IDT72V201 IDT [Integrated Device Technology], IDT72V201 Datasheet

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IDT72V201

Manufacturer Part Number
IDT72V201
Description
Manufacturer
IDT [Integrated Device Technology]
Datasheet

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are very high-speed, low-power First-In, First-Out (FIFO) memories with
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc. SyncFIFO is a trademark of Integrated Device Technology, Inc.
2002 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
256 x 9-bit organization IDT72V201
512 x 9-bit organization IDT72V211
1,024 x 9-bit organization IDT72V221
2,048 x 9-bit organization IDT72V231
4,096 x 9-bit organization IDT72V241
8,192 x 9-bit organization IDT72V251
10 ns read/write cycle time
5V input tolerant
Read and Write clocks can be independent
Dual-Ported zero fall-through time architecture
Empty and Full Flags signal FIFO status
Programmable Almost-Empty and Almost-Full flags can be set to
any depth
Programmable Almost-Empty and Almost-Full flags default to
Empty+7, and Full-7, respectively
Output Enable puts output data bus in high-impedance state
Advanced submicron CMOS technology
Available in 32-pin plastic leaded chip carrier (PLCC) and 32-pin
plastic Thin Quad FlatPack (TQFP)
Industrial temperature range (–40 C to +85 C) is available
The IDT72V201/72V211/72V221/72V231/72V241/72V251 SyncFIFOs™
WRITE CONTROL
WCLK
WRITE POINTER
RESET LOGIC
WEN1
LOGIC
RS
WEN2
3.3 VOLT CMOS SyncFIFO™
256 x 9, 512 x 9,
1,024 x 9, 2,048 x 9,
4,096 x 9 and 8,192 x 9
OE
OUTPUT REGISTER
1,024 x 9, 2,048 x 9,
4,096 x 9, 8,192 x 9
INPUT REGISTER
256 x 9, 512 x 9,
RAM ARRAY
D
Q
0
0
- D
- Q
8
8
1
clocked read and write controls. The architecture, functional operation and pin
assignments are identical to those of the IDT72201/72211/72221/72231/
72241/72251, but operate at a power supply voltage (Vcc) between 3.0V and
3.6V. These devices have a 256, 512, 1,024, 2,048, 4,096 and 8,192 x 9-bit
memory array, respectively. These FIFOs are applicable for a wide variety of
data buffering needs such as graphics, local area networks and interprocessor
communication.
controlled by a free-running clock (WCLK), and two Write Enable pins
(WEN1, WEN2). Data is written into the Synchronous FIFO on every rising
clock edge when the Write Enable pins are asserted. The output port is
controlled by another clock pin (RCLK) and two Read Enable pins (REN1,
REN2). The Read Clock can be tied to the Write Clock for single clock
operation or the two clocks can run asynchronous of one another for dual-
clock operation. An Output Enable pin (OE) is provided on the read port
for three-state control of the output.
Two programmable flags, Almost-Empty (PAE) and Almost-Full (PAF), are
provided for improved system control. The programmable flags default to
Empty+7 and Full-7 for PAE and PAF, respectively. The programmable flag
offset loading is controlled by a simple state machine and is initiated by asserting
the Load pin (LD).
technology.
These FIFOs have 9-bit input and output ports. The input port is
The Synchronous FIFOs have two fixed flags, Empty (EF) and Full (FF).
These FIFOs are fabricated using IDT's high-speed submicron CMOS
OFFSET REGISTER
READ CONTROL
READ POINTER
RCLK
LOGIC
LOGIC
FLAG
REN1
REN2
LD
IDT72V201, IDT72V211
IDT72V221, IDT72V231
IDT72V241, IDT72V251
4092 drw 01
EF
PAE
PAF
FF
DSC-4092/2

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IDT72V201 Summary of contents

Page 1

... IDT72V201 512 x 9-bit organization IDT72V211 1,024 x 9-bit organization IDT72V221 2,048 x 9-bit organization IDT72V231 4,096 x 9-bit organization IDT72V241 8,192 x 9-bit organization IDT72V251 10 ns read/write cycle time 5V input tolerant Read and Write clocks can be independent Dual-Ported zero fall-through time architecture ...

Page 2

... IDT72V201/72V211/72V221/72V231/72V241/72V251 3.3V CMOS SyncFIFO™ 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 x 9 INDEX PAF 3 PAE 4 5 GND REN1 6 RCLK 7 REN2 TQFP (PR32-1, order code: PF) ...

