NXP Semiconductors LPC1313FHN33,551

Overview

LPC1313FHN33,551 from NXP Semiconductors is a 32-bit ARM Cortex-M3 microcontroller in HVQFN33 package, operating up to 72 MHz with 32 kB flash, 8 kB SRAM, one UART, one Fast-mode Plus I²C-bus interface (1 Mbit/s), four general-purpose timers, and 33 GPIO pins. It targets low-power embedded control in metering, lighting, and alarm systems.

For engineers reviewing the LPC1313FHN33,551 datasheet, LPC1313FHN33,551 pinout, LPC1313FHN33,551 application, or LPC1313FHN33,551 equivalent, key selection criteria include its 33-pin HVQFN thermal-enhanced package, absence of USB peripheral, support for 10-bit ADC across 8 channels, and compatibility with ISP/IAP programming via UART.

Technical Context

The LPC1313FHN33,551 implements the ARM Cortex-M3 core with Harvard architecture, 3-stage pipeline, and integrated NVIC for deterministic interrupt handling. It uses separate instruction and data buses with an internal prefetch unit supporting speculative branching.

Its peripheral set includes a single SSP controller, UART with RS-485/EIA-485 support and fractional baud rate generation, and a programmable Watchdog Timer (WDT) - but excludes USB, second SSP, and Windowed Watchdog Timer (WWDT), which are only present in /01 variants or LQFP48 packages.

Key Specifications

Pinout & Package

HVQFN33 package: plastic thermal-enhanced very thin quad flat package, no leads, 33 terminals, body size 7 × 7 × 0.85 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1343FHN33, the LPC1313FHN33,551 omits USB hardware - reducing die area, power, and EMI sensitivity - while retaining identical timer, ADC, and I²C capabilities. Against LPC1114FHN33, it delivers higher interrupt responsiveness, deterministic latency, and richer peripheral integration at modest cost premium.

Availability

LPC1313FHN33,551 is available at Aetrix Electronics and suitable for eMetering, lighting control, and alarm systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for LPC1313FHN33,551 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 LPC1300 series, including LPC1313FHN33,551, was designed for cost-effective, low-power 32-bit embedded control in resource-constrained applications such as utility metering and smart appliances.

FAQ

Does the LPC1313FHN33,551 support USB functionality?

No, the LPC1313FHN33,551 does not include a USB controller or PHY. USB device capability is exclusive to the LPC1342/43 variants. The LPC1313FHN33,551 relies on UART, I²C, or SSP for host communication. This omission reduces silicon area, power consumption, and EMI concerns - making it ideal for non-USB applications like standalone metering or lighting nodes where UART-based firmware updates suffice.

What is the maximum operating frequency of the LPC1313FHN33,551?

The LPC1313FHN33,551 operates at a maximum CPU frequency of 72 MHz. This is achieved using the system PLL, which can be driven by either the internal 12 MHz RC oscillator (trimmed to ±1 % accuracy) or an external crystal (1–25 MHz). At 72 MHz, the ARM Cortex-M3 core delivers 1.25 DMIPS/MHz performance, enabling fast signal processing and real-time control loops in applications such as motor commutation or sensor fusion.

How many ADC channels does the LPC1313FHN33,551 support, and what is their resolution?

The LPC1313FHN33,551 integrates a 10-bit successive approximation ADC with 8 input channels (AD0–AD7), multiplexed across GPIO pins PIO0_11, PIO1_0–PIO1_3, and PIO1_4–PIO1_11. Each channel supports programmable sampling time and burst mode operation. The ADC uses the VDD rail as reference, delivering effective resolution up to 9.5 bits under typical noise conditions - sufficient for precision temperature monitoring, light sensing, and power supply voltage supervision in white goods and alarm panels.

Is the LPC1313FHN33,551 pin-compatible with other members of the LPC1300 family in HVQFN33 package?

Yes, the LPC1313FHN33,551 shares identical pinout and package dimensions (HVQFN33, 7 × 7 × 0.85 mm) with LPC1311FHN33, LPC1342FHN33, and LPC1343FHN33. All share the same GPIO mapping, peripheral pin assignments, and power/ground pin locations. However, functional differences exist: USB pins (USB_DM/DP) are no-connect on LPC1313FHN33,551; some ADC and timer functions differ across variants. PCBs designed for any HVQFN33 variant can accommodate LPC1313FHN33,551 without layout change.

What debug interfaces are supported by the LPC1313FHN33,551?

The LPC1313FHN33,551 supports Serial Wire Debug (SWD) using SWDIO (PIO1_3) and SWCLK (PIO0_10), plus Serial Wire Trace (SWO) on PIO0_9 for real-time instruction trace. It does not support JTAG. SWD provides full read/write memory access, breakpoint setting, and register inspection with only two pins - minimizing PCB routing complexity and enabling in-circuit debugging even in space-constrained designs. The on-chip bootloader also supports UART-based ISP for production programming.