D a t a S h e e t
AC Characteristics
Asynchronous Read
Parameter
D3, D4
D8, D9
C3, C4
C8, C9
JEDEC Standard Description
(54 MHz)
(40 MHz)
Unit
ns
tCE
tACC
Access Time from CE# Low
Max
Max
Min
70
70
90
90
Asynchronous Access Time (Note 1)
AVD# Low Time
ns
tAVDP
tAAVDS
tAAVDH
tOE
12
5
ns
Address Setup Time to Rising Edge of AVD
Address Hold Time from Rising Edge of AVD
Output Enable to Output Valid
Min
Min
Max
Min
ns
7
ns
13.5
10
20
ns
Read
0
ns
Output Enable Hold
Time
tOEH
Toggle and
Data# Polling
Min
10
ns
tOEZ
tCAS
Output Enable to High Z (Note 2)
CE# Setup Time to AVD#
Max
Min
10.5
ns
ns
0
Notes:
1. Asynchronous Access Time is from the last of either stable addresses or the falling edge of AVD#.
2. Not 100% tested.
CE#
tOE
OE#
tOEH
WE#
tCE
tOEZ
DQ15-DQ0
Valid RD
tACC
RA
A20-A0
AVD#
tAAVDH
tCAS
tAVDP
tAAVDS
Note: RA = Read Address, RD = Read Data.
Figure 18. Asynchronous Mode Read with Latched Addresses
54
Am29BDS320G
27243B2 May 15, 2007
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