M41T315V-85MH6TR STMicroelectronics, M41T315V-85MH6TR Datasheet - Page 11
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M41T315V-85MH6TR
Manufacturer Part Number
M41T315V-85MH6TR
Description
Manufacturer
STMicroelectronics
Datasheet
1.M41T315V-85MH6TR.pdf
(30 pages)
Specifications of M41T315V-85MH6TR
Bus Type
Phantom Clock
Operating Supply Voltage (typ)
3.3V
Package Type
SOH
Operating Supply Voltage (max)
3.6V
Operating Supply Voltage (min)
3V
Operating Temperature Classification
Industrial
Operating Temperature (max)
85C
Operating Temperature (min)
-40C
Pin Count
28
Mounting
Surface Mount
Date Format
DW:DM:M:Y
Time Format
HH:MM:SS:hh
Lead Free Status / RoHS Status
Not Compliant
Table 2.
1. See
2.1
Figure 6.
Deselect
WRITE
READ
READ
Deselect
Deselect
Mode
Table 11 on page 21
WE
CEI
OE
Q
Operating modes
Non-volatile supervisor operation
A switch is provided to direct power from the battery input or V
voltage drop of 0.3 Volts. The V
CMOS SRAM. The M41T315Y/V/W safeguards the clock and RAM data by power-fail
detection and write protection.
Power-fail detection occurs when V
reference. The M41T315Y/V/W constantly monitors the V
than V
for external RAM write protection. During nominal supply conditions, CEO will track CEI with
a propagation delay. Internally, the M41T315Y/V/W aborts any data transfer in progress
without changing any of the device registers and prevents future access until V
V
Read mode waveforms
PFD
V
SO
.
4.5 to 5.5V
3.0 to 3.6V
2.7 to 3.3V
to V
Figure 5 on page 9
PFD
≤ V
V
PFD
, power-fail circuitry forces the chip enable output (CEO) to V
or
or
SO
CC
for details.
tCOE
(1)
(min)
(1)
tCO
tOEE
CEI
illustrates a typical RAM/clock interface.
V
V
V
V
X
X
IH
IL
IL
IL
tCW
tOW
tOE
CCO
OE
V
V
CCI
X
X
X
X
output pin is used to supply uninterrupted power to
IH
IL
DATA OUTPUT VALID
falls below V
tRC
WE
V
V
V
X
X
X
IH
IH
IL
PFD
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
D
tODO
tRR
D
tOD
IN
which is set by an internal bandgap
CCI
D
supply pin. When V
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
CCI
OUT
Q
to V
Battery back-up mode
CCO
CCI
CMOS standby
with a maximum
or V
AI04259
Standby
Power
Active
Active
Active
CCI
BAT
CCI
-0.2 volts
exceeds
is less
11/30