ITR9608 4-Pin Opto Interrupter DIP-4

ITR9608 4-Pin Opto Interrupter DIP-4 is a standard-size, highly reliable transmissive photo interrupter that provides non-contact sensing for position detection, presence sensing, and motion control. This device integrates an infrared light-emitting diode (LED) on one side and a phototransistor on the opposite side, separated by a 3mm gap. Consequently, when an opaque object passes through the gap, it interrupts the light beam, causing the phototransistor to switch state, which therefore generates a clear digital signal. The compact, 4-pin Dual In-line Package (DIP) easily mounts onto PCBs, making the ITR9608 an essential component for system designers requiring robust, high-speed switching capabilities in diverse industrial and commercial applications. Furthermore, its low profile and proven reliability make it an excellent choice for use in space-constrained electronic assemblies.

Key Features:

• Transmissive Sensing: The device features a source (LED) and sensor (Phototransistor) facing each other, creating a reliable optical beam for interruption detection.
• High-Speed Switching: The phototransistor output achieves fast rise and fall times, supporting high-frequency detection tasks such as rotary encoding.
• Daylight Blocking Filter: The phototransistor features a built-in filter, which effectively minimizes interference from ambient visible light and improves reliability.
• Gap Width: Offers a standard 3.0 mm sensing gap, accommodating a wide range of slotted wheels, flags, and cards for accurate position sensing.
• Compact DIP Package: The 4-pin package design simplifies through-hole mounting onto standard printed circuit boards (PCBs) and ensures robust mechanical connection.

Technical Specifications:

• Detection Method: Transmissive Type
• Sensing Gap Width: 3.0 mm
• LED Forward Current (I_F Max): 50 mA (Absolute Maximum Rating)
• Collector-Emitter Voltage (V_CEO Max): 30 V
• Collector Power Dissipation (P_C Max): 100 mW
• Collector Dark Current (I_CEO): Maximum 0.1 μA (When V_CE = 20V)
• Collector Current (I_C) Min: 0.5 mA (Tested at I_F = 20 mA, V_CE = 5 V)
• Operating Temperature Range: −25°C to +85°C

Mechanical Specifications:

• Package Style: DIP-4 (Dual In-line Package, Through-Hole)
• Housing Material: Opaque Plastic, Black
• Mounting Orientation: Vertical mounting on PCB
• Slot Depth: ≈ 4.0 mm

Dimensions:

• Body Length: ≈ 8.0 mm (Overall)
• Body Width: ≈ 7.0 mm (Overall)
• Body Height: ≈ 6.0 mm (Above PCB)
• Lead Pitch: 2.54 mm (Standard DIP spacing)

Pinout and Wiring:

• Pin 1 (Anode): Connect to V_CC via a current-limiting resistor to power the infrared LED.
• Pin 2 (Cathode): Connect to Ground (GND) to complete the LED circuit.
• Pin 3 (Collector): Connect to the positive supply (V_CC or V_OUT) through a pull-up resistor (R_L) to establish the output voltage.
• Pin 4 (Emitter): Connect directly to Ground (GND).
• Output Note: Therefore, the output is active-low: the output voltage (V_OUT at pin 3) will be low when the beam is clear, and high when the beam is interrupted.

Datasheet Reference:

• Download ITR9608 Opto Interrupter Datasheet

Commonly Used in:

• Printers and Copiers: Used for paper end detection, cartridge position sensing, and timing in paper feed mechanisms.
• Vending Machines: Essential for coin detection, bill validation, and product drop sensing.
• Factory Automation: Provides reliable limit sensing, object counting, and position verification on assembly lines.

Applications:

• Rotary Encoders: Precisely detects speed and direction when paired with slotted wheels in motors and robotics.
• Pulse Generators: Creates digital pulses for timing circuits by detecting movement of a flag or stripe.
• Security Systems: Functions as a simple, non-contact switch for door and lid closure detection.

Equivalent Models:

• LTA-204HD: A functionally equivalent transmissive photo interrupter with similar dimensions and electrical characteristics.
• H206: Another industry-standard 4-pin slotted interrupter offering comparable performance metrics.
• OPB815L: However, this model sometimes requires slight adjustment to drive circuitry due to minor variations in photo-current output.

Package Includes:

• 1 x ITR9608 4-Pin Opto Interrupter (DIP-4)