NJU7296
SYSTEM RESET IC WITH DELAY CIRCUIT
■
GENERAL DESCRIPTION
The NJU7296 is a system reset IC with built-in delay circuit that
monitors the status of a power line, and outputs a reset signal to
the microcomputer.
The NJU7296 outputs a reset signal when fall below the detection
voltage.
Delay times are fixed internally and those are set in each of rising
and falling.
It is possible to monitor multiplex power line by combination of
NJU7296 because output voltage V
OUT
is kept Low level when
EXT Pin is Low level by connecting with other NJU7296.
Detection voltage’s default value is 1.0V. It can be adjusted to
desired voltage by the resistor divider.
In addition, a hysteresis voltage can be set arbitrarily by inserting a
resistor between the V
IN
pin and the HYS pin.
■
FEATURES
●
High Precision Detection Voltage
●
Detection Voltage
●
Reset Output Logic
■
PACKAGE OUTLINE
NJU7296F1
●
Delay Circuit (Internal Fixed type)
●
Ultra Low Quiescent Current
●
Supply Voltage Range
●
External Input pin
●
Adjustable Hysteresis Voltage
●
Output Type
●
Package
■
PIN CONFIGURATION
1.0% (Ta=25 C)
1.0V (default) and adjustable with external resistor
Reset Low output when V
IN
pin is detection voltage or below
*If required reset low output when V
IN
pin is detection voltage or more, see the
NJU7295.
Rising / Falling independent setting
1.7µA typ.
1.5 to 5.5V
While inputting low signal, keep output Low level
CMOS output
SOT-23-6-1
V
IN
1
V
SS
2
EXT 3
6 HYS
5 V
OUT
4 V
DD
Pin Function
1. V
IN
：Input
Voltage pin
2. V
SS
：Ground
pin
3. EXT
：External
Input pin
4. V
DD
：Supply
Voltage pin
5. V
OUT
：Output
pin
6. HYS
：External
Resistor pin for setting Hysteresis Voltage
Ver.2016-01-07
-1-
NJU7296
■
BLOCK DIAGRAM
V
DD
HYS
V
IN
Delay
Circuit
V
OUT
V
SS
EXT
■
PRODUCT CLASSFICATION
Device Name
Version
Delay Time1(Typ.) Delay Time2(Typ.)
NJU7296F1-A
A
1.25ms
10ms
NJU7296F1-B
B
10ms
20ms
NJU7296F1-C
C
10ms
10ms
NJU7296F1-D
D
10ms
30 s
■
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Supply Voltage
V
DD
Input Voltage
V
IN
Output Voltage
V
OUT
HYS Pin Voltage
V
HYS
EXT Pin Input Voltage
V
EXT
Output Current
I
OUT
HYS Pin Current
I
HYS
Power Dissipation
Surge Current
Operating Temperature
Storage Temperature
P
D
I
IN_SRG
T
opr
T
stg
RATINGS
+7
V
SS
-0.3 to +7
V
SS
-0.3 to V
DD
+0.3
V
SS
-0.3 to V
DD
+0.3
V
SS
-0.3 to V
DD
+0.3
50
10
410(*1)
SOT-23-6-1
580(*2)
±2.5(*3)
-40 to +105
-40 to +125
(Ta=25 C)
UNIT
V
V
V
V
V
mA
mA
mW
mA
C
C
(*1): Mounted on glass epoxy board. (76.2 114.3 1.6mm: based on EIA/JDEC standard, 2Layers)
(*2): Mounted on glass epoxy board. (76.2 114.3 1.6mm:based on EIA/JDEC standard, 4Layers), internal Cu area: 74.2 74.2mm
(*3):
Permissible current
range there is no logical error in V
OUT
and no destruction
-2-
Ver.2016-01-07
NJU7296
■
ELECTRICAL CHARACTERISTICS
PARAMETER
Detection Voltage
Quiescent Current
Output Current
HYS Pin Current
Average Temperature
Coefficient of Detection
Voltage
EXT Pin
High Level Voltage
EXT Pin
Low Level Voltage
V
IN
Pin Resistance
EXT Pin Resistance
Operating Voltage
SYMBOL
V
DET
I
SS
I
OUT
I
HYS
TEST CONDITION
No Signal
Nch, V
DS
=0.5V
Pch, V
DS
=0.5V
Nch, V
DS
=0.5V
Pch, V
DS
=0.5V
Unless otherwise noted, V
DD
=3.3V, Ta=25 C
MIN.
TYP.
MAX.
UNIT
-1.0%
1.0
+1.0%
V
-
1.7
3.0
A
12
15
-
mA
7.5
11
-
7.5
12
-
mA
5.0
9.0
-
-
0.67xV
DD
-
10
0.5
1.5
100
-
-
20
1.0
-
-
V
DD
0.33xV
DD
-
-
5.5
ppm/ C
V
V
M
M
V
V
DET
/ Ta Ta=0 C to +85 C
V
EXT_H
V
EXT_L
R
IN
R
EXT
V
OPL
■
ELECTRICAL CHARACTERISTICS (Defined by each versions)
PARAMETER
Delay Time 1
SYMBOL
t
d1
TEST CONDITION
NJU7296F1-A
NJU7296F1-B
V
IN
=H→L
NJU7296F1-C
NJU7296F1-D
NJU7296F1-A
NJU7296F1-B
V
IN
=L→H
NJU7296F1-C
NJU7296F1-D
Unless otherwise noted, V
DD
=3.3V, Ta=25 C
MIN.
TYP.
MAX.
UNIT
1.05
1.25
1.43
ms
7
10
14
ms
7
10
14
ms
-
30
100
s
7
10
14
ms
16
20
24
ms
7
10
14
ms
7
10
14
ms
Delay Time 2
t
d2
Ver.2016-01-07
-3-
NJU7296
■
FUNCTION DESCRIPTION
(1) Basic Operation
Input Voltage
(V
IN
)
Detection Voltage
(V
DET
)
Release Voltage *
(V
DET
)
*In case of not setting
(1)
When input voltage V
IN
falls below the
detection voltage V
DET
, after the delay time
which is fixed for each version, the output
voltage V
OUT
is switched from High
level to Low level.
V
SS
the hysteresis voltage.
(2) In the state of V
IN
is below the release
Output Voltage
(V
OUT
)
voltage V
DET
, the reset state is maintained.
The default release voltage V
DET
is same as
detection voltage V
DET
, although can be set
the hysteresis by inserting a resistor between
the V
IN
pin and the HYS pin.
(3) When V
IN
increases and it reaches
release
voltage V
DET
, after the delay time which is
fixed for each version, V
OUT
is switched from
Low level to High level.
Delay Time1
(t
d1
)
Delay Time2
(t
d2
)
V
SS
Ver.2016-01-07
-5-
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