512 Kbit / 1 Mbit / 2 Mbit / 4 Mbit (x8) Multi-Purpose Flash
SST39LF512 / SST39LF010 / SST39LF020 / SST39LF040
SST39VF512 / SST39VF010 / SST39VF020 / SST39VF040
SST39LF/VF512 / 010 / 020 / 0403.0 & 2.7V 512Kb / 1Mb / 2Mb / 4Mb (x8) MPF memories
Data Sheet
FEATURES:
• Organized as 64K x8 / 128K x8 / 256K x8 / 512K x8
• Single Voltage Read and Write Operations
– 3.0-3.6V for SST39LF512/010/020/040
– 2.7-3.6V for SST39VF512/010/020/040
• Superior Reliability
– Endurance: 100,000 Cycles (typical)
– Greater than 100 years Data Retention
• Low Power Consumption:
– Active Current: 10 mA (typical)
– Standby Current: 1 µA (typical)
• Sector-Erase Capability
– Uniform 4 KByte sectors
• Fast Read Access Time:
– 45 ns for SST39LF512/010/020/040
– 55 ns for SST39LF020/040
– 70 and 90 ns for SST39VF512/010/020/040
• Latched Address and Data
• Fast Erase and Byte-Program:
– Sector-Erase Time: 18 ms (typical)
– Chip-Erase Time: 70 ms (typical)
– Byte-Program Time: 14 µs (typical)
– Chip Rewrite Time:
1 second (typical) for SST39LF/VF512
2 seconds (typical) for SST39LF/VF010
4 seconds (typical) for SST39LF/VF020
8 seconds (typical) for SST39LF/VF040
• Automatic Write Timing
– Internal V
PP
Generation
• End-of-Write Detection
– Toggle Bit
– Data# Polling
• CMOS I/O Compatibility
• JEDEC Standard
– Flash EEPROM Pinouts and command sets
• Packages Available
– 32-lead PLCC
– 32-lead TSOP (8mm x 14mm)
– 48-ball TFBGA (6mm x 8mm) for 1 Mbit
PRODUCT DESCRIPTION
The SST39LF512/010/020/040 and SST39VF512/010/
020/040 are 64K x8, 128K x8, 256K x8 and 5124K x8
CMOS Multi-Purpose Flash (MPF) manufactured with
SST’s proprietary, high performance CMOS SuperFlash
technology. The split-gate cell design and thick oxide tun-
neling injector attain better reliability and manufacturability
compared with alternate approaches. The SST39LF512/
010/020/040 devices write (Program or Erase) with a 3.0-
3.6V power supply. The SST39VF512/010/020/040
devices write with a 2.7-3.6V power supply. The devices
conform to JEDEC standard pinouts for x8 memories.
Featuring high performance Byte-Program, the
SST39LF512/010/020/040 and SST39VF512/010/020/
040 devices provide a maximum Byte-Program time of 20
µsec. These devices use Toggle Bit or Data# Polling to indi-
cate the completion of Program operation. To protect
against inadvertent write, they have on-chip hardware and
Software Data Protection schemes. Designed, manufac-
tured, and tested for a wide spectrum of applications, they
are offered with a guaranteed endurance of 10,000 cycles.
Data retention is rated at greater than 100 years.
The SST39LF512/010/020/040 and SST39VF512/010/
020/040 devices are suited for applications that require
convenient and economical updating of program, configu-
ration, or data memory. For all system applications, they
©2001 Silicon Storage Technology, Inc.
S71150-03-000 6/01
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1
significantly improves performance and reliability, while low-
ering power consumption. They inherently use less energy
during Erase and Program than alternative flash technolo-
gies. The total energy consumed is a function of the
applied voltage, current, and time of application. Since for
any given 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 oper-
ation is less than alternative flash technologies. These
devices also improve flexibility while lowering the cost for
program, data, and configuration storage applications.
The SuperFlash technology provides fixed Erase and Pro-
gram times, independent of the number of Erase/Program
cycles that have occurred. Therefore the system software
or hardware does not have to be modified or de-rated as is
necessary with alternative flash technologies, whose Erase
and Program times increase with accumulated Erase/Pro-
gram cycles.
To meet surface mount requirements, the SST39LF512/
010/020/040 and SST39VF512/010/020/040 devices are
offered in 32-lead PLCC and 32-lead TSOP packages. The
39LF/VF010 is also offered in a 48-ball TFBGA package.
See Figures 1 and 2 for pinouts.
The SST logo and SuperFlash are registered trademarks of Silicon Storage Technology, Inc.
MPF is a trademark of Silicon Storage Technology, Inc.
These specifications are subject to change without notice.
