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DP83849IVSX/NOPB
Texas Instruments
IC TRANSCEIVER 2/2 80TQFP
17566 Pcs New Original In Stock
2/2 Transceiver Ethernet 80-TQFP (12x12)
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5.0 / 5.0
- (22 Ratings)
DP83849IVSX/NOPB
Product Overview
1443983
DiGi Electronics Part Number
DP83849IVSX/NOPB-DGManufacturer
Texas Instruments
DP83849IVSX/NOPB
Description
IC TRANSCEIVER 2/2 80TQFPInventory
17566 Pcs New Original In Stock
2/2 Transceiver Ethernet 80-TQFP (12x12)
Quantity
Minimum 1
Minimum 1
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DP83849IVSX/NOPB Technical Specifications
Category
Interface, Drivers, Receivers, Transceivers
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Active
Type
Transceiver
Protocol
Ethernet
Number of Drivers/Receivers
2/2
Duplex
-
Data Rate
-
Voltage - Supply
3V ~ 3.6V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
80-TQFP
Supplier Device Package
80-TQFP (12x12)
Base Product Number
DP83849
Datasheet & Documents
Manufacturer Product Page
DP83849IVSX/NOPB Specifications
HTML Datasheet
DP83849IVSX/NOPB-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
5A991B1
HTSUS
8542.39.0001
Additional Information
Other Names
296-46291-1
296-46291-2
DP83849IVSX/NOPB-DG
DP83849IVSX-DG
DP83849IVSX
296-46291-6
Standard Package
1,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
Ich habe bisher keine bessere Kombination aus Preis und Qualität gefunden.
de desembre 02, 2025
The after-sales support team is professional and always friendly.
de desembre 02, 2025
Their products are trustworthy, performing flawlessly over time.
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Frequently Asked Questions (FAQ)
Can the DP83849IVSX/NOPB be safely used as a drop-in replacement for the Microchip LAN8720A in a 100BASE-TX industrial Ethernet design, and what layout or firmware changes might be required?
The DP83849IVSX/NOPB is not a direct drop-in replacement for the LAN8720A due to fundamental architectural differences—the DP83849IVSX/NOPB is a dual-port 10/100 Ethernet transceiver in an 80-TQFP package, while the LAN8720A is a single-port device in a smaller QFN. You’ll need to rework the PCB layout to accommodate the larger footprint, adjust power supply decoupling (the DP83849IVSX/NOPB requires careful 3.3V rail stability), and modify the MAC interface configuration since the DP83849IVSX/NOPB supports MII/ RMII modes that may differ from your current setup. Additionally, auto-negotiation and PHY register maps are incompatible, so firmware must be updated to handle the DP83849IVSX/NOPB’s register set and interrupt behavior.
What are the key thermal and PCB layout risks when designing with the DP83849IVSX/NOPB in a high-density industrial controller operating near 85°C ambient?
Operating the DP83849IVSX/NOPB near its 85°C limit demands strict thermal management. The 80-TQFP package lacks an exposed pad, so heat dissipation relies heavily on PCB copper. Use multiple thermal vias under the IC and connect them to internal ground planes to avoid thermal buildup. Keep trace lengths short for differential pairs (TX±, RX±) and maintain controlled impedance (100Ω differential) to prevent signal integrity degradation at high temperatures. Also, ensure adequate spacing from heat-generating components like power regulators, as localized heating can push the junction temperature beyond safe limits and accelerate electromigration or timing drift in the internal PLLs.
How does the DP83849IVSX/NOPB compare to the newer TI DP83822I for new designs requiring extended temperature range and lower power—should I consider migrating?
For new designs, the DP83822I offers significant advantages over the DP83849IVSX/NOPB: lower power consumption (~130mW vs ~250mW per port), integrated termination resistors, and enhanced ESD protection (±16kV contact discharge). While both support -40°C to 85°C, the DP83822I is more suitable for compact, power-sensitive industrial systems. However, if your design already leverages the DP83849IVSX/NOPB’s dual-port capability and you’re constrained by BOM cost or legacy firmware, it remains viable. Migrating would require layout changes due to the DP83822I’s smaller 32-QFN package and different pinout, but it reduces overall system complexity and improves long-term reliability in harsh environments.
What are the risks of using the DP83849IVSX/NOPB in a PoE-powered system without additional isolation or surge protection?
The DP83849IVSX/NOPB itself is not rated for direct connection to PoE voltages (up to 57V). Without proper isolation via a PoE PD controller (e.g., TI’s TPS23756) and magnetics with integrated common-mode chokes and center-tap biasing, you risk damaging the transceiver during hot-plug events or voltage transients. Additionally, the device’s MSL-3 rating means it can absorb moisture during storage; if not baked or handled per J-STD-033 before reflow, popcorning during assembly could compromise long-term reliability. Always use IEEE 802.3-compliant magnetics and ensure the RJ45 connector includes TVS diodes rated for IEC 61000-4-5 surge immunity to protect the DP83849IVSX/NOPB’s sensitive analog front-end.
Can I run both ports of the DP83849IVSX/NOPB simultaneously at 100 Mbps in a daisy-chained switch design without external PHYs, and what synchronization issues should I anticipate?
Yes, both ports of the DP83849IVSX/NOPB can operate simultaneously at 100 Mbps, but using it in a daisy-chained switch topology without an external MAC or switch controller introduces significant timing and buffering challenges. The DP83849IVSX/NOPB does not include internal switching logic—it only provides PHY functionality. You must manage frame forwarding, collision domains, and store-and-forward buffering externally. Clock domain crossing between the two ports can cause jitter accumulation if not properly synchronized; use a common reference clock and enable RMII mode with synchronized CRS_DV signals to minimize skew. Also, monitor CRC error rates under load, as simultaneous bidirectional traffic may expose latency mismatches in your MAC interface logic, especially if using software-based bridging.
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DP83849IVSX/NOPB CAD Models
Texas Instruments DP83849IVSX/NOPB PCB symbols & footprints
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