72V01L35J Integrated Device Technology (Idt), 72V01L35J Datasheet - Page 8

• Manufacturer Part Number: 72V01L35J
• Description: FIFO Mem Async Dual Depth/Width Uni-Dir 512 x 9 32-Pin PLCC
• Manufacturer: Integrated Device Technology (Idt)

Specifications of 72V01L35J

• Package: 32PLCC
• Configuration: Dual
• Bus Directional: Uni-Directional
• Density: 4.5 Kb
• Organization: 512x9
• Data Bus Width: 9 Bit
• Timing Type: Asynchronous
• Expansion Type: Depth|Width
• Typical Operating Supply Voltage: 3.3 V
• Operating Temperature: 0 to 70 °C

OPERATING MODES:
system (i.e. FF is monitored on the device where W is used; EF is monitored
on the device where R is used). For additional information, refer to Tech Note
8: Operating FIFOs on Full and Empty Boundary Conditions and Tech Note
6: Designing with FIFOs.
SINGLE DEVICE MODE
when the application requirements are for 512/1,024/2,048/4,096/8,192/
16,384 words or less. These devices are in a Single Device Configuration when
the Expansion In ( XI ) control input is grounded (see Figure 12).
are for greater than 512/1,024/2,048/4,096/8,192/16,384 words. Figure 14
demonstrates Depth Expansion using three IDT72V01/72V02/72V03/72V04/
72V05/72V06s. Any depth can be attained by adding additional IDT72V01/
72V02/72V03/72V04/72V05/72V06s. These devices operate in the Depth
Expansion mode when the following conditions are met:
1. The first device must be designated by grounding the First Load ( FL ) control
2. All other devices must have FL in the HIGH state.
3. The Expansion Out ( XO ) pin of each device must be tied to the Expansion
4. External logic is needed to generate a composite Full Flag ( FF ) and Empty
5. The Retransmit ( RT ) function and Half-Full Flag ( HF ) are not available
Modules.
IDT72V01/72V02/72V03/72V04/72V05/72V06 3.3V ASYNCHRONOUS FIFO
512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9, 8,192 x 9 and 16,384 x 9
A single IDT72V01/72V02/72V03/72V04/72V05/72V06 may be used
These FIFOs can easily be adapted to applications when the requirements
input.
In ( XI ) pin of the next device. See Figure 14.
Flag ( EF ). This requires the ORing of all EFs and ORing of all FFs (i.e.
all must be set to generate the correct composite FF or EF). See Figure 14.
in the Depth Expansion Mode.
For additional information, refer to Tech Note 9: Cascading FIFOs or FIFO
Care must be taken to assure that the appropriate flag is monitored by each
8
USAGE MODES:
WIDTH EXPANSION
control signals of multiple devices. Status flags (EF, FF and HF) can be detected
from any one device. Figure 13 demonstrates an 18-bit word width by using
two IDT72V01/72V02/72V03/72V04/72V05/72V06s. Any word width can be
attained by adding additional IDT72V01/72V02/72V03/72V04/72V05/72V06s
(Figure 13).
BIDIRECTIONAL OPERATION
system capable of Read and Write operations) can be achieved by pairing
IDT72V01/72V02/72V03/72V04/72V05/72V06s as shown in Figure 16. Both
Depth Expansion and Width Expansion may be used in this mode.
DATA FLOW-THROUGH
write flow-through mode. For the read flow-through mode (Figure 17), the FIFO
permits a reading of a single word after writing one word of data into an empty
FIFO. The data is enabled on the bus in (t
W, called the first write edge, and it remains on the bus until the R line is raised
from LOW-to-HIGH, after which the bus would go into a three-state mode after
t
then would be asserted.
a single word of data immediately after reading one word of data from a full FIFO.
The R line causes the FF to be deasserted but the W line being LOW causes
it to be asserted again in anticipation of a new data word. On the rising edge
of W, the new word is loaded in the FIFO. The W line must be toggled when FF
is not asserted to write new data in the FIFO and to increment the write pointer.
RHZ
Word width may be increased simply by connecting the corresponding input
Applications which require data buffering between two systems (each
Two types of flow-through modes are permitted, a read flow-through and
In the write flow-through mode (Figure 18), the FIFO permits the writing of
ns. The EF line would have a pulse showing temporary deassertion and
COMMERCIAL AND INDUSTRIAL
WEF
+ t
TEMPERATURE RANGES
A
) ns after the rising edge of
OCTOBER 22, 2008