ST2221A datasheet(7/17 Pages) SITI

номер детали	ST2221A

подробное описание детали	5V CMOS Compatible Input

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производитель	SITI [Silicon Touch Technology Inc.]

домашняя страница	http://www.siti.com.tw

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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: 6

Electrical Characteristics (VDD = 5.0 V, Ta = 25°C unless otherwise noted)

CHARACTERISTIC

SYMBOL

CONDITION

MIN.

TYP.

MAX.

UNIT

Input Voltage “H” Level

VIH

⎯

0.7VDD

⎯

VDD

Input Voltage “L” Level

VIL

⎯

GND

⎯

0.3VDD

V

Output Leakage Current

IOH

VOH = 7.5 V

⎯

1.0

uA

VOL

IOL = 1.0 mA

⎯

0.4

Output Voltage ( S - OUT)

VOH

IOH = -1.0 mA

4.6

⎯

V

IOL1

VOUT = 0.7

±0.25V

REXT = 910

Ω

⎯

3

6

%

Output Current (Bit-Bit)

IOL2

VOUT = 0.7

±0.25V

REXT = 360

Ω

⎯

3

6

%

IOL3

VOUT = 0.7V

REXT = 910

Ω

⎯

5

10

%

Output Current (Chip-Chip)

IOL4

VOUT = 0.7V

REXT = 360

Ω

⎯

5

10

%

Supply Voltage Regulation

% / VDD

REXT = 470

Ω, Ta = -40 ~ 85°C

⎯

1.5

5.0

% / V

Pull-Up Resistor

RIN(up)

⎯

150

300

600

K

Ω

Pull-Down Resistor

RIN(down)

⎯

100

200

400

K

Ω

IDD(off)1

REXT = OPEN, OUT0~7 = off

⎯

0.3

0.6

IDD(0ff)2

REXT = 470

Ω, OUT0~7 = off

4.0

5.6

7.8

Supply Current “OFF”

IDD(off)3

REXT = 250

Ω, OUT0~7 = off

7.3

10.2

14.3

IDD(on)1

REXT = 470

Ω, OUT0~7 = on

4.0

5.6

7.8

Supply Current “ON”

IDD(on)2

REXT = 250

Ω, OUT0~7 = on

7.3

10.2

14.3

mA

Switching Characteristics (Ta = 25 °C unless otherwise noted)

CHARACTERISTIC

SYMBOL

CONDITION

MIN.

TYP.

MAX.

UNIT

SIN-OUTn

⎯

115

230

LATCH-OUTn

⎯

115

230

ENABLE-OUTn

⎯

115

230

Propagation

Delay Time

(“L” to “H”)

CLK-SOUT

tpLH

⎯

15

20

ns

SIN-OUTn

⎯

120

160

LATCH-OUTn

⎯

120

160

ENABLE-OUTn

⎯

120

160

Propagation

Delay Time

(“H” to “L”)

CLK-SOUT

tpHL

⎯

15

20

ns

Output Current Rise Time

tor

70

140

280

ns

Output Current Fall Time

tof

VDD=5.0V

VIH=VDD

VIL=GND

REXT=470

Ω1

VL=3.0V

RL=65

Ω

CL=13pF

55

110

220

ns

1 Delay Time tpLH and Rise Time tor will both increase as the Rext value increased.

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