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M40SZ100 bảng dữ liệu(PDF) 3 Page - STMicroelectronics

tên linh kiện M40SZ100
Giải thích chi tiết về linh kiện  5V or 3V NVRAM SUPERVISOR FOR LPSRAM
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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M40SZ100 bảng dữ liệu(HTML) 3 Page - STMicroelectronics

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M40SZ100Y, M40SZ100W
SUMMARY DESCRIPTION
The M40SZ100Y/W NVRAM Controller is a self-
contained device which converts a standard low-
power SRAM into a non-volatile memory. A preci-
sion voltage reference and comparator monitors
the VCC input for an out-of-tolerance condition.
When an invalid VCC condition occurs, the condi-
tioned chip enable output (ECON) is forced inactive
to write protect the stored data in the SRAM. Dur-
ing a power failure, the SRAM is switched from the
VCC pin to the lithium cell within the SNAPHAT (or
external battery for the 16-lead SOIC) to provide
the energy required for data retention. On a sub-
sequent power-up, the SRAM remains write pro-
tected until a valid power condition returns.
The 28-pin, 330 mil SOIC provides sockets with
gold plated contacts for direct connection to a sep-
arate SNAPHAT® housing containing the battery.
The SNAPHAT housing has gold plated pins
which mate with the sockets, ensuring reliable
connection. The housing is keyed to prevent im-
proper insertion. This unique design allows the
SNAPHAT battery package to be mounted on top
of the SOIC package after the completion of the
surface mount process which greatly reduces the
board manufacturing process complexity of either
directly soldering or inserting a battery into a sol-
dered holder. Providing non-volatility becomes a
“SNAP.” This feature is also available in the “top-
less” 16-pin SOIC package (MQ).
Insertion of the SNAPHAT housing after reflow
prevents potential battery damage due to the high
temperatures required for device surface-mount-
ing. The SNAPHAT housing is also keyed to pre-
vent reverse insertion.
The 28-pin SOIC and battery packages are
shipped separately in plastic anti-static tubes or in
Tape & Reel form. For the 28-lead SOIC, the bat-
tery/crystal package (e.g., SNAPHAT) part num-
ber is “M4ZXX-BR00SH” (see Table 13, page 17).
Caution: Do not place the SNAPHAT battery top
in conductive foam, as this will drain the lithium
button-cell battery.
Figure 3. Logic Diagram
Note: 1. For 16-pin SOIC package only.
Table 1. Signal Names
Note: 1. For SO16 only.
AI03933
VCC
M40SZ100Y
M40SZ100W
BL
VSS
E
VOUT
PFI
ECON
PFO
RST
RSTIN
VBAT
(1)
E
Chip Enable Input
ECON
Conditioned Chip Enable Output
RST
Reset Output (Open Drain)
RSTIN
Reset Input
BL
Battery Low Output (Open Drain)
VOUT
Supply Voltage Output
VCC
Supply Voltage
VBAT
(1)
Back-up Supply Voltage
PFI
Power Fail Input
PFO
Power Fail Output
VSS
Ground
NC
Not Connected Internally


Số phần tương tự - M40SZ100

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
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Mô tả tương tự - M40SZ100

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