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NXP Semiconductors LPC2468FET208,551
- Part No.:
- LPC2468FET208,551
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 208-TFBGA
- Datasheet:
-
LPC2468FET208,551.pdf
- Description:
- IC MCU 16/32BIT 512KB 208TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,679
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Product details
Overview
LPC2468FET208 from NXP Semiconductors is a 32-bit ARM7TDMI-S microcontroller operating at up to 72 MHz, featuring 512 kB flash, 98 kB SRAM (including 16 kB Ethernet RAM and 2 kB RTC-powered SRAM), dual AHB buses, and integrated Ethernet MAC with MII/RMII support. It serves as a communication gateway controller in industrial protocol conversion systems requiring concurrent USB 2.0 device/host/OTG, dual CAN, four UARTs, and SD/MMC interface.
For engineers reviewing the LPC2468FET208 datasheet, LPC2468FET208 pinout, LPC2468FET208 application, or LPC2468FET208 equivalent, key selection considerations include TFBGA208 package compatibility, 72 MHz real-time execution from flash, dual-AHB DMA concurrency for Ethernet/USB, 10-bit ADC/DAC integration, and support for RMII/MII Ethernet physical layer interfacing.
Technical Context
The LPC2468FET208 implements an ARM7TDMI-S core with JTAG and embedded trace debug interfaces, executing both 32-bit ARM and 16-bit Thumb instructions to balance performance and code density. Its flash accelerator enables full 72 MHz CPU operation directly from on-chip memory without external wait states.
Dual Advanced High-performance Bus (AHB) architecture isolates Ethernet DMA, USB DMA, and CPU instruction fetch paths-eliminating bus contention during simultaneous high-bandwidth peripheral operation. The device integrates dedicated SRAM blocks per subsystem: 16 kB for Ethernet, 16 kB for general-purpose DMA, and 2 kB battery-backed RTC SRAM for persistent data retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM7TDMI-S, 32-bit/16-bit Thumb, up to 72 MHz - enables deterministic real-time control with sub-routine-level instruction set selection. |
| Flash Memory | 512 kB on-chip, ISP/IAP-capable - supports field firmware updates without external programmer or chip removal. |
| SRAM Total | 98 kB distributed: 64 kB local bus SRAM, 16 kB Ethernet SRAM, 16 kB GP/USB DMA SRAM, 2 kB RTC SRAM - optimizes latency-critical subsystem access. |
| Ethernet Interface | Full 32-bit MII/RMII MAC with dedicated AHB and 16 kB buffer SRAM - enables standalone 10/100 Mbps Ethernet node without external PHY buffer. |
| USB Support | USB 2.0 full-speed device/host/OTG with on-chip PHY and 4 kB endpoint RAM - eliminates need for external transceiver in dual-role applications. |
| Analog Peripherals | 10-bit ADC (8-channel), 10-bit DAC (1-channel), RTC with separate power domain - provides sensor interface and low-power timekeeping without external components. |
| Serial Interfaces | 4× UARTs (with FIFO, fractional baud), 2× CAN, 3× I²C, 2× SSP, SPI, I²S, SD/MMC - supports multi-protocol bridging in industrial gateways. |
| Power Management | Four reduced-power modes (idle/sleep/power-down/deep power-down); brownout detect with dual thresholds - enables robust operation across wide industrial temperature range (−40 °C to +85 °C). |
Pinout & Package
Package: TFBGA208 (plastic thin fine-pitch ball grid array; 208 balls; body 15 × 15 × 0.7 mm; SOT950-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1[0]/ENET_TXD0 | Ethernet transmit data line 0 | Drives bit 0 of parallel MII/RMII Ethernet transmit data bus; requires impedance-controlled PCB routing for signal integrity. |
| P1[9]/ENET_RXD0 | Ethernet receive data line 0 | Receives bit 0 of parallel MII/RMII Ethernet receive data bus; referenced to ENET_RX_CLK or ENET_REF_CLK. |
