2002 Microchip Technology Inc.

DS21346B-page 1

Features

· Combines Two Comparators and a Voltage

Reference in a Single Package

· Optimized for Single Supply Operation

· Available in Two Small Packages: 8-Pin SOIC or

8-Pin MSOP

· Ultra Low Input Bias Current: Less than 100pA

· Low Quiescent Current, Operating: 10

A (Typ.)

· Rail-to-Rail Inputs and Outputs

· Operates Down to V

= 1.8V

· Programmable Hysteresis

Applications

· Power Supply Circuits

· Battery Operated Equipment

· Consumer Products

· Replacements for Discrete Components

Device Selection Table

Package Types

General Description

The TC1041 is a mixed-function device combining two
comparators and a voltage reference in a single 8-pin
package. The inverting inputs of both comparators are
internally connected to the reference.

This increased integration allows the user to replace
two packages, which saves space, lowers supply
current and increases system performance. The
TC1041 operates from two 1.5V alkaline cells down to
V

= 1.8V. It requires only 10

A typical supply current

which significantly extends battery life. The TC1041
provides a simple method for adding user-adjustable
hysteresis without feedback or complex external
circuitry. Hysteresis is adjusted with a simple resistor
divider on the HYST pin.

Rail-to-rail inputs and outputs allow operation from low
supply voltages with large input and output signal
swings.

Packaged in an 8-Pin SOIC or 8-Pin MSOP, the
TC1041 is ideal for applications requiring low power
and small packages.

Functional Block Diagram

Part Number

Package

Temperature

Range

TC1041CEOA

8-Pin SOIC

-40°C to +85°C

TC1041CEUA

8-Pin MSOP

-40°C to +85°C

INB-

REF

TC1041CEOA
TC1041CEUA

8-Pin SOIC

8-Pin MSOP

OUTB

INA+

OUTA

HYST

TC1041

OUTB

REF

HYST

INB+

INA+

OUTA

Voltage

Reference

TC1041

Linear Building Block Dual Low Power Comparator and

Voltage Reference with Programmable Hysteresis

TC1041

DS21346B-page 2

2002 Microchip Technology Inc.

1.0

ELECTRICAL
CHARACTERISTICS

ABSOLUTE MAXIMUM RATINGS*

Supply Voltage ......................................................6.0V

Voltage on Any Pin .......... (V

0.3V) to (V

+ 0.3V)

Junction Temperature....................................... +150°C

Operating Temperature Range............. -40°C to +85°C

Storage Temperature Range .............. -55°C to +150°C

*Stresses above those listed under "Absolute Maximum
Ratings" may cause permanent damage to the device. These
are stress ratings only and functional operation of the device
at these or any other conditions above those indicated in the
operation sections of the specifications is not implied.
Exposure to Absolute Maximum Rating conditions for
extended periods may affect device reliability.

TC1041 ELECTRICAL SPECIFICATIONS

Electrical Characteristics: Typical values apply at 25°C and V

= 3.0V. Minimum and maximum values apply for T

= -40° to

+85°C and V

= 1.8V to 5.5V, unless otherwise specified.

Symbol

Parameter

Min

Typ

Max

Units

Test Conditions

Supply Voltage

1.8

5.5

Supply Current Operating

All Outputs Open

Comparators

IN+ Voltage Range

0.2

+ 0.2

Input Offset Voltage

-5
-5

+5
+5

mV
mV

= 3V, T

= 25°C

= -40°C to 85°C (Note 1)

Input Bias Current

±100

= 25°C,

IN+ = V

to V

Output High Voltage

0.3

= 10k

to V

Output Low Voltage

0.3

= 10k

to V

CMRR

Common Mode Rejection Ratio

= 25°C, V

= 5V

= V

to V

PSRR

Power Supply Rejection Ratio

= 25°C

= 1.8V to 5V

SRC

Output Source Current

IN+ = V

Output Shorted to V

= 1.8V

SINK

Output Sink Current

IN+ = V

Output Shorted to V

= 1.8V

HYST

Voltage Range at HYST Pin

REF

0.08

REF

HYST

Hysteresis Input Current

±100

PD1

Response Time

sec

100mV Overdrive, C

= 100pF

PD2

Response Time

sec

10mV Overdrive, C

= 100pF

Voltage Reference

REF

Reference Voltage

1.176

1.200

1.224

REF(SOURCE)

