My Inquiry
My Account
Broadcom Limited ABCU-5731RZ
- Part No.:
- ABCU-5731RZ
- Manufacturer:
- Broadcom Limited
- Category:
- Fiber Optic Transceiver Modules
- Package:
- Datasheet:
-
ABCU-5731RZ.pdf
- Description:
- TXRX OVER CAT 5 CBL 1.25GBD
- Quantity:
- Payment:
- Shipping:
Inventory:3,433
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ABCU-5731RZ from Broadcom (formerly Avago Technologies) is a 10/100/1000BASE-T SFP electrical transceiver supporting full-duplex 1.25 Gb/s operation over Category 5 twisted-pair cable using 5-level PAM signaling. It integrates SerDes, DSP, and magnetics in an industry-standard SFP form factor, operates from a single +3.3 V supply, and features SGMII interface with RX_LOS enabled for link-up/down indication. It targets switch-to-switch and backplane Gigabit Ethernet interfaces in commercial-temperature (-5~70 °C) systems.
For engineers reviewing the ABCU-5731RZ datasheet, pinout, applications, or equivalent options, key selection considerations include its SGMII host compatibility, integrated RJ-45/magnetics, 20-pin SFP mechanical interface, -5~70 °C operating range, and RX_LOS-enabled link status signaling - all critical for embedded switch fabric and industrial networking designs requiring copper-based 1 GbE pluggable connectivity.
Technical Context
The ABCU-5731RZ implements IEEE 802.3ab-compliant 1000BASE-T physical layer functionality with auto-negotiation per Clauses 28 (twisted pair) and 37 (1000BASE-X), enabling interoperability with legacy and modern PHYs. Its internal ASIC supports register-level control via 2-wire serial interface (AT24C01A-compatible EEPROM at address A0), including Auto-Negotiation Advertisement (Register 4) and Link Partner Ability (Register 5) registers.
It delivers differential TX input swing of 330–2400 mV and RX output swing of 370–2000 mV into 100 Ω differential loads, compatible with CML/LVPECL SerDes I/O standards. Power delivery follows MSA-recommended filtering (1 μH inductors, 0.1–10 μF capacitors), with typical supply current of 350–370 mA and power dissipation of 1100–1150 mW at 3.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 1.25 Gb/s - matches SGMII line rate for seamless integration with MAC/SerDes without retiming |
| Supply Voltage | +3.3 V ±5% - single-rail operation simplifies host board power design |
| Operating Temperature | -5 to +70 °C - commercial-grade thermal envelope for enterprise switch environments |
| Link Distance | Up to 100 m over Cat 5 UTP/STP - meets IEEE 802.3ab specification for structured cabling |
| RX_LOS Function | Enabled - provides TTL-level link-up/down indicator (not AC-coupled loss detection) |
| Interface Standard | SGMII host interface - eliminates need for external clock recovery and reduces pin count vs. GMII |
| Compliance | IEEE 802.3ab, RoHS-6, FCC Part 15 Class B, CENELEC EN55022 Class B - ensures regulatory readiness |
Pinout & Package
ABCU-5731RZ uses the standard 20-pin SFP module footprint defined by the SFP Multi-Source Agreement (MSA), with metal housing and integrated RJ-45 connector featuring built-in magnetics. The package is mechanically compatible with any MSA-compliant SFP cage.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 17, 20 | VEET | Transmitter ground reference - three dedicated pins ensure low-impedance return path for TD+/TD- signals |
| 9, 10, 11, 14 | VEER | Receiver ground reference - four pins minimize ground bounce on RD+/RD- outputs |
| 15 | VCCR | Receiver power supply - 3.3 V ±5% input powering SerDes receive path and internal logic |
| 16 | VCCT | Transmitter power supply - independent 3.3 V ±5% rail for PAM-5 line driver and DSP core |
| 12, 13 | RD-, RD+ | Differential receiver outputs - ac-coupled, internally terminated 100 Ω lines compatible with CML/LVPECL SerDes inputs |
| 18, 19 | TD+, TD- | Differential transmitter inputs - accept 330–2400 mV differential swing; ac-coupling and termination internal to module |
| 3 | TX_DISABLE | Reset control input - high or open places ASIC in reset; pulled up internally with 4.7 kΩ resistor |
| 8 | LOS | Link status output - high = link up (SGMII mode); tied to 100 Ω resistor when disabled (not applicable here) |
| 4, 5 | MOD-DEF2, MOD-DEF1 | 2-wire serial ID interface - clock and data lines for EEPROM read/write (AT24C01A-compatible protocol) |
| 6 | MOD-DEF0 | Module presence detect - grounded internally via 100 Ω resistor to signal insertion to host |
