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© 2002 QuickLogic Corporation
www.quicklogic.com
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QL4058 QuickRAM Data Sheet Rev H
Table 4: RAM Cell Asynchronous Read Timing
Symbol
Parameter
Propagation Delays (ns)
Fanout
1
2
3
4
5
RPDRD
RA to RDa
a. Stated timing for worst case Propagation Delay over process variation at V
CC = 3.3 V and
TA = 25
°C. Multiply by the appropriate Delay Factor, K, for speed grade, voltage and temperature
settings as specified in the Operating Range.
3.0
3.3
3.6
3.9
5.1
Table 5: Input-Only / Clock Cells
Symbol
Parameter
Propagation Delays (ns)
Fanout
1
2
3
4
8
12
24
t
IN
High Drive Input Delay
1.5
1.6
1.8
1.9
2.4
2.9
4.4
t
INI
High Drive Input, Inverting Delay
1.6
1.7
.19
2.0
2.5
3.0
4.5
tISU
Input Register Set-Up Time
3.1
3.1
3.1
3.1
3.1
3.1
3.1
t
IH
Input Register Hold Time
0.0
0.0
0.0
0.0
0.0
0.0
0.0
t
ICLK
Input Register Clock To Q
0.7
0.8
1.0
1.1
1.6
2.1
3.6
tIRST
Input Register Reset Delay
0.6
0.7
0.9
1.0
1.5
2.0
3.5
t
IESU
Input Register Clock Enable Setup Time
2.3
2.3
2.3
2.3
2.3
2.3
2.3
t
IEH
Input Register Clock Enable Hold Time
0.0
0.0
0.0
0.0
0.0
0.0
0.0
Table 6: Clock Cells
Symbol
Parameter
Propagation Delays (ns)
Fanout
a
a. The array distributed networks consist of 40 half columns and the global distributed networks con-
sist of 44 half columns, each driven by an independent buffer. The number of half columns used
does not affect clock buffer delay. The array clock has up to eight loads per half column. The global
clock has up to 11 loads per half column.
1
2
3
4
8
10
11
t
ACK
Array Clock Delay
1.2
1.2
1.3
1.3
1.5
1.6
1.7
tGCKP
Global Clock Pin Delay
0.7
0.7
0.7
0.7
0.7
0.7
0.7
t
GCKB
Global Clock Buffer Delay
0.8
0.8
0.9
0.9
1.1
1.2
1.3