Source Current

REF(SINK)

Sink Current

L(REF)

Load Capacitance

100

VREF

Noise Voltage

RMS

100Hz to 100kHz

VREF

Noise Voltage Density

1.0

1kHz

Note

is measured as (V

+ V

REF

)/2 where V

is the upper hysteresis threshold and V

is the lower hysteresis threshold with

REF

HYST

set to 10mV. This represents the assymetry of the hysteresis thresholds around V

REF

TC1041

DS21346B-page 4

2002 Microchip Technology Inc.

3.0

DETAILED DESCRIPTION

The TC1041 is one of a series of very low power, linear
building block products targeted at low voltage
operation. The TC1041 contains two comparators and
a voltage reference and operates at a minimum supply
voltage of 1.8V with a typical current consumption of
10

Both

comparators

have

programmable

hysteresis.

3.1

Comparator

The TC1041 contains two comparators with program-
mable

hysteresis.

The

inverting

inputs

the

comparators are connected to the output of the voltage
reference, while the range of the non-inverting inputs
extend beyond both supply voltages by 200mV. The
comparator outputs will swing to within several
millivolts of the supplies depending on the load current
being driven.

The comparators exhibit a propagation delay and
supply current which are largely independent of supply
voltage. The low input bias current and offset voltage
make them suitable for high impedance precision
applications.

3.2

Voltage Reference

A 2.0 percent tolerance, internally biased, 1.20V band-
gap voltage reference is included in the TC1041. It has
a push-pull output capable of sourcing and sinking at
least 50

3.3

Programmable Hysteresis

Hysteresis is added to the comparators by connecting
a resistor, R1, between the V

REF

and HYST pins and

another resistor, R2, between the HYST pin and V

For no hysteresis, V

REF

should be directly connected to

HYST. The hysteresis, V

, is equal to twice the

voltage difference between the V

REF

and HYST pins

where:

and is symmetrical around the normal (without
hysterersis)

threshold

the

comparator.

The

maximum voltage allowed between the V

REF

and H

YST

pins is 80mV, giving a maximum hysteresis of 160mV.

FIGURE 3-1:

TC1041 PROGRAMMABLE HYSTERESIS

= 2V

REF

R1/(R1 + R2) (See Figure 3-1)

REF

HYST

TC1041

REF

R1 =

(2) (I

REF

)

R2 =

REF

(

1.2V

)

Note: Size R1 and R2 such that I

REF

50µA

2002 Microchip Technology Inc.

DS21346B-page 5

TC1041

4.0

TYPICAL APPLICATIONS

The TC1041 lends itself to a wide variety of
applications, particularly in battery powered systems. It
typically finds application in power management,
processor supervisory and interface circuitry.

4.1

Precision Battery Monitor

Figure 4-1 is a precision battery low/battery dead
monitoring circuit. Typically, the battery low output
warns the user that a battery dead condition is
imminent. Battery dead typically initiates a forced
shutdown to prevent operation at low internal supply
voltages (which can cause unstable system operation).

The circuit in Figure 4-1 uses a TC1034, a TC1041 and
only six external resistors. AMP 1 is a simple buffer
while CMPTR1 and CMPTR2 provide precision voltage
detection using V

REF

as a reference. Resistors R2 and

R4 set the detection threshold for BATT LOW while
Resistors R1 and R3 set the detection threshold for
BATT FAIL. The component values shown assert
BATT LOW at 2.2V (typical) and BATT FAIL at 2.0V
(typical). Total current consumed by this circuit is
typically 16

A at 3V. Resistors R5 and R6 provide

hysteresis of 116mV for both comparators.

