DS89C450-ENL Equivalent & Substitute Parts

Part Overview

The DS89C450-ENL is an 8051-based 8-bit microcontroller manufactured by Analog Devices Inc./Maxim Integrated. This device integrates 64KB of FLASH program memory, 1KB of RAM, and 32 I/O pins in a 44-TQFP surface mount package. The microcontroller operates at 33MHz with a supply voltage range of 4.5V to 5.5V and supports external oscillator configuration. The DS89C450-ENL is classified as obsolete, making identification of active equivalent parts essential for ongoing system support and new design implementations.

Substiute Parts

DS89C450-ENL

Analog Devices Inc./Maxim IntegratedIn Stock: 1616DS89C450-ENL Datasheet

Current PartRFQ

DS89C450-ENL+

Analog Devices Inc./Maxim IntegratedIn Stock: 2308DS89C450-ENL+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The DS89C450-ENL+ qualifies as a direct substitute based on identical electrical and mechanical specifications. Substitution criteria are determined by the following parameters:

• Core processor architecture (8051)
• Core size (8-Bit)
• Operating frequency (33MHz)
• Program memory capacity and type (64KB FLASH)
• RAM capacity (1K x 8)
• I/O pin count (32)
• Supply voltage range (4.5V ~ 5.5V)
• Operating temperature range (-40°C ~ 85°C)
• Package type and form factor (44-TQFP 10x10)
• Connectivity interfaces (EBI/EMI, SIO, UART/USART)
• Peripheral features (Power-Fail Reset, WDT)

The DS89C450-ENL+ maintains full compatibility across all functional and physical parameters, with the primary distinction being product status and packaging configuration.

Parameter Comparison

Engineering Selection Recommendations

The DS89C450-ENL+ is the direct functional equivalent of the DS89C450-ENL. Selection between these parts is determined by regulatory and compliance requirements rather than technical performance.

The DS89C450-ENL+ is classified as Active product status, ensuring continued availability and manufacturer support. This part carries ROHS3 compliance certification, meeting current environmental and hazardous substance restrictions. The improved Moisture Sensitivity Level (MSL 3 at 168 hours versus MSL 4 at 72 hours) provides extended handling and storage flexibility.

For applications requiring RoHS compliance or long-term component availability, the DS89C450-ENL+ is the appropriate selection. Both parts are electrically and mechanically identical, supporting direct substitution in existing designs without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can the DS89C450-ENL+ replace the DS89C450-ENL in existing designs?

A: Yes. The DS89C450-ENL+ is electrically and mechanically identical to the DS89C450-ENL across all functional parameters, including processor architecture, memory configuration, I/O count, voltage specifications, and operating temperature range. Direct substitution is supported without circuit redesign.

Q: What is the difference between these two part numbers?

A: The primary differences are product status, regulatory compliance, and packaging. The DS89C450-ENL is obsolete and RoHS non-compliant, while the DS89C450-ENL+ is active and ROHS3 compliant. The DS89C450-ENL+ also features improved moisture sensitivity characteristics (MSL 3 versus MSL 4).

Q: Are there any package or pinout differences?

A: No. Both parts use the identical 44-TQFP (10x10) surface mount package with 32 I/O pins. Pinout, pad layout, and mechanical dimensions are identical.

Q: Which part should be selected for new designs?

A: The DS89C450-ENL+ should be selected for new designs. This part is actively manufactured, carries current regulatory certifications, and provides improved handling characteristics. The DS89C450-ENL is obsolete and should be reserved for legacy system maintenance only.

Q: Are there any firmware or software compatibility considerations?

A: No. Both parts execute identical 8051 instruction sets and support the same development tools and firmware. Software developed for either part is fully compatible with the other.