LH540203K-35 データシートの表示（PDF） - Sharp Electronics
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LH540203K-35 Datasheet PDF : 17 Pages
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LH540203
CMOS 2048 × 9 Asynchronous FIFO
AC ELECTRICAL CHARACTERISTICS 1 (Over Operating Range)
SYMBOL
PARAMETER
tA = 15 ns tA = 20 ns
MIN MAX MIN MAX
READ CYCLE TIMING
tRC
tA
tRR
tRPW
tRLZ
tWLZ
tDV
tRHZ
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 Valid from Read Pulse HIGH
Data Bus High-Z from Read HIGH 3
25 – 30 –
– 15 – 20
10 – 10 –
15 – 20 –
5–5–
10 – 10 –
5–5–
– 15 – 15
WRITE CYCLE TIMING
tWC
tWPW
tWR
tDS
tDH
Write Cycle Time
Write Pulse Width 2
Write Recovery Time
Data Setup Time
Data Hold Time
25 – 30 –
15 – 20 –
10 – 10 –
12 – 12 –
0–0–
tRSC
tRS
tRSR
tRRSS
tWRSS
Reset Cycle Time
Reset Pulse Width 2
Reset Recovery Time
Read HIGH to RS HIGH
Write HIGH to RS HIGH
RESET TIMING
25 – 30 –
15 – 20 –
10 – 10 –
15 – 20 –
15 – 20 –
RETRANSMIT TIMING 5
tRTC
Retransmit Cycle Time
tRT
Retransmit Pulse Width 2
tRTR
Retransmit Recovery Time
25 – 30 –
15 – 20 –
10 – 10 –
tEFL
tHFH,FFH
Reset LOW to Empty Flag LOW
Reset LOW to Half-Full and Full
Flags HIGH
FLAG TIMING
– 25 – 30
– 25 – 30
tREF
tRFF
tWEF
tWFF
tWHF
tRHF
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
– 15 – 20
– 15 – 20
– 15 – 20
– 15 – 20
– 15 – 20
– 15 – 20
EXPANSION TIMING
tXOL
Expansion Out LOW
tXOH
Expansion Out HIGH
tXI
Expansion In Pulse Width
tXIR
Expansion In Recovery Time
tXIS
Expansion in Setup Time
– 18 – 20
– 18 – 20
15 – 20 –
10 – 10 –
7 – 10 –
NOTES:
1. All timing measurements are performed at ‘AC Test Condition’ levels.
2. Pulse widths less than minimum value are not allowed.
tA = 25 ns
MIN MAX
35 –
– 25
10 –
25 –
5–
10 –
5–
– 15
35 –
25 –
10 –
12 –
0–
35 –
25 –
10 –
25 –
25 –
35 –
25 –
10 –
– 35
– 35
– 25
– 25
– 25
– 25
– 25
– 25
– 25
– 25
25 –
10 –
10 –
tA = 35 ns
MIN MAX
45 –
– 35
10 –
35 –
5–
10 –
5–
– 15
45 –
35 –
10 –
15 –
0–
45 –
35 –
10 –
35 –
35 –
45 –
35 –
10 –
– 45
– 45
– 35
– 35
– 35
– 35
– 35
– 35
– 35
– 35
35 –
10 –
15 –
tA = 50 ns UNIT
MIN MAX
65 – ns
– 50 ns
15 – ns
50 – ns
5 – ns
10 – ns
5 – ns
– 20 ns
65 – ns
50 – ns
15 – ns
20 – ns
0 – ns
65 – ns
50 – ns
15 – ns
50 – ns
50 – ns
65 – ns
50 – ns
15 – ns
– 65 ns
– 65 ns
– 45 ns
– 45 ns
– 45 ns
– 45 ns
– 45 ns
– 45 ns
– 50 ns
– 50 ns
50 – ns
10 – ns
15 – ns
10
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