LH540202K-20 View Datasheet(PDF) - Sharp Electronics

Part Name

Description

MFG CO.

LH540202K-20

CMOS 1024 × 9 Asynchronous FIFO

Sharp Electronics 

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LH540202

CMOS 1024 × 9 Asynchronous FIFO

AC ELECTRICAL CHARACTERISTICS 1 (Over Operating Range)

SYMBOL

PARAMETER

tA = 15 ns

tA = 20 ns

tA = 25 ns

tA = 35 ns

tA = 50 ns UNIT

MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX

READ CYCLE TIMING

tRC

Read Cycle Time

25 – 30 – 35 – 45 – 65 – ns

tA

Access Time

– 15 – 20 – 25 – 35 – 50 ns

tRR

tRPW

tRLZ

tWLZ

Read Recovery Time

10 – 10 – 10 – 10 – 15 – ns

Read Pulse Width 2

15 – 20 – 25 – 35 – 50 – ns

Data Bus Active from Read LOW 3

5 – 5 – 5 – 5 – 5 – ns

Data Bus Active from Write HIGH 3,4 10 – 10 – 10 – 10 – 10 – ns

tDV

Data Valid from Read Pulse HIGH

5 – 5 – 5 – 5 – 5 – ns

tRHZ

Data Bus High-Z from Read HIGH 3

– 15 – 15 –

15 – 15 – 20 ns

WRITE CYCLE TIMING

tWC

tWPW

Write Cycle Time

Write Pulse Width 2

25 – 30 – 35 – 45 – 65 – ns

15 – 20 – 25 – 35 – 50 – ns

tWR

Write Recovery Time

10 – 10 – 10 – 10 – 15 – ns

tDS

Data Setup Time

10 – 10 – 10 – 15 – 20 – ns

tDH

Data Hold Time

0 – 0 – 0 – 0 – 0 – ns

RESET TIMING

tRSC

Reset Cycle Time

tRS

Reset Pulse Width 2

25 – 30 – 35 – 45 – 65 – ns

15 – 20 – 25 – 35 – 50 – ns

tRSR

Reset Recovery Time

10 – 10 – 10 – 10 – 15 – ns

tRRSS

Read HIGH to RS HIGH

15 – 20 – 25 – 35 – 50 – ns

tWRSS

Write HIGH to RS HIGH

15 – 20 – 25 – 35 – 50 – ns

RETRANSMIT TIMING 5

tRTC

Retransmit Cycle Time

tRT

Retransmit Pulse Width 2

25 – 30 – 35 – 45 – 65 – ns

15 – 20 – 25 – 35 – 50 – ns

tRTR

Retransmit Recovery Time

10 – 10 – 10 – 10 – 15 – ns

FLAG TIMING

tEFL

Reset LOW to Empty Flag LOW

– 25 – 30 – 35 – 45 – 65 ns

tHFH,FFH

Reset LOW to Half-Full and Full

Flags HIGH

– 25 – 30 – 35 – 45 – 65 ns

tREF

Read LOW to Empty Flag LOW

– 15 – 20 – 25 – 35 – 45 ns

tRFF

Read HIGH to Full Flag HIGH

– 15 – 20 – 25 – 35 – 45 ns

tWEF

Write HIGH to Empty Flag HIGH

– 15 – 20 – 25 – 35 – 45 ns

tWFF

Write LOW to Full Flag LOW

– 15 – 20 – 25 – 35 – 45 ns

tWHF

Write LOW to Half-Full Flag LOW

– 15 – 20 – 25 – 35 – 45 ns

tRHF

Read HIGH to Half-Full Flag HIGH

– 15 – 20 – 25 – 35 – 45 ns

EXPANSION TIMING

tXOL

Expansion Out LOW

– 18 – 20 – 25 – 35 – 50 ns

tXOH

Expansion Out HIGH

– 18 – 20 – 25 – 35 – 50 ns

tXI

Expansion In Pulse Width

15 – 20 – 25 – 35 – 50 – ns

tXIR

Expansion In Recovery Time

10 – 10 – 10 – 10 – 10 – ns

tXIS

Expansion in Setup Time

7 – 10 – 10 – 15 – 15 – ns

NOTES:

1. All timing measurements are performed at ‘AC Test Condition’ levels.

2. Pulse widths less than minimum value are not allowed.

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