PIC24F08KM102-E/SS Equivalent & Substitute Parts

Part Overview

The PIC24F08KM102-E/SS is a 16-bit microcontroller from Microchip Technology's PIC® XLP™ 24F series, featuring 8KB of FLASH program memory, 1KB of RAM, and 512 bytes of EEPROM. This device integrates multiple communication interfaces including I2C, IrDA, LINbus, SPI, and UART/USART, along with essential peripherals such as PWM, watchdog timer, and brown-out detection. The part is currently classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Core Processor	PIC
Core Size	16-Bit
Speed	32MHz
Program Memory Size	8KB (2.75K x 24)
Program Memory Type	FLASH
RAM Size	1K x 8
EEPROM Size	512 x 8
Voltage Supply (Vcc/Vdd)	1.8V ~ 3.6V
Number of I/O	24
Data Converters	A/D 19x10b/12b
Connectivity	I2C, IrDA, LINbus, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, LVD, POR, PWM, WDT
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 125°C (TA)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the PIC24F08KM102-E/SS is determined by strict equivalence across core functional and electrical parameters. The primary substitute, PIC24F08KM102-I/SO, maintains identical specifications for processor architecture, core size, clock speed, memory configuration (8KB FLASH, 1KB RAM, 512 bytes EEPROM), I/O count, connectivity interfaces, and peripheral set. Both parts share the same base product number (PIC24F08KM102), confirming functional equivalence at the silicon level.

The key differentiator between these parts is packaging format: the main part uses 28-SSOP (0.209", 5.30mm width) while the substitute uses 28-SOIC (0.295", 7.50mm width). Both are surface-mount packages with identical pin counts and electrical characteristics. The operating temperature range differs slightly, with the main part rated to 125°C and the substitute to 85°C. Both maintain ROHS3 compliance, unlimited moisture sensitivity rating, and identical supply voltage specifications.

Parameter Comparison

Parameter	PIC24F08KM102-E/SS (Main)	PIC24F08KM102-I/SO (Substitute)
Manufacturer	Microchip Technology	Microchip Technology
Series	PIC® XLP™ 24F	PIC® XLP™ 24F
Core Processor	PIC	PIC
Core Size	16-Bit	16-Bit
Speed	32MHz	32MHz
Program Memory Size	8KB (2.75K x 24)	8KB (2.75K x 24)
Program Memory Type	FLASH	FLASH
RAM Size	1K x 8	1K x 8
EEPROM Size	512 x 8	512 x 8
Voltage Supply (Vcc/Vdd)	1.8V ~ 3.6V	1.8V ~ 3.6V
Number of I/O	24	24
Data Converters	A/D 19x10b/12b	A/D 19x10b/12b
Connectivity	I2C, IrDA, LINbus, SPI, UART/USART	I2C, IrDA, LINbus, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, LVD, POR, PWM, WDT	Brown-out Detect/Reset, LVD, POR, PWM, WDT
Mounting Type	Surface Mount	Surface Mount
Supplier Device Package	28-SSOP	28-SOIC
Package / Case	28-SSOP (0.209", 5.30mm Width)	28-SOIC (0.295", 7.50mm Width)
Operating Temperature	-40°C ~ 125°C (TA)	-40°C ~ 85°C (TA)
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)
ECCN	3A991A2	3A991A2
HTSUS	8542.31.0001	8542.31.0001

Engineering Selection Recommendations

The PIC24F08KM102-I/SO is the direct functional equivalent for the obsolete PIC24F08KM102-E/SS. Both parts are ROHS3 compliant and share identical regulatory classifications (ECCN 3A991A2, HTSUS 8542.31.0001). The substitute part carries active product status, ensuring ongoing availability and manufacturing support from Microchip Technology.

Selection between these parts depends on PCB layout constraints. The 28-SSOP package (main part) provides a narrower footprint at 5.30mm width, while the 28-SOIC package (substitute) measures 7.50mm width. Both packages accommodate identical electrical functionality and pin assignments. The operating temperature specification difference (125°C vs. 85°C maximum) should be evaluated against application requirements; designs operating within the -40°C to 85°C range are compatible with both variants.

Frequently Asked Questions (FAQ)

Q: Can PIC24F08KM102-I/SO directly replace PIC24F08KM102-E/SS in existing designs?

A: Electrical and functional replacement is direct. Pin assignments, memory configuration, and peripheral functionality are identical. PCB layout modification is required due to package format differences (28-SSOP vs. 28-SOIC). Designs operating within -40°C to 85°C temperature range experience no functional limitations.

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

A: The parts differ in packaging format and maximum operating temperature. PIC24F08KM102-E/SS uses 28-SSOP (5.30mm width) with 125°C rating; PIC24F08KM102-I/SO uses 28-SOIC (7.50mm width) with 85°C rating. All silicon-level specifications are identical.

Q: Are both parts RoHS compliant?

A: Both parts are ROHS3 compliant with identical regulatory status. Moisture sensitivity level is 1 (unlimited) for both variants.

Q: Why is the main part listed as obsolete?

A: PIC24F08KM102-E/SS is classified as obsolete by Microchip Technology. The functionally equivalent PIC24F08KM102-I/SO maintains active product status and is the recommended selection for new designs and production continuity.

Q: Do these parts require different PCB footprints?

A: Yes. The 28-SSOP package requires a different footprint than the 28-SOIC package. Footprint conversion is necessary for board redesign. Pin count and electrical assignments remain identical between packages.

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