Nuvoton M054LAN Equivalent & Substitute Parts

Part Overview

The Nuvoton M054LAN is a 32-bit ARM Cortex-M0 microcontroller featuring 16KB FLASH memory, 4KB RAM, and 40 I/O pins in a 48-LQFP package. Operating at 50MHz with a supply voltage range of 2.5V to 5.5V, this device integrates essential peripherals including PWM, watchdog timer, brown-out detection, and multiple communication interfaces (UART/USART, SPI, I2C, IrDA, EBI/EMI).

The M054LAN is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this microcontroller architecture.

Key Parameters

Parameter	M054LAN Specification
Core Processor	ARM Cortex-M0
Core Size	32-Bit Single-Core
Speed	50MHz
Program Memory Size	16KB (16K x 8) FLASH
RAM Size	4K x 8
Number of I/O	40
Voltage Supply (Vcc/Vdd)	2.5V ~ 5.5V
Data Converters	A/D 8x12b
Package / Case	48-LQFP
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Connectivity	EBI/EMI, I2C, IrDA, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, LVD, POR, PWM, WDT

Substitute Part Grouping Explanation

Substitution eligibility for the M054LAN is determined by strict equivalence across the following critical parameters:

Core processor architecture (ARM Cortex-M0)
Core size and bit width (32-Bit Single-Core)
Operating frequency (50MHz)
Program memory capacity (16KB FLASH)
RAM capacity (4K x 8)
I/O pin count (40)
Supply voltage range (2.5V ~ 5.5V)
Package type and pin configuration (48-LQFP)
Operating temperature range (-40°C ~ 85°C)
Data converter specifications (A/D 8x12b)

The M054LDN qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. Both devices share identical core architecture, memory configuration, I/O count, voltage specifications, and thermal operating range. The M054LDN maintains full compatibility with designs originally specified for the M054LAN.

Parameter Comparison

Parameter	M054LAN	M054LDN	Match
Core Processor	ARM Cortex-M0	ARM Cortex-M0	Yes
Core Size	32-Bit Single-Core	32-Bit Single-Core	Yes
Speed	50MHz	50MHz	Yes
Program Memory Size	16KB (16K x 8) FLASH	16KB (16K x 8) FLASH	Yes
RAM Size	4K x 8	4K x 8	Yes
Number of I/O	40	40	Yes
Voltage Supply (Vcc/Vdd)	2.5V ~ 5.5V	2.5V ~ 5.5V	Yes
Data Converters	A/D 8x12b	A/D 8x12b SAR	Yes
Package / Case	48-LQFP	48-LQFP (7x7)	Yes
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	Yes
Mounting Type	Surface Mount	Surface Mount	Yes
Connectivity	EBI/EMI, I2C, IrDA, SPI, UART/USART	EBI/EMI, I2C, IrDA, LINbus, SPI, UART/USART	Compatible
Peripherals	Brown-out Detect/Reset, LVD, POR, PWM, WDT	Brown-out Detect/Reset, LVR, POR, PWM, WDT	Compatible
Product Status	Obsolete	Active	Substitute Available

Engineering Selection Recommendations

The M054LDN is the qualified substitute for the obsolete M054LAN. Both devices are manufactured by Nuvoton Technology Corporation and share identical NuMicro M051 series architecture with matching electrical specifications and package configuration.

Selection of the M054LDN is supported by:

Identical core processor, memory, and I/O specifications
Matching voltage supply range and operating temperature specifications
Identical 48-LQFP package footprint and pin configuration
Active product status ensuring continued availability and supply chain support
Equivalent REACH compliance and ECCN classification (3A991A2)
Identical HTSUS classification (8542.31.0001)

The M054LDN provides direct functional replacement for the M054LAN in all applications where the original device was specified.

Frequently Asked Questions (FAQ)

Q: Can the M054LDN be used as a direct replacement for the M054LAN in existing designs?

A: Yes. The M054LDN matches all critical electrical and mechanical parameters of the M054LAN, including core architecture, memory configuration, I/O count, voltage specifications, operating temperature range, and 48-LQFP package footprint. No design modifications are required.

Q: What is the difference between the M054LAN and M054LDN?

A: The M054LAN is classified as obsolete, while the M054LDN is an active product. The M054LDN includes LINbus connectivity in addition to the standard interfaces present in the M054LAN. Both devices share identical core specifications and package configuration.

Q: Are there any compatibility concerns when substituting the M054LDN for the M054LAN?

A: No compatibility concerns exist. Both devices are pin-compatible, electrically equivalent, and operate within identical voltage and temperature ranges. The 48-LQFP package dimensions and pinout are identical.

Q: What is the supply voltage range for both devices?

A: Both the M054LAN and M054LDN operate with a supply voltage range of 2.5V to 5.5V, supporting applications across standard logic and embedded system voltage domains.

Q: Are both devices suitable for the same operating temperature range?

A: Yes. Both the M054LAN and M054LDN operate across the identical temperature range of -40°C to 85°C (TA), supporting industrial and commercial applications.

Q: What is the package configuration for these microcontrollers?

A: Both devices are supplied in a 48-LQFP (Low-Profile Quad Flat Package) with 7x7mm dimensions, suitable for surface mount assembly on standard PCB layouts.

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