FIGURE 4-1:

PRECISION BATTERY MONITOR

R2, 430k, 1%

R4, 470k, 1%

R3, 470k, 1%

R1, 300k, 1%

REF

To System DC/DC

Converter

Alkaline

TC1041

BATTFAIL

BATTLOW

CMPTR1

CMPTR2

AMP1

TC1034

TC1041

HYST

51k

TC1041

DS21346B-page 6

2002 Microchip Technology Inc.

5.0

TYPICAL CHARACTERISTICS

Note:

The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.

1.5

2.5

3.5

4.5

5.5

SUPPLY VOLTAGE (V)

Comparator Propagation Delay

vs. Supply Voltage

DELAY TO RISING EDGE (

sec)

Overdrive = 10mV

Overdrive = 50mV

1.5

2.5

3.5

4.5

5.5

DELAY TO FALLING EDGE (

sec)

-40

°C

TEMPERATURE (

°C)

DELAY TO RISING EDGE (

sec)

Overdrive = 100mV

Overdrive = 10mV

Overdrive = 50mV

Comparator Propagation Delay

vs. Supply Voltage

Comparator Propagation Delay

vs. Temperature

= 25°C

= 100pF

= 25°C

= 100pF

Overdrive = 100mV

= 4V

= 5V

= 2V

= 3V

-40

°C

2.5

2.0

1.5

1.0

- V

OUT

(V)

SOURCE

(mA)

Comparator Output Swing
vs. Output Source Current

DELAY TO FALLING EDGE (

sec)

Overdrive = 100mV

2.5

2.0

1.5

1.0

Comparator Propagation Delay

vs. Temperature

Comparator Output Swing

vs. Output Sink Current

TEMPERATURE (

°C)

SINK

(mA)

= 4V

= 5V

= 2V

= 3V

= 25°C

= 3V

= 1.8V

= 5.5V

= 3V

= 1.8V

= 5.5V

OUT

- V

(V)

Sinking

OUTPUT SHORT-CIRCUIT CURRENT (mA)

SUPPLY VOLTAGE (V)

Comparator Output Short-Circuit

Current vs. Supply Voltage

Sourcing

= -40

= 25

= 85

= 25

= 85

REFERENCE VOLTAGE (V)

1.240

1.220

1.200

1.180

1.160

1.140

LOAD CURRENT (mA)

Reference Voltage vs.

Load Current

= 1.8V

= 3V

= 5.5V

Sinking

Sourcing

= 1.8V

= 3V

= 5.5V

100

200

300

400

SUPPLY AND REFERENCE VOLTAGES (V)

TIME (

µsec)

Line Transient

Response of V

REF

TC1041

DS21346B-page 8

2002 Microchip Technology Inc.

6.0

PACKAGING INFORMATION

6.1

Package Marking Information

Package marking data not available at this time.

6.2

Taping Form

Component Taping Orientation for 8-Pin MSOP Devices

Package

Carrier Width (W)

Pitch (P)

Part Per Full Reel

Reel Size

8-Pin MSOP

12 mm

8 mm

2500

13 in

Carrier Tape, Number of Components Per Reel and Reel Size

PIN 1

User Direction of Feed

Standard Reel Component Orientation
for TR Suffix Device

Component Taping Orientation for 8-Pin SOIC (Narrow) Devices

Package

Carrier Width (W)

Pitch (P)

Part Per Full Reel

Reel Size

8-Pin SOIC (N)

12 mm

8 mm

2500

13 in

Carrier Tape, Number of Components Per Reel and Reel Size

Standard Reel Component Orientation
for TR Suffix Device

PIN 1

User Direction of Feed

2002 Microchip Technology Inc.

DS21346B-page 13

TC1041

Information contained in this publication regarding device
applications and the like is intended through suggestion only
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
No representation or warranty is given and no liability is
assumed by Microchip Technology Incorporated with respect
to the accuracy or use of such information, or infringement of
patents or other intellectual property rights arising from such
use or otherwise. Use of Microchip's products as critical com-
ponents in life support systems is not authorized except with
express written approval by Microchip. No licenses are con-
veyed, implicitly or otherwise, under any intellectual property
rights.

