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DS1554W-120IND+

Name: DS1554W-120IND+
Brand: MAXIM
SKU: JT24-DS1554W-120IND+
Price: 0.0001 USD
Availability: InStock
Rating: 5 (1 reviews)

256k Nonvolatile, Y2K-Compliant Timekeeping RAM

Manufacturer :	Maxim Integrated
Package/Case :	32-DIP Module (0.600, 15.24mm)
Product Categories :	Real Time Clock
Datasheet:	DS1554W-120IND+ Datasheet (PDF)
RoHs Status:	Rohs
In-stock:	302

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DS1554W-120IND+ Product Details

The DS1554W-120IND+ is a full-function, year 2000-compliant (Y2KC), real-time clock/calendar (RTC) with an RTC alarm, watchdog timer, power-on reset, battery monitor, and 32k x 8 nonvolatile static RAM. User access to all registers within the DS1554W-120IND+ is accomplished with a byte-wide interface as shown in Figure 1. The RTC registers contain century, year, month, date, day, hours, minutes, and seconds data in 24-hour binary-coded decimal (BCD) format. Corrections for day of month and leap year are made automatically. The RTC registers are double-buffered into an internal and external set. The user has direct access to the external set. Clock/calendar updates to the external set of registers can be disabled and enabled to allow the user to access static data. Assuming the internal oscillator is turned on, the internal set of registers is continuously updated; this occurs regardless of external registers settings to guarantee that accurate RTC information is always maintained.

The DS1554W-120IND+ has interrupt (active-low IRQ/FT) and reset (active-low RST) outputs which can be used to control CPU activity. The active-low IRQ/FT interrupt output can be used to generate an external interrupt when the RTC Register values match user programmed alarm values. The interrupt is always available while the device is powered from the system supply and can be programmed to occur when in the battery-backed state to serve as a system wakeup. Either the active-low IRQ/FT or active-low RST outputs can also be used as a CPU watchdog timer, CPU activity is monitored and an interrupt or reset output will be activated if the correct activity is not detected within programmed limits. The DS1554W-120IND+ power-on reset can be used to detect a system power down or failure and hold the CPU in a safe reset state until normal power returns and stabilizes; the active-low RST output is used for this function. The DS1554W-120IND+ also contains its own power-fail circuitry, which automatically deselects the device when the VCC supply enters an out of tolerance condition. This feature provides a high degree of data security during unpredictable system operation brought on by low VCC levels.

Feature

Integrated NV SRAM, Real-Time Clock (RTC), Crystal, Power-Fail Control Circuit, Lithium Energy Source
Clock Registers are Accessed Identically to the Static RAM; These Registers Reside in the 16 Top RAM Locations
Century Byte Register (i.e., Y2K Compliant)
Totally Nonvolatile with Over 10 Years of Operation in the Absence of Power
Precision Power-On Reset
Programmable Watchdog Timer and RTC Alarm
BCD-Coded 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% V_CC Power-Supply Tolerance
Lithium Energy Source is Electrically Disconnected to Retain Freshness Until Power is Applied for the First Time
Also Available in Industrial Temperature Range: -40°C to +85°C

DS1554W-120IND+ Block Diagram
(Picture: Diagram)

Technical Parameters

Function
Clock, Calendar, NV Timekeeping RAM, Watchdog Timekeeper
RTC Bus Interface
Parallel
Time Format
HH:MM:SS
RTC Memory Size
32768 B
Supply Voltage Max
3.63 V
Supply Voltage Min
2.97 V
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
Through Hole
Package / Case
eDIP
Packaging
Tube
Series
DS1554
Part # Aliases
90-1554W+12I

DS1554W-120IND+ Datasheet

DS1554 data sheet for guidance

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1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.

2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.

FAQ:

Q: How does Jotrin guarantee that DS1554W-120IND+ is the original manufacturer or agent of MAXIM?: We have a professional business development department to strictly test and verify the qualifications of MAXIM original manufacturers and agents. All MAXIM suppliers must pass the qualification review before they can publish their DS1554W-120IND+ devices; we pay more attention to the channels and quality of DS1554W-120IND+ products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of DS1554W-120IND+ chips? Including MAXIM original factory information, Real Time Clock application, DS1554W-120IND+ pictures?: You can use Jotrin's intelligent search engine, or filter by Timekeeping & Real-Time Clocks category, or find it through Maxim Integrated Information page.
Q: Are the MAXIM's DS1554W-120IND+ price and stock displayed on the platform accurate?: The MAXIM's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for DS1554W-120IND+, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
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Note: It may take up to 24 hours before carriers will display tracking information. In normal conditions, Express delivery needs 3-5 days, Registered Mail needs 25-60 days.
Q: What is the process for returns or replacement of DS1554W-120IND+?: All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the DS1554W120IND+ we delivered, we will accept the replacement or return of the DS1554W-120IND+ only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
(2)We are informed of the defect described above within 90 days after the delivery of DS1554W-120IND+.
(3)The DS1554W-120IND+ is unused and only in the original unpacked packaging.
Two processes to return the products:
(1)Inform us within 90 days
(2)Obtain Requesting Return Authorizations
More details about return electronic components please see our Return & Change Policy.
Q: How to contact us and get support, such as DS1554W-120IND+ datasheet pdf, DS1554 pin diagram?: Need any After-Sales service, please feel free contact us: sales@jotrin.com

Maxim Integrated

Maxim Integrated Products is a global range of linearity, mixed-signal integrated circuits (IC) design, R & D and manufacturing leader, has designed, developed, and manufactured analog, mixed-signal, high-frequency, and digital circuits that enable all four of these key interactions....

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