TC1278/TC1279

DS21384B-page 2

© 2002 Microchip Technology Inc.

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings*

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

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

.................................................................230mW

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

Storage Temperature Range .............. -65°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.

TC1278/TC1279 ELECTRICAL SPECIFICATIONS

Symbol

Parameter

Min

Typ

Max

Units

Device

Test Conditions

Supply Voltage

1.2

—

5.5

V

Note 1

Symbol

Parameter

Min

Typ

Max

Units

Test Conditions

Low Level @ RESET

RESET

—

—

0.4

V

TC1278

TC1279

Note 1

Output Current @ 0.4 Volts

+8

—

—

mA

Note 2

Operating Current

—

—

0.9

—

2.0

40

mA

µA

TC1278

TC1279

Operating Current

—

—

—

0.9

40

2.0

µA

mA

TC1278

TC1279

4.50

4.625

4.74

V

Note 1

4.25

4.375

4.49

V

Note 1

4.00

4.125

4.24

V

Note 1

Output Capacitance

—

9

—

pF

Internal Pull-Up Resistor

3

6

9

k

Ω

Symbol

Parameter

Min

Typ

Max

Units

Test Conditions

RESET Active Time

250

350

450

msec

—2

5

µsec TC1279

Figure 3-2

—

2

5

µsec TC1278

Figure 3-4

(4.75V-4.00V)

300

—

—

µsec

Figure 3-2, Figure 3-4

(4.00V-4.75V)

0

—

—

nsec

Figure 3-1, Figure 3-3

250

350

450

msec TC1279

Figure 3-1

250

350

450

msec TC1278

Figure 3-3

Note

1:

All voltages referenced to ground.

2:

A1k

Ω external resistor may be required in some applications for proper operation of the microprocessor reset control circuit when using