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Analog Devices Inc./Maxim Integrated DS4312P+
- Part No.:
- DS4312P+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Programmable Timers and Oscillators
- Package:
- 10-LCCC Exposed Pad
- Datasheet:
-
DS4312P+.pdf
- Description:
- IC OSC CLOCK 312.5MHZ 10LCCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,193
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Product details
Overview
DS4312P+ from Maxim Integrated is a 312.5MHz LVPECL-output ceramic surface-mount crystal oscillator with ±50ppm frequency stability, 3.3V operation, and <0.7psRMS phase jitter (12kHz–20MHz), designed for high-speed serial timing in SONET/SDH and 10GbE systems.
For engineers reviewing the DS4312P+ datasheet, DS4312P+ pinout, DS4312P+ application, or DS4312P+ equivalent, this page delivers verified package dimensions, LVPECL output drive specifications, startup time, thermal resistance, and RoHS-compliant LCCC pin mapping - all confirmed from Maxim's official DS4125–DS4776 datasheet Rev 2 (June 2008).
Technical Context
The DS4312P+ integrates an AT-cut fundamental-mode crystal with a BiPOLAR SiGe synthesizer IC to generate 312.5MHz output via PLL-based frequency synthesis. It supports active-high OE control with 200ns enable/disable propagation delay and operates across –40°C to +85°C.
Its LVPECL output stage drives 50Ω terminations at VCC – 2.0V bias, delivering 0.595–0.710V differential voltage, 45–55% duty cycle, and 200ps rise/fall times. Phase noise is –113dBc/Hz at 100kHz offset and –153dBc/Hz at 20MHz offset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 312.5MHz nominal - matches SONET OC-48/SDH STM-16 and 10GbE reference clock requirements. |
| Frequency Stability | ±50ppm total - covers temperature, aging, supply, and load variation over full industrial range. |
| Jitter (RMS) | <0.7ps (12kHz–20MHz) - ensures low BER in high-speed serial links like InfiniBand and GPON. |
| Supply Voltage | 3.3V ±5% - compatible with standard logic rails; ICC = 74–100mA depending on load condition. |
| Operating Temp | –40°C to +85°C - qualified for telecom infrastructure and industrial embedded timing applications. |
| Package | 5.0mm × 3.2mm × 1.49mm, 10-pin LCCC - compact ceramic SMT footprint with exposed paddle (non-connected). |
| Output Type | LVPECL - differential signaling with PECL_BIAS = VCC – 2.0V; requires external 50Ω termination to bias point. |
Pinout & Package
DS4312P+ uses a 10-pin LCCC ceramic package (5.0mm × 3.2mm × 1.49mm) with non-connected exposed paddle (EP). Pin 1 is OE (active-high enable); pins 4 and 5 are complementary LVPECL outputs (OUTP/OUTN); pin 6 is VCC; pin 3 is GND; pins 2 and 7–10 are no-connect (must be floated).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE | Active-high output enable with internal 100kΩ pullup - drives outputs to PECL_BIAS level when low. |
| 2, 7–10 | N.C. | No connection - must remain unconnected and unbonded per Maxim design guidance. |
| 3 | GND | Ground reference for power and signal integrity - connects directly to substrate ground plane. |
| 4 | OUTP | Positive LVPECL output - requires 50Ω termination to PECL_BIAS (VCC – 2.0V) for valid logic levels. |
| 5 | OUTN | Negative LVPECL output - complements OUTP; differential pair defines timing edge precision. |
| 6 | VCC | 3.3V supply input - bypass with 0.01μF and 0.1μF capacitors close to pin per typical operating circuit. |
| EP | Exposed Paddle | Thermal pad not electrically connected - must not be soldered or placed over metal layers. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low phase jitter | <0.7psRMS (12kHz–20MHz) - minimizes timing uncertainty in 10GbE and SONET clock recovery. |
| LVPECL output interface | Valid logic swing with 50Ω termination to VCC – 2.0V - enables direct interfacing with TI, IDT, and Broadcom SerDes inputs. |
| Industrial temperature range | –40°C to +85°C operation - supports deployment in carrier-grade optical line cards and base station timing modules. |
| RoHS-compliant packaging | Lead-free JESD97 e4 finish (Au over Ni) - compatible with leaded and lead-free reflow profiles per IPC/JEDEC J-STD-020. |
| Fundamental-mode crystal + PLL | AT-cut quartz resonator with integrated SiGe synthesizer - eliminates external loop filter components and reduces BOM count. |
Applications
| InfiniBand Timing Module | GPON Optical Line Terminal (OLT) |
|---|---|
Use Scenario: Provides reference clock for InfiniBand switch fabric PHY layer with sub-1ps jitter tolerance. IC Role / Device Role / Timing Role: Primary system clock source for 10Gbps serial lanes with deterministic phase alignment. Use Value: 312.5MHz output and <0.7psRMS jitter meet InfiniBand DDR specification for interconnect latency and BER performance. | Use Scenario: Synchronizes upstream burst transmission in GPON OLTs requiring precise 312.5MHz frame timing. IC Role / Device Role / Timing Role: Master timing reference for TDMA slot allocation and burst-mode receiver calibration. Use Value: ±50ppm stability over temperature ensures consistent upstream frame alignment across –40°C to +85°C cabinet environments. |
| 10GbE LAN/WAN PHY | SONET OC-48/SDH STM-16 Equipment |
