7

COMMERCIAL,INDUSTRIALANDMILITARY

TEMPERATURERANGES

IDT7203/7204/7205/7206/7207/7208 CMOS ASYNCHRONOUS FIFO

2,048 x 9, 4,096 x 9, 8,192 x 9, 16,384 x 9, 32,768 x 9 and 65,536 x 9

Figure 4. Full Flag Timing From Last Write to First Read

NOTE:

1. W and R = VIH around the rising edge of RS.

Figure 2. Reset

Figure 3. Asynchronous Write and Read Operation

W

RS

R

EF

HF, FF

tRSC

tRS

tRSS

tRSS

tRSR

tEFL

tHFH, tFFH

2661 drw04

R

W

D0-D8

tRC

tA

tWR

tDS

DATA

tDH

tWPW

tWC

VALID

tRHZ

tDV

tA

tRR

tRPW

IN

VALID

DATA OUT

VALID

DATA OUT

DATA IN VALID

2661 drw05

Q0-Q8

tRLZ

R

W

FF

tRFF

tWFF

FIRST READ

IGNORED

WRITE

LAST WRITE

2661 drw06