DS1643-100+

Name: DS1643-100+
Brand: Maxim Integrated
Rating: 4.5 (10 reviews)
Author: Lisleapex

Maxim DS1643-100 NVRAM

7,302 Effective Inventory

DS1643-100+

Effective Inventory7,302

Maxim DS1643-100 NVRAM

Manufacturer Part # : DS1643-100+
Package/Case: EDIP-28
Part Status : OBSOLETE
Brand: Maxim Integrated
Product Categories : Real Time Clocks
Series : DS1643

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DS1643-100+ DataSheet

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DS1643-100+ Details

The DS1643-100+ is a robust real-time clock (RTC) from Analog Devices, designed for reliable timekeeping in battery-powered systems. This device features 64K bit (8K x 8) configuration, automatic power-fail chip deselect and write protection, and top or bottom battery installation. It is housed in an 28-DIP module package, making it suitable for compact circuit designs.

Pinout

1 (VCC): Positive Power Supply
2 (GND): Ground
3 (A): Non-inverting Clock Input/Driver Output
4 (B): Inverting Clock Input/Driver Output
5 (SCL): Serial Clock Input
6 (SDA): Serial Data Input/Output
7 (RST): Reset Input
8 (INT): Interrupt Output

(Tip: For detailed pinout information, please refer to the corresponding datasheet.)

Key Features

Non-volatile Memory: The DS1643-100+ features 64K bit (8K x 8) configuration, allowing for reliable timekeeping even in the absence of power.
Automatic Power-fail Chip Deselect and Write Protection: This feature ensures that the device is protected from accidental writes or changes during power failures.
Top or Bottom Battery Installation: The DS1643-100+ can be installed with the battery either on top or bottom, providing flexibility in system design.

Applications

The DS1643-100+ is suitable for a wide range of applications where reliable timekeeping and low power consumption are essential. Some examples include:

Battery-powered systems, such as watches or calculators.
Industrial control systems, where accurate timing is critical.
Medical devices, where reliable timekeeping is important for patient safety and treatment.

Where to Use

The DS1643-100+ can be used in a variety of applications where reliable timekeeping and low power consumption are essential. Some examples include:

Battery-powered systems, such as watches or calculators.
Industrial control systems, where accurate timing is critical.
Medical devices, where reliable timekeeping is important for patient safety and treatment.

How to Use

To use the DS1643-100+, follow these steps:

Install the device in your system, ensuring proper power supply connections to VCC and GND.
Configure the device using the serial interface (SCL and SDA pins) or parallel interface (A and B pins).
Use the RST pin to reset the device and initialize its internal clock.

Application Circuit

The application circuit diagram for the DS1643-100+ illustrates how to connect the device to a system. It includes connections for power supply, ground, and serial interface (SCL and SDA pins), ensuring proper operation and reliable timekeeping.

(Tip: For detailed circuit diagram connections and usage guide, refer to the datasheet.)

Equivalents

DS1642-100+: A similar RTC from Analog Devices offering comparable features and performance.
MAX3110: An alternative RTC from Maxim Integrated with equivalent functionality.

Complementary

The DS1643-100+ can be complemented by other Analog Devices products, such as the AD9851, which offers additional features like temperature compensation and alarm functions. When selecting complementary devices, ensure that their features and specifications align with your specific application requirements for optimal performance and compatibility.

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Product Category !	Real Time Clock	RoHS	Details
Mounting Style	Through Hole	Package / Case	EDIP-28
RTC Bus Interface	Parallel	Time Format !	HH:MM:SS
RTC Memory Size	8 kB	Supply Voltage - Max	5.5 V
Supply Voltage - Min	4.5 V	Minimum Operating Temperature	0 C
Maximum Operating Temperature !	+ 70 C	Brand	Analog Devices / Maxim Integrated
Function	Calendar, Clock, NV Timekeeping RAM	Product Type !	Real Time Clocks
Series	DS1643	Factory Pack Quantity	12
Subcategory	Clock & Timer ICs	Part # Aliases	DS1643 90-16430+100

Datasheet PDF

Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.

Preliminary Specification DS1643-100+ PDF Download

FAQs

What is DS1643-100+?

The DS1643-100+ is a non-volatile static RAM (NVSRAM) module manufactured by Maxim Integrated. It combines the features of a static RAM with non-volatile storage, providing data retention even when power is removed. This makes it suitable for applications requiring data backup and storage in the event of power loss.

How Does DS1643-100+ Work?

The DS1643-100+ works by utilizing a combination of volatile static RAM and non-volatile EEPROM (Electrically Erasable Programmable Read-Only Memory). It allows data to be read and written like a standard SRAM, while maintaining the ability to store data without a constant power source. When the module is powered, it operates as a regular fast SRAM, and when power is removed, the integral lithium energy source retains the data.

How Many Pins does DS1643-100+ have and What are the Functions of the Pinout Configuration?

The DS1643-100+ is housed in a 28-pin EDIP (Extended Dual-In-Line Package) module. The pinout configuration includes:

VCC: Positive power supply pin.
GND: Ground pin.
CE, OE, WE: Chip enable, output enable, and write enable control pins.
ADDR (A0-A16), DATA (DQ0-DQ14): Address and data input/output pins.
VBAT: Backup battery input pin.
NC: No-connect pin.

What are the Pros and Cons of DS1643-100+?

Pros:

Non-Volatile Data Storage: Retains data without power, providing data backup functionality.
Fast Access Time: Operates as a fast SRAM with rapid data access and storage.
Simple Integration: Compatible with standard SRAM interfaces, making it easy to integrate into existing designs.
Reliable Data Retention: Ensures long-term data storage and backup in critical applications.

Cons:

Complex Control: Requires careful consideration of control signals for proper operation and data retention.
Cost: NVSRAM modules may have a higher cost compared to standard SRAM due to non-volatile memory components.

Are There Any Equivalents/Alternatives to DS1643-100+ for Recommendation?

Alternatives to the DS1643-100+ include the FM18W08 from Fujitsu and the CY14B101P from Cypress Semiconductor, which are also non-volatile SRAM modules with similar functionality.