DatasheetsPDF.com

ST2221C

SiTI
Part Number ST2221C
Manufacturer SiTI
Description 16-Bit Constant Current LED Drivers
Published Jul 6, 2016
Detailed Description ST2221C Version : A.004 Issue Date : 2002/06/14 File Name : SP-ST2221C-A.004.doc Total Pages : 17 16-Bit Constant ...
Datasheet PDF File ST2221C PDF File

ST2221C
ST2221C

Overview
ST2221C Version : A.
004 Issue Date : 2002/06/14 File Name : SP-ST2221C-A.
004.
doc Total Pages : 17 16-Bit Constant Current LED Drivers 9 7 1 SILICON TOUCH TECHNOLOGY INC.
9-7F-1, Prosperity Road I, Science Based Industrial Park, Hsin-Chu, Taiwan 300, R.
O.
C.
Tel：886-3-5645656 Fax：886-3-5645626 SILICON TOUCH TECHNOLOGY INC.
ST2221C 16-Bit Constant Current LED Drivers ST2221C General Description The ST2221C 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 a 16-bit shift registers, latches, and constant current drivers on a single Silicon CMOS chip.
Features z Constant Current Output : Current with one resistor for 5mA to 90mA z Maximum Clock Frequency : 25MHz (Cascade Operation) z 5V CMOS Compatible Input z Package : DIP24 , SOP24, SSOP24 z Constant Current Matching: (Ta = 25°C、VDD = 5.
0V) Bit-to-Bit: ± 6.
0%、Chip-to-Chip : ± 10.
0%、 @ IOUT = 5 ~ 90mA 16-Bit Constant Current LED Drivers -1- Version：A.
004 SILICON TOUCH TECHNOLOGY INC.
Pin Connection (Top view) GND SERIAL-IN CLOCK LATCH OUT0 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 1 2 3 4 5 6 7 8 9 10 11 12 24 VDD 23 R-EXT 22 SERIAL-OUT 21 ENABLE 20 OUT15 19 OUT14 18 OUT13 17 OUT12 16 OUT11 15 OUT10 14 OUT9 13 OUT8 ST2221C Block Diagram R-EXT OUT0 OUT1 I-REG.
OUT15 ENABLE LATCH SERIAL-IN CLOCK Q ST D Q ST D DQ CK DQ CK Q ST D DQ CK DQ CK SERIAL-OUT 16-Bit Constant Current LED Drivers -2- Version：A.
004 SILICON TOUCH TECHNOLOGY INC.
Timing Diagram CLOCK 1 SERIAL-IN LATCH ENABLE OUT0 OUT1 OUT2 OUT15 SERIAL-OUT 2 3 15 16 ST2221C 5V 0V 5V 0V 5V 0V 5V 0V On Off On Off On Off On Off 5V 0V (Note) Latches are level sensitive (not edge triggered).
LATCH-terminal = H level, latches become transparent; LATCH-terminal = L level, latches hold data.
ENABLE-terminal = H level, all outputs (OUT0~15) are off.
An external resistor is connected between R-EXT a...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)