LF3304QC12 LODEV [LOGIC Devices Incorporated], LF3304QC12 Datasheet

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LF3304QC12

Manufacturer Part Number
LF3304QC12
Description
Dual Line Buffer/FIFO
Manufacturer
LODEV [LOGIC Devices Incorporated]
Datasheet
DEVICES INCORPORATED
LENGTH
FEATURES
LF3304 B
DEVICES INCORPORATED
100 MHz Data Rate for Video and
other High-Speed Applications
One 24-bit, Two 12-bit, Three
8-bit Data Paths, or One Double
Depth 12-bit
Dual Modes: Line Buffer or FIFO
User-Programmable FIFO Flags
User-Resettable Read and Write
Pointers
Single 3.3 V Power Supply,
5 V Tolerant I/O
100-lead PQFP
MODE
ADDRA
ADDRB
AIN
BIN
LDA
LDB
11-0
11-0
11-0
1-0
12
12
12
2
LOCK
D
IAGRAM
CONTROL
MASTER
WCLKA
WCLKB
RCLKA
RCLKB
WENA
WENB
RENA
RENB
RWA
RWB
RRA
RRB
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
DESCRIPTION
RAM ARRAY 2
RAM ARRAY 1
CONTROL
CONTROL
VARIABLE LENGTH RAM ARRAY A
VARIABLE LENGTH RAM ARRAY B
1
4K x 12-bit
4K x 12-bit
Dual Line Buffer/FIFO
(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.
Video Imaging Products
GENERATOR
GENERATOR
Dual Line Buffer/FIFO
FLAG
FLAG
LF3304
08/16/2000–LDS.3304-F
12
12
LF3304
FFA
EFA
PAFA
PAEA
OEA
AOUT
BOUT
OEB
FFB
EFB
PAFB
PAEB
11-0
11-0

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LF3304QC12 Summary of contents

Page 1

DEVICES INCORPORATED DEVICES INCORPORATED FEATURES 100 MHz Data Rate for Video and other High-Speed Applications One 24-bit, Two 12-bit, Three 8-bit Data Paths, or One Double Depth 12-bit Dual Modes: Line Buffer or FIFO User-Programmable FIFO Flags User-Resettable Read and ...

Page 2

DEVICES INCORPORATED LINE BUFFER MODE SIGNAL DEFINITIONS Power V and GND CC +3.3 V power supply. All pins must be connected. Clocks WCLKA — Write Clock A WCLKA and RCLKA must be tied together for RAM Array A to properly ...

Page 3

DEVICES INCORPORATED RWB — Reset Write B See RWA Description. RRB — Reset Read B See RRA description. OEA — Output Enable A When OEA is LOW, AOUT is 11-0 enabled for output. When OEA is HIGH, AOUT is placed ...

Page 4

DEVICES INCORPORATED LDB — RAM Array B Load When LDB is LOW, data on BIN 11-0 latched in the LF3304 on the rising edge of WCLKB. WENA — Write Enable A If WENA is LOW, data on AIN is 11-0 ...

Page 5

DEVICES INCORPORATED FIFO MODE OPERATION Initialization Upon power-up, the LF3304 requires the initialization of the internal read and write address pointers. This initialization sequence can be done by either a Flag Enable Reset or a Flag Disable Reset. A Flag ...

Page 6

DEVICES INCORPORATED M R Above which useful life may be impaired (Notes AXIMUM ATINGS Storage temperature ............................................................................................................. –65°C to +150°C Operating ambient temperature ............................................................................................. –55°C to +125°C V supply voltage with respect to ground ............................................................................ –0.5 ...

Page 7

DEVICES INCORPORATED SWITCHING CHARACTERISTICS OMMERCIAL PERATING ANGE Symbol Parameter t Cycle Time CYC t Clock Pulse Width High PWH t Clock Pulse Width Low PWL t Data Setup Time DS t Data Hold Time DH t Write ...

Page 8

DEVICES INCORPORATED RITE YCLE IMING WCLKA WCLKB t t PWH PWL t CYC WENA WENB AIN 11–0 (n) BIN 11– SKEW1 RCLKA RCLKB RWA = RWB = HIGH ...

Page 9

DEVICES INCORPORATED RITE ESET IMING WCLKA WCLKB RWA RWB AIN 11–0 (n-1) (n) BIN 11–0 WENA = WENB = LOW EAD ESET IMING RCLKA RCLKB RRA RRB t AC AOUT 11–0 (n–2) (n–1) BOUT ...

Page 10

DEVICES INCORPORATED ROGRAMMABLE LMOST ULL WCLKA WCLKB PAFA PAFB RCLKA RCLKB ROGRAMMABLE LMOST MPTY WCLKA WCLKB PAEA PAEB t PAE RCLKA RCLKB UTPUT NABLE AND ISABLE OEA OEB AOUT 11–0 ...

Page 11

DEVICES INCORPORATED NOTES 1. Maximum Ratings indicate stress specifications only. Functional oper- ation of these products at values beyond those indicated in the Operating Condi- tions table is not implied. Exposure to maximum rating conditions for ex- tended periods may ...

Page 12

... BIN 23 6 BIN 24 7 BIN 25 8 BIN 26 9 BIN 27 10 BIN 28 11 GND 29 VCC 30 Plastic Quad Flatpack (Q2) S CREENING LF3304QC15 LF3304QC12 LF3304QC10 12 LF3304 Dual Line Buffer/FIFO 80 VCC 79 GND 78 AOUT 0 77 AOUT 1 76 AOUT 2 75 AOUT 3 74 AOUT 4 73 AOUT 5 72 AOUT ...

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