IDT72V805_16 Datasheet, PDF (1/26 Pages) Integrated Device Technology – 3.3 VOLT CMOS DUAL SyncFIFO

3.3 VOLT CMOS DUAL SyncFIFO™
DUAL 256 x 18, DUAL 512 x 18,
DUAL 1,024 x 18, DUAL 2,048 x 18
and DUAL 4,096 x 18
IDT72V805
IDT72V815
IDT72V825
IDT72V835
IDT72V845
FEATURES:
• The IDT72V805 is equivalent to two IDT72V205 256 x 18 FIFOs
• The IDT72V815 is equivalent to two IDT72V215 512 x 18 FIFOs
• The IDT72V825 is equivalent to two IDT72V225 1,024 x 18 FIFOs
• The IDT72V835 is equivalent to two IDT72V235 2,048 x 18 FIFOs
• The IDT72V845 is equivalent to two IDT72V245 4,096 x 18 FIFOs
• Offers optimal combination of large capacity (8K), high speed,
design flexibility, and small footprint
• Ideal for the following applications:
– Network switching
– Two level prioritization of parallel data
– Bidirectional data transfer
– Bus-matching between 18-bit and 36-bit data paths
– Width expansion to 36-bit per package
– Depth expansion to 8,192 words per package
• 10 ns read/write cycle time
• 5V input tolerant
• IDT Standard or First Word Fall Through timing
• Single or double register-buffered Empty and Full Flags
• Easily expandable in depth and width
• Asynchronous or coincident Read and Write Clocks
• Asynchronous or synchronous programmable Almost-Empty
and Almost-Full flags with default settings
• Half-Full flag capability
• Output enable puts output data bus in high-impedance state
• High-performance submicron CMOS technology
• Available in a 128-pin thin quad flatpack (TQFP)
• Industrial temperature range (–40°C to +85°C) is available
• Green parts available, see ordering information
DESCRIPTION:
The IDT72V805/72V815/72V825/72V835/72V845 are dual 18-bit-wide
synchronous (clocked) First-in, First-out (FIFO) memories designed to run
off a 3.3V supply for exceptionally low power consumption. One dual
IDT72V805/72V815/72V825/72V835/72V845 device is functionally equiva-
lent to two IDT72V205/72V215/72V225/72V235/72V245 FIFOs in a single
package with all associated control, data, and flag lines assigned to
independent pins. These devices are very high-speed, low-power First-In,
FUNCTIONAL BLOCK DIAGRAM
WCLKA
WENA
DA0-DA17
FFA/IRA
HFA/(WXOA)
PAEA
EFA/
ORA
WCLKB
LDA _PAFA
WENB
DB0-DB17
LDB
INPUT
REGISTER
OFFSET
REGISTER
WRITE
CONTROL
LOGIC
FLA
WXIA
(HFA)/WXOA
RXIA
RXOA
WRITE
POINTER
EXPANSION
LOGIC
RSA
RESET
LOGIC
RAM
ARRAY
256 x 18
512 x 18
1,024 x 18
2,048 x 18
4,096 x 18
OUTPUT
REGISTER
FLAG
LOGIC
READ
POINTER
READ
CONTROL
LOGIC
INPUT
REGISTER
WRITE
CONTROL
LOGIC
WRITE
POINTER
RAM
ARRAY
256 x 18
512 x 18
1,024 x 18
2,048 x 18
4,096 x 18
EXPANSION
LOGIC
RESET
LOGIC
OUTPUT
REGISTER
OFFSET
REGISTER
FLAG
LOGIC
FFB/IRB
PAFB
EFB/ORB
PAEB
HFB/(WXOB)
READ
POINTER
READ
CONTROL
LOGIC
OEA ^QA0-QA17
RCLKA
RENA
RSB
RXOB
RXIB
(HFB)/WXOB
WXIB
FLB
OEB
QB0-QB17
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc. The SyncFIFO is a trademark of Integrated Device Technology, Inc.
COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES
1
© 2016 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
RCLKB
RENB
4295 drw 01
NOVEMBER 2016
DSC-4295/6