W78C58

Publication Release Date: December 1997

- 13 -

Revision A5

DC Characteristics, continued

PARAMETER

SYM.

SPECIFICATION

UNIT

TEST CONDITIONS

MIN.

MAX.

Input Low Voltage

0

0.8

V

Input Low Voltage

RST

0

0.8

V

Input Low Voltage

XTAL1[*4]

0

0.8

V

Input High Voltage

2.4

V

Input High Voltage

RST

3.5

V

Input High Voltage

XTAL1 [*4]

3.5

V

Output Low Voltage

P1, P2, P3, P4

-

0.45

V

Output Low Voltage

P0, ALE, PSEN [*3]

-

0.45

V

Sink Current

P1, P2, P3, P4

4

8

mA

Vs = 0.45V

Sink Current

P0, ALE, PSEN

10

14

mA

Vs = 0.45V

Output High Voltage

P1, P2, P3, P4

2.4

-

V

µA

Output High Voltage

P0, ALE, PSEN [*3]

2.4

-

V

µA

Source Current

P1, P2, P3, P4

-120

-180

µA

Vs = 2.4V

Source Current

P0, ALE, PSEN

-8

-14

mA

Vs = 2.4V

Notes:

*1. RST pin is a Schmitt trigger input. RST has internal pull-low resistors of about 30 K

Ω.

*3. P0, ALE and /PSEN are tested in the external access mode.

*4. XTAL1 is a CMOS input.

*5. Pins of P1, P2, P3, P4 can source a transition current when they are being externally driven from 1 to 0. The transition