©2001 Silicon Storage Technology, Inc.

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The SST logo and SuperFlash are registered trademarks of Silicon Storage Technology, Inc.

MPF is a trademark of Silicon Storage Technology, Inc. Intel is a registered trademark of Intel Corporation.

These specifications are subject to change without notice.

Advance Information

FEATURES:

•

Standard LPC Interface

– Conforms to Intel LPC Interface Specification 1.0

•

Organized as 256K x8

•

Flexible Erase Capability

– Uniform 4 KByte sectors

– Uniform 16 KByte overlay blocks

– 16 KBytes Top boot block protection

– Chip-Erase for PP Mode

•

Single 3.0-3.6V Read and Write Operations

•

Superior Reliability

– Endurance: 100,000 Cycles (typical)

– Greater than 100 years Data Retention

•

Low Power Consumption

– Active Read Current: 10 mA (typical)

– Standby Current: 10 µA (typical)

•

Fast Sector-Erase/Byte-Program Operation

– Sector-Erase Time: 18 ms (typical)

– Block-Erase Time: 18 ms (typical)

– Chip-Erase Time: 70 ms (typical)

– Byte-Program Time: 14 µs (typical)

– Chip Rewrite Time: 4 seconds (typical)

– Single-pulse Program or Erase

– Internal timing generation

•

Two Operational Modes

– Low Pin Count (LPC) Interface mode for

in-system operation

– Parallel Programming (PP) Mode for fast production

programming

•

LPC Interface Mode

– 5-signal communication interface supporting

byte Read and Write

– 33 MHz clock frequency operation

– WP# and TBL# pins provide hardware write protect

for entire chip and/or top boot block

– Standard SDP Command Set

– Data# Polling and Toggle Bit for

End-of-Write detection

– 5 GPI pins for system design flexibility

•

Parallel Programming (PP) Mode

– 11 pin multiplexed address and

8 pin data I/O interface

– Supports fast In-System or PROM programming

for manufacturing

•

CMOS I/O Compatibility

•

Packages Available

– 32-lead PLCC

– 32-lead TSOP (8mm x 14mm)

PRODUCT DESCRIPTION

The SST49LF020 flash memory device is designed to

interface with the LPC bus for PC and Internet Applicance

applications. It provides protection for the storage and

update of code and data in addition to adding system

design flexibility through five General Purpose Inputs (GPI).

The SST49LF020 is in compliance with Intel Low Pin

Count (LPC) Interface Specification 1.0. Two interface

modes are supported: LPC Mode for In-System program-

ming and Parallel Programming (PP) Mode for fast factory

programming.

The SST49LF020 flash memory device is manufactured

with SST’s proprietary, high performance SuperFlash

Technology. The split-gate cell design and thick oxide

tunneling injector attain better reliability and manufactura-

bility

compared

with

alternate

approaches.

The

SST49LF020 device significantly improves performance

and reliability, while lowering power consumption. The

SST49LF020 device writes (Program or Erase) with a

single 3.0-3.6V power supply. It uses less energy during

Erase and Program than alternative flash memory tech-

nologies. The total energy consumed is a function of the

applied voltage, current and time of application. Since for

any give voltage range, the SuperFlash technology uses

less current to program and has a shorter erase time, the

total energy consumed during any Erase or Program

operation is less than alternative flash memory technolo-

gies. The SST49LF020 product provides a maximum

Byte-Program time of 20µsec. The entire memory can be

erased and programmed byte-by-byte typically in 4 sec-

onds, when using status detection features such as Tog-

gle Bit or Data# Polling to indicate the completion of

Program operation. The SuperFlash technology provides

fixed Erase and Program time, independent of the num-

ber of Erase/Program cycles that have performed. There-

fore the system software or hardware does not have to

be calibrated or correlated to the cumulative number of

Erase/Program cycles as is necessary with alternative

flash memory technologies, whose Erase and Program

time increase with accumulated Erase/Program cycles.

To protect against inadvertent write, the SST49LF020

device has on-chip hardware and software data (SDP)

protection schemes. It is offered with a typical endurance

of 100,000 cycles. Data retention is rated at greater than

100 years.

2 Megabit LPC Flash

SST49LF020

SST49LF0202 Mb LPC Flash