FG256 datasheet(5/108 Pages) ACTEL

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SX-A Family FPGAs

v5.3

1-1

General Description

Introduction

The Actel SX-A family of FPGAs offers a cost-effective,

single-chip solution for low-power, high-performance

designs. Fabricated on 0.22

μm / 0.25 μm CMOS

antifuse technology and with the support of 2.5 V,

3.3 V and 5 V I/Os, the SX-A is a versatile platform to

integrate designs while significantly reducing time-

to-market.

SX-A Family Architecture

The SX-A family’s device architecture provides a unique

approach to module organization and chip routing that

satisfies performance requirements and delivers the most

optimal

mix

for

wide

variety

applications.

Interconnection between these logic modules is achieved

using Actel’s patented metal-to-metal programmable

antifuse

interconnect

elements

(Figure 1-1).

The

antifuses

are

normally

open

circuit

and,

when

programmed,

form

permanent

low-impedance

connection.

Note: The A54SX72A device has four layers of metal with the antifuse between Metal 3 and Metal 4. The A54SX08A, A54SX16A, and

A54SX32A devices have three layers of metal with the antifuse between Metal 2 and Metal 3.

Figure 1-1 • SX-A Family Interconnect Elements

Silicon Substrate

Metal 4

Metal 3

Metal 2

Metal 1

Amorphous Silicon/

Dielectric Antifuse

Tungsten Plug Via

Tungsten Plug Contact

Routing Tracks

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