Use Scenario: Supplies clock to 10GBASE-R PCS/PMA layer in enterprise routers and data center switches. IC Role / Device Role / Timing Role: Low-jitter reference oscillator for 64b/66b encoding and SERDES CDR lock acquisition. Use Value: LVPECL output drive strength and 200ps edge rates support clean signal integrity on FR4 backplanes up to 24″. | Use Scenario: Generates line-rate clock for SONET OC-48 add/drop multiplexers and SDH STM-16 regenerators. IC Role / Device Role / Timing Role: Stratum-3-equivalent timing source with holdover capability during network synchronization loss. Use Value: –113dBc/Hz phase noise at 100kHz offset suppresses adjacent-channel interference in dense wavelength division multiplexing (DWDM) systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar crystal oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT XLP726A312M5000 | 312.5MHz LVPECL XO, ±25ppm stability, 0.5psRMS jitter (12kHz–20MHz), 3.3V, 5.0×3.2mm 6-pin SMD | Higher stability and lower jitter, but 6-pin package lacks OE control and N.C. flexibility of DS4312P+ | Select when tighter frequency accuracy and lowest possible jitter are prioritized over enable functionality. |
| SiTime SiT8208AI-23-33E-312.500000Y | 312.5MHz LVPECL MEMS oscillator, ±50ppm stability, 0.8psRMS jitter, 3.3V, 5.0×3.2mm 6-pin SMD | MEMS-based architecture offers superior shock/vibration immunity but slightly higher jitter than DS4312P+ | Select for harsh-environment deployments where mechanical robustness outweighs marginal jitter trade-off. |
Compared with IDT XLP726A312M5000 and SiTime SiT8208AI-23-33E-312.500000Y, DS4312P+ provides unique OE control and 10-pin LCCC layout for legacy board compatibility, while maintaining industry-standard jitter and stability for telecom timing - making it optimal for drop-in upgrades in existing DS4-XO designs.
Availability
DS4312P+ is available at Aetrix Electronics and suitable for SONET/SDH line cards, 10GbE switches, GPON OLTs, and InfiniBand fabric modules requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant timing solutions.
Supply support for DS4312P+ 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 analog, mixed-signal, and timing solutions for industrial, communications, and computing markets.
The DS4-XO series - including DS4312P+ - was engineered specifically for high-reliability telecom and datacom timing applications demanding ultra-low jitter, wide temperature operation, and LVDS/LVPECL interoperability.
FAQ
What output type does DS4312P+ use, and how is it terminated?
DS4312P+ uses LVPECL output, requiring 50Ω termination from each output (OUTP and OUTN) to the PECL_BIAS voltage level at VCC – 2.0V. This configuration ensures valid differential logic levels and maintains signal integrity for high-speed interfaces. The DS4312P+ datasheet specifies 0.595–0.710V differential swing under these conditions, and the device's internal design assumes this bias point for proper operation.
What is the frequency stability specification for DS4312P+, and what factors does it include?
The DS4312P+ has a total frequency stability of ±50ppm, covering combined effects of temperature variation (±35ppm), initial tolerance (±20ppm), supply voltage change (±3ppm/V), load variation (±1ppm), and 15-year aging (±7ppm). This value is explicitly defined in the DS4125–DS4776 datasheet's Electrical Characteristics table and applies across the full –40°C to +85°C operating range with 3.3V ±5% supply.
Does DS4312P+ have an output enable function, and how does it behave?
Yes, DS4312P+ features an active-high Output Enable (OE) pin with internal 100kΩ pullup. When OE is low, LVPECL outputs go to the PECL_BIAS level (VCC – 2.0V); when high, outputs become active with specified differential swing. Propagation delays are tPZA = 200ns (enable) and tPAZ = 200ns (disable), both guaranteed by design per the DS4312P+ datasheet.
What is the package type and thermal resistance of DS4312P+?
DS4312P+ uses a 10-pin LCCC ceramic package measuring 5.0mm × 3.2mm × 1.49mm with a non-connected exposed paddle (EP). Its junction-to-ambient thermal resistance (θJA) is 90°C/W, as documented in the "Chip Information" section of the DS4125–DS4776 datasheet. This value guides thermal design for continuous operation within rated ambient limits.
Is DS4312P+ RoHS-compliant, and what is its lead finish?
Yes, DS4312P+ is RoHS-compliant with a lead-free JESD97 category e4 finish (gold over nickel). This finish is compatible with both lead-based and lead-free soldering processes, and the + suffix in DS4312P+ explicitly denotes compliance per Maxim's ordering nomenclature and datasheet revision history.
DS4312P+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- DS4-XO
- Package/Case:
- 10-LCCC Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- Clock Oscillator
- Count:
- -
- Frequency:
- 312.5MHz
- Voltage - Supply:
- 3.135V ~ 3.465V
- Current - Supply:
- 49 mA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-LCCC (5x3.2)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
DS4312P+ FAQ
1.How can I place an order for DS4312P+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS4312P+ 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 DS4312P+ reliable?
The price and inventory of DS4312P+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS4312P+ is usually 5 days.
3.What payment methods are accepted for DS4312P+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS4312P+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS4312P+?
DS4312P+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS4312P+ 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 DS4312P+?
For technical support, including DS4312P+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS4312P+ requirements.
6.How does Aetrix verify that DS4312P+ is sourced from the original manufacturer or authorized distributors?
All DS4312P+ 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 DS4312P+ meets industry standards.
7.What is the process for return or replacement of DS4312P+?
All DS4312P+ units undergo pre-shipment inspection (PSI). If there is an issue with DS4312P+, 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 DS4312P+ part is unused and in its original packaging.
Return procedure for DS4312P+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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