3-10

April 1997

HMA510/883

16 x 16-Bit CMOS Parallel

Multiplier Accumulator

Features

• This Circuit is Processed in Accordance to MIL-STD-

883 and is Fully Conformant Under the Provisions of

Paragraph 1.2.1.

• 16 x 16-Bit Parallel Multiplication with Accumulation

to a 35-Bit Result

• High-Speed (55ns) Multiply Accumulate Time

• Low Power CMOS Operation

• HMA510/883 is Compatible with the CY7C510 and the

IDT7210

• Supports Two’s Complement or Unsigned Magnitude

Operations

• Three-State Outputs

Description

The HMA510/883 is a high speed, low power CMOS 16 x

16-bit parallel multiplier accumulator capable of operating at

55ns clocked multiply-accumulate cycles. The 16-bit X and Y

operands may be specified as either two’s complement or

unsigned magnitude format. Additional inputs are provided

for the accumulator functions which include: loading the

accumulator with the current product, adding or subtracting

the accumulator contents and the current product, and pre-

loading the Accumulator Registers from the external inputs.

All inputs and outputs are registered. The registers are all

positive edge triggered, and are latched on the rising edge of

the associated clock signal. The 35-bit Accumulator Output

Register is broken into three parts. The 16-bit least signifi-

cant product (LSP), the 16-bit most significant product

(MSP), and the 3-bit extended product (XTP) Registers. The

XTP and MSP Registers have dedicated output ports, while

the LSP Register shares the Y-inputs in a multiplexed fash-

ion. The entire 35-bit Accumulator Output Register may be

preloaded at any time through the use of the bidirectional

output ports and the preloaded control.

Block Diagram

Ordering Information

PART NUMBER

TEMP.

PACKAGE

PKG.

NO.

HMA510GM-55/883

-55 to 125

68 Ld CPGA

G68.B

HMA510GM-65/883

-55 to 125

68 Ld CPGA

G68.B

HMA510GM-75/883

-55 to 125

68 Ld CPGA

G68.B

REGISTER

SUB

ACC

RND

TC

Y0-15 P0-15

16

16

X0-15

CLKY

CLKX

ACCUMULATOR

XTP REGISTER

MSP REGISTER

LSP REGISTER

PRELOAD

CLKP

3

16

35

MULTIPLIER ARRAY

35

P32-34

16

P16-31

OEX

OEM

OEL

REGISTER

REGISTER

File Number

2807.2

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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