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Analog Devices Inc./Maxim Integrated MAX3693ECJ+
- Part No.:
- MAX3693ECJ+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Serializers, Deserializers
- Package:
- -
- Datasheet:
-
MAX3693ECJ+.pdf
- Description:
- IC SERIALIZER LVDS 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,494
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Product details
Overview
MAX3693ECJ+ from Maxim Integrated is a +3.3V, 622Mbps SDH/SONET 4:1 serializer with integrated PLL clock synthesis, converting 4-bit-wide 155Mbps parallel data to 622Mbps serial output. It accepts LVDS parallel clock/data inputs and delivers differential 3.3V PECL serial-data output, operating across -40°C to +85°C in telecom transmission systems.
For engineers reviewing the MAX3693ECJ+ datasheet, MAX3693ECJ+ pinout, MAX3693ECJ+ application, or MAX3693ECJ+ equivalent, key selection considerations include its 4:1 serialization ratio, support for four reference clock frequencies (38.88/51.84/77.76/155.52MHz), LVDS input termination architecture, PECL output termination requirements, and TQFP-32 package thermal performance.
Technical Context
The MAX3693ECJ+ integrates a phase/frequency detector, loop filter/amplifier, voltage-controlled oscillator, and prescaler to synthesize a precise 622.08MHz internal serial clock from one of four LVDS reference inputs. Its 4-bit parallel input register latches data on the rising edge of PCLKI, while the PCLKO outputs (622MHz ÷ 4 = 155.52MHz) provide timing for overhead management circuits.
LVDS inputs (PCLKI±, RCLK±, PD0–PD3±) feature 100Ω differential internal termination and ±100mV input threshold range; PECL outputs (SD±) require external 50Ω DC termination to (VCC − 2V) and deliver 250–400mV differential output voltage with 11psRMS random jitter at +25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | +3.3V nominal (range +3.0V to +3.6V); enables single-rail operation with standard telecom logic supplies. |
| Serial Data Rate | 622.08Mbps; matches OC-12/STM-4 SONET/SDH line rate for direct interface to fiber transceivers. |
| Parallel Interface | 4-bit LVDS at 155.52Mbps; supports byte-aligned ATM cell or SDH frame payload mapping. |
| Reference Clock Inputs | 155.52MHz / 77.76MHz / 51.84MHz / 38.88MHz LVDS; selectable via CKSET pin for multi-rate system flexibility. |
| Output Jitter | 11psRMS random jitter; meets GR-253-CORE jitter compliance for SONET OC-12 long-haul applications. |
| Power Dissipation | 215mW typical at +25°C; enables thermal design within 663mW TQFP-32 derated limit up to +85°C. |
| Differential Output Voltage | 250mV to 400mV (|VOD|); ensures robust noise margin over 50Ω PECL transmission lines. |
Pinout & Package
MAX3693ECJ+ is housed in a 32-pin Thin Quad Flat Package (TQFP) with exposed thermal pad, rated for -40°C to +85°C industrial operation. Pin pitch is 0.8mm; body size is 7mm × 7mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PD0+ to PD3+ | Noninverting LVDS parallel data inputs | Accept 4-bit wide parallel data; latched on rising edge of PCLKI; internally terminated (100Ω diff). |
| PCLKI+, PCLKI- | LVDS parallel clock input | Edge-triggered clock for parallel data capture; defines setup/hold window relative to PCLKO. |
| RCLK+, RCLK- | LVDS reference clock input | Drives PLL synthesizer; selects 622Mbps output rate via CKSET programming. |
| SD+, SD- | Differential 3.3V PECL serial output | Delivers serialized 622Mbps data; requires external 50Ω termination to (VCC − 2V). |
| PCLKO+, PCLKO- | LVDS parallel clock output | 155.52MHz output (622.08MHz ÷ 4); clocks overhead management circuitry. |
| CKSET | Reference clock rate select | Four-state programming: VCC=155.52MHz, open=77.76MHz, 20kΩ-to-GND=51.84MHz, GND=38.88MHz. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PLL clock synthesis | Eliminates external clock multiplier IC; reduces BOM count and board area in SDH/SONET line cards. |
| LVDS input termination | 100Ω internal differential termination removes need for external resistors on PCLKI/RCLK/PD inputs. |
| PECL output drive strength | Supports 50Ω controlled-impedance traces to fiber drivers without level-shifting buffers. |
| Multi-rate reference clock support | Enables reuse across OC-3/OC-12/OC-48 test platforms via simple CKSET configuration. |
| Low-jitter serial output | 11psRMS random jitter ensures compliance with SONET OC-12 jitter transfer and generation masks. |
Applications
| 622Mbps SDH/SONET Transmission Systems | 622Mbps ATM/SONET Access Nodes |
|---|---|
Use Scenario: Aggregating four 155Mbps ATM cells into a single OC-12 optical line interface. IC Role / Device Role / Timing Role: 4:1 serializer generating 622Mbps PECL output synchronized to network timing via LVDS RCLK input. Use Value: Enables deterministic cell interleaving with sub-nanosecond PCLKO–PCLKI skew control for SONET pointer processing. |
Use Scenario: Front-end data framing in DSLAM or MSAN access equipment supporting STM-4 backhaul. IC Role / Device Role / Timing Role: Parallel-to-serial conversion of SDH section overhead and payload using PCLKO-synchronized latch timing. Use Value: Reduces FPGA I/O resource usage by offloading 4-bit parallel bus handling and clock domain crossing. |
| Add/Drop Multiplexers | Digital Cross Connects |
Use Scenario: Inserting/extracting tributary signals in OC-12 ADM shelf controllers. IC Role / Device Role / Timing Role: Serializer for add-path data with CKSET-configured reference clock matching upstream line rate. Use Value: Supports hitless reconfiguration between 155/622Mbps rates without hardware change or firmware update. |
Use Scenario: Interfacing switching fabric to OC-12 optical interfaces in DCS central offices. IC Role / Device Role / Timing Role: Timing-critical serialization of cross-connected VC-4 containers with low-jitter PECL output. Use Value: Meets GR-1089 immunity requirements via LVDS input noise rejection and PECL output slew control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serializer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3695ECJ+ | Same 32-pin TQFP package and 622Mbps rate, but supports only 155.52MHz RCLK; no CKSET multi-rate option. | Limited to fixed OC-12 systems; lacks flexibility for lab test benches requiring multiple reference rates. | Select when cost-sensitive designs use only 155.52MHz clock and do not require field-programmable rate selection. |
| ICS8430AYLFT | LVDS-to-PECL serializer with 622Mbps capability but no integrated PLL; requires external 622MHz clock source. | Increases system complexity with separate clock generator; higher jitter accumulation risk in cascaded PLL chains. | Select when existing 622MHz clock infrastructure exists and board space permits additional clock IC. |
Compared with MAX3693ECJ+, MAX3695ECJ+ simplifies design for single-rate deployments but sacrifices multi-rate adaptability, while ICS8430AYLFT shifts clock synthesis burden to system-level components-making MAX3693ECJ+ optimal for compact, self-contained SONET line interface modules.
