PHOTO IC
Light modulation photo IC
S4289-61
Asynchronous type light modulation photo IC
S4289-61 is an asynchronous type light modulation photo IC designed for reliable detection even under disturbance background light. A
photodiode, preamplifier, comparator, oscillator and signal processing circuit, etc. are all integrated on a monolithic photo IC chip. Using
asynchronous optical detection means that no wiring to a signal light source (such as LED) is required and allows greater versatility in equipment
Features
Applications
l
Asynchronous detection
l
Large allowable background illuminance: 4000
lx
Typ.
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Minimum detection level: 0.2 碌W/mm
2
Typ.
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Digital output (Output appears 鈥淟鈥?by light input.)
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Small plastic package
s
Absolute maximum ratings (Ta=25
擄C)
l
Paper detection in office machines (copier, fax machines, etc.)
l
Photosensor switches
Parameter
Symbol
Value
Vcc
-0.5 to +16
Supply voltage
Vo
-0.5 to +16
Output voltage
Io
50
Output current
1
P
250
Power dissipation *
Topr
-25 to +60
Operating temperature
Tstg
-40 to +100
Storage temperature
-
230
擄C,
5 s, at least 1.8 mm away from package surface
Soldering
*1: Derate power dissipation at a rate of 3.3 mW/擄C above Ta=25
擄C
Unit
V
V
mA
mW
擄C
擄C
-
s
Electrical and optical characteristics (Ta=25
擄C,
Vcc=5 V)
Parameter
Supply voltage
Current consumption
Low level output
voltage
Output
High level output
voltage
Cathode Pulse cycle 1
output *
3
Pulse width 1
Input signal
Pulse cycle 2
light
Pulse width 2
H鈫扡 threshold light level
Hysteresis
Frequency response
Symbol
Vcc
Icc
V
OL
V
OH
T
P1
T
W1
T
P2
T
W2
E
HL
Hys
f
Condition
Vo and cathode terminals
are open
I
OL
=16 mA
4.7 k鈩?between Vcc
and Vo
*
2
*
2
*
4
*
4
位=940
nm,
No background light
*
5
Min.
4.5
-
-
4.9
65
4
-
5
-
0.45
0.5
Typ.
-
4.0
0.2
-
130
8
-
-
0.2
0.65
1.25
Max.
16
11
0.4
-
220
13.7
50
-
1.0
0.85
-
Unit
V
mA
V
V
碌s
碌s
碌s
碌s
碌W/mm
2
-
kHz
lx
Signal light: 5
碌
W/mm
Allowable background light
位p=940
nm
Ex
2000
4000
-
level
Background light:
聯(lián)A聰 light source
*2: Pulse cycle and pulse width of built-in LED driver circuit.
*3: Cathode terminal provides output for monitoring internal logic operation. When using it should be grounded.
*4: LED drive pulse cycle and pulse width of LED in an external circuit.
*5: Hysteresis Hys = (L
鈫?/div>
H threshold illuminance) / (H
鈫?/div>
L threshold illuminance)
1
2
3
4
