M48T513V-85CS1 STMicroelectronics, M48T513V-85CS1 Datasheet - Page 15

• Manufacturer Part Number: M48T513V-85CS1
• Manufacturer: STMicroelectronics
• Type: NVSRAMr

Specifications of M48T513V-85CS1

• Word Size: 8b
• Organization: 512x8
• Density: 4Mb
• Interface Type: Parallel
• Access Time (max): 85ns
• Operating Supply Voltage (typ): 3.3V
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 3V
• Operating Temp Range: 0C to 70C
• Pin Count: 32
• Mounting: Surface Mount
• Supply Current: 60mA
• Lead Free Status / RoHS Status: Supplier Unconfirmed

Data Retention Mode
With valid V
as a conventional BYTEWIDE static RAM. Should
the supply voltage decay, the RAM will automati-
cally deselect, write protecting itself when V
falls between V
outputs become high impedance and all inputs are
treated as “don’t care.”
Note: A power failure during a WRITE cycle may
corrupt data at the current addressed location, but
does not jeopardize the rest of the RAM’s content.
At voltages below V
in a write protected state, provided the V
time is not less than t
spond to transient noise spikes on V
Figure 12. Power Down/Up Mode AC Waveforms
Table 9. Power Down/Up AC Characteristics
Note: 1. Valid for Ambient Operating Temperature: T
Symbol
t
t
t
FB
t
REC
2. V
3. V
F
RB
t
R
(2)
(3)
es V
PFD
PFD
V CC
V PFD (max)
V PFD (min)
V SO
INPUTS
OUTPUTS
RST
PFD
(min) to V
(max) to V
CC
V
V
V
V
V
(min).
PFD
PFD
PFD
SS
PFD
applied, the M48T513Y/V operates
PFD
to V
(max) to V
(min) to V
(min) to V
(max) to RST High
SS
PFD
(max), V
PFD
PFD
fall time of less than t
F
(min) fall time of less than t
. The M48T513Y/V may re-
(min), the memory will be
(min) V
VALID
RECOGNIZED
SS
PFD
PFD
PFD
tF
V
(max) V
CC
CC
(min) V
(min) window. All
Rise Time
Fall Time
Parameter
CC
FB
CC
CC
may cause corruption of RAM data.
that cross
A
Rise Time
Fall Time
tFB
= 0 to 70 C; V
F
CC
may result in deselection/write protection not occurring until 200ms after V
(1)
fall
CC
CC
into the deselect window during the time the de-
vice is sampling V
power supply lines is recommended.
When V
switches power to the internal battery, preserving
data and powering the clock. The internal energy
source will maintain data in the M48T513Y/V for
an accumulated period of at least 10 years at room
temperature. As system power rises above V
the battery is disconnected, and the power supply
is switched to external V
t
more detailed review of lifetime calculations,
please see Application Note AN1012.
= 4.5 to 5.5V or 3.0 to 3.6V (except where noted).
REC
M48T513Y
M48T513V
after V
DON’T CARE
HIGH-Z
CC
CC
drops below V
tRB
reaches V
CC
Min
300
150
10
40
0
1
. Therefore, decoupling of the
M48T513Y, M48T513V
CC
PFD
. Deselect continues for
SO
tR
(max). For a further
, the control circuit
Max
200
tREC
RECOGNIZED
VALID
AI01805
Unit
ms
CC
s
s
s
s
s
15/31
pass-
SO
,