CRD89C51

4KB Flash, 128B RAM, 3V or 5V, 40 MHz

CRD89C51R

4KB Flash, 256B RAM, 3V or 5V, 40 MHz

CRD89C4051

4KB Flash, 128B Ram, 3V or 5V, 40 MHz, 20 pin package 

CRD89C51RA2

8K+4K Flash, ISP,1024B RAM, 3 16 bit timers, UART, PWM, WDT, dual DPTR, PCA,  extended keyboard interrupt structure, 6T/12T program execution, high endurance Flash with EEPROM functionality.

CRD89C51RA

8KB Flash, 256B RAM, 3V or 5V, 40 MHz 

CRD89C51AA

8KB Flash, 256B RAM, 8-bit ADC, LCD drive, 3V or 5V, 40 MHz

CRD89C51RB

16KB Flash, 1024B RAM, 3V or 5V, 40 MHz

CRD89C51RB2

16K Flash, ISP,1024B RAM, 3 16 bit timers, UART, PWM, WDT, dual DPTR, PCA,  extended keyboard interrupt structure, 6T/12T

CRD89C51RC

32KB Flash, 1024B RAM, 3V or 5V, 40 MHz

CRD89C51AC

32KB Flash, 1024B RAM, ADC, real time clk, 3V or 5V, 40 MHz

CRD89C51RD

64KB Flash, ISP, 1024B RAM, 3 16-bit timers, PWM, WDT, 5V, 40 MHz

CRD89L51RD

64KB Flash, ISP, 1024B RAM, I2C, UART, 3 16-bit timers, PWM, 3V, 25 MHz

CRD89C665

64KB Flash, 4KB RAM, 3 16-bit timers, PWM, WDT, 2.5V, 3V or 5V, 35 MHz

CRD89C51AD

64KB Flash, 1024B RAM, ADC, RTC, UART, 3 16-bit timers, PWM, 3V or 5V, 40 MHz

CRD89C51RD1T

64KB Flash, ISP, 1024B RAM, Dual DPTR, 2 UART, 3 16-bit counters, I2C, SPI, ICE, 36-bit I/O

CRD89C512RD

2x64KB Flash, ISP, 1024B RAM, UART, 3 16-bit timers, PWM, WDT, 5V, 40 MHz

CRD89C51RE

128KB flash, ISP, 1024B RAM, I2C, UART, 3 16-bit timers, PWM, WDT, 5V, 40 MHz