512 Kbit / 1 Mbit / 2 Mbit / 4 Mbit Multi-Purpose Flash
SST39LF512 / SST39LF010 / SST39LF020 / SST39LF040
SST39VF512 / SST39VF010 / SST39VF020 / SST39VF040
Data Sheet
Device Operation
Commands are used to initiate the memory operation func-
tions of the device. Commands are written to the device
using standard microprocessor write sequences. A com-
mand is written by asserting WE# low while keeping CE#
low. The address bus is latched on the falling edge of WE#
or CE#, whichever occurs last. The data bus is latched on
the rising edge of WE# or CE#, whichever occurs first.
pulse, while the command (30H) is latched on the rising
edge of the sixth WE# pulse. The internal Erase operation
begins after the sixth WE# pulse. The End-of-Erase can be
determined using either Data# Polling or Toggle Bit meth-
ods. See Figure 9 for timing waveforms. Any commands
written during the Sector-Erase operation will be ignored.
Chip-Erase Operation
The SST39LF512/010/020/040 and SST39VF512/010/
020/040 devices provide a Chip-Erase operation, which
allows the user to erase the entire memory array to the “1s”
state. This is useful when the entire device must be quickly
erased.
The Chip-Erase operation is initiated by executing a six-
byte Software Data Protection command sequence with
Chip-Erase command (10H) with address 5555H in the last
byte sequence. The internal Erase operation begins with
the rising edge of the sixth WE# or CE#, whichever occurs
first. During the internal Erase operation, the only valid read
is Toggle Bit or Data# Polling. See Table 4 for the command
sequence, Figure 10 for timing diagram, and Figure 18 for
the flowchart. Any commands written during the Chip-
Erase operation will be ignored.
Read
The Read operation of the SST39LF512/010/020/040 and
SST39VF512/010/020/040 device is controlled by CE#
and OE#, both have to be low for the system to obtain data
from the outputs. CE# is used for device selection. When
CE# is high, the chip is deselected and only standby power
is consumed. OE# is the output control and is used to gate
data from the output pins. The data bus is in high imped-
ance state when either CE# or OE# is high. Refer to the
Read cycle timing diagram for further details (Figure 4).
Byte-Program Operation
The SST39LF512/010/020/040 and SST39VF512/010/
020/040 are programmed on a byte-by-byte basis. Before
programming, one must ensure that the sector, in which
the byte which is being programmed exists, is fully erased.
The Program operation consists of three steps. The first
step is the three-byte-load sequence for Software Data
Protection. The second step is to load byte address and
byte data. During the Byte-Program operation, the
addresses are latched on the falling edge of either CE# or
WE#, whichever occurs last. The data is latched on the ris-
ing edge of either CE# or WE#, whichever occurs first. The
third step is the internal Program operation which is initi-
ated after the rising edge of the fourth WE# or CE#, which-
ever occurs first. The Program operation, once initiated, will
be completed, within 20 µs. See Figures 5 and 6 for WE#
and CE# controlled Program operation timing diagrams
and Figure 15 for flowcharts. During the Program opera-
tion, the only valid reads are Data# Polling and Toggle Bit.
During the internal Program operation, the host is free to
perform additional tasks. Any commands written during the
internal Program operation will be ignored.
Write Operation Status Detection
The SST39LF512/010/020/040 and SST39VF512/010/
020/040 devices provide two software means to detect the
completion of a Write (Program or Erase) cycle, in order to
optimize the system write cycle time. The software detec-
tion includes two status bits: Data# Polling (DQ
7
) and Tog-
gle Bit (DQ
6
). The End-of-Write detection mode is enabled
after the rising edge of WE# which initiates the internal Pro-
gram or Erase operation.
The actual completion of the nonvolatile write is asynchro-
nous with the system; therefore, either a Data# Polling or
Toggle Bit read may be simultaneous with the completion
of the Write cycle. If this occurs, the system may possibly
get an erroneous result, i.e., valid data may appear to con-
flict with either DQ
7
or DQ
6
. In order to prevent spurious
rejection, if an erroneous result occurs, the software routine
should include a loop to read the accessed location an
additional two (2) times. If both reads are valid, then the
device has completed the Write cycle, otherwise the rejec-
tion is valid.
Sector-Erase Operation
The Sector-Erase operation allows the system to erase the
device on a sector-by-sector basis. The sector architecture
is based on uniform sector size of 4 KByte. The Sector-
Erase operation is initiated by executing a six-byte-com-
mand sequence with Sector-Erase command (30H) and
sector address (SA) in the last bus cycle. The sector
address is latched on the falling edge of the sixth WE#
©2001 Silicon Storage Technology, Inc.
