TC1272A
DS21877B-page 2 2004-2012 Microchip Technology Inc.
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings†
Supply Voltage (V
DD
to GND) ..........................................6.0V
RESET
..................................................–0.3V to (V
DD
+0.3V)
Input Current, V
DD
.........................................................20 mA
Output Current, RESET
................................................20 mA
dV/dt (V
DD
).............................................................100V/µsec
Operating Temperature Range.....................–40°C to +125°C
Power Dissipation (T
A
= 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, T
J
..............................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 FUNCTION
GND Ground
RESET
RESET push-pull output remains
low while V
DD
is below the reset
voltage threshold and for 140 msec
(min.) after V
DD
rises above reset
threshold
V
DD
ELECTRICAL CHARACTERISTICS
V
DD
= Full Range, T
A
= Operating Temperature Range, unless otherwise noted. Typical values are at T
A
= +25°C,
V
DD
= 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
V
DD
Range 1.0 — 5.5 V T
A
= 0°C to +70°C
1.2 — 5.5 T
A
= – 40°C to +125°C
Supply Current I
CC
—1230µATC1272AL/M/J: V
DD
< 5.5V
—925 TC1272AR/S/T/Z: V
DD
< 3.6V
Reset Threshold (Note 2) V
TH
4.56 4.63 4.70 V TC1272AL: T
A
= +25°C
4.50 — 4.75
T
A
= – 40°C to +125°C
4.31 4.38 4.45 V TC1272AM: T
A
= +25°C
4.25 — 4.50 V T
A
= – 40°C to +125°C
3.93 4.00 4.06 V TC1272AJ: T
A
= +25°C
3.89 — 4.10 V T
A
= – 40°C to +125°C
3.04 3.08 3.11 V TC1272AT: T
A
= +25°C
3.00 — 3.15 V T
A
= – 40°C to +125°C
2.89 2.93 2.96 V TC1272AS: T
A
= +25°C
2.85 — 3.00 V T
A
= – 40°C to +125°C
2.59 2.63 2.66 V TC1272AR: T
A
= +25°C
2.55 — 2.70 V T
A
= – 40°C to +125°C
2.28 2.32 2.35 V TC1272AZ: T
A
= +25°C
2.25 — 2.38 V T
A
= – 40°C to +125°C
Reset Threshold Tempco — 30 — ppm/°C
V
DD
to Reset Delay, — 65 — µsec V
DD
= V
TH
to (V
TH
– 100 mV) (Note 2)
Reset Active Time Out
Period
140 320 560 msec
RESET
Output Voltage
Low
V
OL
——0.3VTC1272AR/S/T/Z: V
DD
= V
TH
min, I
SINK
= 1.2 mA
——0.4 TC1272AL/M/J: V
DD
= V
TH
min, I
SINK
= 3.2 mA
——0.3 V
DD
> 1.0V, I
SINK
= 50 µA
RESET
Output Voltage
High
V
OH
0.8 V
DD
——VTC1272AR/S/T/Z: V
DD
> V
TH
max,
I
SOURCE
= 500 µA
V
DD
– 1.5 — — TC1272AL/M/J: V
DD
> V
TH
max, I
SOURCE
= 800 µA
Note 1: Production testing done at T
A
= +25°C, overtemperature limits ensured by QC screen.
2: RESET
Output for TC1272A.
