P89V52X2FN,112 Equivalent & Substitute Parts

Part Overview

The P89V52X2FN,112 is an 8051-based 8-bit microcontroller manufactured by NXP USA Inc., featuring 8KB FLASH program memory, 256 bytes of RAM, and 32 I/O pins in a 40-DIP package. This device operates at 40MHz with a supply voltage range of 2.7V to 5.5V and includes UART/USART connectivity and Power-On Reset (POR) functionality.

The P89V52X2FN,112 is classified as obsolete. Locating equivalent or substitute components is necessary for ongoing system maintenance, design updates, or when original inventory becomes unavailable. Substitute parts must maintain compatibility with the core 8051 architecture, matching pin count, package type, and critical electrical parameters.

Key Parameters

Parameter	P89V52X2FN,112
Core Processor	8051
Core Size	8-Bit
Speed	40MHz
Program Memory Size	8KB (8K x 8)
Program Memory Type	FLASH
RAM Size	256 x 8
Number of I/O	32
Voltage - Supply (Vcc/Vdd)	2.7V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	40-DIP (0.600", 15.24mm)
Mounting Type	Through Hole
Connectivity	UART/USART
Peripherals	POR

Substitute Part Grouping Explanation

Substitution eligibility for the P89V52X2FN,112 is determined by the following critical parameters:

Essential Compatibility Criteria:

8051 core processor architecture
40-DIP package with 32 I/O pins
Through-hole mounting type
FLASH program memory type
256 x 8 RAM size
UART/USART connectivity
Operating temperature range of -40°C to 85°C

Allowable Variations:

Program memory size (8KB or greater)
Operating speed (24MHz or greater, provided timing requirements are met)
Supply voltage range (must encompass or overlap with 2.7V ~ 5.5V)
Additional peripherals (WDT, SPI, EEPROM) do not disqualify substitution
Product status transition from obsolete to active

The three substitute parts listed below meet these criteria and are suitable for direct replacement in applications where the P89V52X2FN,112 is no longer available.

Parameter Comparison

Parameter	P89V52X2FN,112	AT89S52-24PU	AT89C55WD-24PU	AT89S8253-24PU
Manufacturer	NXP USA Inc.	Microchip Technology	Microchip Technology	Microchip Technology
Core Processor	8051	8051	8051	8051
Core Size	8-Bit	8-Bit	8-Bit	8-Bit
Speed	40MHz	24MHz	24MHz	24MHz
Program Memory Size	8KB (8K x 8)	8KB (8K x 8)	20KB (20K x 8)	12KB (12K x 8)
Program Memory Type	FLASH	FLASH	FLASH	FLASH
RAM Size	256 x 8	256 x 8	256 x 8	256 x 8
Number of I/O	32	32	32	32
Voltage - Supply (Vcc/Vdd)	2.7V ~ 5.5V	4V ~ 5.5V	4.5V ~ 5.5V	2.7V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	40-DIP (0.600", 15.24mm)	40-DIP (0.600", 15.24mm)	40-DIP (0.600", 15.24mm)	40-DIP (0.600", 15.24mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Connectivity	UART/USART	UART/USART	UART/USART	UART/USART, SPI
Peripherals	POR	WDT	WDT	POR, WDT
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

AT89S52-24PU is the closest functional equivalent to the P89V52X2FN,112, matching the 8KB FLASH program memory size exactly. This part is manufactured by Microchip Technology and maintains active product status, ensuring long-term availability. The AT89S52-24PU operates at 24MHz, which is lower than the original 40MHz specification; applications must accommodate this reduced speed. The supply voltage range of 4V to 5.5V is narrower than the original 2.7V to 5.5V specification. Both parts are ROHS3 compliant and rated for -40°C to 85°C operation.

AT89C55WD-24PU provides increased program memory capacity at 20KB, suitable for applications requiring additional code storage. This part operates at 24MHz with a supply voltage range of 4.5V to 5.5V. The narrower voltage range may require circuit design review for low-voltage applications.

AT89S8253-24PU offers 12KB of FLASH program memory with additional features including SPI connectivity, EEPROM (2K x 8), and Watchdog Timer (WDT) peripherals. This part maintains the original 2.7V to 5.5V supply voltage range, making it suitable for low-voltage applications. The AT89S8253-24PU operates at 24MHz and includes both POR and WDT functionality.

All three substitute parts are ROHS3 compliant, REACH unaffected, and rated for the same operating temperature range as the original device.

Frequently Asked Questions (FAQ)

Q: Can the AT89S52-24PU directly replace the P89V52X2FN,112 in existing designs?

A: The AT89S52-24PU is pin-compatible and functionally equivalent for the 8KB FLASH memory requirement. However, the reduced operating speed (24MHz versus 40MHz) must be evaluated against application timing requirements. The narrower supply voltage range (4V to 5.5V versus 2.7V to 5.5V) requires circuit review for systems operating below 4V.

Q: What is the primary difference between the three substitute options?

A: AT89S52-24PU matches the original 8KB memory size. AT89C55WD-24PU provides 20KB memory for code-intensive applications. AT89S8253-24PU offers 12KB memory with integrated EEPROM and SPI interface, maintaining the original 2.7V to 5.5V voltage range.

Q: Are all substitute parts available in the same 40-DIP package?

A: Yes. All substitute parts use the 40-DIP (0.600", 15.24mm) through-hole package, ensuring mechanical and electrical compatibility with existing PCB designs.

Q: What compliance certifications apply to these substitute parts?

A: All substitute parts are ROHS3 compliant, REACH unaffected, and rated for -40°C to 85°C operation, matching the original device specifications.

Q: Does the reduced operating speed of substitute parts affect software compatibility?

A: Software written for the P89V52X2FN,112 will execute on substitute parts at reduced speed. Applications with timing-critical functions must be re-evaluated to ensure the 24MHz clock speed meets system requirements.

Q: Which substitute part is recommended for low-voltage applications?

A: The AT89S8253-24PU maintains the original 2.7V to 5.5V supply voltage range and is recommended for systems operating below 4V.

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