IDT72821L20PF Integrated Device Technology, Inc., IDT72821L20PF Datasheet

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IDT72821L20PF

Manufacturer Part Number
IDT72821L20PF
Description
Dual CMOS syncFIFO
Manufacturer
Integrated Device Technology, Inc.
Datasheet
FEATURES:
• The 72801 is equivalent to two 72201 256 x 9 FIFOs
• The 72811 is equivalent to two 72211 512 x 9 FIFOs
• The 72821 is equivalent to two 72221 1024 x 9 FIFOs
• The 72831 is equivalent to two 72231 2048 x 9 FIFOs
• The 72841 is equivalent to two 72241 4096 x 9 FIFOs
• Offers optimal combination of large capacity, high speed,
• Ideal for prioritization, bidirectional, and width expansion
• 15 ns read/write cycle time FOR THE 72801/72811
• 20 ns read/write cycle time FOR THE 72821/72831/72841
• Separate control lines and data lines for each FIFO
• Separate empty, full, programmable almost-empty and
• Enable puts output data lines in high-impedance state
• Space-saving 64-pin Thin Quad Flat Pack (TQFP)
• Industrial temperature range (-40
DESCRIPTION:
PIN CONFIGURATION
SyncFIFO is a trademark and the IDT logo is a registered trademark of Integrated Device Technology, Inc.
COMMERCIAL TEMPERATURE RANGE
1996 Integrated Device Technology, Inc
design flexibility and small footprint
applications
almost-full flags for each FIFO
able, tested to military electrical specifications
Integrated Device Technology, Inc.
72801/72811/72821/72831/72841 are dual synchronous
WENA
WCLKA
WENA
2
/
LDA
RSA
QA
QA
QA
QA
QA
QA
QA
QA
DA
DA
DA
V
CC
For latest information contact IDT's web site at www.idt.com or fax-on-demand at 408-492-8391.
1
2
3
4
5
6
7
8
1
8
7
6
O
C to +85
DUAL CMOS SyncFIFO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
O
C) is avail-
TOP VIEW
PN64-1
TQFP,
5.15
(clocked) FIFOs. The device is functionally equivalent to two
72201/72211/72221/72231/72241 FIFOs in a single package
with all associated control, data, and flag lines assigned to
separate pins.
contained in the 72801/72811/72821/72831/72841 has a 9-
bit input data port (DA0 - DA8), DB0 - DB8) and a 9-bit output
data port (QA0 - QA8, QB0 - QB8). Each input port is
controlled by a free-running clock(WCLKA, WCLKB), and two
write enable pins (
is written into each of the two arrays on every rising clock edge
of the write clock (WCLKA WCLKB) when the appropriate
write enable pins are asserted.
associated clock pin (RCLKA, RCLKB) and two read enable
pins (
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 (
read port of each FIFO for three-state output control .
and full (
(
PAEA
Each of the two FIFOs (designated FIFO A and FIFO B)
The output port of each FIFO bank is controlled by its
Each of the two FIFOs has two fixed flags, empty (
RENA1
,
PAEB
FFA
,
,
) and almost-full (
FFB
RENA2
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
WENA1
). Two programmable flags, almost-empty
,
3034 drw 01
RENB1
QB0
FFB
EFB
OEB
RENB
RCLKB
RENB
GND
V
PAEB
PAFB
DB
DB
DB
DB
DB
, WENA2,
CC
0
1
2
3
4
,
PAFA
2
1
RENB2
OEA
WENB1
,
,
PAFB
OEB
). The read clock can
NOVEMBER 1996
) is provided on the
), are provided for
, WENB2). Data
IDT72801
IDT72811
IDT72821
IDT72831
IDT72841
EFA
DSC-3034/1
,
EFB
1
)

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IDT72821L20PF Summary of contents

Page 1

... SyncFIFO is a trademark and the IDT logo is a registered trademark of Integrated Device Technology, Inc. COMMERCIAL TEMPERATURE RANGE 1996 Integrated Device Technology, Inc For latest information contact IDT's web site at www.idt.com or fax-on-demand at 408-492-8391. DUAL CMOS SyncFIFO (clocked) FIFOs. The device is functionally equivalent to two ...

Page 2

DUAL CMOS SyncFIFO 256 x 9, 512 x 9, 1024 x 9, 2048 x 9 and 4096 x 9 each FIFO bank to improve memory utilization. If not pro- grammed, the programmable flags default to empty+7 for PAEA PAEB ...

Page 3

DUAL CMOS SyncFIFO 256 x 9, 512 x 9, 1024 x 9, 2048 x 9 and 4096 x 9 PIN DESCRIPTIONS The 72801/72811/72821/72831/72841s two FIFOs, referred to as FIFO A and FIFO B, are identical in every respect. The ...

Page 4

DUAL CMOS SyncFIFO 256 x 9, 512 x 9, 1024 x 9, 2048 x 9 and 4096 x 9 ABSOLUTE MAXIMUM RATINGS Symbol Rating V Terminal Voltage with TERM Respect to GND T Operating Temperature A T Temperature Under ...