Page 3

... IDT72V201/72V211/72V221/72V231/72V241/72V251 3.3V CMOS SyncFIFO™ 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 x 9 Symbol Rating (2) V Terminal Voltage with TERM Respect to GND T Storage Temperature STG I DC Output Current OUT NOTE: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device ...

Page 4

... IDT72V201/72V211/72V221/72V231/72V241/72V251 3.3V CMOS SyncFIFO™ 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 x 9 (Commercial 3.3 ±0.3V C;Industrial Symbol Parameter f Clock Cycle Frequency S t Data Access Time A t Clock Cycle Time CLK t Clock High Time CLKH ...

Page 5

... Write Enable 2/Load (WEN2/LD) are ignored when the FIFO is full. The FIFO is configured to have programmable flags when the Write Enable 2/Load (WEN2/LD) is set LOW at Reset (RS = LOW). The IDT72V201/72V211/ 72V221/72V231/72V241/72V251 devices contain four 8-bit offset registers which can be loaded with data on the inputs, or read on the outputs. See Figure 3 for details of the size of the registers and the default values ...

Page 6

... IDT72V201/72V211/72V221/72V231/72V241/72V251 3.3V CMOS SyncFIFO™ 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 x 9 IDT72V201 - 256 x 9-BIT 8 7 Empty Offset (LSB) Reg. Default Value 007H Full Offset (LSB) Reg. Default Value 007H 8 IDT72V231 - 2,049 x 9-BIT 8 7 Empty Offset (LSB) Reg. ...

Page 7

... The Full Flag (FF) will go LOW, inhibiting further write operation, when the device is full reads are performed after Reset (RS), the Full Flag (FF) will go LOW after 256 writes for the IDT72V201, 512 writes for the IDT72V211, 1,024 writes for the IDT72V221, 2,048 writes for the IDT72V231, 4,096 writes for the IDT72V241 and 8,192 writes for the IDT72V251 ...

Page 8

... IDT72V201/72V211/72V221/72V231/72V241/72V251 3.3V CMOS SyncFIFO™ 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 REN1, REN2 WEN1 (1) WEN2/LD EF, PAE FF, PAF NOTES: 1. Holding WEN2/LD HIGH during reset will make the pin act as a second write enable pin. Holding WEN2/LD LOW during reset will make the pin act as a load enable for the programmable flag offset registers ...

Page 9

... IDT72V201/72V211/72V221/72V231/72V241/72V251 3.3V CMOS SyncFIFO™ 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 x 9 RCLK t t ENS ENH REN1, REN2 OLZ OE WCLK WEN1 WEN2 NOTE: is the minimum time between a rising WCLK edge and a rising RCLK edge for EF to change during the current clock cycle. If the time between 1 ...

Page 10

... IDT72V201/72V211/72V221/72V231/72V241/72V251 3.3V CMOS SyncFIFO™ 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 WRITE WCLK t SKEW1 WEN1 WEN2 (If Applicable) RCLK t ENH t ENS REN1, REN2 OE LOW DATA IN OUTPUT REGISTER 0 8 NOTE: 1. Only one of the two Write Enable inputs, WEN1 or WEN2, needs to go inactive to inhibit writes to the FIFO. ...

Page 11

... NOTES PAF offset. 2. 256 - m words in FIFO for IDT72V201, 512 - m words for IDT72V211, 1,024 - m words for IDT72V221, 2,048 - m words for IDT72V231, 4,096 - m words for IDT72V241, 8,192 - m words for IDT72V251. is the minimum time between a rising RCLK edge and a rising WCLK edge for PAF to change during that clock cycle. If the time between the rising edge of RCLK and 3 ...

Page 12

... IDT72V201/72V211/72V221/72V231/72V241/72V251 3.3V CMOS SyncFIFO™ 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 CLK t t CLKH CLKL WCLK t ENS LD t ENS WEN1 PAE OFFSET (LSB) t CLK t t CLKH CLKL RCLK t ENS LD t ENS REN1, ...

Page 13

... FF). The partial status flags (AE and AF) can be detected from any one device. Figure 15 demonstrates a 18-bit word width by using two IDT72V201/72V211/72V221/72V231/72V241/72V251s. Any word width can be attained by adding additional IDT72V201/72V211/ 72V221/72V231/72V241/72V251s. When these devices are in a Width Expansion Configuration, the Read Enable 2 (REN2) control input can be grounded (see Figure 15) ...

Page 14

IDT XXXXX X XX Device Type Power Speed NOTE: 1. Industrial temperature range product for the 15ns is available as a standard device. All other speed grades are available by special order. 01/11/2002 pg. 3. 02/01/2002 pg. 3. CORPORATE HEADQUARTERS ...

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