st2221a Silicon Touch Technology Inc., st2221a Datasheet - Page 2

• Manufacturer Part Number: st2221a
• Description: 8-bit Constant Current Led Drivers
• Manufacturer: Silicon Touch Technology Inc.

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