DP83848MPTBEP - Military 10/100 Ethernet PHY | Texas Instruments
MPN: DP83848MPTBEP ✓ ActiveDP83848MPTBEP Overview
An Ethernet physical-layer transceiver, commonly called an Ethernet PHY, converts digital Ethernet data into signals suitable for transmission over twisted-pair cabling and converts received signals back into digital data. A PHY therefore forms the physical interface between a network controller or microprocessor and a 10/100BASE-T Ethernet connection. Supporting MII and RMII gives the DP83848MPTBEP flexibility to connect either a parallel MII interface or a reduced-pin RMII interface, making it suitable for systems with different host-controller constraints.
The DP83848MPTBEP combines a 10/100 Mb/s Ethernet data path with a broad -55°C to 125°C operating range. Its full-duplex mode supports simultaneous transmission and reception, while half-duplex operation remains available for designs using shared-medium arrangements. The 48-pin HLQFP package provides a defined leaded footprint for leaded PCBs, and the seven-by-seven-millimetre body supports compact industrial, communications, defense, and test equipment assemblies.
Enhanced ESD protection is a central feature of this enhanced-product PHY. Ethernet ports are commonly exposed to user-accessible cables and therefore can encounter electrostatic discharge events. Positioning the protection and signal-conditioning functions inside the PHY helps preserve communication reliability when the connector is no more than a short cable run from the circuit board. The MII and RMII interfaces allow the same physical-layer device to support controllers designed around either parallel-data architecture.
Typical uses include ruggedized Ethernet data links, industrial control equipment, communications modules, military electronics, instrumentation, and embedded systems operating across extended temperature ranges. The PHY can be paired with an Ethernet-capable controller or microcontroller through MII or RMII. Designers must still account for the selected interface voltage levels, required external magnetics, termination, isolation strategy, clock arrangement, and separation between high-energy switching nodes and sensitive Ethernet signals.
The primary design consideration is the relationship between operating temperature, PCB material, leaded-package soldering, and the copper and magnetics selected for the magnetics interface. Place the DP83848MPTBEP and its supporting network components to minimize loop area on each differential pair, route each pair as a controlled-impedance transmission line, and follow the manufacturer's recommended magnetic-component layout. Verify startup behavior, link negotiation, clock requirements, and fault handling across the complete product temperature range.
This product overview combines the manufacturer’s device description, exact ordering information, package details, operating limits, and interface features with practical guidance for rugged Ethernet implementation. It also distinguishes the verified DP83848 family alternatives from unsupported substitutions and identifies the parameters that must be checked before any replacement is approved.
Drop-in alternatives for DP83848MPTBEP — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with DP83848MPTBEP (same form factor and footprint) — differing in Operating Temperature Range, Package, Product Type.
DP83848MPTBREP
✅ Drop-In📋 Reference alternative (not in catalog)
DP83848MPHPEP
✅ Drop-InContact for price
View Datasheet →DP83848MPTBEP Specifications
| Product Type | Single-port 10/100 Mb/s Ethernet physical-layer transceiver |
| Ethernet Data Rate | 10/100 Mb/s |
| Duplex Support | Full duplex and half duplex |
| Number of Drivers/Receivers | 1/1 |
| Host Interface | MII and RMII |
| Operating Temperature Range | -55°C to +125°C |
| Package | 48-pin HLQFP, 7 x 7 mm |
| Mounting Type | Surface mount |
| ESD Protection | Enhanced ESD protection |
| Product Series | DP83848-EP |
| Standards Compliance | IEEE 802.3u |
| Ethernet Port Count | 1 port |
| Maximum Link Data Rate | 100 Mb/s |
DP83848MPTBEP 48-pin hlqfp, 7 x 7 mm Pin Configuration Guide
Pin configuration for DP83848MPTBEP (48-pin hlqfp, 7 x 7 mm package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for DP83848MPTBEP.
Refer to the datasheet for full pin configuration.
Typical Applications
DP83848MPTBEP is suitable for 6 applications: Ruggedized Industrial Ethernet, Military Communications Equipment, Industrial Control Ethernet Ports, Test and Measurement Instrumentation, Communications and Network Appliances, Embedded Data Acquisition Systems.
Ruggedized Industrial Ethernet
The DP83848MPTBEP fits industrial Ethernet equipment that must operate across a -55°C to 125°C range while maintaining a conventional 10/100 Mb/s twisted-pair connection. Its MII and RMII interfaces allow the design to accommodate different controller families while retaining a single Ethernet physical-layer device. Enhanced ESD protection is especially relevant when the connector is exposed to electrically noisy industrial environments. The 48-pin HLQFP package is suitable for a leaded, rugged PCB assembly. Designers should use controlled-impedance routing for each differential pair, place the magnetic network interface according to the manufacturer layout, and verify link startup and operation across the complete system thermal range.
Recommended
Military Communications Equipment
The DP83848MPTBEP is positioned for military and defence communications equipment requiring an Ethernet PHY beyond commercial-temperature limits. Its specified -55°C to 125°C range supports harsh operating environments, while the 10/100 Mb/s data rate provides a compatible link for embedded command, monitoring, and configuration networks. Both MII and RMII host interfaces support different processor architectures without changing the physical-layer device. Qualification must extend beyond the IC temperature rating: the magnetics, isolation components, connector, PCB laminate, and enclosure should also be suitable for the deployed environmental profile and mission requirements.