Trademarks

The Microchip name and logo, the Microchip logo, FilterLab,
K

, microID,

MPLAB, PIC, PICmicro, PICMASTER,

PICSTART, PRO MATE, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip Tech-
nology Incorporated in the U.S.A. and other countries.

dsPIC, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB,
In-Circuit Serial Programming, ICSP, ICEPIC, microPort,
Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM,
MXDEV, PICC, PICDEM, PICDEM.net, rfPIC, Select Mode
and Total Endurance are trademarks of Microchip Technology
Incorporated in the U.S.A.

Serialized Quick Turn Programming (SQTP) is a service mark
of Microchip Technology Incorporated in the U.S.A.

All other trademarks mentioned herein are property of their
respective companies.

Printed on recycled paper.

Microchip received QS-9000 quality system
certification for its worldwide headquarters,
design and wafer fabrication facilities in
Chandler and Tempe, Arizona in July 1999
and Mountain View, California in March 2002.
The Company's quality system processes and
procedures are QS-9000 compliant for its
PICmicro

8-bit MCUs, K

code hopping

devices, Serial EEPROMs, microperipherals,
non-volatile memory and analog products. In
addition, Microchip's quality system for the
design and manufacture of development
systems is ISO 9001 certified.

DS21346B-page 14

2002 Microchip Technology Inc.

AMERICAS

Corporate Office

2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7200 Fax: 480-792-7277
Technical Support: 480-792-7627
Web Address: http://www.microchip.com

Rocky Mountain

2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7966 Fax: 480-792-7456

Atlanta

500 Sugar Mill Road, Suite 200B
Atlanta, GA 30350
Tel: 770-640-0034 Fax: 770-640-0307

Boston

2 Lan Drive, Suite 120
Westford, MA 01886
Tel: 978-692-3848 Fax: 978-692-3821

Chicago

333 Pierce Road, Suite 180
Itasca, IL 60143
Tel: 630-285-0071 Fax: 630-285-0075

Dallas

4570 Westgrove Drive, Suite 160
Addison, TX 75001
Tel: 972-818-7423 Fax: 972-818-2924

Detroit

Tri-Atria Office Building
32255 Northwestern Highway, Suite 190
Farmington Hills, MI 48334
Tel: 248-538-2250 Fax: 248-538-2260

Kokomo

2767 S. Albright Road
Kokomo, Indiana 46902
Tel: 765-864-8360 Fax: 765-864-8387

Los Angeles

18201 Von Karman, Suite 1090
Irvine, CA 92612
Tel: 949-263-1888 Fax: 949-263-1338

New York

150 Motor Parkway, Suite 202
Hauppauge, NY 11788
Tel: 631-273-5305 Fax: 631-273-5335

San Jose

Microchip Technology Inc.
2107 North First Street, Suite 590
San Jose, CA 95131
Tel: 408-436-7950 Fax: 408-436-7955

Toronto

6285 Northam Drive, Suite 108
Mississauga, Ontario L4V 1X5, Canada
Tel: 905-673-0699 Fax: 905-673-6509

ASIA/PACIFIC

Australia

Microchip Technology Australia Pty Ltd
Suite 22, 41 Rawson Street
Epping 2121, NSW
Australia
Tel: 61-2-9868-6733 Fax: 61-2-9868-6755

China - Beijing

Microchip Technology Consulting (Shanghai)
Co., Ltd., Beijing Liaison Office
Unit 915
Bei Hai Wan Tai Bldg.
No. 6 Chaoyangmen Beidajie
Beijing, 100027, No. China
Tel: 86-10-85282100 Fax: 86-10-85282104

