LF2249 LODEV [LOGIC Devices Incorporated], LF2249 Datasheet

no-image

LF2249

Manufacturer Part Number

LF2249

Description

12 x 12-bit Digital Mixer

Manufacturer

LODEV [LOGIC Devices Incorporated]

Datasheet

1.LF2249.pdf (8 pages)

Current page: 1 of 8
Download datasheet (73Kb)

DEVICES INCORPORATED

DEVICES INCORPORATED

FEATURES

LF2249 B

40 MHz Data and Computation Rate

Two 12 x 12-bit Multipliers with

Individual Data Inputs

Separate 16-bit Input Port for

Cascading Devices

Independent, User-Selectable 1–16

Clock Pipeline Delay for Each Data

Input

User-Selectable Rounding of Products

Fully Registered, Pipelined

Architecture

Three-State Outputs

Fully TTL Compatible

Replaces TRW/Raytheon/Fairchild

TMC2249

120-pin PQFP

NOTE: NUMBERS IN REGISTERS INDICATED

CAS

CASEN

SWAP

NEG

RND

NUMBER OF PIPELINE DELAYS.

CLK

15-0

OE

FT

LOCK

1

D

4

4

IAGRAM

16

ADEL

3-0

A

1–16

11-0

ENA

3

2's COMP

The LF2249 is a high-speed digital

mixer comprised of two 12-bit

multipliers and a 24-bit accumulator.

All multiplier inputs are user acces-

sible, and each can be updated on

every clock cycle. The LF2249 utilizes

a pipelined architecture with fully

registered inputs and outputs and an

asynchronous three-state output

enable control for optimum flexibility.

Independent input register clock

enables allow the user to hold the

data inputs over multiple clock cycles.

Each multiplier input also includes a

user-selectable 1-16 clock pipeline

delay. The output of each multiplier

can be independently negated under

DESCRIPTION

BDEL

3-0

B

16

1–16

11-0

MS

ENB

1

16

16

1

S

2 : 1

15-0

0

CDEL

3-0

C

1–16

11-0

24

12 x 12-bit Digital Mixer

ENC

0

2's COMP

2 : 1

16

user control for subtraction of prod-

ucts. The sum of the products can

also be internally rounded to 16 bits

during the accumulation process.

A separate 16-bit input port con-

nected to the accumulator is included

to allow cascading of multiple

LF2249s. Access to all 24 bits of the

accumulator is gained by switching

between upper or lower 16-bit words.

The accumulated output data is

updated on every clock cycle.

All inputs and outputs of the LF2249

are registered on the rising edge of

clock, except for OE. Internal pipeline

registers for all data and control

inputs are provided to maintain

1

DDEL

Video Imaging Products

LS

12 x 12-bit Digital Mixer

3-0

D

1–16

11-0

END

LF2249

4

4

08/16/2000–LDS.2249-J

LF2249

NEG

ACC

2

10

11

1

2

3

4

5

6

7

8

9

Related parts for LF2249

Related keywords

LF2249 datasheet
LF2249 data sheet
LF2249 pdf datasheet
LF2249 component
LF2249 part
LF2249 distributor
LF2249 RoHS
LF2249 datasheet download