LH540215 datasheet(32/48 Pages) SHARP

Part #	LH540215

Description	512 x 18 / 1024 x 18 Synchronous FIFO

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Manufacturer	SHARP [Sharp Corporation]

Direct Link	http://sharp-world.com/

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32 / 48 page

540215-24

Q0 - Q17

REN

RCLK

PAF

OE

WEN

D0 - D17

WCLK

DATA WRITE

DATA READ

LOW

DATA IN

OUTPUT REGISTER

NO WRITE

tSKEW1(1)

tDS

tSKEW1(1)

tPAFS

tENS

tENH

tENS

tENH

tA

NO WRITE

NOTES:

1. tSKEW1 is the minimum time between a rising RCLK edge and a

rising WCLK edge for PAF to change predictably during the current

clock cycle. If the time between the rising edge of RCLK and the

rising edge of WCLK is less than tSKEW1, then it is not guaranteed

that PAF will change state until the next following WCLK edge.

2. PAF offset = p. Number of data words written into FIFO already = 511 - p

for the LH540215 and 1023 - p for the LH540225.

3. The internal state of the FIFO:

At

, 511 - p words in FIFO for LH540215 and 1023 - p words in FIFO for LH540225.

At

, 512 - p words in FIFO for LH540215 and 1024 - p words in FIFO for LH540225.

At

, again, 511 - p words in FIFO for LH540215 and 1023 - p words in FIFO for LH540225.

Enhanced Operating Mode Timing Diagram

A

B

C

A

C

B

Figure 17. Programmable-Almost-Full-Flag Timing,

When Synchronous (Enhanced Operating Mode)

TIMING DIAGRAMS (cont’d)

LH540215/25

512 x 18/1024 x 18 Synchronous FIFO

32

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Manufacturer	Part #	Datasheet	Description
Integrated Device Techn...	IDT72511	434Kb / 28P	PARALLEL BIDIRECTIONAL FIFO 512 x 18 & 1024 x 18
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Sharp Corporation	LH543611	475Kb / 57P	512 x 36 x 2 / 1024 x 36 x 2 Synchronous Bidirectional FIFO
Texas Instruments	SN74V215	590Kb / 43P	[Old version datasheet] 512 X 18, 1024 X 18, 2048 X 18, 4096 X 18 DSP-SYNC FIRST-IN, FIRST-OUT MEMORIES
	SN74V215	600Kb / 43P	[Old version datasheet] 512 X 18, 1024 X 18, 2048 X 18, 4096 X 18 DSP-SYNC FIRST-IN, FIRST-OUT MEMORIES
	SN74V215	555Kb / 40P	[Old version datasheet] 512 X 18, 1024 X 18, 2048 X 18, 4096 X 18 DSP-SYNC FIRST-IN, FIRST-OUT MEMORIES
Sharp Corporation	LH543620	269Kb / 38P	1024 x 36 Synchronous FIFO
Integrated Device Techn...	IDT72V205	214Kb / 25P	3.3 VOLT CMOS SyncFIFO 256 x 18, 512 x 18, 1,024 x 18, 2,048 x 18, and 4,096 x 18
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LH540215 Datasheet(PDF) 32 Page - Sharp Corporation

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