TC1272/TC1273/TC1274
DS21382C-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, RESET........................20 mA
Power Dissipation (T
A
70°C)
3-Pin SOT-23 (derate 4 mW/°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 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 above those indicated in the
operation sections of the specifications is not implied. Expo-
sure to Absolute Maximum Rating conditions for extended
periods may affect device reliability.
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise noted, T
A
= -40°C to +85°C. Typical values are at T
A
= +25°C.
Parameters Sym Min Typ Max Units Conditions
Supply Voltage
TC1272, TC1273 V
CC
1.2 — 5.5 V Note 1
TC1274 V
CC
1.8 — 5.5 V
Output Voltage @ 0-500 µA V
OH
V
CC
– 0.5V V
CC
– 0.1V — V TC1272, TC1274 (Note 1)
Output Current @ 2.4 Volts
V
CC
= 5V TC1272 I
OH
—10—mANote 2
V
CC
= 4V TC1274 I
OH
—8—mA
Output Current @ 0.4 Volts I
OL
+10 30 — mA Note 2, Note 5
Operating Current
V
CC
< 5.5V: TC1272, TC1274 I
CC
—1740µANote 3
V
CCTP
< V
CC
< 5.5V: TC1273 I
CC
—1740µANote 3
V
CC
< V
CCTP
: TC1273 I
CC
— 700 1200 µA Note 3
V
CC
Trip Point (TC1272/3/4-5) V
CCTP-5
4.50 4.62 4.75 V Note 1
V
CC
Trip Point (TC1272/3/4-10) V
CCTP-10
4.25 4.37 4.49 V Note 1
V
CC
Trip Point (TC1272/3/4-15) V
CCTP-15
4.00 4.12 4.24 V Note 1
Output Capacitance C
OUT
—9—pF
Internal Pull-Up Resistor R
P
369k
AC Electrical Characteristics: T
A
= -40°C to +85°C unless otherwise noted. Typical values are at T
A
= +25°C.
RESET Active Time t
RST
100 200 300 ms
V
CC
Detect to RESET
TC1272, TC1273
t
RPD1
—2050µsV
CC(LOW)
= 1V, Figure 4-2
V
CC
Detect to RESET - TC1274 t
RPD2
—2050µsV
CC(LOW)
= 1V, Figure 4-4
V
CC
Slew Rate
(V
CCTP
(MAX) to V
CCTP
(MIN))
t
F
300 — — µs Figure 4-2, Figure 4-4
V
CC
Slew Rate
(V
CCTP
(MIN) to V
CCTP
(MAX))
t
R
0 — — ns Figure 4-1, Figure 4-3
V
CC
Detect to RESET
TC1272, TC1273
t
RPU1
100 200 300 ms Note 4, Figure 4-1
V
CC
Detect to RESET - TC1274 t
RPU2
100 200 300 ms Note 4, Figure 4-3
Note 1: All voltages referenced to ground.
2: Measured with V
CC
2.7 volts.
3: Measured with RESET
output open for TC1272/TC1273; measured with RESET output open for TC1274.
4: t
R
= 5 µs.
5: A 1 k external resistor may be required in some applications for proper operation of the microprocessor reset control
circuit when using the TC1273.
