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Texas Instruments DP83848KSQ/NOPB
- Part No.:
- DP83848KSQ/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
DP83848KSQ/NOPB.pdf
- Description:
- IC TRANSCEIVER 1/1 40WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,948
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Product details
Overview
DP83848KSQ/NOPB from Texas Instruments is an industrial-grade 10/100 Mbps Ethernet PHY transceiver in a 40-pin WQFN package, supporting both MII and RMII MAC interfaces, Auto-MDIX, IEEE 802.3-compliant 10BASE-T/100BASE-TX physical layer, and integrated TP-PMD with adaptive equalization. It operates across –40°C to +85°C and delivers error-free operation beyond 137 meters over Cat-5 cable - deployed in factory automation gateways and embedded industrial controllers.
For engineers reviewing the DP83848KSQ/NOPB datasheet, DP83848KSQ/NOPB pinout, DP83848KSQ/NOPB application, or DP83848KSQ/NOPB equivalent, key selection considerations include its dual-interface flexibility (MII/RMII), industrial temperature rating, integrated bias resistor support (RBIAS), LED configuration strapping (AN0/AN1), and absence of CLK_OUT (distinguishing it from DP83848H/M/T variants).
Technical Context
The DP83848KSQ/NOPB implements a full IEEE 802.3-compliant PHY layer with ENDEC, PCS, and TP-PMD sublayers - including ANSI X3.263–compliant line driver/receiver, baseline wander compensation, and adaptive equalization for robust long-cable performance. Its Auto-MDIX engine dynamically swaps TD±/RD± roles without external magnetics reconfiguration.
It supports two configurable MAC interface modes: MII (25 MHz RX_CLK, 2.5/25 MHz TX_CLK) and RMII (50 MHz X1 reference), selected via the MII_MODE strap (RX_DV pin). Internal register access uses MDIO/MDC (up to 25 MHz), and hardware configuration is latched at reset via dedicated strap pins including PHYAD[4:0], LED_CFG, and MDIX_EN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 10/100 Mbps full/half-duplex - supports legacy 10BASE-T and high-speed 100BASE-TX links with automatic speed negotiation. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including PLCs and remote I/O modules. |
| Interface Support | MII and RMII - selectable via RX_DV strap; eliminates need for separate PHY variants in scalable MAC designs. |
| Auto-MDIX | Enabled by default via MDIX_EN strap - removes requirement for crossover cables or manual port configuration. |
| ESD Protection | ±4 kV HBM - ensures robustness in field-deployed equipment with frequent cable hot-plug events. |
| Power Supply | 3.3-V single supply (IOVDD33, AVDD33) - simplifies power architecture vs. multi-rail PHYs; 264 mW max dissipation. |
| Cable Reach | ≥137 m on Cat-5 - exceeds IEEE 802.3 specification, enabling extended node deployment in building automation networks. |
Pinout & Package
DP83848KSQ/NOPB is housed in a 6.0 mm × 6.0 mm WQFN-40 package with wettable flanks, optimized for automated optical inspection (AOI) and thermal performance (RθJA = 31.7°C/W). Pin 1 is located at the bottom-left corner adjacent to the marking dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 26 | IOVDD33 | I/O 3.3-V supply - powers digital interface logic (MII/RMII, MDIO, straps); requires local 0.1 µF + 10 µF decoupling. |
| 18 | AVDD33 | Analog 3.3-V supply - powers PMD transmitter/receiver circuitry; must be separated from IOVDD33 with ferrite bead or LC filter. |
| 13, 17, 29, 40 | AGND/DGND/IOGND | Separate analog/digital/IO ground planes - mandatory star-point connection at PFBOUT to minimize noise coupling into sensitive receive path. |
| 21 | LED_SPEED/AN1 | Speed indicator output - driven high for 100 Mbps, low for 10 Mbps; configurable as strap input during reset (pull-down for 10BASE-T only). |
| 22 | LED_LINK/AN0 | Link/activity indicator output - supports Mode 1 (link-only) or Mode 2 (link + activity blink); internal pullup enables default link indication without external components. |
| 23 | RESET_N | Active-low hardware reset - minimum 1 µs pulse required; resets all registers and re-latches strap values (PHYAD, MII_MODE, LED_CFG). |
| 24, 25 | MDIO / MDC | IEEE 802.3u serial management bus - MDIO is bidirectional with 1.5 kΩ pullup; MDC clock up to 25 MHz enables fast register read/write during initialization. |
| 31–39 | RX_CLK, RX_DV, RX_ER, RXD[3:0], TX_CLK, TX_EN, TXD[3:0] | MII data/control signals - synchronous to TX_CLK/RX_CLK edges; RXD/TXD are CMOS I/O with 5 pF capacitance, compatible with standard FPGA/ASIC I/O cells. |
