Tab: 835-12
Wuxi I-CORE Electronics Co., Ltd.
rev:B2
Number: AiP555-AX-BJ-452
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Specification Revision History
：
Version
2017-11-A1
Address：Building B4,NO.777,Jianzhu Road,Binhu Distrct,Wuxi City,Jiangsu Province
http://www.i-core. cn
P.C：214072
or
e
AiP555
General Purpose Timers
Product
Specification
Data
Description
New-made
2017-11
1/ 11
VER：2017-11-A1
Tab: 835-12
Wuxi I-CORE Electronics Co., Ltd.
rev:B2
Number: AiP555-AX-BJ-452
1、General Description
The AiP555 is a CMOS RC timer providing significantly improved performance over the standard
SE/NE 555 timer, while at the same time being a direct replacement for those devices in most applications.
Improved parameters include low supply current, wide operating supply voltage range, low Threshold,
Trigger and Reset currents, no crowbarring of the supply current during output transitions, higher
frequency performance and no requirement to decouple Control Voltage for stable operation.
Specifically, the AiP555 is a stable controller capable of producing accurate time delays or
frequencies. In the one shot mode, the pulse width of each circuit is precisely controlled by one external
resistor and capacitor. For astable operation as an oscillator, the free running frequency and the duty cycle
are both accurately controlled by two external resistors and one capacitor. Unlike the regular bipolar 555
device, the Control Voltage terminal need not be decoupled with a capacitor. The circuits are triggered and
reset on falling (negative) waveforms, and the output inverter can source or sink currents large enough to
drive TTL loads, or provide minimal offsets to drive CMOS loads.
2、Block Diagram And Pin Description
2.1、Block Diagram
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2.2、Pin Configurations
NOTE:
UNUSED INPUTS SHOULD BE CONNECTED TO APPROPRIATE VOLTAGE FROM TRUTH
TABLE
Address：Building B4,NO.777,Jianzhu Road,Binhu Distrct,Wuxi City,Jiangsu Province
http://www.i-core. cn
P.C：214072
or
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GND
1
2
3
4
8
7
AiP555
6
5
VDD
DISCHARGE
THRESHOLD
CONTROL
VOLTAGE
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VER：2017-11-A1
/TRIGGER
OUTPUT
/RESET
Tab: 835-12
Wuxi I-CORE Electronics Co., Ltd.
rev:B2
Number: AiP555-AX-BJ-452
2.3、Pin Description
Pin No.
1
2
3
4
5
6
7
8
Pin Name
GND
/TRIGGER
OUTPUT
/RESET
CONTROL VOLTAGE
THRESHOLD
DISCHARGE
VDD
Description
Ground
Trigger Voltage Input
Voltage Signal Output
Reset Voltage Input
Control Voltage Input
Threshold Voltage Input
Discharge Switch
Power
3.1、 Absolute Maximum Ratings
Characteristic
Power Supply Voltage
Input Voltage
(Tamb=25℃, All voltage referenced to Vss, unless otherwise specified)
Symbol
VDD
VIN
I
OUT
Conditions
Operating Temperature
Storage Temperature
Power Dissipation
Soldering Temperature
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3.2、Electrical Characteristics
(Tamb=25℃, unless otherwise specified)
Parameter
Symbol
I
DD
Static Supply Current
Monostable Timing
Accuracy
Drift with Supply
Astable Timing
Accuracy
Drift with Supply
Threshold Voltage
Trigger Voltage
V
TH
V
TRIG
Address：Building B4,NO.777,Jianzhu Road,Binhu Distrct,Wuxi City,Jiangsu Province
http://www.i-core. cn
P.C：214072
or
e
Value
+18
Unit
V
V
Trigger， Control
Voltage, Threshold,
Reset
-0.3½V
DD
+0.3
100
Output Current
mA
℃
℃
Topr
Tstg
P
D
T
L
-25½85
500
245
-55½125
10s
mW
℃
Conditions
V
DD
=5V
V
DD
=15V
Min.
