Buy(0)
Inquiry(0)
Dear customers, due to the implementation of the GDPR policy in Europe, UTSOURCE has also made adjustment accordingly to meet the policy requirements. Please read the new privacy policy carefully and this window will no longer pop up after you accept it.
Delivery Address
+ Add Address
The new shipping address
* Please fill in the cell phone number correctly to make sure that you can receive the tracking info in time.
Country Code
Favorite
Utsource certified used parts
Utsource certified used parts provide the following guarantees:
1. Utsource will inspect the goods, including appearance inspection (no serious damage to the appearance), select qualified and honest suppliers, and ensure 98% qualification rate.
2. Some parts are tested by machine.
3. Utsource certified parts can be returned and refunded unconditionally within 60 days.
Description
IC RTC CLK/CALENDAR PAR 28-EDIP
All product names, trademarks, brands and logos used on this site are the property of their respective owners. The depiction, description or sale of products featuring these names, trademarks, brands and logos is for identification purposes only and is not intended to indicate any affiliation with or authorization by any rights holder.
FEATURES
● Integrated NV SRAM, Real-Time Clock, 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..
● Totally Nonvolatile with Over 10 Years of Operation in the Absence of Power
● BCD-Coded Year, Month, Date, Day, Hours, Minutes, and Seconds with Leap Year Compensation Valid Up to 2100
● Power-Fail Write Protection Allows for ±10% VCC Power Supply Tolerance
● DS1644 Only (DIP Module)
Upward Compatible with the DS1643 Timekeeping RAM to Achieve Higher RAM Density
Standard JEDEC Bytewide 32k x 8 Static RAM Pinout
● DS1644P Only (PowerCap Module Board) Surface Mountable Package for Direct Connection to PowerCap Containing Battery and crystal
Replaceable Battery (PowerCap) Power-Fail Output
Pin-for-Pin Compatible with Other Densities of DS164XP Timekeeping RAM
Underwriters Laboratory (UL) Recognized
DESCRIPTION
The DS1644 is a 32k x 8 nonvolatile static RAM with a full function real time clock, which are both accessible in a byte-wide format.The nonvolatile timekeeping RAM is functionally equivalent to any JEDEC standard 32k x 8 SRAM. The device can also be easily substituted for ROM, EPROM and EEPROM, providing read/write nonvolatility and the addition of the real time clock function. The real time clock information resides in the eight uppermost RAM locations. The RTC registers contain year, month, date, day, hours,minutes, and seconds data in 24-hour BCD format. Corrections for the day of the 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 DS1644 also contains its own power-fail circuitry, which 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.
Preview of the first 3 pages of the data sheet
Some Part number from the same manufacture
Same catergory
282 buyer reviews from Canada
Mike
Length of registration:3 years
item as described.product arrived fast. thanks
0
0
Reply0
12/08/2022
Paul
Length of registration:3 years
Everything is fine! Good luck to all!
0
0
Reply0
11/18/2022
FRANCOIS
Length of registration:3 years
i bought a few from this seller and they have the best price and quality!
0
0
Reply0
10/24/2022
Andre
Length of registration:3 years
Good Goods. Fast forward. I all happy
0
0
Reply0
10/12/2022
alain
Length of registration:14 years
Very disappointed at the delivery speed. I paid good money for shipping but only to wait two weeks for the parcel to arrive.
0
0
Reply0
09/27/2022
Ramzi Fakhoury
Length of registration:9 years
Very satisfied with
0
0
Reply0
10/23/2017
Gilles Francoeur
Length of registration:6 years
Comme la photo montré
0
0
Reply0
04/11/2017
John
Length of registration:6 years
Excellent Thanks
0
0
Reply0
04/02/2017
louis fortin
Length of registration:7 years
super
0
0
Reply0
12/16/2016
Jim Galway
Length of registration:1 years
Excellent service as always!
0
0
Reply0
10/12/2016
European payment method
Asia payment method
America payment method
International payment method
Latest shipping video More
Order
Payment
Shipping
Gift Coupon/Plus service
Returning
Returns are normally accepted when completed within 60 days from the date of the parcel delivered.
Defective ( Please provide a third party quality report of nonconforming products)
Return Freight charges must be prepaid; we will not accept COD shipments.
Warranty
All UTSOURCE purchases have a 60 days money back return policy, plus a 90 days UTSOURCE warranty against any manufacturing defects.This warranty shall not apply to any item where defects have been caused by improper customer assembly, failure by customer to follow instructions, product modification, negligent or improper operation.
DS1644-120+
DS1644-120+ has several brands around the world that may have alternate names for DS1644-120+ due to regional differences or acquisition. DS1644-120+ may also be known as the following names:
BUYING OPTIONS
Stock Status: 5000
Minimum: 1
Total Price:
Unit Price:11.38104
UTSOURCE
Country:
United States
Express:(FEDEX, UPS, DHL, TNT)Free shipping on first 0.5kg for orders over C$265.13,Overweight will be charged separately
JudyCustomer Manager
sales@utsource.com
(888) 766 5577
+86 15302769052
+1 (312)899-4831
(whatsapp only)
Your dedicated customer service, providing you the best service at any time.
3 sellers Choices
Stop production experts, we can provide a large number of electronic components that have been stopped production and are difficult to find, to facilitate the maintenance company
Reply to
submit