S71150-03-000 6/01
395
2
512 Kbit / 1 Mbit / 2 Mbit / 4 Mbit Multi-Purpose Flash
SST39LF512 / SST39LF010 / SST39LF020 / SST39LF040
SST39VF512 / SST39VF010 / SST39VF020 / SST39VF040
Data Sheet
Data# Polling (DQ
7
)
When the SST39LF512/010/020/040 and SST39VF512/
010/020/040 are in the internal Program operation, any
attempt to read DQ
7
will produce the complement of the
true data. Once the Program operation is completed, DQ
7
will produce true data. The device is then ready for the next
operation. During internal Erase operation, any attempt to
read DQ
7
will produce a ‘0’. Once the internal Erase opera-
tion is completed, DQ
7
will produce a ‘1’. The Data# Polling
is valid after the rising edge of fourth WE# (or CE#) pulse
for Program operation. For Sector- or Chip-Erase, the
Data# Polling is valid after the rising edge of sixth WE# (or
CE#) pulse. See Figure 7 for Data# Polling timing diagram
and Figure 16 for a flowchart.
Software Data Protection (SDP)
The SST39LF512/010/020/040 and SST39VF512/010/
020/040 provide the JEDEC approved Software Data Pro-
tection scheme for all data alteration operation, i.e., Pro-
gram and Erase. Any Program operation requires the
inclusion of a series of three byte sequence. The three
byte-load sequence is used to initiate the Program opera-
tion, providing optimal protection from inadvertent Write
operations, e.g., during the system power-up or power-
down. Any Erase operation requires the inclusion of six
byte load sequence. These devices are shipped with the
Software Data Protection permanently enabled. See Table
4 for the specific software command codes. During SDP
command sequence, invalid commands will abort the
device to read mode, within T
RC
.
Toggle Bit (DQ
6
)
During the internal Program or Erase operation, any con-
secutive attempts to read DQ
6
will produce alternating 0s
and 1s, i.e., toggling between 0 and 1. When the internal
Program or Erase operation is completed, the toggling will
stop. The device is then ready for the next operation. The
Toggle Bit is valid after the rising edge of fourth WE# (or
CE#) pulse for Program operation. For Sector- or Chip-
Erase, the Toggle Bit is valid after the rising edge of sixth
WE# (or CE#) pulse. See Figure 8 for Toggle Bit timing dia-
gram and Figure 16 for a flowchart.
Product Identification
The Product Identification mode identifies the devices as
the SST39LF/VF512, SST39LF/VF010, SST39LF/VF020
and SST39LF/VF040 and manufacturer as SST. This
mode may be accessed by software operations. Users
may use the Software Product Identification operation to
identify the part (i.e., using the device ID) when using multi-
ple manufacturers in the same socket. For details, see
Table 4 for software operation, Figure 11 for the Software
ID Entry and Read timing diagram, and Figure 17 for the
Software ID entry command sequence flowchart.
TABLE 1: P
RODUCT
I
DENTIFICATION
Address
Manufacturer’s ID
Device ID
SST39LF/VF512
SST39LF/VF010
SST39LF/VF020
SST39LF/VF040
0000H
0001H
0001H
0001H
0001H
Data
BFH
D4H
D5H
D6H
D7H
T1.1 395
Data Protection
The SST39LF512/010/020/040 and SST39VF512/010/
020/040 provide both hardware and software features to
protect nonvolatile data from inadvertent writes.
Hardware Data Protection
Noise/Glitch Protection: A WE# or CE# pulse of less than 5
ns will not initiate a Write cycle.
V
DD
Power Up/Down Detection: The Write operation is
inhibited when V
DD
is less than 1.5V.
Write Inhibit Mode: Forcing OE# low, CE# high, or WE#
high will inhibit the Write operation. This prevents inadvert-
ent writes during power-up or power-down.
Product Identification Mode Exit/Reset
In order to return to the standard Read mode, the Software
Product Identification mode must be exited. Exit is accom-
plished by issuing the Software ID Exit command
sequence, which returns the device to the Read operation.
Please note that the Software ID Exit command is ignored
during an internal Program or Erase operation. See Table 4
for software command codes, Figure 12 for timing wave-
form, and Figure 17 for a flowchart.
©2001 Silicon Storage Technology, Inc.