Recommended
Industrial Control Ethernet Ports
The DP83848MPTBEP can serve as the physical-layer device in industrial controllers that require a stable 10/100 Mb/s Ethernet management or control port. RMII is useful when the host controller has limited pin availability, while MII supports systems designed around a wider parallel bus. The enhanced-product temperature range allows the PHY to be used in controllers exposed to wide internal temperature variation. For a robust implementation, keep the Ethernet pairs away from switching nodes and high-current power stages, maintain the specified differential pair geometry, and verify magnetic-component layout against the manufacturer reference design.
Recommended
Test and Measurement Instrumentation
The DP83848MPTBEP is appropriate for Ethernet-enabled test and measurement instruments that need a reliable 10/100 Mb/s port and a wide operating-temperature range. Instrument systems commonly use RMII to reduce host-interface pin count while retaining full-duplex Ethernet operation. The PHY can connect to an embedded controller and then to a network magnetics interface selected for the installation environment. Engineering checks should include clock sourcing, startup sequencing, link-negotiation behavior, isolation requirements, and conducted or radiated emissions testing. Its 48-pin HLQFP package also requires a PCB footprint and solder process suitable for a leaded package.
Recommended
Communications and Network Appliances
The DP83848MPTBEP can provide the 10/100 Mb/s copper-Ethernet interface in communications equipment, service appliances, and remote monitoring systems. Full-duplex operation supports continuous bidirectional data transfer, and the availability of MII and RMII gives the board designer flexibility in host-controller selection. The -55°C to 125°C range is useful in outdoor or unheated communication installations. To obtain reliable operation, implement the manufacturer’s magnetic-interface layout, preserve pair symmetry, provide the required clocking and decoupling, and use an isolation strategy when the port connects to an externally accessible cable or a different ground domain.
Recommended
Embedded Data Acquisition Systems
The DP83848MPTBEP is suitable for embedded data-acquisition equipment that transports measurements and configuration data over a 10/100 Mb/s Ethernet link. A controller can use RMII for a compact host connection, while the PHY provides the physical-layer interface to standard twisted-pair cabling. The device’s extended temperature range supports equipment intended for demanding industrial installations, and enhanced ESD protection adds margin at an exposed connector. System designers should budget correct magnetics, account for insertion loss and return loss in the channel, avoid discontinuities in differential routing, and test link behavior during power-up, brownout, and network-cable removal conditions.
Recommended
Recommended Products Summary
Engineering reference data for DP83848MPTBEP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DP83848MPTBREP | DP83848MPHPEP |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 48-pin HLQFP (7 x 7 mm) | 48-pin HLQFP (7 x 7 mm) | 48-pin HLQFP (7 x 7 mm) |
| Ethernet Data Rate | 10/100 Mb/s | 10/100 Mb/s | 10/100 Mb/s |
| Host Interface | MII and RMII | MII and RMII | MII and RMII |
| Duplex Support | Full duplex and half duplex | Full duplex and half duplex | Full duplex and half duplex |
| Number of Ports | 1 | 1 | 1 |
Key Differentiators
- Military-temperature enhanced-product positioning (vs DP83848MPHPEP)
- Full MII and RMII interface support (vs DP83848MPTBREP)
- Documented enhanced ESD protection (vs DP83848MPHPEP)
Design Notes
Route the Ethernet differential pairs as controlled-impedance, tightly coupled traces with continuous reference planes and no plane splits beneath the pair. Keep the PHY, magnetics, and connector path aligned so that each differential pair maintains consistent geometry and minimizes vias. Follow the manufacturer’s magnetic-component layout because the relative positions of the PHY, isolation components, magnetics, and connector materially affect return loss and common-mode performance.
Do not treat a matching 48-pin package as sufficient proof of drop-in compatibility. Before substituting DP83848MPTBREP or DP83848MPHPEP, compare the complete ordering code, pin-description table, temperature range, clock configuration, supply requirements, and package drawing. In particular, verify whether the ordering suffix changes qualification or production attributes. A replacement should receive board-level power, reset, link, and environmental testing before approval.
Separate the Ethernet port from switching regulators, high-current relays, motor drivers, and other noisy power stages to reduce common-mode conversion and EMC risk. Use the lowest practical connection impedance for the selected interface and avoid long parallel traces beneath the RMII or MII bus. Validate emissions and immunity at the finished-product level, including cable insertion, removal, and fault conditions, because PHY compliance alone does not guarantee enclosure-level performance.
Follow the manufacturer guidance for supply decoupling, clock stability, reset behavior, and the magnetic-network interface. Keep the PHY supply path compact and place local high-frequency bypass capacitance at the device pins using a layout consistent with the reference design. Confirm that the host controller, PHY clock source, and magnetics can start in all required power states, particularly when the system must operate through brownout, cold-start, and Ethernet cable insertion events.
Compliance Information
The manufacturer states IEEE 802.3u compliance. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status require confirmation from the current manufacturer product documentation.
