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Analog Devices Inc./Maxim Integrated MAX3885ECB
- Part No.:
- MAX3885ECB
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Serializers, Deserializers
- Package:
- 64-LQFP
- Datasheet:
-
MAX3885ECB.pdf
- Description:
- DESERIALIZER WITH LVDS OUTPUTS
- Quantity:
- Payment:
- Shipping:
Inventory:1,121
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Product details
Overview
The MAX3885ECB from Maxim Integrated is a 2.488Gbps SDH/SONET 1:16 deserializer IC that converts high-speed serial data to 16-bit parallel LVDS outputs, operates from a single +3.3V supply, features self-biasing PECL inputs and LVDS synchronization inputs, and is used in optical transport add/drop multiplexers.
For engineers reviewing the MAX3885ECB datasheet, MAX3885ECB pinout, MAX3885ECB application, or MAX3885ECB equivalent, key selection criteria include serial-to-parallel conversion rate (2.488Gbps → 155Mbps), LVDS output compliance, -40°C to +85°C extended temperature operation, and TQFP-64 package compatibility with SDH/SONET framer interfaces.
Technical Context
The MAX3885ECB implements a 16-bit shift register clocked on the positive edge of a 2.488GHz PECL serial clock (SCLK), a 4-bit counter dividing SCLK by 16 to generate PCLK, and a parallel-output register updated on the negative edge of PCLK. It supports realignment via LVDS SYNC+/- pulses requiring ≥4 SCLK cycles.
Its PECL inputs (SD+/SD-, SCLK+/SCLK-) use internal self-biasing networks enabling 53Ω termination to VCC–2V, while LVDS outputs (PD0± to PD15±, PCLK±) require external 100Ω differential termination and deliver 250–400mV differential swing per IEEE 1596.3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Serial Data Rate | 2.488Gbps - matches STM-16/OC-48 line rate for SDH/SONET transmission systems |
| Parallel Output Width | 16-bit - delivers one byte plus overhead bits per PCLK cycle at 155Mbps clock rate |
| Supply Voltage | +3.3V ±0.3V - single-rail operation compatible with standard telecom logic supplies |
| Operating Temperature | -40°C to +85°C - qualified for industrial and outdoor telecom equipment environments |
| Power Dissipation | 660mW typical - enables thermal management in dense optical line card layouts |
| Differential Output Swing | 250–400mV - meets LVDS standard for noise-immune interconnect to FPGAs or ASICs |
| Input Termination | 53Ω to VCC–2V for PECL - eliminates need for external bias voltage sources |
Pinout & Package
The MAX3885ECB is housed in a 64-pin Thin Quad Flat Package (TQFP) with exposed pad, measuring 10mm × 10mm × 1.4mm, compliant with JEDEC MO-159 and RoHS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SD+, SD- | PECL Serial Data Input Pair | Differential input accepting 2.488Gbps NRZ data; self-biased for AC-coupled PECL source interface |
| SCLK+, SCLK- | PECL Serial Clock Input Pair | Provides timing reference for shift register; positive-edge triggered, requires matched trace length |
| SYNC+, SYNC- | LVDS Synchronization Input Pair | Triggers bit-slip realignment; pulse ≥4 SCLK cycles to drop first bit and reframe parallel output |
| PCLK+, PCLK- | LVDS Parallel Clock Output Pair | 155MHz clock derived from SCLK/16; negative-edge aligned to latch PD0–PD15 outputs |
| PD0+ to PD15+ | LVDS Parallel Data Output Noninverting | 16-bit wide parallel bus; each pair drives 100Ω differential load with 250–400mV swing |
| PD0- to PD15- | LVDS Parallel Data Output Inverting | Complementary outputs ensuring common-mode rejection and EMI reduction in backplane routing |
| VCC (pins 3,5,7,9,11,13,25,34,42,47,56) | +3.3V Supply | 11 dedicated power pins reduce IR drop and improve PSRR across high-frequency switching |
| GND (pins 1,2,8,16,17,24,32,33,41,48,49,57,64) | Ground | 13 ground pins provide low-inductance return paths for all I/O banks and core logic |
Key Features
| Feature | Design Value |
|---|---|
| LVDS Outputs with 100Ω Termination Support | Enables direct connection to FPGA/ASIC LVDS receivers without level-shifting or external resistors on PCLK/PD lines |
| Self-Biasing PECL Inputs | Eliminates need for external VBB bias network, simplifying interface to OC-48 laser drivers and clock recovery ICs |
| Data Realignment via SYNC Input | Allows dynamic frame synchronization during system bring-up or hitless protection switching without software intervention |
| 16-Bit Parallel Output Register | Latches full byte + overhead bits on PCLK negative edge, matching SONET STS-1 framing alignment requirements |
| Extended Temperature Range (-40°C to +85°C) | Validated for deployment in uncontrolled environmental enclosures such as roadside optical nodes and base station cabinets |
Applications
| SDH/SONET Add/Drop Multiplexer | Digital Cross-Connect System |
|---|---|
Use Scenario: Extracting individual VC-4 or STS-1 channels from an OC-48 aggregate stream for local service insertion or grooming. IC Role / Device Role / Timing Role: Deserializes incoming 2.488Gbps line-rate data into 16-bit parallel format synchronized to recovered clock for channel demultiplexing logic. Use Value: Enables precise bit-level alignment control via SYNC input to maintain SONET pointer justification integrity during traffic reconfiguration. | Use Scenario: Interconnecting multiple OC-48 tributaries in central office switching fabric with sub-ms reconfiguration latency. IC Role / Device Role / Timing Role: Converts serialized transport stream to parallel data for crosspoint switch fabric interface, using PCLK as timing reference for memory buffer writes. Use Value: Delivers deterministic 2-cycle SYNC response time, supporting hitless switching under G.8032 Ethernet ring protection protocols. |
| Optical Line Terminal (OLT) | SONET Framer Interface |
