IDT72V255LA20PF IDT, Integrated Device Technology Inc, IDT72V255LA20PF Datasheet - Page 24
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IDT72V255LA20PF
Manufacturer Part Number
IDT72V255LA20PF
Description
IC FIFO SS 8192X18 20NS 64-TQFP
Manufacturer
IDT, Integrated Device Technology Inc
Series
72Vr
Datasheet
1.IDT72V255LA10TFG.pdf
(27 pages)
Specifications of IDT72V255LA20PF
Function
Synchronous
Memory Size
144K (8K x 18)
Access Time
20ns
Voltage - Supply
3 V ~ 3.6 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
64-TQFP, 64-VQFP
Configuration
Dual
Density
144Kb
Access Time (max)
12ns
Word Size
18b
Organization
8Kx18
Sync/async
Synchronous
Expandable
Yes
Bus Direction
Uni-Directional
Package Type
TQFP
Clock Freq (max)
50MHz
Operating Supply Voltage (typ)
3.3V
Operating Supply Voltage (min)
3V
Operating Supply Voltage (max)
3.6V
Supply Current
55mA
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
64
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Data Rate
-
Lead Free Status / RoHS Status
Not Compliant, Contains lead / RoHS non-compliant
Other names
72V255LA20PF
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
IDT72V255LA20PF
Manufacturer:
IDT
Quantity:
6
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Part Number:
IDT72V255LA20PF
Manufacturer:
IDT
Quantity:
1 000
Company:
Part Number:
IDT72V255LA20PF
Manufacturer:
IDT, Integrated Device Technology Inc
Quantity:
10 000
Company:
Part Number:
IDT72V255LA20PF8
Manufacturer:
IDT, Integrated Device Technology Inc
Quantity:
10 000
OPTIONAL CONFIGURATIONS
WIDTH EXPANSION CONFIGURATION
control signals of multiple devices. Status flags can be detected from
any one device. The exceptions are the EF and FF functions in IDT
Standard mode and the IR and OR functions in FWFT mode. Because
of variations in skew between RCLK and WCLK, it is possible for EF/FF
deassertion and IR/OR assertion to vary by one cycle between FIFOs. In
NOTES:
1. Use an AND gate in IDT Standard mode, an OR gate in FWFT mode.
2. Do not connect any output control signals directly together.
3. FIFO #1 and FIFO #2 must be the same depth, but may be different word widths.
IDT72V255LA/72V265LA 3.3 VOLT CMOS SuperSync FIFO™
8,192 x 18, 16,384 x 18
Word width may be increased simply by connecting together the
GATE
(1)
FIRST WORD FALL THROUGH/
DATA IN
SERIAL INPUT (FWFT/SI)
MASTER RESET (MRS)
PARTIAL RESET (PRS)
FULL FLAG/INPUT READY (FF/IR)
FULL FLAG/INPUT READY (FF/IR) #2
RETRANSMIT (RT)
m + n
PROGRAMMABLE (PAF)
WRITE CLOCK (WCLK)
WRITE ENABLE (WEN)
HALF-FULL FLAG (HF)
Figure 19. Block Diagram of 8,192 x 36 and 16,384 x 36 Width Expansion
D
0
- Dm
LOAD (LD)
m
#1
72V255LA
72V265LA
IDT
FIFO
#1
Dm
m
+1
- Dn
Q
24
0
n
- Qm
IDT Standard mode, such problems can be avoided by creating composite
flags, that is, ANDing EF of every FIFO, and separately ANDing FF of
every FIFO. In FWFT mode, composite flags can be created by ORing
OR of every FIFO, and separately ORing IR of every FIFO.
72V265LA devices. D0 - D17 from each device form a 36-bit wide input
bus and Q0-Q17 from each device form a 36-bit wide output bus. Any
word width can be attained by adding additional IDT72V255LA/72V265LA
devices.
Figure 23 demonstrates a width expansion using two IDT72V255LA/
72V255LA
72V265LA
FIFO
IDT
#2
READ CLOCK (RCLK)
n
READ ENABLE (REN)
OUTPUT ENABLE (OE)
EMPTY FLAG/OUTPUT READY (EF/OR) #2
EMPTY FLAG/OUTPUT READY (EF/OR) #1
PROGRAMMABLE (PAE)
Qm
+1
- Qn
COMMERCIAL AND INDUSTRIAL
m + n
TEMPERATURE RANGES
DATA OUT
OCTOBER 22, 2008
4672 drw 22
GATE
(1)