BQ4802LY_TI 具有 CPU 监控器和外部 NVSRAM 控制的符合 Y2K 的并行 RTC，3V Vcc

BQ4802LY的基本参数

制造厂商：TI
产品类别：时钟和计时
技术类目：实时时钟 (RTC) 和计时器
功能描述：具有 CPU 监控器和外部 NVSRAM 控制的符合 Y2K 的并行 RTC，3V Vcc
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BQ4802LY的产品详情：

The bq4802Y/bq4802LY real-time clock is a low-power microprocessor peripheral that integrates a time-of-day clock, a century-based calendar, and a CPU supervisor, with package options including a 28-pin SOIC, TSSOP, or SNAPHAT that requires the bq48SH-28x6 to complete the two-piece module. The bq4802Y/ bq4802LY is ideal for fax machines, copiers, industrial control systems, point-of-sale terminals, data loggers, and computers.

The bq4802Y/bq4802LY provides direct connections for a 32.768-kHz quartz crystal and a 3-V backup battery. Through the use of the conditional chip enable output (CE\_OUT) and battery voltage output (V_OUT) pins, the bq4802Y/bq4802LY can write-protect and make non- volatile external SRAMs. The backup cell powers the real-time clock and maintains SRAM information the absence of system voltage. The crystal and battery are contained within the modules for a more integrated solution.

The bq4802Y/bq4802LY contains a temperature-compensated reference and comparator circuit that monitors the status of its voltage supply. When the bq4802Y/bq4802LY detects an out-of-tolerance condition, it generates an interrupt warning and subsequently a microprocessor reset. The reset stays active for 200 ms after V_CC rises within tolerance, to allow for power supply and processor stabilization. The reset function also allows for an external push-button override.

BQ4802LY的优势和特性：

Real-Time Clock Counts Seconds Through Centuries in BCD Format
- bq4802Y: 5-V Operation
- bq4802LY: 3.3-V Operation
On-Chip Battery-Backup Switchover Circuit With Nonvolatile Control for External SRAM
Less Than 500 nA of Clock Operation Current in Backup Mode
Microprocessor Reset With Push-Button Override
Independent Watchdog Timer With Programmable Time-Out Period
Power-Fail Interrupt Warning
Programmable Clock Alarm Interrupt Active in Battery-Backup Mode
Programmable Periodic Interrupt
Battery-Low Warning
28-pin SOIC, TSSOP, and SNAPHAT Package Options
APPLICATIONS
- Telecommunications Base Stations
- Servers
- Handheld Data Collection Equipment
- Medical Equipment
- Handheld Instrumentation
- Test Equipment

BQ4802LY的参数（英文）：

Iq (Typ) (uA)
0.5
Features
External SRAM control, Integrated CPU supervisor, Parallel bus interface, 16 RTC bytes
Rating
Catalog
Operating temperature range (C)
0 to 70
Supply voltage (Max) (V)
3.6
Supply voltage (Min) (V)
2.7

BQ4802LY具体的完整产品型号参数及价格（美元）：

BQ4802LY的完整型号有：BQ4802LYDW、BQ4802LYDWR、BQ4802LYPW、BQ4802LYPWR，以下是这些产品的关键参数及官网采购报价：

BQ4802LYDW，工作温度：0 to 70，封装：SOIC (DW)-28，包装数量MPQ：20个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网BQ4802LYDW的批量USD价格：3.281（1000+）

BQ4802LYDWR，工作温度：0 to 70，封装：SOIC (DW)-28，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网BQ4802LYDWR的批量USD价格：2.756（1000+）

BQ4802LYPW，工作温度：0 to 70，封装：TSSOP (PW)-28，包装数量MPQ：50个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网BQ4802LYPW的批量USD价格：3.15（1000+）

BQ4802LYPWR，工作温度：0 to 70，封装：TSSOP (PW)-28，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网BQ4802LYPWR的批量USD价格：2.625（1000+）

BQ4802LY的评估套件：

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BQ4802LY的电路图解：

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