Data Sheet M10693EJ7V0DS00

9

µµµµPD43257B

Read Cycle

Parameter

Symbol

µPD43257B-70

µPD43257B-85

Unit

Condition

MIN.

MAX.

MIN.

MAX.

Read cycle time

70

85

ns

Address access time

70

85

ns

Note 1

/CE1 access time

70

85

ns

CE2 access time

70

85

ns

Output hold from address change

10

10

ns

/CE1 to output in low impedance

10

10

ns

Note 2

CE2 to output in low impedance

10

10

ns

/CE1 to output in high impedance

30

30

ns

CE2 to output in high impedance

30

30

ns

Notes 1. See the output load shown in Figure 1.

2. See the output load shown in Figure 2.

Remark These AC characteristics are in common regardless of package types and L, LL versions.

Read Cycle Timing Chart

High impedance

Data out

CE2 (Input)

/CE1 (Input)

Address (Input)

I/O (Output)

Remark

In read cycle, /WE should be fixed to high level.