Microchip Technology AT89C
AT89C variants from Microchip Technology
AT89C Overview
What changes between part numbers, and what to check before you lock the BOM — Microcontrollers.
Key Features
- Footprint / package: 28-SOIC (0.400, 10.16mm Width), 44-LQFPLand pattern and thermal pad differ between these packages — run a quick footprint check before you swap variants.
- Lifecycle mix: ActiveConfirm lifecycle on the exact MPN, not just the base number prefix.
- 24 distinct suffix patternsExamples: 2051-24PU, 2051-24SU, 5115-RATUM, 5115-SISUM, 5115-TISUM (+19 more). Decode suffix meaning in the ordering notes under the variant table.
Target Applications
- Microcontrollers — design-in and field replacement
- BOM scrub where only the base prefix is known but suffix is TBD
- Second-source checks when the original MPN is constrained
Ordering Variants
Compare 24 AT89C part numbers by package, electrical parameters, lifecycle, and availability. Use RFQ for stock and lead-time confirmation.
| Part Number | Description | Package Type | Manufacturer | Lifecycle | RoHS | Availability | Action |
|---|---|---|---|---|---|---|---|
| AT89C2051-24PU | IC MCU 8BIT 2KB FLASH 20DIP | - | Microchip Technology | Active | Compliant | In Stock | |
| AT89C2051-24SU | IC MCU 8BIT 2KB FLASH 20SOIC | - | Microchip Technology | Active | Compliant | In Stock | |
| AT89C5115-RATUM | IC MCU 8BIT 16KB FLASH 32VQFP | - | Microchip Technology | Active | Compliant | In Stock | |
| AT89C5115-SISUM | IC MCU 8BIT 16KB FLASH 28PLCC | - | Microchip Technology | Active | Compliant | In Stock | |
| AT89C5115-TISUM | Package: 28-SOIC (0.400, 10.16mm Width) | Operating Temperature: -40°C ~ 85°C (TA) | Peripherals: POR, PWM, WDT | Speed: 40MHz | Connectivity: UART/USART | Series: 89C | 28-SOIC (0.400, 10.16mm Width) | Microchip Technology | Active | Compliant | In Stock | |
| AT89C5130A-RDTUM | IC MCU 8BIT 16KB FLASH 64VQFP | - | Microchip Technology | Active | Compliant | In Stock | |
| AT89C51AC2-SLSUM | IC MCU 8BIT 32KB FLASH 44PLCC | - | Microchip Technology | Active | Compliant | In Stock | |
| AT89C51AC3-RDTUM | IC MCU 8BIT 64KB FLASH 64LQFP | - | Microchip Technology | Active | Compliant | In Stock | |
| AT89C51CC01UA-SLSUM | IC MCU 8BIT 32KB FLASH 44PLCC | - | Microchip Technology | Active | Compliant | In Stock | |
| AT89C51CC02CA-RATUM | IC MCU 8BIT 16KB FLASH 32VQFP | - | Microchip Technology | Active | Compliant | In Stock | |
| AT89C51CC02UA-TISUM | IC MCU 8BIT 16KB FLASH 28SOIC | - | Microchip Technology | Active | Compliant | In Stock | |
| AT89C51CC03UA-RDTUM | IC MCU 8BIT 64KB FLASH 64LQFP | - | Microchip Technology | Active | Compliant | In Stock | |
| AT89C51CC03UAT-RLTUM | IC MCU 8BIT 64KB FLASH 44VQFP | - | Microchip Technology | Active | Compliant | In Stock | |
| AT89C51ED2-RDTUM | IC MCU 8BIT 64KB FLASH 64VQFP | - | Microchip Technology | Active | Compliant | In Stock | |
| AT89C51ED2-SLRUM | IC MCU 8BIT 64KB FLASH 44PLCC | - | Microchip Technology | Active | Compliant | In Stock | |
| AT89C51IC2-SLSUM | IC MCU 8BIT 32KB FLASH 44PLCC | - | Microchip Technology | Active | Compliant | In Stock | |
| AT89C51RB2-SLSUL | IC MCU 8BIT 16KB FLASH 44PLCC | - | Microchip Technology | Active | Compliant | In Stock | |
| AT89C51RC-24AU | IC MCU 8BIT 32KB FLASH 44TQFP | - | Microchip Technology | Active | Compliant | In Stock | |
| AT89C51RC2-SLSUL | IC MCU 8BIT 32KB FLASH 44PLCC | - | Microchip Technology | Active | Compliant | In Stock | |
| AT89C51RC2T-RLTUM | Package: 44-LQFP | Mounting Type: Surface Mount | Operating Temperature: -40°C ~ 85°C (TA) | Supplier Device Package: 44-VQFP (10x10) | Peripherals: POR, PWM, WDT | Number of I O: 32 | 44-LQFP | Microchip Technology | Active | Compliant | In Stock |
Ordering Code Differences
How suffixes on AT89C map to package, grade, and reel options.
