CMOS ASYNCHRONOUS FIFO
256 x 9, 512 x 9 and 1,024 x 9
IDT7200L
IDT7201LA
IDT7202LA
FEATURES:
DESCRIPTION:
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First-In/First-Out dual-port memory
256 x 9 organization (IDT7200)
512 x 9 organization (IDT7201)
1,024 x 9 organization (IDT7202)
Low power consumption
TheIDT7200/7201/7202aredual-portmemoriesthatloadandemptydata
onafirst-in/first-outbasis. ThedevicesuseFullandEmptyflagstopreventdata
overflowandunderflowandexpansionlogictoallowforunlimitedexpansion
capabilityinbothwordsizeanddepth.
The reads and writes are internally sequential through the use of ring
pointers,withnoaddressinformationrequiredtoloadandunloaddata. Data
istoggledinandoutofthedevicesthroughtheuseoftheWrite(W)andRead
(R) pins.
Thedevicesutilizea9-bitwidedataarraytoallowforcontrolandparitybits
attheuser’soption. Thisfeatureisespeciallyusefulindatacommunications
applicationswhereitisnecessarytouseaparitybitfortransmission/reception
errorchecking. ItalsofeaturesaRetransmit(RT)capabilitythatallowsforreset
of the read pointer to its initial position when RT is pulsed LOW to allow for
retransmissionfromthebeginningofdata. AHalf-FullFlagisavailableinthe
singledevicemodeandwidthexpansionmodes.
— Active: 440mW (max.)
—Power-down: 28mW (max.)
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Ultra high speed—12ns access time
Asynchronous and simultaneous read and write
Fully expandable by both word depth and/or bit width
Pin and functionally compatible with 720X family
Status Flags: Empty, Half-Full, Full
Auto-retransmit capability
High-performance CEMOS™ technology
Military product compliant to MIL-STD-883, Class B
Standard Military Drawing #5962-87531, 5962-89666, 5962-89863
and 5962-89536 are listed on this function
TheseFIFOs arefabricatedusingIDT’s high-speedCMOStechnology.
They are designed for those applications requiring asynchronous and
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Dual versions available in the TSSOP package. For more informa- simultaneous read/writes in multiprocessing and rate buffer applications.
tion, see IDT7280/7281/7282 data sheet
IDT7280 = 2 x IDT7200
Militarygradeproductismanufacturedincompliancewiththelatestrevisionof
MIL-STD-883, Class B.
IDT7281 = 2 x IDT7201
IDT7282 = 2 x IDT7202
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Industrial temperature range (–40oC to +85oC) is available
(plastic packages only)
FUNCTIONAL BLOCK DIAGRAM
DATA INPUTS
(D0-D8)
WRITE
CONTROL
W
RAM
ARRAY
256 x 9
WRITE
POINTER
READ
POINTER
512 x 9
1,024 x 9
THREE-
STATE
BUFFERS
RS
DATA OUTPUTS
READ
(Q0-Q8)
RESET
LOGIC
R
CONTROL
FLAG
LOGIC
EF
FF
FL/RT
EXPANSION
LOGIC
2679 drw 01
XO/HF
XI
IDTandtheIDTlogoareregisteredtrademarksofIntegratedDeviceTechnology,Inc.
SEPTEMBER 2002
COMMERCIAL, INDUSTRIAL AND MILITARY TEMPERATURE RANGES
1
2002 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
DSC-2679/9