TC1272A datasheet(2/12 Pages) MICROCHIP

2 / 12 page

TC1272A

DS21877A-page 2

 2004 Microchip Technology Inc.

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings†

Supply Voltage (VDD to GND) ..........................................6.0V

RESET .................................................. –0.3V to (VDD +0.3V)

Input Current, VDD.........................................................20 mA

Output Current, RESET ................................................20 mA

dV/dt (VDD).............................................................100V/µsec

Operating Temperature Range..................... –40°C to +125°C

Power Dissipation (TA = 70°C):

3-Pin SOT-23B (derate 4 mW/°C above +70°C) ....320 mW

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

Maximum Junction Temperature, T

J.............................. 150°C

† Notice: Stresses above those listed under “Maximum

ratings” may cause permanent damage to the device. This is

a stress rating only and functional operation of the device at

those or any other conditions above those indicated in the

operational listings of this specification is not implied. Expo-

sure to maximum rating conditions for extended periods may

affect device reliability.

PIN FUNCTION TABLE

NAME

FUNCTION

GND

Ground

RESET

RESET push-pull output remains

low while VDD is below the reset

voltage threshold and for 140 msec

(min.) after VDD rises above reset

threshold

VDD

ELECTRICAL CHARACTERISTICS

VDD = Full Range, TA = Operating Temperature Range, unless otherwise noted. Typical values are at TA = +25°C,

VDD = 5V for L/M/J, 3.3V for T/S, 3.0V for R and 2.5V for Z (Note 1).

Parameter

Sym

Min

Typ

Max

Units

Test Conditions

VDD Range

1.0

—

5.5

TA = 0°C to +70°C

1.2

—

5.5

TA = – 40°C to +125°C

Supply Current

ICC

—12

µA

TC1272AL/M/J:

VDD < 5.5V

—9

TC1272AR/S/T/Z: VDD < 3.6V

Reset Threshold (Note 2)

VTH

4.56

4.63

4.70

TC1272AL:

TA = +25°C

4.50

—

4.75

TA = – 40°C to +125°C

4.31

4.38

4.45

TC1272AM:

TA = +25°C

4.25

—

4.50

TA = – 40°C to +125°C

3.93

4.00

4.06

TC1272AJ:

TA = +25°C

3.89

—

4.10

TA = – 40°C to +125°C

3.04

3.08

3.11

TC1272AT:

TA = +25°C

3.00

—

3.15

TA = – 40°C to +125°C

2.89

2.93

2.96

TC1272AS:

TA = +25°C

2.85

—

3.00

TA = – 40°C to +125°C

2.59

2.63

2.66

TC1272AR:

TA = +25°C

2.55

—

2.70

TA = – 40°C to +125°C

2.28

2.32

2.35

TC1272AZ:

TA = +25°C

2.25

—

2.38

TA = – 40°C to +125°C

Reset Threshold Tempco

—

ppm/°C

VDD to Reset Delay,

—

µsec

VDD = VTH to (VTH – 100 mV) (Note 2)

Reset Active Time Out

Period

140

320

560

msec

RESET Output Voltage

Low

VOL

——

0.3

TC1272AR/S/T/Z: VDD = VTH min, ISINK = 1.2 mA

——

0.4

TC1272AL/M/J:

VDD = VTH min, ISINK = 3.2 mA

——

0.3

VDD > 1.0V, ISINK = 50 µA

RESET Output Voltage

High

VOH

0.8 VDD

——

TC1272AR/S/T/Z: VDD > VTH max,

ISOURCE = 500 µA

VDD – 1.5

—

TC1272AL/M/J: VDD > VTH max, ISOURCE = 800 µA

Note 1: Production testing done at T

A = +25°C, overtemperature limits ensured by QC screen.

2: RESET Output for TC1272A.

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