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72271LA15TFG8 Datasheet(PDF) 2 Page - Integrated Device Technology

Part # 72271LA15TFG8
Description  CMOS SuperSync FIFO
Download  27 Pages
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

72271LA15TFG8 Datasheet(HTML) 2 Page - Integrated Device Technology

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COMMERCIALANDINDUSTRIAL
TEMPERATURERANGES
IDT72261LA/72271LA SuperSync FIFO™
16,384 x 9 and 32,768 x 9
PIN CONFIGURATIONS
TQFP (PN64-1, ORDER CODE: PF)
STQFP (PP64-1, ORDER CODE: TF)
TOP VIEW
DESCRIPTION (CONTINUED)
PIN 1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
WEN
SEN
DC(1)
VCC
VCC
GND(2)
GND(2)
GND(2)
GND(2)
GND(2)
GND(2)
GND(2)
GND(2)
GND(2)
D8
D7
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
DNC(3)
DNC(3)
GND
DNC(3)
DNC(3)
VCC
DNC(3)
DNC(3)
DNC(3)
GND
DNC(3)
DNC(3)
Q8
Q7
Q6
GND
4671 drw 02
NOTES:
1. DC = Don’t Care. Must be tied to GND or VCC, cannot be left open.
2. This pin may either be tied to ground or left open.
3. DNC = Do Not Connect.
SuperSyncFIFOsareparticularlyappropriatefornetwork,video,telecom-
munications,datacommunicationsandotherapplicationsthatneedtobuffer
largeamountsofdata.
TheinputportiscontrolledbyaWriteClock(WCLK)inputandaWriteEnable
(WEN)input. DataiswrittenintotheFIFOoneveryrisingedgeofWCLKwhen
WEN isasserted.TheoutputportiscontrolledbyaReadClock(RCLK)input
and Read Enable (REN) input. Data is read from the FIFO on every rising
edgeofRCLKwhenRENisasserted. AnOutputEnable(OE)inputisprovided
forthree-statecontroloftheoutputs.
The frequencies of both the RCLK and the WCLK signals may vary from 0
to fMAX with complete independence. There are no restrictions on the
frequency of one clock input with respect to the other.
There are two possible timing modes of operation with these devices:
IDT Standard mode and First Word Fall Through (FWFT) mode.
In IDT Standard mode, the first word written to an empty FIFO will not
appear on the data output lines unless a specific read operation is
performed. Areadoperation,whichconsistsof activatingREN and enabling
arisingRCLKedge,willshiftthewordfrominternalmemorytothedataoutput
lines.


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