DS89C450-ENG Equivalent & Substitute Parts

Part Overview

The DS89C450-ENG is an 8051-based 8-bit microcontroller manufactured by Analog Devices Inc./Maxim Integrated, featuring 64KB FLASH program memory, 1KB RAM, and 32 I/O pins in a 44-TQFP surface mount package. This device operates at 25MHz with a supply voltage range of 4.5V to 5.5V and includes integrated peripherals such as Power-Fail Reset and Watchdog Timer (WDT).

The DS89C450-ENG 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 identical electrical specifications and mechanical compatibility to ensure seamless integration into existing applications.

Substiute Parts

DS89C450-ENG

Analog Devices Inc./Maxim IntegratedIn Stock: 24631DS89C450-ENG Datasheet

Current PartRFQ

DS89C450-ENG+

Analog Devices Inc./Maxim IntegratedIn Stock: 1245DS89C450-ENG+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DS89C450-ENG are identified based on strict equivalence across all critical electrical and mechanical parameters. The substitution criteria are:

• Identical core processor architecture (8051)
• Matching core size (8-Bit)
• Identical clock speed (25MHz)
• Identical program memory capacity and type (64KB FLASH)
• Identical RAM size (1K x 8)
• Identical I/O pin count (32)
• Identical supply voltage range (4.5V ~ 5.5V)
• Identical operating temperature range (-40°C ~ 85°C)
• Identical package and pinout (44-TQFP 10x10)
• Identical connectivity interfaces (EBI/EMI, SIO, UART/USART)
• Identical integrated peripherals (Power-Fail Reset, WDT)

Only parts meeting all these criteria are classified as direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The DS89C450-ENG+ serves as the direct substitute for the DS89C450-ENG. Both parts are electrically and mechanically identical across all functional parameters. The primary distinction is product status and regulatory compliance.

The DS89C450-ENG is classified as obsolete, whereas the DS89C450-ENG+ maintains active product status. The DS89C450-ENG+ achieves ROHS3 compliance, whereas the original DS89C450-ENG is RoHS non-compliant. For applications requiring regulatory compliance with modern environmental standards, the DS89C450-ENG+ is the appropriate selection. Both parts share identical MSL ratings and REACH status.

Selection between these parts should be based on availability, regulatory requirements, and supply chain considerations rather than functional performance, as electrical and mechanical specifications are identical.

Frequently Asked Questions (FAQ)

Q: Are DS89C450-ENG and DS89C450-ENG+ pin-for-pin compatible?

A: Yes. Both parts use the 44-TQFP (10x10) package with identical pinout. No PCB redesign is required for substitution.

Q: What is the difference between DS89C450-ENG and DS89C450-ENG+?

A: The parts are functionally identical. The DS89C450-ENG+ is the active product variant with ROHS3 compliance, while the DS89C450-ENG is obsolete and RoHS non-compliant. Packaging differs (Tray for DS89C450-ENG+).

Q: Can I use DS89C450-ENG+ in place of DS89C450-ENG in existing designs?

A: Yes. All electrical specifications, memory configurations, I/O counts, operating ranges, and peripheral functions are identical. Direct substitution is supported without design modifications.

Q: Are there any supply voltage or temperature range differences?

A: No. Both parts operate at 4.5V to 5.5V supply voltage and -40°C to 85°C temperature range.

Q: What does the "+" designation indicate?

A: The "+" suffix indicates the active production variant with updated compliance certifications (ROHS3). The base part number DS89C450 remains the same.

Q: Are moisture sensitivity levels identical?

A: Yes. Both parts have MSL rating of 3 (168 Hours), requiring identical handling and storage conditions.

Q: Can I substitute these parts in high-reliability applications?

A: Substitution is based on electrical and mechanical equivalence. Application-specific reliability requirements should be evaluated independently of part number designation.