TC1274 Datasheet, PDF (2/12 Pages) Microchip Technology – 3-Pin Reset Monitors for 5V Systems

TC1272/TC1273/TC1274
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-23B (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
TC1274 V_CC
Output Voltage @ 0-500 µA
V_OH
Output Current @ 2.4 Volts
1.2
—
5.5
1.8
—
5.5
V_CC – 0.5V V_CC – 0.1V —
V Note 1
V
V TC1272, TC1274 (Note 1)
V_CC = 5V TC1272 I_OH
—
V_CC = 4V TC1274 I_OH
—
Output Current @ 0.4 Volts
I_OL
+10
Operating Current
10
—
mA Note 2
8
—
mA
30
—
mA Note 2, Note 5
V_CC < 5.5V: TC1272, TC1274 I_CC
—
17
40
µA Note 3
V_CCTP < V_CC < 5.5V: TC1273 I_CC
—
17
40
µA Note 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
3
6
9
kΩ
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 msec
V_CC Detect to RESET
TC1272, TC1273
t_RPD1
—
20
50
µsec V_CC(LOW) = 1V, Figure 4-2
V_CC Detect to RESET - TC1274
t_RPD2
—
V_CC Slew Rate
(V_CCTP(MAX) to V_CCTP(MIN))
t_F
300
V_CC Slew Rate
t_R
0
(V_CCTP(MIN) to V_CCTP(MAX))
V_CC Detect to RESET
TC1272, TC1273
t_RPU1
100
20
50
µsec V_CC(LOW) = 1V, Figure 4-4
—
—
µsec Figure 4-2, Figure 4-4
—
—
nsec Figure 4-1, Figure 4-3
200
300 msec Note 4, Figure 4-1
V_CC Detect to RESET - TC1274
t_RPU2
100
200
300 msec 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 µsec.
5: A 1 kΩ external resistor may be required in some applications for proper operation of the microprocessor reset control
circuit when using the TC1273.
DS21382B-page 2
 2003 Microchip Technology Inc.