IMP IMP813LESA, IMP813LEPA, IMP813LCUA, IMP813LCSA, IMP708ESA Datasheet

©

1999 IMP, Inc. 408-432-9100/www.impweb.com 1

Applications

◆ Computers and embedded controllers

◆ Battery-operated systems

◆ Intelligent instruments

◆ Wireless communication systems

◆ PDAs and handheld equipment

Block Diagrams

IMP705/6/7/8, 8

IMP705/6/7/8, 811

3L

3L

POWER MANAGEMENT

Lo

Loww-P-Pooww

er

er µµ

P Super

P Super

visor Cir

visor Cir

cuits

cuits

– W

– W

atc

atc

hdog timer

hdog timer

– Br

– Broo

wnout det

wnout det

ection

ection

– P

– Pooww

er suppl

er suppl

y monit

y monitoror

The IMP705/706/707/708 and IMP813L CMOS supervisor circuits
monitor power-supply and battery voltage level, and µP/µC operation.
Compared to pin-compatible devices offered by Maxim Integrated
Products, IMP devices feature 60 percent lower maximum supply current.

The family offers several functional options. Each device generates a
reset signal during power-up, power-down and during brownout
conditions. A reset is generated when the supply drops below

4.65V (IMP705/707/813L) or 4.40V (IMP706/708). For 3V power supply
applications, refer to the IMP705P/R/S/T data sheet. In addition, the
IMP705/706/813L feature a 1.6 second watchdog timer. The IMP707/708
have both active-HIGH and active-LOW reset outputs but no watchdog
function. The IMP813L has the same pin-out and functions as the IMP705
but has an active-HIGH reset output. A versatile power-fail circuit has a

1.25V threshold, useful in checking battery levels and non-5V supplies. All
devices have a manual reset (MR) input. The watchdog timer output will
trigger a reset if connected to MR.

All devices are available in 8-pin DIP, SO and MicroSO packages.

Key Features

◆ Improved replacements for the Maxim
MAX705/6/7/8, MAX813L
– 140µA maximum supply current
– 60% improvement

◆

Precision power supply monitor
– 4.65V threshold (IMP705/707/813L)
– 4.40V threshold (IMP706/8)

◆

Debounced manual reset input

◆

Voltage monitor
– 1.25V threshold
– Battery monitor/Auxiliary supply monitor

◆

Watchdog timer (IMP705/706/813L)

◆

200ms reset pulse width

◆

Active HIGH reset output (IMP707/708/813L)

◆

MicroSO package

1.25V

Watchdog

Timer

Timebase

RESET

Generator

WDO

V

CC

0.25mA

V

PFI

MR

CC

+

IMP707
IMP708

+

–

4.65V (IMP707)

4.40V (IMP708)

RESET

Generator

1.25V

+

–

GND

RESET
(RESET)
(IMP813L)

+

–

GND

PFO

705_01.eps

RESET

RESET

PFO

705_02.eps

WDI

MR

V

CC

PFI

Transition

Detector

V

CC

0.25mA

+

+

–

4.65V (IMP705/813L)

4.40V (IMP706)

IMP705
IMP706
IMP813L

2

408-432-9100/www.impweb.com

©

1999 IMP, Inc.

IMP705/6/7/8, 8

IMP705/6/7/8, 811

3L

3L

Ordering Information

Pin Configuration

IMP707
IMP708

1

2

3

4

MR

V

CC

GND

PFI

RESET

RESET

NC

PFO

8

7

6

5

IMP707
IMP708

1

2

3

4

RESET

RESET

MR

V

CC

NC

PFO

PFI

GND

8

7

6

5

1

2

3

4

MR

V

CC

GND

PFI

WDO

RESET (RESET)

WDI

PFO

8

7

6

5

IMP705
IMP706

(IMP813L)

IMP705
IMP706

(IMP813L)

1

2

3

4

RESET (RESET)

WDO

MR

V

CC

WDI

PFO

PFI

GND

8

7

6

5

705_03.eps

DIP/SO

MicroSO

Part Number Reset Threshold (V) Temperature Range Pins-Package
IMP705 Active LOW Reset, Watchdog Output and Manual RESET

IMP705CPA 4.65 0°C to +70°C 8-Plastic DIP
IMP705CSA 4.65 0°C to +70°C 8-SO
IMP705CUA 4.65 0°C to +70°C 8-MicroSO
IMP705C/D 4.65 25°C Dice
IMP705EPA 4.65 –40°C to +85°C 8-Plastic DIP
IMP705ESA 4.65 –40°C to +85°C 8-SO
IMP706ESA 4.40 –40°C to +85°C 8-SO

IMP706 Active LOW Reset, Watchdog Output and Manual RESET

IMP706CPA 4.40 0°C to +70°C 8-Plastic DIP
IMP706CSA 4.40 0°C to +70°C 8-SO
IMP706CUA 4.40 0°C to +70°C 8-MicroSO
IMP706C/D 4.40 25°C Dice
IMP706EPA 4.40 –40°C to +85°C 8-Plastic DIP
IMP706ESA 4.40 –40°C to +85°C 8-SO

