IDT71V433
32K x 32
3.3V Synchronous SRAM
Flow-Through Outputs
Features
◆
32K x 32 memory configuration
The IDT71V433 SRAM contains write, data-input, address and
controlregisters.Therearenoregisters inthedataoutputpath(flow-
througharchitecture). Internallogicallows the SRAMtogenerate a
self-timed write based upon a decision which can be left until the
extreme end of the write cycle.
The burstmode feature offers the highestlevelofperformance to
thesystemdesigner,astheIDT71V433canprovidefourcyclesofdata
forasingleaddresspresentedtotheSRAM. Aninternalburstaddress
counteracceptsthefirstcycleaddressfromtheprocessor,initiatingthe
access sequence.Thefirstcycleofoutputdatawillflow-throughfrom
the arrayaftera clock-to-data access time delayfromthe risingclock
edgeofthesamecycle. Ifburstmodeoperationisselected(ADV=LOW),
the subsequent three cycles of output data will be available to the
user on the next three rising clock edges. The order of these three
addresses willbe definedbythe internalburstcounterandthe LBO
inputpin.
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Supports high performance system speed:
CommercialandIndustrial:
— 11 11ns Clock-to-DataAccess (50MHz)
— 12 12ns Clock-to-DataAccess (50MHz)
LBO input selects interleaved or linear burst mode
◆
◆
Self-timed write cycle with global write control (GW), byte
write enable (BWE), and byte writes (BWx)
Power down controlled by ZZ input
Single 3.3V power supply (+10/-5%)
Packaged in a JEDEC Standard 100-pin rectangular plastic
◆
◆
◆
thin quad flatpack (TQFP).
Description
The IDT71V433 is a 3.3V high-speed 1,048,576-bit SRAM orga-
nized as 32K x 32 with full support of various processor interfaces
includingthePentium™andPowerPC™.Theflow-throughburstarchi-
tectureprovidescost-effective2-1-1-1performanceforprocessorsupto
50MHz.
The IDT71V433 SRAM utilizes IDT's high-performance 3.3V
CMOSprocess,andispackagedinaJEDECStandard14mmx20mm
100-pinthinplasticquadflatpack(TQFP).
PinDescription
A0–A14
Address Inputs
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
I/O
Synchronous
Synchronous
Synchronous
Asynchronous
Synchronous
Synchronous
Synchronous
N/A
Chip Enable
CE
CS0, CS1
OE
Chips Selects
Output Enable
Global Write Enable
Byte Write Enable
GW
BWE
Individual Byte Write Selects
Clock Input
BW1–BW4
CLK
Burst Address Advance
Address Status (Cache Controller)
Address Status (Processor)
Linear / Interleaved Burst Order
Sleep Mode
Synchronous
Synchronous
Synchronous
DC
ADV
ADSC
ADSP
LBO
ZZ
Asynchronous
Synchronous
N/A
I/O0–I/O31
VDD, VDDQ
VSS, VSSQ
Data Input/Output
Core and I/O Power Supply (3.3V)
Array Ground, I/O Ground
Power
Power
N/A
3729 tbl 01
PentiumisatrademarkofIntelCorp.
PowerPCisatrademarkofInternationalBusinessMachines,Inc.
AUGUST 2001
1
DSC-3729/04
©2000IntegratedDeviceTechnology,Inc.