FEATURES:

• 16 x 16 parallel multiplier/accumulator with selectable

accumulation and subtraction

• High-speed - 35ns multiply/accumulate time

• IDT721 0 features selectable accumulation, subtraction and

rounding and preloading with 35-bit result

• IDT7243 features selectable accumulation, subtraction and

rounding with 19-bit result

• IDT7210 is pin and functionally compatible with the

TRW TDC1010J

• IDT7243 is pin and functionally compatible with the

TRWTDC1043

• Both devices perform subtraction and double precision

addition and multiplication

• Produced using advanced CEMOS'· high-performance

technology

• Low-power consumption (less than 250mW typical) - less

than 1110 the power of compatible bipolar and 117 the power

of NMOS designs

• Input and output directly TTL-compatible

• Single 5V supply

• Available in topbraze DIP, SHRINK-DIp, plastic DIP, LCC,

Fine-Pitch LCC, PLCC and Flatpack

• Military product available 100% screened to MIL-STD-883,

Class B

DESCRIPTION:

The IDT7210/IDT7243 are high-speed, low-power 16 x 16

parallel multiplier/accumulators that are ideally suited for real-

time digital signal processing applications. Fabricated using

CEMOS silicon gate technology, these devices offer a very low-

power alternative to existing bipolar and NMOS counterparts,

with only 117 to 1/10the power dissipation and exceptional speed

(35ns maximum) performance.

Pin and functional replacements for TRW's TDC1010JITOC-

1043, the IDT721017243 operate from a single 5 volt supply and

are compatible with standard TTL logic levels. The architecture

ofthe IDT721 017243 is farily straightforward, featuring individual

input and output registers with clocked D-type flip-flops, a pre-

load capability (IDT7210 only) which enables input data to be

preloaded into the output registers, individual three-state output

ports for the extended product (XTP) and most significant

product (MSP), and a least significant product output (LSP)

whic\:l is multiplexed with the Y input. Unlike the IDT7210, the

1DT7243 does not have either a preload capability or a least

significant product (LSP) output accessible externally.

The XIN and YIN data input registers may be specified through

the use of the two's complement input (TC) as either two's

complement or an unsigned magnitude, yielding a full-precision

32-bit result that may be accumulated to a full 35-bit result. The

Continued on Page 2

FUNCTIONAL BLOCK DIAGRAMS

CLKV YIN (Y15 - YolP15 - PO)

Ace, SUB,

CLKX X'H(X,!> - Xo) RND, TC

CLKY VIN(V1S - Vol

TSX

XTPOUT

(P34 ·P32)

MSPOUT

(P31.P16)

IDT7210

DSP721 0-001

3

XTPOUT

(P34-P32)

CEMOS is a trademark of Integrated Device Technology, Inc.

MILITARY AND COMMERCIAL TEMPERATURE RANGES

101986 Integrated Device Technology, Inc.

4-42

TSM

IDT7243

DSP721 0-002

JULY 1986

Printed in U.S.A.