Microchip Technology AT89C4051-12SI Microcontroller, Microprocessor, FPGA Modules
IC MCU 8BIT 4KB FLASH 20SOIC
Same model may have multiple batches, images only for reference.
Manufacturer
Part Number (MPN)
AT89C4051-12SI
Series
Detailed Description
IC MCU 8BIT 4KB FLASH 20SOIC
Package
20-SOIC (0.295", 7.50mm Width)
Key Features
Package / Case: 20-SOIC (0.295", 7.50mm Width); Mounting Type: Surface Mount
Lifecycle Status
Obsolete
RoHS State
RoHS Compliant
Datasheet
AT89C4051-12SI Datasheet
Quick Jump:
Technical Specifications
Microchip Technology AT89C4051-12SI Microcontroller, Microprocessor, FPGA Modules technical specifications.
General
Series
89C
RAM Size
128 x 8
RoHS
Yes
Package / Case
20-SOIC
Mounting Type
Surface Mount
Operating Temperature
-40°C ~ 85°C (TA)
Supply Voltage
4V ~ 6V
Lifecycle Status
Obsolete
Peripherals
Brown-out Detect/Reset, LED, POR
Number of I/O
15
Related Parts Comparison (AT89C4051-12SI vs AT89C1051-24PC vs AT89C52-24JC vs AT89C51-24AC)
Side-by-side specifications of related catalog parts.
Engineering verification required. Related parts may have different electrical ratings, pinouts, footprints, and operating limits. Verify suitability for your circuit before substitution.
| This Part | Related Part | Related Part | Related Part | |
|---|---|---|---|---|
| Series | 89C | -- | 89C | 89C |
| Package / Case | 20-SOIC | -- | 44-LCC | 44-TQFP |
| Mounting Type | Surface Mount | -- | Surface Mount | Surface Mount |
| Operating Temperature | -40°C ~ 85°C (TA) | -- | 0°C ~ 70°C | 0°C ~ 70°C |
| Supply Voltage | 4V ~ 6V | -- | 4V ~ 6V | 4V ~ 6V |
| Core Processor | 8051 | -- | 8051 | 8051 |
| Core Size | 8-Bit | -- | 8-Bit | 8-Bit |
| RAM Size | 128 x 8 | -- | 256 x 8 | 128 x 8 |
| RoHS | Yes | -- | Yes | Yes |
| Lifecycle Status | Obsolete | -- | Obsolete | Obsolete |
| Connectivity | UART/USART | -- | SIO, UART/USART | UART/USART |
| Number of I/O | 15 | -- | 32 | 32 |
| Action |
Cross Reference
Manufacturer-stated alternates from official cross-reference tools. These are not a guaranteed pin-compatible drop-in. Qualify package, pinout, and electrical limits against the datasheet before a board change. See cross-reference vs drop-in compatible .
Suggested replacements
MC9S08PA4VWJNXP SemiconductorsNXP
IC MCU 8BIT 4KB FLASH 20SOIC
MC9S08PL4CTJNXP SemiconductorsNXP
IC MCU 8BIT 4KB FLASH 20TSSOP
MC9S08QD4VSCNXP SemiconductorsNXP
IC MCU 8BIT 4KB FLASH 8SOIC
More Parts in Microcontrollers
Browse additional parts from the same category, grouped by series, package type, and manufacturer. These are catalog suggestions — not verified pin-compatible alternates.