| P1[4]/ENET_TX_EN | Ethernet transmit enable | Active-high strobe enabling transmission on all ENET_TXD[n] lines; synchronized to ENET_TX_CLK in MII mode. |
| P1[15]/ENET_REF_CLK/ENET_RX_CLK | Ethernet reference/receive clock | 50 MHz input (RMII) or 25 MHz input (MII); serves as timing reference for both transmit and receive paths. |
| P1[17]/ENET_MDIO | Management Data Input/Output | Bi-directional serial interface for configuring external PHY via IEEE 802.3 MIIM protocol. |
| P1[16]/ENET_MDC | Management Data Clock | Asynchronous clock (≤2.5 MHz) driving ENET_MDIO transactions with external PHY. |
| P0[29]/USB_D+1 | USB port 1 D+ line | Differential data line for USB 2.0 full-speed signaling; requires 90 Ω differential impedance and series termination. |
| P0[30]/USB_D−1 | USB port 1 D− line | Complementary differential data line for USB 2.0 full-speed; routed as matched pair with P0[29]. |
| P0[31]/USB_D+2 | USB port 2 D+ line | Second independent USB full-speed D+ line supporting OTG host/device role switching. |
| P0[12]/USB_PPWR2 | USB port 2 power enable | Open-drain output controlling external VBUS switch for USB host-mode power delivery on port 2. |
| P0[14]/USB_CONNECT2 | USB port 2 SoftConnect control | Drives 1.5 kΩ pull-up resistor on D+ to signal device attachment to host; software-controllable for enumeration reset. |
| P0[26]/AOUT | 10-bit DAC analog output | Single-ended voltage output (0–VDDA) for precision analog waveform generation or sensor calibration reference. |
| P0[23]–P0[26]/AD0[0]–AD0[3] | ADC input channels 0–3 | Four of eight 10-bit SAR ADC inputs with programmable gain and burst mode; sampled simultaneously with internal reference. |
| P2[10]/EINT0 | External interrupt 0 input | Edge-triggered GPIO interrupt source mapped to VIC channel 0; supports wake-up from power-down mode. |
| P2[11]/EINT1 | External interrupt 1 input | Edge-triggered GPIO interrupt source mapped to VIC channel 1; configurable as rising/falling/both-edge sensitive. |
| P2[12]/EINT2 | External interrupt 2 input | Edge-triggered GPIO interrupt source mapped to VIC channel 2; shares pin with I²STX_WS for audio sync triggering. |
| P2[13]/EINT3 | External interrupt 3 input | Edge-triggered GPIO interrupt source mapped to VIC channel 3; supports wake-up from deep power-down mode. |
| P0[4]/I2SRX_CLK | I²S receive clock input | Master-generated bit clock (BCLK) for I²S slave receive path; drives internal sampling logic synchronously. |
| P0[5]/I2SRX_WS | I²S receive word select | Left/right channel indicator (LRCLK) for I²S receive; toggles per sample frame to demultiplex stereo data. |
| P0[6]/I2SRX_SDA | I²S receive data input | Serial data input aligned to I2SRX_CLK edges; supports MSB-first, 16/24/32-bit word lengths. |
| P0[7]/I2STX_CLK | I²S transmit clock output | Generated master clock for I²S transmit path; frequency = sample rate × word length × 2. |
| P0[8]/I2STX_WS | I²S transmit word select | Transmit LRCLK output toggling per sample; used to synchronize external DAC or codec. |
| P0[9]/I2STX_SDA | I²S transmit data output | Serial data output driven on I2STX_CLK rising edge; supports left-justified, right-justified, and I²S formats. |
Key Features
| Feature | Design Value |
|---|---|
| Dual AHB system | Enables concurrent Ethernet DMA, USB DMA, and CPU flash execution without arbitration delay or bandwidth starvation. |
| On-chip 4 MHz RC oscillator | 1 % accuracy trimmed internal clock source usable as system clock; eliminates need for external crystal when USB/CAN are inactive. |
| Boundary scan (JTAG) | IEEE 1149.1-compliant test infrastructure enabling automated PCB continuity and short-circuit verification. |
