IDT72T7285/72T7295/72T72105/72T72115 2.5V TeraSync
16,384 x 72, 32,768 x 72, 65,536 x 72, 131,072 x 72
72-BIT FIFO
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
D71-D54
D53-D36
D35-D18
D17-D0
BYTE ORDER ON INPUT PORT:
Write to FIFO
A
B
C
D
BYTE ORDER ON OUTPUT PORT:
Q71-Q54
Q53-Q36
Q35-Q18
Q17-Q0
BE BM
IW
X
OW
X
A
B
C
D
Read from FIFO
X
L
(a) x72 INPUT to x72 OUTPUT
Q71-Q54
Q71-Q54
Q53-Q36
Q53-Q36
Q35-Q18
Q17-Q0
BE BM
IW
L
OW
L
1st: Read from FIFO
2nd: Read from FIFO
A
B
L
H
Q35-Q18
Q17-Q0
C
D
(b) x72 INPUT to x36 OUTPUT - BIG-ENDIAN
Q71-Q54
Q53-Q36
Q35-Q18
Q17-Q0
BE BM
IW
L
OW
L
1st: Read from FIFO
2nd: Read from FIFO
C
D
H
H
Q71-Q54
Q53-Q36
Q35-Q18
Q17-Q0
A
B
(c) x72 INPUT to x36 OUTPUT - LITTLE-ENDIAN
Q71-Q54
Q71-Q54
Q71-Q54
Q71-Q54
Q53-Q36
Q53-Q36
Q53-Q36
Q53-Q36
Q35-Q18
Q35-Q18
Q35-Q18
Q35-Q18
Q17-Q0
BE BM
IW
L
OW
H
A
1st: Read from FIFO
2nd: Read from FIFO
L
H
Q17-Q0
B
Q17-Q0
C
3rd: Read from FIFO
4th: Read from FIFO
Q17-Q0
D
(d) x72 INPUT to x18 OUTPUT - BIG-ENDIAN
Q71-Q54
Q53-Q36
Q35-Q18
Q17-Q0
BE BM
IW
L
OW
H
D
1st: Read from FIFO
H
H
Q71-Q54
Q71-Q54
Q71-Q54
Q53-Q36
Q53-Q36
Q53-Q36
Q35-Q18
Q35-Q18
Q35-Q18
Q17-Q0
2nd: Read from FIFO
3rd: Read from FIFO
C
Q17-Q0
B
Q17-Q0
A
4th: Read from FIFO
(e) x72 INPUT to x18 OUTPUT - LITTLE-ENDIAN
5994 drw09
Figure 5. Bus-Matching Byte Arrangement
26
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
