品牌索引
产品分类 > 小信号开关二极管> 瞬态电压抑制器TVS/ESD> 双极管二极管> 调谐二极管> 齐纳(稳压)二极管> 小信号肖特基二极管> 频带转换二极管> 中/高功率管> 射频PIN二极管> Sinterglass二极管> 整流器 > N沟道(N-Channel)> P沟道(P-Channel)> 双N沟道(Dual N-Channel)> 双P沟道(Dual P-Channel)> 双N和P沟道(Dual N and P-Channel)
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产品介绍 DS12885/DS12887/DS12887A/DS12C887/DS12C887Features
♦ 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 |
