My Inquiry
My Account
Broadcom Limited AFBR-735SMZ
- Part No.:
- AFBR-735SMZ
- Manufacturer:
- Broadcom Limited
- Category:
- Fiber Optic Transceiver Modules
- Package:
- Datasheet:
-
AFBR-735SMZ.pdf
- Description:
- SFP28 25G/10G MM GEN2 (AMP BAIL)
- Quantity:
- Payment:
- Shipping:
Inventory:2,744
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AFBR-735SMZ from Broadcom is a 25 Gb/s SFP28 optical transceiver with 850-nm VCSEL transmitter and PIN photodiode receiver, compliant with IEEE 802.3 25GBASE-SR and 10GBASE-SR over multi-mode fiber, featuring integrated CDR on both TX/RX paths, digital diagnostics per SFF-8472, and 3.3 V operation for Ethernet switch port interconnects.
For engineers reviewing the AFBR-735SMZ datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specifications, rate-select control logic, real-time DMI monitoring parameters, SFP28 mechanical compliance, and validated alternative transceivers for 25G/10G SR Ethernet deployments.
Technical Context
The AFBR-735SMZ implements dual-rate operation via hardware pins (Pin 7 for RX Rate Select, Pin 9 for TX Rate Select) and software register control (A2h byte 110 bit 3 / byte 118 bit 3), enabling CDR bypass at 10.3125 Gb/s and CDR engagement at 25.78125 Gb/s. Its transmitter uses a Class 1 eye-safe 850-nm VCSEL with integral light monitoring, while the receiver employs a high-speed PIN detector with post-amplification and CDR.
Digital diagnostic monitoring operates over a two-wire SFF-8419 interface (MOD_SCL/MOD_SDA), reporting real-time values for temperature (±3.0°C accuracy), supply voltage (±0.1 V), laser bias current (±10%), transmitted optical power (±3.0 dB), and received optical power (±3.0 dB), all mapped to standardized EEPROM address A2h memory space.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 25.78125 Gb/s (25GBASE-SR) or 10.3125 Gb/s (10GBASE-SR); dual-rate selection enables backward compatibility without host SerDes reconfiguration |
| Wavelength | 840–860 nm center; optimized for 50-µm OM3/OM4 multi-mode fiber with ≥86% encircled flux at 19 µm |
| Optical Power | Transmit: –8.4 to +2.4 dBm avg; Receive sensitivity: –10.3 dBm avg (25G), –11.1 dBm OMA (10G); supports up to 100 m on OM4 |
| Supply Voltage | 3.135–3.465 V; low-noise operation with ≤66 mV peak-peak PSNR requiring host board LC filtering per SFF-8432 |
| Operating Temp | 0°C to 70°C case temperature; industrial-grade thermal stability without extended-range (-40°C to 85°C) variant |
| Diagnostic Interface | SFF-8419 two-wire serial (400 kHz max); provides real-time access to 5 monitored parameters with defined EEPROM memory map at A2h |
| Power Consumption | ≤1.0 W; enables dense front-panel port configurations in 1U switches without thermal derating |
Pinout & Package
SFP28 form factor per SFF-8432, 20-pin edge connector with LC duplex optical interface conforming to ANSI TIA/EIA-604-10 (FOCIS 10A), 3.3 V single-supply operation, and RoHS-compliant packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 17, 20 | VeeT | Transmitter ground reference; three dedicated pins ensure low-impedance return path for high-speed TX signals |
| 2 | TX_FAULT | Open-drain fault indicator; pulled high externally (4.7–10 kΩ) to signal laser failure or thermal shutdown |
| 3 | TX_DISABLE | Active-high disable input; internally pulled up (5.6 kΩ); low = enabled, high/open = optical output disabled |
| 4, 5, 6 | MOD_SDA / MOD_SCL / MOD_ABS | Two-wire diagnostic interface; MOD_ABS grounded to indicate module presence; SDA/SCL require external pull-ups |
| 7, 9 | RS(0), RS(1) | Hardware rate select inputs; internally pulled down (40 kΩ); high = 25G (CDR enabled), low = 10G (CDR bypassed) |
| 8 | RX_LOS | Open-drain loss-of-signal indicator; pulled high externally; asserts when received power falls below –9.1 dBm avg |
| 12, 13 | RD–, RD+ | Differential receiver outputs; AC-coupled 100 Ω differential; 50–900 mV pk-pk swing into host SerDes termination |
| 15, 16 | VccR, VccT | Separate 3.3 V supplies for receiver and transmitter sections; decoupling required per Figure 4 |
