DS80C320-MNL Equivalent & Substitute Parts

Part Overview

The DS80C320-MNL is an 8051-based 8-bit microcontroller IC manufactured by Analog Devices Inc./Maxim Integrated. This ROMless device operates at 33MHz with 256 x 8 bytes of RAM and includes integrated peripherals such as Power-Fail Reset and Watchdog Timer (WDT). The part is mounted in a 40-DIP through-hole package and operates across the industrial temperature range of -40°C to 85°C.

The DS80C320-MNL is classified as obsolete. Locating equivalent or substitute parts is necessary to support legacy system maintenance, board repairs, and production continuity for applications still utilizing this microcontroller architecture.

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)	4.5V ~ 5.5V
Number of I/O	32
Connectivity	EBI/EMI, SIO, UART/USART
Peripherals	Power-Fail Reset, WDT
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Through Hole
Package / Case	40-DIP (0.600", 15.24mm)
Oscillator Type	External

Substitute Part Grouping Explanation

Substitution of the DS80C320-MNL is determined by strict equivalence across the following critical parameters:

Core Architecture: 8051-based processor
Memory Configuration: ROMless design with 256 x 8 RAM
Clock Speed: 33MHz operation
Electrical Specifications: 4.5V to 5.5V supply voltage
I/O Count: 32 I/O lines
Peripheral Set: Power-Fail Reset and Watchdog Timer
Package Form Factor: 40-DIP through-hole mounting
Temperature Range: -40°C to 85°C

The DS80C320-MNL+ is identified as a direct substitute based on identical electrical, functional, and mechanical specifications. The primary distinction is packaging format and product status.

Parameter Comparison

Parameter	DS80C320-MNL	DS80C320-MNL+
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Core Processor	8051	8051
Core Size	8-Bit	8-Bit
Speed	33MHz	33MHz
Program Memory Type	ROMless	ROMless
RAM Size	256 x 8	256 x 8
Voltage Supply (Vcc/Vdd)	4.5V ~ 5.5V	4.5V ~ 5.5V
Number of I/O	32	32
Connectivity	EBI/EMI, SIO, UART/USART	EBI/EMI, SIO, UART/USART
Peripherals	Power-Fail Reset, WDT	Power-Fail Reset, WDT
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Through Hole	Through Hole
Package / Case	40-DIP (0.600", 15.24mm)	40-DIP (0.600", 15.24mm)
Oscillator Type	External	External
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Packaging Format	Bulk	Tube

Engineering Selection Recommendations

The DS80C320-MNL+ is the direct functional equivalent of the DS80C320-MNL. Both parts share identical electrical specifications, memory architecture, I/O configuration, and peripheral functionality. Selection between these parts is determined by compliance and availability requirements:

DS80C320-MNL+ is the preferred selection for new designs and applications requiring RoHS3 compliance. This part carries Active product status, ensuring continued availability and supply chain support. The tube packaging format provides standard handling and storage for production environments.

DS80C320-MNL remains suitable for legacy system repairs and maintenance where RoHS compliance is not mandated and existing inventory is available. The Obsolete status indicates limited future availability.

Both parts are electrically and mechanically interchangeable within the same PCB footprint and application circuit.

Frequently Asked Questions (FAQ)

Q: Are the DS80C320-MNL and DS80C320-MNL+ pin-for-pin compatible?

A: Yes. Both parts use the 40-DIP package with identical pin assignments, voltage levels, and signal definitions. Direct socket substitution is possible without circuit modification.

Q: What is the difference between the DS80C320-MNL and DS80C320-MNL+?

A: The primary differences are product status, RoHS compliance, and packaging format. The DS80C320-MNL+ is Active and RoHS3 compliant, supplied in tube packaging. The DS80C320-MNL is Obsolete and RoHS non-compliant, supplied in bulk. Electrical and functional specifications are identical.

Q: Can I use the DS80C320-MNL+ as a replacement for the DS80C320-MNL in existing applications?

A: Yes. The DS80C320-MNL+ is a direct substitute with identical electrical performance, memory configuration, I/O count, and peripheral functionality. No circuit redesign is required.

Q: Does the RoHS3 compliance of the DS80C320-MNL+ affect its electrical performance?

A: No. RoHS3 compliance relates to material composition and environmental standards, not electrical or functional performance. Both parts operate identically within the specified parameters.

Q: What packaging considerations apply to these parts?

A: The DS80C320-MNL is supplied in bulk packaging, while the DS80C320-MNL+ is supplied in tube packaging. Both are through-hole mounted 40-DIP devices with identical footprints. Tube packaging provides improved handling and traceability for production environments.

Q: Are there any temperature or voltage rating differences between these parts?

A: No. Both parts operate across -40°C to 85°C and require 4.5V to 5.5V supply voltage. Operating specifications are identical.

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