NXP Semiconductors LPC55S16JBD64K

Overview

LPC55S16JBD64K from NXP Semiconductors is an Arm Cortex-M33 microcontroller with TrustZone security, 256 KB flash, 96 KB SRAM, PRINCE real-time flash encryption, CASPER crypto co-processor, and CAN FD interface - deployed in secure industrial gateways requiring firmware integrity, encrypted OTA updates, and deterministic fieldbus communication.

For engineers reviewing the LPC55S16JBD64K datasheet, LPC55S16JBD64K pinout, LPC55S16JBD64K application, or LPC55S16JBD64K equivalent, key selection criteria include its HTQFP64 package with 36 GPIOs, dual USB (FS + HS) support with crystal-less operation, 16-bit 2.0 Msamples/sec ADC with simultaneous differential conversion, and hardware-accelerated AES-256/SHA2/RSA via PUF and CASPER.

Technical Context

The LPC55S16JBD64K implements Arm TrustZone to isolate secure and non-secure execution environments, enabling secure boot with RSA-2048/4096 signature verification and DICE-compliant device identity composition. Its PRINCE module performs real-time AES-128 encryption/decryption of flash reads and writes, while CASPER accelerates ECC operations for key exchange and digital signatures.

It integrates two DMA controllers (23+10 channels), nine Flexcomm interfaces configurable as USART/SPI/I2C/I2S, SCTimer/PWM with 16 capture/match registers, and a 24-bit Multi-Rate Timer for precise periodic interrupts - all synchronized under a clock system featuring dual PLLs, FROs trimmed to ±1% (0–85°C), and 32.768 kHz RTC oscillator.

Key Specifications

Pinout & Package

HTQFP64 package with exposed thermal pad, 0.5 mm pitch, and 64 leads in low-profile quad flat configuration. Pin functions are software-selectable via IOCON registers; default reset state disables most pull-ups/pull-downs except on debug and boot pins (PIO0_2/5/11/12/13/14).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Arm Cortex-M33 microcontroller applications.

Compared with LPC55S26JBD64 and RA6M5GFP64A, the LPC55S16JBD64K delivers optimal balance of security depth (PRINCE/CASPER/PUF), compact footprint (HTQFP64), and deterministic real-time performance - making it ideal for resource-constrained secure edge nodes where flash encryption and ECC acceleration are non-negotiable.

Availability

LPC55S16JBD64K is available at Aetrix Electronics and suitable for industrial gateways, secure edge nodes, automotive diagnostic tools, and medical sensor hubs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for LPC55S16JBD64K 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in Arm-based microcontrollers and hardware security IP.

The LPC55S1x series targets secure embedded systems demanding certified boot, runtime isolation, and hardware-accelerated cryptography - designed specifically for industrial control, smart infrastructure, and safety-critical edge devices.

FAQ

What is the maximum CPU frequency supported by the LPC55S16JBD64K?

The LPC55S16JBD64K operates at up to 150 MHz using its Arm Cortex-M33 core. This frequency is achievable with either the internal 96 MHz FRO (trimmed to ±1% over 0–85°C) or external crystal/oscillator sources, and is sustained across the full −40 °C to +105 °C operating range. The LPC55S16JBD64K uses PLL0 or PLL1 to scale the clock without requiring high-frequency external crystals.

Does the LPC55S16JBD64K support crystal-less USB full-speed operation?

Yes, the LPC55S16JBD64K supports crystal-less USB full-speed device mode using its internal 48 MHz clock derived from the FRO, eliminating the need for an external 48 MHz crystal. This feature is implemented in hardware and validated per NXP Technical Note TN00065, reducing BOM cost and PCB area. The LPC55S16JBD64K does not support crystal-less high-speed USB.

How many GPIO pins are available on the LPC55S16JBD64K in the HTQFP64 package?

The LPC55S16JBD64K in HTQFP64 package provides 36 general-purpose I/O pins. This count is confirmed in Table 2 of the datasheet and reflects the physical pin allocation after accounting for power, ground, debug, USB, and crystal connections. All 36 GPIOs support secure configuration, interrupt triggering, and flexible peripheral multiplexing via IOCON registers.

What security features differentiate the LPC55S16JBD64K from standard Cortex-M33 MCUs?

The LPC55S16JBD64K integrates PRINCE (real-time flash encryption), CASPER (ECC acceleration), PUF (silicon fingerprint-based key generation), and DICE-compliant device identity - features absent in generic Cortex-M33 implementations. These enable certified secure boot, anti-rollback protection, and hardware-rooted trust without external secure elements. The LPC55S16JBD64K also includes TrustZone-enforced memory isolation and Code Watchdog for runtime flow integrity.

Can the LPC55S16JBD64K's ADC perform simultaneous conversions on multiple channels?

Yes, the LPC55S16JBD64K's 16-bit ADC supports simultaneous conversions on two channels belonging to the same differential pair (e.g., CH1A and CH1B), enabling precise phase-aligned sampling for motor control or power measurement. This capability is hardware-implemented and requires no CPU intervention, delivering true 2.0 Msamples/sec aggregate throughput with sub-microsecond inter-channel skew.