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DS12885T/R规格书详情
General Description
The DS12885, DS12887, and DS12C887 real-time clocks (RTCs) are designed to be direct replacements for the DS1285 and DS1287. The devices provide a real-time clock/calendar, one time-of-day alarm, three maskable interrupts with a common interrupt output, a programmable square wave, and 114 bytes of battery backed static RAM (113 bytes in the DS12C887 and DS12C887A). The DS12887 integrates a quartz crystal and lithium energy source into a 24-pin encapsulated DIP package.
Features
♦ Drop-In Replacement for IBM AT Computer Clock/Calendar
♦ RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Through 2099
♦ Binary or BCD Time Representation
♦ 12-Hour or 24-Hour Clock with AM and PM in 12-Hour Mode
♦ Daylight Saving Time Option
♦ Selectable Intel or Motorola Bus Timing
♦ Interfaced with Software as 128 RAM Locations
♦ 14 Bytes of Clock and Control Registers
♦ 114 Bytes of General-Purpose, Battery-Backed RAM (113 Bytes in the DS12C887 and DS12C887A)
♦ RAM Clear Function (DS12885, DS12887A, and DS12C887A)
♦ Interrupt Output with Three Independently Maskable Interrupt Flags
♦ Time-of-Day Alarm Once Per Second to Once Per Day
♦ Periodic Rates from 122μs to 500ms
♦ End-of-Clock Update Cycle Flag
♦ Programmable Square-Wave Output
♦ Automatic Power-Fail Detect and Switch Circuitry
♦ Optional 28-Pin PLCC Surface Mount Package or 32-Pin TQFP (DS12885)
♦ Optional Encapsulated DIP (EDIP) Package with Integrated Crystal and Battery (DS12887, DS12887A, DS12C887, DS12C887A)
♦ Optional Industrial Temperature Range Available
♦ Underwriters Laboratory (UL) Recognized
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
MAXIM |
21+ |
TQFP-32 |
6000 |
原装现货 |
询价 | ||
MAXIM |
2016+ |
TQFP32 |
3526 |
假一罚十进口原装现货原盘原标! |
询价 | ||
MAXIM |
23+ |
TQFP |
8888 |
专做原装正品,假一罚百! |
询价 | ||
DALLAS |
23+ |
TQFP |
65480 |
询价 | |||
MAXIM/美信 |
23+ |
TQFP-32 |
30000 |
原装正品公司现货,假一赔十! |
询价 | ||
MAX |
QFP |
68900 |
原包原标签100%进口原装常备现货! |
询价 | |||
Maxim |
21+ |
25000 |
原厂原包 深圳现货 主打品牌 假一赔百 可开票! |
询价 | |||
MAXIM |
19+ |
QFP |
256800 |
原厂代理渠道,每一颗芯片都可追溯原厂; |
询价 | ||
MAX |
20+ |
32-TQFP |
65790 |
原装优势主营型号-可开原型号增税票 |
询价 | ||
Maxim |
23+ |
原厂封装 |
3977 |
优势现货 |
询价 |