IDT72255LA15PFG IDT, Integrated Device Technology Inc, IDT72255LA15PFG Datasheet - Page 9

• Manufacturer Part Number: IDT72255LA15PFG
• Description: IC FIFO SUPERSYNC 8KX18 64QFP
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: 7200r

Specifications of IDT72255LA15PFG

• Function: Synchronous
• Memory Size: 144K (8K x 18)
• Access Time: 15ns
• Voltage - Supply: 4 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 64-TQFP, 64-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Rate: -
• Other names: 72255LA15PFG; 800-1500

IDT72255LA/72265LA CMOS SuperSync FIFO™
8,192 x 18 and 16,384 x 18
NOTES:
1. The programming method can only be selected at Master Reset.
2. Parallel reading of the offset registers is always permitted regardless of which programming method has been selected.
3. The programming sequence applies to both IDT Standard and FWFT modes.
17
17
LD
0
0
0
X
1
1
1
12
12
72255LA — 8,192 x 18–BIT
WEN
3FFH if LD is HIGH at Master Reset
3FFH if LD is HIGH at Master Reset
X
0
1
1
1
0
1
07FH if LD is LOW at Master Reset,
07FH if LD is LOW at Master Reset,
EMPTY OFFSET REGISTER
FULL OFFSET REGISTER
DEFAULT VALUE
DEFAULT VALUE
REN
X
1
0
1
1
0
1
Figure 4. Programmable Flag Offset Programming Sequence
Figure 3. Offset Register Location and Default Values
SEN
X
1
1
0
1
X
X
WCLK
X
X
X
X
0
0
9
17
17
RCLK
X
X
X
X
X
13
13
72265LA — 16,384 x 18–BIT
Parallel write to registers:
Empty Offset
Full Offset
Parallel read from registers:
Serial shift into registers:
26 bits for the 72255LA
28 bits for the 72265LA
1 bit for each rising WCLK edge
Starting with Empty Offset (LSB)
Ending with Full Offset (MSB)
No Operation
Write Memory
Read Memory
No Operation
Empty Offset
Full Offset
3FFH if LD is HIGH at Master Reset
3FFH if LD is HIGH at Master Reset
07FH if LD is LOW at Master Reset,
07FH if LD is LOW at Master Reset,
EMPTY OFFSET REGISTER
FULL OFFSET REGISTER
DEFAULT VALUE
DEFAULT VALUE
COMMERCIAL AND INDUSTRIAL
Selection
TEMPERATURE RANGES
JANUARY 13, 2009
4670 drw07
4670 drw06
0
0