Key Features
| Feature | Design Value |
|---|---|
| Integrated RJ-45 + magnetics | Eliminates external magnetics and connector layout complexity; enables direct Cat 5 cable attachment |
| SGMII host interface | Reduces MAC-to-PHY pin count by >50% vs. GMII; supports embedded clocking and simplified PCB routing |
| Auto-negotiation (Clause 28/37) | Enables interoperability with 10/100/1000BASE-T devices and 1000BASE-X links without manual configuration |
| Hot-pluggable 3-stage pin sequencing | Ensures ESD-safe insertion/removal: ground → power → signal sequence prevents latch-up or damage |
| Onboard SerDes/DSP | Performs full 1000BASE-T encoding/decoding, PAM-5 modulation, echo cancellation, and adaptive equalization |
Applications
| Switch-to-Switch Interface | Switched Backplane |
|---|---|
Use Scenario: Interconnecting Layer 2/L3 switches in enterprise campus or data center aggregation layers using unshielded twisted-pair infrastructure. IC Role / Device Role / Timing Role: Electrical PHY transceiver bridging SGMII from switch ASIC to 1000BASE-T copper medium. Use Value: Enables cost-effective, low-latency 1 GbE interconnect without optical modules or external magnetics - reducing BOM and layout area by ~30%. |
Use Scenario: High-density modular switch chassis where line cards plug into a shared backplane with copper traces. IC Role / Device Role / Timing Role: SFP-mounted PHY providing 1000BASE-T compliance on backplane-facing ports with integrated signal conditioning. Use Value: Supports 100 m reach over backplane traces meeting TIA-568-C Cat 5 specs, eliminating need for proprietary backplane protocols. |
| File Server NIC Interface | Industrial Control Network Edge |
Use Scenario: Adding 1 GbE copper uplink capability to rack-mounted file servers or NAS appliances via SFP cage. IC Role / Device Role / Timing Role: Copper transceiver translating server-side SGMII to standardized 1000BASE-T for connection to top-of-rack switches. Use Value: Delivers plug-and-play 1 GbE connectivity with auto-negotiation and link fault detection - no driver or firmware changes required. |
Use Scenario: Connecting programmable logic controllers (PLCs) or HMIs to factory floor Ethernet networks using existing Cat 5 infrastructure. IC Role / Device Role / Timing Role: Robust 1000BASE-T PHY with ESD-hardened RJ-45 interface and industrial-grade immunity (8 kV contact ESD). Use Value: Maintains reliable link under electrically noisy conditions while meeting UL/cUL safety and RoHS-6 environmental requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 1000BASE-T SFP electrical transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ABCU-5731ARZ | Same functionality but rated for -40~85 °C industrial temperature range; higher thermal derating margin | Required for outdoor enclosures, transportation systems, or uncontrolled ambient deployments | Select ABCU-5731ARZ only if ambient exceeds 70 °C or requires extended temperature qualification |
| ABCU-5741RZ | Identical package, timing, and electrical specs except RX_LOS disabled (LOS pin grounded via 100 Ω) | Suitable when host system uses alternative link detection (e.g., register polling or MAC-layer status) | Choose ABCU-5741RZ only if LOS signal is unused - avoids unnecessary GPIO allocation on host controller |
Compared with ABCU-5731RZ, ABCU-5731ARZ adds industrial temperature support at higher cost and power margin, while ABCU-5741RZ removes the LOS output to simplify host interface - neither offers pin-to-pin or functional replacement without verifying thermal or monitoring requirements.
Availability
ABCU-5731RZ is available at Aetrix Electronics and suitable for switch-to-switch interconnect, switched backplane architectures, and file server NIC applications requiring stable component supply, long-term lifecycle assurance, and MSA-compliant SFP sourcing.
Supply support for ABCU-5731RZ 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 leader in semiconductor solutions for wired and wireless communications, networking, and storage infrastructure.
The ABCU-57xxxxZ family was designed specifically for cost-sensitive, space-constrained Gigabit Ethernet applications requiring copper-based SFP connectivity - targeting enterprise switching, industrial networking, and embedded systems where optical transceivers are unnecessary or prohibitively expensive.
