Y2K-Compliant, Nonvolatile Timekeeping RAMs

DESCRIPTION The DS1744 is a full-function, year-2000-compliant (Y2KC), real-time clock/calendar (RTC) and 32k x 8 NV SRAM. User access to all registers within the DS1744 is accomplished with a byte-wide interface as shown in Figure 1. The RTC information and control bits reside in the eight upper

文件：348.67 Kbytes 頁(yè)數(shù)：18 Pages

DALLAS

Y2K-Compliant, Nonvolatile Timekeeping RAMs

文件：190.13 Kbytes 頁(yè)數(shù)：16 Pages

MAXIM

美信

Y2K-Compliant, Nonvolatile Timekeeping RAMs

文件：413.19 Kbytes 頁(yè)數(shù)：19 Pages

ARTSCHIP

絲?。?strong>DS1744；Package：EDIP；Y2K-Compliant, Nonvolatile Timekeeping RAMs

文件：413.19 Kbytes 頁(yè)數(shù)：19 Pages

ARTSCHIP

Y2K兼容、非易失時(shí)鐘RAM

DS1744是功能完備、2000年兼容(Y2KC)的實(shí)時(shí)時(shí)鐘/日歷(RTC)和32k x 8 NV SRAM。用戶可通過(guò)如完整數(shù)據(jù)資料中的圖1所示的單字節(jié)寬度的接口對(duì)DS1744內(nèi)部的所有寄存器進(jìn)行訪問(wèn)。RTC信息和控制位占用RAM中最高的8個(gè)地址。RTC寄存器包含世紀(jì)、年、月、日、星期、小時(shí)、分和秒數(shù)據(jù)，采用24小時(shí)BCD格式。器件可自動(dòng)對(duì)每個(gè)月份及閏年進(jìn)行日期校正。RTC時(shí)鐘寄存器采用雙緩沖，可避免在時(shí)鐘更新周期內(nèi)訪問(wèn)不正確的數(shù)據(jù)。雙緩沖系統(tǒng)還可以防止訪問(wèn)時(shí)間寄存器時(shí)導(dǎo)致倒數(shù)計(jì)時(shí)無(wú)法減少而引起的時(shí)間丟失。DS1744還包含電源失效電路，用于當(dāng)VCC電源超出容差時(shí)，禁止選通器件。由于低VCC ? 集成的NV SRAM、實(shí)時(shí)時(shí)鐘、晶體、電源失效控制電路和鋰電池\n? 訪問(wèn)時(shí)鐘寄存器方式與靜態(tài)RAM完全相同，這些寄存器位于RAM中最高的8個(gè)地址\n? 世紀(jì)字節(jié)寄存器；Y2K兼容\n? 完全的非易失性，可在缺少電源的條件下工作10年以上\n? BCD編碼的世紀(jì)、年、月、日、星期、小時(shí)、分和秒數(shù)據(jù)，可自動(dòng)進(jìn)行閏年補(bǔ)償至2100年\n? 電池電壓指示標(biāo)志\n? 電源失效寫保護(hù)，允許±10%的VCC電源容差\n? 鋰電池處于開(kāi)路的保鮮模式，直至首次電源加電\n? 僅對(duì)于DIP模塊\n? 標(biāo)準(zhǔn)的JEDEC字節(jié)寬度32k x 8靜態(tài)RAM引腳排列\(zhòng)n\n\n? 僅對(duì)于PowerCap模板\;

ADI

亞德諾

Y2K-Compliant, Nonvolatile Timekeeping RAMs

DESCRIPTION The DS1744 is a full-function, year-2000-compliant (Y2KC), real-time clock/calendar (RTC) and 32k x 8 NV SRAM. User access to all registers within the DS1744 is accomplished with a byte-wide interface as shown in Figure 1. The RTC information and control bits reside in the eight upper

文件：348.67 Kbytes 頁(yè)數(shù)：18 Pages

DALLAS

Y2K-Compliant, Nonvolatile Timekeeping RAMs

DESCRIPTION The DS1744 is a full-function, year-2000-compliant (Y2KC), real-time clock/calendar (RTC) and 32k x 8 NV SRAM. User access to all registers within the DS1744 is accomplished with a byte-wide interface as shown in Figure 1. The RTC information and control bits reside in the eight upper

文件：348.67 Kbytes 頁(yè)數(shù)：18 Pages

DALLAS

Y2K-Compliant, Nonvolatile Timekeeping RAMs

DESCRIPTION The DS1744 is a full-function, year-2000-compliant (Y2KC), real-time clock/calendar (RTC) and 32k x 8 NV SRAM. User access to all registers within the DS1744 is accomplished with a byte-wide interface as shown in Figure 1. The RTC information and control bits reside in the eight upper

文件：348.67 Kbytes 頁(yè)數(shù)：18 Pages

DALLAS

PowerCap with Crystal

GENERAL DESCRIPTION The DS9034PCX PowerCap is designed to be a lithium power source for nonvolatile timekeeping RAMs in Dallas Semiconductor’s directly surface-mountable PowerCap Module (PCM) package. After a PowerCap module board has been soldered in place and cleaned, the DS9034PCX PowerCap is

文件：114.12 Kbytes 頁(yè)數(shù)：5 Pages

MAXIM

美信

Y2K-Compliant, Nonvolatile Timekeeping RAMs

DESCRIPTION The DS1744 is a full-function, year-2000-compliant (Y2KC), real-time clock/calendar (RTC) and 32k x 8 NV SRAM. User access to all registers within the DS1744 is accomplished with a byte-wide interface as shown in Figure 1. The RTC information and control bits reside in the eight upper

文件：348.67 Kbytes 頁(yè)數(shù)：18 Pages

DALLAS