DS1746WP+120, DS1746WR, DS1747 Selling Leads, Datasheet
MFG:DALLAS Package Cooled:PLCC D/C:06+
DS1746WP+120, DS1746WR, DS1747 Datasheet download
Part Number: DS1746WP+120
MFG: DALLAS
Package Cooled: PLCC
D/C: 06+
DS1746WP+120, DS1746WR, DS1747
- Table of contents:
Info of DS1746WP+120
Info of DS1746WR
Info of DS1747
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About DS1
PDF/DataSheet Download
Datasheet: DS1
File Size: 68288 KB
Manufacturer: Linear
Download : Click here to Download
About DS1
PDF/DataSheet Download
Datasheet: DS1
File Size: 68288 KB
Manufacturer: Linear
Download : Click here to Download
About DS1747
PDF/DataSheet Download
Datasheet: DS1747
File Size: 252181 KB
Manufacturer: Dallas
Download : Click here to Download
DS1747 General Description
The DS1747 is a full-function, year-2000-compliant (Y2KC), real-time clock/calendar (RTC) and 512k x 8 nonvolatile static RAM. User access to all registers within the DS1747 is accomplished with a byte-wide interface as shown in Figure 1. The RTC information and control bits reside in the eight uppermost RAM locations. The RTC registers contain century, year, month, date, day, hours, minutes, and seconds data in 24-hour BCD format. Corrections for the date of each month and leap year are made automatically. The RTC clock registers are double buffered to avoid access of incorrect data that can occur during clock update cycles. The double-buffered system also prevents time loss as the timekeeping countdown continues unabated by access to time register data. The DS1747 also contains its own power-fail circuitry that deselects the device when the VCC supply is in an out-of-tolerance condition. This feature prevents loss of data from unpredictable system operation brought on by low VCC as errant access and update cycles are avoided.
DS1747 Features
· Integrated NV SRAM, Real-Time Clock (RTC), Crystal, Power-Fail Control Circuit, and Lithium Energy Source
· Clock Registers are Accessed Identically to the Static RAM. These Registers are Resident in the Eight Top RAM Locations.
· Century Byte Register (Y2K Compliant)
· Totally Nonvolatile with Over 10 Years of Operation in the Absence of Power
· BCD-Coded Century, Year, Month, Date, Day, Hours, Minutes, and Seconds with Automatic Leap-Year Compensation Valid Up to the Year 2100
· Battery Voltage-Level Indicator Flag
· Power-Fail Write Protection Allows for ±10% VCC Power-Supply Tolerance
· Lithium Energy Source is Electrically Disconnected to Retain Freshness Until Power is Applied for the First Time
· DIP Module Only: Standard JEDEC Byte-Wide 512k x 8 Static RAM Pinout
· PowerCap(R) Module Board Only: Surface-Mountable Package for Direct onnection to PowerCap Containing Battery and Crystal Replaceable Battery (PowerCap) Power-On Reset Output Pin-for-Pin Compatible with Other Densities of DS174xP Timekeeping RAM
· Also Available in Industrial Temperature Range: -40℃ to +85℃
DS1747 Connection Diagram
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