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데이터 시트

전체 데이터 시트 (PDF, 600kB) English 다운로드

제품 설명

The DS1689/DS1693 is a real time clock (RTC) designed as a successor to the industry standard DS1285, DS1385, DS1485, and DS1585 PC real time clocks. This device provides the industry standard DS1285 clock function with the new feature of either +3.0 or +5.0V operation and automatic backup and write protection to an external SRAM. The DS1689 also incorporates a number of enhanced features including a silicon serial number, power-on/off control circuitry, and 114 bytes of user NVSRAM, power-on elapsed timer, and power cycle counter. Each DS1689/DS1693 is individually manufactured with a unique 64-bit serial number as well as an additional 64-bit customer specific ROM or serial number. The serial number is programmed and tested at Dallas to insure that no two devices are a like. The serial number can be used to electronically identify a system for purposes such as establishment of a network node address or for maintenance tracking. Blocks of available numbers from Dallas Semiconductor can be reserved by the customer. The serialized RTCs also incorporate power control circuitry, which allows the system to be powered on via an external stimulus, such as a keyboard or by a time and date (wake-up) alarm. The PWR output pin can be triggered by one or either of these events, and can be used to turn on an external power supply. The PWR pin is under software control, so that when a task is complete, the system power can then be shut down. The DS1689/DS1693 incorporates a power-on elapsed time counter, a power-on cycle counter, and a battery powered continuous counter. These three counters provide valuable information for maintenance and warranty requirements. Automatic backup and write protection for an external SRAM is provided through the VCCO and CEO pins. The lithium energy source used to permanently power the real time clock is also used to retain RAM data in the absence of VCC power through the VCCO pin. The chip enable output to RAM (CEO) is controlled during power transients to prevent data corruption. The DS1689 is a clock/calendar chip with the features described above. An external crystal and battery are the only components required to maintain time-of-day and memory status in the absence of power. The DS1693 incorporates the DS1689 chip, a 32.768 kHz crystal, and a lithium battery in a complete, self-contained timekeeping module. The entire unit is fully tested at Dallas Semiconductor such that a minimum of 10 years of timekeeping and data retention in the absence of VCC is guaranteed.

주요기능

Incorporates industry standard DS1287 PC clock plus enhanced features: +3- or +5V operation 64-bit silicon serial number 64-bit customer specific ROM or additional serial number available Power control circuitry supports system power-on from date/time alarm or key closure Automatic battery backup and write protection to external SRAM Crystal select bit allows RTC to operate with 6pF or 12.5pF crystal 114 bytes user NV RAM Auxiliary battery input RAM clear input Century register 32kHz output for power management 32-bit VCC powered elapsed time counter 32-bit VBAT powered elapsed time counter 16-bit power cycle counter Compatible with existing BIOS for original DS1287 functions Available as IC (DS1689) or standalone module with embedded battery and crystal (DS1693) IC is available in industrial temperature version Timekeeping algorithm includes leap year compensation valid up to 2100

애플리케이션 노트

애플리케이션 노트 58: Crystal Considerations with Dallas Real-Time Clocks (RTCs) - DS1689 애플리케이션 노트 499: Using the Multiplex Bus RTC Extended Features - DS1689, DS1693 애플리케이션 노트 504: Design Considerations for Dallas Semiconductor Real-Time Clocks - DS1689, DS1693 애플리케이션 노트 505: Lithium Coin-Cell Batteries: Predicting an Application Lifetime - DS1689 애플리케이션 노트 701: Using the DS32kHz with Dallas Real-Time Clocks - DS1689 애플리케이션 노트 1145: Interface a Multiplexed-Bus Real-Time Clock to a µP With Separate Address and Data Buses - DS1689, DS1693 애플리케이션 노트 3778: Problems and Solutions for Adjusting to Changes in Daylight Saving Time - DS1689, DS1693

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REAL-TIME CLOCKS (PDF) NONVOLATILE MEMORY (PDF)

