M48T08-150PC1 STMicroelectronics, M48T08-150PC1 Datasheet - Page 13

• Manufacturer Part Number: M48T08-150PC1
• Description: IC TIMEKPR NVRAM 64KBIT 5V 28-DI
• Manufacturer: STMicroelectronics
• Series: Timekeeper®r
• Type: Clock/Calendar/NVSRAMr

Specifications of M48T08-150PC1

• Memory Size: 64K (8K x 8)
• Time Format: HH:MM:SS (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: Parallel
• Voltage - Supply: 4.75 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 28-DIP Module (600 mil), 28-EDIP
• Function: Clock/Calendar/NV Timekeeping RAM/Battery Backup
• Rtc Memory Size: 8192 Byte
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.75 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: Through Hole
• Rtc Bus Interface: Parallel
• Capacitance, Input: 10 pF
• Capacitance, Output: 10 pF
• Current, Input, Leakage: ±1 μA
• Current, Operating: 80 mA
• Current, Output, Leakage: ±1
• Data Retention: 10 yrs.
• Density: 64K
• Memory Type: Non-Volatile SRAM
• Organization: 8K×8
• Package Type: PCDIP28
• Power Dissipation: 1 W
• Temperature, Operating: 0 to +70 °C
• Time, Access: 150 ns
• Time, Fall: ≤5 ns
• Time, Rise: ≤5 ns
• Voltage, Input, High: 5.05 to 5.8 V
• Voltage, Input, Low: 0.8 V
• Voltage, Output, High: 2.4 V
• Voltage, Output, Low: 0.4 V
• Voltage, Supply: 4.75 to 5.5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-2829-5

M48T08, M48T08Y, M48T18
2.3
Note:
Note:
2.4
Data retention mode
With valid V
RAM. Should the supply voltage decay, the RAM will automatically power-fail deselect, write
protecting itself when V
become high impedance, and all inputs are treated as “Don't care.”
A power failure during a WRITE cycle may corrupt data at the currently addressed location,
but does not jeopardize the rest of the RAM's content. At voltages below V
user can be assured the memory will be in a write protected state, provided the V
is not less than t
reach into the deselect window during the time the device is sampling V
decoupling of the power supply lines is recommended.
When V
preserves data and powers the clock. The internal button cell will maintain data in the
M48T08/18/08Y for an accumulated period of at least 10 years when V
Requires use of M4T32-BR12SH SNAPHAT
As system power returns and V
power supply is switched to external V
Write protection continues until V
high or E2 low as V
system stabilization. Normal RAM operation can resume t
For more information on battery storage life refer to the application note AN1012.
Power-fail interrupt pin
The M48T08/18/08Y continuously monitors V
point, an interrupt is immediately generated. An internal clock provides a delay of between
10 µs and 40 µs before automatically deselecting the M48T08/18/08Y. The INT pin is an
open drain output and requires an external pull-up resistor, even if the interrupt output
function is not being used.
CC
drops below V
CC
applied, the M48T08/18/08Y operates as a conventional BYTEWIDE™ static
F
. The M48T08/18/08Y may respond to transient noise spikes on V
CC
rises past V
CC
SO
falls within the V
, the control circuit switches power to the internal battery which
Doc ID 2411 Rev 10
CC
CC
PFD
rises above V
reaches V
CC
(min) to prevent inadvertent WRITE cycles prior to
.
PFD
®
CC
top when using the SOH28 package.
PFD
(max), V
. When V
SO
(min) plus t
, the battery is disconnected and the
PFD
CC
rec
(min) window. All outputs
falls to the power-fail detect trip
after V
rec
(min). E1 should be kept
CC
exceeds V
CC
CC
Operation modes
is less than V
. Therefore,
PFD
(min), the
CC
PFD
CC
fall time
(max).
that
13/31
SO
.