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| 型号： | M48T212V-85MH1E |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | REAL TIME CLOCK, PDSO44 |
| 封装： | 0.330 INCH, ROHS COMPLIANT, PLASTIC, SOH-44 |
| 文件页数： | 31/35页 |
| 文件大小： | 348K |
| 代理商： | M48T212V-85MH1E |
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Product(s)
M48T212V
Description
1
Description
The M48T212V is a self-contained device that includes 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
The 44-pin, 330mil SOIC provides sockets with gold plated contacts at both ends for direct
connection to a separate SNAPHAT housing containing 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.
Insertion of the SNAPHAT housing after reflow prevents potential battery and crystal
damage due to the high temperatures required for device surface-mounting. The SNAPHAT
housing is keyed to prevent reverse insertion.
The SOIC and battery/crystal packages are shipped separately in plastic anti-static tubes or
in Tape & Reel form. For the-44 lead SOIC, the battery/crystal package (e.g., SNAPHAT)
part number is “M4TXX-BR12SH” (see Table 20 on page 33).
Caution:
Do not place the SNAPHAT battery/crystal top in conductive foam, as this will drain the
lithium button-cell battery.
Figure 1.
Logic diagram
AI03019
4
A0-A3
A
DQ0-DQ7
VCC
M48T212V
G
VSS
8
EX
E2CON
E1CON
W
RSTIN2
RSTIN1
RST
IRQ/FT
VOUT
WDI
E
VCCSW
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| M48T35V-10MH1 | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| M48T35V-10MH1TR | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| M48T512V-85PM1 | 0 TIMER(S), REAL TIME CLOCK, PDIP32 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M48T212V-85MH1F | 功能描述:监控电路 SRAM TK 16X8 85ns RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| M48T212V-85MH1TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212V-85MH6 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212V-85MH6E | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
| M48T212V-85MH6F | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
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