| 11, 12, 14, 15 | RD−, RD+, TD−, TD+ | Differential PMD I/O pair - internally biased to 3.3 V; supports 10/100BASE-T signaling and Auto-MDIX polarity swap without external magnetics modification. |
| 20 | RBIAS | Bias resistor connection - requires 4.87 kΩ ±1% resistor to GND; sets internal current references for transmit amplitude and receive sensitivity calibration. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-MDIX with dynamic polarity detection | Eliminates manual cable type selection and reduces field commissioning time in mixed-device networks. |
| Configurable LED interface (AN0/AN1) | Enables user-selectable link/speed status reporting without firmware intervention - critical for headless industrial devices. |
| Single-register PHY status access | Reduces MAC-side polling overhead: basic link/speed/duplex state readable via one MII register (PHYCR, address 0x00). |
| Energy Detection Mode | Allows low-power wake-on-link functionality - PHY enters sleep state when no valid signal detected on RD±, resuming on carrier presence. |
| Integrated TP-PMD with baseline wander compensation | Ensures DC-coupled long-haul reliability on unshielded twisted-pair without external equalization circuitry. |
| 10/100 Mbps Packet BIST | On-chip self-test verifies PMD integrity and MAC interface timing paths - accelerates production test coverage and board-level validation. |
Applications
| Industrial Ethernet Gateway | Factory Automation Controller |
|---|---|
Use Scenario: Standalone protocol converter bridging Modbus TCP to EtherNet/IP in edge PLC cabinets. IC Role / Device Role / Timing Role: Physical layer interface between ARM-based application processor and RJ-45 magnetics; provides IEEE 802.3-compliant serialization/deserialization and clock recovery. Use Value: Industrial temperature rating (–40°C to +85°C) and 137 m reach enable deployment in unconditioned control panels; Auto-MDIX prevents miswiring during field maintenance. |
Use Scenario: Real-time I/O module with dual Ethernet ports for ring topology in automotive paint shop conveyors. IC Role / Device Role / Timing Role: Deterministic PHY layer with <24-bit receive latency and <6-bit transmit latency - meets cycle-time requirements for distributed motion control. Use Value: RMII mode reduces pin count vs. MII, freeing FPGA I/O for additional sensor interfaces; ESD tolerance (>4 kV HBM) withstands EMI-rich factory floor environments. |
| Building Management System Node | Wireless Base Station Backhaul |
Use Scenario: HVAC controller connecting to BACnet/IP network over structured cabling spanning multiple floors. IC Role / Device Role / Timing Role: Full-duplex 100BASE-TX transceiver interfacing with microcontroller's MII peripheral; handles auto-negotiation and parallel detection per IEEE 802.3u. Use Value: Integrated LED drivers (AN0/AN1) provide local diagnostics without external GPIOs; RBIAS-based calibration ensures consistent link quality across 100+ node deployments. |
Use Scenario: Small-cell radio unit requiring low-latency fronthaul to centralized baseband unit via Ethernet. IC Role / Device Role / Timing Role: PHY layer in CPRI-over-Ethernet implementation; supports precise timestamping via recovered RX_CLK and deterministic packet latency. Use Value: Error-free operation beyond 137 m allows flexible placement of radios on rooftops or poles without repeaters; industrial grade ensures uptime in outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Ethernet PHY applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DP83848ISQ/NOPB | Same pinout and feature set, but rated for –40°C to +125°C (Extreme temp grade); higher max junction temperature (150°C). | Suitable for under-hood automotive or high-ambient industrial enclosures where ambient exceeds 85°C. | Select DP83848ISQ/NOPB only if operating ambient exceeds 85°C; otherwise DP83848KSQ/NOPB offers optimal cost/performance balance for standard industrial use. |
| LAN8720AI-CP | 24-pin QFN, 3.3-V only, no RMII support, lower ESD (2 kV HBM), no CLK_OUT or LED_SPEED pin. | Targeted at space-constrained consumer IoT nodes; lacks industrial temp range and dual-interface flexibility. | Choose LAN8720AI-CP for cost-sensitive, size-limited designs without RMII or industrial temp needs; DP83848KSQ/NOPB remains preferred for robustness and interface versatility. |
Compared with DP83848ISQ/NOPB, DP83848KSQ/NOPB trades extreme temperature capability for lower cost and identical industrial-grade reliability; versus LAN8720AI-CP, it delivers superior ESD immunity, dual MAC interface support, and longer cable reach - making it the engineering choice for mission-critical industrial Ethernet endpoints.
