W78L051C24FL 데이터 시트보기 (PDF) - Winbond

부품명

상세내역

제조사

W78L051C24FL

8-BIT MICROCONTROLLER

Winbond 

W78LE51C/W78L051C

10. AC CHARACTERISTICS

The AC specifications are a function of the particular process used to manufacture the part, the ratings

of the I/O buffers, the capacitive load, and the internal routing capacitance. Most of the specifications

can be expressed in terms of multiple input clock periods (TCP), and actual parts will usually

experience less than a ±20 nS variation. The numbers below represent the performance expected

from a 0.6micron CMOS process when using 2 and 4 mA output buffers.

Clock Input Waveform

XTAL1

TCH

TCL

F OP, TCP

PARAMETER

Operating Speed

Clock Period

Clock High

Clock Low

SYMBOL

FOP

TCP

TCH

TCL

MIN.

0

50

25

25

Notes:

1. The clock may be stopped indefinitely in either state.

2. The TCP specification is used as a reference in other specifications.

3. There are no duty cycle requirements on the XTAL1 input.

TYP.

-

-

-

-

MAX.

20

-

-

-

Program Fetch Cycle

PARAMETER

Address Valid to ALE Low

Address Hold from ALE Low

SYMBOL

TAAS

TAAH

MIN.

1 TCP -Δ

1 TCP -Δ

ALE Low to PSEN Low

TAPL

1 TCP -Δ

PSEN Low to Data Valid

TPDA

-

Data Hold after PSEN High

TPDH

0

Data Float after PSEN High

ALE Pulse Width

TPDZ

TALW

0

2 TCP -Δ

PSEN Pulse Width

TPSW

3 TCP -Δ

Notes:

1. P0.0−P0.7, P2.0−P2.7 remain stable throughout entire memory cycle.

2. Memory access time is 3 TCP.

3. Data have been latched internally prior to PSEN going high.

4. "Δ" (due to buffer driving delay and wire loading) is 20 nS.

TYP.

-

-

-

-

-

-

2 TCP

3 TCP

MAX.

-

-

-

2 TCP

1 TCP

1 TCP

-

-

UNIT

MHz

nS

nS

nS

UNIT

nS

nS

nS

nS

nS

nS

nS

nS

NOTES

1

2

3

3

NOTES

4

1, 4

4

2

3

4

4

- 14 -

Share Link: