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Texas Instruments DS32ELX0421SQE/NOPB
- Part No.:
- DS32ELX0421SQE/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Serializers, Deserializers
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
DS32ELX0421SQE/NOPB.pdf
- Description:
- IC SERIALIZR DDR LVDS PAR 48WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,888
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Product details
Overview
DS32ELX0421SQE/NOPB from Texas Instruments is a 125–312.5 MHz DDR LVDS-to-CML FPGA-link serializer supporting up to 3.125 Gbps serial data rate, 5-bit parallel LVDS input, and redundant CML output (TxOUT1±). It operates across –40°C to +85°C and integrates on-chip LC VCOs, programmable de-emphasis, and remote sense for automatic link negotiation with DS32ELX0124 deserializers in high-speed backplane video transport systems.
For engineers reviewing the DS32ELX0421SQE/NOPB datasheet, DS32ELX0421SQE/NOPB pinout, DS32ELX0421SQE/NOPB application, or DS32ELX0421SQE/NOPB equivalent, this page delivers verified technical context, exact pin functions, real-world timing roles, and validated alternative options - all grounded in TI's SNLS282F datasheet and package documentation.
Technical Context
The DS32ELX0421SQE/NOPB uses an internal PLL with external loop filter (LF_REF/LF_CP pins) to generate serialization clock from DDR LVDS input clock (TxCLKIN±), achieving low intrinsic jitter (35 ps peak-to-peak at 3.125 Gbps). Its dual CML outputs (TxOUT0± and TxOUT1±) support redundancy, with TxOUT1_EN pin enabling/disabling the secondary channel.
It implements configurable DC-balanced encoding (8b/10b) and data scrambling to ensure transition density ≥20% over 200 µs, required by companion CDR-based deserializers. Remote Sense (RS pin) enables autonomous link state negotiation (IDLE → LINK DETECT → LINK ACQUISITION → NORMAL) without external feedback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Serial Data Rate | 1.25–3.125 Gbps - supports 1080p60+ video payloads with minimal overhead in FR-4 backplanes. |
| Parallel Clock Range | 125–312.5 MHz DDR - matches FPGA I/O timing budgets for synchronous LVDS capture of 5-bit nibbles. |
| Output Jitter (Peak-to-Peak) | 35 ps at 3.125 Gbps - meets stringent eye-opening requirements for ≤30-inch FR-4 trace lengths. |
| ESD Protection (HBM) | >8 kV - ensures robustness during board handling and system integration in industrial environments. |
| Operating Temperature | –40°C to +85°C - qualified for commercial/industrial imaging and display applications without derating. |
| Supply Voltages | VDD33 = 3.135–3.465 V; VDD25 = 2.375–2.625 V - requires separate low-noise LDOs with 100 mVP-P noise limit. |
| Power Consumption | 620–710 mW at 3.125 Gbps with both outputs enabled - dictates thermal pad (DAP) grounding via 9 vias per datasheet. |
Pinout & Package
DS32ELX0421SQE/NOPB uses a 48-pin WQFN package (RHS0048A) with exposed thermal pad (Pin 49 = GND). The package supports reflow soldering at 260°C (4 sec) and requires strict 9-via grounding of the DAP for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TxOUT0+/TxOUT0− | CML serial output pair | Main high-speed differential output; internally terminated to 50 Ω or 75 Ω; drives FR-4 or coaxial cable. |
| TxOUT1+/TxOUT1− | CML redundant output pair | DS32ELX0421-specific backup channel; enabled only when TXOUT1_EN = high; identical timing/jitter specs. |
| TxCLKIN+/TxCLKIN− | LVDS DDR parallel clock input | Accepts 125–312.5 MHz DDR clock; defines sampling edges for TxIN[4:0]±; setup/hold adjustable via SMBus register 30'h. |
| TxIN[4:0]+/TxIN[4:0]− | LVDS parallel data inputs | 5 differential pairs carrying 5-bit DDR data; TxIN4± serves as DATA_VALID control for DC-balance encoder. |
| RS / DC_B | LVCMOS configuration inputs | RS = 1 + DC_B = 0 enables Remote Sense; RS = 1 + DC_B = 1 enables DC-balance encoding (8b/10b). |
| VOD_CTRL | Analog amplitude control | Resistor-to-ground sets CML output swing (1175–1450 mVP-P); default 9.1 kΩ yields ~1350 mVP-P. |
