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Ac waveforms for read operation, Input test waveforms and measurement levels, Output test load – Rainbow Electronics AT27C2048 User Manual

Page 5: Pin capacitance

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AT27C2048

5

AC Waveforms for Read Operation

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Notes:

1.

Timing measurement references are 0.8V and 2.0V. Input AC drive levels are 0.45V and 2.4V, unless otherwise specified.

2.

OE may be delayed up to t

CE

- t

OE

after the falling edge of CE without impact on t

CE

.

3.

OE may be delayed up to t

ACC

- t

OE

after the address is valid without impact on t

ACC

.

4.

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

5.

Output float is defined as the point when data is no longer driven.

Input Test Waveforms and
Measurement Levels

For -55 devices only:

t

R

, t

F

< 5 ns (10% to 90%)

For -70, -90, -12 and -15 devices:

t

R

, t

F

< 20 ns (10% to 90%)

Output Test Load

Note:

CL = 100 pF including jig capacitance, except for the -55
devices, where CL = 30 pF.

Note:

1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.

Pin Capacitance

f = 1 MHz, T = 25°C

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Symbol

Typ

Max

Units

Conditions

C

IN

4

10

pF

V

IN

= 0V

C

OUT

8

12

pF

V

OUT

= 0V