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参数资料
| 型号： | DS1314E+T&R |
| 厂商： | Maxim Integrated |
| 文件页数： | 6/12页 |
| 文件大小： | 0K |
| 描述： | IC CTRL NV W/BATT MON 3V 20TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 控制器类型： | 非易失性 RAM |
| 电源电压： | 3 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 带卷 (TR) |
DS1314
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battery. Should BW not deactivate for this reason, the new battery can be detached for tBDBA and then re-
attached to clear BW .
NOTE: The DS1314 cannot constantly monitor an attached battery because such monitoring would
drastically reduce the life of the battery. As a result, the DS1314 only tests the battery for one second out
of every 24 hours and does not monitor the battery in any way between tests. If a good battery (one that
has not been previously flagged with BW ) is removed between battery tests, the DS1314 may not
immediately sense the removal and may not activate BW until the next scheduled battery test. If a battery
is then reattached to the DS1314, the battery may not be tested until the next scheduled test.
NOTE: Battery monitoring is only a useful technique when testing can be done regularly over the entire
life of a lithium battery. Because the DS1314 only performs battery monitoring when VCC is nominal,
systems which are powered-down for excessively long periods can completely drain their lithium cells
without receiving any advanced warning. To prevent such an occurrence, systems using the DS1314
battery monitoring feature should be powered-up periodically (at least once every few months) in order to
perform battery testing. Furthermore, anytime BW is activated on the first battery test after a power-up,
data integrity should be checked via checksum or other technique.
POWER MONITORING
DS1314S and DS1314E varieties have an additional reset pin. These varieties detect out-of-tolerance
power supply conditions and warn a processor-based system of impending power failure. When VCCI falls
below the trip point level defined by the TOL pin (VCCTP), the VCCI comparator activates the reset signal
RST
. Reset occurs at 3.0V nominal (3.3V supply) when the TOL pin is connected to GND or at 2.7V
nominal (3.0V supply) when TOL is connected to VCCO.
RST
also serves as a power-on reset during power-up. After VCCI exceeds VCCTP, RST will be held active
for 200 ms nominal (tRPU). This reset period is sufficiently long to prevent system operation during
power-on transients and to allow tREC to expire. RST has an open-drain output driver.
FRESHNESS SEAL MODE
When the battery is first attached to the DS1314 without VCC power applied, the device does not
immediately provide battery-backup power on VCCO. Only after VCCI exceeds VCCTP and later falls below
both VSW and VBAT will the DS1314 leave Freshness Seal Mode and provide battery-backup power. This
mode allows a battery to be attached during manufacturing but not used until after the system has been
activated for the first time. As a result, no battery energy is drained during storage and shipping.
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相关代理商/技术参数 |
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|---|---|
| DS1314S | 功能描述:IC CTRLR NV W/BATT MON 3V 16SOIC RoHS:否 类别:集成电路 (IC) >> 存储器 - 控制器 系列:- 标准包装:45 系列:- 控制器类型:静态 RAM（SRAM） 电源电压:4.5 V ~ 5.5 V 工作温度:0°C ~ 70°C 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 供应商设备封装:16-SOIC W 包装:管件 |
| DS1314S/T&R | 制造商:Maxim Integrated Products 功能描述:NV CONTRL 3V BW&RST 16-SOIC T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC CTRLR NV W/BATT MON 3V 16SOIC |
| DS1314S/T&R/C03 | 制造商:Maxim Integrated Products 功能描述:NV CONTRL 3V BW&RST 16P SOIC TR IBM - Tape and Reel |
| DS1314S/T&R | 功能描述:IC CTRLR NV W/BATT MON 3V 16SOIC RoHS:否 类别:集成电路 (IC) >> 存储器 - 控制器 系列:- 标准包装:45 系列:- 控制器类型:静态 RAM（SRAM） 电源电压:4.5 V ~ 5.5 V 工作温度:0°C ~ 70°C 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 供应商设备封装:16-SOIC W 包装:管件 |
| DS1314S+ | 功能描述:存储器控制器 3V Cntlr w/Lithium Battery Monitor RoHS:否 制造商:Maxim Integrated |
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