China - Chengdu

Microchip Technology Consulting (Shanghai)
Co., Ltd., Chengdu Liaison Office
Rm. 2401, 24th Floor,
Ming Xing Financial Tower
No. 88 TIDU Street
Chengdu 610016, China
Tel: 86-28-6766200 Fax: 86-28-6766599

China - Fuzhou

Microchip Technology Consulting (Shanghai)
Co., Ltd., Fuzhou Liaison Office
Unit 28F, World Trade Plaza
No. 71 Wusi Road
Fuzhou 350001, China
Tel: 86-591-7503506 Fax: 86-591-7503521

China - Shanghai

Microchip Technology Consulting (Shanghai)
Co., Ltd.
Room 701, Bldg. B
Far East International Plaza
No. 317 Xian Xia Road
Shanghai, 200051
Tel: 86-21-6275-5700 Fax: 86-21-6275-5060

China - Shenzhen

Microchip Technology Consulting (Shanghai)
Co., Ltd., Shenzhen Liaison Office
Rm. 1315, 13/F, Shenzhen Kerry Centre,
Renminnan Lu
Shenzhen 518001, China
Tel: 86-755-2350361 Fax: 86-755-2366086

Hong Kong

Microchip Technology Hongkong Ltd.
Unit 901-6, Tower 2, Metroplaza
223 Hing Fong Road
Kwai Fong, N.T., Hong Kong
Tel: 852-2401-1200 Fax: 852-2401-3431

India

Microchip Technology Inc.
India Liaison Office
Divyasree Chambers
1 Floor, Wing A (A3/A4)
No. 11, O'Shaugnessey Road
Bangalore, 560 025, India
Tel: 91-80-2290061 Fax: 91-80-2290062

Japan

Microchip Technology Japan K.K.
Benex S-1 6F
3-18-20, Shinyokohama
Kohoku-Ku, Yokohama-shi
Kanagawa, 222-0033, Japan
Tel: 81-45-471- 6166 Fax: 81-45-471-6122

Korea

Microchip Technology Korea
168-1, Youngbo Bldg. 3 Floor
Samsung-Dong, Kangnam-Ku
Seoul, Korea 135-882
Tel: 82-2-554-7200 Fax: 82-2-558-5934

Singapore

Microchip Technology Singapore Pte Ltd.
200 Middle Road
#07-02 Prime Centre
Singapore, 188980
Tel: 65-6334-8870 Fax: 65-6334-8850

Taiwan

Microchip Technology Taiwan
11F-3, No. 207
Tung Hua North Road
Taipei, 105, Taiwan
Tel: 886-2-2717-7175 Fax: 886-2-2545-0139

EUROPE

Denmark

Microchip Technology Nordic ApS
Regus Business Centre
Lautrup hoj 1-3
Ballerup DK-2750 Denmark
Tel: 45 4420 9895 Fax: 45 4420 9910

France

Microchip Technology SARL
Parc d'Activite du Moulin de Massy
43 Rue du Saule Trapu
Batiment A - ler Etage
91300 Massy, France
Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79

Germany

Microchip Technology GmbH
Gustav-Heinemann Ring 125
D-81739 Munich, Germany
Tel: 49-89-627-144 0 Fax: 49-89-627-144-44

Italy

Microchip Technology SRL
Centro Direzionale Colleoni
Palazzo Taurus 1 V. Le Colleoni 1
20041 Agrate Brianza
Milan, Italy
Tel: 39-039-65791-1 Fax: 39-039-6899883

United Kingdom

Arizona Microchip Technology Ltd.
505 Eskdale Road
Winnersh Triangle
Wokingham
Berkshire, England RG41 5TU
Tel: 44 118 921 5869 Fax: 44-118 921-5820

03/01/02

*DS21346B*

ORLDWIDE

ALES

AND

ERVICE

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: TC1041CEUATR

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: TC1041CEUATR