27C64 Просмотр технического описания (PDF) - Microchip Technology

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27C64

64K (8K x 8) CMOS EPROM

Microchip Technology 

27C64

TABLE 1-3: READ OPERATION AC CHARACTERISTICS

AC Testing Waveform:

Output Load:

Input Rise and Fall Times:

Ambient Temperature:

VIH = 2.4V and VIL = 0.45V; VOH = 2.0V VOL = 0.8V

1 TTL Load + 100 pF

10 ns

Commercial:

Tamb = 0°C to +70°C

Industrial:

Tamb = -40°C to +85°C

Parameter

27C64-12 27C64-15 27C64-17 27C64-20 27C64-25

Sym

Units

Min Max Min Max Min Max Min Max Min Max

Conditions

Address to Output Delay tACC — 120 — 150 — 170 — 200 — 250

CE to Output Delay

tCE — 120 — 150 — 170 — 200 — 250

OE to Output Delay

tOE — 65 — 70 — 70 — 75 — 100

CE or OE to O/P High

Impedance

tOFF 0 50 0 50 0 50 0 55 0 60

Output Hold from

Address CE or OE,

whichever occurs first

tOH 0 — 0 — 0 — 0 — 0 —

ns CE = OE = VIL

ns OE = VIL

ns CE = VIL

ns

ns

FIGURE 1-1: READ WAVEFORMS

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.

 2004 Microchip Technology Inc.

DS11107M-page 3

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