Datasheet > LMA1010

LMA1010

更新时间： 2024-09-23 22:31:11

品牌	Logo	应用领域
逻辑 - LOGIC		/
页数	文件大小	规格书
7页	195K
描述
16 x 16-bit Multiplier-Accumulator

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LMA1010 数据手册

LMA1010/2010

DEVICES INCORPORATED

16 x 16-bit Multiplier-Accumulator

LMA1010/2010

16 x 16-bit Multiplier-Accumulator

DEVICES INCORPORATED

FEATURES

DESCRIPTION

The LMA1010 and LMA2010 are TC, ACC, and SUB controls are latched

high-speed, low power 16-bit on the rising edge of the logical OR of

multiplier-accumulators. The LMA1010 CLK A and CLK B. TC specifies the

and LMA2010 are functionally identical; input as two’s complement

❑ 20 ns Multiply-Accumulate Time

❑ Replaces Fairchild TMC2210,

Cypress CY7C510, IDT 7210L,

and AMD Am29510

they differ only in packaging. Full mili- (TC HIGH) or unsigned magnitude

tary ambient temperature range opera- (TC LOW). RND, when HIGH, adds ‘1’

tion is achieved with advanced CMOS to the most significant bit position of

❑ Two’s Complement or Unsigned

Operands

❑ Accumulator Performs Preload,

technology.

the least significant half of the product.

Subsequent truncation of the 16 least

significant bits produces a result

correctly rounded to 16-bit preci-

sion.

Accumulate, and Subtract

The LMA1010 and LMA2010 produce

the 32-bit product of two 16-bit numbers.

The results of a series of multiplications

may be accumulated to form the sum of

❑ Three-State Outputs

❑ 68-pinPLCC, J-Lead

products. Accumulation is performed to ACC and SUB control accumulator

35-bitprecisionwiththemultiplierprod- operation. ACC HIGH results in

uct sign extended as appropriate.

addition of the multiplier product and

the accumulator contents, with the result

stored in the accumulator register on the

rising edge of CLK R. ACC and SUB

HIGH results in subtraction of the

accumulator contents from the

multiplierproduct,withtheresult stored

in the accumulator register. With ACC

LOW and SUB LOW, no accumulation

occurs and the next product is loaded

directly into the accumulator register.

ACC LOW and SUB HIGH is undefined.

Data present at the A and B input regis-

ters is latched on the rising edges of

CLK A and CLK B respectively. RND,

LMA1010/2010 BLOCK DIAGRAM

15-0

CLK A

CLK B

A REGISTER

B REGISTER

The LMA1010/2010 output register

(accumulator register) is divided into

three independently controlled sec-

tions. The least significant result

(LSR) and most significant result

(MSR) registers are 16 bits in length.

The extended result register (XTR) is

3 bits long. The output signals R15-0

and input signals B15-0 share the same

bidirectional pins.

RND

ACC

SUB

R + A

R – A

OEX

LEX

LEM

LEL

PASS R

PRELOAD

CONTROL

LOGIC

OEM

OEL

PREL

Each output register has an indepen-

dent output enable control. In addition

to providing three-state control of the

outputbuffers, whenOEX, OEM, orOEL

areHIGHandPRELisHIGH,datacanbe

preloaded via the bidirectional output

pins into the respective output registers.

Data present on the output pins is

latched onthe rising edge of CLK R. The

interrelation of PREL and the enable

controls is summarized in Table 1.

OEX

OEM

OEL

LEX

LEM

LEL

CLK R

ACCUMULATOR REGISTER

OEX

OEM

OEL

34-32

R31-16

Multiplier-Accumulators

08/16/2000–LDS.10/2010-P

12 3 4 5 6 7

中文翻译

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与LMA1010相关器件

型号	品牌	获取价格	描述	数据表
LMA1010DC	LOGIC	获取价格	Multiplier Accumulator/Summer, CMOS, CDIP64
LMA1010DC45	LOGIC	获取价格	Multiplier Accumulator/Summer, 16-Bit, CMOS, CDIP64, SIDE BRAZED, HERMETIC SEALED, DIP-64
LMA1010DC55	LOGIC	获取价格	Multiplier Accumulator/Summer, 16-Bit, CMOS, CDIP64, SIDE BRAZED, HERMETIC SEALED, DIP-64
LMA1010DC65	LOGIC	获取价格	Multiplier Accumulator/Summer, 16-Bit, CMOS, CDIP64, SIDE BRAZED, HERMETIC SEALED, DIP-64
LMA1010DM55	LOGIC	获取价格	Multiplier Accumulator/Summer, 16-Bit, CMOS, CDIP64, SIDE BRAZED, HERMETIC SEALED, DIP-64
LMA1010DM65	LOGIC	获取价格	Multiplier Accumulator/Summer, 16-Bit, CMOS, CDIP64, SIDE BRAZED, HERMETIC SEALED, DIP-64
LMA1010DM75	LOGIC	获取价格	Multiplier Accumulator/Summer, 16-Bit, CMOS, CDIP64, SIDE BRAZED, HERMETIC SEALED, DIP-64
LMA1010DMB75	LOGIC	获取价格	Multiplier Accumulator/Summer, 16-Bit, CMOS, CDIP64, SIDE BRAZED, HERMETIC SEALED, DIP-64
LMA1010DME55	ETC	获取价格	Multiplier/Accumulator
LMA1010DME65	ETC	获取价格	Multiplier/Accumulator

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