NJM2103
SYSTEM RESET IC
■ GENERAL DESCRIPTION
NJM2103 is supply voltage supervisory IC to detect the abnormal
conditions, such as shut down of all supply voltages at once, or sudden
voltage down and then generate the reset signal. It supervises both 5V
supply voltage and the voltage optionally set up.
■ PACKAGE OUTLINE
NJM2103D
■ FEATURES
● Precise Detection of Supply Voltage Down
● Possible Detection of Optional Voltage Down
● Possible Detection of Optional Over-loading
● Low Operating Current
● Reference Voltage can be taken out.
● Low Reset Validated Voltage
● Voltage Detection with Hystersis Feature
● Package Outline
● Bipolar Technology
NJM2103M
(VSA=4.2V±2.5%)
(VSB=1.22V±1.5%)
(ICC≦560µA@VSB=5V)
(V+=0.8V Typ.)
NJM2103L
DIP8, DMP8, SIP8
■ PIN CONFIGURATION
PIN FUNCTION
1. CT
2. VSC
3. OUTC
4. GND
5. V+
6. VSB/ RESIN
7. VSA
8. RESET
NJM2103L
NJM2103D
NJM2103M
■ BLOCK DIAGRAM
V
+
5
100kΩ
1.235V
-
7
40kΩ
VSA
VSB / RESIN
6
+
10µA
+
Comp.A
1.235V
Reference Voltage
6µA
-
+
-
+
-
2
VSC
4
GND
+
Comp.C
Comp.B
R
Q
S
1
CT
Ver.2012-07-09
8
3
RESET OUTC
-1-
NJM2103
(Ta=25°C)
■ ABSOLUTE MAXIMUM RATINGS
SYMBOL
RATINGS
UNIT
Supply Voltage
PARAMETER
V+
20
V
Power Dissipation
PD
Input Voltage A
VSA
V++0.3 (<20)
V
Input Voltage B
VSB
20
V
Input Voltage C
VSC
20
V
Operating Temperature Range
Topr
-40 to +85
°C
Storage Temperature Range
Tstg
-40 to +125
°C
(DIP8)
(DMP8)
(SIP8)
500
300
800
mW
mW
mW
■ ELECTRICAL CHARACTERISTICS
● DC CHARACTERISTICS
PARAMETER
(V+=5.0V, VSB=0V, VSC=0V, Ta=25°C)
SYMBOL
CONDITION
MIN.
TYP.
MAX.
UNIT
4.10
4.20
50
1.202
14
-
380
460
4.20
4.30
100
1.220
3
28
0
20
560
700
4.30
4.40
150
1.238
10
42
250
250
µA
µA
V
V
mV
V
mv
mV
nA
nA
4.5
4.9
-
µV
I RESET =2mA
-
0.20
0.40
V
I RESET =10mA
-
0.30
0.50
V
20
80
-
mA
6.0
1.215
6
9.5
0
50
1.235
3
0
0.10
20
13.0
500
500
1.255
10
1
0.40
-
µA
nA
nA
V
mV
µA
V
mA
-
0.8
1.2
V
Operating Current (1)
Operating Current (2)
VSA Detecting Voltage (1)
VSA Detecting Voltage (2)
VSA Hysterisis Width
VSB Detecting Voltage
VSB Dtetecting Supply Voltage Fluctuation
VSB Hysterisis Width
VSB Input Current (1)
VSB Input Current (2)
ICC1
ICC2
VSAL
VSAH
VHRSA
VSBL
∆VSBL
VHRSB
IIHB
IILB
High Level RESET Output Voltage
VOHR
I RESET =-5µA, VSB=5V
RESET Output Saturating Voltage (1)
VOLR1
RESET Output Saturating Voltage (2)
VOLR2
RESET Output Sink Current
CT Charge Current
VSC Input Current (1)
VSC Input Current (2)
VSC Detecting Voltage
VSC Detecting Supply Voltage Fluctuation
OUTC Output Leak Current
OUTC Output Saturation Voltage
OUTC Output Sink Current
RESET Guarantee Minimum Supply Voltage
I RESET
ICT
IIHC
IILC
VSC
∆VSC
IOHC
VOLC
IOUTC
+
VL
VSB=5V
+
+
V fall time VSB=V
V+ rise time VSB=V+
VSB fall time
V+=3.5 to 18V
VSB=5V
VOLR=1.0V
VSB=5V, VCT=0.5V
VSC=5V
V+=3.5 to 13.5V
VOHC=13.5V
IOUT=4mA, VSC=5V
VOLC=1.0V, VSC=5V
VOLR=0.4V, I RESET =200µA
+
(V =5.0V, VSB=5.0V, VSC=0V, CT=0.01µF, Ta=25°C)
● AC CHARACTERISTICS
ITEM
VSA Input Pulse Width
VSB Input Pulse Width
RESET Output Pulse Width
RESET Rise Time
SYMBOL
tPIA
tPIB
tPO
tr
RESET Fall Time
tf
Output Delay Time
Output Delay Time
Output Delay Time
tPD
tPHL
tPLH
-2-
CONDITION
MIN.