| LF_CP / LF_REF | PLL loop filter interface | External RC network (1.5 kΩ + 100 nF) sets PLL bandwidth; critical for jitter transfer function peaking <0.5 dB. |
| SMB_CS / SCK / SDA | SMBus management interface | 2-wire bus (10–100 kHz) for configuring de-emphasis, scrambler, encoder, test patterns, and error reporting. |
Key Features
| Feature | Design Value |
|---|---|
| Redundant Serial Output | DS32ELX0421-exclusive TxOUT1± pair enables failover-capable links in mission-critical video transport systems. |
| Remote Sense Auto-Negotiation | Eliminates need for dedicated feedback path; autonomously detects DS32ELX0124 presence and establishes lock state. |
| Programmable Transmit De-emphasis | Four levels (Off/Low/Medium/Max) via DE_EMPH[1:0] pins - compensates for FR-4 loss up to 30 inches at 3.125 Gbps. |
| Configurable Output Termination | 50 Ω or 75 Ω internal CML termination selectable via SMBus - matches common backplane/cable impedances without external resistors. |
| Built-in Test Pattern Generator | Enables BER validation and channel margining without external pattern source; accessible via SMBus register control. |
Applications
| Industrial Imaging Systems | LED Video Walls |
|---|---|
Use Scenario: High-resolution X-ray and endoscopic camera modules transmitting uncompressed 12-bit image data over 20-inch FR-4 backplanes. IC Role / Device Role / Timing Role: Serializer converts FPGA-generated 5-bit DDR LVDS pixel streams into single-lane 3.125 Gbps CML for low-EMI transmission. Use Value: Redundant TxOUT1± allows hot-swap replacement of failed receiver boards without interrupting live imaging sessions. |
Use Scenario: Modular LED wall controllers distributing synchronized RGBW frame data to tile-level receivers across 10+ cabinets. IC Role / Device Role / Timing Role: DS32ELX0421SQE/NOPB provides deterministic latency (10–14 TBIT) and data-valid signaling for multi-receiver synchronization. Use Value: Remote Sense ensures plug-and-play link establishment when new tiles are added mid-deployment without firmware reconfiguration. |
| Medical Display Interfaces | Test & Measurement Equipment |
Use Scenario: DICOM-grade diagnostic monitors receiving real-time 4K@60Hz video from PACS servers via fiber-optic extenders. IC Role / Device Role / Timing Role: Converts LVDS from graphics FPGA to CML for driving optical transmitters; DC-balance encoding enables AC-coupled fiber interfaces. Use Value: 35 ps intrinsic jitter preserves eye opening at 3.125 Gbps, ensuring bit error rate <10−15 over 100m multimode fiber. |
Use Scenario: High-speed oscilloscope front-end modules capturing 1 GS/s analog samples and streaming digitized waveforms to host FPGA. IC Role / Device Role / Timing Role: Serializer aggregates parallel ADC outputs into single CML lane; built-in test pattern generator validates signal integrity pre-deployment. Use Value: Programmable de-emphasis and VOD_CTRL resistor tuning enable precise channel equalization across varying PCB stackups and trace lengths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FPGA-link serializer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS32EL0421SQE/NOPB | No redundant output; single TxOUT0± only; identical pinout except TxOUT1± and TXOUT1_EN omitted. | Suitable for cost-sensitive, non-redundant links where TxOUT1± functionality is unnecessary. | Select DS32EL0421SQE/NOPB only if system-level fault tolerance is not required and BOM cost reduction is prioritized. |
| MAX9278GTJ+T | GMSL2-compliant serializer; 3.12 Gbps max; integrated spread-spectrum clocking; automotive AEC-Q100 Grade 2 rated. | Targeted at automotive ADAS cameras; requires GMSL2 deserializer (e.g., MAX9271); no Remote Sense or DC-balance encoder. | Choose MAX9278GTJ+T only for automotive environments requiring ESD >15 kV and temperature range –40°C to +105°C. |
Compared with DS32EL0421SQE/NOPB and MAX9278GTJ+T, DS32ELX0421SQE/NOPB uniquely combines redundancy, Remote Sense auto-negotiation, and 8b/10b encoding - making it irreplaceable for industrial video backplanes requiring zero-downtime link recovery and AC-coupled media.
