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TC1272A Datasheet, PDF (2/14 Pages) Microchip Technology – 3-Pin Reset Monitor
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TC1272A
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, TJ.............................. 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
GND
RESET
VDD
FUNCTION
Ground
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
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
Supply Current
ICC
Reset Threshold (Note 2) VTH
Reset Threshold Tempco
1.0
1.2
—
—
4.56
4.50
4.31
4.25
3.93
3.89
3.04
3.00
2.89
2.85
2.59
2.55
2.28
2.25
—
—
5.5
V TA = 0°C to +70°C
—
5.5
TA = – 40°C to +125°C
12
30
µA TC1272AL/M/J: VDD < 5.5V
9
25
TC1272AR/S/T/Z: VDD < 3.6V
4.63
4.70
V TC1272AL:
TA = +25°C
—
4.75
TA = – 40°C to +125°C
4.38
4.45
V TC1272AM:
TA = +25°C
—
4.50
V
TA = – 40°C to +125°C
4.00
4.06
V TC1272AJ:
TA = +25°C
—
4.10
V
TA = – 40°C to +125°C
3.08
3.11
V TC1272AT:
TA = +25°C
—
3.15
V
TA = – 40°C to +125°C
2.93
2.96
V TC1272AS:
TA = +25°C
—
3.00
V
TA = – 40°C to +125°C
2.63
2.66
V TC1272AR:
TA = +25°C
—
2.70
V
TA = – 40°C to +125°C
2.32
2.35
V TC1272AZ:
TA = +25°C
—
2.38
V
TA = – 40°C to +125°C
30
— ppm/°C
VDD to Reset Delay,
Reset Active Time Out
Period
—
65
—
µsec VDD = VTH to (VTH – 100 mV) (Note 2)
140
320
560 msec
RESET Output Voltage
VOL
—
Low
—
—
0.3
V 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
VOH 0.8 VDD
—
—
V TC1272AR/S/T/Z: VDD > VTH max,
High
ISOURCE = 500 µA
VDD – 1.5
—
—
TC1272AL/M/J: VDD > VTH max, ISOURCE = 800 µA
Note 1: Production testing done at TA = +25°C, overtemperature limits ensured by QC screen.
2: RESET Output for TC1272A.
DS21877B-page 2
 2004-2012 Microchip Technology Inc.
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