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43
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
IDT72T3645/55/65/75/85/95/105/115/125 2.5V TeraSync
36-BIT FIFO
1K x 36, 2K x 36, 4K x 36, 8K x 36, 16K x 36, 32K x 36, 64K x 36, 128K x 36 and 256K x 36
FEBRUARY 4, 2009
WCLK
RCLK
REN
Qn
12
WEN
3
tENS
tENH
tENS
tENH
tENS
tREF
RCS
OR
tRCSLZ
W1
W2
tRCSHZ
tRCSLZ
tA
W2
tSKEW
tENS
tENH
W2
Dn
tDH
tDS
tDH
tDS
W1
1st
Word
falls
through
to
O/P
register
on
this
cycle
5907
drw22
HIGH-Z
Figure
17
.
RCSRCSRCSRCSRCS
and
RENRENRENRENREN
Read
Operation
(FWFT
Mode)
NOTES:
1
.
Itis
very
important
that
the
REN
be
held
HIGH
for
at
least
one
cycle
after
RCS
has
gone
LOW.
If
REN
goes
LOW
on
the
same
cycle
as
RCS
or
earlier,
then
Word,
W1
will
be
lost,
Word,
W2
will
be
read
on
the
output
when
the
bus
goes
to
LOW-Z.
2
.
The
1st
Word
will
fall
through
to
the
output
register
regardless
of
REN
and
RCS
.However,
subsequent
reads
require
that
both
REN
and
RCS
be
active,
LOW.