256K X 36, 512K X 18
3.3VSynchronousSRAMs
3.3V I/O, Burst Counter
IDT71V67603
IDT71V67803
PipelinedOutputs,SingleCycleDeselect
Features
256K x 36/512K x 18. The IDT71V67603/7803 SRAMs contain write,
data, address and control registers. Internal logic allows the SRAM to
generateaself-timedwritebaseduponadecisionwhichcanbeleftuntil
theendofthewritecycle.
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256K x 36, 512K x 18 memory configurations
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Supports high system speed:
– 166MHz 3.5ns clock access time
– 150MHz 3.8ns clock access time
– 133MHz 4.2ns clock access time
Theburstmodefeatureoffersthehighestlevelofperformancetothe
systemdesigner,astheIDT71V67603/7803canprovidefourcyclesof
dataforasingleaddresspresentedtotheSRAM. Aninternalburstaddress
counteracceptsthefirstcycleaddressfromtheprocessor,initiatingthe
accesssequence.Thefirstcycleofoutputdatawillbepipelinedforone
cycle before it is available on the next rising clock edge. If burst mode
operationisselected(ADV=LOW),thesubsequentthreecyclesofoutput
datawillbeavailabletotheuseronthenextthreerisingclockedges. The
orderofthesethreeaddressesaredefinedbytheinternalburstcounter
andthe LBO inputpin.
◆
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)
◆
3.3V core power supply
◆
Power down controlled by ZZ input
3.3V I/O supply (VDDQ)
Packaged in a JEDEC Standard 100-pin thin plastic quad
◆
◆
flatpack (TQFP), 119 ball grid array (BGA) and 165 fine pitch
ball grid array (fBGA).
The IDT71V67603/7803 SRAMs utilize IDT’s latest high-performance
CMOSprocessandarepackagedinaJEDECstandard14mmx20mm100-
pin thinplasticquadflatpack(TQFP), a119ballgridarray(BGA) and a 165
fine pitchballgridarray(fBGA).
Description
The IDT71V67603/7803 are high-speed SRAMs organized as
PinDescriptionSummary
A0-A18
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
Chip Selects
Output Enable
OE
Global Write Enable
Byte Write Enable
Individual Byte Write Selects
Clock
GW
BWE
(1)
BW1, BW2, BW3, 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, I/OP1-I/OP4
VDD, VDDQ
Data Input / Output
Core Power, I/O Power
Ground
Supply
Supply
VSS
N/A
5310 tbl 01
NOTE:
1. BW3 and BW4 are not applicable for the IDT71V67802.
FEBRUARY 2009
SEPTEMBER 2004
1
©2004IntegratedDeviceTechnology,Inc.
DSC-5310/06