DS12B887中文资料PDF规格书
DS12B887规格书详情
DESCRIPTION
The DS12B887 Real Time Clock plus RAM is designed to be a direct replacement for the DS1287A or DS12887A. The DS12B887 is identical in form, fit, and function to the DS1287A or DS12887A, with the exception of RCLR, and has an additional 64 bytes of general purpose RAM.
FEATURES
• Drop-in replacement for IBM AT computer clock/calendar
• Pin compatible with the MC146818B and DS1287
• Totally nonvolatile with over 10 years of operation in the absence of power
• Self-contained subsystem includes lithium, quartz, and support circuitry
• Counts seconds, minutes, hours, days, day of the week, date, month, and year with leap year compensation
• Binary or BCD representation of time, calendar, and alarm
• 12- or 24-hour clock with AM and PM in 12-hour mode
• Daylight Savings Time option
• Multiplex bus for pin efficiency
• Interfaced with software as 128 RAM locations
– 14 bytes of clock and control registers
– 114 bytes of general purpose RAM
• Programmable square wave output signal
• Bus-compatible interrupt signals (IRQ)
• Three interrupts are separately software-maskable and testable
– Time-of-day alarm once/second to once/day
– Periodic rates from 122 µs to 500 ms
– End of clock update cycle
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
DALLAS菲律宾 |
22+ |
DIP |
30000 |
十七年VIP会员,诚信经营,一手货源,原装正品可零售! |
询价 | ||
23+ |
N/A |
45980 |
正品授权货源可靠 |
询价 | |||
DALLAS |
1997+ |
模块-19 |
350 |
原装现货海量库存欢迎咨询 |
询价 | ||
DALLAS |
23+ |
NA/ |
12 |
优势代理渠道,原装正品,可全系列订货开增值税票 |
询价 | ||
DALLAS |
23+ |
DIP |
8000 |
专注配单,只做原装进口现货 |
询价 | ||
DALLAS |
2023+ |
DIP |
16800 |
芯为只有原装 |
询价 | ||
DS |
21+ |
5000 |
自家现货!有单随时欢迎骚扰! |
询价 | |||
DALLAS |
2020+ |
DIP |
16800 |
绝对原装进口现货,假一赔十,价格优势!? |
询价 | ||
DALLAS |
2048+ |
DIP |
9852 |
只做原装正品现货!或订货假一赔十! |
询价 | ||
DALLAS |
96+ |
8 |
全新原装进口自己库存优势 |
询价 |