COMMERCIALANDINDUSTRIAL

TEMPERATURERANGES

IDT72281/72291

CMOS SuperSync FIFO™ 65,536 x 9 and 131,072 x 9

8

NOTES:

1. n = Empty Offset, Default Values: n = 127 when parallel offset loading is selected or n = 1,023 when serial offset loading is selected.

2. m = Full Offset, Default Values: m = 127 when parallel offset loading is selected or m = 1,023 when serial offset loading is selected.

NOTES:

1. n = Empty Offset, Default Values: n = 127 when parallel offset loading is selected or n = 1,023 when serial offset loading is selected.

2. m = Full Offset, Default Values: m = 127 when parallel offset loading is selected or m = 1,023 when serial offset loading is selected.

TABLE 1 — STATUS FLAGS FOR IDT STANDARD MODE

TABLE 2 — STATUS FLAGS FOR FWFT MODE

IDT72281

IDT72291

FF

PAF

HF

PAE

EF

0

0

L

H

H

L

H

L

H

H

L

L

(n + 2) to 32,769

(n + 2) to 65,537

L

H

H

H

L

L

H

L

H

L

L

L

L

H

L

65,537

131,073

H

L

L

H

L

Number of

Words in

FIFO

IDT72281

IDT72291

FF

PAF

HF

PAE

EF

0

0

H

H

H

L

L

H

H

H

L

H

(n + 1) to 32,768

(n + 1) to 65,536

H

H

H

H

H

32,769 to (65,536–(m+1))

65,537 to (131,072–(m+1))

H

H

L

H

H

H

L

L

H

H

65,536

131,072

L

L

L

H

H

Number of

Words in

FIFO