Silan

Semiconductors

SC8521

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

REV: 1.3

2002.03.01

3

Symbol

Parameter

Test condition

Min

Type

Max

Unit

Operating supply voltage

2.2

--

4.5

V

Supply current

°C

--

--

2

mA

Quiescent current

°C

--

--

1

µA

Operating ambient temperature

-10

--

+50

°C

Sense lines (input only and will have a weak internal pull-up resistance)

LOW level input voltage

--

--

V

HIGH level input voltage

--

--

V

Pull-up resistance

Rpu

50

--

100

K

Ω

Driver lines (output only; open drain; maximum on-resistance when LOW)

Maximum on-resistance

Ron

--

--

2

K

Ω

Output drive (has a weak pull-up resistance)

Source current

Isink

3.5

4.5

5.5

mA

PIN DESCRIPTION

20-pin dual in-line and small outline package (SO-20)

Pin No.

Symbol

Description

1

XTAL1

Oscillator input

2

XTAL2

Oscillator output

3

SN7

Sense line 7 for key matrix

4

SN0

Sense line 0 for key matrix

5

SN1

Sense line 1 for key matrix

6

SN2

Sense line 2 for key matrix

7

SN3

Sense line 3 for key matrix

8

SN6

Sense line 6 for matrix

9

SN4

Sense line 4 for matrix

10

SN5

Sense line 5 for matrix

11

DR5

Drive line 5 for key matrix (active LOW)

12

DR4

Drive line 4 for key matrix (active LOW)

13

DR3

Drive line 3 for key matrix (active LOW)

14

DR2

Drive line 2 for key matrix (active LOW)

15

DR1

Drive line 1 for key matrix (active LOW)

16

DR0

Drive line 0 for key matrix (active LOW)

To be continued