LF3304 Datasheet, PDF (1/12 Pages) LOGIC Devices Incorporated – Dual Line Buffer/FIFO

DEVICES INCORPORATED
DEVICES INCORPORATED
LF3304
Dual Lin_Le _FBu₃ff₃er₀/F₄IFO
Dual Line Buffer/FIFO
FEATURES
u 100 MHz Data Rate for Video and
other High-Speed Applications
u One 24-bit, Two 12-bit, Three
8-bit Data Paths, or One Double
Depth 12-bit
u Dual Modes: Line Buffer or FIFO
u User-Programmable FIFO Flags
u User-Resettable Read and Write
Pointers
u Single 3.3 V Power Supply,
5 V Tolerant I/O
u 100-lead PQFP
LF3304 BLOCK DIAGRAM
DESCRIPTION
The LF3304 is a dual line buffer/
FIFO, designed to operate at HDTV
rates. The LF3304 will operate in
two distinct modes: Line Buffer and
FIFO. In these modes the two memo-
ries can operate independently or
with common control.
The LF3304 comprises two 12-bit 4K
memories configurable in a variety of
ways including: Two 12-bit 4K deep
line buffers (independent lengths),
Three 8-bit 4K deep line buffers
(common lengths), One 12-bit 8K
deep line buffer, or Two 12-bit 4K
FIFOs (independent operation).
In FIFO mode, independent Read
and Write Resets give the designer
control over the internal pointers
providing flexibility not commonly
found in ordinary FIFOs.
The LF3304 operatates at a maximum
data rate of 100 MHz and is available
in a 100-lead PQFP package.
12
AIN11-0
ADDRA
LDA
12
LENGTH11-0
ADDRB
LDB
12
BIN11-0
2
MODE1-0
WCLKA
RCLKA
WENA
RENA
RRA
RWA
MASTER
CONTROL
WCLKB
RCLKB
WENB
RENB
RRB
RWB
RAM ARRAY 1
CONTROL
FLAG
GENERATOR
VARIABLE LENGTH RAM ARRAY A
4K x 12-bit
FFA
EFA
PAFA
PAEA
OEA
12
AOUT11-0
VARIABLE LENGTH RAM ARRAY B
4K x 12-bit
RAM ARRAY 2
CONTROL
FLAG
GENERATOR
12
BOUT11-0
OEB
FFB
EFB
PAFB
PAEB
Video Imaging Products
1
08/16/2000–LDS.3304-F