LPC1768FET100Z Equivalent & Substitute Parts

Part Overview

The LPC1768FET100Z is an ARM Cortex-M3 based 32-bit microcontroller from NXP USA Inc., featuring 512KB FLASH memory, 64KB RAM, and 100MHz operation in a 100-TFBGA package. This device is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The LPC1768FET100Y serves as the direct manufacturer-recommended substitute, offering identical core functionality with active product status and improved availability.

Key Parameters

Parameter	Value
Core Processor	ARM Cortex-M3
Core Size	32-Bit Single-Core
Speed	100MHz
Program Memory Size	512KB (512K x 8) FLASH
RAM Size	64K x 8
Number of I/O	70
Voltage Supply (Vcc/Vdd)	2.4V ~ 3.6V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	100-TFBGA (9x9)
Mounting Type	Surface Mount
Series	LPC17xx

Substitute Part Grouping Explanation

Substitution between LPC1768FET100Z and LPC1768FET100Y is valid based on the following criteria:

Identical Electrical Parameters:

Core processor architecture (ARM Cortex-M3)
Memory configuration (512KB FLASH, 64KB RAM)
Operating frequency (100MHz)
I/O count (70 pins)
Supply voltage range (2.4V ~ 3.6V)
Operating temperature range (-40°C ~ 85°C)
Peripheral set (CANbus, Ethernet, I2C, IrDA, Microwire, SPI, SSI, UART/USART, USB OTG)
Data converter specifications (A/D 8x12b, D/A 1x10b)

Identical Mechanical Parameters:

Package type (100-TFBGA 9x9)
Mounting method (Surface Mount)
Base product number (LPC1768)

Compliance Alignment:

RoHS3 Compliant (both parts)
REACH Unaffected (both parts)

The substitution is manufacturer-recommended and reflects only the product status transition from obsolete to active, with no functional or physical differences affecting circuit design or PCB layout.

Parameter Comparison

Parameter	LPC1768FET100Z (Main)	LPC1768FET100Y (Substitute)
Manufacturer	NXP USA Inc.	NXP USA Inc.
Series	LPC17xx	LPC17xx
Core Processor	ARM Cortex-M3	ARM Cortex-M3
Core Size	32-Bit Single-Core	32-Bit Single-Core
Speed	100MHz	100MHz
Program Memory Size	512KB (512K x 8) FLASH	512KB (512K x 8) FLASH
RAM Size	64K x 8	64K x 8
Number of I/O	70	70
Voltage Supply (Vcc/Vdd)	2.4V ~ 3.6V	2.4V ~ 3.6V
Data Converters	A/D 8x12b; D/A 1x10b	A/D 8x12b; D/A 1x10b
Oscillator Type	Internal	Internal
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	100-TFBGA (9x9)	100-TFBGA (9x9)
Mounting Type	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Obsolete	Active
Moisture Sensitivity Level (MSL)	1 (Unlimited)	3 (168 Hours)

Engineering Selection Recommendations

The LPC1768FET100Y is the direct substitute for LPC1768FET100Z based on NXP manufacturer designation. Selection criteria are as follows:

Product Status: The LPC1768FET100Z is obsolete, while LPC1768FET100Y maintains active status with full manufacturer support and availability. For new designs or ongoing production, LPC1768FET100Y is the appropriate choice.

Compliance: Both parts meet RoHS3 and REACH requirements, ensuring regulatory compliance for industrial and commercial applications.

Moisture Sensitivity: LPC1768FET100Z carries MSL 1 (unlimited shelf life), while LPC1768FET100Y carries MSL 3 (168-hour limit). Storage and handling procedures must account for the MSL 3 classification of the substitute part.

Functional Equivalence: Electrical and mechanical parameters are identical, permitting direct substitution without circuit redesign or PCB layout modification.

Frequently Asked Questions (FAQ)

Q: Can LPC1768FET100Y be used as a direct replacement for LPC1768FET100Z in existing designs?

A: Yes. The parts are electrically and mechanically identical. No circuit redesign or PCB layout changes are required. The substitute maintains the same pin configuration, voltage requirements, memory specifications, and peripheral functionality.

Q: What is the difference between these two part numbers?

A: The primary difference is product status. LPC1768FET100Z is obsolete, while LPC1768FET100Y is active. Both parts share identical core specifications, including processor architecture, memory capacity, operating frequency, and package type. The MSL rating differs due to manufacturing date codes, but this does not affect electrical performance.

Q: Are there any compatibility concerns with the 100-TFBGA package?

A: No. Both parts use the identical 100-TFBGA (9x9) package with the same pin assignments, pitch, and mechanical dimensions. PCB footprints and assembly processes remain unchanged.

Q: What is the significance of the MSL 3 rating on the substitute part?

A: MSL 3 indicates a 168-hour moisture absorption limit. The component must be stored in controlled humidity conditions and used within the specified timeframe after opening. This is a handling and storage consideration, not a functional limitation.

Q: Is the LPC1768FET100Y available in higher volumes than the obsolete part?

A: Yes. The active status of LPC1768FET100Y ensures ongoing production and significantly higher inventory availability compared to the obsolete LPC1768FET100Z.

Q: Can firmware developed for LPC1768FET100Z run on LPC1768FET100Y without modification?

A: Yes. Identical processor architecture, memory configuration, and peripheral set ensure complete software compatibility. No firmware changes are required.

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