M28256-25NS6T(1999) 查看數據表（PDF） - STMicroelectronics

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M28256-25NS6T
(Rev.:1999)

256 Kbit (32K x 8) Parallel EEPROM With Software Data Protection

STMicroelectronics 

M28256

Table 10. Read Mode AC Characteristics

(TA = 0 to 70°C or –40 to 85°C; VCC = 4.5V to 5.5V)

Symbol Alt

Parameter

Test Condition

-90

M28256

-12

-15

-20

Unit

min max min max min max min max

tAVQV

tACC

Address Valid to

Output Valid

E = VIL, G = VIL

90

120

150

200 ns

tELQV

tCE

Chip Enable Low to

Output Valid

G = VIL

90

120

150

200 ns

tGLQV

tOE

Output Enable Low

to Output Valid

E = VIL

40

45

50

50 ns

tEHQZ (1)

tDF

Chip Enable High to

Output Hi-Z

G = VIL

0 40 0 45 0 50 0 50 ns

tGHQZ (1)

tDF

Output Enable High

to Output Hi-Z

E = VIL

0 40 0 45 0 50 0 50 ns

tAXQX

tOH

Address Transition

to Output Transition

E = VIL, G = VIL

0

0

0

0

ns

Note: 1. Output Hi-Z is defined as the point at which data is no longer driven.

Table 11. Read Mode AC Characteristics

(TA = 0 to 70°C or –40 to 85°C; VCC = 2.7V to 3.6V)

Symbol Alt

Parameter

Test Condition

-12

M28256-W

-15

-20

-25

Unit

min max min max min max min max

tAVQV

tACC

Address Valid to

Output Valid

E = VIL, G = VIL

120

150

200

250 ns

tELQV

tCE

Chip Enable Low to

Output Valid

G = VIL

120

150

200

250 ns

tGLQV

tOE

Output Enable Low

to Output Valid

E = VIL

45

70

80

100 ns

tEHQZ (1)

tDF

Chip Enable High to

Output Hi-Z

G = VIL

0 45 0 50 0 55 0 60 ns

tGHQZ (1)

tDF

Output Enable High

to Output Hi-Z

E = VIL

0 45 0 50 0 55 0 60 ns

tAXQX

tOH

Address Transition

to Output Transition

E = VIL, G = VIL

0

0

0

0

ns

Note: 1. Output Hi-Z is defined as the point at which data is no longer driven.

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