NXP Semiconductors LPC4312JET100E

Overview

LPC4312JET100E from NXP Semiconductors is a dual-core ARM Cortex-M4F/M0 microcontroller in TFBGA100 package, operating up to 204 MHz with 512 kB flash (Bank A only), 104 kB SRAM, no Ethernet or LCD controller, and 49 GPIO pins. It integrates hardware FPU, Memory Protection Unit, dual 10-bit ADCs (400 kS/s), 10-bit DAC, USB 2.0 Host/Device interface (no OTG), and supports industrial motor control and power management systems.

For engineers reviewing the LPC4312JET100E datasheet, LPC4312JET100E pinout, LPC4312JET100E application, or LPC4312JET100E equivalent, key selection criteria include its TFBGA100 footprint, absence of Ethernet/LCD, single USB controller with ULPI support, 49 GPIO count, and -40 °C to +105 °C extended temperature rating.

Technical Context

The LPC4312JET100E implements a tightly coupled dual-core architecture: the Cortex-M4F core handles real-time signal processing with hardware floating-point and SIMD instructions, while the Cortex-M0 co-processor (204 MHz) offloads peripheral management and system control tasks. Both cores share memory via AHB multilayer matrix and use independent debug interfaces (SWD/JTAG).

Its clock system includes three PLLs - one for CPU operation up to 204 MHz, one for USB, and one configurable as audio PLL - plus internal 12 MHz RC oscillator (±3 % accuracy) and external crystal support (1–25 MHz). Power management features four reduced-power modes and RTC domain with battery-backed registers.

Key Specifications

Pinout & Package

Package: TFBGA100 (SOT926-1), plastic thin fine-pitch ball grid array, 100 balls, 0.8 mm pitch, body size 9 mm × 9 mm × 0.7 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-core microcontroller applications.

Compared with LPC4333JET100, the LPC4312JET100 trades dual-bank flash and CAN for lower cost and smaller code footprint; versus LPC4322JET100, it adds QEI and motor control PWM - making it the minimal variant supporting encoder-based servo drives.

Availability

LPC4312JET100E is available at Aetrix Electronics and suitable for industrial motor control, smart metering, embedded audio gateways, and RFID reader designs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LPC4312JET100E 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 leader delivering secure, scalable solutions for automotive, industrial, IoT, and mobile applications.

The LPC43xx product line targets high-performance embedded control with dual-core asymmetry, emphasizing real-time determinism, peripheral flexibility, and industrial-grade reliability - specifically engineered for motor drives, energy infrastructure, and intelligent edge nodes.

FAQ

What is the maximum operating frequency of the LPC4312JET100E?

The LPC4312JET100E operates at a maximum CPU frequency of 204 MHz on both the ARM Cortex-M4F and Cortex-M0 cores. This performance level is achieved using the on-chip PLLs with an external crystal (1–25 MHz) or internal 12 MHz RC oscillator. The LPC4312JET100E achieves full 204 MHz operation under industrial temperature conditions (-40 °C to +105 °C) with proper power supply decoupling and thermal design.

Does the LPC4312JET100E support Ethernet or LCD interfaces?

No, the LPC4312JET100E does not include Ethernet MAC or LCD controller peripherals. These features are excluded in the LPC431x series per Table 2 of the datasheet. The LPC4312JET100E retains USB, ADC/DAC, SCTimer, QEI, and SD/MMC interfaces - making it suitable for control-centric applications where network display functionality is handled externally or omitted entirely.

How many GPIO pins are available on the LPC4312JET100E?

The LPC4312JET100E provides 49 GPIO pins, as confirmed in Table 2 of the datasheet. These are distributed across ports P0–P1 and PA–PF, with each pin supporting up to eight alternate functions via the System Configuration Unit (SCU). All 49 pins are accessible in the TFBGA100 package and support configurable pull-up/pull-down resistors, interrupt triggering, and DMA-capable access.

What USB capabilities does the LPC4312JET100E offer?

The LPC4312JET100E integrates one High-speed USB 2.0 Host/Device interface with on-chip full-speed PHY and ULPI interface for external high-speed PHY connection. It does not support USB OTG or a second USB port. The USB controller includes DMA support and ROM-resident USB stack test software, enabling rapid development of HID, CDC, or mass storage class devices without external transceivers in full-speed mode.

Is the LPC4312JET100E pin-compatible with other LPC43xx TFBGA100 variants?

Yes, the LPC4312JET100E shares identical TFBGA100 pinout and footprint with other JET100-suffixed LPC43xx parts (e.g., LPC4333JET100, LPC4322JET100). Pin assignments for power, clocks, reset, JTAG/SWD, and primary peripherals are consistent across the family. However, functional availability (e.g., Ethernet pins, LCD pins) differs per variant - unused pins retain GPIO or alternate functions as defined in the datasheet's pin description table.