TC1270A/70AN/71A
Voltage Supervisor with Manual Reset Input
Features:
• Precision voltage monitor
- 2.63V, 2.93V, 3.08V, 4.38V and 4.63V trip
points (Typical)
• Manual Reset input
• Reset Time-out Delay:
- Standard: 280 ms (Typical)
- Optional: 2.19 ms, and 35 ms (Typical)
• Power Consumption
≤
15 µA max
• No glitches on outputs during power-up
• Active Low Output Options:
- Push-Pull Output and Open-Drain Output
• Active High Output Option:
- Push-Pull Output
• Replacement for (Specification compatible with):
- TC1270, TC1271
- TCM811, TCM812
• Fully static design
• Low voltage operation (1.0V)
• ESD protection:
-
≥
4 kV Human Body Model (HBM)
-
≥
400V Machine Model (MM)
• Extended (E) Temperature range:
-40°C to +125°C
• Package Options:
- 4-lead SOT-143
- 5-lead SOT-23
- Pb-free Device
Package Types
SOT-143
V
SS
1
4
V
DD
V
SS
TC1270A
SOT-143
1
4
V
DD
TC1271A
RST
2
3
MR
RST
2
3
MR
SOT-23-5
NC
V
DD
MR
1
2
3
5
V
SS
NC
V
DD
4
RST
MR
TC1270A
TC1270AN
SOT-23-5
1
2
3
5
V
SS
TC1271A
4
RST
Functional Block Diagram
V
DD
Voltage
Detector
Circuitry
Reset
Generator
& Delay
Timer
(2.19 ms,
35 ms,
280 ms)
RST
(TC1271A)
RST
PP
(TC1270A)
RST
OD
(TC1270AN)
PP
Output
Driver
Comment
DS22035B-page 1
18.5 kΩ
MR
Glitch Filter
Device Features
Reset Delay
(ms) (Typ)
(3)
Reset Trip
Point (V)
(3)
Voltage
Range (V)
Output
Device
Type
TC1270A
Push-Pull
Active
Level
Low
Low
High
2.19,
35,
280
(1)
4.63, 4.38,
3.08, 2.93,
2.63
(4)
1.0V
to
5.5V
Temperature
Range
Packages
TC1270AN Open-Drain
TC1271A
Note 1:
2:
3:
4:
Push-Pull
-40°C
SOT-23-5 New Option
to
+125°C SOT-143
(2)
, Replaces TC1271 and
SOT-23-5 TCM812
SOT-143
(2)
, Replaces TC1270 and
SOT-23-5 TCM811
The 280 ms Reset Delay time-out is compatible with the TC1270, TC1271, TCM811, and TCM812
devices.
The SOT-143 package is compatible with the TC1270, TC1271, TCM811, and TCM812 devices.
Custom Reset Trip Points and Reset Delays available, contact factory.
The TC1270/1 and TCM811/12 1.75V Trip Point Option is not supported.
©
2007 Microchip Technology Inc.
TC1270A/70AN/71A
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings †
Supply Voltage (V
DD
to V
SS
) ...............................+7.0V
Input Current, V
DD
..............................................10 mA
Output Current, RESET, RESET ........................10 mA
Voltage on all inputs and outputs
w.r.t. V
SS
............................ -0.6V to (V
DD
+ 1.0V)
Storage Temperature Range ..............-65°C to +150°C
Operating Temperature Range...........-40°C to +125°C
Maximum Junction Temperature, T
S
................... 150°C
ESD protection on all pins
Human Body Model
....................................... ≥
4 kV
Machine Model
.............................................. ≥
400V
† Notice:
Stresses above those listed under "Absolute
Maximum Ratings" may cause permanent damage to
the device. This is a stress ratings only and functional
operation of the device at those or any other conditions
above those indicated in the operational listing of this
specifications is not implied. Exposure to Absolute
Maximum Rating conditions for extended periods may
affect device reliability.
ELECTRICAL CHARACTERISTICS
Electrical Characteristics:
Unless otherwise noted, V
DD
= 5V for L/M versions, V
DD
= 3.3V for T/S versions,
V
DD
= 3V for R version, T
A
= -40°C to +125°C. Typical values are at T
A
= +25°C.