How to Choose the Right AT89C Microcontrollers
Match the footprint first
Packages here: 28-SOIC (0.400, 10.16mm Width), 44-LQFP. Open the land-pattern drawing before you substitute a different suffix.
Electrical headroom
Compare voltage and current columns in the variant table. For AT89C, a suffix with lower voltage or current rating will not survive the same circuit without recalculation.
Temp grade letter matters
Commercial (0–70 °C) and industrial (−40–85 °C+) suffixes look similar in the prefix — confirm ambient + self-heating, not just the first page of the datasheet.
Copy the full MPN
Do not BOM only "AT89C" — include the full suffix (e.g. 2051-24PU, 2051-24SU, 5115-RATUM). RFQ with reel/tube preference and required date code.
Technical Specifications
Core parameters for AT89C product family
Identity
Base Model
AT89C
Manufacturer
Microchip Technology
Series
89C
Listed Variants
24
Variant Parameters
Package Type
28-SOIC (0.400, 10.16mm Width), 44-LQFP
Lifecycle Status
Active
RoHS Status
Compliant
Source AT89C with Octatronics
Request stock confirmation, lead time, date code, and pricing for all 24 ordering variants from Microchip Technology. Our team supports active, EOL, and hard-to-find component sourcing.
- Original manufacturer parts with traceability options
- BOM upload and multi-line RFQ support
- Package, grade, and compliance verification
Frequently Asked Questions
Common technical questions about the AT89C product family.
AT89C is a base / family code from Microchip Technology. You order a full MPN such as AT89C2051-24PU, AT89C2051-24SU, AT89C5115-RATUM. The variant table lists 24 orderable lines with different suffixes.
Listed suffix fragments include: 2051-24PU, 2051-24SU, 5115-RATUM, 5115-SISUM, 5115-TISUM, 5130A-RDTUM. Typically they encode package (28-SOIC (0.400, 10.16mm Width), 44-LQFP), temperature grade, and tape/reel option. Always decode on the Microchip Technology datasheet ordering guide — do not guess from pattern alone.
On this page the varying fields are: Package Type. Filter the table by the parameter you care about before picking an MPN.
Only after footprint and thermal review. Packages listed here (28-SOIC (0.400, 10.16mm Width), 44-LQFP) use different land patterns and often different thermal resistance. Layout swaps need a new paste stencil at minimum, not just a BOM edit.
Lifecycle values in our listing: Active. Status is per MPN suffix — one variant can be Active while another is NRND. Check PCN for your exact suffix before multi-year commitments.
Full manufacturer MPN (not just AT89C), quantity, needed date code, reel vs tube, and any compliance docs (CoC, RoHS, conflict minerals). If you only know the base prefix, include a photo of the existing label or reel.
Use the datasheet link in the page header. Cross-check electrical curves (SOA, saturation voltage, etc.) against your operating point — the table summarizes order codes, not every graph in the PDF.