27C512A_04 datasheet(3/10 Pages) MICROCHIP

3 / 10 page

 2004 Microchip Technology Inc.

DS11173G-page 3

27C512A

TABLE 1-3:

READ OPERATION AC CHARACTERISTICS

FIGURE 1-1:

READ WAVEFORMS

AC Testing Waveform:

VIH = 2.4V and VIL = .45V; VOH = 2.0V and 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

Extended (Automotive):

Tamb = -40°C to +125°C

Parameter

Sym

27C512-90*

27C512-10*

27C512-12

27C512-15

Units Conditions

Min

Max

Min

Max

Min

Max

Min

Max

Address to Output

Delay

tACC

—

100

—

120

—

150

CE = OE/

VPP = VIL

CE to Output Delay

tCE

—

100

—

120

—

150

OE/VPP =

VIL

OE to Output Delay

tOE

—

CE = VIL

OE to Output High

Impedance

tOFF

035035040045

Output Hold from

Address, CE or OE/

VPP, whichever

occurred first

tOH

0—

*90/10 AC Testing Waveforms: VIH = 3.0V and VIL = 0V; VOH = 1.5V and VOL = 1.5V

Output Load: 1 TTL Load + 30 pF

Address

VIH

VIL

VIH

VIL

VIH

VIL

Outputs

O0 - O7

VOH

VOL

Address Valid

tCE(2)

tOE(2)

High Z

Valid Output

tACC

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

(2) OE may be delayed up to t

- t OE after the falling edge of CE without impact on t

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

High Z

tOH

tOFF(1,3)

Notes:

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