SST49LF040 Datasheet, PDF (1/48 Pages) Silicon Storage Technology, Inc – 4 Mbit LPC Flash

4 Mbit LPC Flash
SST49LF040
FEATURES:
SST49LF0404 Mb LPC Flash
Advance Information
• LPC Interface Flash
– SST49LF040: 512K x8 (4 Mbit)
• Conforms to Intel LPC Interface Specification 1.0
• Flexible Erase Capability
– Uniform 4 KByte sectors
– Uniform 64 KByte overlay blocks
– 64 KByte Top boot block protection
– Chip-Erase for PP Mode Only
• 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: 6 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: 8 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
– ID pins for multi-chip selection
– Decode both top and bottom regions of the
system memory map
• Parallel Programming (PP) Mode
– 11-pin multiplexed address and 8-pin data
I/O interface
– Supports fast programming In-System on pro-
grammer equipment
• CMOS and PCI I/O Compatibility
• Packages Available
– 32-lead PLCC
– 32-lead TSOP (8mm x 14mm)
PRODUCT DESCRIPTION
The SST49LF040 flash memory devices are 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 sup-
ported by the SST49LF040: LPC mode for In-System
operation and Parallel Programming (PP) mode to interface
with programmer equipment.
The SST49LF040 flash memory devices are manufactured
with SST’s proprietary, high performance SuperFlash Tech-
nology. The split-gate cell design and thick oxide tunneling
injector attain better reliability and manufacturability com-
pared with alternate approaches. The SST49LF040 device
significantly improves performance and reliability, while low-
ering power consumption. The SST49LF040 device writes
(Program or Erase) with a single 3.0-3.6V power supply. It
uses less energy during Erase and Program than alterna-
tive flash memory technologies. The total energy con-
sumed is a function of the applied voltage, current and time
of application. Since for any give voltage range, the Super-
Flash 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 technologies. The SST49LF040 product provides
a maximum Byte-Program time of 20 µsec. The entire
memory can be erased and programmed byte-by-byte typ-
ically in 8 seconds when using status detection features
such as Toggle Bit or Data# Polling to indicate the comple-
tion of Program operation. The SuperFlash technology pro-
vides 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
SST49LF040 device is offered in 32-lead TSOP and 32-
lead PLCC packages. See Figures 2 and 3 for pin assign-
ments and Table 1 for pin descriptions.
©2001 Silicon Storage Technology, Inc.
S71213-00-000 11/01
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The SST logo and SuperFlash are registered trademarks of Silicon Storage Technology, Inc.
Intel is a registered trademark of Intel Corporation.
These specifications are subject to change without notice.