S71150-03-000 6/01
395
3
512 Kbit / 1 Mbit / 2 Mbit / 4 Mbit Multi-Purpose Flash
SST39LF512 / SST39LF010 / SST39LF020 / SST39LF040
SST39VF512 / SST39VF010 / SST39VF020 / SST39VF040
Data Sheet
F
UNCTIONAL
B
LOCK
D
IAGRAM
X-Decoder
SuperFlash
Memory
Memory Address
Address Buffers & Latches
Y-Decoder
CE#
OE#
WE#
DQ7 - DQ0
395 ILL B1.1
Control Logic
I/O Buffers and Data Latches
SST39LF/VF512 SST39LF/VF010 SST39LF/VF020 SST39LF/VF040
WE#
WE#
WE#
WE#
VDD
A12
A15
A16
A18
VDD
A12
A15
A16
VDD
A12
A15
A16
NC
VDD
A12
A15
NC
NC
SST39LF/VF040 SST39LF/VF020 SST39LF/VF010 SST39LF/VF512
NC
SST39LF/VF512 SST39LF/VF010 SST39LF/VF020 SST39LF/VF040
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
5
6
7
8
9
10
11
12
13
SST39LF/VF040 SST39LF/VF020 SST39LF/VF010 SST39LF/VF512
4
3
2
1
32 31 30
29
28
27
26
25
24
23
22
NC
A17
NC
A17
A14
A13
A8
A9
A11
OE#
A10
CE#
DQ7
A14
A13
A8
A9
A11
OE#
A10
CE#
DQ7
A14
A13
A8
A9
A11
OE#
A10
CE#
DQ7
A14
A13
A8
A9
A11
OE#
A10
CE#
DQ7
32-lead PLCC
Top View
21
14 15 16 17 18 19 20
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
VSS
395 ILL F02b.3
DQ1
DQ2
VSS
DQ3
DQ4
DQ5
DQ5
DQ5
DQ1
DQ2
DQ3
DQ4
DQ1
DQ2
VSS
DQ3
DQ4
FIGURE 1: P
IN
A
SSIGNMENTS FOR
32-
LEAD
PLCC
©2001 Silicon Storage Technology, Inc.
S71150-03-000 6/01
395
4
DQ6
DQ6
VSS
DQ6
512 Kbit / 1 Mbit / 2 Mbit / 4 Mbit Multi-Purpose Flash
SST39LF512 / SST39LF010 / SST39LF020 / SST39LF040
SST39VF512 / SST39VF010 / SST39VF020 / SST39VF040
Data Sheet
SST39LF/VF040 SST39LF/VF020 SST39LF/VF010 SST39LF/VF512
A11
A9
A8
A13
A14
A17
WE#
VDD
A18
A16
A15
A12
A7
A6
A5
A4
A11
A9
A8
A13
A14
A17
WE#
VDD
NC
A16
A15
A12
A7
A6
A5
A4
A11
A9
A8
A13
A14
NC
WE#
VDD
NC
A16
A15
A12
A7
A6
A5
A4
A11
A9
A8
A13
A14
NC
WE#
VDD
NC
NC
A15
A12
A7
A6
A5
A4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
SST39LF/VF512 SST39LF/VF010 SST39LF/VF020 SST39LF/VF040
OE#
A10
CE#
DQ7
DQ6
DQ5
DQ4
DQ3
VSS
DQ2
DQ1
DQ0
A0
A1
A2
A3
OE#
A10
CE#
DQ7
DQ6
DQ5
DQ4
DQ3
VSS
DQ2
DQ1
DQ0
A0
A1
A2
A3
OE#
A10
CE#
DQ7
DQ6
DQ5
DQ4
DQ3
VSS
DQ2
DQ1
DQ0
A0
A1
A2
A3
OE#
A10
CE#
DQ7
DQ6
DQ5
DQ4
DQ3
VSS
DQ2
DQ1
DQ0
A0
A1
A2
A3
Standard Pinout
Top View
Die Up
395 ILL F01.0
FIGURE 2: P
IN
A
SSIGNMENTS FOR
32-
LEAD
TSOP (8
MM
X
14
MM
)
TOP VIEW (balls facing down)
SST39LF/VF010
6
5
A9 A8 A11 A12 NC A10 DQ6 DQ7
4
3
2
1
395 ILL F01a.0.eps
WE# NC NC NC DQ5 NC VDD DQ4
NC NC NC NC DQ2 DQ3 VDD NC
A7 NC A6
A3 A4 A2
A5 DQ0 NC
A1
NC DQ1
A14 A13 A15 A16 NC NC
NC VSS
A0 CE# OE# VSS
A
B
C
D
E
F
G
H
FIGURE 3: P
IN
A
SSIGNMENT FOR
48-
BALL
TFBGA (6
MM
X
8
MM
)
FOR
1 M
BIT
©2001 Silicon Storage Technology, Inc.
S71150-03-000 6/01
395
5
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