BQ4802YDW集成电路（IC）的实时时钟规格书PDF中文资料

BQ4802YDW属于集成电路（IC）的实时时钟。由美国德州仪器公司制造生产的BQ4802YDW实时时钟实时时钟 (RTC) 为几乎所有需要保持精确时间的电子设备提供时间和/或日期信息。时钟类型有二进制计数器、时钟/日历/监控器、历时计时器、幻时钟芯片、便携式系统控制器、温度记录器、时间事件记录器和计时器时钟外设。其包含 2 B 至 2 MB 不等的存储器，接口选项有 I2C、并行、串行、SPI、1 线式、2 线式、3 线式和 4 线式。

FEATURES

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

DESCRIPTION

The bq4802Y/bq4802LY real-time clock is a low-power

microprocessor peripheral that integrates a time-ofday

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.