SY88432LMG Microchip Integrated Circuit (Quad Flat No-Lead) In Stock
SY88432LMG is a 3.3 V optical transceiver IC from Microchip integrating a limiting post-amplifier and laser diode driver supporting data rates up to 4.25 Gbps, designed for SDH and SONET fiber optic systems. Packaged in a 24-pin VQFN, it delivers a compact single-chip solution for optical module transmitter and receiver signal conditioning.
- Manufacturer
- Microchip
- Package
- Quad Flat No-Lead
- Pin Count
- 24
- Lifecycle
- OBSOLETE
- Datasheet
- SY88432LMG Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Integrated limiting post-amplifier and laser diode driver
- Supports data rates up to 4.25 Gbps
- 3.3 V single-supply operation
- Optimized for SDH and SONET optical transceiver applications
- 24-pin VQFN package with exposed heat slug for thermal management
- Differential CML I/O for low-noise high-speed signal integrity
Applications
The SY88432LMG is used in fiber optic transceiver modules for SDH/SONET telecom equipment, including OC-12 (622 Mbps), OC-48 (2.5 Gbps), and OC-96 (4.25 Gbps) line cards in metro and long-haul optical networks. It also suits Fibre Channel storage area network (SAN) modules and DWDM transponders where a compact single-chip front-end integrating both the laser driver and received signal amplifier is required.
Specifications
| Manufacturer Package Code | VQFN-24 |
| YTEOL | 0 |
| Applications | SDH; SONET |
| JESD-30 Code | S-XQCC-N24 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Package Body Material | UNSPECIFIED |
| Package Equivalence Code | LCC24,.16SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Supply Current-Max | 130mA |
| Supply Voltage-Nom | 3.3V |
| Surface Mount | YES |
| Telecom IC Type | ATM/SONET/SDH SUPPORT CIRCUIT |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the SY88432LMG achieve 4.25 Gbps operation while limiting power consumption?
The SY88432LMG operates from a single 3.3 V supply and uses current-mode logic (CML) differential I/O to achieve 4.25 Gbps data rates with minimal power dissipation. The integrated limiting post-amplifier restores degraded received optical signals to full swing, while the laser driver controls modulation current precisely, reducing the number of external components and lowering total module power compared to discrete implementations.
Which SONET/SDH line rates does the SY88432LMG support and how does this match common network deployments?
The SY88432LMG supports serial data rates up to 4.25 Gbps, covering SONET OC-3 (155 Mbps), OC-12 (622 Mbps), OC-48 (2.5 Gbps), and OC-96 (4.25 Gbps) standards. This range encompasses the majority of deployed SDH STM-1 through STM-64 metropolitan and long-haul links, making the device suitable for multi-rate transceivers that must interoperate across different network tiers without hardware changes.
How does the exposed heat slug in the VQFN-24 package benefit thermal management in a dense optical module?
The 24-pin VQFN package includes an exposed metal slug on the bottom that conducts heat directly to the PCB copper pour, providing a thermal resistance significantly lower than standard QFP packages. In optical transceiver modules where multiple high-speed ICs are packed into a few square centimeters, this feature keeps junction temperature well below the 125°C maximum even at 4.25 Gbps full-rate operation, extending component lifetime.
Can the SY88432LMG be used in Fibre Channel SAN modules in addition to SONET systems?
Yes, the SY88432LMG supports 4.25 Gbps, which aligns with 4G Fibre Channel (4GFC) operating at approximately 4.25 Gbps line rate used in storage area networks. The device's differential CML interface, 3.3 V supply, and integrated laser driver and post-amplifier make it a drop-in solution for SFP and SFP+ module designs supporting both SONET OC-96 and 4GFC standards within the same hardware platform.
Related Guides
How to Choose a USB Controller: Certification, Integration, and SDK Quality Compared Across Microchip, STMicroelectronics, NXP, TI, and Renesas
Compare USB controllers from Microchip, STM, NXP, TI, and Renesas across certification difficulty, integration ease, and documentation/SDK quality to choose the right IC for your design.
May 28, 2026
ADAU1361BCPZ Application Note: Audio Codec Design Guide for Embedded Systems
Complete design guide for the ADAU1361BCPZ stereo 96kHz/24-bit audio codec: power supply filtering, PLL startup sequence, PCB layout, SigmaDSP integration, and troubleshooting.
May 28, 2026
LM66100QDCKRQ1 Design Guide: Ideal Diode and Reverse Polarity Protection for Automotive Power Rails
Complete application note for the LM66100QDCKRQ1 AEC-Q100 ideal diode controller: PMOS selection, threshold tuning, RPP integration, layout, and automotive design pitfalls.
May 28, 2026
LM2904BQDGKRQ1 Selection Guide: Automotive Dual Op-Amp Variants, Packages, and Alternatives
How to choose the right LM2904BQ automotive dual op-amp variant: AEC-Q100 grade, offset voltage, package, and non-automotive alternatives explained.
May 27, 2026
Why Buy from FindMyChip
About Microchip
Microchip is a leading electronic component manufacturer. FindMyChip sources Microchip ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
More from Microchip
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”