Page 5

DUAL CMOS SyncFIFO 256 x 9, 512 x 9, 1024 x 9, 2048 x 9 and 4096 ELECTRICAL CHARACTERISTICS (Commercial 10 Symbol Parameter f Clock Cycle Frequency S t Data ...

Page 6

DUAL CMOS SyncFIFO 256 x 9, 512 x 9, 1024 x 9, 2048 x 9 and 4096 x 9 SIGNAL DESCRIPTIONS FIFO A and FIFO B are identical in every respect. The following description explains the interaction of input ...

Page 7

DUAL CMOS SyncFIFO 256 x 9, 512 x 9, 1024 x 9, 2048 x 9 and 4096 x 9 LDA WENA1 (1) WCLKA OPERATION ON FIFO A LDB WENB1 (1) WCLKB OPERATION ON FIFO Empty Offset ...

Page 8

DUAL CMOS SyncFIFO 256 x 9, 512 x 9, 1024 x 9, 2048 x 9 and 4096 x 9 OUTPUTS: FFA FFB FFA FFB FFA FFB Full Flag ( , ) — ( further write operations, when Array A ...

Page 9

DUAL CMOS SyncFIFO 256 x 9, 512 x 9, 1024 x 9, 2048 x 9 and 4096 x 9 RSA RSB ( ) RENA1 RENA2 , RENB1 RENB2 ( , ) WENA1 WENB1 ( ) LDA (1) WENA2/ LDB ...

Page 10

DUAL CMOS SyncFIFO 256 x 9, 512 x 9, 1024 x 9, 2048 x 9 and 4096 x 9 WCLKA (WCLKB) ( WENA1 WENB1 ( ) WENA2 (WENB2) (If ...

Page 11

DUAL CMOS SyncFIFO 256 x 9, 512 x 9, 1024 x 9, 2048 x 9 and 4096 x 9 RCLKA (RCLKB) t ENS RENA1 RENA2 , RENB1 RENB2 ( , ) EFA EFB ( ) ...

Page 12

DUAL CMOS SyncFIFO 256 x 9, 512 x 9, 1024 x 9, 2048 x 9 and 4096 x 9 WCLKA (WCLKB ( WENA1 WENB1 ( ) WENA2 (WENB2) (If ...

Page 13

DUAL CMOS SyncFIFO 256 x 9, 512 x 9, 1024 x 9, 2048 x 9 and 4096 WRITE WCLKA (WCLKB ( FFA FFB ( ) WENA1 ...

Page 14

DUAL CMOS SyncFIFO 256 x 9, 512 x 9, 1024 x 9, 2048 x 9 and 4096 x 9 WCLKA (WCLKB DATA WRITE 1 ( ENH ...

Page 15

DUAL CMOS SyncFIFO 256 x 9, 512 x 9, 1024 x 9, 2048 x 9 and 4096 CLKH WCLKA (WCLKB) WENA1 WENB1 ( WENA2 (WENB2) (If Applicable) PAFA PAFB ( ) RCLKA (RCLKB) RENA1 RENA2 , ...

Page 16

DUAL CMOS SyncFIFO 256 x 9, 512 x 9, 1024 x 9, 2048 x 9 and 4096 CLKH WCLKA (WCLKB) WENA1 WENB1 ( ) WENA2 (WENB2) (If Applicable) PAEA , n words in FIFO PAEB RCLKA ...

Page 17

DUAL CMOS SyncFIFO 256 x 9, 512 x 9, 1024 x 9, 2048 x 9 and 4096 CLKH WCLKA (WCLKB) t ENS LDA LDB ( ) WENA1 WENB1 ( ) ...

Page 18

DUAL CMOS SyncFIFO 256 x 9, 512 x 9, 1024 x 9, 2048 x 9 and 4096 x 9 OPERATING CONFIGURATIONS SINGLE DEVICE CONFIGURATION — When FIFO A ( Single Device Configuration, the Read Enable 2 ...

Page 19

DUAL CMOS SyncFIFO 256 x 9, 512 x 9, 1024 x 9, 2048 x 9 and 4096 x 9 TWO PRIORITY DATA BUFFER CONFIGURATION The two FIFOs contained in the IDT2801/72811/72821/ 72831/72841 can be used to prioritize two different ...

Page 20

DUAL CMOS SyncFIFO 256 x 9, 512 x 9, 1024 x 9, 2048 x 9 and 4096 x 9 BIDIRIECTIONAL CONFIGURATION The two FIFOs of the IDT2801/72811/72821/72831/72841 can be used to buffer data flow in two directions. In the ...

Page 21

DUAL CMOS SyncFIFO 256 x 9, 512 x 9, 1024 x 9, 2048 x 9 and 4096 x 9 DEPTH EXPANSION — IDT2801/72811/72821/72831/ 72841 can be adapted to applications that require greater than 256/512/1024/2048/4096 words. The existence of double ...

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