IDT72801(2001) View Datasheet(PDF) - Integrated Device Technology
Part Name
Description
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IDT72801 Datasheet PDF : 16 Pages
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IDT72801/728211/72821/72831/72841/72851
Commercial And Industrial Temperature Range
RSA (RSB)
RENA1, RENA2
(RENB1, RENB2)
WENA1
(WENB1)
WENA2/LDA(1)
(WENB2/LDB)
EFA, PAEA
(EFB, PAEB)
FFA, PAFA
(FFB, PAFB)
QA0 - QA8
(QB0 - QB8)
tRS
tRSS
tRSS
tRSS
tRSF
tRSF
tRSF
tRSR
tRSR
tRSR
OEA (OEB) = 1(2)
OEA (OEB) = 0
NOTES:
1. Holding WENA2/LDA (WENB2/LDB) HIGH during reset will make the pin act as a second write enable pin. Holding WENA2/LDA (WENB2/LDB) LOW
during reset will make the pin act as a load enable for the programmable flag offset registers.
2. After reset, QA0 - QA8 (QB0 - QB8) will be LOW if OEA (OEB) = 0 and tri-state if OEA (OEB) = 1.
3. The clocks RCLKA, WCLKA (RCLKB, WCLKB) can be free-running during reset.
Figure 4. Reset Timing
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WCLKA (WCLKB)
DA0 - DA8
(DB0 - DB8)
WENA1
(WENB1)
WENA2 (WENB2)
(If Applicable)
FFA
(FFB)
tSKEW1(1)
RCLKA (RCLKB)
tCLKH
tCLK
tCLKL
tDS
DATA IN VALID
tENS
tENS
tWFF
tDH
tENH
tENH
tWFF
NO OPERATION
NO OPERATION
RENA1, RENA2
(RENB1, RENB2)
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NOTE:
1. tSKEW1 is the minimum time between a rising RCLKA (RCLKB) edge and a rising WCLKA (WCLKB) edge for FFA (FFB) to change during the current clock cycle. If the time between
the rising edge of RCLKA (RCLKB) and the rising edge of WCLKA (WCLKB) is less than tSKEW1, then FFA (FFB) may not change state until the next WCLKA (WCLKB) edge.
Figure 5. Write Cycle Timing
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