IDT72V3680L10PF IDT, Integrated Device Technology Inc, IDT72V3680L10PF Datasheet - Page 12

• Manufacturer Part Number: IDT72V3680L10PF
• Description: IC FIFO SS 16384X36 10NS 128TQFP
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: 72Vr

Specifications of IDT72V3680L10PF

• Function: Asynchronous, Synchronous
• Memory Size: 576K (16K x 36)
• Data Rate: 100MHz
• Access Time: 10ns
• Voltage - Supply: 3.15 V ~ 3.45 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 128-TQFP, 128-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 72V3680L10PF

FUNCTIONAL DESCRIPTION
TIMING MODES: IDT STANDARD vs FIRST WORD FALL THROUGH
(FWFT) MODE
port two different timing modes of operation: IDT Standard mode or First Word
Fall Through (FWFT) mode. The selection of which mode will operate is
determined during Master Reset, by the state of the FWFT/SI input.
will be selected. This mode uses the Empty Flag (EF) to indicate whether or
not there are any words present in the FIFO. It also uses the Full Flag function
(FF) to indicate whether or not the FIFO has any free space for writing. In IDT
Standard mode, every word read from the FIFO, including the first, must be
requested using the Read Enable (REN) and RCLK.
selected. This mode uses Output Ready (OR) to indicate whether or not there
is valid data at the data outputs (Q
whether or not the FIFO has any free space for writing. In the FWFT mode,
the first word written to an empty FIFO goes directly to Q
edges, REN = LOW is not necessary. Subsequent words must be accessed
using the Read Enable (REN) and RCLK.
on which timing mode is in effect.
IDT STANDARD MODE
manner outlined in Table 3. To write data into to the FIFO, Write Enable (WEN)
must be LOW. Data presented to the DATA IN lines will be clocked into the FIFO
on subsequent transitions of the Write Clock (WCLK). After the first write is
performed, the Empty Flag (EF) will go HIGH. Subsequent writes will continue
to fill up the FIFO. The Programmable Almost-Empty flag (PAE) will go HIGH
after n + 1 words have been loaded into the FIFO, where n is the empty offset
value. The default setting for these values are stated in the footnote of Table 2.
This parameter is also user programmable. See section on Programmable Flag
Offset Loading.
operations were taking place, the Half-Full flag (HF) would toggle to LOW once
the 513rd word for IDT72V3640, 1,025th word for IDT72V3650, 2,049th word
for IDT72V3660, 4,097th word for IDT72V3670, 8,193th word for the
IDT72V3680 and 16,385th word for the IDT72V3690, respectively was written
into the FIFO. Continuing to write data into the FIFO will cause the Programmable
Almost-Full flag (PAF) to go LOW. Again, if no reads are performed, the PAF
will go LOW after (1,024-m) writes for the IDT72V3640, (2,048-m) writes for the
IDT72V3650, (4,096-m) writes for the IDT72V3660, (8,192-m) writes for the
IDT72V3670, (16,384-m) writes for the IDT72V3680 and (32,768-m) writes
for the IDT72V3690. The offset “m” is the full offset value. The default setting
for these values are stated in the footnote of Table 2. This parameter is also user
programmable. See section on Programmable Flag Offset Loading.
operations. If no reads are performed after a reset, FF will go LOW after D writes
to the FIFO. D = 1,024 writes for the IDT72V3640, 2,048 writes for the
IDT72V3650, 4,096 writes for the IDT72V3660, 8,192 writes for the IDT72V3670,
16,384 writes for the IDT72V3680 and 32,768 writes for the IDT72V3690,
respectively.
IDT72V3640/50/60/70/80/90 3.3V HIGH DENSITY SUPERSYNC II
1,024 x 36, 2,048 x 36, 4,096 x 36, 8,192 x 36, 16,384 x 36 and 32,768 x 36
The IDT72V3640/72V3650/72V3660/72V3670/72V3680/72V3690 sup-
Various signals, both input and output signals operate differently depending
In this mode, the status flags, FF, PAF, HF, PAE, and EF operate in the
If one continued to write data into the FIFO, and we assumed no read
