參數(shù)資料
型號： BQ4802LYDSH
廠商： TEXAS INSTRUMENTS INC
元件分類： XO, clock
英文描述： 1 TIMER(S), REAL TIME CLOCK, PDSO28
封裝： PLASTIC, SOP-28
文件頁數(shù)： 1/24頁
文件大小： 481K
代理商： BQ4802LYDSH
bq4802Y
bq4802LY
SLUS464C – AUGUST 2000 – REVISED JUNE 2002
PARALLEL REAL-TIME CLOCK WITH CPU SUPERVISOR AND
EXTERNAL SRAM NONVOLATILE MEMORY BACKUP
FEATURES
D Real-Time Clock Counts Seconds Through
Centuries in BCD Format
– bq4802Y: 5-V Operation
– bq4802LY: 3.3-V Operation
D On-Chip Battery-Backup Switchover Circuit
With Nonvolatile Control for External SRAM
D Less Than 500 nA of Clock Operation Current
in Backup Mode
D Microprocessor Reset With Push-Button
Override
D Independent Watchdog Timer With
Programmable Time-Out Period
D Power-Fail Interrupt Warning
D Programmable Clock Alarm Interrupt Active
in Battery-Backup Mode
D Programmable Periodic Interrupt
D Battery-Low Warning
D 28-pin SOIC, TSSOP, and SNAPHAT Package
Options
APPLICATIONS
D Telecommunications Base Stations
D Servers
D Handheld Data Collection Equipment
D Medical Equipment
D Handheld Instrumentation
D Test Equipment
DESCRIPTION
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.
TO
P
READ/
WRITE
CONTROL
FROM
P
FROM
P
I/O LINE
CEOUT
OE
WE
VOUT
VSS
CEIN
CS
INT
WDO
RST
32.768 kHz
CRYSTAL
A0–A3
DQ0–DQ7
WDI
ADDRESS BUS
DATA BUS
BC
X1
X2
DQ0–DQ7
DATA BUS
FROM
ADDRESS
DECODE
LOGIC
3 V
LITHIUM
CELL
bq4802
A0–A3
ADDRESS BUS
62256L
CMOS SRAM
OE WR
VCC
CE
5 k
VCC
TYPICAL APPLICATION
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.
Please be 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.
www.ti.com
Copyright
2002, Texas Instruments Incorporated
相關PDF資料
PDF描述
BQ4802YDSH 1 TIMER(S), REAL TIME CLOCK, PDSO28
BU-61743F4-112Q 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72
BU-61743F4-112W 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72
BU-61743F4-122Y 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72
BU-61743F4-132W 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP72
相關代理商/技術參數(shù)
參數(shù)描述
BQ4802LYDW 功能描述:實時時鐘 Parallel RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
BQ4802LYDWG4 功能描述:實時時鐘 Parallel RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
BQ4802LYDWR 功能描述:實時時鐘 Parallel RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
BQ4802LYDWRG4 功能描述:實時時鐘 Parallel RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
BQ4802LYPW 功能描述:實時時鐘 Parallel RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
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