DataSheet.es    


PDF M48T251V Data sheet ( Hoja de datos )

Número de pieza M48T251V
Descripción 5.0 or 3.3V / 4096K TIMEKEEPER SRAM with PHANTOM
Fabricantes ST Microelectronics 
Logotipo ST Microelectronics Logotipo



Hay una vista previa y un enlace de descarga de M48T251V (archivo pdf) en la parte inferior de esta página.


Total 24 Páginas

No Preview Available ! M48T251V Hoja de datos, Descripción, Manual

M48T251Y
M48T251V
5.0 or 3.3V, 4096K TIMEKEEPER® SRAM with PHANTOM
FEATURES SUMMARY
s 5.0V OR 3.3V OPERATING VOLTAGE
s REAL TIME CLOCK KEEPS TRACK OF
TENTHS/HUNDREDTHS OF SECONDS,
SECONDS, MINUTES, HOURS, DAYS, DATE
OF THE MONTH, MONTHS, and YEARS
s AUTOMATIC LEAP YEAR CORRECTION
VALID UP TO THE YEAR 2100
s AUTOMATIC SWITCH-OVER and DESELECT
CIRCUITRY
s CHOICE OF POWER-FAIL DESELECT
VOLTAGES:
(VPFD = Power-fail Deselect Voltage):
– M48T251Y: 4.25V VPFD 4.50V
– M48T251V: 2.80V VPFD 2.97V
s FULL 10% VCC OPERATING RANGE
s OVER 10 YEARS’ DATA RETENTION IN THE
ABSENCE OF POWER
s WATCH FUNCTION IS TRANSPARENT TO
RAM OPERATION
s 512K x 8 NV SRAM DIRECTLY REPLACES
VOLATILE STATIC RAM OR EEPROM
Figure 1. 32-pin, DIP Package
32
1
PMDIP32 (PM)
March 2003
Rev. 2.0
1/24

1 page




M48T251V pdf
Figure 4. Block Diagram
M48T251Y, M48T251V
CE
OE
WE
RST
32.768 Hz
CRYSTAL
CONTROL
LOGIC
READ
WRITE
POWER
FAIL
XO
CLOCK/CALENDAR
LOGIC
XI
UPDATE
TIMEKEEPER
REGISTER
SRAM
ACCESS
ENABLE
SEQUENCE
DETECTOR
COMPARISON
REGISTER
A0–A16
DQ0–DQ7
DQ0
I/O
BUFFERS
VCC
DATA
INTERNAL VCC
POWER-FAIL
DETECT
LOGIC
VBAT
AI04238
5/24

5 Page





M48T251V arduino
Figure 8. Memory WRITE Cycle 2
WE = VIH
ADDRESSES
CE
WE
VVIIHL
tAW
VIH
tCOE
M48T251Y, M48T251V
tWC
VVIIHL VVIIHL
tWP tWR
VIL VIL VIH
tOEW
VIL VIL
tODW
DQ0–DQ7
tDS tDH
VVIIHL
DATA IN
STABLE
VVIIHL
AI04232
Note: 1. OE = VIH or VIL. If OE = VIH during a WRITE cycle, the output buffers remain in a high impedance state.
2. If WE is low or the WE low transition occurs prior to or simultaneously with the CE low transition, the output buffers remain in a high
impedance state during this period.
11/24

11 Page







PáginasTotal 24 Páginas
PDF Descargar[ Datasheet M48T251V.PDF ]




Hoja de datos destacado

Número de piezaDescripciónFabricantes
M48T251V5.0 or 3.3V / 4096K TIMEKEEPER SRAM with PHANTOMST Microelectronics
ST Microelectronics
M48T251Y5.0 or 3.3V / 4096K TIMEKEEPER SRAM with PHANTOMST Microelectronics
ST Microelectronics

Número de piezaDescripciónFabricantes
SLA6805M

High Voltage 3 phase Motor Driver IC.

Sanken
Sanken
SDC1742

12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.

Analog Devices
Analog Devices


DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares,
permitiéndote verlos en linea o descargarlos en PDF.


DataSheet.es    |   2020   |  Privacy Policy  |  Contacto  |  Buscar