IDT7281 Integrated Device Technology, IDT7281 Datasheet

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IDT7281

Manufacturer Part Number
IDT7281
Description
Cmos Dual Asynchronous Fifo
Manufacturer
Integrated Device Technology
Datasheet

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2006 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
FEATURES:
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FUNCTIONAL BLOCK DIAGRAM
IDT and the IDT logo are trademarks of Integrated Device Technology, Inc
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
WA
RA
The IDT7280 is equivalent to two IDT7200 256 x 9 FIFOs
The IDT7281 is equivalent to two IDT7201 512 x 9 FIFOs
The IDT7282 is equivalent to two IDT7202 1,024 x 9 FIFOs
The IDT7283 is equivalent to two IDT7203 2,048 x 9 FIFOs
The IDT7284 is equivalent to two IDT7204 4,096 x 9 FIFOs
The IDT7285 is equivalent to two IDT7205 8,192 x 9 FIFOs
Low power consumption
— Active: 685 mW (max.)
— Power-down: 83 mW (max.)
Ultra high speed—12 ns access time
Asynchronous and simultaneous read and write
Offers optimal combination of data capacity, small foot print
and functional flexibility
Ideal for bi-directional, width expansion, depth expansion,
bus-matching, and data sorting applications
Status Flags: Empty, Half-Full, Full
Auto-retransmit capability
High-performance CMOS technology
Space-saving TSSOP
Industrial temperature range (–40° ° ° ° ° C to +85° ° ° ° ° C) is available
Green parts available, see ordering information
XIA
CONTROL
CONTROL
WRITE
READ
EXPANSION
LOGIC
LOGIC
FLAG
XOA/HFA
POINTER
WRITE
FFA
BUFFERS
THREE-
STATE
EFA
DATA INPUTS
(QA
(DA
OUTPUTS
ARRAY A
1,024 x 9
2,048 x 9
4,096 x 9
8,192 x 9
CMOS DUAL ASYNCHRONOUS FIFO
DUAL 256 x 9, DUAL 512 x 9,
DUAL 1,024 x 9, DUAL 2,048 x 9,
DUAL 4,096 x 9, DUAL 8,192 x 9
256 x 9
512 x 9
DATA
RAM
0
0
-DA
-QA
8
8
)
)
POINTER
READ
FLA/RTA
RESET
LOGIC
RSA
1
DESCRIPTION:
load and empty data on a first-in/first-out basis. These devices are functional
and compatible to two IDT7200/7201/7202/7203/7204/7205 FIFOs in a single
package with all associated control, data, and flag lines assigned to separate
pins. The devices use Full and Empty flags to prevent data overflow and
underflow and expansion logic to allow for unlimited expansion capability in both
word size and depth.
with no address information required to load and unload data. Data is toggled
in and out of the devices through the use of the Write (W) and Read (R) pins.
at the user’s option. This feature is especially useful in data communications
applications where it is necessary to use a parity bit for transmission/reception
error checking. It also features a Retransmit (RT) capability that allows for reset
of the read pointer to its initial position when RT is pulsed LOW to allow for
retransmission from the beginning of data. A Half-Full Flag is available in the
single device mode and width expansion modes.
They are designed for those applications requiring asynchronous and simul-
taneous read/writes in multiprocessing and rate buffer applications.
RB
The IDT7280/7281/7282/7283/7284/7285 are dual-FIFO memories that
The reads and writes are internally sequential through the use of ring pointers,
The devices utilize a 9-bit wide data array to allow for control and parity bits
These FIFOs are fabricated using IDT’s high-speed CMOS technology.
WB
XIB
CONTROL
CONTROL
WRITE
READ
EXPANSION
LOGIC
LOGIC
FLAG
XOB/HFB
POINTER
WRITE
FFB
BUFFERS
THREE-
STATE
EFB
DATA INPUTS
(QB
(DB
OUTPUTS
ARRAY B
1,024 x 9
2,048 x 9
4,096 x 9
8,192 x 9
DATA
256 x 9
512 x 9
RAM
0
0
-DB
-QB
8
8
)
)
JULY 2006
POINTER
READ
FLB/RTB
RESET
LOGIC
DSC-3208/7
IDT7280
IDT7281
IDT7282
IDT7283
IDT7284
IDT7285
RSB
3208 drw 01

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IDT7281 Summary of contents

Page 1

... The IDT7280 is equivalent to two IDT7200 256 x 9 FIFOs • • • • • The IDT7281 is equivalent to two IDT7201 512 x 9 FIFOs • • • • • The IDT7282 is equivalent to two IDT7202 1,024 x 9 FIFOs • • • • • ...

Page 2

... FLB/RTB 30 RSB 3208 drw 02 NOTES: 1. For RT/RS/XI input 1.5V undershoots are allowed for 10ns once per cycle ± 10 –40°C to +85° IDT7280L IDT7281L IDT7282L Commercial & Industrial Min. –1 –10 = –2mA 2.4 = 8mA — — ) — IH ...

Page 3

... COMMERCIAL TEMPERATURE RANGE (2) Commercial & Industrial IDT7280L15 IDT7281L15 IDT7282L15 IDT7283L15 IDT7284L15 IDT7285L15 Min. Max. Unit — 40 MHz 25 — ns — — — — — ...

Page 4

... If the read pointer is not moved after Reset (RS), the Full-Flag (FF) will go LOW after 256 writes for IDT7280, 512 writes for the IDT7281, 1,024 writes for the IDT7282, 2,048 writes for the IDT7283, 4,096 writes for the IDT7284 and 8,192 writes for the IDT7285 ...

Page 5

IDT7280/7281/7282/7283/7284/7285 5V ASYNCHRONOUS FIFO DUAL 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 HF, FF NOTES: 1. EF, FF, HF may change status during Reset, ...

Page 6

IDT7280/7281/7282/7283/7284/7285 5V ASYNCHRONOUS FIFO DUAL 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 x 9 LAST READ IGNORED READ REF DATA OUT VALID RT W,R ...

Page 7

IDT7280/7281/7282/7283/7284/7285 5V ASYNCHRONOUS FIFO DUAL 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 HALF-FULL OR LESS HF WRITE TO LAST PHYSICAL LOCATION XOL ...

Page 8

IDT7280/7281/7282/7283/7284/7285 5V ASYNCHRONOUS FIFO DUAL 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 x 9 USAGE MODES: WIDTH EXPANSION Word width may be increased simply by connecting the corresponding input control ...

Page 9

IDT7280/7281/7282/7283/7284/7285 5V ASYNCHRONOUS FIFO DUAL 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 x 9 TABLE 1 — RESET AND RETRANSMIT Single Device Configuration/Width Expansion Mode RS Mode Reset 0 Retransmit ...

Page 10

IDT7280/7281/7282/7283/7284/7285 5V ASYNCHRONOUS FIFO DUAL 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 x 9 IDT7280/7281/ 7282/7283/ 7284/7285 DEPTH EXPANSION BLOCK NOTES: 1. For ...

Page 11

IDT7280/7281/7282/7283/7284/7285 5V ASYNCHRONOUS FIFO DUAL 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 x 9 DATA DATA OUT DATA IN DATA OUT t WEF ...

Page 12

ORDERING INFORMATION IDT XXXX X XXX Device Type Power Speed Package NOTES: 1. Industrial temperature range product for the 15ns speed grade is available as a standard device. 2. Green parts are available. For specific speeds contact your local sales ...

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