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NXP Semiconductors LPC2420FBD208,551
- Part No.:
- LPC2420FBD208,551
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 208-LQFP
- Datasheet:
-
LPC2420FBD208,551.pdf
- Description:
- IC MCU 16/32BIT ROMLESS 208LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,272
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Product details
Overview
LPC2420FBD208 from NXP Semiconductors is a flashless 32-bit ARM7TDMI-S microcontroller operating at up to 72 MHz, featuring 82 kB on-chip SRAM (64 kB local + 16 kB general-purpose DMA + 2 kB RTC-powered), four UARTs, USB 2.0 full-speed device/host/OTG controller with 4 kB endpoint RAM, and 160 GPIO pins. It is designed for industrial control and protocol conversion applications requiring robust serial connectivity without embedded flash.
For engineers reviewing the LPC2420FBD208 datasheet, LPC2420FBD208 pinout, LPC2420FBD208 application, or LPC2420FBD208 equivalent, key selection considerations include its flashless architecture requiring external memory boot, dual-AHB bus support for concurrent USB and DMA transfers, 10-bit ADC/DAC integration, and LQFP208 package compatibility with legacy ARM7-based designs.
Technical Context
The LPC2420FBD208 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 memory subsystem includes 64 kB local SRAM on the ARM local bus, 16 kB SRAM accessible by USB and GPDMA, and 2 kB battery-backed SRAM powered from the RTC domain.
Peripheral integration centers on high-throughput serial communication: USB 2.0 full-speed dual-port controller with integrated PHY and DMA, four UARTs with fractional baud rate generation and FIFOs, three I²C interfaces (one open-drain), two SSP controllers, SPI, I²S, SD/MMC interface, and a 10-bit ADC with 8-channel multiplexing plus 10-bit DAC - all managed via a programmable Pin Connect Block for flexible signal routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM7TDMI-S, 32-bit/16-bit Thumb instruction set, up to 72 MHz operation |
| SRAM | 82 kB total: 64 kB local bus SRAM, 16 kB general-purpose DMA/USB SRAM, 2 kB RTC-battery-backed SRAM |
| USB Interface | Full-speed (12 Mbps) device/host/OTG controller with integrated PHY and 4 kB endpoint RAM |
| Serial Peripherals | Four UARTs (one with IrDA, one with modem I/O), three I²C, two SSP, SPI, I²S, SD/MMC interface |
| Analog Functions | 10-bit ADC with 8 input channels; 10-bit DAC with single output (AOUT) |
| GPIO & Interrupts | 160 general-purpose I/O pins; Vector Interrupt Controller (VIC) supports up to 32 vectored interrupts |
| Package | LQFP208 (28 × 28 × 1.4 mm), lead-free, RoHS-compliant |
Pinout & Package
LQFP208 package: plastic low-profile quad flat package with 208 leads, body size 28 × 28 × 1.4 mm (SOT459-1). Thermal pad exposed on underside for enhanced heat dissipation in industrial environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]/RD1/TXD3/SDA1 | CAN1 receiver / UART3 TX / I²C1 data | Multi-function pin supporting CAN bus reception (LPC2460 only), UART3 transmit, or I²C1 bidirectional data - not open-drain |
| P0[26]/AD0[3]/AOUT/RXD3 | ADC input / DAC output / UART3 RX | Combines analog input (ADC channel 3), analog output (DAC), and UART3 receive - enables compact mixed-signal I/O |
| P1[0]/ENET_TXD0 | Ethernet transmit data 0 | Valid only on LPC2460; absent in LPC2420FBD208 - confirms this variant lacks Ethernet MAC hardware |
| P0[29]/USB_D+1 & P0[30]/USB_D−1 | USB port 1 differential pair | Dedicated full-speed USB 2.0 physical layer pins with internal termination; require external ESD protection per design guidelines |
| VDD(3V3), VSSIO, VSSCORE | Power supply and ground domains | Separate 3.3 V IO supply (VDD(3V3)), IO ground (VSSIO), and core ground (VSSCORE) enable noise isolation for mixed-signal operation |
Key Features
| Feature | Design Value |
|---|---|
