266 MHz ARM926EJ-S — what the clock buys you
The LPC3240FET296/01551 runs an ARM926EJ-S core at 266 MHz. That clock rate places it in the mid-range of the LPC3200 family — enough throughput for a real-time Ethernet stack with headroom for a control loop, but not the top-bin part if you need multiple protocol stacks or heavy DSP work. The 16/32-Bit core size means legacy 16-bit code lifts cleanly, but the compiler targets ARM mode for performance. At 266 MHz, expect bus timing to be the constraint on external memory access, not the core itself.
ROMless with 256 KB SRAM — plan for external code storage
This part has no internal Flash or ROM — program memory type is ROMless. The 256K x 8 SRAM is for data, not code. You must boot from external NOR Flash, NAND, or SRAM via the EBI/EMI interface. That means a companion memory chip on the BOM and careful PCB layout for the parallel bus. The 296-TFBGA (15x15 mm) package gives enough ball count for a wide external bus plus the peripheral I/O. The 0.9 V to 3.6 V supply range covers core and I/O voltages; the external memory will dictate the actual rail.
Peripheral set for industrial and motor control
The connectivity list is broad: Ethernet MAC, USB OTG, multiple SPI/SSP, I²C, UART/USART, plus IrDA and Microwire. The Motor Control PWM and general-purpose PWM, along with the DMA controller and the 3-channel 10-bit ADC, make this a natural fit for a servo drive or inverter control board that also needs an Ethernet fieldbus interface. The 51 general-purpose I/O are enough for a modest HMI or I/O bank, but not for a high-density PLC backplane. Operating temperature is -40°C to 85°C — industrial grade for factory-floor or outdoor cabinet use.
Sourcing and lifecycle
The LPC3240FET296/01551 is listed as Active in production. No LTB or obsolescence notice is on record. For BOM planning, this means the part is still a standard catalog item from NXP, not a surplus-only find. Availability and current pricing are confirmed at quote time through independent distribution — sourced and quoted to order against an RFQ.