8

COMMERCIAL,INDUSTRIALANDMILITARY

TEMPERATURERANGES

IDT7201L/7201LA/7202LA CMOS ASYNCHRONOUS FIFO

256 x 9, 512 x 9 and 1,024 x 9

LAST READ

R

IGNORED

READ

FIRST WRITE

ADDITIONAL

WRITES

W

EF

VALID

DATA OUT

2679 drw 07

FIRST READ

VALID

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

RT

W,R

HF, EF, FF

FLAG VALID

2679 drw 08

EF

W

R

2679 drw 09

FF

R

W

2679 drw 10