W78LE812

- 16 -

DC Characteristics, continued

SYMBOL

PARAMETER

SPECIFICATION

TEST CONDITIONS

MIN.

MAX.

UNIT

Input Low Voltage

0

0.8

XTAL1

[*3]

0

0.6

V

Input High Voltage

3.5

V

1.6

V

Input High Voltage

3.5

V

RST

1.7

V

Input High Voltage

3.5

V

XTAL1

[*4]

1.6

V

Output

Output Low Voltage

-

0.45

V

P1, P2, P3, P4

-

0.25

V

Output Low Voltage

-

0.45

V

P0, ALE, PSEN

[*4]

-

0.25

V

-

0.22

V

Sink current

4

12

mA

1.8

5.4

mA

Sink current

10

18

mA

P0, ALE, PSEN , P4<5:6>

4.5

9

mA

Sink current P3.4 to P3.7

12

24

mA

in High-Drive mode

Output High Voltage

2.4

-

V

µA

P1, P2, P3, P4

1.4

-

V

µA

Output High Voltage

2.4

-

V

µA

P0, ALE, PSEN

[*4]

1.4

-

V

µA

Source current

-120

-250

µA

P1, P2, P3, P4<0:4>

-20

-40

µA

Source current

-10

-14

mA

P0, ALE, PSEN , P4<5:6>

-1.9

-3.3

mA

Notes:

*1. RST pin has an internal pull-down.

*2. Pins of P1 and P3 can source a transition current when they are being externally driven from 1 to 0.

*3. RST is a Schmitt trigger input and XTAL1 is a CMOS input.

*4. P0, P2, ALE and PSEN are tested in the external access mode.

*5. P3.4 to P3.7 are in normal mode.

*6. P3(P3.4

−P3.7) is used LED driver port by set SFR.