
6
COMMERCIALTEMPERATURERANGE
IDT7280/7281/7282/7283/7284/7285 5V ASYNCHRONOUS FIFO
DUAL 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 x 9
JUNE 29, 2012
Figure 5. Empty Flag From Last Read to First Write
Figure 8. Minimum Timing for a Full Flag Coincident Write Pulse
Figure 7. Minimum Timing for an Empty Flag Coincident Read Pulse
Figure 6. Retransmit
LAST READ
R
IGNORED
READ
FIRST WRITE
ADDITIONAL
WRITES
FIRST
READ
W
EF
tWEF
3208 drw 07
VALID
t A
DATA OUT
REF
t
tRTC
tRT
tRTS
RT
W,R
HF, EF, FF
tRTR
FLAG VALID
3208 drw 08
RTF
t
EF
W
R
tWEF
tRPE
3208 drw 09
FF
R
W
tRFF
tWPF
3208 drw 10