Availability
MAX3693ECJ+ is available at Aetrix Electronics and suitable for 622Mbps SDH/SONET transmission systems, ATM/SONET access nodes, and digital cross-connect equipment requiring stable component supply across extended temperature ranges.
Supply support for MAX3693ECJ+ 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) designs precision analog, mixed-signal, and high-speed timing ICs for telecom, industrial, and computing applications.
The MAX3693ECJ+ belongs to Maxim's high-speed serializer product line, engineered specifically for SDH/SONET OC-12 and ATM physical layer interfacing with integrated clock synthesis and LVDS/PECL signal conditioning.
FAQ
What is the primary function of the MAX3693ECJ+ in telecom systems?
The MAX3693ECJ+ functions as a 4:1 parallel-to-serial converter that transforms four 155.52Mbps LVDS data lanes into a single 622.08Mbps PECL serial stream. It integrates a PLL to synthesize the 622Mbps clock from lower-frequency LVDS references, enabling direct interface to OC-12 optical transceivers without external clock multipliers. This makes MAX3693ECJ+ essential for SDH/SONET line interface units and ATM segmentation/reassembly stages.
How does the CKSET pin configure reference clock frequency on the MAX3693ECJ+?
The CKSET pin on the MAX3693ECJ+ selects among four reference clock frequencies: 155.52MHz (CKSET = VCC), 77.76MHz (CKSET = open), 51.84MHz (CKSET = 20kΩ to GND), or 38.88MHz (CKSET = GND). This resistor-programmable configuration allows one MAX3693ECJ+ design to support multiple SONET/SDH rates-OC-3, OC-12, OC-12 with overhead, and OC-48 test modes-without changing the PCB layout or firmware.
What are the termination requirements for the PECL outputs (SD+, SD-) of the MAX3693ECJ+?
The MAX3693ECJ+ PECL outputs SD+ and SD- require 50Ω DC termination to (VCC − 2V), typically implemented with two 130Ω resistors from SD+ and SD- to +3.3V and two 82Ω resistors from each output to ground. Alternatively, Thevenin-equivalent termination may be used if (VCC − 2V) is unavailable. AC coupling capacitors must be placed after the DC termination network to preserve common-mode bias integrity in the MAX3693ECJ+ output stage.
Does the MAX3693ECJ+ require external termination resistors on its LVDS inputs?
No, the MAX3693ECJ+ includes internal 100Ω differential termination on all LVDS inputs: PCLKI±, RCLK±, and PD0± through PD3±. This eliminates the need for external termination resistors, reducing component count and layout complexity. However, the PCLKO± outputs require external 100Ω differential termination between pins to ensure proper signal integrity for overhead management clock distribution.
What is the maximum allowable PCLKO-to-PCLKI skew for reliable operation of the MAX3693ECJ+?
The MAX3693ECJ+ specifies a PCLKO-to-PCLKI skew range of 0ps to +4000ps (+4ns) for guaranteed setup/hold timing compliance. This window centers around the rising edge of PCLKO (155.52MHz), defining when the PCLKI rising edge must occur to correctly latch parallel data into the input register. Exceeding this skew range risks metastability or bit errors in the serialized output stream of the MAX3693ECJ+.
MAX3693ECJ+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- -
- Data Rate:
- -
- Input Type:
- -
- Output Type:
- -
- Number of Inputs:
- -
- Number of Outputs:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX3693ECJ+ FAQ
1.How can I place an order for MAX3693ECJ+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX3693ECJ+ 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 MAX3693ECJ+ reliable?
The price and inventory of MAX3693ECJ+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3693ECJ+ is usually 5 days.
3.What payment methods are accepted for MAX3693ECJ+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3693ECJ+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX3693ECJ+?
MAX3693ECJ+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX3693ECJ+ 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 MAX3693ECJ+?
For technical support, including MAX3693ECJ+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3693ECJ+ requirements.
6.How does Aetrix verify that MAX3693ECJ+ is sourced from the original manufacturer or authorized distributors?
All MAX3693ECJ+ 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 MAX3693ECJ+ meets industry standards.
7.What is the process for return or replacement of MAX3693ECJ+?
All MAX3693ECJ+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX3693ECJ+, 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 MAX3693ECJ+ part is unused and in its original packaging.
Return procedure for MAX3693ECJ+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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