| 18, 19 | TD+, TD– | Differential transmitter inputs; AC-coupled 100 Ω differential; accepts 40–1200 mV pk-pk, optimal 50–900 mV |
Key Features
| Feature | Design Value |
|---|---|
| Rate-selectable CDR | Hardware (Pin 7/9) and software (A2h registers) control of TX/RX CDR enable seamless 10G↔25G mode switching without host firmware changes |
| Real-time DMI monitoring | Five calibrated analog parameters (temp, Vcc, Tx bias, Tx power, Rx power) accessible via SFF-8419 interface with defined accuracy tolerances |
| Variable equalization/emphasis | Two-wire serial controlled EQ on TX input and emphasis on RX output optimize signal integrity across non-ideal PCB traces and connectors |
| Class 1 laser safety | Compliant with IEC 60825-1 and FDA CDRH; no external safety interlocks required for system integration |
| SFP28 mechanical compliance | Fully conforms to SFF-8432 dimensions and latch mechanism; interoperable with standard SFP28 cages and host board footprints |
Applications
| Ethernet Switch Port Interconnect | Server NIC Aggregation |
|---|---|
Use Scenario: Front-panel 25GbE uplink ports in top-of-rack (ToR) and spine switches connecting to server racks via OM4 fiber. IC Role / Device Role / Timing Role: Optical transceiver providing serial data conversion between switch ASIC's electrical interface and multi-mode fiber plant. Use Value: Enables 25Gbps per lane with <4.3 dB TDEC and 0.57 UI eye width, meeting IEEE 802.3by requirements for 100 m reach on OM4. | Use Scenario: Dual-port 25GbE NICs in cloud servers aggregating traffic to leaf switches using LC-terminated OM3/OM4 patch cords. IC Role / Device Role / Timing Role: Pluggable optical interface converting PCIe-based SerDes signals to optical domain with real-time health telemetry. Use Value: Digital diagnostics (temperature, supply, bias current) allow host OS to predict laser degradation and schedule proactive replacement before link failure. |
| Inter-Chassis Link Extension | Legacy 10G Infrastructure Upgrade |
Use Scenario: High-bandwidth inter-chassis links between modular chassis-based switches using multi-mode fiber trunk cables. IC Role / Device Role / Timing Role: Bidirectional optical transceiver supporting 25G line rate with CDR-enabled jitter cleanup on both TX and RX paths. Use Value: Integrated CDR cleans accumulated jitter from long PCB traces and backplane connectors, ensuring BER <10⁻¹² at 25.78 Gb/s. | Use Scenario: Gradual migration from 10GbE to 25GbE in existing data centers by reusing OM3 cabling infrastructure and SFP+ cages. IC Role / Device Role / Timing Role: Dual-rate transceiver operating in 10GBASE-SR mode (CDR bypassed) or 25GBASE-SR mode (CDR engaged) via pin-strapping. Use Value: Hardware rate select (Pin 7/9) allows field-upgradeable operation without host board redesign-no layout changes needed for 25G deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 25G/10G SR optical transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AFBR-709SMZ | 10GbE-only SFP+; no CDR, no 25G support, same 850-nm VCSEL and OM3/OM4 reach | Limited to 10G infrastructure; lacks DMI real-time monitoring and dual-rate flexibility | Select when cost-sensitive 10G-only links are sufficient and 25G upgrade path is not required |
| AFBR-79EQDZ | QSFP+ 40G SR4; 4×10G lanes, 850-nm VCSEL array, MPO-12 interface, higher power (1.5 W) | Designed for 40G Ethernet switches/NICs; incompatible mechanical form factor and electrical interface | Select for 40G aggregation where QSFP+ density and bandwidth outweigh SFP28 simplicity |
Compared with AFBR-735SMZ, AFBR-709SMZ offers lower cost and power for pure 10G use but lacks 25G capability and advanced diagnostics, while AFBR-79EQDZ delivers 4× bandwidth in QSFP+ format at higher thermal and layout complexity-neither is pin-compatible, but both serve adjacent segments of the same optical interconnect ecosystem.
Availability
AFBR-735SMZ is available at Aetrix Electronics and suitable for Ethernet switch port interconnects, server NIC aggregation, inter-chassis link extension, and legacy 10G infrastructure upgrades requiring stable component supply and full SFF-8472 diagnostic compliance.
