S4289-61 Datasheet, PDF (1/4 Pages) Hamamatsu Corporation – Light modulation photo IC Asynchronous type light modulation

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
l Asynchronous detection
l Large allowable background illuminance: 4000 lx Typ.
l Minimum detection level: 0.2 µW/mm² Typ.
l Digital output (Output appears “L” by light input.)
l Small plastic package
Applications
l Paper detection in office machines (copier, fax machines, etc.)
l Photosensor switches
s Absolute maximum ratings (Ta=25 °C)
Parameter
Symbol
Value
Supply voltage
Vcc
-0.5 to +16
Output voltage
Vo
-0.5 to +16
Output current
Io
50
Power dissipation *¹
P
250
Operating temperature
Topr
-25 to +60
Storage temperature
Tstg
-40 to +100
Soldering
-
230 °C, 5 s, at least 1.8 mm away from package surface
*1: Derate power dissipation at a rate of 3.3 mW/°C above Ta=25 °C
s Electrical and optical characteristics (Ta=25 °C, Vcc=5 V)
Parameter
Symbol
Condition
Min.
Typ.
Max.
Supply voltage
Vcc
4.5
-
16
Current consumption
Icc
Vo and cathode terminals
are open
-
4.0
11
Output
Cathode
output *³
Low level output
voltage
High level output
voltage
Pulse cycle 1
Pulse width 1
VOL IOL=16 mA
VOH
4.7 kΩ between Vcc
and Vo
TP1
*²
TW1
*²
-
0.2
0.4
4.9
-
-
65
130
220
4
8
13.7
Input signal Pulse cycle 2
light
Pulse width 2
TP2
*⁴
TW2
*⁴
-
-
50
5
-
-
H→L threshold light level
EHL
λ=940 nm,
No background light
-
0.2
1.0
Hysteresis
Hys *⁵
0.45
0.65
0.85
Frequency response
f
0.5
1.25
-
Signal light: 5 µ^W/mm
Allowable background light
level
Ex
λp=940 nm
Background light:
“A” light source
2000
4000
-
*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 → H threshold illuminance) / (H → L threshold illuminance)
Unit
V
V
mA
mW
°C
°C
-
Unit
V
mA
V
V
µs
µs
µs
µs
µW/mm²
-
kHz
lx