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8 Bit MCU, DS8 Family DS89C4xx Series Microcontrollers, 25 MHz, 64 KB, 1 KB, 44 Pins, TQFP

The DS89C450-ENG+ is an ultra-high-speed flash microcontroller in a 44 pin TQFP package. It is a standard 8051 compatible microcontroller and includes standard resources such as three timer/counters, serial port, and four 8-bit I/O ports. The newly designed processor cores execute instructions up to 12 times faster than the original 8051 at the same crystal speed. Typical applications have a speed improvement of up to 10 times. At 1MIPS/MHz, the microcontrollers achieve 33 MIPS performance from a maximum 33 MHz clock rate. It includes 1 KB of data RAM, a second full hardware serial port, seven additional interrupts, two extra levels of interrupt priority, a programmable watchdog timer, a brownout monitor, and a power-fail reset. Dual data pointers (DPTRs) are included with automatic increment/decrement and toggle select operation. The speed of MOVX data memory access can be adjusted by adding stretch values up to 10 machine cycles for flexibility in selecting external memory and peripherals.

  • Supply voltage range is 4.5V to 5.5V
  • Operating temperature range from -40°C to 85°C
  • Internal flash memory is 64KB
  • Single-cycle instruction in 30ns
  • Supports four paged memory-access modes
  • 256 bytes scratchpad RAM
  • Programmable clock divider
  • Automatic hardware and software exit
  • Allows access to the entire external memory map
  • Dynamically adjustable by software
  • Automated Test Equipment(ATE); Building Energy Control and Management; Building Security and Door Access Control
  • Consumer Electronics; Data Logging; Gaming Equipment; HVAC; Industrial Control and Automation
  • Magstripe Reader/Scanner; Motor Control
  • Programmable Logic Controllers; Telephones; Uninterruptible Power Supplies; Vending; White Goods (Washers, Microwaves, Etc.)

Embedded Design & Development, Automotive, Industrial, Automation & Process Control, Consumer Electronics, Motor Drive & Control, Security

Technical Doc: DS89C450-ENG+  Datasheet

Additional information

Manufacturer Part No.





Available for back order

CPU Speed


RoHS Compliant

Program Memory Size

Product Range

DS8 Family DS89C4xx Series Microcontrollers

Pack Quantity




RAM Memory Size

No. of Pins

MCU Case Style

No. of I/O's

Embedded Interface Type

Supply Voltage Min

Supply Voltage Max

MCU Family

MCU Series

RoHs Phthalates Compliant


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