Supply support for AFBR-735SMZ 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. is a global semiconductor leader specializing in wired and wireless communications infrastructure, with deep expertise in optical interconnect ICs and modules for data center and enterprise networking.
The AFBR-735SMZ belongs to Broadcom's SFP28 transceiver product line, engineered specifically for high-density, low-power 25GbE Ethernet applications in switches, NICs, and storage systems operating over multi-mode fiber.
FAQ
What data rates does the AFBR-735SMZ support, and how is rate selection implemented?
The AFBR-735SMZ supports both 10.3125 Gb/s (10GBASE-SR) and 25.78125 Gb/s (25GBASE-SR). Rate selection is implemented via hardware pins (Pin 7 for RX, Pin 9 for TX) and/or software register writes (A2h byte 110 bit 3 and byte 118 bit 3). When pins are low, CDR is bypassed for 10G operation; when high, CDR is engaged for 25G. The AFBR-735SMZ defaults to 10G at power-on.
Does the AFBR-735SMZ include digital diagnostic monitoring, and what parameters are reported?
Yes, the AFBR-735SMZ fully complies with SFF-8472 diagnostic monitoring. It reports five real-time parameters over the SFF-8419 two-wire interface: internal temperature (±3.0°C), supply voltage (±0.1 V), laser bias current (±10%), transmitted average optical power (±3.0 dB), and received average optical power (±3.0 dB), all mapped to standardized EEPROM addresses in the A2h memory page.
What is the optical interface type and fiber compatibility of the AFBR-735SMZ?
The AFBR-735SMZ uses an LC duplex optical connector conforming to ANSI TIA/EIA-604-10 (FOCIS 10A) and is optimized for 50-µm OM3 and OM4 multi-mode fiber. It achieves 100 m reach on OM4 at 25G and supports 300 m on OM3 at 10G, with encircled flux ≥86% at 19 µm ensuring modal launch compliance per IEEE 802.3by.
How does the AFBR-735SMZ handle power supply noise, and what filtering is required?
The AFBR-735SMZ specifies ≤66 mV peak-peak power supply noise rejection (PSNR) and requires host board LC filtering per Figure 4 of the datasheet. Inductors must have <0.5 Ω series resistance to limit voltage drop, and capacitors must be placed close to VccR/VccT pins. This ensures stable 3.3 V operation under high-speed switching conditions and meets SFF-8432 EMI requirements.
Is the AFBR-735SMZ compatible with standard SFP28 cages and host board layouts?
Yes, the AFBR-735SMZ fully complies with SFF-8432 mechanical specifications and SFF-8419 low-speed electrical interface definitions. Its 20-pin edge connector, latch mechanism, and footprint match industry-standard SFP28 cages. No PCB layout changes are required for integration-only correct host-side pull-up resistors (4.7–10 kΩ) on MOD_SCL/MOD_SDA/TX_FAULT/RX_LOS and proper power filtering per the datasheet.
AFBR-735SMZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Broadcom Limited
- Series:
- AFBR
- Packaging:
- Tray
- Product Status:
- Obsolete
- Data Rate:
- 25.78125Gbps
- Wavelength:
- 850nm
- Applications:
- Ethernet
- Voltage - Supply:
- 3.1V ~ 3.5V
- Connector Type:
- LC Duplex
- Mounting Type:
- Pluggable, SFP28
AFBR-735SMZ FAQ
1.How can I place an order for AFBR-735SMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AFBR-735SMZ 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 AFBR-735SMZ reliable?
The price and inventory of AFBR-735SMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AFBR-735SMZ is usually 5 days.
3.What payment methods are accepted for AFBR-735SMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AFBR-735SMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AFBR-735SMZ?
AFBR-735SMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AFBR-735SMZ 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 AFBR-735SMZ?
For technical support, including AFBR-735SMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AFBR-735SMZ requirements.
6.How does Aetrix verify that AFBR-735SMZ is sourced from the original manufacturer or authorized distributors?
All AFBR-735SMZ 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 AFBR-735SMZ meets industry standards.
7.What is the process for return or replacement of AFBR-735SMZ?
All AFBR-735SMZ units undergo pre-shipment inspection (PSI). If there is an issue with AFBR-735SMZ, 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 AFBR-735SMZ part is unused and in its original packaging.
Return procedure for AFBR-735SMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AFBR-735SMZ 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
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 …
