IDT7203/7204/7205/7206/7207/7208CMOSASYNCHRONOUSFIFO
2,048 x 9, 4,096 x 9, 8,192 x 9, 16,384 x 9, 32,768 x 9, 65,536 x 9
COMMERCIAL,INDUSTRIALANDMILITARY
TEMPERATURERANGES
IGNORED
READ
LAST READ
FIRST WRITE
W
R
tWEF
t
REF
EF
tA
OUT
VALID
Figure 5. Empty Flag Timing From Last Read to First Write
DATA
2661 drw07
t
RTC
tRT
RT
t
RTS
tRTR
W,R
t
RTF
FLAG VALID
HF, EF, FF
2661 drw08
NOTE:
1. EF, FF and HF may change status during Retransmit, but flags will be valid at tRTC.
Figure 6. Retransmit
W
tWEF
EF
R
tRPE
2661 drw09
Figure 7. Minimum Timing for an Empty Flag Coincident Read Pulse.
R
t
RFF
FF
W
tWPF
2661 drw10
Figure 8. Minimum Timing for a Full Flag Coincident Write Pulse.
8
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
