– Endurance: 100,000 Cycles (Typical)
– Greater than 100 years Data Retention
• Low Power Consumption (typical values at 5 MHz)
– Active Current: 9 mA (typical)
– Standby Current: 3 µA (typical)
– Auto Low P ower Mode: 3 µA (typical)
• Hardware Block-Protection/WP# Input Pin
– Top Block-Protection (top 64 KByte)
for SST39VF1682
– Bottom Block-Protection (bottom 64 KByte)
for SST39VF1681
• Sector-Erase Capability
– Uniform 4 KByte sectors
• Block-Erase Capability
– Uniform 64 KByte blocks
• Chip-Erase Capability
• Erase-Suspend/Erase-Resume Capabilities
• Hardware Reset Pin (RST#)
• Security-ID Feature
– SST: 128 bits; User: 128 bits
• Fast Read Access Time:
– 70 ns
– 90 ns
• Latched Address and Data
• Fast Erase and Byte-Program:
– Sector-Erase Time: 18 ms (typical)
– Block-Erase Time: 18 ms (typical)
– Chip-Erase Time: 40 ms (typical)
– Byte-Program Time: 7 µs (typical)
• Automatic Write Timing
– Internal V
Generation
PP
• End-of-Write Detection
– Toggle Bits
– Data# Polling
• CMOS I/O Compatibility
• JEDEC Standard
– Flash EEPROM Pinouts and Command sets
• Packages Available
– 48-ball TFBGA (6mm x 8mm)
– 48-lead TSOP (12mm x 20mm)
PRODUCT DESCRIPTION
The SST39VF168x devices are 2M x8 C MOS Multi-Purpose Flash Plus (MPF+) manufactured with SST’s proprietary, high performance CMOS SuperFlash technology.
The split-gate cell design and thick-oxide tunneling injector attain better reliability and manufacturability compared
with alternate approaches. The SST39VF168x write (Program or Erase) with a 2.7-3.6V power supply. These
devices conform to JEDEC standard pinouts for x8 memories.
Featuring high performance Byte-Program, the
SST39VF168x devices provide a typical Byte-Program
time of 7 µsec. These devices use T oggle Bit or Data# Polling to indicate the completion of Program operation. To protect against inadvertent write, they have on-chip hardware
and Software Data Protec tion schem es. Designed, manufactured, and tested for a wide spectrum of applications,
these devices are offered with a g ua rant eed ty pic al en dur ance of 100,00 0 cycles. Data retention is ra ted at greater
than 100 y ears .
The SST39VF168x devices are suited for applications that
require convenient and economi cal updating of program,
configuration, or da ta memory. For all system a ppl i ca tio ns,
they significantly i mp r ove performa nc e an d re li ab il it y, while
lowering power consumption. They inherently use less
energy during Erase and Program than alternative flash
technologies. The tota l energy consumed is a function of
the applied voltage, curre nt, and time of ap plic ation . Sinc e
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
operation is less than alternative flash technologies. These
devices also impr ove flexibility while lowering the c ost for
program, data, and configuration storage applications.
The SuperFlash technology prov ides fixed Erase and Program times, independent of the n umbe r of Er ase/Prog r am
cycles that have occurred. Therefore the system software
or hardware does not hav e to be modified or de-rated as is
necessary with alternative flash technologies, whose
Erase and Program times increase with accumulated
Erase/Program cycles.
To meet high density, surface mount requirements, the
SST39VF168x are offered in both 48-ball TFBGA and
48-lead TSOP packages. See Figures 1 and 2 for pin
assignments.
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.
Page 2
Preliminary Specifications
16 Mbit Multi-Purpose Flash Plus
SST39VF1681 / SST39VF1682
Device Operation
Commands are used to initiate the memory operation functions of the device. Commands are written to the device
using standard microprocess or write sequences. A command is written by asse r ting WE# low whil e keeping CE#
low. The address bus is latched on the falling edge of WE#
or CE#, whichever occurs last. T he data bus is latc hed o n
the rising edge of WE# or CE#, whichever occurs first.
The SST39VF168x also have the Auto Low Power mode
which puts the device in a near standby mode after data
has been accessed with a valid Read operation. This
reduces the I
typically 3 µA. The Auto Low Pow er mode reduces the typical I
active read current to the range of 2 mA/MHz of
DD
Read cycle time. The device exits the Auto Low Power
mode with any address transition or control signal transition
used to initiate ano ther Read cycle, with no access t ime
penalty. Note that the device does not enter Auto-Low
Power mode after power-up with CE# held steadily low,
until the first address transition or CE# is driven high.
active read current from typically 9 mA to
DD
Read
The Read operation of the SST39VF168x 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 impedance state when either CE# or
OE# is high. Refer to the Read cycle timing diagram for
further details (Figure 3).
