72V285L15TFI Integrated Device Technology (Idt), 72V285L15TFI Datasheet

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72V285L15TFI

Manufacturer Part Number
72V285L15TFI
Description
FIFO Mem Sync Dual Depth/Width Uni-Dir 64K x 18 64-Pin STQFP Tray
Manufacturer
Integrated Device Technology (Idt)
Datasheet

Specifications of 72V285L15TFI

Package
64STQFP
Configuration
Dual
Bus Directional
Uni-Directional
Density
1.125 Mb
Organization
64Kx18
Data Bus Width
18 Bit
Timing Type
Synchronous
Expansion Type
Depth|Width
Typical Operating Supply Voltage
3.3 V
Operating Temperature
-40 to 85 °C
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc. The SuperSync FIFO is a trademark of Integrated Device Technology, Inc.
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
FEATURES:
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FUNCTIONAL BLOCK DIAGRAM
©2009 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
Choose among the following memory organizations:
Pin-compatible with the IDT72V255/72V265 SuperSync FIFOs
10ns read/write cycle time (6.5ns access time)
Fixed, low first word data latency time
Auto power down minimizes standby power consumption
Master Reset clears entire FIFO
Partial Reset clears data, but retains programmable
settings
Retransmit operation with fixed, low first word data
latency time
Empty, Full and Half-Full flags signal FIFO status
Programmable Almost-Empty and Almost-Full flags, each flag can
default to one of two preselected offsets
Program partial flags by either serial or parallel means
Select IDT Standard timing (using EF
Fall Through timing (using OR
Output enable puts data outputs into high impedance state
Easily expandable in depth and width
Independent Read and Write clocks (permit reading and writing
simultaneously)
Available in the 64-pin Thin Quad Flat Pack (TQFP) and the 64-pin
IDT72V275
IDT72V285
MRS
PRS
WRITE CONTROL
WRITE POINTER
WEN
32,768 x 18
65,536 x 18
OR
OR
OR
OR and IR
RESET
LOGIC
LOGIC
WCLK
EF
EF
EF and FF
EF
IR IR
IR IR flags)
3.3 VOLT CMOS SuperSync FIFO™
32,768 x 18
65,536 x 18
FF
FF
FF flags) or First Word
FF
OE
OUTPUT REGISTER
INPUT REGISTER
RAM ARRAY
32,768 x 18
65,536 x 18
D
Q
0
0
-D
-Q
17
17
1
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DESCRIPTION:
First-In-First-Out (FIFO) memories with clocked read and write controls.
These FIFOs offer numerous improvements over previous SuperSync
FIFOs, including the following:
SuperSync FIFOs are particularly appropriate for network, video, telecom-
munications, data communications and other applications that need to buffer
large amounts of data.
Slim Thin Quad Flat Pack (STQFP)
High-performance submicron CMOS technology
Green parts are available, see ordering information
The limitation of the frequency of one clock input with respect to the other
has been removed. The Frequency Select pin (FS) has been removed,
thus it is no longer necessary to select which of the two clock inputs, RCLK
or WCLK, is running at the higher frequency.
The period required by the retransmit operation is now fixed and short.
The first word data latency period, from the time the first word is written to
an empty FIFO to the time it can be read, is now fixed and short. (The
variable clock cycle counting delay associated with the latency period
found on previous SuperSync devices has been eliminated on this
SuperSync family.)
Industrial temperature range (-40°C to +85°C) is available
The IDT72V275/72V285 are exceptionally deep, high speed, CMOS
OFFSET REGISTER
READ POINTER
LOGIC
CONTROL
FLAG
LOGIC
READ
LD
SEN
FEBRUARY 2009
REN
RCLK
4512 drw 01
FF/IR
PAF
PAE
RT
EF/OR
HF
FWFT/SI
IDT72V275
IDT72V285
DSC-4512/3

Related parts for 72V285L15TFI

72V285L15TFI Summary of contents

Page 1

FEATURES: • • • • • Choose among the following memory organizations: IDT72V275 32,768 x 18 IDT72V285 65,536 x 18 • • • • • Pin-compatible with the IDT72V255/72V265 SuperSync FIFOs • • • • • 10ns read/write cycle time ...

Page 2

IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 x 18 DESCRIPTION (Continued) The input port is controlled by a Write Clock (WCLK) input and a Write Enable (WEN) input. Data is written into the FIFO on every rising ...