Parameter
Operating Voltage Range
Supply Current
Sym
V
DD
I
DD
Min
1.0
—
—
—
Reset Trip Point
Threshold
(3)
V
TRIP
4.54
4.50
4.30
4.25
3.03
3.00
2.88
2.85
2.72
2.70
2.58
2.55
Note 1:
2:
3:
4:
5:
6:
Typ
(1)
—
7
4.75
10
4.63
—
4.38
—
3.08
—
2.93
—
2.77
—
2.63
—
Max
5.5
15
10
15
4.72
4.75
4.46
4.50
3.14
3.15
2.98
3.00
2.82
2.85
2.68
2.70
Units
V
µA
µA
µA
V
V
V
V
V
V
V
V
V
V
V
V
TC127xA:
(5)
V
DD
> V
TRIP
, for L/M/R/S/T,
V
DD
= 5.5V
V
DD
> V
TRIP
, for R/S/T, V
DD
= 3.6V
V
DD
< V
TRIP
, for L/M/R/S/T
TC127xAL: T
A
= +25°C
T
A
= –40°C to +125°C
TC127xAM: T
A
= +25°C
T
A
= –40°C to +125°C
TC127xAT: T
A
= +25°C
T
A
= –40°C to +125°C
TC127xAS: T
A
= +25°C
T
A
= –40°C to +125°C
T
A
= +25°C
T
A
= –40°C to +125°C
TC127xAR: T
A
= +25°C
T
A
= –40°C to +125°C
Test Conditions
Data in the Typical (“Typ”) column is at 5V, +25°C, unless otherwise stated.
RST output for TC1270A, and TC1270AN, RST output for TC1271A.
TC127XA refers to either the TC1270A, TC1270AN or TC1271A device.
Hysteresis is within the V
TRIP(MIN)
to V
TRIP(MAX)
window.
Custom ordered Voltage Trip Point. Minimum order volume requirement.
This specification allows this device to be used in PIC® microcontroller applications that require the
In-Circuit Serial Programming™ (ICSP™) feature (see device-specific programming specifications for
voltage requirements). The total time that the RST pin can be above the maximum device operational
voltage (5.5V) is 100s. Current into the RST pin should be limited to 2 mA. It is recommended that the
device operational temperature be maintained between 0°C to +70°C (+25°C preferred). For additional
information, refer to
Figure 2-41.
DS22035B-page 2
©
2007 Microchip Technology Inc.
TC1270A/70AN/71A
ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Characteristics:
Unless otherwise noted, V
DD
= 5V for L/M versions, V
DD
= 3.3V for T/S versions,
V
DD
= 3V for R version, T
A
= -40°C to +125°C. Typical values are at T
A
= +25°C.
Parameter
Reset Threshold Tempco
Reset Trip Point
Hysteresis
(4)
MR Input High Threshold
MR Input Low Threshold
MR Pull-up Resistance
Open-Drain High Voltage
on Output
V
ODH
V
HYS
V
IH
V
IL
Sym
Min
—
—
2.3
0.7 V
DD
—
—
10
—
Typ
(1)
±30
0.3
—
—
—
—
18.5
—
Max
—
—
—
—
0.8
0.25 V
DD
40
13.5
Units
ppm/°C
%
V
V
V
V
kΩ
V
Open-Drain Output pin only.
V
DD
= 3.0V, Time voltage > 5.5
applied
≤
100s. Current into pin
limited to 2 mA +25°C operation
recommended
(Note 6)
R/S/T only,
I
SINK
= 1.2 mA, V
DD
= V
TRIP(MIN)
R/S/T only,
I
SINK
= 1.2 mA, V
DD
= V
TRIP(MAX)
L/M only,
I
SINK
= 3.2 mA, V
DD
= V
TRIP(MIN)
L/M only,
I
SINK
= 3.2 mA, V
DD
= V
TRIP(MAX)
L/M only,
I
SINK
= 50 µA, V
DD
> 1.0V
R/S/T only,
I
SOURCE
= 500 µA, V
DD
= V
TRIP(MAX)
L/M only,
I
SOURCE
= 800 µA, V
DD
= V
TRIP(MAX)
I
SOURCE
= 500 µA, V
DD
≤
V
TRIP(MIN)
V
PIN
= V
DD
Open-Drain configuration only.
Percentage of V
TRIP
Voltage
V
DD
> V
TRIP(MAX)
, L/M only
V
DD
> V
TRIP(MAX)
, R/S/T only
V
DD
> V
TRIP(MAX)
, L/M only
V
DD
> V
TRIP(MAX)
, R/S/T only
Test Conditions
Reset
Output
Voltage
Low
(2)
TC1270A/
TC1270AN
TC1271A
TC1270A/
TC1270AN
TC1271A
TC1270A/
TC1270AN
V
OL
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.3
0.3
0.4
0.3
0.3
—
—
—
±1
1
50
V
V
V
V
V
V
V
V
µA
µA
pF
Reset
Output
Voltage
High
(2)
TC1270A
TC1270A
TC1271A
V
OH
0.8 V
DD
V
DD
- 1.5
0.8 V
DD
Input Leakage Current
Open-Drain RST Output
Leakage
Capacitive Loading
Specification on Output
Pins
Note 1:
2:
3:
4:
5:
6:
I
IL
I
OLOD
C
IO
—
—
—
Data in the Typical (“Typ”) column is at 5V, +25°C, unless otherwise stated.
