 2004 Microchip Technology Inc.

DS11107M-page 3

27C64

TABLE 1-3:

READ OPERATION AC CHARACTERISTICS

FIGURE 1-1:

READ WAVEFORMS

AC Testing Waveform:

Output Load:

1 TTL Load + 100 pF

Input Rise and Fall Times:

10 ns

Ambient Temperature:

Commercial:

Tamb =

0°C to +70°C

Industrial:

Tamb = -40°C to +85°C

Parameter

Sym

27C64-12

27C64-15

27C64-17

27C64-20

27C64-25

Units

Conditions

MinMax MinMax MinMax MinMax MinMax

Address to Output Delay

—

120

—

150

—

170

—

200

—

250

ns

CE to Output Delay

—

120

—

150

—

170

—

200

—

250

ns

OE to Output Delay

—

65

—

70

—

70

—

75

—

100

ns

CE or OE to O/P High

Impedance

0

500500500550

60

ns

Output Hold from

Address CE or OE,

whichever occurs first

0—0—0—0—

0—

ns

Note 1:

tOFF is specified for OE or CE, whichever occurs first.

2: OE may be delayed up to tCE - tOE after the falling edge of CE without impact on tCE.

3: This parameter is sampled and is not 100% tested.