P80C32UBAA,518 Equivalent & Substitute Parts

Part Overview

The P80C32UBAA,518 is an 8-bit microcontroller from NXP USA Inc. based on the 8051 core architecture, designed for embedded applications requiring ROMless configuration. This device operates at 33MHz with a 44-PLCC package and supports a supply voltage range of 2.7V to 5.5V. The product is currently obsolete, making equivalent substitute parts necessary for ongoing system support, maintenance, and new designs requiring compatible 8051-based microcontroller solutions.

Key Parameters

Parameter	Value
Core Processor	8051
Core Size	8-Bit
Speed	33MHz
Program Memory Type	ROMless
RAM Size	256 x 8
Voltage Supply (Vcc/Vdd)	2.7V ~ 5.5V
Number of I/O	32
Package / Case	44-LCC (J-Lead)
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitute parts for the P80C32UBAA,518 are qualified based on the following critical parameters:

Core Architecture: 8051-compatible processor ensuring instruction set compatibility
Core Size: 8-Bit processing capability
Program Memory Type: ROMless configuration matching the original design
Package Type: 44-LCC (J-Lead) surface mount package for mechanical and electrical compatibility
Voltage Supply Range: 2.7V ~ 5.5V operational envelope
Number of I/O: 32 I/O pins for functional equivalence
Operating Temperature Range: -40°C ~ 85°C (TA)

The substitute parts AT80C51RD2-SLRUM and AT80C51RD2-SLSUM from Microchip Technology meet all these criteria. Both devices maintain full compatibility with the original part's electrical and mechanical specifications while offering enhanced features and active product status.

Parameter Comparison

Parameter	P80C32UBAA,518 (NXP)	AT80C51RD2-SLRUM (Microchip)	AT80C51RD2-SLSUM (Microchip)
Core Processor	8051	80C51	80C51
Core Size	8-Bit	8-Bit	8-Bit
Speed	33MHz	40MHz	40MHz
Program Memory Type	ROMless	ROMless	ROMless
RAM Size	256 x 8	1K x 8	1K x 8
Voltage Supply (Vcc/Vdd)	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V
Number of I/O	32	32	32
Connectivity	UART/USART	UART/USART	UART/USART
Peripherals	POR	POR, PWM, WDT	POR, PWM, WDT
Package / Case	44-LCC (J-Lead)	44-LCC (J-Lead)	44-LCC (J-Lead)
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both AT80C51RD2-SLRUM and AT80C51RD2-SLSUM are direct functional equivalents to the P80C32UBAA,518. Selection between these two substitute parts is determined by packaging requirements:

AT80C51RD2-SLRUM is supplied in Cut Tape (CT) & Digi-Reel® packaging, suitable for automated assembly processes and high-volume production environments.

AT80C51RD2-SLSUM is supplied in Tube packaging, appropriate for manual assembly, prototyping, and lower-volume applications.

Both parts are manufactured by Microchip Technology and maintain active product status, ensuring long-term availability and supply chain stability. The substitute parts offer enhanced peripheral integration (PWM and WDT) compared to the original device while maintaining full electrical and mechanical compatibility. All parts comply with ROHS3 and REACH regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Are the AT80C51RD2 parts pin-compatible with the P80C32UBAA,518?

A: Yes. Both substitute parts use the 44-LCC (J-Lead) package with identical pin count and I/O configuration, ensuring direct mechanical and electrical compatibility.

Q: What is the difference between AT80C51RD2-SLRUM and AT80C51RD2-SLSUM?

A: The primary difference is packaging. AT80C51RD2-SLRUM is supplied in Cut Tape & Digi-Reel® format for automated pick-and-place assembly, while AT80C51RD2-SLSUM is supplied in Tube format for manual handling and lower-volume applications. Electrical specifications are identical.

Q: Can the substitute parts operate at the same voltage levels as the original P80C32UBAA,518?

A: Yes. Both AT80C51RD2 variants support the same supply voltage range of 2.7V to 5.5V, ensuring compatibility with existing power supply designs.

Q: Do the substitute parts support the same operating temperature range?

A: Yes. Both AT80C51RD2 parts operate across the same temperature range of -40°C to 85°C (TA), maintaining thermal compatibility with the original design.

Q: What additional features do the substitute parts provide?

A: The AT80C51RD2 devices include PWM (Pulse Width Modulation) and WDT (Watchdog Timer) peripherals in addition to the POR (Power-On Reset) found in the original part. These enhancements provide additional functionality without affecting core compatibility.

Q: Are the substitute parts RoHS and REACH compliant?

A: Yes. Both AT80C51RD2-SLRUM and AT80C51RD2-SLSUM are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory standards.

Q: Why is the P80C32UBAA,518 listed as obsolete?

A: The P80C32UBAA,518 has been discontinued by NXP USA Inc. The AT80C51RD2 series from Microchip Technology provides equivalent functionality with active product status and ongoing manufacturer support.

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