RST output for TC1270A, and TC1270AN, RST output for TC1271A.
TC127XA refers to either the TC1270A, TC1270AN or TC1271A device.
Hysteresis is within the V
TRIP(MIN)
to V
TRIP(MAX)
window.
Custom ordered Voltage Trip Point. Minimum order volume requirement.
This specification allows this device to be used in PIC® microcontroller applications that require the
In-Circuit Serial Programming™ (ICSP™) feature (see device-specific programming specifications for
voltage requirements). The total time that the RST pin can be above the maximum device operational
voltage (5.5V) is 100s. Current into the RST pin should be limited to 2 mA. It is recommended that the
device operational temperature be maintained between 0°C to +70°C (+25°C preferred). For additional
information, refer to
Figure 2-41.
©
2007 Microchip Technology Inc.
DS22035B-page 3
TC1270A/70AN/71A
1.1
1.1.1
AC CHARACTERISTICS
TIMING PARAMETER SYMBOLOGY
The timing parameter symbols have been created
following one of the following formats:
1. TppS2ppS
T
F
Frequency
E
Error
Lowercase letters (pp) and their meanings:
pp
io
Input or Output pin
rx
Receive
bitclk
RX/TX BITCLK
drt
Device Reset Timer
Uppercase letters and their meanings:
S
F
Fall
H
High
I
Invalid (High-impedance)
L
Low
2. TppS
T
Time
osc
tx
RST
Oscillator
Transmit
Reset
P
R
V
Z
Period
Rise
Valid
High-impedance
FIGURE 1-1:
TEST LOAD CONDITIONS
Pin
V
SS
C
L
= 50 pF
DS22035B-page 4
©
2007 Microchip Technology Inc.
TC1270A/70AN/71A
1.1.2
TIMING DIAGRAMS AND SPECIFICATIONS
FIGURE 1-2:
MR
MR PIN AND RESET PIN WAVEFORM
t
MR
t
MRNI
t
RST
t
MD
RST
RST
FIGURE 1-3:
V
TRIP(MIN)
V
DD
1V
DEVICE VOLTAGE AND RESET PIN (ACTIVE LOW) WAVEFORM
V
TRIP
V
TRIP(MAX)
t
RST
t
RD
t
RST
RST
(1)
RST
V
DD
< 1V is outside the device operating specification. The RST (or RST) output state is unknown while V
DD
< 1V.
Note 1:
The TC1270AN requires an external pull-up resistor.
TABLE 1-1:
RESET AND DEVICE RESET TIMER REQUIREMENTS
Electrical Characteristics:
Unless otherwise noted, V
DD
= 5V for L/M versions, V
DD
= 3.3V for T/S versions,
V
DD
= 3V for R version, T
A
= -40°C to +125°C. Typical values are at T
A
= +25°C.
Parameter
V
DD
to Reset Delay
Reset Active
Timeout
Period
TC127XAxBVyy
(3)
TC127XAxCVyy
TC127XAxVyy
(3)
(3)
Sym
t
RD
t
RST
Min
—
1.09
17.5
140
Typ
(1)
50
2.19
35
280
—
0.1
0.2
Max
—
4.38
70
560
—
—
—
Units
µs
ms
ms
ms
µs
µs
µs
Test Conditions
V
DD
= V
TRIP(MAX)
to
V
TRIP(MIN)
–125 mV
V
DD
= V
TRIP(MAX)
V
DD
= V
TRIP(MAX)
V
DD
= V
TRIP(MAX)
MR Minimum Pulse Width
MR Noise Immunity
MR to Reset Propagation Delay
Note 1:
2:
3:
t
MR
t
MRNI
t
MD
10
—
—
Unless otherwise stated, data in the Typical (“Typ”) column is at 5V, +25°C.
RST output for TC1270A, RST output for TC1271A.
TC127XA refers to either the TC1270A, TC1270AN or TC1271A device. “x” indicated the selected Voltage
Trip Point, while “yy” indicates the package code.
©
2007 Microchip Technology Inc.
DS22035B-page 5
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