| Versatile pin function selection | Pin Connect Block allows dynamic remapping of peripherals (e.g., UART ↔ SSP ↔ I²C) to optimize PCB layout and reuse. |
| Real-time debug & trace | Embedded Trace Macrocell (ETM) and JTAG interface support non-intrusive instruction tracing and breakpoint debugging. |
| Independent power domains | Separate VDD(DCDC) and VDD(3V3) rails allow selective shutdown of analog, USB, or Ethernet subsystems to reduce active power by 20–30 %. |
Applications
| Industrial Protocol Converter | Medical Device Gateway |
|---|---|
Use Scenario: Translating Modbus RTU over RS-485 to EtherNet/IP for legacy PLC integration into modern SCADA networks. IC Role / Device Role / Timing Role: Central protocol translation engine with dual CAN and four UARTs handling serial fieldbus parsing, while Ethernet MAC forwards encapsulated packets. Use Value: Eliminates need for external FPGA or dual-processor architecture; 512 kB flash stores multiple protocol stacks and configuration profiles. | Use Scenario: Aggregating patient vital sign data from multiple bedside monitors (via UART/I²C) and transmitting securely over hospital Ethernet/WiFi. IC Role / Device Role / Timing Role: Real-time data concentrator with 10-bit ADC sampling ECG leads, RTC timestamping, and USB OTG for clinical staff firmware updates. Use Value: 2 kB RTC SRAM retains critical alarm logs during main power loss; USB OTG enables secure, tool-free firmware validation and deployment. |
| Multi-Interface Communication Hub | Embedded Control System |
Use Scenario: Smart building controller interfacing HVAC (BACnet MS/TP via UART), lighting (DALI via UART), and security (CAN bus) subsystems to central BMS server. IC Role / Device Role / Timing Role: Deterministic scheduler managing time-critical CAN message deadlines, UART framing, and Ethernet packet queuing via VIC and GPDMA. Use Value: Four external interrupt pins (EINT0–EINT3) trigger immediate response to door sensor or fire alarm events without polling overhead. | Use Scenario: Motor control unit for HVAC blower with three-phase PWM generation, current sensing (ADC), and thermal monitoring (RTC-backed logging). IC Role / Device Role / Timing Role: Real-time motion controller using two PWM/timer blocks with external count inputs for encoder feedback and phase synchronization. Use Value: Dedicated 16 kB SRAM for Ethernet and 16 kB for GP/USB DMA prevents memory contention during simultaneous motor control and remote diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LPC2368FBD100 | 100-pin LQFP, no Ethernet MAC, 256 kB flash, same ARM7TDMI-S core and peripheral set minus Ethernet/USB OTG. | Suitable for cost-sensitive, space-constrained designs where Ethernet connectivity is unnecessary. | Select when board area and BOM cost outweigh need for integrated 10/100 Ethernet and dual USB ports. |
| LPC1769FBD208 | Cortex-M3 core, 512 kB flash, 64 kB RAM, Ethernet MAC, USB 2.0 OTG, but no RTC SRAM or dual-AHB architecture. | Better suited for applications requiring higher CPU throughput and CMSIS-based toolchain compatibility over legacy ARM7 real-time determinism. | Choose for new designs prioritizing ARM Cortex ecosystem support and higher clock efficiency over proven ARM7 interrupt latency. |
Compared with LPC2368FBD100, the LPC2468FET208 adds integrated Ethernet MAC and USB OTG at the cost of larger TFBGA208 footprint; versus LPC1769FBD208, it retains deterministic ARM7 interrupt response and RTC-backed SRAM but lacks Cortex-M3 vector table remapping and NVIC flexibility.
Availability
LPC2468FET208 is available at Aetrix Electronics and suitable for industrial protocol converters, medical device gateways, multi-interface communication hubs, and embedded control systems requiring stable component supply across extended product lifecycles.
