TC1270/TC1271
DS21381D-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
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.
ELECTRICAL SPECIFICATIONS
Electrical Characteristics: V
CC
= 5V for L/M versions, V
CC
= 3.3V for T/S versions, V
CC
= 3V for R version, V
CC
=2.0V for F
version. Unless otherwise noted, T
A
= -40°C to +85°C. Typical values are at T
A
= +25°C. (Note 1).
Symbol Parameter Min Typ Max Units Test Conditions
V
CC
V
CC
Range 1.2 — 5.5 V
I
CC
Supply Current — 7 15 µA V
CC
> V
TH
, for L/M/R/S/T/F
—1015µAV
CC
< V
TH
, for L/M/R/S/T
—612µAV
CC
< V
TH
, for F
V
TH
Reset Threshold 4.54
4.50
4.63
—
4.72
4.75
V
V
TC127_L; T
A
= +25°C
T
A
= -40°C to +85°C
4.30
4.25
4.38
—
4.46
4.50
V
V
TC127_M; T
A
= +25°C
T
A
= -40°C to +85°C
3.03
3.00
3.08
—
3.14
3.15
V
V
TC127_T; T
A
= +25°C
T
A
= -40°C to +85°C
2.88
2.85
2.93
—
2.98
3.00
V
V
TC127_S; T
A
= +25°C
T
A
= -40°C to +85°C
2.58
2.55
2.63
—
2.68
2.70
V
V
TC127_R; T
A
= +25°C
T
A
= -40°C to +85°C
1.71
1.70
1.75
—
1.79
1.80
V
V
TC127_F; T
A
= +25°C
T
A
= -40°C to +85°C
Reset Threshold Tempco — 30 — ppm/°C
V
CC
to Reset Delay —
—
20
5
—
—
µs V
CC
= V
TH
to V
TH
– 125 mV;
L/M/R/S/T/F
t
RP
Reset Active Time-out Period 140 280 560 ms V
CC
= V
TH(MAX)
t
MR
MR Minimum Pulse Width 10 — — µs
MR
Glitch Immunity — 0.1 — µs
t
MD
MR to Reset Propagation Delay — 0.5 — µs
V
IH
MR Input Threshold 2.3 — — V V
CC
> V
TH(MAX)
, TC127_L/M
0.7 V
CC
—— VV
CC
> V
TH(MAX)
, TC127_R/S/T/F
V
IL
——0.8
V
V
CC
> V
TH(MAX)
, TC127_L/M
— — 0.15 V
CC
V
V
CC
> V
TH(MAX)
, TC127_R/S/T/F
MR
Pull-up Resistance 10 20 40 kΩ
V
OH
Reset Output Voltage High
(TC1271)
0.8 V
CC
—— VI
SOURCE
=150µA;
V
CC
≤ V
TH(MIN)
Note 1: Production testing done at T
A
= +25°C, over temperature limits ensured by design.
2: RESET
output for TC1270, Reset output for TC1271.