Use Scenario: Aggregating GPON or XGS-PON upstream bursts into OC-48-compliant payload for metro transport. IC Role / Device Role / Timing Role: Receives burst-mode serial data from PON MAC layer and presents aligned 16-bit parallel words to framer ASIC. Use Value: Self-biasing PECL inputs tolerate variable amplitude and jitter from burst-mode transceivers without external bias tuning. | Use Scenario: Feeding parallel data from MAX3885ECB into a SONET framer (e.g., TI TSB12LV04) for section/line overhead processing and path mapping. IC Role / Device Role / Timing Role: Provides LVDS-aligned 155Mbps parallel bus with guaranteed setup/hold times relative to PCLK for framer input capture. Use Value: Meets tSU ≥100ps and tH ≥100ps over full temperature range, ensuring reliable framer latch timing margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar deserializer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3875ECB | Same architecture but rated for 1.244Gbps (STM-8/OC-24); lower power (450mW); identical pinout and LVDS interface | Targeted for mid-tier SDH/SONET systems where full OC-48 bandwidth is not required | Select MAX3875ECB when cost-sensitive designs operate below 2.488Gbps and benefit from reduced thermal load |
| TI SN65LVDS387 | LVDS-only deserializer (no PECL inputs); supports up to 1.5Gbps; 32-pin WQFN; no SYNC realignment feature | Used in non-telecom LVDS-to-parallel bridging, e.g., video or test equipment, not SDH/SONET line cards | Choose SN65LVDS387 only for LVDS-source systems lacking PECL clock/data and requiring compact packaging |
Compared with MAX3875ECB and SN65LVDS387, the MAX3885ECB uniquely supports full OC-48 line rate with integrated PECL front-end and real-time reframing-critical for carrier-grade SDH/SONET add/drop and cross-connect systems requiring deterministic bit alignment.
Availability
MAX3885ECB is available at Aetrix Electronics and suitable for SDH/SONET transmission systems, optical add/drop multiplexers, and digital cross-connect systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX3885ECB 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
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and RF ICs for communications, computing, and industrial markets.
The MAX3885ECB belongs to Maxim's high-speed communication interface product line, engineered specifically for SDH/SONET physical-layer signal conditioning and serialization/deserialization in carrier-class optical transport equipment.
FAQ
What is the maximum serial clock frequency supported by the MAX3885ECB?
The MAX3885ECB supports a maximum serial clock frequency of 2.488GHz, corresponding to the STM-16/OC-48 line rate. This value is guaranteed over the full operating temperature range (-40°C to +85°C) and supply voltage range (+3.0V to +3.6V), as specified in the AC Electrical Characteristics table of the MAX3885ECB datasheet.
Does the MAX3885ECB require external termination resistors on its LVDS outputs?
Yes, the MAX3885ECB LVDS outputs (PCLK± and PD0± to PD15±) require external 100Ω differential termination between complementary pins. The device does not include internal termination for these outputs, and omitting this termination will cause signal integrity degradation and timing violations in the receiving logic.
How does the SYNC input function in the MAX3885ECB?
The SYNC+ and SYNC- inputs of the MAX3885ECB accept an LVDS pulse lasting at least four SCLK periods to trigger data realignment. Upon detection, the MAX3885ECB drops the first bit of the next PCLK cycle, shifting parallel output alignment by one bit within two complete PCLK cycles-enabling hitless frame resynchronization in SDH/SONET systems.
Is the MAX3885ECB pin-compatible with the MAX3875ECB?
Yes, the MAX3885ECB is pin-compatible with the MAX3875ECB: both use identical 64-pin TQFP packaging, share identical pin functions and assignments, and support the same PCB footprint and layout. This allows direct substitution in existing designs where bandwidth requirements increase from OC-24 to OC-48.
What is the typical supply current consumption of the MAX3885ECB at +25°C?
The MAX3885ECB draws 200mA to 280mA supply current (ICC) over the operating temperature range, with a typical value of 200mA at +25°C and VCC = +3.3V. This corresponds to approximately 660mW of operating power, as confirmed in the Features section and DC Electrical Characteristics table of the MAX3885ECB datasheet.
MAX3885ECB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Deserializer
- Data Rate:
- 2.488Gbps
- Input Type:
- PECL
- Output Type:
- LVDS
- Number of Inputs:
- 1
- Number of Outputs:
- 16
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-LQFP (10x10)
MAX3885ECB FAQ
1.How can I place an order for MAX3885ECB through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX3885ECB 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 MAX3885ECB reliable?
The price and inventory of MAX3885ECB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3885ECB is usually 5 days.
3.What payment methods are accepted for MAX3885ECB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3885ECB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX3885ECB?
MAX3885ECB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX3885ECB 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 MAX3885ECB?
For technical support, including MAX3885ECB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3885ECB requirements.
6.How does Aetrix verify that MAX3885ECB is sourced from the original manufacturer or authorized distributors?
All MAX3885ECB 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 MAX3885ECB meets industry standards.
7.What is the process for return or replacement of MAX3885ECB?
All MAX3885ECB units undergo pre-shipment inspection (PSI). If there is an issue with MAX3885ECB, 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 MAX3885ECB part is unused and in its original packaging.
Return procedure for MAX3885ECB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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