HT6221/HT6222

Multi-Purpose Encoders

www.artschip.com

4

Absolute Maximum Ratings

Supply Voltage…………………..-0.3V to 6V

Storage Temperature………..-50℃ to 125℃

Operating Temperature…….-20℃ to 75℃

Note:

These are stress ratings only. Stresses exceeding the range specified under “Absolute Maximum Ratings” may cause

substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is

not implied and prolonged exposure to extreme conditions may affect device reliability.

Electrical Characteristic

Ta=25℃

Test Conditions

Symbol

Parameter

VDD

Conditions

Min.

Typ.

Max.

Unit

Operating Voltage

-

-

1.8

3

3.5

V

Standby Current

3V

Oscillator stops

-

0.1

1.0

µA

Operating Current

3V

No load

-

200

400

µA

Output Source Current for DOUT

3V

-2.0

-4.0

-

mA

Output Sink Current for DOUT

3V

Vo=0.3V

50

100

-

µA

Output Source Current for LED

3V

-10

-60

-

µA

Output Sink Current for LED

3V

Vo=0.3V

1.2

2.0

-

mA

Output Source Current for C1~C8

3V

-0.6

-2.0

-

mA

Output Sink Current for C1~C8

3V

Vo=0.3V

10

30

-

µA

Input High Voltage for R1~R8

3V

-

1.9

-

30

V

Input Low Voltage for R1~R8

3V

-

0

-

0.8

V

Input Low Voltage for C1~C8

3V

-

1.1

-

3.0

V

Input Low Voltage for C1~C8

3V

-

0

-

0.6

V

Input High Voltage for AIN

3V

-

1.25

-

3.0

V

Input Low Voltage for AIN

3V

-

0

-

0.6

V

Input Pull-high Resistance for AIN

3V

100

200

400

K Ω

Input Pull-low Resistance for AIN

3V

70

150

250

K Ω

Input Pull-low Resistance for R1~R8

3V

120

200

320

K Ω

Input Pull-Low Resistance for C1~C8

3V

300

500

1500

K Ω

System Frequency

-

455kHz ceramic

resonator

-

455

-

kHz

Functional Description

Keyboard scan

The HT6221/HT6222 remain in the halt mode during the

standby state (at this time, the oscillator stops, and the

standby current <1µA). The HT6221 consists of 32 active

keys, and the HT6222 has 64 active keys. The keyboard

forms of the HT6221/HT6222 are shown below.

The HT6221 keyboard form

The HT6222 keyboard form