TCM812LERCTR Datasheet TCM811SERCTR, TCM811TERCTR, TCM811LERCTR | P1-P3

TCM811/TCM812

Features

• Precision V

DD

Monitor for 2.0V, 2.8V, 3.0V, 3.3V,

5.0V Nominal Supplies

• Manual Reset Input

• 140 ms Minimum RESET Output Duration

• RESET

Output Valid to V

DD

= 1.0V (TCM811)

• Low 6 µA (typ.) Supply Current

•V

DD

Transient Immunity

• Small 4-Pin SOT-143 Package

• No External Components

• Replacement for MAX811/812 and Offers a Lower

Threshold Voltage Option

• Push-Pull RESET Output

• Temperature Range:

- Commercial (C) -40°C to +85°C

Applications

• Computers

• Embedded Systems

• Battery Powered Equipment

• Critical Microcontroller Power Supply Monitoring

Typical Application Circuit

General Description

The TCM811 and TCM812 are cost effective system

supervisory circuits designed to monitor V

DD

in digital

systems and provide a reset signal to the host

controller when necessary. A manual reset input is

provided to override the reset monitor and is suitable

for use as a push-button reset. No external

components are required.

The reset output is driven active within 20 µs (5 µs for

F version) of V

DD

falling through the reset voltage

threshold. RESET is maintained active for a minimum

of 140 ms after V

DD

rises above the reset threshold.

The TCM812 has an active high RESET output while

the TCM811 has an active low RESET output. The

output of the TCM811 is valid down to V

DD

=1V. Both

devices are available in a 4-Pin SOT-143 package,

specified with a temperature range of -40°C to +85°C.

The TCM811/TCM812 are optimized to reject fast

transient glitches on the V

DD

line. A low supply current

of 6 µA (V

DD

= 3.3V) makes these devices ideal for

battery powered applications.

Package Types:

TCM811

V

DD

V

DD

V

DD

RESET

INPUT

(Active Low)

GND GND

MR

PUSH

BUTTON

PIC

Microcontroller

4

3

2

0.1µF

V

DD

TCM811 RESET

GND

TCM811

TCM812

1

2

TCM812 (RESET)

3

4

MR

or

SOT-143

4-Pin Reset Monitors

TCM811/TCM812

1.0 ELECTRICAL

CHARACTERISTICS

ABSOLUTE MAXIMUM RATINGS*

Supply Voltage (V

DD

to GND)........................................+6.0V

RESET

, RESET.................................... - 0.3V to (V

DD

+ 0.3V)

Input Current,

V

DD

........................................................20 mA

Output Current, RESET

, RESET...................................20 mA

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

Storage Temperature Range .......................– 65°C to +150°C

Maximum Junction Temperature, T

S

.............................. 150°C

*Notice: Stresses beyond those listed under “Absolute Maximum Rat-

ings” may cause permanent damage to the device. These are stress

ratings only, and functional operation of the device at these or any other

conditions beyond those indicated in the operational sections of the

specifications is not implied. Exposure to absolute maximum rating

conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

V

DD

= 5V for L/M versions, V

DD

= 3.3V for T/S versions, V

DD

= 3V for R version, V

DD

= 2.0V for F version.

Unless otherwise noted, T

A

= –40°C to +85°C. Typical values are at T

A

= +25°C. (Note 1)

Parameters Sym Min Typ Max Units Conditions

V

DD

Range V

DD

1.0

1.1

—

5.5

VTCM811

TCM812

Supply Current I

CC

— 6 15 µA TCM81_L/M, V

DD

= 5.5V, I

OUT

= 0

— 4.75 10 µA TCM81_R/S/T/F, V

DD

= 3.6V,

I

OUT

=0

Reset Threshold V

TH

4.54

4.50

4.63

—

4.72

4.75

V

TCM81_L: T

A

= +25°C

T

A

= –40°C to +85°C

4.30

4.25

4.38

—

4.46

4.50

V

TCM81_M: T

A

= +25°C

T

A

= –40°C to +85°C

3.03

3.00

3.08

—

3.14

3.15

V

TCM81_T: T

A

= +25°C

T

A

= –40°C to +85°C

2.88

2.85

2.93

—

2.98

3.00

V

TCM81_S: T

A

= +25°C

T

A

= –40°C to +85°C

2.58

2.55

2.63

—

2.68

2.70

V

TCM81_R: T

A

= +25°C

T

A

= –40°C to +85°C

1.71

1.70

1.75

—

1.79

1.80

V

TCM81_F: T

A

= +25°C

T

A

= –40°C to +85°C

Reset Threshold Tempco — 30 — ppm/° C

V

DD

to Reset Delay — 20 — µs V

DD

= V

TH

to V

TH

–125 mV;

TCM81_L/M

—5—µsV

DD

= V

TH

to V

TH

–125 mV;

TCM81_R/S/T/F

Reset Active Timeout Period t

RP

140 280 560 ms V

DD

= V

TH(MAX)

MR Minimum Pulse Width t

MR

10 — — µs

MR

Glitch Immunity — 100 — ns

MR

to Reset Propagation

Delay

t

MD

—0.5—µs

Note 1: Production testing done at T

A

= +25°C and +85°C, overtemperature limits are tested with periodic QA tests

in production.

TCM811/TCM812

MR Input Threshold V

IH

2.3 — — V V

DD

> V

TH(MAX),

TCM81_L/M

0.7 V

DD

—— VV

DD

> V

TH(MAX)

, TCM81_R/S/T/F

V

IL

——0.8VV

DD

> V

TH(MAX),

TCM81_L/M

— — 0.25 V

DD

VV

DD

> V

TH(MAX)

, TCM81_R/S/T/F

MR

Pull-up Resistance 10 20 40 kΩ

RESET

Output Voltage Low

(TCM811)

V

OL

— — 0.3 V TCM811R/S/T only;

I

SINK

= 1.2 mA, V

DD

= V

TH(MIN)

— — 0.4 V TCM811F only;

I

SINK

= 500 µA, V

DD

= V

TH(MIN)

— — 0.3 V TCM811L/M only;

I

SINK

= 3.2 mA, V

DD

= V

TH(MIN)

I

SINK

= 3.2 mA, V

DD

= V

TH(MIN)

RESET Output Voltage High

(TCM811)

V

OH

0.8 V

DD

— — V TCM811R/S/T/F only;

I

SOURCE

= 500 µA, V

DD

> V

TH(MAX)

V

DD

- 1.5 — — V TCM811L/M only;

I

SOURCE

= 800 µA, V

DD

> V

TH(MAX)

RESET Output Voltage Low

(TCM812)

V

OL

— — 0.2 V TCM812F only, I

SINK

= 500 µA,

V

DD

= V

TH(MAX)

— — 0.3 V TCM812R/S/T only, I

SINK

= 1.2 mA,

V

DD

= V

TH(MAX)

— — 0.4 V TCM812L/M only, I

SINK

= 1.2 mA,

V

DD

= V

TH(MAX)

RESET Output Voltage High

(TCM812)

V

OH

0.8 V

DD

—— VI

SOURCE

= 150 µA, V

DD

≤ V

TH(MIN)

V

DD

= 5V for L/M versions, V

DD

= 3.3V for T/S versions, V

DD

= 3V for R version, V

DD

= 2.0V for F version.

Unless otherwise noted, T

A

= –40°C to +85°C. Typical values are at T

A

= +25°C. (Note 1)

Parameters Sym Min Typ Max Units Conditions

Note 1: Production testing done at T

A

= +25°C and +85°C, overtemperature limits are tested with periodic QA tests

in production.

TCM812LERCTR

TCM812LERCTR

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