The DS89C430 and DS89C450 are the highest performance available in 8051-compatible microcontrollers. They feature newly designed processor cores that execute instructions up to 12 times faster than the original 8051 at the same crystal speed. Typical applications will experience a speed improvement up to 10x.
The DS89C430 and DS89C450 are 8051‑compatible microcontrollers offering up to 33 MHz operation and 33 MIPS performance. They provide 16 kB or 64 kB of on‑chip flash, three 16‑bit timers, dual full‑duplex serial ports and a range of power‑management features.
The document includes ordering information, absolute maximum ratings, DC and AC electrical characteristics, pin configurations, package outlines and revision history for both devices.
| Maximum Clock Frequency | 33 MHz |
|---|---|
| Supply Voltage | 4.5 V – 5.5 V |
| Active Mode Supply Current | Typical 110 mA |
| Idle Mode Supply Current (33 MHz) | Typical 50 mA |
| Flash Memory Size | 16 kB (DS89C430) / 64 kB (DS89C450) |
The device operates from –40 °C to +85 °C ambient temperature.
The DS89C430 includes 16 kB of flash, while the DS89C450 includes 64 kB of flash.
They can run up to a maximum clock frequency of 33 MHz.