NXP Semiconductors LPC5506JHI48J

Overview

LPC5506JHI48J from NXP Semiconductors is a 32-bit ARM Cortex-M33 microcontroller designed for secure embedded control applications. It operates at up to 96 MHz, integrates 256 KB flash and 96 KB SRAM, includes PRINCE real-time flash encryption, CASPER crypto acceleration, and supports CAN 2.0 (not CAN FD). It targets industrial IoT edge nodes requiring tamper-resistant firmware and analog sensing.

For engineers reviewing the LPC5506JHI48J datasheet, LPC5506JHI48J pinout, LPC5506JHI48J application, or LPC5506JHI48J equivalent, key selection criteria include its HVQFN48 package with 30 GPIOs, 7-channel 16-bit ADC at 2.0 Msamples/sec, TrustZone®-enabled security architecture without PUF or SHA-AES hardware, and absence of CAN FD support compared to LPC55S0x variants.

Technical Context

The LPC5506JHI48J implements ARMv8-M architecture with TrustZone® for hardware-enforced memory isolation but excludes PUF, HASH-AES, and CASPER co-processor features found in LPC55S0x variants. Its security model relies on software-managed cryptographic operations and PRINCE-based flash encryption only.

It uses a dual-bus AHB matrix connecting Cortex-M33 core, DMA controllers (DMA0/DMA1), Flexcomm interfaces (0–7), SCTimer/PWM, PLU, and analog peripherals. Clocking supports FRO 96 MHz ±1% (0–85°C), 32 kHz RTC oscillator, and PLL-based CPU scaling - all managed via dedicated system control registers.

Key Specifications

Pinout & Package

HVQFN48 package with 48 terminals, 7 × 7 mm body, 0.4 mm pitch, and exposed thermal pad connected to VSS. Pin count and layout match NXP SOT619-28 specification.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC55S06JHI48, the LPC5506JHI48J omits hardware crypto engines but retains identical CPU performance, memory, and analog capabilities - making it optimal for non-crypto-intensive secure control. Against LPC5504JHI48, it delivers 128 KB more flash and 16 KB more SRAM for complex algorithm implementation without changing PCB layout.

Availability

LPC5506JHI48J is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, building automation sensor hubs, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.

Supply support for LPC5506JHI48J 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 specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with leadership in ARM-based microcontrollers and RF technologies.

The LPC5500 series targets cost-optimized, security-aware embedded applications where hardware crypto acceleration is optional - emphasizing deterministic real-time control, analog integration, and PRINCE-based firmware protection.

FAQ

What is the maximum operating frequency of the LPC5506JHI48J?

The LPC5506JHI48J operates at a maximum CPU frequency of 96 MHz using its internal 96 MHz Free Running Oscillator (FRO), trimmed to ±1% accuracy across 0 °C to 85 °C. This frequency is achievable without external crystals, though PLL-based scaling from other clock sources (e.g., 32 MHz XTAL) is also supported for system-level clock tree flexibility. The LPC5506JHI48J maintains this performance within its specified −40 °C to +105 °C industrial temperature range.

Does the LPC5506JHI48J support CAN FD or only classical CAN?

The LPC5506JHI48J supports only CAN 2.0 (Classical CAN) - it does not include the CAN FD module present in LPC55S0x variants. Its CAN controller complies with ISO 11898-1:2015 and supports bit rates up to 1 Mbps, message filtering, and programmable time quanta. For CAN FD applications requiring higher data rates and extended payload length, engineers must select the LPC55S06JHI48 or equivalent S-series variant. The LPC5506JHI48J datasheet explicitly lists "CAN2.0" under ordering options, confirming this limitation.

How many ADC channels are available on the LPC5506JHI48J in HVQFN48 package?

The LPC5506JHI48J provides 7 single-ended ADC input channels in the HVQFN48 package, corresponding to ADC0_0 through ADC0_6 and ADC0_9. This is confirmed in Table 2 of the datasheet, which specifies "7" under the ADC Channels column for all HVQFN48 variants including LPC5506JHI48. While the full LPC55S0x/LPC550x family supports up to 9 channels in HTQFP64 packages, pin count constraints reduce usable ADC inputs in the 48-pin variant. Each channel supports 16-bit resolution and sampling rates up to 2.0 Msamples/sec.

What security features are included in the LPC5506JHI48J?

The LPC5506JHI48J includes PRINCE real-time flash encryption/decryption and TrustZone®-enabled memory isolation, but excludes PUF, HASH-AES, and CASPER crypto co-processor hardware found in LPC55S0x devices. Secure boot is supported via ROM bootloader with RSASSA-PKCS1-v1_5 signature verification using RSA-2048/4096 keys and x.509 certificate validation. The LPC5506JHI48J relies on software-implemented cryptographic primitives for runtime operations, while PRINCE ensures firmware confidentiality during storage and execution.

What is the package type and thermal pad requirement for LPC5506JHI48J?

The LPC5506JHI48J uses the HVQFN48 package (SOT619-28), measuring 7 × 7 × 0.85 mm with 0.4 mm pitch and an exposed thermal pad. Per NXP documentation, this pad must be soldered to a PCB copper plane connected to VSS for effective thermal dissipation and electrical stability. The datasheet specifies that failure to connect the exposed pad may result in degraded thermal performance and potential reliability issues under sustained 96 MHz operation. Layout guidelines recommend a minimum 5 × 5 mm thermal pad with 4–9 vias to inner ground planes.