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BUY DS89C450-QNL+ https://www.utsource.net/itm/p/7431496.html
8051 89C Microcontroller IC 8-Bit 33MHz 64KB (64K x 8) FLASH 44-PLCC (16.59x16.59)
The DS89C450-QNL+ is an 8-bit microcontroller manufactured by Maxim Integrated. It is part of the DS89C4xx family of microcontrollers, which are based on the 8051 core architecture. The DS89C450-QNL+ is a 44-LCC (J-Lead) package, which is a leadless chip carrier package. It has a maximum operating temperature of 85°C and a maximum clock frequency of 40 MHz. The DS89C450-QNL+ features 8K bytes of on-chip Flash memory, 128 bytes of on-chip RAM, an 8051 CPU core, two 16-bit timer/counters, a serial interface, and an interrupt controller. It also has an on-chip oscillator and a power-down mode. The DS89C450-QNL+ is suitable for a wide range of applications, including industrial control, consumer electronics, automotive, and medical devices. It is also suitable for use in embedded systems and real-time applications. (For reference only)