-
TYP.
3.0
1.5
MAX.
-
UNIT
µs
µs
VSB=V+
-
1.5
-
ms
+
-
1.0
-
µs
VSB=V , RL=2.2kΩ, CL=100pF
-
0.1
-
µs
VSB fall time
VSC rise time, RL=2.2kΩ, CL=100pF
VSC fall time, RL=2.2kΩ, CL=100pF
-
2
0.5
1.0
-
µs
µs
µs
VSB=V , RL=2.2kΩ, CI=100pF
+
Ver.2012-07-09
NJM2103
■ TERMINAL FUNCTION
PIN NO.
SYMBOL
FUNCTION
1
CT
Pin Connection to Capacitor,
Set the reset holding time.
2
VSC
Comparator Input
3
OUTC
Open Collector Output of
Comparator C.
Ver.2012-07-09
INSIDE EQUIVALENT CIRCUIT
-3-
NJM2103
■ TERMINAL FUNCTION
PIN NO.
SYMBOL
FUNCTION
4
GND
Ground
5
V+
Operating Voltage
6
VSB/RESIN
Comparator B Input
7
VSA
Comparator A Input
8
RESET
Reset Output
Internalizing pull up resistor
-4-
INSIDE EQUIVALENT CIRCUIT
Ver.2012-07-09
NJM2103
■ APPLICATION CIRCUIT
1) 5V Supply Voltage Monitor
2) Monitoring of Optional Supply Voltage (V+≦13.5V)
⎛
R ⎞
Detecting Voltage≒ ⎜⎜1 + 1 ⎟⎟ ×VSB
R
2 ⎠
⎝
(Notice)
If it were that V+ indicates under 4.50V, Connect
7 pin to V+
3) Monitoring of Optional Supply Voltage (V+>13.5V)
⎛ R ⎞
Detecting Voltage ≒ ⎜⎜1 + 4 ⎟⎟ ×VSB
⎝ R5 ⎠
⎛
R ⎞
Constant Voltage Output VS ≒ ⎜⎜1 + 1 ⎟⎟ ×VSC
⎝ R2 ⎠
4) Compulsry Reset
Input Reset signal TTL level to VSB - terminal
⎧V (High Level )
RESET Output ≒ ⎨ S
⎩OV (Low Level)
Ver.2012-07-09
-5-
NJM2103
5) 5V, VCC<12V Supply Voltage Monitor
6) Non-Inverting Reset
■ TYPICAL CHARACTERISTICS
-6-
Operating Current 1 vs. Operating Voltage
Operating Current 2 vs. Operating Voltage
Output Voltage vs. Operating Voltage
Detect Voltage (VSA) vs. Temperature
Ver.2012-07-09
NJM2103
■ TYPICAL CHARACTERISTICS
Detect Voltage (VSA) vs. Temperature
Detect Voltage (VSC) vs. Temperature
Output Voltage vs. Output Current
Output Voltage vs. Output Current
Output Voltage (OUTC) vs. Output Current (IOUTC)
Detect Voltage (VSB, VSC) vs. Supply Voltage
Ver.2012-07-09
-7-
NJM2103
■ TYPICAL CHARACTERISTICS
Reset Hold Time vs. G
Reset Hold Time vs. Operating Voltage
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
-8-
Ver.2012-07-09