Broadcom Limited AFBR-5805AZ

Overview

AFBR-5805AZ from Broadcom (formerly Avago Technologies) is a SONET OC-3 / SDH STM-1 ATM optical transceiver with 1300 nm InGaAsP LED transmitter and InGaAs PIN photodiode receiver, operating at 155.52 MBd over multimode fiber. It supports dual supply voltages (3.135–3.5 V or 4.75–5.25 V), delivers –19 dBm min BOL output power into 62.5/125 µm fiber, and is rated for –10°C to +85°C ambient operation. It is used in telecom backbone and wiring closet-to-desktop ATM links.

For engineers reviewing the AFBR-5805AZ datasheet, pinout, applications, or equivalent options, key selection considerations include its 1×9 SIP package with SC/ST receptacle options, PECL-compatible differential data I/O, signal detect functionality, optical power budget compliance with ANSI T1E1.2 for 2 km multimode links, and ESD robustness per MIL-STD-883C Class 2.

Technical Context

The AFBR-5805AZ implements a full SONET OC-3 physical layer interface using a custom silicon driver IC that converts differential PECL inputs (ECL-referenced to +3.3 V or +5.0 V) into analog LED drive current, and a transimpedance preamplifier + quantizer IC chain delivering differential PECL data output and single-ended signal detect. Its optical subsystem uses low-aging 1300 nm LEDs and optimized lensing for stable BOL-to-EOL performance.

It complies with ATM Forum UNI SONET OC-3 multimode fiber specification and ANSI T1E1.2 Annex B system jitter allocations-contributing ≤1.2 ns p-p systematic jitter and ≤0.69 ns p-p random jitter at transmitter, ≤1.2 ns p-p and ≤1.91 ns p-p respectively at receiver-enabling BER ≤1×10⁻¹⁰ over defined optical input power ranges.

Key Specifications

Pinout & Package

The AFBR-5805AZ uses a 1×9 single-in-line package (SIP) with two solder posts for mechanical anchoring and nine electrical pins arranged linearly. The housing accommodates either a duplex SC or duplex ST optical receptacle. Pin 1 (VEE) and Pin 9 (VEE) are ground references; Pins 2–3 (RD) and 7–8 (TD) are differential receiver and transmitter data lines; Pin 4 (SD) is single-ended signal detect; Pins 5–6 (VCC) are dual power supply inputs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SONET OC-3 optical transceiver applications.

Compared with AFBR-5805Z and AFBR-5805TZ, the AFBR-5805AZ uniquely combines extended –10°C to +85°C operation with SC receptacle compatibility - making it the sole option for thermally demanding ATM edge deployments requiring duplex SC connectivity and full SONET OC-3 compliance.

Availability

AFBR-5805AZ is available at Aetrix Electronics and suitable for ATM backbone links, SDH network interface cards, and SONET add-drop multiplexers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AFBR-5805AZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Broadcom Inc. (acquired Avago Technologies in 2016) is a global semiconductor leader specializing in wired infrastructure, optical networking, and enterprise connectivity solutions.

The AFBR-5800Z family was designed specifically for cost-sensitive, high-volume SONET OC-3/SDH STM-1 multimode fiber applications - emphasizing manufacturability, thermal robustness, and multisource 1×9 SIP compatibility.

FAQ

What is the operating temperature range of the AFBR-5805AZ?

The AFBR-5805AZ is rated for ambient operating temperatures from –10°C to +85°C, corresponding to a transceiver case temperature range of –10°C to +100°C with adequate airflow. This extended range distinguishes it from the AFBR-5805Z (0°C to +70°C) and supports deployment in uncontrolled telecom enclosures or industrial edge locations where thermal margins are critical. The AFBR-5805AZ maintains full SONET OC-3 compliance across this entire range.

Does the AFBR-5805AZ support both +3.3 V and +5.0 V supply voltages?

Yes, the AFBR-5805AZ operates with either 3.135–3.5 V or 4.75–5.25 V supply voltage, and all I/O (TD, RD, SD) are PECL-compatible with ECL referencing shifted to the applied VCC. No external level-shifting circuitry is needed. The AFBR-5805AZ's internal driver and quantizer ICs auto-adapt to the selected rail, maintaining consistent rise/fall times and jitter performance across both voltage modes.

What optical fiber types and distances is the AFBR-5805AZ qualified for?

The AFBR-5805AZ is fully compliant with ANSI T1E1.2 for 2 km multimode fiber links using 62.5/125 µm (OM1) or 50/125 µm (OM2) fiber. Its BOL optical power (–19 dBm min into 62.5/125 µm) and receiver sensitivity (–35 dBm min) deliver ≥12 dB power budget - sufficient to cover fiber attenuation, connector loss, splice loss, and 1 dB aging margin. It is not qualified for single-mode fiber or distances beyond 2 km.

How does the signal detect (SD) function work on the AFBR-5805AZ?

The AFBR-5805AZ provides a single-ended PECL signal detect (SD) output that asserts high when received optical power exceeds –31 dBm and deasserts low below –45 dBm, with 1.5 dB hysteresis to prevent chatter near threshold. SD is referenced to VCC and terminated to VCC – 2 V with 50 Ω. This function enables link-up/down status monitoring in ATM PHYs without requiring full data recovery - a key diagnostic feature used in network management and fault isolation.

Is the AFBR-5805AZ pin-compatible with other members of the AFBR-5800Z family?

Yes, the AFBR-5805AZ shares identical 1×9 SIP pinout, mechanical footprint, and electrical interface with AFBR-5805Z, AFBR-5805TZ, and AFBR-5805ATZ. All use Pins 1/9 (VEE), 2/3 (RD), 4 (SD), 5/6 (VCC), and 7/8 (TD). Differences are limited to operating temperature range and optical receptacle type (SC vs. ST), allowing drop-in replacement in existing layouts - provided thermal and mechanical interface requirements are met.