MD8031AH/B
| Parameters | |
|---|---|
| RoHS Status | Not applicable |
| Mfr | Rochester Electronics, LLC |
| Package | Bulk |
| Product Status | Active |
| REACH Status | Vendor Undefined |
| Standard Package | 1 |
| HTSUS | 0000.00.0000 |
| Series | * |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
MD8031AH/B 8-bit microcontroller MCS-51 family mcu
The MD8031AH/B is a foundational 8-bit microcontroller from Intel's MCS-51 family, representing the original "ROMless" variant that requires external program memory for operation. Fabricated using high-performance HMOS technology, this device operates on a standard 5V supply and features a core architecture optimized for control applications. It integrates 128 bytes of internal RAM, two 16-bit timer/counters, a full-duplex UART for serial communication, and four 8-bit bidirectional I/O ports providing 32 programmable lines. Housed in a 40-pin DIP (Dual In-line Package), the chip is specified for an extended temperature range of -40°C to +85°C. Its design mandates that the EA (External Access) pin be tied low to enable program execution from an external ROM or EPROM, making it highly flexible for prototyping and systems requiring large code space beyond the typical 4KB limit of contemporary on-chip ROM variants.
Alternative Microcontroller Models
● AT89C51 (Microchip/Atmel): A CMOS Flash-based 8051 microcontroller with 4KB of on-chip reprogrammable memory, eliminating the need for external ROM in most applications.
● P80C31BH (NXP Semiconductors): A low-power CMOS version of the 8031 offering reduced power consumption while maintaining full pin and instruction set compatibility.
● DS80C320 (Maxim Integrated): A high-speed variant featuring a redesigned core that executes instructions up to 3 times faster than the standard 8031 at the same clock frequency.
● C8051F310 (Silicon Labs): A fully integrated mixed-signal SoC with on-chip ADC, DAC, and Flash memory, representing a modern superset of the 8031 architecture.
