power supply monitor

– 2.63V threshold (IMP706P/R, IMP708R)
– 2.93V threshold (IMP706S, IMP708S)
– 3.08V threshold (IMP706T, IMP708T)
– New 4.00V threshold (IMP706J, IMP708J)

◆

Debounced manual reset input

◆

Auxiliary voltage monitor comparator

– 1.25V threshold
– Battery monitor/auxiliary supply monitor

◆

Watchdog timer (IMP706P/R/S/T/J)
– Watchdog can be disabled by floating WDI

◆

200ms reset time delay

◆

Three reset signal options

– Active HIGH: IMP706P
– Active LOW: IMP706R/S/T/J
– Active HIGH & LOW outputs: IMP708R/S/T/J

◆

DIP, SO and MicroSO packages

◆

Guaranteed RESET assertion to VCC= 1.1V

Block Diagrams

IMP706P/R/S/T/J, IMP708R/S/T/J

IMP706P/R/S/T/J, IMP708R/S/T/J

POWER MANAGEMENT

3/3.3/4.0V

3/3.3/4.0V µµ

P Super

P Super

visor Cir

visor Cir

cuits

cuits

– Lo

– Lo

w suppl

w suppl

y cur

y currr

ent

ent

– W

– W

atc

atc

hdog timer

hdog timer

– Br

– Broo

wnout det

wnout det

ection

ection

The IMP706P/R/S/T/J and IMP708R/S/T/J CMOS supervisor circuits
monitor power-supply and battery voltage level, and µP/µC operation.
A reset is generated when the supply drops below 2.63V (IMP706P/R,
IMP708R), 2.93V (IMP706S, IMP708S), 3.08V (IMP706T, IMP708T) or 4.00
(IMP706J, IMP708J).

The family offers several functional options. Each device generates a
reset signal during power-up, power-down and during brownout
conditions.

In addition, the IMP706P/R/S/T/J feature a 1.6 second watchdog timer.
The watchdog timer output will trigger a reset if connected to MR.
Unlike competitive devices, floating the WDI input pin disables the
watchdog timer.

The IMP708R/S/T/J have both active-HIGH and active-LOW reset out­puts but no watchdog function. The IMP706P has the same pin-out and
functions as the IMP706R but has an active-HIGH reset output.

A versatile power-fail circuit, useful in checking battery levels and
non-5V supplies, has a 1.25V threshold. All devices have a manual
reset input.

All devices are available in 8-pin DIP, SO and the compact MicroSO
packages. The MicroSO package requires 50% less PC board area than
the conventional SO package.

WDI

MR

V

PFI

V

CC

20kΩ

CC

+

IMP706P/R/S/T/J

Transition

Detector

+

–

2.63V (IMP706P/R)

2.93V (IMP706S)

3.08V (IMP706T)

4.00V (IMP706J)

Watchdog

Timebase

Generator

1.25V

Timer

RESET

WDO

RESET
(RESET) IMP706P

+

–

GND

PFO

706P_01.eps

V

CC

20kΩ

V

MR

PFI

CC

+

+

–

2.63V (IMP708R)

2.93V (IMP708S)

3.08V (IMP708T)

4.00V (IMP708J)

IMP708R/S/T/J

RESET

Generator

1.25V

RESET

RESET

+

–

GND

PFO

706P_02.eps

2

408-432-9100/www.impweb.com

©

1999 IMP, Inc.

Ordering Information

Pin Configuration

IMP706P/R/S/T/J, IMP708R/S/T/J

IMP706P/R/S/T/J, IMP708R/S/T/J

IMP708R/S/T/J

1

2

3

4

MR

V

CC

GND

PFI

RESET

RESET

NC

PFO

8

7

6

5

IMP706P

1

2

3

4

MR

V

CC

GND

PFI

WDO

RESET

WDI

PFO

8

7

6

5

IMP706R/S/T/J

1

2

3

4

MR

V

CC

GND

PFI

WDO

RESET

WDI

PFO

8

7

6

5

IMP706P

IMP706R/S/T/J

1

2

3

4

(RESET) RESET
(IMP706P)

WDO

MR

V

CC

WDI

PFO

PFI

GND

8

7

6

5

IMP708R/S/T/J

1

2

3

4

RESET

RESET

MR

V

CC

NC

PFO

PFI

GND

8

7

6

5

706P_03.eps

DIP/SO

MicroSO

Operating

Part Number Package Temperature Range Reset Threshold Reset Polarity Watchdog Timer

