IC-PST598 [MITSUMI]
System Reset with Delay Time Circuit;
| 型号： | IC-PST598 |
| 厂家： | 
MITSUMI ELECTRONICS, CORP. |
| 描述： | System Reset with Delay Time Circuit |
| 文件： | 总5页 (文件大小：131K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MITSUMI
System Reset with Delay Time Circuit IC-PST596~598
System Reset with Delay Time Circuit
July 21, 2000
Monolithic IC IC-PST596~598 Series
Outline
This IC functions in a variety of CPU systems and other logic systems, to detect supply voltage and reset the system
accurately when the power is turned on or interrupted. It incorporates a fixed-delay time generation circuit. In
particular, this IC is a system reset IC which realizes ultra-small size and low current consumption.
Features
1. Fixed delay time setting by counter timer
2. Low operating limit voltage
0.65V typ.
3. Hysteresis voltage provided for detection voltage
4. Low current consumption
50mV typ.
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IC-PST597 100ms
IC-PST598 200ms
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6. Each model has 10 detection voltage ranks.
C:4.5V typ.
D:4.2V typ.
E:3.9V typ.
F :3.6V typ.
G:3.3V typ.
H:3.1V typ.
I :2.9V typ.
J :2.7V typ.
K:2.5V typ.
L :2.3V typ.
Package
SOT-25A (IC-PST59
N) (with manual reset pin)
The box represents a rank of detection voltage.
*
Applications
1. Reset circuits for microcomputers, CPUs and MPUs
2. Reset circuits for logic circuits
3. Battery voltage check circuits
4. Back-up power supply switching circuits
5. Level detection circuits
6. Mechanical reset circuits
•
•
Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.
The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.
MITSUMI
System Reset with Delay Time Circuit IC-PST596~598
Equivalent Circuit Diagram
5
VCC
Delay
T
Q
OSC
R
4
VOUT
3
2
GND
SUB
1
M/R
Pin Assignment
1
2
3
4
5
M/R
SUB
GND
VOUT
VCC
5
1
4
3
2
-
SOT 25
(TOP VIEW)
Pin Description
Pin No.
Pin name
Function
1
2
3
4
5
M/R
SUB
GND
VOUT
VCC
Manual reset pin 1
SUB pin
GND pin
2
Reset signal output pin
Power supply pin/Voltage detection pin
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2 : Connect to GND.
(Except where noted otherwise Ta=25°C)
Absolute Maximum Ratings
Item
Symbol
TSTG
TOPR
VCC max.
VRES max.
Pd
Ratings
Units
°C
°C
V
V
Storage temperature
Operating temperature
Power supply voltage
Manual reset input voltage
Allowable loss
-
40~+125
−20~+75
−0.3~+12
−0.3~+12
150
mW
•
•
Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.
The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.
MITSUMI
System Reset with Delay Time Circuit IC-PST596~598
Recommended Operating Conditions
Item
Symbol
Ratings
20~+75
0.3~+12
Units
°C
Operating temperature
Power supply voltage
TOPR
VCC
-
-
V
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Symbol Measuring circuit Measurement conditions Min. Typ. Max. Units
Electrical Characteristics
Item
C
D
E
F
G
H
I
4.3 4.5 4.7
4.0 4.2 4.4
3.7 3.9 4.1
3.4 3.6 3.8
3.1 3.3 3.5
2.9 3.1 3.3
2.75 2.90 3.05
2.55 2.70 2.85
2.35 2.50 2.65
2.15 2.30 2.45
VCC=H
L
Detection voltage
Vs
1
RL=470
V
VOL 0.4V
J
K
L
Hysteresis voltage
Detection voltage
Vs
1
1
VCC=L
H
L, RL=470
30
50 100 mV
Vs/ T
RL=470, Ta=−20°C~+75°C
0.01
%/°C
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Low-level output voltage
Output leakage current
Circuit current while on
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VOL
IOH
1
1
1
1
VCC=Vs min. −0.05V, RL=470
VCC=10V
0.1 0.4
V
0.1 μA
ICCL
ICCH
VCC=Vs min. −0.05V, RL=
VCC=Vs typ. / 0.85V, RL=
'
'
300 500 μA
15
50
25 μA
75
PST596
PST597
30
RL=4.7k
CL=100pF
1
"H" transport delay time
TPLH
2
60 100 150 ms
PST598 120 200 300
"L" transport delay time
Operating power supply voltage
Output current while on 1
TPHL
VOPL
2
1
1
RL=4.7k, CL=100pF,
RL=4.7k, VOL 0.4V
2
20
μs
V
0.65 0.85
I
OL1
VCC=Vs min. −0.05V, RL=0
8
6
mA
VCC=Vs min. −0.05V, RL=0
Ta=−20~+75°C
Output current while on 2
I
OL2
1
mA
V
M/R pin input H voltage
M/R pin input H current
M/R pin input low voltage
VRESH
IRESH
VRESL
2.0
VRESH=2.0V
10
60 μA
0.8
−0.3
V
1 : TPLH ; VCC$ꢂꢉ=Zꢂ[`Wꢃòꢇꢃꢊ=ꢋꢂ (Vs typ.+0.4V)
2 : TPLH ; VCC= (Vs typ.+0.4V) ꢂꢉ=Zꢂ[`Wꢃòꢇꢃꢊ=ꢋ
Note 3: Connect manual reset pin to GND when not using.
•
•
Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.
The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.
MITSUMI
System Reset with Delay Time Circuit IC-PST596~598
Measuring Circuit
[1]
[2]
R
L
A2
5
1
4
3
R
L
A1
10μF
PST
59X
INPUT
PULSE
/10V
+
5.0V
C
L=100pF
2
5
1
4
3
CRT
+
VCC
V1
V2
PST
59X
10μF
/10V
A
V
: DC ammeter
: DC voltmeter
2
VRES
CRT : Osciloscope
INPUT PULSE
VS typ
+
0.4V
VS typ
-
0.4V
0V
Timing Chart
V
VS
VCC
VS
V
VOUT
TPLH
TPLH
TPLH
V
VRES
M/R
Time
Note : Thoroughly check the actual operation of the circuit, then set the manual reset when pressing the manual
switch ON to about 15μs.
•
•
Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.
The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.
MITSUMI
System Reset with Delay Time Circuit IC-PST596~598
Application Circuits
1. Normal hard reset
To
VCC
RL
To CPU reset pin
5
1
4
3
PST
59X
Note : Connect a capacitor between IC VCC and GND
pins if VCC line impedance is high.
2
2. Manual reset
To
VCC
R
L
To CPU reset pin
4
VOUT pin low for manual switch ON.
VOUT pin high for manual switch OFF.
Note1 : Mount a clamp diode if it is possible that the
M/R pin might go below ò0.3V.
5
1
Manual
SW
PST
59X
2
3
Note2 : Thoroughly check the actual operation of the
circuit, then set the manual reset when pressing
the manual switch ON to about 15μs.
Clamp
Diode( )
*
Characteristics
VCC VS VOUT
VOUT
VCC
VS
VS
•
•
Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.
The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.
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