Availability
DP83848KSQ/NOPB is available at Aetrix Electronics and suitable for industrial automation gateways, factory control systems, and building management nodes requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from authorized channels.
Supply support for DP83848KSQ/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 decades of Ethernet PHY innovation and broad industrial qualification expertise.
The DP83848x family was designed specifically for space-constrained, high-reliability embedded Ethernet applications - emphasizing low power, robust ESD performance, long-cable interoperability, and flexible MAC interface options for industrial and infrastructure markets.
FAQ
What is the operating temperature range of the DP83848KSQ/NOPB?
The DP83848KSQ/NOPB is rated for industrial operation from –40°C to +85°C. This range is validated per JEDEC JESD22-A104 and supports deployment in harsh environments such as factory floors, outdoor control cabinets, and building automation nodes without forced cooling or derating.
Does DP83848KSQ/NOPB support RMII interface, and how is it enabled?
Yes, DP83848KSQ/NOPB supports RMII mode via the MII_MODE strap on pin 32 (RX_DV). Pulling this pin high during reset configures the device for RMII operation using a 50 MHz X1 reference clock; the default (pulldown) is MII mode with separate TX_CLK/RX_CLK signals.
Is CLK_OUT available on DP83848KSQ/NOPB?
No, DP83848KSQ/NOPB does not provide a CLK_OUT signal. That function is exclusive to DP83848H, DP83848M, and DP83848T variants (on pin 21). On DP83848KSQ/NOPB, pin 21 is dedicated to LED_SPEED/AN1 and cannot be repurposed as a clock output.
How is Auto-MDIX configured on DP83848KSQ/NOPB?
Auto-MDIX is enabled by default on DP83848KSQ/NOPB. To disable it, apply a pulldown resistor to pin 34 (RX_ER / MDIX_EN) during reset. The internal pullup ensures Auto-MDIX remains active unless explicitly overridden - simplifying design for most standard Ethernet deployments.
What is the purpose of the RBIAS pin on DP83848KSQ/NOPB?
The RBIAS pin (pin 20) connects to a precision 4.87 kΩ ±1% resistor to ground, setting internal bias currents for the 100BASE-TX transmitter and 10BASE-T receiver. Accurate RBIAS value ensures compliant output voltage levels (VTPTD_100 = 0.95–1.05 V) and reliable signal detect thresholds across temperature and voltage.
DP83848KSQ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Transceiver
- Protocol:
- Ethernet
- Number of Drivers/Receivers:
- 1/1
- Duplex:
- -
- Receiver Hysteresis:
- -
- Data Rate:
- -
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-WQFN (6x6)
DP83848KSQ/NOPB FAQ
1.How can I place an order for DP83848KSQ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for DP83848KSQ/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 DP83848KSQ/NOPB reliable?
The price and inventory of DP83848KSQ/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DP83848KSQ/NOPB is usually 5 days.
3.What payment methods are accepted for DP83848KSQ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DP83848KSQ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DP83848KSQ/NOPB?
DP83848KSQ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DP83848KSQ/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 DP83848KSQ/NOPB?
For technical support, including DP83848KSQ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DP83848KSQ/NOPB requirements.
6.How does Aetrix verify that DP83848KSQ/NOPB is sourced from the original manufacturer or authorized distributors?
All DP83848KSQ/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 DP83848KSQ/NOPB meets industry standards.
7.What is the process for return or replacement of DP83848KSQ/NOPB?
All DP83848KSQ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with DP83848KSQ/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 DP83848KSQ/NOPB part is unused and in its original packaging.
Return procedure for DP83848KSQ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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