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Integrated Device Technology Electronic Components Datasheet

IDT7209L Datasheet

12 x 12 Parallel CMOS Multiplier Accumulator

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FEATURES:
• 12 x 12 parallel multiplier/accumulator with selectable
accumulation and subtraction
• High-speed - 30ns maximum multiply/accumulate time
• Selectable accumulation, subtraction, rounding and
preloading with 27-bit result
• Pin and functionally compatible with the TRW TDC1009J
• Performs subtraction and double precision addition and
multiplication
• Produced using advanced CEMOS'·
high-performance technology
• Low-power consumption (less than 150mW typical) - less
than 1/10 the power of compatible bipolar
• Inputs and outputs directly TTL-compatible
• Single 5V supply
• Available in DIP, SHRINK-DIP, plastic DIP or LCC
• Military product available 100% screened to MIL-STD-883,
Class B
FUNCTIONAL BLOCK DIAGRAM
ClKY YIN (Y11 - Yol
MULTIPLIER
ARRAY
DESCRIPTION:
The IDT7209 is a high-speed, low-power 12 x 12 parallel
multiplier/accumulator that is ideally suited for real-time digital
signal processing applications. Fabricated using IDT's CEMOS
silicon gate technology, this device offers a very low-power alter-
native to existing bipolar and NMOS counterparts, with only 1/10
the power dissipation and exceptional speed (30ns maximum)
performance.
A pin and functional replacement for TRW's TDC1009J. the
IDT7209 operates from a single 5 volt supply and is compatible
with standard TTL logic levels. The architecture of the IDT7209 is
fairly straightforward, featuring individual input and output
registers with clocked D-type flip-flops. a preload capability
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 (LSP) output.
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
24-bit result that may be accumulated to a full 27-bit result. The
three output registers-extended product (XTP), most significant
product (MSP) and least significant product (LSP)-are con-
trolled by the respective TSX. TSM and TSL input lines.
The accumulate input (ACC) enables the device to perform
either a multiply or a mUltiply-accumulate function. In the
mUltiply-accumulate mode, output data can be added to or
subtracted from subsequent results. When the subtraction (SUB)
input is active simultaneously with an active ACC, a subtraction
can be performed. The double precision accumulated result is
rounded down to either a single preCision or single precision plus
3-bitextended result. In the multiply mode, the extended product
output (XTP) is sign extended in the two's complement mode or
set to zero in the unsigned mode. The ROUND (RND) control
rounds up the most significant product (MSP) and the 3-bit
extended product (XTP) outputs. When preload input (PREL) is
active, all the output buffers are forced into a high-impedance
state (see PRELOAD truth table) and external data can be loaded
into the output register by using the TSX, TSL and TSM signals as
input controls.
TSX TSl
IDT7209
LSPOUT
(P11- po)
DSP7209-001
CEMOS is a trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
.1986 Integrated Device Technology, Inc.
4-35
JULY 1986
Printed in U.S.A.


Integrated Device Technology Electronic Components Datasheet

IDT7209L Datasheet

12 x 12 Parallel CMOS Multiplier Accumulator

No Preview Available !

IDT7209L 12 x 12 PARALLEL CMOS MULTIPLIER-ACCUMULATOR
PIN CONFIGURATIONS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DIP
TOP VIEW
DSP7209-002
DSP72Q9..-015
SHRINK-DIP
TOP VIEW
>
~~~~~~~~~~~~~~>~dill:
• • • • •~ nN~m~~~~~~~
TSX 10
P26
p..
1"2
p.. 13
P23 14
p.. 15
P21 16
POD 17
P19 16
P1S 19
P17 20
P'6 21
P15 22
P14 23
P13 24
P12 25
TSM 26
60 CLKX
59 X"
58 X,D
57 Xg
56 Xs
55 X7
54 Xe
53 X5
52 ~
51 X3
50 X2
49 X1
48 Xo
47 ACC
48 SUB
45 RND
44 TSL
~rereg~~~~~~~~~~~~~
~~~l~~~~~~~~~~~~~
lEd CI CICI
LCC
TOP VIEW
DSP7209-003
4-36


Part Number IDT7209L
Description 12 x 12 Parallel CMOS Multiplier Accumulator
Maker IDT
Total Page 7 Pages
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