IMP706PCPA 8-Plastic DIP 0°C to +70°C 2.63 HIGH YES
IMP706PCSA 8-SO 0°C to +70°C 2.63 HIGH YES
IMP706PCUA 8-MicroSO 0°C to +70°C 2.63 HIGH YES
IMP706PEPA 8-Plastic DIP –40°C to +85°C 2.63 HIGH YES
IMP706PESA 8-SO –40°C to +85°C 2.63 HIGH YES
IMP706RCPA 8-Plastic DIP 0°C to +70°C 2.63 LOW YES
IMP706RCSA 8-SO 0°C to +70°C 2.63 LOW YES
IMP706RCUA 8-MicroSO 0°C to +70°C 2.63 LOW YES
IMP706REPA 8-Plastic DIP –40°C to +85°C 2.63 LOW YES
IMP706RESA 8-SO –40°C to +85°C 2.63 LOW YES
IMP706SCPA 8-Plastic DIP 0°C to +70°C 2.93 LOW YES
IMP706SCSA 8-SO 0°C to +70°C 2.93 LOW YES
IMP706SCUA 8-MicroSO 0°C to +70°C 2.93 LOW YES
IMP706SEPA 8-Plastic DIP –40°C to +85°C 2.93 LOW YES
IMP706SESA 8-SO –40°C to +85°C 2.93 LOW YES
IMP706TCPA 8-Plastic DIP 0°C to +70°C 3.08 LOW YES
IMP706TCSA 8-SO 0°C to +70°C 3.08 LOW YES
IMP706TCUA 8-MicroSO 0°C to +70°C 3.08 LOW YES
IMP706TEPA 8-Plastic DIP –40°C to +85°C 3.08 LOW YES
IMP706TESA 8-SO –40°C to +85°C 3.08 LOW YES
IMP706JCPA 8-Plastic DIP 0°C to +70°C 4.00 LOW YES
IMP706JCSA 8-SO 0°C to +70°C 4.00 LOW YES
IMP706JCUA 8-MicroSO 0°C to +70°C 4.00 LOW YES
IMP706JEPA 8-Plastic DIP –40°C to +85°C 4.00 LOW YES
IMP706JESA 8-SO –40°C to +85°C 4.00 LOW YES
IMP708RCPA 8-Plastic DIP 0°C to +70°C 2.63 Dual: HIGH & LOW NO
IMP708RCSA 8-SO 0°C to +70°C 2.63 Dual: HIGH & LOW NO
IMP708RCUA 8-MicroSO 0°C to +70°C 2.63 Dual: HIGH & LOW NO
IMP708REPA 8-Plastic DIP –40°C to +85°C 2.63 Dual: HIGH & LOW NO
IMP708RESA 8-SO –40°C to +85°C 2.63 Dual: HIGH & LOW NO
IMP708SCPA 8-Plastic DIP 0°C to +70°C 2.93 Dual: HIGH & LOW NO
IMP708SCSA 8-SO 0°C to +70°C 2.93 Dual: HIGH & LOW NO
IMP708SCUA 8-MicroSO 0°C to +70°C 2.93 Dual: HIGH & LOW NO
IMP708SEPA 8-Plastic DIP –40°C to +85°C 2.93 Dual: HIGH & LOW NO
IMP708SESA 8-SO –40°C to +85°C 2.93 Dual: HIGH & LOW NO
IMP708TCPA 8-Plastic DIP 0°C to +70°C 3.08 Dual: HIGH & LOW NO
IMP708TCSA 8-SO 0°C to +70°C 3.08 Dual: HIGH & LOW NO
IMP708TCUA 8-MicroSO 0°C to +70°C 3.08 Dual: HIGH & LOW NO
IMP708TEPA 8-Plastic DIP –40°C to +85°C 3.08 Dual: HIGH & LOW NO
IMP708TESA 8-SO –40°C to +85°C 3.08 Dual: HIGH & LOW NO
IMP708JCPA 8-Plastic DIP 0°C to +70°C 4.00 Dual: HIGH & LOW NO
IMP708JCSA 8-SO 0°C to +70°C 4.00 Dual: HIGH & LOW NO
IMP708JCUA 8-MicroSO 0°C to +70°C 4.00 Dual: HIGH & LOW NO
IMP708JEPA 8-Plastic DIP –40°C to +85°C 4.00 Dual: HIGH & LOW NO
IMP708JESA 8-SO –40°C to +85°C 4.00 Dual: HIGH & LOW NO

Pin Terminal Voltage with Respect to Ground

V

CC

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 6.0V

All other inputs . . . . . . . . . . . . . . . . . . . . . . . . – 0.3V to (V

CC

+ 0.3V)

Input Current at V

CC

and GND . . . . . . . . . . 20mA

Output Current: All outputs . . . . . . . . . . . . . 20mA

Rate of Rise at V

CC

. . . . . . . . . . . . . . . . . . . . . 100V/µs

Plastic DIP Power Dissipation . . . . . . . . . . . 700mW

(Derate 9mW/°C above 70°C)

SO Power Dissipation . . . . . . . . . . . . . . . . . . 470mW

(Derate 5.9mW/°C above 70°C)

MicroSO Power Dissipation . . . . . . . . . . . . . 330mW

(Derate 4.1mW/°C above 70°C)

Operating Temperature Range

IMP706xE, IMP708xE . . . . . . . . . . . . . . . . . . – 40°C to +85°C

IMP706xC, IMP708xC . . . . . . . . . . . . . . . . . . 0°C to +70°C

Storage Temperature Range . . . . . . . . . . . . . . –65°C to +160°C

Lead Temperature Soldering (10 sec) . . . . . . 300°C

These are stress ratings only and functional operation is not implied.
Exposure to absolute maximum ratings for prolonged time periods may
affect device reliability.

©

1999 IMP, Inc. 408-432-9100/www.impweb.com

3

IMP706P/R/S/T/J, IMP708R/S/T/J

IMP706P/R/S/T/J, IMP708R/S/T/J

Absolute Maximum Ratings

Electrical Characteristics

Unless otherwise noted, specifications are over the operating temperature range and VCCsupply voltages are 2.7V to 5.5V (IMP706P,
IMP708R), 3.0V to 5.5V (IMP706/8S), 3.15V to 5.5V (IMP706/8T) and 4.1V to 5.5V (IMP706/8J).

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