DataSheetWiki


M48T212Y fiches techniques PDF

ST Microelectronics - 5V/3.3V TIMEKEEPER[ CONTROLLER

Numéro de référence M48T212Y
Description 5V/3.3V TIMEKEEPER[ CONTROLLER
Fabricant ST Microelectronics 
Logo ST Microelectronics 





1 Page

No Preview Available !





M48T212Y fiche technique
M48T212Y
M48T212V
5V/3.3V TIMEKEEPER® CONTROLLER
s CONVERTS LOW POWER SRAM into
NVRAMs
s YEAR 2000 COMPLIANT (4-Digit Year)
s BATTERY LOW FLAG
s INTEGRATED REAL TIME CLOCK,
POWER-FAIL CONTROL CIRCUIT, BATTERY
and CRYSTAL
s AUTOMATIC POWER-FAIL CHIP DESELECT
and WRITE PROTECTION
s WATCHDOG TIMER
s CHOICE of WRITE PROTECT VOLTAGES
(VPFD = Power-fail Deselect Voltage):
– M48T212Y: 4.2V VPFD 4.5V
– M48T212V: 2.7V VPFD 3.0V
s MICROPROCESSOR POWER-ON RESET
s PROGRAMMABLE ALARM OUTPUT ACTIVE
in the BATTERY BACKED-UP MODE
s PACKAGING INCLUDES a 44-LEAD SOIC and
SNAPHAT® TOP (to be Ordered Separately)
DESCRIPTION
The M48T212Y/V are self-contained devices that
include a real time clock (RTC), programmable
alarms, a watchdog timer, and two external chip
enable outputs which provide control of up to four
(two in parallel) external low-power static RAMs.
Access to all TIMEKEEPER® functions and the
external RAM is the same as conventional byte-
wide SRAM. The 16 TIMEKEEPER Registers offer
Century, Year, Month, Date, Day, Hour, Minute,
Second, Calibration, Alarm, Watchdog, and Flags.
Externally attached static RAMs are controlled by
the M48T212Y/V via the E1CON and E2CON sig-
nals (see Table 4).
The 44 pin 330mil SOIC provides sockets with
gold plated contacts at both ends for direct con-
nection to a separate SNAPHAT housing contain-
ing the battery and crystal. The unique design
allows the SNAPHAT battery package to be
mounted on top of the SOIC package after the
completion of the surface mount process.
SNAPHAT (SH)
Battery
44
1
SOH44 (MH)
Figure 1. Logic Diagram
VCC VCCSW
4
A0-A3
A
E
EX
W
G
WDI
RSTIN1
RSTIN2
M48T212Y
M48T212V
8
DQ0-DQ7
IRQ/FT
RST
E1CON
E2CON
VOUT
VSS
AI03019
April 2000
1/23

PagesPages 23
Télécharger [ M48T212Y ]


Fiche technique recommandé

No Description détaillée Fabricant
M48T212A 3.3V TIMEKEEPER CONTROLLER ST Microelectronics
ST Microelectronics
M48T212V 3.3V TIMEKEEPER supervisor ST Microelectronics
ST Microelectronics
M48T212Y 5V/3.3V TIMEKEEPER[ CONTROLLER ST Microelectronics
ST Microelectronics

US18650VTC5A

Lithium-Ion Battery

Sony
Sony
TSPC106

PCI Bus Bridge Memory Controller

ATMEL
ATMEL
TP9380

NPN SILICON RF POWER TRANSISTOR

Advanced Semiconductor
Advanced Semiconductor


www.DataSheetWiki.com    |   2020   |   Contactez-nous  |   Recherche