| Flashless architecture | Requires external boot memory (NOR/NAND/SD); eliminates flash wear-out concerns and enables field-upgradable firmware images |
| Real-time debug & trace | JTAG interface + Emulation Trace Module enables non-intrusive real-time instruction tracing without halting CPU execution |
| Flexible clocking system | On-chip 4 MHz RC oscillator (±1 %), PLL for up to 72 MHz, and multiple clock dividers reduce active power by 20–30 % per peripheral |
| Power management | Four reduced-power modes (idle, sleep, power-down, deep power-down); wake-up via external interrupt, RTC alarm, or USB activity |
| Pin function remapping | Pin Connect Block allows dynamic assignment of peripheral functions to GPIO pins - resolves board layout conflicts without hardware change |
Applications
| Industrial Control Gateway | Medical Protocol Converter |
|---|---|
Use Scenario: Aggregating Modbus RTU, CANopen, and RS-485 sensor data into Ethernet/IP or TCP/IP streams in factory automation cabinets. IC Role / Device Role / Timing Role: Central protocol translation engine with deterministic UART/CAN timing, USB host for configuration dongles, and SRAM buffering for packet assembly. Use Value: 82 kB SRAM enables multi-protocol frame buffering; 160 GPIOs support discrete I/O expansion; flashless design simplifies firmware updates via external SPI flash. |
Use Scenario: Converting proprietary medical device serial telemetry (e.g., pulse oximeter UART output) to HL7-over-USB or Bluetooth HID profiles in bedside monitors. IC Role / Device Role / Timing Role: Real-time serial-to-USB bridge with precise 10-bit ADC sampling for analog sensor inputs and DAC-driven calibration signals. Use Value: Integrated 10-bit ADC/DAC eliminates external converters; USB OTG supports both device (to PC) and host (to USB peripherals) roles; RTC-backed 2 kB SRAM retains critical calibration data during power loss. |
| Communications Backhaul Node | Legacy System Interface Adapter |
Use Scenario: Bridging T1/E1 line cards to IP networks using PPPoE or SIP signaling in telecom edge equipment. IC Role / Device Role / Timing Role: High-reliability serial communications hub with four UARTs handling simultaneous HDLC, V.35, and RS-232 links, plus USB for management console. Use Value: Fractional baud rate generators ensure precise timing for legacy telecom protocols; 16 kB DMA SRAM prevents UART overrun under burst traffic; 3.3 V single-supply simplifies power design. |
Use Scenario: Retrofitting RS-232/422 industrial PLCs with Ethernet connectivity using minimal PCB space and no flash reprogramming. IC Role / Device Role / Timing Role: Standalone Ethernet-to-serial gateway with external SDRAM boot, leveraging EMC interface for large buffer memory. Use Value: External Memory Controller supports up to 64 MB SDRAM for deep packet buffers; LQFP208 footprint matches legacy ARM7 layouts; no flash erase cycles required for field updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LPC2460FBD208 | Includes Ethernet MAC with MII/RMII, 16 kB Ethernet SRAM, dual CAN channels, and 98 kB total SRAM | Required for designs needing native 10/100 Ethernet PHY interfacing or dual-CAN bus arbitration | Select when Ethernet MAC offload or dual-CAN redundancy is mandatory; otherwise LPC2420FBD208 reduces BOM cost and complexity |
| LPC2368FBD100 | 100-pin LQFP, 512 kB external flash interface, 32 kB SRAM, no USB OTG host mode, no SD/MMC interface | Suitable for cost-sensitive, space-constrained applications where USB host and SD card are unnecessary | Choose for simpler, lower-pin-count designs without USB host or SD/MMC requirements; trade-off is reduced peripheral count and memory |
Compared with LPC2460FBD208, the LPC2420FBD208 removes Ethernet and second CAN channel to reduce cost and power while retaining identical USB, UART, ADC/DAC, and GPIO capabilities; versus LPC2368FBD100, it offers more SRAM, USB OTG host, SD/MMC, and 208-pin expandability at higher pin count and thermal footprint.