Byte-Program Operation
The SST39VF168x are programmed on a byte-by-byte
basis. Before programming, the sector where the byte
exists must be fully erased. The Program operation is
accomplished in three steps. The first step is the three-byte
load sequence for Software Data Protection. The s econd
step is to load byte address and byte data. During the ByteProgram opera tion, th e addr esses ar e latche d on the fa lling
edge of either CE# or WE#, whichever occurs last. The
data is latched on th e rising edge of ei ther CE# or WE#,
whichever occurs first. The third step is the in ternal Program operation which is initiated after the rising edge of the
fourth WE# or CE#, whichever occurs first. The Program
operation, once initiated, will be completed within 10 µs.
See Figure s 4 a nd 5 for WE # and CE # co nt ro ll ed P r og ram
operation timing diagrams and Figure 19 for flowcharts.
During the Program operation, the only valid reads are
Data# Polling and Toggle Bit. During the in tern al Program
operation, the host is fre e to perform ad ditiona l tasks. Any
commands issu ed during the inter nal Program operation
are ignored. Dur ing the c omman d seq uence, WP # sho uld
be statically held high or lo w .
Sector/Block-Erase Operation
The Sector- (or Block-) Erase operation allows the system
to erase the device on a sector-by-sector (or block-byblock) basis. The SST39V F168x offer both Sector-Erase
and Block-Erase mode. The sec tor architecture is based
on uniform sector size of 4 KByte. The Block-Erase mode
is based on unifor m block size of 64 KByte. The SectorErase operation is initiated by executing a six-byte command sequence with Sector-Erase command (50H) and
sector address (SA) in the last bus cycle. The Block-Erase
operation is initiated by executing a six-byte command
sequence with Block-Erase command (30H) and block
address (BA) in the last bus cycle. The sector or block
address is latched on the falling edge of the sixth WE#
pulse, while the comm and (30H or 50H) is latched on th e
rising edge of the sixth WE# pulse. The internal Erase
operation begins a fter the sixth WE# pulse. The End -ofErase operation can be determined using either Data#
Polling or Toggle Bit methods. See Figures 9 and 10 for timing waveforms and Figure 23 for the flowchart. Any commands issued during the Sec tor- or B lock-Era se op erat io n
are ignored. When WP# is low, any attempt to Sector(Block-) Erase the prote cted block will be ignor ed. During
the command sequence, WP# should be statically held
high or low.
Erase-Suspend/Erase-Resume Commands
The Erase-Suspend operation temporarily suspends a
Sector- or Block-Erase operation thus allowing data to be
read from any memor y loca tion, or program data into any
sector/block that is not sus pended for an Erase operation .
The operation is executed by issuing one byte command
sequence with Erase-Suspend command (B0H). The
device automatically enters read mode typically within 20
µs after the Era se-Suspend command had been issued.
Valid data can be read from any sector or block that is not
suspended from an Erase operation. Reading at addr ess
location withi n erase-suspende d sectors/blocks will output
DQ
toggling and DQ6 at “1”. While in Erase-Suspend
2
mode, a Byte-Program operation is allowed except for the
sector or block selected for Erase-Suspend.
T o resume Sector-Erase or Block-Erase operation which has
been suspended the system must issue Erase Resume
command. The operation is executed by issuing one byte
command sequence with Erase Resume command (30H)
at any address in th e last Byte sequence .
16 Mbit Multi-Purpose Flash Plus
SST39VF1681 / SST39VF1682
Preliminary Specifications
Chip-Erase Operation
The SST39VF168x provide a Chip-Erase o peration, w hich
allows the user to erase the entire memory arra y to the “1”
state. This is useful when the entire de vice must be quickly
erased.
The Chip-Erase operation is initiated by executing a sixbyte command sequence with Chip-Erase command
(10H) at address AAAH in the last byte sequence. The
Erase operation begins with the rising edge of the sixth
WE# or CE#, whichever occurs first. During the Erase
operation, the only v alid read is Toggle Bit or Data# P olling.
See Table 6 for the command sequence, Figure 9 for timing diagram, and Figure 23 for the flowchart. Any commands issued during the Chip-Erase operation are
ignored. When WP# is low, any attempt to Chip-Erase will
be ignored. During the command sequence, WP# should
be statically held high or lo w.