FAQ
What is the operating temperature range of the ABCU-5731RZ?
The ABCU-5731RZ is specified for commercial-temperature operation from -5 °C to +70 °C. This range aligns with typical enterprise switch and server environments where ambient airflow and enclosure design maintain stable thermal conditions. It is not rated for industrial (-40~85 °C) use - for those applications, the ABCU-5731ARZ variant must be selected. Thermal derating begins above 70 °C, and sustained operation outside this range may impact reliability or compliance.
Does the ABCU-5731RZ require external magnetics or an RJ-45 connector?
No. The ABCU-5731RZ integrates a custom RJ-45 connector with fully compliant magnetics inside the SFP housing. This eliminates the need for external transformers, common-mode chokes, or discrete connectors on the host board - reducing component count, PCB area, and EMI tuning effort. Host design only requires proper SFP cage mounting and 20-pin edge connector routing.
How does the RX_LOS function differ on the ABCU-5731RZ compared to optical SFP modules?
On the ABCU-5731RZ, RX_LOS is a digital link-up/link-down indicator (TTL logic level), not an analog signal-loss detector. It asserts high when a valid 1000BASE-T link is established after auto-negotiation completes - making it functionally equivalent to a "link status" GPIO. In contrast, optical SFPs use RX_LOS to indicate actual received optical power below threshold. This behavior is confirmed in Note 4 of Table 2 and applies exclusively to ABCU-573xxxZ models.
What host interface protocol does the ABCU-5731RZ support?
The ABCU-5731RZ supports SGMII (Serial Gigabit Media Independent Interface) as its primary host interface. It accepts differential TX data (TD+/TD-) and outputs differential RX data (RD+/RD-) at 1.25 Gb/s, with embedded clocking and no requirement for separate reference clocks. It does not support GMII, RGMII, or MII directly - conversion would require an external SerDes or MAC with SGMII capability.
Is the ABCU-5731RZ hot-pluggable, and what safeguards does it include?
Yes, the ABCU-5731RZ is fully hot-pluggable per SFP MSA specifications. It employs controlled 3-stage pin sequencing: module ground pins make contact first, followed by power (VCCR/VCCT), then signal pins (RD+/RD-, TD+/TD-, etc.). This sequence prevents ESD damage, power rail contention, and signal glitches during insertion/removal - verified by MIL-STD-883C and IEC 61000-4-2 testing (Class 2 ESD, 8 kV contact discharge).
ABCU-5731RZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Broadcom Limited
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Data Rate:
- 1.25Gbd
- Wavelength:
- -
- Applications:
- Switch Interfacing
- Voltage - Supply:
- 3.3V
- Connector Type:
- RJ45
- Mounting Type:
- Pluggable, SFP
ABCU-5731RZ FAQ
1.How can I place an order for ABCU-5731RZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ABCU-5731RZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ABCU-5731RZ reliable?
The price and inventory of ABCU-5731RZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ABCU-5731RZ is usually 5 days.
3.What payment methods are accepted for ABCU-5731RZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ABCU-5731RZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ABCU-5731RZ?
ABCU-5731RZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ABCU-5731RZ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ABCU-5731RZ?
For technical support, including ABCU-5731RZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ABCU-5731RZ requirements.
6.How does Aetrix verify that ABCU-5731RZ is sourced from the original manufacturer or authorized distributors?
All ABCU-5731RZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ABCU-5731RZ meets industry standards.
7.What is the process for return or replacement of ABCU-5731RZ?
All ABCU-5731RZ units undergo pre-shipment inspection (PSI). If there is an issue with ABCU-5731RZ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ABCU-5731RZ part is unused and in its original packaging.
Return procedure for ABCU-5731RZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ABCU-5731RZ Tags
-
AFBR-5972EZ
Broadcom Limited
-
AFBR-5972BZ
Broadcom Limited
-
FTLF8519P3BNL
Coherent
-
AFBR-5803Z
Broadcom Limited
-
AFBR-5803TZ
Broadcom Limited
-
FTLF8519P3BTL
Coherent
-
AFBR-5803ATZ
Broadcom Limited
-
AFBR-5803ATQZ
Broadcom Limited
-
FTLX8574D3BCV
Coherent
-
FTLF8526P3BNL
Coherent
-
FTLF8519F2GCL
Coherent
-
FTLF1318P3BTL
Coherent
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
