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BQ4802YPW

更新时间： 2024-09-15 12:42:35
品牌 Logo 应用领域
德州仪器 - TI 监控时钟
页数 文件大小 规格书
26页 920K
描述
PARALLEL REAL-TIME CLOCK WITH CPU SUPERVISOR

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BQ4802YPW 数据手册

 浏览型号BQ4802YPW的Datasheet PDF文件第2页浏览型号BQ4802YPW的Datasheet PDF文件第3页浏览型号BQ4802YPW的Datasheet PDF文件第4页浏览型号BQ4802YPW的Datasheet PDF文件第5页浏览型号BQ4802YPW的Datasheet PDF文件第6页浏览型号BQ4802YPW的Datasheet PDF文件第7页 
bq4802Y  
bq4802LY  
www.ti.com  
SLUS464C – AUGUST 2000 – REVISED JUNE 2002  
PARALLEL REAL-TIME CLOCK WITH CPU SUPERVISOR AND  
EXTERNAL SRAM NONVOLATILE MEMORY BACKUP  
FEATURES  
APPLICATIONS  
D
Real-Time Clock Counts Seconds Through  
D
D
D
D
D
D
Telecommunications Base Stations  
Servers  
Centuries in BCD Format  
– bq4802Y: 5-V Operation  
– bq4802LY: 3.3-V Operation  
Handheld Data Collection Equipment  
Medical Equipment  
D
D
D
D
On-Chip Battery-Backup Switchover Circuit  
With Nonvolatile Control for External SRAM  
Handheld Instrumentation  
Test Equipment  
Less Than 500 nA of Clock Operation Current  
in Backup Mode  
Microprocessor Reset With Push-Button  
Override  
DESCRIPTION  
Independent Watchdog Timer With  
Programmable Time-Out Period  
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 super-  
visor, 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.  
D
Power-Fail Interrupt Warning  
D
Programmable Clock Alarm Interrupt Active  
in Battery-Backup Mode  
D
D
D
Programmable Periodic Interrupt  
Battery-Low Warning  
28-pin SOIC, TSSOP, and SNAPHAT Package  
Options  
5 kΩ  
TYPICAL APPLICATION  
V
bq4802  
CC  
RST  
A0–A3  
ADDRESS BUS  
DATA BUS  
TO µP  
WDO  
INT  
DQ0–DQ7  
CS  
CMOS SRAM  
FROM  
ADDRESS  
DECODE  
LOGIC  
62256L  
A0–A3  
ADDRESS BUS  
CE  
IN  
DQ0–DQ7  
DATA BUS  
V
V
OUT  
OUT  
CC  
CE  
OE  
FROM µP  
I/O LINE  
WDI  
CE  
WR  
OE  
READ/  
WRITE  
CONTROL  
FROM µP  
WE  
X1  
X2  
32.768 kHz  
CRYSTAL  
BC  
3 V  
LITHIUM  
CELL  
V
SS  
Pleasebe aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments  
semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date. Products  
conform to specifications per the terms of Texas Instruments standard warranty.  
Production processing does not necessarily include testing of all parameters.  
Copyright 2002, Texas Instruments Incorporated  
1234567...26

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BQ4802YPW 替代型号

型号 品牌 替代类型 描述 数据表
BQ4802YPWG4 TI

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