Write Operation Status Detection
The SST39VF16 8x provide two softwar e means to det ect
the completion of a Write (Program or Erase) cycle, in
order to optimize the syst em write cycl e time . The s oftw are
detection includes two status bits: Data# Polling (DQ
Toggle Bit (DQ
). The End-of-Write detection mode is
6
) and
7
enabled after the rising edge of WE#, which initiate s the
internal Program or Erase operation.
The actual completion of the nonvolatile write is asynchronous 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 conflict w it h ei th er D Q
or DQ6. In order to pre-
7
vent 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 reje ction is valid.
Data# Polling (DQ7)
When the SST39VF168x are in the internal Program ope ration, any attempt to read DQ
ment of the true data. Once the Program operation is
completed, DQ
though DQ
will produce true data. Note that even
7
may have valid data immediately following the
7
completion of an internal Write operation, the remaining
data outputs may still be invalid: valid data on the entire
data bus will appear in subsequent successive Read
cycles after a n in te rva l of 1 µ s . Du ring internal Erase operation, any attempt t o rea d DQ
internal Erase operation is completed, DQ
will produce the comple-
7
will produce a ‘0’. Once the
7
will produce a
7
‘1’. The Data# P olling is v alid after the rising edge o f f ourth
WE# (or CE#) pulse for Program operation. For Sector-,
Block- or Chip-Erase, the Data# Polling is valid after the
rising edge of sixth WE# (or CE#) pulse. See Figure 6 for
Data# P olling timing diagram an d Figure 20 f or a flowchart.
Toggle Bits (DQ6 and DQ2)
During the inter nal Program or Erase ope ration, any consecutive attempts to read DQ
and “0”s, i.e., toggling between 1 and 0. Wh en the i nte rnal
Program or Erase operat ion is complete d, the DQ
stop toggling. The device is then ready for the next operation. For Sector-, Block-, or Chip-Erase, the toggle bit (DQ
is valid after the ris ing edge of six th WE# (or CE#) p ulse.
DQ
will be set to “1” if a Read operation is attempted on an
6
Erase-Suspended Sector/Block. If Program operation is initiated in a sector/block not selected in Erase-Suspend
mode, DQ
will toggle .
6
An additional Toggle Bit is available on DQ
used in conjunction with DQ
sector is being actively erased or erase-suspended. T able 1
shows detailed status bits information. The Toggle Bit
(DQ
) is valid after the rising edge of the last WE# (or CE#)
2
pulse of Write operation. See Figure 7 for Toggle Bit timing
diagram and Figure 20 for a flowchart.
TABLE 1: WRITE OPERATION STATUS
StatusDQ7DQ
Normal
Operation
EraseSuspend
Mode
Note: DQ7 and DQ2 require a valid address when reading
The SST39VF168x provide both hardware and software
feature s to pr otect n onv ol atile data f rom inad vertent writ es.
Hardware Data Protection
Noise/Glitch Protection: A WE# or CE# pulse of le ss than 5
ns will not init iate a write cycle .
V
Power Up/Down Detection: The Write operation is
DD
inhibited when V
Write Inhibit Mode:
is less than 1.5V.
DD
Forcing OE# low, CE# high, or WE#
high will inhibit the W r ite operation. This prevents inadvertent writes during p ow er-up o r po wer- down.
Hardware Block Protection
The SST39VF168 2 supports top har dware block protection, which protects the top 64 KByte block of the device.
The SST39VF1681 su pports bottom hardware block protection, which pr otects the bottom 64 KByte block of the
device. The Boot Block addre ss ranges are describ ed in
Table 2. Program and Erase operation s are prevented on
the 64 KByte when WP# is low. If WP# is left floating, it is
internally held high via a pull-up resistor, and the Boot
Block is unprotected, enabling Program and Erase operations on that block.
TABLE 2: B
ProductAddress Range
Bottom Boot Block
SST39VF1681000000H-00FFFFH
Top Boot Block
SST39VF16821F0000H-1FFFFFH
OOT BLOCK ADDRESS RANGES
T2.1 1243
Hardware Reset (RST#)
The RST# pin provides a hardware method of resetting the
device to read array data. When the RST# pin is held low
for at least T
any in-progress operation will terminate and
RP,
return to Read mode. When no internal Program/Erase
operation is in progress, a minimum period of T
RHR
is
required after RST# is driven high before a valid Read can
take place (see Figure 15).