Availability
LPC2420FBD208 is available at Aetrix Electronics and suitable for industrial control gateways, medical protocol converters, and communications backhaul nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant LQFP packaging.
Supply support for LPC2420FBD208 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 was developed as a flashless, high-peripheral-count ARM7 platform targeting industrial protocol conversion, medical device interfacing, and legacy system modernization where external memory flexibility and deterministic real-time behavior are critical.
FAQ
Does the LPC2420FBD208 include on-chip flash memory?
No, the LPC2420FBD208 is a flashless microcontroller. It requires external non-volatile memory (e.g., NOR flash, NAND flash, or SD card) for program storage and boot code execution. This architecture eliminates flash endurance limitations and enables rapid firmware updates via external interfaces like USB or UART without erasing internal memory.
What is the maximum operating frequency of the LPC2420FBD208?
The LPC2420FBD208 operates at up to 72 MHz using its on-chip PLL, which can be driven by the main crystal oscillator (1–25 MHz), internal 4 MHz RC oscillator, or RTC oscillator. The 72 MHz clock feeds the ARM7TDMI-S core and APB/AHB peripherals, enabling deterministic real-time response for industrial control loops.
How does the LPC2420FBD208 differ from the LPC2460FBD208 in terms of Ethernet capability?
The LPC2420FBD208 does not include an Ethernet MAC or associated MII/RMII interface - those features are exclusive to the LPC2460FBD208. Consequently, LPC2420FBD208 cannot perform native Ethernet frame processing or connect directly to PHY devices, making it unsuitable for standalone Ethernet node designs but ideal for USB/UART-centric applications.
Can the LPC2420FBD208 support USB host functionality?
Yes, the LPC2420FBD208 integrates a USB 2.0 full-speed device/host/OTG controller with on-chip PHY and 4 kB endpoint RAM. It supports USB host mode for connecting peripherals such as keyboards, storage devices, or configuration dongles - verified in the official NXP LPC2420/2460 datasheet Rev. 6.3.
What power supply requirements does the LPC2420FBD208 have?
The LPC2420FBD208 requires a single 3.3 V supply (operating range 3.0 V to 3.6 V) for VDD(3V3), with separate VDDA (analog supply), VDD(DCDC)(3V3) (DC-DC converter input), and multiple ground domains (VSSIO, VSSCORE, VSSA). Proper decoupling with 100 nF ceramic capacitors near each VDD pin is mandatory per NXP layout guidelines.
LPC2420FBD208,551 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 208-LQFP
- Series:
- LPC2400
- Packaging:
- Tray
- Product Status:
- Discontinued at Digi-Key
- Programmable:
- Not Verified
- Core Processor:
- ARM7®
- Core Size:
- 16/32-Bit
- Speed:
- 72MHz
- Connectivity:
- EBI/EMI, 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:
- -
- Program Memory Type:
- ROMless
- EEPROM Size:
- -
- RAM Size:
- 82K 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:
LPC2420FBD208,551 FAQ
1.How can I place an order for LPC2420FBD208,551 through Aetrix?
Please submit a Request for Quotation (RFQ) for LPC2420FBD208,551 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 LPC2420FBD208,551 reliable?
The price and inventory of LPC2420FBD208,551 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC2420FBD208,551 is usually 5 days.
3.What payment methods are accepted for LPC2420FBD208,551?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPC2420FBD208,551 transactions.
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4.How is shipping managed for LPC2420FBD208,551?
LPC2420FBD208,551 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPC2420FBD208,551 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 LPC2420FBD208,551?
For technical support, including LPC2420FBD208,551 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC2420FBD208,551 requirements.
6.How does Aetrix verify that LPC2420FBD208,551 is sourced from the original manufacturer or authorized distributors?
All LPC2420FBD208,551 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 LPC2420FBD208,551 meets industry standards.
7.What is the process for return or replacement of LPC2420FBD208,551?
All LPC2420FBD208,551 units undergo pre-shipment inspection (PSI). If there is an issue with LPC2420FBD208,551, 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 LPC2420FBD208,551 part is unused and in its original packaging.
Return procedure for LPC2420FBD208,551:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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