Core: high-speed 8051
Operating frequency: 12MHz, 6MHz, 4MHz, 1MHz
Clock error: ±1% @-20℃~65℃, 5V      ± 3%@ -40℃~105℃, 5V
CODE: 16K  Bytes
DATA: 1K  Bytes
SRAM: 256 Bytes(data)+512 Bytes(xdata)
Support BOOT function area, 1/2/3/4K selected
Package:  SOP16
Core: high-speed 8051
Operating frequency: 12MHz, 6MHz, 4MHz, 1MHz
Clock error: ±1% @-20℃~65℃, 5V      ± 3%@ -40℃~105℃, 5V
CODE: 16K  Bytes
DATA: 1K  Bytes
SRAM: 256 Bytes(data)+512 Bytes(xdata)
Support BOOT function area, 1/2/3/4K selected
Package:  SOP20/TSSOP20
Core: high-speed 8051
Operating frequency: 12MHz, 6MHz, 4MHz, 1MHz
Clock error: ±1% @-20℃~65℃, 5V      ± 3%@ -40℃~105℃, 5V
CODE: 16K  Bytes
DATA: 1K  Bytes
SRAM: 256 Bytes(data)+512 Bytes(xdata)
Support BOOT function area, 1/2/3/4K selected
Package: SOP28/TSSOP28
Core: 1T 8051
Operating frequency: 12MHz, 8MHz, 4MHz, 1MHz
Clock error: ±1% @ -20℃~65℃, 5V ±3% @ -40℃~105℃, 5V
CODE: 63K Bytes
DATA: 1K Bytes +2*512 Bytes
SRAM: 256 Bytes(data)+4K Bytes(xdata)
Support 2K/4K/8K BOOT function area
Package:LQFP44
Core: high-speed 8051
Operating frequency: 12MHz, 6MHz, 4MHz, 1MHz
Clock error: ±1% @-20°C~65°C, 5V ; ±3% @ -40°C~105°C, 5V
CODE: 16K Bytes
DATA: 1K Bytes
SRAM: 256 Bytes(data)+512 Bytes(xdata)
Support BOOT function area, 1/2/3/4K selected
Package:SOP16
Core: high-speed 8051
Operating frequency: 12MHz, 6MHz, 4MHz, 1MHz
Clock error: ±1% @-20°C~65°C,5V ; ±3% @ -40°C~105°C,5V
CODE: 16K Bytes
DATA: 1K Bytes
SRAM: 256 Bytes(data)+512 Bytes(xdata)
Support BOOT function area, 1/2/3/4K selected
Package: SOP20
Core: high-speed 8051
Operating frequency: 12MHz, 6MHz, 4MHz, 1MHz
Clock error:±1% @-20℃~65℃,5V ; ±3% @ -40℃~105℃,5V
CODE:16K Bytes
DATA: 1K Bytes
SRAM:256 Bytes(data)+512 Bytes(xdata)
Support BOOT function area,1/2/3/4K selected
Package: SOP28
Core: high-speed 8051
Operating frequency: 12MHz, 6MHz, 4MHz, 1MHz
Clock error: ±1%@25℃, 2.7V~5.5V ±3%@-40℃~105℃, 5V
CODE:16K Bytes
DATA: 1K Bytes
SRAM: 256 Bytes(data)+512 Bytes(xdata)
Support BOOT function area, 1/2/3/4K selected
Package: SOP16
Core: high-speed 8051
Operating frequency: 12MHz, 6MHz, 4MHz, 1MHz
Clock error: ±1%@25℃, 2.7V~5.5V ±3%@-40℃~105℃, 5V
CODE:16K Bytes
DATA: 1K Bytes
SRAM: 256 Bytes(data)+512 Bytes(xdata)
Support BOOT function area, 1/2/3/4K selected
Package: SOP20/TSSOP20
Core: high-speed 8051
Operating frequency: 12MHz, 6MHz, 4MHz, 1MHz
Clock error: ±1%@25℃, 2.7V~5.5V ±3%@-40℃~105℃, 5V
CODE: 16K Bytes
DATA: 1K Bytes
SRAM: 256 Bytes(data)+512 Bytes(xdata)
Support BOOT function area, 1/2/3/4K selected
Package: SOP28/TSSOP28
Core: 1T 8051
Operating frequency 12MHz, 6MHz, 4MHz, 1MHz
Clock error: ±1% @ -20℃ ~65℃, 5V ±3% @ -40℃ ~105℃, 5V
CODE: 32K Bytes
DATA: 2*512 Bytes
SRAM: 256 Bytes(data)+1024 Bytes(xdata)
Support 4K BOOT function
Package: SOP20/TSSOP20
Core: 1T 8051
Operating frequency 12MHz, 6MHz, 4MHz, 1MHz
Clock error: ±1% @ -20℃ ~65℃, 5V ±3% @ -40℃ ~105℃, 5V
CODE: 32K Bytes
DATA: 2*512 Bytes
SRAM: 256 Bytes(data)+1024 Bytes(xdata)
Support 4K BOOT function
Package: SOP28/TSSOP28