DS1302 - Maxim Integrated

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

DS1302
Manufacturer

Maxim Integrated
ChipWorker Part#

CW6303478
Category

Real Time Clock IC
Package

PDIP-8
Description

Real Time Clock Serial 31Byte Clock/Calendar/Trickle Charger/NV Timekeeping RAM 8Pin PDIP N
Documentation

Datasheet

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DS1302 Specifications

Attribute	Attribute Value

Part Number	DS1302
Manufacturer	Maxim Integrated
ChipWorker Part#	CW6303478
Category	Real Time Clock IC
Documentation	Datasheet
Mounting Style	Through Hole
Number of Pins	8 Pin
Case/Package	PDIP-8
Supply Voltage (DC)	2.00V (min)
Number of Outputs	1 Output
Memory Size	31 B
Supply Voltage	2V ~ 5.5V
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Operating Temperature	0℃ ~ 70℃
Product Lifecycle Status	Unknown
Packaging	Tube
RoHS	Non-Compliant
Lead-Free Status	Contains Lead

Product Description

Description
The DS1302 trickle-charge timekeeping chip contains a real-time clock/calendar and 31 bytes of static RAM. It communicates with a microprocessor via a simple serial interface. The real-time clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with an AM/PM indicator.
Interfacing the DS1302 with a microprocessor is simplified by using synchronous serial communication. Only three wires are required to communicate with the clock/RAM: CE, I/O (data line), and SCLK (serial clock). Data can be transferred to and from the clock/RAM 1 byte at a time or in a burst of up to 31 bytes. The DS1302 is designed to operate on very low power and retain data and clock information on less than 1µW.
The DS1302 is the successor to the DS1202. In addition to the basic timekeeping functions of the DS1202, the DS1302 has the additional features of dual power pins for primary and backup power supplies, programmable trickle charger for VCC1, and seven additional bytes of scratchpad memory.

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