Availability
DS32ELX0421SQE/NOPB is available at Aetrix Electronics and suitable for industrial imaging systems, LED video walls, medical display interfaces, and test & measurement equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DS32ELX0421SQE/NOPB 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity solutions, with over 50 years of innovation in high-speed interface ICs and signal conditioning technology.
The DS32ELX0421SQE/NOPB belongs to TI's FPGA-Link serializer family, designed specifically for high-fidelity, low-latency video and imaging data transport over FR-4, balanced cables, and optical fiber in industrial and commercial systems.
FAQ
What is the primary function of the DS32ELX0421SQE/NOPB in a video transport system?
The DS32ELX0421SQE/NOPB acts as a high-speed parallel-to-serial converter, accepting 5-bit DDR LVDS data (up to 312.5 MHz) from an FPGA and serializing it into a single 1.25–3.125 Gbps CML stream. In video transport systems, it enables compact, low-EMI transmission of uncompressed HD/4K video over FR-4 backplanes or coaxial cables while maintaining sub-35 ps jitter for reliable eye opening.
How does the Remote Sense feature work on the DS32ELX0421SQE/NOPB?
Remote Sense (enabled via RS = 1 and DC_B = 0) allows the DS32ELX0421SQE/NOPB to autonomously detect and negotiate link status with a compatible DS32ELX0124 deserializer without external feedback. It cycles through IDLE → LINK DETECT → LINK ACQUISITION → NORMAL states, using back-channel signaling over the same high-speed serial line to confirm presence, train, and lock - eliminating need for dedicated control lines.
Can the DS32ELX0421SQE/NOPB operate without an external loop filter?
No. The DS32ELX0421SQE/NOPB requires an external loop filter connected between LF_REF (Pin 26) and LF_CP (Pin 27) - typically a 1.5 kΩ resistor in series with a 100 nF capacitor - to stabilize its internal PLL. Omitting this network causes unstable lock, excessive jitter (>100 ps), and failure to meet the specified 35 ps peak-to-peak jitter at 3.125 Gbps.
What is the role of the TXOUT1_EN pin on the DS32ELX0421SQE/NOPB?
The TXOUT1_EN pin (Pin 12) enables or disables the redundant CML output pair (TxOUT1±) on the DS32ELX0421SQE/NOPB. When driven high, TxOUT1± becomes active and mirrors TxOUT0± with identical timing and jitter characteristics; when low, TxOUT1± is disabled and presents high impedance. This pin must be tied high to use redundancy - it is not SMBus-controllable.
Does the DS32ELX0421SQE/NOPB support AC-coupled CML outputs?
Yes. The DS32ELX0421SQE/NOPB supports AC-coupled signaling on both TxOUT0± and TxOUT1± outputs. Its integrated 50 Ω or 75 Ω on-die CML terminations are referenced to VDD25, allowing direct coupling through 100 nF capacitors to AC-coupled receivers - a key requirement for optical transmitters and isolation-critical medical displays.
DS32ELX0421SQE/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Serializer
- Data Rate:
- 3.125Gbps
- Input Type:
- LVDS
- Output Type:
- CML
- Number of Inputs:
- 5
- Number of Outputs:
- 2
- Voltage - Supply:
- 2.5V, 3.3V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-WQFN (7x7)
DS32ELX0421SQE/NOPB FAQ
1.How can I place an order for DS32ELX0421SQE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for DS32ELX0421SQE/NOPB 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 DS32ELX0421SQE/NOPB reliable?
The price and inventory of DS32ELX0421SQE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS32ELX0421SQE/NOPB is usually 5 days.
3.What payment methods are accepted for DS32ELX0421SQE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS32ELX0421SQE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS32ELX0421SQE/NOPB?
DS32ELX0421SQE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS32ELX0421SQE/NOPB 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 DS32ELX0421SQE/NOPB?
For technical support, including DS32ELX0421SQE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS32ELX0421SQE/NOPB requirements.
6.How does Aetrix verify that DS32ELX0421SQE/NOPB is sourced from the original manufacturer or authorized distributors?
All DS32ELX0421SQE/NOPB 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 DS32ELX0421SQE/NOPB meets industry standards.
7.What is the process for return or replacement of DS32ELX0421SQE/NOPB?
All DS32ELX0421SQE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with DS32ELX0421SQE/NOPB, 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 DS32ELX0421SQE/NOPB part is unused and in its original packaging.
Return procedure for DS32ELX0421SQE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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