IDT723624/723634/723644CMOSSyncBiFIFO™WITHBUS-MATCHING
256 x 36 x 2, 512 x 36 x 2, 1,024 x 36 x 2
COMMERCIALTEMPERATURERANGE
TIMING REQUIREMENTS OVER RECOMMENDED RANGES OF SUPPLY
VOLTAGE AND OPERATING FREE-AIR TEMPERATURE
(Commercial: VCC = 5V ± 10%, TA = 0°C to +70°C)
Commercial
IDT723624L15
IDT723634L15
IDT723644L15
Symbol
fS
Parameter
Min.
—
15
6
Max.
66.7
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Clock Frequency, CLKA or CLKB
tCLK
Clock Cycle Time, CLKA or CLKB
tCLKH
tCLKL
tDS
Pulse Duration, CLKA or CLKB HIGH
Pulse Duration, CLKA and CLKB LOW
6
Setup Time, A0-A35 before CLKA↑ and B0-B35 before CLKB↑
Setup Time, CSA and W/RA before CLKA↑; CSB and W/RB before CLKB↑
Setup Time ENA and MBA before CLKA↑; ENB and MBB before CLKB↑
Setup Time, MRS1, MRS2, PRS1, or PRS2 LOW before CLKA↑ or CLKB↑
Setup Time, FS0 and FS1 before MRS1 and MRS2 HIGH
Setup Time, BE/FWFT before MRS1 and MRS2 HIGH
Setup Time, SPM before MRS1 and MRS2 HIGH
SetupTime, FS0/SDbeforeCLKA↑
4
tENS1
tENS2
tRSTS
tFSS
4.5
4.5
5
(1)
7.5
7.5
7.5
4
tBES
tSPMS
tSDS
tSENS
tFWS
tDH
SetupTime, FS1/SENbeforeCLKA↑
4
Setup Time, BE/FWFT before CLKA↑
0
Hold Time, A0-A35 after CLKA↑ and B0-B35 after CLKB↑
1
tENH
tRSTH
tFSH
Hold Time, CSA, W/RA, ENA, and MBA after CLKA↑; CSB, W/RB, ENB, and MBB after CLKB↑
1
(1)
Hold Time, MRS1, MRS2, PRS1 or PRS2 LOW after CLKA↑ or CLKB↑
4
Hold Time, FS0 and FS1 after MRS1 and MRS2 HIGH
Hold Time, BE/FWFT after MRS1 and MRS2 HIGH
Hold Time, SPM after MRS1 and MRS2 HIGH
Hold Time, FS0/SD after CLKA↑
2
tBEH
2
tSPMH
tSDH
2
1
tSENH
tSPH
Hold Time, FS1/SEN HIGH after CLKA↑
1
Hold Time, FS1/SEN HIGH after MRS1 and MRS2 HIGH
2
tSKEW1(2) Skew Time between CLKA↑ and CLKB↑ for EFA/ORA, EFB/ORB, FFA/IRA, and FFB/IRB
tSKEW2(2,3) Skew Time between CLKA↑ and CLKB↑ for AEA, AEB, AFA, and AFB
7.5
12
NOTES:
1. Requirement to count the clock edge as one of at least four needed to reset a FIFO.
2. Skew time is not a timing constraint for proper device operation and is only included to illustrate the timing relationship between CLKA cycle and CLKB cycle.
3. Design simulated, not tested.
8