S908AB32AE2CFUE Equivalent & Substitute Parts

Part Overview

The S908AB32AE2CFUE is an 8-bit HC08 microcontroller IC manufactured by NXP USA Inc., featuring 32KB FLASH program memory, 1KB RAM, and 512 bytes EEPROM. This device is housed in a 64-QFP (14x14) surface mount package and operates at 8MHz with a supply voltage range of 4.5V to 5.5V. The part is currently marked as Not For New Designs, indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary for legacy system maintenance, repair operations, and inventory management where continued component availability is required.

Key Parameters

Parameter	Value
Core Processor	HC08
Core Size	8-Bit
Speed	8MHz
Program Memory Size	32KB (32K x 8) FLASH
RAM Size	1K x 8
EEPROM Size	512 x 8
Voltage - Supply (Vcc/Vdd)	4.5V ~ 5.5V
Package / Case	64-QFP (14x14)
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C (TA)
Data Converters	A/D 8x8b
Number of I/O	51
Peripherals	POR, PWM

Substitute Part Grouping Explanation

Substitution of the S908AB32AE2CFUE is determined by strict equivalence across the following critical parameters:

Core Architecture: HC08 processor family
Memory Configuration: 32KB FLASH, 1KB RAM, 512 bytes EEPROM
Operating Frequency: 8MHz
Supply Voltage Range: 4.5V ~ 5.5V
Package Format: 64-QFP (14x14) surface mount
I/O Count: 51 pins
Peripheral Set: POR, PWM functionality
Temperature Range: -40°C ~ 85°C

The identified substitute part S908AB32AH3CFUE maintains identical specifications across all core electrical and mechanical parameters, confirming parametric equivalence for direct replacement in existing designs.

Parameter Comparison

Parameter	S908AB32AE2CFUE (Main)	S908AB32AH3CFUE (Substitute)
Manufacturer	NXP USA Inc.	NXP Semiconductors
Core Processor	HC08	HC08
Core Size	8-Bit	8-Bit
Speed	8MHz	8MHz
Program Memory Size	32KB (32K x 8) FLASH	32KB (32K x 8) FLASH
RAM Size	1K x 8	1K x 8
EEPROM Size	512 x 8	512 x 8
Voltage - Supply (Vcc/Vdd)	4.5V ~ 5.5V	4.5V ~ 5.5V
Data Converters	A/D 8x8b	A/D 8x8b
Oscillator Type	Internal	External, Internal
Connectivity	SCI, SPI	I2C, SCI, SPI
Peripherals	POR, PWM	POR, PWM
Number of I/O	51	51
Package / Case	64-QFP (14x14)	64-QFP (14x14)
Mounting Type	Surface Mount	Surface Mount
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Product Status	Not For New Designs	Obsolete
RoHS Status	ROHS3 Compliant	RoHS non-compliant
REACH Status	REACH Unaffected	Vendor Undefined

Engineering Selection Recommendations

The S908AB32AH3CFUE serves as a parametric equivalent to the S908AB32AE2CFUE based on identical core electrical specifications and package format. Both devices share the same HC08 architecture, memory configuration, operating frequency, and supply voltage requirements.

Selection between these parts must account for compliance and regulatory status differences. The main part S908AB32AE2CFUE carries ROHS3 compliance and REACH Unaffected status, while the substitute S908AB32AH3CFUE is marked as RoHS non-compliant with Vendor Undefined REACH status. Both parts are end-of-life, with the main part designated Not For New Designs and the substitute marked Obsolete.

The substitute part offers expanded oscillator flexibility (External and Internal options versus Internal only) and additional I2C connectivity alongside the standard SCI and SPI interfaces present in the main part. These enhancements do not affect substitution eligibility but may provide functional advantages in legacy system applications.

Frequently Asked Questions (FAQ)

Q: Can S908AB32AH3CFUE directly replace S908AB32AE2CFUE in existing designs?

A: Yes. Both parts maintain identical core processor architecture, memory capacity, operating frequency, supply voltage range, and 64-QFP package format. Pin-to-pin compatibility is confirmed across all 51 I/O connections.

Q: What are the key differences between these parts?

A: The substitute part includes I2C connectivity in addition to SCI and SPI, and supports both external and internal oscillator configurations compared to internal oscillator only in the main part. Compliance certifications differ: the main part is ROHS3 compliant with REACH Unaffected status, while the substitute is RoHS non-compliant with Vendor Undefined REACH status.

Q: Are there any connectivity or peripheral differences that affect substitution?

A: The substitute part provides additional connectivity options (I2C) and oscillator flexibility. The core peripheral set (POR, PWM) and data converter specifications (A/D 8x8b) remain identical. These differences do not prevent substitution but may enable additional functionality in legacy applications.

Q: What is the significance of the product status designations?

A: Both parts are end-of-life. The main part is marked Not For New Designs, indicating it is available but not recommended for new development. The substitute is marked Obsolete, indicating discontinued production. Both statuses reflect the legacy nature of the HC08 architecture in current component markets.

Q: How do compliance differences impact part selection?

A: The main part carries ROHS3 compliance certification suitable for applications with environmental compliance requirements. The substitute part's RoHS non-compliant status and Vendor Undefined REACH status require evaluation against specific application regulatory requirements before selection.

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