M68Z128 datasheet(5/12 Pages) STMICROELECTRONICS

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M68Z128

Figure 5. Address Controlled, Read Mode AC Waveforms

Note: E1 = Low, E2 = High, G = Low, W = High.

AI01078

tAVAV

tAVQV

tAXQX

A0-A16

DQ0-DQ7

VALID

DATA VALID

Table 7. Read and Standby Modes AC Characteristics

(TA = 0 to 70°C; VCC = 5V ±10%)

Note: 1. CL = 100pF.

2. CL = 5pF.

3. At any given temperature and voltage condition, tEIHQZ + tEZHQZ is less than tEILQX and tEZLQX, tGHQZ is less than tGLQX for any

given device.

Symbol

Parameter

M68Z128

Unit

-55

Min

Max

tAVAV

Read Cycle Time

tAVQV

(1)

Address Valid to Output Valid

tE1LQV

(1)

Chip Enable 1 Low to Output Valid

tE2HQV

(1)

Chip Enable 2 High to Output Valid

tGLQV

(1)

Output Enable Low to Output Valid

tE1LQX

(3)

Chip Enable 1 Low to Output Transition

tE2HQX

(3)

Chip Enable 2 High to Output Transition

tGLQX

(3)

Output Enable Low to Output Transition

tE1HQZ

(2,3)

Chip Enable 1 High to Output Hi-Z

tE2LQZ

(2,3)

Chip Enable 2 Low to Output Hi-Z

tGHQZ

(2,3)

Output Enable High to Output Hi-Z

tAXQX

(1)

Address Transition to Output Transition

tPU

Chip Enable 1 Low or Chip Enable 2 High to Power Up

tPD

Chip Enable 1 High or Chip Enable 2 Low to Power Down

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