The Erase or Program operation that has been interrupted
needs to be reinitiated after the device resumes normal
operation mode to ensure data integrity .
Software Data Protection (SDP)
The SST39VF 168x pr ovide t he JEDEC appro ved S oftw are
Data Protection schem e for all data alteration operations,
i.e., Program and Erase. Any Program operation requi res
the inclusion of the th ree-byte sequence. The three-byte
load sequence is used to initiate the Program operation,
providing optimal pr otection from inad vertent W rite operations, e.g., during the system power-up or power-down.
Any Erase operation requires the inclusion of six-byte
sequence. These devices a re shipped with the Software
Data Protection permanently enabled. See Table 6 for the
specific software command codes. During SDP command
sequence, invalid commands will abort the device to Read
mode within T
RC.
Common Flash Memory Interface (CFI)
The SST39VF168x also contain the CFI information to
describe the characteristics of the device. In order to enter
the CFI Query mode, the system must write three-byte
sequence, same as product ID entry command with 98H
(CFI Query command) to address AAAH in the last byte
sequence. Once the device enters the CFI Query mode, the
system can read CFI data at the addresses given in Tab les
7 through 9. The system must write the CFI Exit command
to return to Read mode from the CFI Query mode.
16 Mbit Multi-Purpose Flash Plus
SST39VF1681 / SST39VF1682
Preliminary Specifications
Product Identification
The Product Identificatio n mode id entifies th e devices as
the SST39VF1681 and SST39VF1682, and manufacturer
as SST. Users may use the s oftware Product Identification operation to identify the part (i.e., using the device ID)
when using multiple manufacturers in the same s ocket.
For details, see Table 6 for software operation, Figure 11
for the software ID Entry and Read timing diagram, and
Figure 21 for the software ID Entry c ommand sequence
flowchart.
TABLE 3: P
Manufacture r’s ID0000HBFH
Device ID
SST39VF16810001HC8H
SST39VF16820001HC9H
RODUCT IDENTIFICATION
AddressData
T3.1 1243
Product Identification Mode Exit/
CFI Mode Exit
In order to return to the standard Read mode, the Software
Product Identific ation mode must be exited. Exit is acco mplished by issuing the software ID Exit command
sequence, which returns the device to the Read mode.
This command may also be used to reset the device to the
Read mode after any inadvertent transient condition that
apparently caus es the device to behave abnor mally, e.g.,
not read correctly. Please note that the software ID Exit/CFI
Exit command is ignored during an internal Program or
Erase operation. See Table 6 for software command
codes, Figure 13 for timing waveform, and Figures 21 and
22 for flowcharts.
Security ID
The SST39VF168x devices offer a 256-bit Security ID
space which is divided into two 128-bit segments. The first
segment is programmed and locked at SST with a random
128-bit number. The user segment is left un-programme d
for the customer to prog ram a s desir ed.
To program the user segm ent of the Security ID, the user
must use the Security ID Byte-Program command. To
detect end-of-write for the SEC ID, read the toggle bits. Do
not use Data# Polling. Once this is complet e, the Sec ID
should be locked using the User Sec ID Program Lock-Out.
This disables any future corr up ti on of this sp ac e. Note tha t
regardless of whether or not the Sec ID is locked, neither
Sec ID segment can be erased.
The Security ID space can be queried by executing a
three-byte command sequence with Enter-Sec-ID command (88H) at addr ess AAAH in the last byte s equence.
Execute the Exit-Sec-ID command to exit this mode. Refer
to Table 6 for more details.
16 Mbit Multi-Purpose Flash Plus
SST39VF1681 / SST39VF1682
Preliminary Specifications
TABLE 4: PIN DESCRIPTION
SymbolPin NameFunctions
1
-A
A
MS
-DQ
DQ
7
WP#Write ProtectTo protect the top/bottom boot block from Erase/Program operation when grounded.
RST#ResetTo reset and return the device to Read mod e .
CE#Chip EnableTo activate the device when CE# is low.
OE#Output EnableTo gate the data output buffers.
WE#Write EnableTo control the Write operations.
V
DD
V
SS
NCNo ConnectionUnconnected pins.
1. AMS = Most significant address
A
MS
Address InputsTo provide memory addresses.
0
During Sector-Erase A
During Block-Erase A
Data Input/outputT o outpu t d ata during Read cycles and rece ive input data during Write cycles.
0
MS-A16
address lines will select the sector.
MS-A12
address lines will select the block.
Data is internally latched during a Write cycle.
The outputs are in tri-state when OE# or CE# is high.
