M68AF031A datasheet(12/22 Pages) STMICROELECTRONICS

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M68AF031A

12/22

Table 7. Read and Standby Mode AC Characteristics

Note: 1. Test conditions assume transition timing reference level = 0.3VCC or 0.7VCC.

2. At any given temperature and voltage condition, tGHQZ is less than tGLQX and tEHQZ is less than tELQX for any given device.

3. These parameters are defined as the time at which the outputs achieve the open circuit conditions and are not referenced to output

voltage levels.

4. Tested initially and after any design or process changes that may affect these parameters.

Symbol

Parameter

M68AF031A

Unit

Min.

Max.

Min.

Max.

tAVAV

Read Cycle Time

tAVQV

Address Valid to Output Valid

tAXQX

(1)

Data hold from address change

tEHQZ

(2,3)

Chip Enable High to Output Hi-Z

tELQV

Chip Enable Low to Output Valid

tELQX

(1)

Chip Enable Low to Output Lo-Z

tGHQZ

(2,3)

Output Enable High to Output Hi-Z

tGLQV

Output Enable Low to Output Valid

tGLQX

(1)

Output Enable Low to Output Transition

tPD

(4)

Chip Enable High to Power Down

tPU

(4)

Chip Enable Low to Power Up

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