When the FIFO is full, the Full Flag (FF) will go LOW, inhibiting further write
If, at the time of Master Reset, FWFT/SI is LOW, then IDT Standard mode
If, at the time of Master Reset, FWFT/SI is HIGH, then FWFT mode will be
n)
. It also uses Input Ready (IR) to indicate
n
after three RCLK rising
TM
12
36-BIT FIFO
Subsequent read operations will cause PAF and HF to go HIGH at the conditions
described in Table 3. If further read operations occur, without write operations,
PAE will go LOW when there are n words in the FIFO, where n is the empty
offset value. Continuing read operations will cause the FIFO to become empty.
When the last word has been read from the FIFO, the EF will go LOW inhibiting
further read operations. REN is ignored when the FIFO is empty.
register-buffered outputs.
7,8,11 and 13.
FIRST WORD FALL THROUGH MODE (FWFT)
manner outlined in Table 4. To write data into to the FIFO, WEN must be LOW.
Data presented to the DATA IN lines will be clocked into the FIFO on subsequent
transitions of WCLK. After the first write is performed, the Output Ready (OR)
flag will go LOW. Subsequent writes will continue to fill up the FIFO. PAE will go
HIGH after n + 2 words have been loaded into the FIFO, where n is the empty
offset value. The default setting for these values are stated in the footnote of Table
2. This parameter is also user programmable. See section on Programmable
Flag Offset Loading.
operations were taking place, the HF would toggle to LOW once the 514th word
for the IDT72V3640, 1,026th word for the IDT72V3650, 2,050th word for the
IDT72V3660, 4,098th word for the IDT72V3670, 8,194th word for the
IDT72V3680, 16,386th word for the IDT72V3690, respectively was written into
the FIFO. Continuing to write data into the FIFO will cause the PAF to go LOW.
Again, if no reads are performed, the PAF will goLOW after (1,025-m) writes
for the IDT72V3640, (2,049-m) writes for the IDT72V3650, (4,097-m) writes
for the IDT72V3660 and (8,193-m) writes for the IDT72V3670, (16,385-m)
writes for the IDT72V3680 and (32,769-m) writes for the IDT72V3690, where
m is the full offset value. The default setting for these values are stated in the
footnote of Table 2.
write operations. If no reads are performed after a reset, IR will go HIGH after
D writes to the FIFO. D = 1,025 writes for the IDT72V3640, 2,049 writes for
the IDT72V3650, 4,097 writes for the IDT72V3660 and 8,193 writes for the
IDT72V3670,16,385 writes for the IDT72V3680 and 32,769 writes for the
IDT72V3690, respectively. Note that the additional word in FWFT mode is due
to the capacity of the memory plus output register.
Subsequent read operations will cause the PAF and HF to go HIGH at the
conditions described in Table 4. If further read operations occur, without write
operations, the PAE will go LOW when there are n + 1 words in the FIFO, where
n is the empty offset value. Continuing read operations will cause the FIFO to
become empty. When the last word has been read from the FIFO, OR will go
HIGH inhibiting further read operations. REN is ignored when the FIFO is empty.
buffered, and the IR flag output is double register-buffered.
and 14.
If the FIFO is full, the first read operation will cause FF to go HIGH.
When configured in IDT Standard mode, the EF and FF outputs are double
Relevant timing diagrams for IDT Standard mode can be found in Figure
In this mode, the status flags, IR, PAF, HF, PAE, and OR operate in the
If one continued to write data into the FIFO, and we assumed no read
When the FIFO is full, the Input Ready (IR) flag will go HIGH, inhibiting further
If the FIFO is full, the first read operation will cause the IR flag to go LOW.
When configured in FWFT mode, the OR flag output is triple register-
Relevant timing diagrams for FWFT mode can be found in Figure 9, 10, 12,
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
OCTOBER 22, 2008