lf3304 LOGIC Devices Incorporated, lf3304 Datasheet

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lf3304

Manufacturer Part Number
lf3304
Description
Dual Line Buffer/fifo
Manufacturer
LOGIC Devices Incorporated
Datasheet

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Part Number:
lf3304QC-12
Manufacturer:
LOGIC
Quantity:
20 000
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 Tol-
erant 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 dis-
tinct modes: Line Buffer and FIFO.
In these modes the two memories
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 1
RAM ARRAY 2
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
FLAG
FLAG
Dual Line Buffer/FIFO
LF3304
9/28/2005–LDS.3304-I
12
12
LF3304
FFA
EFA
PAFA
PAEA
OEA
BOUT
OEB
FFB
EFB
PAFB
PAEB
AOUT
11-0
11-0

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lf3304 Summary of contents

Page 1

... MODE 1-0 RWB DESCRIPTION The LF3304 is a dual line buffer/FIFO, designed to operate at HDTV rates. The LF3304 will operate in two dis- tinct modes: Line Buffer and FIFO. In these modes the two memories can operate independently or with common control. The LF3304 comprises two 12-bit 4K ...

Page 2

... RWA — Reset Write A The write address pointer is reset to the first physical location when RWA is set LOW. After power up, the LF3304 requires a Reset Write for ini- tialization because the write address pointer is not defined at that time. RRA — Reset Read A The read address pointer is reset to the first physical location when RRA is set LOW ...

Page 3

... LF3304 on the rising edge of WCLKB when the device is config- ured for writing. RCLKB — Read Clock B Data is read from the LF3304 and pre- sented on the output port (BOUT after t has elapsed from the rising D edge of RCLKB when the device is configured for reading and the output port is enabled ...

Page 4

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

Page 5

... PAEB register and has no default value. PAEB is synchronized to the rising edge of RCLKB. FIFO MODE OPERATION Initialization Upon power-up, the LF3304 requires the initialization of the internal read and write address pointers. This ini- tialization sequence can be done by either a Flag Enable Reset or a Flag Disable Reset. ...

Page 6

... Ground ≤ V ≤ V (Note 12 Ground ≤ V ≤ V (Note 12) OUT CC (Notes 5, 6) (Note 25° MHz 25° MHz A 6 LF3304 Dual Line Buffer/FIFO Voltage Supply 3.00V ≤ V ≤ 3.60V CC 3.00V ≤ V ≤ 3.60V CC Min Typ Max Unit 2.4 V 0.4 V 2.0 5 ...

Page 7

... Skew Time Between Read and Write Clocks for PAEx and PAFx SKEW2 *C - Available in Commercial Temperature Range ( Available in Industrial Temperature Range (- Notes 9, 10 (ns) PERATING ANGES C to +70 ° +85 ° 7 Dual Line Buffer/FIFO LF3304 - Available Speed and Temperature Min Max Min Max ...

Page 8

... PWL t CYC RENA t AC RENB AOUT 11–0 (n–2) (n–1) BOUT 11– SKEW1 WCLKA WCLKB RRA = RRB = HIGH OEA = OEB = LOW t t WES WEH (n+1) t RES t REH (n) (n+ REF REF 8 LF3304 Dual Line Buffer/FIFO (n+2) (n+ WFF WFF (n+2) (n+3) Video Imaging Products 9/28/2005–LDS.3304-I ...

Page 9

... ROGRAMMABLE LAG OAD WCLKA WCLKB AIN 11–0 PAEx BIN 11–0 ADDRA ADDRB t LDS LDA LDB WENA WENB (n+1) (n+ (n) (n+1) IMING PAFx t LDH 9 Dual Line Buffer/FIFO t RH (0) (1) (n+2) (0) (0) Video Imaging Products LF3304 (1) 9/28/2005–LDS.3304-I ...

Page 10

... LMOST MPTY WCLKA WCLKB PAEA PAEB RCLKA RCLKB UTPUT NABLE AND ISABLE OEA OEB AOUT 11–0 BOUT 11–0 F LAG t PAF F LAG t t PAE SKEW2 t OHZ 10 Dual Line Buffer/FIFO t PAF t SKEW2 t PAE t OLZ HIGH IMPEDANCE Video Imaging Products 9/28/2005–LDS.3304-I LF3304 ...

Page 11

... Responses from the internal circuitry are specified from the point of view of the device. Output delay, for example, is specified as a maximum since worst- 11 LF3304 Dual Line Buffer/FIFO case operation of any device always provides data within that time. 11. For the t test, the transition is ENA measured to the 1 ...

Page 12

... BIN 25 8 BIN 26 9 BIN 27 10 BIN 28 11 GND 29 VCC 30 Plastic Quad Flatpack (Q2) S CREENING LF3304QC15 LF3304QC15G (GREEN) LF3304QC12 LF3304QC12G (GREEN) LF3304QC10 LF3304QC10G (GREEN) S CREENING LF3304QI10 12 LF3304 Dual Line Buffer/FIFO 80 VCC 79 GND 78 AOUT 0 77 AOUT 1 76 AOUT 2 75 AOUT 3 74 AOUT ...

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