Page 3

IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 x 18 DESCRIPTION (Continued) These FIFOs have five flag pins, EF/OR (Empty Flag or Output Ready), FF/IR (Full Flag or Input Ready), HF (Half-full Flag), PAE (Programmable Almost-Empty flag) and ...

Page 4

IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 x 18 PIN DESCRIPTION Symbol Name D –D Data Inputs 0 17 MRS Master Reset PRS Partial Reset RT Retransmit FWFT/SI First Word Fall Through/Serial In WCLK Write Clock WEN ...

Page 5

IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 x 18 ABSOLUTE MAXIMUM RATINGS Symbol Rating V Terminal Voltage TERM with respect to GND T Storage STG Temperature I DC Output Current OUT NOTE: 1. Stresses greater than those ...

Page 6

IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 ELECTRICAL CHARACTERISTICS (Commercial 3.3V ± 0.3V + Symbol Parameter f Clock Cycle Frequency S t Data Access ...

Page 7

IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 x 18 FUNCTIONAL DESCRIPTION TIMING MODES: IDT STANDARD vs FIRST WORD FALL THROUGH (FWFT) MODE The IDT72V275/72V285 support two different timing modes of operation: IDT Standard mode or First Word ...

Page 8

IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 x 18 Figure 4, Programmable Flag Offset Programming Sequence, summa- rizes the control pins and sequence for both serial and parallel programming modes. For a more detailed description, see discussion ...

Page 9

IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 x 18 72V275 (32,768 BIT EMPTY OFFSET REGISTER DEFAULT VALUE 007FH LOW at Master Reset, 03FFH HIGH at ...

Page 10

IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 x 18 SERIAL PROGRAMMING MODE If Serial Programming mode has been selected, as described above, then programming of PAE and PAF values can be achieved by using a combination of ...

Page 11

IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 x 18 SIGNAL DESCRIPTION INPUTS: DATA Data inputs for 18-bit wide data. CONTROLS: MRS MRS MRS MRS) MASTER RESET (MRS A Master Reset ...

Page 12

IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 x 18 When WEN is HIGH, no new data is written in the RAM array on each WCLK cycle. To prevent data overflow in the IDT Standard mode, FF will ...

Page 13

IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 x 18 PROGRAMMABLE ALMOST-FULL FLAG (PAF The Programmable Almost-Full flag (PAF) will go LOW when the FIFO reaches the almost-full condition. In IDT Standard mode reads are performed ...

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IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 x 18 MRS REN WEN t FWFT FWFT/ SEN EF/OR FF/IR PAE PAF RSS t RSS t RSS ...

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IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 x 18 PRS REN WEN RT SEN EF/OR FF/IR PAE PAF RSS t RSS t RSS t RSS t RSF ...

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IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 WRITE WCLK 1 (1) t SKEW1 WEN RCLK t t ENS ENH REN DATA ...

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IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES ...

Page 18

IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES ...

Page 19

IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 x 18 RCLK t ENH t ENS t RTS REN WCLK t RTS WEN t ENS RT EF PAE HF PAF ...

Page 20

IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 x 18 RCLK t t ENH ENS t RTS REN WCLK t RTS WEN t ENS RT OR PAE HF PAF NOTES: 1. ...

Page 21

IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 x 18 WCLK LD WEN Figure 14. Parallel Loading of Programmable Flag Registers (IDT Standard and FWFT Modes) RCLK LD REN ...

Page 22

IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 CLKH CLKL WCLK t t ENS ENH WEN (2) n words in FIFO , PAE (3) n+1 words in FIFO (4) t SKEW2 RCLK 1 REN ...

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IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 x 18 OPTIONAL CONFIGURATIONS WIDTH EXPANSION CONFIGURATION Word width may be increased simply by connecting together the control signals of multiple devices. Status flags can be detected from any one ...

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IDT72V275/72V285 3.3V CMOS SUPERSYNC FIFO 32,768 x 18 and 65,536 x 18 FWFT/SI • FWFT/SI WRITE CLOCK WCLK WRITE ENABLE WEN IDT INPUT READY IR 72V275 72V285 n DATA IN Dn Figure 20. Block Diagram of 65,536 x 18 and ...

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ORDERING INFORMATION XXXXX X XX Device Type Power Speed NOTES: 1. Industrial temperature range product for the 15ns speed grade is available as a standard device. 2. Green parts available. For specific speeds and packages contact your sales office. DATASHEET ...

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