STS-8857 Datasheet, PDF (1/1 Pages) Silonex Inc. – Transmissive Switch Assembly

STS-8857
Transmissive Switch Assembly
Features
• Non contact switching
• Three wires for electrical connection
• Fast switching speed
Description
The STS-8857 consists of an infrared emitting diode
and an NPN silicon phototransistor mounted on
opposite sides of a 3.8 mm wide slot. Phototransistor
switching takes place whenever an opaque object
passes through the slot. The polysulfone housing (2)
reduces interference from ambient light and provides
dirt and dust protection. The 40 cm minimum length
wires simplify the connection to the PC board.
Absolute Maximum Ratings
Operating & Storage Temperature
-40°C to +85°C
Input Diode
Reverse Voltage
Continuous Forward Current
Peak Forward Current (1µs pulse)
Power Dissipation (1)
3V
50 mA
3A
100 mW
Phototransistor
Collector-Emitter Voltage
Emitter-Collector Voltage
Power Dissipation (1)
30 V
5V
100 mW
7.6
6.3
15.5
3.8
18.3
Dimensions in mm. (-/+ 0.12)
3.8
14.5
Optical center-line
3.4
9.0
11.7
18.3
Wires are omitted
Wire
3.3
for clarity
Brown
Red
Schematic
Black
Notes:
(1) Derate linearly 1.33 mW/°C above 25°C.
(2) Plastic housing is soluble in chlorinated
hydrocarbons and ketones. Recommended
cleaning agents are methanol or isopropanol.
Electrical Characteristics (T_A=25°C unless otherwise noted)
Symbol
Parameter
Min Typ
Input Diode
V_F
Forward Voltage
1.2
I_R
Reverse Current
Output Phototransistor
I_CEO Collector Dark Current
BV_CEO Collector-Emitter Breakdown Voltage 30
BV_ECO Emitter-Collector Breakdown Voltage 5
Coupled
V_CE(SAT) Collector Emitter Saturation Voltage
I_C(ON) On-State Collector Current
1.5
Specifications subject to change without notice
Max
1.7
10
100
0.4
Units
Test Conditions
V I_F = 20 mA
µA VR = 3 V
nA V_CE=10V, Ee=0
V I_C=100µA, Ee=0
V I_C=100µA, Ee=0
V I_C=100µA, I_F = 20 mA
mA V_CE =10V, I_F = 20 mA
103057 REV 1
5200 St. Patrick St., Montreal
Que., H4E 4N9, Canada
Tel: [phone]
Fax: [phone]
QF-84
The Old Railway, Princes Street
Ulverston, Cumbria, LA12 7NQ, UK
Tel: [phone]
Fax: [phone]