72255LA20TF IDT, 72255LA20TF Datasheet - Page 20

• Manufacturer Part Number: 72255LA20TF
• Description: FIFO
• Manufacturer: IDT

Specifications of 72255LA20TF

• Part # Aliases: IDT72255LA20TF

NOTES:
1. Retransmit setup is complete after EF returns HIGH, only then can a read operation begin.
2. OE = LOW.
3. W
4. No more than D –2 may be written to the FIFO between Reset (Master or Partial) and Retransmit setup. Therefore, FF will be HIGH throughout the Retransmit setup procedure.
5. EF goes HIGH at 60 ns + 1 RCLK cycle + t
IDT72255LA/72265LA CMOS SuperSync FIFO™
8,192 x 18 and 16,384 x 18
Q
WCLK
D = 8,192 for IDT72255LA and 16,384 for IDT72265LA.
RCLK
0
WEN
1
REN
PAE
PAF
- Q
= first word written to the FIFO after Master Reset, W
HF
EF
RT
n
t
ENS
W
x
t
A
t
ENH
t
ENS
t
RTS
REF
t
RTS
.
Figure 11. Retransmit Timing (IDT Standard Mode)
2
= second word written to the FIFO after Master Reset.
t
t
t
ENH
REF
HF
t
SKEW4
1
W
x+1
20
2
t
PAF
1
t
ENS
2
t
t
t
A
COMMERCIAL AND INDUSTRIAL
REF
PAE
(5)
TEMPERATURE RANGES
W
1
(3)
JANUARY 13, 2009
t
t
ENH
A
4670 drw 14
W
2
(3)