STKM2000 ARCHITECTURE

Technology

T he

S T K M 2000

S e r ies

de v elope d

by

SGS-THOMSON Microelectronics uses an

advanced BICMOS silicon gate process with dual

polysilicon layers and dual metal layers. This

process is optimized to achieve high performance

in digital CMOS applications. Depending on the

operating supply voltage (10V, or 5V), the CMOS

process behaves as an N-WELL technology

(respectively with 2

µ gate length or 1.8 µ gate

length) with operating speeds up to 30MHz.

Thanks to the two metal layers, the digital part of

the circuit can reach high gate density with low

parasitic capacitances.

For analog functions, the STKM2000 series takes

advantage of the bipolar structure:

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very high speed vertical PNP

This allows high gain - bandwith operational

amplifier (50 MHz), low noise input amplifier, short

propagation delay comparator, ...

With

the same BICMOS process, the analog

CMOS performance come from the high density

CMOS structure with a double poly layer for

accurate capacitors, low consumption CMOS

amplifier (30

µA), CMOS switches, high accuracy

switched capacitor filters (up to 100 kHz for center

frequency).

STKM2000 cell concepts

SG S-T H O M SO N

M ic r o el e c t r on i cs

h as

predesigned and precharacterized cells which are

selected, placed and interconnected on the chip to

implement digital and analog cells having different

height and supply voltages. In addition some

macrocells are designed as fixed blocks, so called

“hard blocks” : filters, A/D and D/A converters; some

hard blocks are automatically generated and

parametrized from a compiler: S.C. filters, PLA,

RAM, ROM...

STKM2000 chip topology

The chip is optimized versus the cell complexity, in

a row based structure with different heights.

Peripheral cells surround the internal active chip

area to interface with its external environment.

Despite the row based architecture, “hard blocks”

can be implemented with efficient floor planning

organization.

STKM2000 Cell libraries

SGS-THOMSON Microelectronics introduces the

“programmable” library; instead of working with a

finite number of cells of the library, the designer has

now access to an infinite number of functions.

Defining only some properties, the designer is able

to create himself the cells needed for his

application. For example, the following electrical

parameters are accessible and adjustable:

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gain-bandwith product

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phase margins, frequency compensation

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output buffer current

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biasing currents

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resistor, capacitor fields

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current, source or sink

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adjustable Ron switch resistor

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supply voltage assignment

The analog library is operating in a large voltage

range: 3V to 10V.

The basic analog library contains:

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60 analog CMOS functions

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25 analog BIPOLAR functions

From single transitor to 12 bits A to D converter

(with autocalibration), each setup becomes

possible.

The digital CMOS library uses the same flexibility

with a complete set of basic digital functions

(NAND, NOR, Flip-Flop, ...) and some cell

generators:

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register, counter, logic comparator, ...

More than 60 digital cells are available.

®

STKM2000 SERIES

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