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ST2221A Arkusz danych(PDF) 2 Page - Silicon Touch Technology Inc. |
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ST2221A Arkusz danych(HTML) 2 Page - Silicon Touch Technology Inc. |
2 / 17 page 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC . ST2221A 8-BIT CONSTANT CURRENT LED DRIVERS Version:A.036 Page: 1 ST2221A 8-Bit CONSTANT CURRENT LED DRIVERS General Description The ST2221A is specifically designed for LED and LED DISPLAY constant current drivers. The value of constant current can be varied using an external resistor (Iout = 5 ~90mA). The devices include an 8-bit shift registers, latches, and constant current drivers on a single Silicon CMOS chip. Features Constant Current Output : Current with one resistor for 5mA to 90mA Maximum Clock Frequency : 25MHz (Cascade Operation) 5V CMOS Compatible Input Package : PDIP16,SOP16,SSOP16 Constant Current Matching: (Ta = 25 °C、VDD = 5.0V) Bit-to-Bit : ± 6%、Chip-to-Chip : ± 10%、 @ IOUT = 5 ~ 40mA Bit-to-Bit : ± 6%、Chip-to-Chip : ± 10%、 @ IOUT = 40 ~ 90mA |
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