W78E54B 查看數據表（PDF） - Winbond

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W78E54B

8-BIT MICROCONTROLLER

Winbond 

W78E54B

DC Characteristics, continued

PARAMETER

SYMBOL TEST CONDITIONS SPECIFICATION UNIT

Input Leakage Current

P0, EA

Output Low Voltage

P1, P2, P3, P4

Output Low Voltage

ALE, PSEN , P0 (*3)

Output High Voltage

P1, P2, P3, P4

Output High Voltage

ALE, PSEN , P0 (*3)

Input Low Voltage

(Except RST)

Input Low Voltage

RST (*4)

Input Low Voltage

XTAL1 (*4)

Input High Voltage

(Except RST)

Sink Current

P1, P2, P3, P4

Input High Voltage

RST (*4)

Input High Voltage

XTAL1 (*4)

Sink Current

P0, ALE, PSEN (*3)

Source Current

P1, P2, P3, P4

Source Current

P0, ALE, PSEN (*3)

ILK

VOL1

VOL2

VOH1

VOH2

VIL1

VIL2

VIL3

VIH1

ISK1

VIH2

VIH3

ISK2

ISR1

ISR2

VDD = 5.5V

0V < VIN < VDD

VDD = 4.5V

IOL1 = +2 mA

VDD = 4.5V

IOL2 = +4 mA

VDD = 4.5V

IOH1 = -100 µA

VDD = 4.5V

IOH2 = -400 µA

VDD = 4.5V

VDD = 4.5V

VDD = 4.5V

VDD = 4.5V

VDD = 4.5V

Vs = 0.45V

VDD = 4.5V

VDD = 4.5V

VDD = 4.5V

Vs = 0.45V

VDD = 4.5V

Vs = 2.4V

VDD = 4.5V

Vs = 2.4V

MIN.

MAX.

-10

+10

µA

-

0.45

V

-

0.45

V

2.4

-

V

2.4

-

V

0

0.8

V

0

0.8

V

0

0.8

V

2.4

VDD +0.2 V

4

12

mA

0.67 VDD VDD +0.2 V

0.67 VDD VDD +0.2 V

8

16

mA

-100

-8

-250

uA

-14

mA

Notes:

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

reaches its maximum value when VIN is approximately 2V.

*2. RST pin has an internal pull-down resistor.

*3. P0, ALE, PSEN are in the external access memory mode.

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

- 13 -

Publication Release Date: December 2000

Revision A3

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