Supply support for LPC2468FET208 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The LPC2400 series, including LPC2468FET208, was engineered specifically for high-integration industrial communication gateways requiring concurrent multi-protocol support, deterministic real-time response, and long-term availability in harsh environments.
FAQ
What is the maximum operating frequency of the LPC2468FET208 microcontroller?
The LPC2468FET208 operates at a maximum system clock frequency of 72 MHz. This is achieved using the on-chip PLL driven by either the main crystal oscillator (1–25 MHz), the internal 4 MHz RC oscillator, or the RTC oscillator. The flash accelerator enables zero-wait-state execution at this full speed, ensuring deterministic real-time performance without external memory latency penalties.
Does the LPC2468FET208 support both MII and RMII Ethernet physical layer interfaces?
Yes, the LPC2468FET208 Ethernet MAC supports both MII and RMII modes via the same pin set (P1[0]–P1[17]). Configuration is controlled by the EMAC Command Register (EMAC_CMD). In RMII mode, only seven pins are required (vs. 16 for MII), reducing PCB complexity and pin count while maintaining 10/100 Mbps capability - ideal for space-constrained industrial gateways.
How much SRAM is allocated specifically for Ethernet operations in the LPC2468FET208?
The LPC2468FET208 allocates 16 kB of dedicated SRAM for Ethernet interface operations. This memory is accessible exclusively by the Ethernet MAC DMA controller and is physically isolated on the AHB1 bus, preventing contention with CPU or USB DMA traffic. It serves as packet buffer storage for both transmit and receive descriptors and frame data in standard TCP/IP stack implementations.
Can the LPC2468FET208 retain data during main power loss?
Yes, the LPC2468FET208 includes 2 kB of battery-backed SRAM powered from the RTC power domain (VBAT pin). When main VDD(3V3) is removed, this memory retains critical data such as alarm logs, calibration coefficients, or last-known state - provided a coin-cell or supercapacitor is connected to VBAT. The RTC oscillator continues running to maintain timekeeping and wake-up capability.
What debug interfaces does the LPC2468FET208 provide for firmware development?
The LPC2468FET208 provides standard ARM JTAG (TCK/TMS/TDI/TDO/TRST/RTCK) and SWD-compatible boundary-scan interfaces for programming and real-time debugging. It also integrates an Emulation Trace Module (ETM) supporting instruction trace via dedicated trace port pins, enabling non-intrusive analysis of program flow, branch coverage, and timing-critical ISR behavior during development of the LPC2468FET208.
LPC2468FET208,551 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 208-TFBGA
- Series:
- LPC2400
- Packaging:
- Tray
- Product Status:
- Discontinued at Digi-Key
- Programmable:
- Not Verified
- Core Processor:
- ARM7®
- Core Size:
- 16/32-Bit
- Speed:
- 72MHz
- Connectivity:
- CANbus, EBI/EMI, Ethernet, I2C, Microwire, Memory Card, SPI, SSI, SSP, UART/USART, USB OTG
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 160
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 98K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 3.6V
- Data Converters:
- A/D 8x10b; D/A 1x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LPC2468FET208,551 FAQ
1.How can I place an order for LPC2468FET208,551 through Aetrix?
Please submit a Request for Quotation (RFQ) for LPC2468FET208,551 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 LPC2468FET208,551 reliable?
The price and inventory of LPC2468FET208,551 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC2468FET208,551 is usually 5 days.
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Once your LPC2468FET208,551 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 LPC2468FET208,551?
For technical support, including LPC2468FET208,551 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC2468FET208,551 requirements.
6.How does Aetrix verify that LPC2468FET208,551 is sourced from the original manufacturer or authorized distributors?
All LPC2468FET208,551 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 LPC2468FET208,551 meets industry standards.
7.What is the process for return or replacement of LPC2468FET208,551?
All LPC2468FET208,551 units undergo pre-shipment inspection (PSI). If there is an issue with LPC2468FET208,551, 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 LPC2468FET208,551 part is unused and in its original packaging.
Return procedure for LPC2468FET208,551:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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