TC1278/TC1279
DS21384D-page 2 © 2007 Microchip Technology Inc.
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings †
Supply Voltage (V
CC
to GND)..............................+6.0V
RESET
, RESET...........................-0.3V to (V
CC
+ 0.3V)
Input Current, V
CC
..............................................20 mA
Output Current, RESET......................................20 mA
Power Dissipation (T
A
≤ 70°C)
3-Pin SOT-23 (derate 4mW/°C above +70°C)
................................................................230 mW
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.
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, T
A
= -40°C to +85°C. Typical values are at T
A
= +25°C.
Parameters Sym Min Typ Max Units Conditions
Supply Voltage V
CC
1.2 — 5.5 V Note 1
Low Level @ RESET (TC1278)
RESET (TC1279)
V
OL
——0.4VNote 1
Output Current @ 0.4 Volts I
OL
+8 — — mA Note 2
Operating Current:
TC1278 I
CC1
—0.92.0mAV
CC
> V
CCTP(MAX)
, RESET = 1, (Note 3)
TC1279 — — 40 µA V
CC
> V
CCTP(MAX)
, RESET = 1, Note 4
Operating Current:
TC1278 I
CC2
— — 40 µA V
CC
< V
CCTP(MIN)
, RESET = 0, (Note 4)
TC1279 —0.92.0mAV
CC
< V
CCTP(MIN)
, RESET = 0,
(Note 3)
V
CC
Trip Point (TC1278/9-5) V
CCTP-5
4.50 4.625 4.74 V Note 1
V
CC
Trip Point (TC1278/9-10) V
CCTP-10
4.25 4.375 4.49 V Note 1
V
CC
Trip Point (TC1278/9-15) V
CCTP-15
4.00 4.125 4.24 V Note 1
Output Capacitance C
OUT
—9—pF
Internal Pull-Up Resistor R
P
369kΩ
Note 1: All voltages referenced to ground.
2: A 1 kΩ external resistor may be required in some applications for proper operation of the microprocessor
reset control circuit when using the TC1279. V
CC
= 1.8V.
3: Operating current is specified with the open-drain output in the active (“ON”) condition.
4: Operating current is specified with the open-drain output in the non-active (“OFF”) condition.
