Datasheet

8 Mbit LPC Flash

SST49LF080A

Data Sheet

Microchip Technology Company

Product Description

The SST49LF080A flash memory device is designed to interface with the LPC bus for PC and Internet

Appliance application in compliance with Intel Low Pin Count (LPC) Interface Specification 1.0. Two

interface modes are supported: LPC mode for in-system operations and Parallel Programming (PP)

mode to interface with programming equipment.

The SST49LF080A 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 reli-

ability and manufacturability compared with alternate approaches. The SST49LF080A device signifi-

cantly improves performance and reliability, while lowering power consumption. The SST49LF080A

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 technologies. The total energy consumed is a function of

the applied voltage, current and time of application. For any give voltage range, the SuperFlash tech-

nology 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 technologies. The

SST49LF080A product provides a maximum Byte-Program time of 20 µsec. The entire memory can be

erased and programmed byte-by-byte typically in 16 seconds when using status detection features

such as Toggle Bit or Data# Polling to indicate the completion of Program operation. The SuperFlash

technology provides fixed Erase and Program time, independent of the number of Erase/Program

cycles that have performed. Therefore the system software or hardware does not have to be calibrated

or correlated to the cumulative number of Erase cycles as is necessary with alternative flash memory

technologies, whose Erase and Program time increase with accumulated Erase/Program cycles.

To meet high density, surface mount requirements, the SST49LF080A device is offered in 32-lead

TSOP and 32-lead PLCC packages. See Figures 2 and 3 for pin assignments and Table 1 for pin

descriptions.