LMA2009JC45 datasheet(2/7 Pages) LODEV

Part #	LMA2009JC45

Description	12 x 12-bit Multiplier-Accumulator

Download	7 Pages

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Manufacturer	LODEV [LOGIC Devices Incorporated]

Direct Link	http://www.logicdevices.com

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2 / 7 page

DEVICES INCORPORATED

Multiplier-Accumulators

03/29/2000–LDS.10/2009-L

2

LMA 1009/2009

12 x 12-bit Multiplier-Accumulator

TABLE 1. PRELOAD TRUTH TABLE

PREL = Preload data to appropriate register

OUT = Register available on output pins

Z

= High impedance state

PREL OEX

OEM

OEL

XTR

MSR LSR

L

OUT

L

H

OUT

Z

L

H

L

OUT

Z

OUT

L

H

OUT

Z

L

H

L

Z

OUT

L

H

L

H

Z

OUT

Z

L

H

L

Z

OUT

LH

H

Z

HL

L

Z

H

L

H

Z

PREL

H

L

H

L

Z

PREL

Z

H

L

H

Z

PREL PREL

H

L

PREL

Z

H

L

H

PREL

Z

PREL

H

L

PREL PREL

Z

H

PREL PREL PREL

FIGURE 1A.INPUT FORMATS

11 10 9

2

1

0

–2

0

(Sign)

2

–1 2–2

2

–9 2–10 2–11

11 10 9

2

1

0

–2

0

(Sign)

2

–1 2–2

2

–9 2–10 2–11

Fractional Two’s Complement (TC = 1)

11 10 9

2

1

0

–2

11

(Sign)

2

10

2

9

2

1

2

0

11 10 9

2

1

0

–2

11

(Sign)

2

10

2

9

2

1

2

0

Integer Two’s Complement (TC = 1)

11 10 9

2

1

0

2

–1 2–2 2–3

2

–10 2–11 2–12

11 10 9

2

1

0

2

–1 2–2 2–3

2

–10 2–11 2–12

Unsigned Fractional (TC = 0)

11 10 9

2

1

0

2

11 210 29

2

1

2

0

11 10 9

2

1

0

2

11 210 29

2

1

2

0

Unsigned Integer (TC = 0)

AIN

BIN

FIGURE 1B.OUTPUT FORMATS

23 22 21

14 13 12

2

1

2

0

2

–1

2

–8 2–9 2–10

26 25 24

–2

4

(Sign)

2

3

2

Fractional Two’s Complement

Integer Two’s Complement

Unsigned Fractional

Unsigned Integer

MSR

LSR

23 22 21

14 13 12

2

23 222 221

2

14 213 212

23 22 21

14 13 12

2

–1 2–2 2–3

2

–10 2–11 2–12

23 22 21

14 13 12

2

23 222 221

2

14 213 212

11 10 9

2

1

0

2

–11 2–12 2–13

2

–20 2–21 2–22

XTR

26 25 24

–2

26

(Sign)

2

25

2

24

11 10 9

2

1

0

2

11 210 29

2

1

2

0

26 25 24

2

1

2

0

11 10 9

2

1

0

2

–13 2–14 2–15

2

–22 2–23 2–24

26 25 24

2

26

2

25

2

24

11 10 9

2

1

0

2

11 210 29

2

1

2

0

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