AMD27C64 datasheet(9/11 Pages) AMD

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AMD

2-18

Am27C64

CAPACITANCE

Parameter

Test

Symbol

Parameter Description

Conditions

Typ

Max

Typ

Max

Typ

Max

Unit

CIN

Input Capacitance

VIN = 0

COUT

Output Capacitance

VOUT = 0

Notes:

1. This parameter is only sampled and not 100% tested.

2. TA = +25

°C, f = 1 MHz.

CDV028

PL 032

PD 028

SWITCHING CHARACTERISTICS over operating range unless otherwise specified

(Notes 1, 3 and 4)

Parameter

Test

JEDEC

Standard Description

Conditions

-45

-55

-70

-90

-120

-150

-200

-255

Unit

tAVQV

tACC

Address to

CE = OE = Min

–

––––

Output Delay

VIL

Max

120

150

200

250

tELQV

tCE

Chip Enable to

OE = VIL

Min

–

––––

Output Delay

Max

120

150

200

250

tGLQV

tOE

Output Enable to

CE = VIL

Min

–

––––

Output Delay

Max

tEHQZ

tDF

Min

–

––––

tGHQZ

(Note 2)

Max

tAXQX

tOH

Output Hold from

Min

0000

Addresses,

CE,or OE,

Max

–

––––

whichever occurred first

Parameter

Symbols

Am27C64

Notes:

1. VCC must be applied simultaneously or before VPP, and removed simultaneously or after VPP.

2. This parameter is only sampled and not 100% tested.

3. Caution: The Am27C64 must not be removed from (or inserted into) a socket or board when VPP or VCC is applied.

4. For the -45, -55 and -70:

Output Load: 1 TTL gate and CL = 30 pF

Input Rise and Fall Times: 20 ns

Input Pulse Levels: 0 V to 3 V

Timing Measurement Reference Level: 1.5 V for inputs and outputs

For all other versions:

Output Load: 1 TTL gate and CL = 100 pF

Input Rise and Fall Times: 20 ns

Input Pulse Levels: 0.45 V to 2.4 V

Timing Measurement Reference Level: 0.8 V and 2 V inputs and outputs

Chip Enable HIGH or

Output Enable HIGH,

whichever comes

first, to Output Float

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