Rainbow-electronics W78C52D Instrukcja Użytkownika Pobierz pdf (Strona 10)

Preliminary W78C52D

- 10 -

DC Characteristics, continued

PARAMETER SYM. SPECIFICATION TEST CONDITIONS

MIN. MAX. UNIT

Input

Input High Voltage

P1, P2, P3, P4

VIH1 2.4 VDD

+0.2

DD = 5.5V

Input High Voltage

RST

VIH2 3.5 VDD

+0.2

DD = 5.5V

Input High Voltage

XTAL1

[*4]

VIH3 3.5 VDD

+0.2

DD = 5.5V

Output

Output Low Voltage

P1, P2, P3, P4

VOL1 - 0.45 V VDD = 4.5V

= +2 mA

Output Low Voltage

P0, ALE,

PSEN

[*4]

VOL2 - 0.45 V VDD = 4.5V

= +4 mA

Sink Current

P1, P2, P3, P4

ISK1 48mA VDD = 4.5V

Vin = 0.45V

Sink Current

P0, ALE,

PSEN

ISK2 816mA VDD = 4.5V

IN = 0.45V

Output High Voltage

P1, P2, P3, P4

VOH1 2.4 - V VDD = 4.5V

= -100 µA

Output High Voltage

P0, ALE,

PSEN

[*4]

VOH2 2.4 - V VDD = 4.5V

= -400 µA

Source Current

P1, P2, P3, P4

ISR1 -100 -250

µA

VDD = 4.5V

IN = 2.4V

Source Current

P0, ALE,

PSEN

ISR2 -8 -14 mA VDD = 4.5V

IN = 2.4V

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.

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 16 17 18

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