27C256-15/SO(2004) Просмотр технического описания (PDF) - Microchip Technology

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производитель

27C256-15/SO
(Rev.:2004)

256K (32K x 8) CMOS EPROM

Microchip Technology 

27C256

TABLE 1-3: READ OPERATION AC CHARACTERISTICS

AC Testing Waveform: VIH = 2.4V and VIL = 0.45V; VOH = 2.0V VOL = 0.8V

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

Automotive:

Tamb = -40°C to +125°C

Parameter

27C256-90* 27C256-10* 27C256-12 27C256-15 27C256-20

Sym

Units Conditions

Min Max Min Max Min Max Min Max Min Max

Address to Output tACC — 90 — 100 — 120 — 150 — 200

Delay

CE to Output Delay tCE — 90 — 100 — 120 — 150 — 200

OE to Output Delay tOE — 40 — 45 — 55 — 65 — 75

CE or OE to O/P

High Impedance

tOFF 0 30 0 30 0 35 0 50 0 55

Output Hold from tOH 0 — 0 — 0 — 0 — 0 —

Address CE or OE,

whichever goes first

* -10, -90 AC Testing Waveform: VIH = 2.4V and VIL = .45V; VOH = 1.5V and VOL = 1.5V

Output Load: 1 TTL Load + 30pF

ns CE=OE =VIL

ns OE = VIL

ns CE = VIL

ns

ns

FIGURE 1-1: READ WAVEFORMS

V IH

Address

V IL

V IH

CE

V IL

V IH

OE

V IL

Outputs

O0 - O7

VOH

VOL

High Z

Address Valid

t CE(2)

t OE(2)

t ACC

t OFF(1,3)

t OH

Valid Output

High Z

Notes: (1) t OFF is specified for OE or CE, whichever occurs first

(2) OE may be delayed up to t CE - t OE after the falling edge of CE without impact on t CE

(3) This parameter is sampled and is not 100% tested.

 2004 Microchip Technology Inc.

DS11001N-page 3

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