HFD3020

m o HFD3020 .c U 4 t e e h S a at .D w w w TTL Output Receiver FEATURES Converts fiber optic input signals to TTL digital outputs Typical sensitivity 500 nW peak (-33 dBm) Single 5 V supply requirement Edge detection circuitry gives 20 dB minimum dynamic range, low Pulse Width Distortion Operates up to 10 Mbps NRZ Plastic cap with TO-18 header Available in metal package (HFD3000) DESCRIPTION The HFD3020 is a sensitive differentiating optical receiver designed for use in short distance, 850 nm fiber optic systems. The receiver uses a hybrid construction consisting of a PIN photodiode, bipolar integrated receiver circuit with internal voltage regulation and external bypass capacitor. The TTL output allows the HFD3020 to be interfaced directly with standard TTL circuits. It is supplied in a Honeywell plastic package, and can be mounted in several fiber optic connectors. Companion optical transmitters are available. APPLICATION Digital HFD3020 fiber optic receivers convert the optical signal in a point to point data communications fiber optic link to a TTL output. The receiver is designed to be mounted in a fiber optic connector that aligns the optical axis of the component to the axis of the optical fiber. Its PIN photodiode is mechanically centered within the TO-18 package. Electrical isolation is important in obtaining the maximum performance of this high sensitivity receiver. A 0.1 µF ceramic capacitor must be connected between pin #1 and pin #4. This minimizes...