This IC is a reset IC for turning on/off power supply and power flicker in CPU or logic systems.
This IC can change delay time by an external capacitor.
Charging method of the capacitor, is current source type.
Current source type can reduce temperature fluctuations in the delay time. td typ. ±6% (Ta=
-
40°C to 105°C), It is ideal
for a wide set the operating temperature range.
Features
1.
2.
3.
4.
5.
6.
7.
8.
9.
Maximum supply voltage
Detecting voltage accuracy
Low supply current
Operating supply voltage
Operating temperature
Reset voltage rank
Reset temperature coefficient
Current source
Output type
Delay time temperature characteristics
0.30
CD=0.01[µF]
7V
±1.0%
0.35µA typ.
0.95 to 6.5V
-40 to +105°C
1.6 to 5.2V (0.1Vstep)
±100ppm/°C typ.
100nA typ.
Open drain, CMOS
Delay time (s)
0.25
0.20
0.15
0.10
0.05
0.00
−50
Delay Resistance type
Current source type
−25
0
25
50
75
100
Temperature (ºC)
Packages
SC-82ABB
SOT-25A
Applications
1.
2.
3.
4.
The reset of CPU and MPU and logic circuit
Battery voltage check
Back-up circuit
Level detector
• 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 IC with delay PST89XB Series
Block Diagram
PST893Bxxx
VDD
Charge current
OUT
Vref
GND
CD
: Protection Circuit
PST894Bxxx
VDD
Charge current
OUT
Vref
GND
CD
: Protection Circuit
• 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 IC with delay PST89XB Series
Pin Assignment
4
3
5
4
1
2
3
4
5
OUT
VDD
GND
NC
CD
1
2
1
2
3
4
GND
VDD
CD
OUT
1
2
3
SC-82ABB
(TOP VIEW)
SOT-25A
(TOP VIEW)
Pin Description
SC-82ABB
Pin No.
1
2
3
4
Pin name
GND
VDD
CD
OUT
GND Pin
VDD Pin / Voltage Detect Pin
Capacitor Connect Pin with Delay
Reset Signal Output Pin
Functions
SOT-25A
Pin No.
1
2
3
4
5
Pin name
OUT
VDD
GND
NC
CD
Functions
Reset Signal Output Pin
VDD Pin / Voltage Detect Pin
GND Pin
No Connection
Capacitor Connect Pin with Delay
• 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 IC with delay PST89XB Series
Absolute Maximum Ratings
Item
Supply Voltage
(Except where noted otherwise Ta=25°C)
Symbol
VDD max.
Ratings
- 0.3~+7.0
PST893 Series
GND- 0.3 ~
VDD max. +0.3
GND- 0.3 ~+7.0
0~20
0~20
GND- 0.3 ~ VDD max. +0.3
150
- 40~+105
- 65~+125
mA
mA
V
mW
°C
°C
Units
V
Output Voltage
OUT
PST894 Series
V
Input Current (V
DD
)
Output Current (OUT)
CD Pin Input Voltage
Power dissipation
Operating temperature
Storage temperature
I
DD
I
OUT
V
CD
Pd
Topr
Tstg
Recommended Operating Conditions
Item
Operating Ambient temperature
Operating voltage
Symbol
Topr
V
DD
Ratings
- 40~+105
0.95~6.5
Units
°C
V
Model Name
P
S
T
8
9
a
a
Output Type
3
CMOS
Output
Open
drain
Output
b
c
CD pin charge Type Detecting Voltage Rank
B
Current
source
160
Setting of
the detection
voltage
from 1.6V
to 5.2V,0.1V
step.
U
B
b
d
Package
SC-82ABB
M
c
d
e
e
Packing Specifications
R HOUSING
Halogen-free Product
L HOUSING
Halogen-free Product
4
N
SOT-25A
H
520
• 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 IC with delay PST89XB Series
Electrical Characteristics
Item
Symbol
(Except where noted otherwise Ta=25°C)
Rank
160
170
180
190
200
210
220
230
240
250
260
270
Min.
1.5840
1.5600
1.6830
1.6575
1.7820
1.7550
1.8810
1.8525
1.9800
1.9500
2.0790
2.0475
2.1780
2.1450
2.2770
2.2425
2.3760
2.3400
2.4750
2.4375
2.5740
2.5350
2.6730
2.6325
2.7720
2.7300
2.8710
2.8275
2.9700
2.9250
3.0690
3.0225
3.1680
3.1200
3.2670
3.2175
3.3660
3.3150
3.4650
3.4125
3.5640
3.5100
3.6630
3.6075
3.7620
3.7050
3.8610
3.8025
3.9600
3.9000
Typ.
1.6000
1.7000
1.8000
1.9000
2.0000
2.1000
2.2000
2.3000
2.4000
2.5000
2.6000
2.7000
2.8000
2.9000
3.0000
3.1000
3.2000
3.3000
3.4000
3.5000
3.6000
3.7000
3.8000
3.9000
4.0000
Max.
1.6160
1.6400
1.7170
1.7425
1.8180
1.8450
1.9190
1.9475
2.0200
2.0500
2.1210
2.1525
2.2220
2.2550
2.3230
2.3575
2.4240
2.4600
2.5250
2.5625
2.6260
2.6650
2.7270
2.7675
2.8280
2.8700
2.9290
2.9725
3.0300
3.0750
3.1310
3.1775
3.2320
3.2800
3.3330
3.3825
3.4340
3.4850
3.5350
3.5875
3.6360
3.6900
3.7370
3.7925
3.8380
3.8950
3.9390
3.9975
4.0400
4.1000
Units
Circuit
Measurement conditions
Reset threshold
(Note1)
V
TH
Ta=+25°C
Ta=−40~+85°C
280
290
300
310
320
330
340
350
360
370
370
390
400
V
2
Note1 : This device is tested at Ta=25°C, over temperature limits guaranteed by desigh only.
Note2 : The parameter is guaranteed by design.
• 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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