MITSUMI PST600J

MITSUMI
System Reset PST600
System Reset
Monolithic IC PST600
Outline
This IC operates in a variety of CPU systems and other logic systems by detecting power supply voltage, so
that the system can be reset accurately when power is turned on or when power is momentarily cut. PST572
and others perform the same function as does this series, but this IC is a low reset type system resetting IC
which follows load current so that circuit current flow increases for ON, and has low current consumption for
both ON and OFF.
Features
1. Follows load current so that circuit current flow increases for ON, and has low current consumption for
both ON and OFF.
No load : ICCL=7µA typ.; ICCH=5µA typ.
2. Low operating limit voltage
0.65V typ.
3. Hysteresis voltage provided in detection voltage 50mV typ.
4. The following 10 ranks of detection voltages are available.
PST600 C : 4.5V typ.
H : 3.1V typ.
D : 4.2V typ.
I : 2.9V typ.
E : 3.9V typ.
J : 2.7V typ.
F : 3.6V typ.
K : 2.5V typ.
G : 3.3V typ.
L : 2.3V typ.
Package
MMP-3A (PST600 M)
TO-92A (PST600 )
contains detection voltage rank.
*
Applications
1. Microcomputers, CPU, MPU reset circuits
2. Logic circuit reset circuits
3. Battery voltage check circuits
4. Back-up power supply switching circuits
5. Level detection circuits
Equivalent Circuit
System Reset PST600
MITSUMI
Pin Assignment
1
2
1
VCC
2
GND
3
VOUT
1
3
2
VCC
2
GND
3
VOUT
3
MMP-3A
TO-92A
Absolute Maximum Ratings
(Ta=25°C)
Item
Storage temperature
Operating temperature
Power supply voltage
Symbol
TSTG
TOPR
VCC max.
Allowable loss
Pd
Electrical Characteristics
Item
Ratings
-40~+125
-20~+75
-0.3~10
200 (MMP-3A)
300 (TO-92A)
Units
°C
°C
V
mW
(Ta=25°C) (unless otherwise indicated resistance unit is Ω)
Symbol
Measurement
circuit
Measurement conditions
Min. Typ. Max. Units
1
PST600C
PST600D
PST600E
PST600F
RL=470
PST600G
VOL <= 0.4V
PST600H
VCC=H L
PST600I
PST600J
PST600K
PST600L
RL=470, VCC=L H L
Vs/ T
1
RL=470, Ta=-20°C~+75°C
±0.01
VOL
IOH
1
1
0.3
Circuit current for ON
ICCL
1
Circuit current for OFF
H transmission delay time
L transmission delay time
Operating limit voltage
Output current 1 for ON
Output current 2 for ON
ICCH
tPLH
tPHL
VopL
IOL 1
IOL 2
1
2
2
1
1
1
VCC=Vs min. -0.05V, RL=470
VCC=10V
IOL=0mA
VCC=Vs min.
-0.05V
IOL=8mA
VCC=Vs typ./0.85V, RL=∞
RL=4.7k, CL=100pF 1
RL=4.7k, CL=100pF 1
RL=4.7k, VOL <= 0.4V
VCC=Vs min. -0.05V, RL=0
Ta=-20°C~+75°C, RL=0 2
Detection voltage
Hysteresis voltage
Detection voltage
temperature coefficient
Low level output voltage
Output leak current
*
*
1
1 tPLH : VCC= (Vs typ. -0.4V)
2 VCC=Vs min. -0.15V
Vs
Vs
1
(Vs typ.+0.4V), tPLH : VCC= (Vs typ.+0.4V)
4.3
4.0
3.7
3.4
3.1
2.9
2.75
2.55
2.35
2.15
30
*
*
*
(Vs typ.-0.4V)
20
10
8
6
4.5
4.2
3.9
3.6
3.3
3.1
2.90
2.70
2.50
2.30
50
7
50
5
40
20
0.65
4.7
4.4
4.1
3.8
3.5
3.3
3.05
2.85
2.65
2.45
100
V
mV
%/°C
0.4
±0.1
14
130
10
80
40
0.85
V
µA
µA
µA
µS
µS
V
mA
mA
System Reset PST600
MITSUMI
Measurement Circuit
[1]
[2]
VS 4.9
4.1
0V
* The input model is an example of PST600C (MMP-3P).
Characteristics
(PST600C is used as the representative model for characteristics examples.)
VCC vs. VOUT
8
7
6
5
Vout 4
(V)
3
2
1
0
VOL vs. Ta
450
400
VOL 350
(mV) 300
Ta=-25°C
Ta=25°C
Ta=75°C
0
1
2
3
250
4
5
6
7
200
-40
8
-20
0
VCC (V)
20
Ta
VS vs. Ta
40
60
80
40
60
80
40
60
80
(°C)
VS vs. Ta
80
4.7
70
4.6
60
VS
(V)
VS 50
(mV)
40
4.5
4.4
30
4.3
20
-40
4.2
-20
0
20
40
60
80
-40
-20
0
Ta(°C)
Ta (°C)
ICCL vs. IOL
ICCL
(µA)
ICCH vs. Ta
100
8
80
7
60
ICCH
(µA)
40
6
5
4
20
0
0
20
2
4
6
IOL (mA)
8
10
12
3
-40
-20
0
20
Ta(°C)
System Reset PST600
MITSUMI
IOL vs. Ta
VOL vs. IOL
500
60
400
50
IOL
(mA)
VOL
(mV)
40
30
200
100
20
10
-40
300
-20
0
20
40
60
0
0
80
2
4
6
8
10
12
IOL (mA)
Ta (°C)
ICCL (IOL=0mA) vs. Ta
9
8
ICCL
(µA)
7
6
5
4
-40
-20
0
20
40
60
80
Ta (°C)
Application Circuits
1. Normal hard reset
Delay Time (tPLH)
··CL
=
RL
V
[ln ————————————
]+0.040 (mS)
+0.2)
V - (VS
CC
CC
CPU
Vs CPU : CPU, MPU reset threshold voltage
CL : µF
RL : kΩ
Voltage : V
Note : When VCC line impedance is high, connect a
capacitor between IC Pins 1 and 2.
2. Manual Reset
Note : Prevent Manual SW chattering by using RL , CL
and Rm. Rm setting conditions are as follows :
Rm <= 1/20 RL
Note : When VCC line impedance is high,connect a
capacitor between IC Pins 1 and 2.
MITSUMI
System Reset PST600
3. Battery Checker (LED ON for High voltage)
Note : When VCC line impedance is high, connect a
capacitor between IC Pins 1 and 2.
4. Battery Checker (LED ON for Low voltage)
Note : When VCC line impedance is high, connect a
capacitor between IC Pins 1 and 2.