M28256 データシートの表示（PDF） - STMicroelectronics

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M28256

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

STMicroelectronics 

M28256

Table 8B. Read Mode AC Characteristics for M28256-W (3V range)

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

Symbol Alt.

Parameter

Test

Conditi

on

-12

Min Max

M28256-W

-15

-20

Min Max Min Max

-25

Min Max

Unit

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

tEHQZ1 tDF Chip Enable High to Output Hi-Z G = VIL 0 45 0 50 0 55 0 60 ns

tGHQZ1 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.

Figure 9. Read Mode AC Waveforms (with Write Enable, W, high)

A0-A14

E

G

DQ0-DQ7

Note: 1. Write Enable (W) = VIH

tAVQV

VALID

tAXQX

tGLQV

tEHQZ

tELQV

DATA OUT

tGHQZ

Hi-Z

AI01700

9/20

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