IDT72V845L15PFI IDT, Integrated Device Technology Inc, IDT72V845L15PFI Datasheet - Page 11

• Manufacturer Part Number: IDT72V845L15PFI
• Description: IC FIFO SYNC 4096X18 128QFP
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: 72Vr

Specifications of IDT72V845L15PFI

• Function: Asynchronous, Synchronous
• Memory Size: 72K (4K x 18)
• Data Rate: 67MHz
• Access Time: 15ns
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 128-TQFP, 128-VQFP
• Configuration: Quad
• Density: 144Kb
• Access Time (max): 10ns
• Word Size: 18b
• Organization: 4Kx18x2
• Sync/async: Synchronous
• Expandable: Yes
• Bus Direction: Bi-Directional
• Package Type: TQFP
• Clock Freq (max): 66.7MHz
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Supply Current: 60mA
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 72V845L15PFI

WRITE EXPANSION OUT/HALF-FULL FLAG
(WXOA/HFA, WXOB/HFB)
mode, when Write Expansion In (WXIA/WXIB) and/or Read Expansion In
(RXIA/RXIB) are grounded, this output acts as an indication of a half-full
memory.
the next write cycle, the Half-Full flag goes LOW and will remain set until
the difference between the write pointer and read pointer is less than or
equal to one half of the total memory of the device. The Half-Full flag (HFA/
HFB) is then reset to HIGH by the LOW-to-HIGH transition of the Read
Clock (RCLK). The HF is asynchronous.
of the previous device. This output acts as a signal to the next device in
IDT72V805/72V815/72V825/72V835/72V845
3.3 V CMOS DUAL SyncFIFO™ 256 x 18, 512 x 18, 1,024 x 18, 4,096 x 18
This is a dual-purpose output. In the Single Device and Width Expansion
After half of the memory is filled, and at the LOW-to-HIGH transition of
In the Daisy Chain Depth Expansion mode, WXI is connected to WXO
11
the Daisy Chain by providing a pulse when the previous device writes to
the last location of memory.
READ EXPANSION OUT (RXOA/RXOB)
(RXIA/RXIB) is connected to Read Expansion Out (RXOA/RXOB) of the
previous device. This output acts as a signal to the next device in the Daisy
Chain by providing a pulse when the previous device reads from the last
location of memory.
DATA OUTPUTS (Q
In the Daisy Chain Depth Expansion configuration, Read Expansion In
Q
0
-Q
17
are data outputs for 18-bit wide data.
0
-Q
17
, QB
0
-QB
COMMERCIAL AND INDUSTRIAL
17
)
TEMPERATURE RANGES
FEBRUARY 11, 2009