SST39VF400A-70-4I-MAQE-T Microchip Technology, SST39VF400A-70-4I-MAQE-T Datasheet - Page 5

• Manufacturer Part Number: SST39VF400A-70-4I-MAQE-T
• Description: 2.7V To 3.6V 4Mbit Multi-Purpose Flash 48 WFBGA 4x6x0.8 Mm T/R
• Manufacturer: Microchip Technology
• Series: -r

Specifications of SST39VF400A-70-4I-MAQE-T

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 4M (256K x 16)
• Speed: 70ns
• Interface: Parallel
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-WFBGA
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Designing In SST’s
Multi-Purpose Flash (39 Series) Byte-wide Products
therefore substitute it without any board layout modifica-
tions. A system design which currently uses ST Micro’s
8mm x 20mm package can use SST’s 8mm x 14mm pack-
age if a longer trace is used.
Note that the same comparisons as above apply to the
M29W512 and the SST39VF512.
• 1M Pinout Comparison
The SST39SF010A is fully pin compatible with the
M29F010 in PLCC and PDIP packages. For TSOP pack-
ages, ST Micro has an 8mm x 20mm package, as opposed
to SST’s 8mm x 14mm package. Please refer to the appli-
cation note, Recommended Land Pattern for SST TSOP
Devices, which describes how to use both packages in the
same design.
Note that the same comparisons as above apply to the
M29W010 and the SST39VF010.
• 2M Pinout Comparison
ST Micro offers one 2M product - the M29F002. The
M29F002 has a RESET# pin. Both ST Micro and SST offer
products in 32-pin PDIP , PLCC, and TSOP (8mm x 20mm)
packages. The SST39SF020A is fully pin compatible with
the PLCC and PDIP packages. The purpose of RESET#
on the M29F002 is to terminate any operation in progress
because of long erase times and resetting the internal state
machine to reading array data. This pin is a no-connect on
the SST39SF020A. (Since SST39SF020A erase of 100
ms is 150 times faster than that of the M29F002, a reset pin
is typically not needed for SST devices.) The absence of
this signal on the SST device does not affect the normal
operation of the SST device. As a result, the
SST39SF020A can be used in an M29F002 design without
any modifications in board layout for PLCC and PDIP
designs.
For the M29F002 TSOP packages, ST Micro has an 8mm
x 20mm package as opposed to SST’s 8mm x 14mm
package. Please refer to the application note, Recom-
mended Land Pattern for SST TSOP Devices, which
describes how to use both packages in the same design.
Note that the same comparisons as above apply between
the M29W002 and the SST39VF020.
• 4M Pinout Comparison
The SST39SF040 is fully pin compatible with the M29F040
in PLCC and PDIP packages. For TSOP packages, ST
Micro has an 8mm x 20mm package, as opposed to SST’s
8mm x 14mm package. Please refer to the application
note, Recommended Land Pattern for SST TSOP Devices,
which describes how to use both packages in the same
design.
©2005 Silicon Storage Technology, Inc.
5
Note that the same comparisons as above apply between
the M29W040 and the SST39VF040.
Software Comparisons
The SST and ST Micro devices use the same command
set for Byte-Program, Chip-Erase, Read-ID and Reset
operation as described in the table below. Note that
although the following notes describe the difference
between 5V flash from ST Micro and SST, identical com-
parisons are valid for describing the 3V flash from ST Micro
and SST.
TABLE 7: C
The primary difference is Sector-Erase operation which is
described here: The Sector-Erase operation for both
SST39 and ST Micro devices use the same six-byte com-
mand sequence with the same command data of 30H, but
different sector addresses during that byte-sequence. This
is due to the difference in sector sizes of the SST and ST
Micro.
•
Command
Byte-Program
Chip-Erase
Sector-Erase
Software Exit
ID/Reset
Read-ID
Erase-Suspend/
-Resume
For the M29F512, the primary difference between
SST and ST Micro is the Sector-Erase operation,
which is not offered by the ST Micro M29F512 device.
ST Micro has a boot block of 8 KByte, and a single
block comprising the remainder of the memory, and
they only support Chip-Erase. SST, on the other hand,
has uniform 4 KByte sectors on the SST39SF512. As
a result, a SST39SF512 device can use the same
software as the ST Micro M29F512 device, since
SST39SF512 device offers both Sector-Erase and
Chip-Erase.
Some ST Micro designs may protect this 8 KByte
sector, so that, during Chip-Erase, this sector is not
erased with the other block. If this feature is enabled,
then the software would have to be modified to do
Sector-Erase operations on the SST device in place of
the Chip-Erase on the protected ST Micro device, so
that the sectors corresponding to the boot block are
OMMAND
SST
4-Byte
6-Byte
6-Byte (30H)
1-Byte
3-Byte
Not required
S
EQUENCE
C
OMPARISONS
ST MICRO
Same
Same
6-Byte (30H)
different sector
address
Same
Same
1-Byte
S72014-04-000
Application Note
T7.0 2014
10/05