신뢰성 보고서

신뢰성 보고서: DS1689.pdf DS1693.pdf

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참고: 부품을 구매하기 위한 기타 옵션 및 링크는 http://korea.maxim-ic.com/sales에 실려 있습니다. 필요한 것을 찾지 못하셨나요? Maxim 애플리케이션 엔지니어에게 문의하십시오. 부품을 찾는데 필요한 전문가의 도움이 보통 업무일 1일 이내에 제공됩니다. 부품번호 suffix: T 또는 T&R = 테잎 앤 릴, + = RoHS/lead-free, # = RoHS/lead 예외.추가 정보:전체 데이터 시트또는 부품번호 규칙 * 일부 패키지는 크기 편차(variation)를 가지며 이 값은 도면 상에 제시되어 있습니다. “패키지 코드/편차”는 해당 제품이 사용하고 있는 편차를 보여줍니다. 부품번호 suffix에 "+", "#", "-"는 RoHS 준수 상태를 나타냅니다. 패키지 도면에 suffix 문자는 다를 수 있습니다.
소자: 1-11 / 11
DS1689	참고	무료 샘플	구매	패키지: 타입 핀 풋프린트   도면 코드/편차 *	온도	RoHS/Lead-Free? 재료 분석
DS1689	114 x 8 RAM			PDIP,28 핀, 도면: 21-0044B (PDF) 패키지 코드/편차 이용: P28-6*	0°C ~ +70°C	RoHS/Lead-Free: 아니오 재료 분석
DS1689S	114 x 8 RAM			SOIC,28 핀, Dwg: 56-G2009-028 패키지 코드/편차 이용: F28-3*	0°C ~ +70°C	RoHS/Lead-Free: 아니오 재료 분석
DS1689S/T&R				SOIC,28 핀, Dwg: 56-G2009-028 패키지 코드/편차 이용: F28-3*	0°C ~ +70°C	RoHS/Lead-Free: 아니오 재료 분석
DS1689S+				SOIC,28 핀, Dwg: 56-G2009-028 패키지 코드/편차 이용: F28+2*	0°C ~ +70°C	RoHS/Lead-Free: Lead-Free 재료 분석
DS1689S+T&R				SOIC,28 핀, Dwg: 56-G2009-028 패키지 코드/편차 이용: F28+2*	0°C ~ +70°C	RoHS/Lead-Free: Lead-Free 재료 분석
DS1689SN				SOIC,28 핀, Dwg: 56-G2009-028 패키지 코드/편차 이용: F28-3*	-40°C ~ +85°C	RoHS/Lead-Free: 아니오 재료 분석
DS1689SN/T&R				SOIC,28 핀, Dwg: 56-G2009-028 패키지 코드/편차 이용: F28-3*	-40°C ~ +85°C	RoHS/Lead-Free: 아니오 재료 분석
DS1689SN+T&R				SOIC,28 핀, Dwg: 56-G2009-028 패키지 코드/편차 이용: F28+2*	-40°C ~ +85°C	RoHS/Lead-Free: Lead-Free 재료 분석
DS1689SN+				SOIC,28 핀, Dwg: 56-G2009-028 패키지 코드/편차 이용: F28+2*	-40°C ~ +85°C	RoHS/Lead-Free: Lead-Free 재료 분석
DS1693	참고	무료 샘플	구매	패키지: 타입 핀 풋프린트   도면 코드/편차 *	온도	RoHS/Lead-Free? 재료 분석
DS1693	114 x 8 RAM			MOD,28 핀, Dwg: 56-G0001-001 패키지 코드/편차 이용: MDP28-2*	0°C ~ +70°C	RoHS/Lead-Free: 아니오 재료 분석
DS1693+				MOD,28 핀, Dwg: 56-G0001-001 패키지 코드/편차 이용: MDP28+2*	0°C ~ +70°C	RoHS/Lead-Free: Lead-Free 재료 분석

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