– Endurance: At least 1000 Cycles
– Greater than 100 years Data Retention
•Low Power Consumption:
– Ac ti ve Current: 10 mA (typical)
– Standby Current: 2 µA (typical)
•Fast Read Access Time:
– 70 ns
– 90 ns
•Latched Address and Data
PRODUCT DESCRIPTION
The SST37VF512/010/020/040 devices are 64K x8 / 128K
x8 / 256K x8 / 512K x8 CMOS, Many-Time Programmable
(MTP), low cost flash, 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 SST37VF512/010/020/040 can
be electrically erased and programmed at least 1000 times
using an external programmer, e.g., to change the contents
of devices in inventory. The SST37VF512/010/020/040
have to be erased prior to programming. These devices
conform to JEDEC standard pinouts for byte-wide flash
memories.
•Fast Byte-Program Operation:
– Byte-Program Time: 10 µs (typical)
– Chip Program Time:
0.6 seconds (typical) for SST37VF512
1.2 seconds (typical) for SST37VF010
2.4 seconds (typical) for SST37VF020
4.8 seconds (typical) for SST37VF040
•Electrical Erase Using Programmer
– Does not require UV source
– Chip-Erase Time: 100 ms (typical)
To meet surface mount and conventional through hole
requirements, the SST37VF512/010/020/040 are offered in
32-pin PLCC, TSOP, and P DIP pa ckages. See F igures 1,
2, and 3 for pinouts.
Device Operation
The SST37VF512/010/020/040 devices are nonvolatile
memory solutions that can be used instead of standard
flash devices if in-system programmability is not required. It
is functionally (Read) and pin compatible with industry
standard flash products.The device supports electrical
Erase operation via an external programmer.
Featuring high performance Byte-Program, the
SST37VF512/010/020/040 provide a typical Byte-Program time of 10 µs. Designed, manufactur ed, and tested
for a wide spectrum of applications, these devices are
offered with an endurance of at least 1000 cycles. Data
retention i s rat ed at g reat er than 100 y ears .
The SST37VF512 /010/020/ 040 are sui ted for applica tions
that require infrequent writes and low power nonvolatile
storage. These devices will improve flexibility, efficiency,
and performance while matching the low cost in nonvolatile
applications that currently use UV-EPROMs, OTPs, and
mask ROMs.
The Read operation of the SST37VF512/010/020/040 is
controlled by CE# and OE#. Both CE# and OE# have to be
low for the system to obtain data from the output s. Once
the address is s table, the addres s access time is equal t o
the delay from CE# to output (T
output after a delay of TOE from the falling edge of OE#,
assuming the CE# pin has been low and the addresses
have been stable for at least T
is high, the chip is deselected and a standby current of only
10 µA (typical) 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 V
Refer to Fig ure 4 f or the ti ming di agr am.
The SST logo and SuperFlash are registered trademarks of Silicon Storage Technology, Inc.
MTP is a trademark of Silicon Storage Technology, Inc.
These specifications are subject to change without notice.
The SST37VF512/ 010/0 20/040 are programmed by usin g
an external programmer. The programming m ode is activated by asserting 12V (±5%) on OE# pin and V
on CE#
IL
pin. The device is program me d u sing a single puls e ( W E #
pin low) of 10 µs per byte. Using the MTP programming
algorithm, the Byte-Program process continues byte-bybyte until the entire chip ha s been programmed. Refer to
Figure 10 for the flowchart and Figur e 6 for the timi ng di agram.
Chip-Erase Operation
The only way to change a data from a “0” to “1” is by electri-
cal erase that changes every bit in the device to “1”. The
SST37VF512/010/020/040 use an electrical Chip-Erase
operation. The entire chip can be erased in 100 ms (WE#
pin low). In order to activate erase mode, the 12V (±5%) is
applied to OE# and A
address and data pins are “don’t care”. The falling edge of
WE# will start the Chip-Erase operation. Once the chip has
been erased, all bytes must be verified for FFH. R efer to Figure 9 for the f lowchart and Figure 5 for the timing diagr am.
pins while CE# is low. All other
9
Product Identification Mode
The Product Id entification mode ide ntifies the devices as
SST37VF512, SST37VF010, SST37VF020, and
SST37VF040 and manufacturer a s SST. This mode may
be accessed by the hardware method. To activate this
mode, the programming equipment must force V
(12V±5%) on address A9. Two identifier bytes may then be
sequenced from the device outputs by toggling address
. For details, see T able 3 for hardware operation.
line A
0
TABLE1: P
Manufacturer’s ID0000HBFH
Device ID
SST37VF5120001HC4H
SST37VF0100001HC5H
SST37VF0200001HC6H
SST37VF0400001HC2H
RODUCT IDENTIFICATION
AddressData
T1.2 397
Design Considerations
The SST37VF512/010/020/040 should have a 0.1µF
ceramic high frequency, low inductance capacitor connected between V
placed as close to the package terminals as possible.
and GND. This capacitor shou ld be
DD
H
FUNCTIONAL BLOCK DIAGRAM
Memory Address
CE#
OE#
A
9
WE#
Address Buffer
Control Logic
X-Decoder
OE# and A
must remain stable at VH for the entire dura-
9
tion of an Erase operati on. OE# mus t remain stable at V
for the entire duration of the Program operation.
CE#Chip EnableTo activate the device when CE# is low.
WE#Write EnableTo program or erase (WE# = V
OE#Output EnableTo gate the data output buffers during Read operation when low
V
DD
V
SS
NCNo ConnectionUnconnected pins.
1. AMS = Most significant address
A
MS
Address InputsTo provide memory addresses.
0
Data Input/outputTo output data during Read cycles and receive input data during Program cycles.
0
The outputs are in tri-state when OE# or CE# is high.
pulse during Program or Erase)
IL
Power SupplyTo provide 3.0V supply (2.7-3.6V)
Ground
= A15 for SST37VF512, A16 for SST37VF010, A17 for SST37VF020, and A18 for SST37VF040
1. Device ID = C4H for SST37VF512, C5H for SST37VF020, C6H for SST37VF020, and C2H for SST37VF040
2. A
= Most significant address
MS
= A15 for SST37VF512, A16 for SST37VF010, A17 for SST37VF020, and A18 for SST37VF040
A
MS
Note: X = VIL or VIH (or VH in case of OE# and A9)
= 12V±5%
V
H
V
IL
V
IH
H
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.)