Typ.
40
60
2
0.5
2
0.5
62
28
67
32
71
36
Max.
200
300
Unit
μA
μA
%
%/V
%
%/V
%V
DD
%V
DD
R
A
=10k, C=0.1μF, V
DD
=5V
V
DD
=5V to 15V
R
A
=R
B
=10k, C=0.1μF, V
DD
=5V
V
DD
=5V to 15V
V
DD
=15V
V
DD
=15V
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VER：2017-11-A1
3、Electrical Parameter
Tab: 835-12
Wuxi I-CORE Electronics Co., Ltd.
rev:B2
Number: AiP555-AX-BJ-452
Threshold Current
Trigger Current
Control Voltage
Reset Voltage
Reset Current
Discharge Leakage
I
TH
I
TRIG
V
CV
V
RST
I
RST
I
DIS
V
OL
V
DD
=15V
V
DD
=15V
V
DD
=15V
V
DD
=2V to 15V
V
DD
=15V
V
DD
=15V
V
DD
=15V，I
SINK
=20mA
V
DD
=5V，I
SINK
=3.2mA
V
DD
=15V，I
SOURSE
=0.8mA
V
DD
=5V，I
SOURSE
=0.8mA
V
DD
=5V, I
SINK
=15mA
Functional Operation
14.3
4.0
0.4
0.2
14.6
4.3
62
0.4
67
10
10
71
1.0
10
10
1.0
0.4
nA
nA
%V
DD
V
nA
nA
V
V
V
V
Discharge Output
Voltage
Supply Voltage
Output Rise Time
Output Fall Time
Oscillator Frequency
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3.3、Truth Table
4、Function Description
4.1、General
Threshold Voltage
Trigger Voltage
Reset
Output
Discharge Switch
Don’t Care
Don’t Care
Low
Low
On
>2/3(V+)
>1/3(V+)
High
Low
On
<2/3(V+)
>1/3(V+)
High
Stable
Stable
Don’t Care
<1/3(V+)
High
High
Off
NOTE: Reste will dominate all other inputs: Trigger will dominate over Threshold.
The AiP555 device is, in most instances, a direct replacement for the NE/SE555 device. However, it
is possible to effect economies in the external component count using the AiP555. Because the bipolar 555
device produces large crowbar currents in the output driver, it is necessary to decouple the power supply
lines with a good capacitor close to the device. The AiP555 device produces no such transients. See Figure
1.
The AiP555 produces supply current spikes of only 2-3mA instead of 300-400mA and supply
decoupling is normally not necessary. Secondly, in most instances, the Control Voltage decoupling
Address：Building B4,NO.777,Jianzhu Road,Binhu Distrct,Wuxi City,Jiangsu Province
http://www.i-core. cn
P.C：214072
4/ 11
VER：2017-11-A1
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V
OH
V
DIS
V
DD
t
R
t
F
0.2
0.4
V
2.0
18.0
V
R
L
=10M, C
L
=10pF, V
DD
=5V
R
L
=10M, C
L
=10pF, V
DD
=5V
V
DD
=5
V,R
A
=470Ω， R
B
=270Ω，
75
75
1
ns
ns
f
MAX
MHz
Output Voltage
Tab: 835-12
Wuxi I-CORE Electronics Co., Ltd.
rev:B2
Number: AiP555-AX-BJ-452
capacitors are not required since the input impedance of the CMOS comparators on chip are very high.
Thus, for many applications, 2 capacitors can be saved using an AiP555.
4.2、Power Supply Considerations
Although the supply current consumed by the AiP555 device is very low, the total system supply can
be high unless the timing components are high impedance. Therefore, high values for R and low values for
C in Figures 2 and 3 are recommended
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Address：Building B4,NO.777,Jianzhu Road,Binhu Distrct,Wuxi City,Jiangsu Province
http://www.i-core. cn
P.C：214072
or
e
Figure2 ASTABLE OPERATION
5/ 11
VER：2017-11-A1
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