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M48T212Y-85MH1TR PDF预览

M48T212Y-85MH1TR

更新时间: 2024-11-10 22:08:55
品牌 Logo 应用领域
意法半导体 - STMICROELECTRONICS 计时器或实时时钟微控制器和处理器外围集成电路光电二极管双倍数据速率
页数 文件大小 规格书
23页 151K
描述
5V/3.3V TIMEKEEPER[ CONTROLLER

M48T212Y-85MH1TR 技术参数

生命周期:Obsolete零件包装代码:SOIC
包装说明:SNAPHAT, PLASTIC, SO-44针数:44
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.84
Is Samacsys:N最大时钟频率:0.032 MHz
外部数据总线宽度:8信息访问方法:PARALLEL, DIRECT ADDRESS
JESD-30 代码:R-PDSO-G44端子数量:44
计时器数量:最高工作温度:70 °C
最低工作温度:封装主体材料:PLASTIC/EPOXY
封装代码:SOP封装形状:RECTANGULAR
封装形式:SMALL OUTLINE认证状态:Not Qualified
最大供电电压:5.5 V最小供电电压:4.5 V
标称供电电压:5 V表面贴装:YES
技术:CMOS温度等级:COMMERCIAL
端子形式:GULL WING端子位置:DUAL
uPs/uCs/外围集成电路类型:TIMER, REAL TIME CLOCKBase Number Matches:1

M48T212Y-85MH1TR 数据手册

 浏览型号M48T212Y-85MH1TR的Datasheet PDF文件第2页浏览型号M48T212Y-85MH1TR的Datasheet PDF文件第3页浏览型号M48T212Y-85MH1TR的Datasheet PDF文件第4页浏览型号M48T212Y-85MH1TR的Datasheet PDF文件第5页浏览型号M48T212Y-85MH1TR的Datasheet PDF文件第6页浏览型号M48T212Y-85MH1TR的Datasheet PDF文件第7页 
M48T212Y  
M48T212V  
5V/3.3V TIMEKEEPER CONTROLLER  
CONVERTS LOW POWER SRAM into  
SNAPHAT (SH)  
Battery  
NVRAMs  
YEAR 2000 COMPLIANT (4-Digit Year)  
BATTERY LOW FLAG  
INTEGRATED REAL TIME CLOCK,  
POWER-FAIL CONTROL CIRCUIT, BATTERY  
and CRYSTAL  
AUTOMATIC POWER-FAIL CHIP DESELECT  
and WRITE PROTECTION  
44  
WATCHDOG TIMER  
1
CHOICE of WRITE PROTECT VOLTAGES  
(V  
= Power-fail Deselect Voltage):  
PFD  
SOH44 (MH)  
– M48T212Y: 4.2V V  
– M48T212V: 2.7V V  
4.5V  
3.0V  
PFD  
PFD  
Figure 1. Logic Diagram  
MICROPROCESSOR POWER-ON RESET  
PROGRAMMABLE ALARM OUTPUT ACTIVE  
in the BATTERY BACKED-UP MODE  
V
V
CCSW  
PACKAGING INCLUDES a44-LEAD SOIC and  
CC  
SNAPHAT TOP (to be Ordered Separately)  
4
8
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  
A0-A3  
DQ0-DQ7  
A
E
IRQ/FT  
RST  
EX  
M48T212Y  
M48T212V  
W
E1  
E2  
CON  
CON  
G
WDI  
RSTIN1  
RSTIN2  
the M48T212Y/V via the E1  
nals (see Table 4).  
and E2  
sig-  
CON  
CON  
V
OUT  
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.  
V
SS  
AI03019  
April 2000  
1/23  

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