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DS89C430-ENG Equivalent & Substitute Parts
Part Overview
The DS89C430-ENG is an 8051-based 8-bit microcontroller manufactured by Analog Devices Inc./Maxim Integrated, featuring 16KB 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 functionality.
The DS89C430-ENG is classified as obsolete. Locating equivalent or substitute components is necessary for ongoing system maintenance, design updates, or when original inventory becomes unavailable. Direct substitutes maintain identical electrical and mechanical specifications while offering improved availability or updated compliance certifications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Core Processor | 8051 |
| Core Size | 8-Bit |
| Speed | 25MHz |
| Program Memory Size | 16KB (16K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 1K x 8 |
| Number of I/O | 32 |
| Voltage Supply (Vcc/Vdd) | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | 44-TQFP (10x10) |
| Mounting Type | Surface Mount |
| Connectivity | EBI/EMI, SIO, UART/USART |
| Peripherals | Power-Fail Reset, WDT |
Substitute Part Grouping Explanation
Substitution of the DS89C430-ENG is determined by strict equivalence across the following critical parameters:
- Core Architecture: 8051 processor family
- Memory Configuration: 16KB FLASH program memory and 1KB RAM
- Clock Speed: 25MHz operation
- I/O Count: 32 I/O pins
- Package: 44-TQFP (10x10) surface mount
- Voltage Range: 4.5V to 5.5V supply
- Temperature Range: -40°C to 85°C operating
- Connectivity & Peripherals: EBI/EMI, SIO, UART/USART, Power-Fail Reset, WDT
The DS89C430-ENG+ qualifies as a direct substitute, maintaining identical electrical specifications and package configuration while differing only in product status and compliance certifications.
Parameter Comparison
| Parameter | DS89C430-ENG | DS89C430-ENG+ |
|---|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated |
| Core Processor | 8051 | 8051 |
| Core Size | 8-Bit | 8-Bit |
| Speed | 25MHz | 25MHz |
| Program Memory Size | 16KB (16K x 8) | 16KB (16K x 8) |
| Program Memory Type | FLASH | FLASH |
| RAM Size | 1K x 8 | 1K x 8 |
| Number of I/O | 32 | 32 |
| Voltage Supply (Vcc/Vdd) | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Package / Case | 44-TQFP (10x10) | 44-TQFP (10x10) |
| Mounting Type | Surface Mount | Surface Mount |
| Connectivity | EBI/EMI, SIO, UART/USART | EBI/EMI, SIO, UART/USART |
| Peripherals | Power-Fail Reset, WDT | Power-Fail Reset, WDT |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) | 3 (168 Hours) |
| REACH Status | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
The DS89C430-ENG+ is the direct functional equivalent of the DS89C430-ENG. Both devices share identical electrical specifications, memory configuration, I/O architecture, and package form factor. Selection between these parts should be based on the following factors:
DS89C430-ENG: Use only when legacy component specifications are explicitly required or when existing inventory must be maintained for continuity.
DS89C430-ENG+: Preferred for new designs and ongoing production. This variant maintains active product status with the manufacturer and meets ROHS3 compliance requirements, making it suitable for applications subject to environmental and regulatory standards. The tray packaging format supports standard manufacturing workflows.
Both parts are electrically and mechanically interchangeable within the specified operating parameters.
Frequently Asked Questions (FAQ)
Q: Are DS89C430-ENG and DS89C430-ENG+ pin-for-pin compatible?
A: Yes. Both devices use the 44-TQFP (10x10) package with identical pin assignments, voltage requirements, and I/O configurations. No PCB layout modifications are required for substitution.
Q: What is the difference between these two part numbers?
A: The DS89C430-ENG+ is the active production variant with ROHS3 compliance certification. The DS89C430-ENG is classified as obsolete. Electrical and mechanical specifications are identical.
Q: Can I use DS89C430-ENG+ in place of DS89C430-ENG in existing designs?
A: Yes. The DS89C430-ENG+ is a direct substitute with no design changes required. It operates within the same voltage range (4.5V to 5.5V), temperature range (-40°C to 85°C), and provides identical memory, I/O, and peripheral functionality.
Q: What packaging formats are available?
A: DS89C430-ENG is supplied in standard packaging. DS89C430-ENG+ is supplied in tray packaging, which is compatible with automated assembly processes.
Q: Are there any compliance differences I should consider?
A: DS89C430-ENG+ meets ROHS3 compliance standards, while DS89C430-ENG is RoHS non-compliant. For applications requiring environmental compliance certification, DS89C430-ENG+ is the appropriate selection.
Q: What is the Moisture Sensitivity Level (MSL) for these parts?
A: Both devices have an MSL rating of 3 (168 Hours), indicating standard moisture handling requirements during storage and assembly.
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