DS1747W-120+ by Analog Devices

Y2K-Compliant, Nonvolatile Timekeeping RAMs

Status: Active
Series: DS1747, DS1747P
RoHS: Unknown
View Datasheet Manufacturer Site View Pricing & Stock

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 binary-coded decimal (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.

Prices starting from US$39.99


Distributor Starting From Stock
Logo for Newark Electronics Newark Electronics US$42.68
-
Buy Now
Logo for element14 element14 US$39.99
-
Buy Now
View Full Pricing & Stock Comparison

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
Standard JEDEC Byte-Wide 512k x 8 Static RAM Pinout
PowerCap Module Board Only: Surface-Mountable Package for Direct Connection to PowerCap Containing Battery and Crystal Replaceable Battery (PowerCap) Power-On Reset Output Pin-for-Pin Compatible with Other Densities of DS174xP Timekeeping RAM
Surface-Mountable Package for Direct Connection 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°C to +85°C

Specifications

Interface Bytewide
VSUPPLY (V) 5
Date/ Time Format (hh = sec/100) YYYY-MM-DD/ HH:MM:SS
Memory Type NV SRAM
Memory Size (Bytes) 512K
Time of Day Alarms 0
Package/Pins MOD/32PWRCP/34
BudgetaryPrice (See Notes) 30.68


DS1747W-120+ Semiconductors - ICs by Analog Devices

RTC W/ NV SRAM 512KB EDIP-32

Status: Unknown
Series: -
RoHS: Unknown
View Datasheet Manufacturer Site View Pricing & Stock

Specifications

Date Format Day
Clock Format HH
Clock IC Type RTC
Supply Voltage Min 2.97V
Supply Voltage Max 3.63V
Clock IC Case Style EDIP
No. of Pins 32Pins
IC Interface Type Bytewide
Operating Temperature Min 0°C
Operating Temperature Max 70°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC 1 2-dimethoxyethane ethylene glycol dimethyl ether (EGDME) (15-Jan-2018)

Alternative Descriptions

Rtc W/ Nv Sram, 512Kb, Edip-32 | Newark Electronics
RTC W/ NV SRAM, 512KB, EDIP-32 | element14

Frequently Asked Questions

Where can I find additional details, specifications and documents for a DS1747W-120+ ?

Additional datasheets, footprints and schematics for DS1747W-120+ are listed on our Part Details page. You can also find images and similar parts to DS1747W-120+ on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for DS1747W-120+ on our Product Comparison page. Access via the 'View Pricing & Stock' button to view DS1747W-120+ price breaks, MOQs, lead times, inventory and SKUs from distributors.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the DS1747W-120+ you can contact the distributor directly for product support, shipping queries etc.

Is the DS1747W-120+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for DS1747W-120+ have stock available?

Authorised distributors including Newark Electronics, element14 and Farnell have stock available or on a lead time for DS1747W-120+ .

How do I check stock and lead times for all distributors?

Stock availability and lead times will be displayed for DS1747W-120+ often in real-time on the comparison pages.

What if I can't find stock of DS1747W-120+ ?

You can fill out our help required form which you can use to request a quote for DS1747W-120+ from some of our verified obsolescence suppliers. Alternatively, contact us via our web chat in the bottom left of your screen and one of our team will try to help.

We use cookies to improve your experience. See our privacy policy.
Okay