AC ELECTRICAL CHARACTERISTICS
1
(Over Operating Range)
SYMBOL
PARAMETER
t
A
= 20 ns
MIN
t
A
= 25 ns
MIN
t
A
= 35 ns
MIN
t
A
= 50 ns
MIN
UNIT
MAX
MAX
MAX
MAX
READ CYCLE TIMING
30
–
10
20
5
10
5
–
t
RC
t
A
t
RR
t
RPW
t
RLZ
t
WLZ
t
DV
t
RHZ
Read Cycle Time
Access Time
Read Recovery Time
Read Pulse Width
2
Data Bus Active from Read LOW
3
Data Bus Active from Write HIGH
3,4
Data Held Valid from Read Pulse HIGH
Data Bus High-Z from Read HIGH
3
–
20
–
–
–
–
–
15
35
–
10
25
5
10
5
–
–
25
–
–
–
–
–
15
45
–
10
35
5
10
5
–
–
35
–
–
–
–
–
15
65
–
15
50
5
10
5
–
–
50
–
–
–
–
–
20
ns
ns
ns
ns
ns
ns
ns
ns
WRITE CYCLE TIMING
30
20
10
12
0
t
WC
t
WPW
t
WR
t
DS
t
DH
Write Cycle Time
Write Pulse Width
2
Write Recovery Time
Data Setup Time
Data Hold Time
–
–
–
–
–
35
25
10
15
0
–
–
–
–
–
45
35
10
18
0
–
–
–
–
–
65
50
15
30
0
–
–
–
–
–
ns
ns
ns
ns
ns
RESET TIMING
30
20
10
20
20
RETRANSMIT TIMING
5
30
20
10
FLAG TIMING
–
–
–
–
–
–
–
–
t
RSC
t
RS
t
RSR
t
RRSS
t
WRSS
Reset Cycle Time
Reset Pulse Width
2
Reset Recovery Time
Read HIGH to RS HIGH
Write HIGH to RS HIGH
–
–
–
–
–
35
25
10
25
25
–
–
–
–
–
45
35
10
35
35
–
–
–
–
–
65
50
15
50
50
–
–
–
–
–
ns
ns
ns
ns
ns
t
RTC
t
RT
t
RTR
Retransmit Cycle Time
Retransmit Pulse Width
2
Retransmit Recovery Time
–
–
–
35
25
10
–
–
–
45
35
10
–
–
–
65
50
15
–
–
–
ns
ns
ns
t
EFL
t
HFH,FFH
t
REF
t
RFF
t
WEF
t
WFF
t
WHF
t
RHF
Reset LOW to Empty Flag LOW
Reset LOW to Half-Full and Full Flags HIGH
Read LOW to Empty Flag LOW
Read HIGH to Full Flag HIGH
Write HIGH to Empty Flag HIGH
Write LOW to Full Flag LOW
Write LOW to Half-Full Flag LOW
Read HIGH to Half-Full Flag HIGH
30
30
20
20
20
20
20
20
–
–
–
–
–
–
–
–
35
35
25
25
25
25
25
25
–
–
–
–
–
–
–
–
45
45
35
35
35
35
35
35
–
–
–
–
–
–
–
–
65
65
45
45
45
45
45
45
ns
ns
ns
ns
ns
ns
ns
ns
EXPANSION TIMING
–
–
20
10
10
t
XOL
t
XOH
t
XI
t
XIR
t
XIS
Expansion Out LOW
Expansion Out HIGH
Expansion In Pulse Width
Expansion In Recovery Time
Expansion in Setup Time
20
20
–
–
–
–
–
25
10
10
25
25
–
–
–
–
–
35
10
15
35
35
–
–
–
–
–
50
10
15
50
50
–
–
–
ns
ns
ns
ns
ns
NOTES:
1.
All timing measurements are performed at ‘AC Test Condition’ levels.
2.
Pulse widths less than minimum value are not allowed.
3.
Values are guaranteed by design; not currently tested.
4.
Only applies to read-data flow-through mode.
5.
See also Note 2, Figure 19.
LH540204
CMOS 4096
×
9 Asynchronous FIFO
10