Power SupplyTo provide power supply voltage: 2.7-3.6V
Ground
16 Mbit Multi-Purpose Flash Plus
SST39VF1681 / SST39VF1682
TABLE 7: CFI QUERY IDENTIFICATION STRING
AddressDataData
10H51HQuery Unique ASCII string “QRY”
11H52H
12H59H
13H01HPrimary OEM command set
14H07H
15H00HAddress for Primary Extended Table
16H00H
17H00HAlternate OEM command set (00H = none exists)
18H00H
19H00HAddress for Alternate OEM extended Table (00H = none exits)
1AH0 0H
1. Refer to CFI publication 100 for more details.
TABLE 8: SYSTEM INTERFACE INFORMATION
AddressDataData
1BH2 7HV
1CH36HVDD Max (Program/Erase)
1DH00HVPP min. (00H = no VPP pin)
1EH0 0HVPP max. (00H = no VPP pin)
1FH03HTypical time out for Byte-Program 2
20H00HTypical time out for min. size buffer program 2N µs (00H = not supported)
21H04HTypical time out for individual Sector/Block-Er as e 2N ms (24 = 16 ms)
22H05HTypical time out for Chip-Erase 2
23H01HMaximum time out for Byte-Program 2N times typical (21 x 23 = 16 µs)
24H00HMaximum time out for buffer program 2N times typical
25H01HMaximum time out for individual Sector/Block-Erase 2
26H01HMaximum time out for Chip-Erase 2N times typical (21 x 25 = 64 ms)
Min (Program/Erase)
DD
DQ7-DQ4: Volts, DQ3-DQ0: 100 millivolts
DQ
-DQ4: Volts, DQ3-DQ0: 100 millivolts
7
1
N
ms (25 = 32 ms)
N
µs (23 = 8 µs)
N
times typica l (21 x 24 = 32 ms)
Preliminary Specifications
T7.1 1243
T8.1 1243
TABLE 9: DEVICE GEOMETRY INFORMATION
AddressDataData
27H15HDevice size = 2
28H00HFlash Device Interface description; 00H = x8-only asynchronous interface
29H00H
2AH00HMaximum number of byte in multi-byte write = 2
2BH0 0H
2CH02HNumber of Erase Sector/Block sizes supported by device
2DHFFHSector Infor mation (y + 1 = Number of sectors; z x 256B = sector size)
2EH01Hy = 511 + 1 = 512 sectors (01FF = 511
2FH10H
30H00Hz = 16 x 256 Bytes = 4 KByte/sector (0010H = 16)
31H1FHBlock In formation (y + 1 = Number of blocks; z x 256B = block size)
32H00Hy = 31 + 1 = 32 blocks (1F = 31)
33H00H
34H01Hz = 256 x 256 Bytes = 64 KByte/block (0100H = 256)
Preliminary Specifications
Absolute Maximum Stress Ratings (Applied conditions greater than those listed under “Absolute Maximum
Stress Ratings” may cause pe r manent dama ge to the device. This is a stres s rating only and funct ional operatio n
of the device at these conditions or conditions greater tha n those defined in the ope rational sections of this data
sheet is not implied. Exposure to absolute maximum stress rating conditions may affect device reliability.)
OE# High to High-Z Output2030ns
Output Hold from Address Change00ns
RST# Pulse Width500500ns
1
RST# High before Read5050ns
RST# Pin Low to Read Mode2020µs
This parameter does not apply to Chip-Erase operations.
UnitsMinMaxMinMax
T14.1 1243
TABLE 15: PROGRAM/ERASE CYCLE TIMING PARAMETERS
SymbolParameterMinMaxUnits
T
BP
T
AS
T
AH
T
CS
T
CH
T
OES
T
OEH
T
CP
T
WP
T
WPH
T
CPH
T
DS
T
DH
T
IDA
T
SE
T
BE
T
SCE
1. This parameter is measured only for initial qualification and after a design or process change that could affect this parameter.
Byte-Program Time10 µs
Address Setup Time0ns
Address Hol d Time30ns
WE# and CE# Setup Time0ns
WE# and CE# Hold Time0ns
OE# High Setup Time0ns
OE# High Hold Time10ns
CE# Pulse Width40ns
WE# Pulse Width40ns
1
WE# Pulse Width High30ns
1
CE# Pulse Width High30ns
Data Setup Time30ns
1
Data Hold Time0ns
1
Software ID Access and Exit Time150ns
Sector-Erase25ms
Block-Erase25ms
Chip-Erase50ms