AM28F256A-70PCB View Datasheet(PDF) - Advanced Micro Devices

Part Name

Description

MFG CO.

AM28F256A-70PCB

256 Kilobit (32 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory with Embedded Algorithms

Advanced Micro Devices 

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KEY TO SWITCHING WAVEFORMS

WAVEFORM

INPUTS

Steady

OUTPUTS

Changing from H to L

Changing from L to H

Don’t Care, Any Change Permitted

Changing, State Unknown

Does Not Apply

Center Line is High Impedance State (High Z)

SWITCHING WAVEFORMS

Device and

Power-up, Standby Address Selection

Outputs

Enabled

Data

Valid

Addresses

Addresses Stable

tAVAV (tRC)

CE#

OE# (G#)

tWHGL

Standby, Power-down

tEHQZ

(tDF)

tGHQZ

(tDF)

WE# (W#)

tVCS

Data (DQ)

High Z

5.0 V

VCC

0V

tGLQV (tOE)

tELQV (tCE)

tGLQX (tOLZ)

tAXQX (tOH)

tELQX (tLZ)

Output Valid

tAVQV (tACC)

Figure 9. AC Waveforms for Read Operations

High Z

18879C-18

26

Am28F256A

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