参数资料
型号: 72821L15TF8
厂商: INTEGRATED DEVICE TECHNOLOGY INC
元件分类: FIFO
英文描述: 1K X 9 BI-DIRECTIONAL FIFO, 10 ns, PQFP64
封装: SLIM, TQFP-64
文件页数: 16/16页
文件大小: 211K
代理商: 72821L15TF8
9
IDT72801/728211/72821/72831/72841/72851 DUAL CMOS SyncFIFOTM
DUAL 256 x 9, DUAL 512 x 9, DUAL 1K x 9, DUAL 2K x 9, DUAL 4K x 9, DUAL 8K x 9
COMMERCIAL AND INDUSTRIAL
TEMPERATURERANGES
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
tRS
tRSR
RSA (RSB)
RENA1, RENA2
(
RENB1, RENB2)
tRSF
OEA (OEB) = 1
OEA (OEB) = 0
(2)
EFA, PAEA
(
EFB, PAEB)
FFA, PAFA
(
FFB, PAFB)
QA0 - QA8
(QB0 - QB8)
3034 drw 05
WENA1
(
WENB1)
tRSS
tRSF
tRSR
tRSS
tRSR
tRSS
WENA2/
LDA
(WENB2/
LDB)
(1)
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
tDH
tENH
tSKEW1(1)
tCLK
tCLKH
tCLKL
tDS
tENS
tWFF
WCLKA (WCLKB)
DA0 - DA8
(DB0 - DB8)
WENA1
(
WENB1)
WENA2 (WENB2)
(If Applicable)
FFA
(
FFB)
RCLKA (RCLKB)
RENA1, RENA2
(
RENB1, RENB2)
NO OPERATION
3034 drw 06
DATA IN VALID
tENS
tENH
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