PT
Pericom Technology Inc.
Features
•
•
•
•
•
•
•
•
High accuracy:
±1.5%
(25°C)
Low power consumption: 0.9uA @ 3V Vcc
Detect voltage range: 1.8 to 5V in 100mV increments
Operating voltage range: 1.2V ~ 5.5V
Operating temperature range: -40°C to + 85°C
Detect voltage accuracy over temperature:
±2.5% ×
TYP
Output configuration: N-channel open drain or
CMOS
Reset timeout period at least 140ms
Data Sheet
PT7M6418CL/CH /NL-6450CL/CH /NL
Mp Supervisor
General
The PT7M64xx series are µP supervisory circuits with a
minimum reset timeout period of 140ms. 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
Functional Diagram).
Output is asserted when V
CC
falls below the internal V
TH-
after a reset timeout period and remains asserted until
V
CC
rises above V
TH+
(V
TH+
= V
TH-
×1.05).
These devices
provide excellent circuit reliability and low cost by
eliminating external components and adjustments when
monitoring nominal system voltages from +1.8V to +5V
in 100mV increments. The series are voltage detectors
with a propagation delay of 36µs.
The family is available with three output stage options:
push-pull with active-low output, push-pull with active-
high output, and open drain with active-low output.
These devices specified over the -40°C to +85°C
temperature range.
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Ordering Information
Part Number
PT7M64xxCLT3
PT7M64xxCLT5
PT7M64xxCLC3
PT7M64xxCHT3
PT7M64xxCHT5
Package
SOT23-3
SOT23-5
SC70-3
SOT23-3
SOT23-5
Part Number
PT7M64xxCHC3
PT7M64xxNLT3
PT7M64xxNLT5
PT7M64xxNLC3
Package
SC70-3
SOT23-3
SOT23-5
SC70-3
Note:
“xx” refer to voltage range, see below table 1.
Table 1. Suffix “xx” definition of PT7M64xx
Suffix xx
18
19
20
21
22
23
24
V
TH-
(V)
1.8
1.9
2.0
2.1
2.2
2.3
2.4
Suffix xx
25
26
27
28
29
30
31
V
TH-
(V)
2.5
2.6
2.7
2.8
2.9
3.0
3.1
Suffix xx
32
33
34
35
36
37
38
V
TH-
(V)
3.2
3.3
3.4
3.5
3.6
3.7
3.8
Suffix xx
39
40
41
42
43
44
45
V
TH-
(V)
3.9
4.0
4.1
4.2
4.3
4.4
4.5
Suffix xx
46
47
48
49
50
V
TH-
(V)
4.6
4.7
4.8
4.9
5.0
Table 2.
Function comparison
Reset Output
Item
1
2
3
Part No.
PT7M64xxCL
PT7M64xxCH
PT7M64xxNL
Open-Drain
Active high
Active low
-
-
-
-
-
√
Push-Pull
Active high
Active low
-
√
√
-
-
-
Threshold
1.8V to 5.0V in 100mV
increments
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PT
Pericom Technology Inc.
Block Diagram
Block Diagram of PT7M64xxCL/CH
Data Sheet
PT7M6418CL/CH /NL-6450CL/CH /NL
Mp Supervisor
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Vcc
-
+
RST / (RST)
(RST is for
64xxCH only)
GND
Reference
Voltage
1.25V
Block Diagram of PT7M64xxNL
VCC
-
+
RST
Reset
Timeout
GND
Reference
Voltage
1.25V
PT0200(11/04)
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PT
Pericom Technology Inc.
Pin Configuration
PT7M64xxCLC3
PT7M64xxNLC3
1
GND
1
Data Sheet
PT7M6418CL/CH /NL-6450CL/CH /NL
Mp Supervisor
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PT7M64xxCLT3
PT7M64xxNLT3
RST
1
PT7M64xxCLT5
PT7M64xxNLT5
NC
VCC
5
VCC
3
VCC
3
2
GND
2
RST
SC70-3
2
GND
SOT23-3
3
GND
RST
4
SOT23-5
PT7M64xxCHC3
1
GND
1
PT7M64xxCHT3
RST
1
PT7M64xxCHT5
NC
VCC
5
VCC
3
VCC
3
2
GND
2
RST
SC70-3
2
GND
SOT23-3
3
GND
RST
4
SOT23-5
Pin Description
Name
RST
Type
Description
Reset Output (PT7M64xxCL/NL):
RST is asserted when V
CC
drops below voltage threshold V
TH-
. Active
low.
Reset Output (PT7M64xxCH).
RST is asserted when V
CC
drops below voltage threshold V
TH-
. Active high.
Ground
Supply Voltage.
O
RST
GND
V
CC
O
P
P
PT0200(11/04)
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PT
Pericom Technology Inc.
Typical Operation Circuit
PT7M64xxNL Application Example
Data Sheet
PT7M6418CL/CH /NL-6450CL/CH /NL
Mp Supervisor
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V
CC1
PT7M64xxNL
Vcc1/Vcc2
RL
RST
GND
RESET
Vcc
For typical application, R
L
could be 100kΩ, R
IN
less than 10kΩ and that C more than 0.1µF.
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Pericom Technology Inc.
Maximum Ratings
o
o
Data Sheet
PT7M6418CL/CH /NL-6450CL/CH /NL
Mp Supervisor
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Storage Temperature ............................................................-65 C to +150 C
Ambient Temperature with Power Applied .......................... -40
o
C to +85
o
C
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 10V, 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
0.8×Vcc
0.8×Vcc
0.8×Vcc
5.5
1.2
2.0
Supply Current
I
CC
Output high
(Push-Pull
only)
Output
Driving
Output low
V
CC
≥
1.8V, I
source
= 1mA
V
OH
V
CC
≥
2.5V, I
source
= 3mA
V
CC
≥
4.5V, I
source
= 8mA
V
CC
≥
1.2V, I
sink
= 1mA
V
0.3
0.3
0.4
100
nA
V
V
OL
V
CC
≥
2.5V, I
sink
= 4mA
V
CC
≥
4.5V, I
sink
= 9mA
Open-Drain Output
Leakage Current
I
LKG
+25°C
V
TH-
-40°C~85°C
(V
TH-
)
×0.985
(V
TH-
)
×0.975
(V
TH+
)
×0.985
(V
TH+
)
×0.975
V
TH-
V
TH-
V
TH+
V
TH+
Voltage Threshold*
+25°C
V
TH+
-40°C~85°C
Voltage threshold Hysteresis
V
HYST
(V
TH-
)
×1.015
(V
TH-
)
×1.025
(V
TH+
)
×1.015
(V
TH+
)
×1.025
V
V
HYST
= [(V
TH+
)-(V
TH-
)]/(V
TH-
)
3
4.5
6
×100%
*
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.
%
PT0200(11/04)
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