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AFBR-2529RZ

AFBR-2529RZ - 50MBd Versatile Link Fiber Optic Receiver | Broadcom

The Broadcom AFBR-2529RZ is a 50 MBd fiber optic receiver in the AFBR-2500 series Versatile Link (VL) family, designed for use with 1 mm Polymer Optical Fiber (POF) and 200 µm Hard Clad Silica (HCS) fiber. Packaged in a horizontal inverting conductive-housing module with 4-pin DIP-form connector interface, the part operates from a single 3.3 V (typical) supply and supports data rates from DC up to 50 MBd. A fiber optic receiver is an optoelectronic device that converts incoming light pulses transmitted through an optical fiber into a corresponding electrical signal. Receivers in the Versatile Link family sit in the broader hierarchy of fiber optic components, which also include transmitters, transceivers, and photo-diodes. They are widely used as the receiving end of short-reach, EMI-immune point-to-point links in industrial and automotive environments, where galvanic isolation and noise immunity outweigh the cost premium of optical cabling. Key features of the AFBR-2529RZ include an integrated PIN photodiode with internal transimpedance amplifier (TIA), TTL-compatible logic output, inverting output polarity (logic LOW when light is present), DC-coupled data path, and a conductive internal housing for EMI/RFI shielding. The receiver is rated for operation from 0 °C to +70 °C, supports link distances up to 50 m on POF (with 1 dB/m loss fiber) and longer on HCS, and ships in a RoHS-compliant Pb-free package qualified to Broadcom's industrial-grade reliability flow. Architecturally, the part uses a silicon PIN photodiode coupled to a bipolar transimpedance front-end, followed by a limiting amplifier that produces a clean TTL output swing on every received bit. An internal optical lens molded into the Versatile Link housing maximizes coupling efficiency and tolerates up to ±0.5 dB of mechanical misalignment with the mating AFBR-1529RZ transmitter or equivalent. Compared to discrete photodiode + op-amp designs, the AFBR-2529RZ integrates bias network, supply decoupling, and shield ground in a single connectorized module, simplifying PCB layout. Typical applications include industrial control busses (Profibus, DeviceNet, ASI), factory automation links, voltage-isolated data acquisition, gaming machines, and automotive infotainment or battery-management point-to-point links. Pairing the AFBR-2529RZ with the complementary AFBR-1529RZ transmitter forms a complete galvanically isolated optical data link without external components beyond a single bypass capacitor. When designing with this part, place a 0.1 µF ceramic bypass capacitor within 5 mm of the VCC pin and stitch the conductive housing shield to chassis ground through the locking connector tabs. The receiver's inverting output is intended for direct connection to a TTL/LVTTL input; an external Schmitt-trigger buffer is recommended if the receiving MCU is CMOS-only with a VCC > 3.3 V. Avoid routing the optical fiber through tight bends below the 25 mm minimum bend radius to prevent permanent attenuation damage. This page synthesizes distributor pricing, drop-in alternatives within the same Versatile Link housing, and practical design notes not found in the manufacturer datasheet alone, giving engineers a one-stop view of the AFBR-2529RZ's role, fits, and replacements.