PT7M6418 -6450 series
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µP
Supervisory Circuit
Features
•
•
•
•
•
•
•
•
High accuracy:
±2%
(25°C)
Low power consumption: 0.6µA @ 3V Vcc
Detecting voltage range: 1.8 to 5V in 100mV
increments
Operating voltage range: 1.2V ~ 5.5V
Operating temperature range: -40°C to + 85°C
Detecting
voltage
accuracy
over
temperature:
±2.5% ×
TYP
Output configuration: N-channel open drain or
CMOS
Reset timeout period at least 120ms
Description
The PT7M64xx series are µP supervisory circuits with a
minimum reset timeout period of 120ms. Each circuit
includes a precise bandgap reference; a comparator, a
reset timeout circuit, internally trimmed resistor networks
that set specified trip thresholds, and an internal 5%
threshold hysteresis circuit (see the
Block Diagram).
Output is asserted when V
CC
falls below the internal V
TH-
and remains asserted until V
CC
rises above V
TH+
(V
TH+
=
V
TH-
×1.05)
after a reset timeout period. These devices
provide excellent circuit reliability and low cost by
eliminating external components and adjustments when
monitoring normal systems voltage from +1.8V to +5V
in 100mV increments. The series are voltage detectors
with a propagation delay of 35µs.
The family is available with four output stage options:
push-pull with active-low output, push-pull with active-
high output, open drain with active-low output and
bidirection port with active-low output and pushbutton
reset input. These devices specified over the -40°C to
+85°C temperature range.
Ordering Information
Part Number
PT7M64xxCLTA3E
PT7M64xxCLTA5E
PT7M64xxCLC4E
PT7M64xxCLTDE
PT7M64xxCLBTA5E
PT7M64xxCLBC4E
PT7M64xxCHTA3E
PT7M64xxCHTA5E
PT7M64xxCHC4E
PT7M64xxCHNBE
PT7M64xxCHTDE
Package
Lead free and Green SOT23-3
Lead free and Green SOT23-5
Lead free and Green SC70-4
Lead free SOT89
Lead free and Green SOT23-5
Lead free and Green SC70-4
Lead free and Green SOT23-3
Lead free and Green SOT23-5
Lead free and Green SC70-4
Lead free TO92
Lead free SOT89
Part Number
PT7M64xxCHBTA5E
PT7M64xxNLLC4E
PT7M64xxNLTA3E
PT7M64xxNLTA5E
PT7M64xxNLC4E
PT7M64xxNLTDE
PT7M64xxNLBTA5E
PT7M64xxBLTA3E
PT7M64xxBLTA5E
PT7M64xxBLTDE
PT7M64xxBLBTA5E
Package
Lead free and Green SOT23-5
Lead free and Green SC70-4
Lead free and Green SOT23-3
Lead free and Green SOT23-5
Lead free and Green SC70-4
Lead free SOT89
Lead free and Green SOT23-5
Lead free and Green SOT23-3
Lead free and Green SOT23-5
Lead free SOT89
Lead free and Green SOT23-5
Note:
“xx” refer to voltage range, see below Table 1.
ECN No: 10-0003
1
PT0200S-8
01/17/11
PT7M6418 -6450 series
µP
Supervisory Circuit
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Maximum Ratings
Storage Temperature ............................................................-65
ºC
to +150
ºC
Ambient Temperature with Power Applied ..........................-40
ºC
to +85
ºC
Supply Voltage to Ground Potential (Vcc to GND) ..............-0.3V to +6.0V
DC Input Voltage (All inputs except Vcc and GND).......-0.3V to V
CC
+0.3V
DC Output Current (All outputs) .........................................................20mA
Power Dissipation ..............................................................................320mW
(Depend on package)
Note:
Stresses greater than 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 these or any other condi-
tions above those indicated in the operational sec-
tions of this specification is not implied. Exposure
to absolute maximum rating conditions for extended
periods may affect reliability.
DC Electrical Characteristics
(V
CC
= 1.2V to 5.5V, T
A
= -40~85ºC, unless otherwise noted. Typical values are at T
A
= +25ºC)
Description
Supply Voltage
Sym
V
CC
Test Conditions
Min
1.0
Typ
-
Max
5.5
Unit
V
µA
µA
T
A
= 0~70ºC
T
A
= -40~85ºC
V
CC
= 3V. No load.
V
CC
= 5V. No load.
1.2
-
-
-
0.6
0.9
-
-
-
-
-
-
-
5.5
1.2
2.0
-
-
-
0.3
0.3
0.4
1
(V
TH-
)
×1.02
(V
TH-
)
×1.025
(V
TH+
)
×1.02
(V
TH+
)
×1.025
Supply Current
I
CC
Output high
(Push-Pull
only)
Output
Driving
Output low
V
CC
≥
1.8V, I
source
= 1mA
V
OH
0.8×Vcc
0.8×Vcc
0.8×Vcc
-
-
-
-
(V
TH-
)
×0.98
(V
TH-
)
×0.975
(V
TH+
)
×0.98
(V
TH+
)
×0.975
V
CC
≥
2.5V, I
source
= 3mA
V
CC
≥
4.5V, I
source
= 8mA
V
CC
≥
1.2V, I
sink
= 1mA
V
CC
≥
2.5V, I
sink
= 4mA
V
CC
≥
4.5V, I
sink
= 9mA
V
V
OL
V
Open-Drain Output
Leakage Current
I
LKG
V
TH-
-
+25°C
-40°C~85°C
µA
V
TH-
V
TH-
V
TH+
Voltage Threshold*
+25°C
V
TH+
-40°C~85°C
Voltage threshold Hysteresis
Pushbutton Detect
Internal Pull-Up Resistor
V
HYST
P
BDV
R
P
V
HYST
= [(V
TH+
)-(V
TH-
)]/(V
TH-
)
×100%
-40°C~85°C, Vcc = 5V
-
V
V
TH+
4.5
-
5
3
0.7
3.75
6
1.2
6.25
%
V
kΩ
*
V
TH+
= 1.05
×
V
TH-.
V
TH-
is VCC dropping from high to low voltage. V
TH+
is V
CC
rising from low to high voltage
ECN No: 10-0003
4
PT0200S-8
01/17/11
Microchip MCU
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