IMP707 Active LOW & HIGH Reset with Manual RESET

IMP707CPA 4.65 0°C to +70°C 8-Plastic DIP
IMP707CSA 4.65 0°C to +70°C 8-SO
IMP707CUA 4.65 0°C to +70°C 8-MicroSO
IMP707C/D 4.65 25°C Dice
IMP707EPA 4.65 –40°C to +85°C 8-Plastic DIP
IMP707ESA 4.65 –40°C to +85°C 8-SO

IMP708 Active LOW & HIGH Reset with Manual RESET

IMP708CPA 4.40 0°C to +70°C 8-Plastic DIP
IMP708CSA 4.40 0°C to +70°C 8-SO
IMP708CUA 4.40 0°C to +70°C 8-MicroSO
IMP708C/D 4.40 25°C Dice
IMP708EPA 4.40 –40°C to +85°C 8-Plastic DIP
IMP708ESA 4.40 –40°C to +85°C 8-SO

IMP813L Active HIGH Reset, Watchdog Output and Manual RESET

IMP813LCPA 4.65 0°C to +70°C 8-Plastic DIP
IMP813LCSA 4.65 0°C to +70°C 8-SO
IMP813LCUA 4.65 0°C to +70°C 8-MicroSO
IMP813LC/D 4.65 25°C Dice
IMP813LEPA 4.65 –40°C to +85°C 8-Plastic DIP
IMP813LESA 4.65 –40°C to +85°C 8-SO

©

1999 IMP, Inc. 408-432-9100/www.impweb.com 3

IMP705/6/7/8, 8

IMP705/6/7/8, 811

3L

3L

Electrical Characteristics

Absolute Maximum Ratings

Pin Terminal Voltage with Respect to Ground

V

CC

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

All other inputs

1

. . . . . . . . . . . . . . . . . . . . . . . . –0.3V to (VCC+ 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 . . . . . . . . . . . 700 mW

(Derate 9 mW/°C above 70°C)

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

(Derate 5.9 mW/°C above 70°C)

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

(Derate 4.1 mW/°C above 70°C)

Operating Temperature Range

IMP705E/706E/707E/708E/813LE . . . . . . . – 40°C to 85°C

IMP706C/707C/708C/813LC . . . . . . . . . . . 0°C to 70°C

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

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

Note: 1. The input voltage limits on PFI and MR can be exceeded if

the input current is less than 10mA.

These are stress ratings only and functional operation is not implied.

Parameter Symbol Conditions Min Typ Max Units

Operating Voltage Range V

CC

IMP705/6/7/8C 1.2 5.5 V

IMP813L 1.1 5.5

IMP705/6/7/8E, IMP813lE 1.2 5.5

Supply Current I

CC

IMP705C/706C/813LC 75 140 µA
IMP705E, IMP706E, IMP813LE 75 140
IMP707C, IMP708C 50 140
IMP707E, IMP708E 50 140

RESET Threshold V

RT

IMP705, IMP707, IMP813L, Note 2 4.50 4.65 4.75 V

IMP706, IMP708, Note 2 4.25 4.40 4.50
RESET Threshold Hysteresis Note 2 40 mV
RESET Pulse Width t

RS

Note 2 140 200 280 ms
MR Pulse Width t

MR

0.15 µs

MR to RESET Out Delay t

MD

Note 2 0.25 µs
MR Input Threshold V

IH

2.0 V

V

IL

0.8
MR Pull-up Current MR = 0V 100 250 600 µA
RESET Output Voltage I

SOURCE

= 800µAV

CC

- 1.5V V

I

SINK

= 3.2mA 0.4

IMP705/6/7/8, VCC= 1.2V, I

SINK

= 100µA 0.3

RESET Output Voltage IMP707/708/813L, I

SOURCE

= 800µAV

CC

- 1.5V V

IMP707/708, I

SINK

= 1.2mA 0.4

IMP813L, I

SINK

= 3.2mA 0.4

IMP813L, VCC=1.2V, I

SOURCE

= 4µA 0.9

Watchdog Timeout Period t

WD

IMP705/706/813L 1.00 1.60 2.25 s

WDI Pulse Width t

WP

VIL= 0.4V, VIH= 0.8V

CC

50 ns

WDI Input Threshold V

IH

IMP705/706/813L, VCC= 5V 3.5 V

V

IL

0.8
WDI Input Current IMP705/706/813L, WDI = V

CC

50 150 µA

IMP705/706/813L, WDI = 0V –150 – 50

WDO Output Voltage IMP705/706/813L, I

SOURCE

= 800µAV

CC

- 1.5V V

IMP705/706/813L, I

SINK

= 1.2mA 0.4
PFI Input Threshold VCC= 5V 1.2 1.25 1.3 V
PFI Input Current –25 0.01 25 nA
PFO Output Voltage I

SOURCE

= 800µAV

CC

- 1.5V V

I

SINK

= 3.2mA 0.4

Unless otherwise noted, VCC= 4.75V to 5.5V for the IMP705/707/813L. VCC= 4.5V to 5.5V for the IMP706/708 and over the
operating temperature range.

Notes: 2. RESET (IMP705/6/7/8), RESET (IMP707/8, IMP813L)