3-29

April 1997

HMU16/883

16 x 16-Bit CMOS Parallel Multiplier

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 Multiplier with Full 32-Bit Product

• High-Speed (45ns) Clocked Multiply Time

• Low Power CMOS Operation

• HMU16/883 is Compatible with the AM29516, LMU16,

IDT7216, and the CY7C516

• Supports Two’s Complement, Unsigned Magnitude

and Mixed Mode Multiplication

• TTL Compatible Inputs/Outputs

• Three-State Outputs

Description

The HMU16/883 is a high speed, low power CMOS 16 x 16-bit

parallel multiplier ideal for fast, real time digital signal pro-

cessing applications. The 16-bit X and Y operands may be

independently specified as either two’s complement or

unsigned magnitude format, thereby, allowing mixed mode

multiplication operations.

Additional inputs are provided to accommodate format

adjustment and rounding of the 32-bit product. The Format

Adjust control allows the user to select a 31-bit product with

the sign bit replicated in the LSP. The round control provides

for rounding the most significant portion of the result by add-

ing one to the most significant bit of the LSP.

Two 16-bit Output Registers (MSP and LSP) are provided to

hold the most and least significant portions of the result,

respectively. These registers may be made transparent for

asynchronous operation through the use of the Feedthrough

Control (FT). The two halves of the product may be routed to

a single 16-bit three-state output port via the output multi-

plexer control, and in addition, the LSP is connected to the Y-

input port through a separate three-state buffer.

The HMU16/883 utilizes independent clock signals (CLKX,

CLKY, CLKL, CLKM) to latch the input operands and output

Product Registers. This configuration maximizes throughput

and simplifies bus interfacing. All outputs of the HMU16/883

also offer three-state control for multiplexing onto multi-use

system busses.

Functional Diagram

Ordering Information

PART NUMBER

TEMP. RANGE

PACKAGE

PKG.

NO.

HMU16GM-45/883

-55 to 125

68 Ld CPGA

N68.95

HMU16GM-60/883

-55 to 125

68 Ld CPGA

N68.95

MSP

REGISTER

LSP

REGISTER

MULTIPLEXER

TCX

RND

TCY

CLKX

CLKY

FT

CLKM

CLKL

OEL

FA

MSPSEL

MULTIPLIER ARRAY

FORMAT ADJUST

P16-31/P0-15

OEP

X0-15

Y0-15/P0-15

REGISTER

REGISTER

REGISTER

File Number

2804.2

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

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