DS1302+ by Analog Devices

Trickle-Charge Timekeeping Chip

Status: Active
Series: DS1302
RoHS: Unknown
View Datasheet Manufacturer Site View Pricing & Stock

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.

Prices starting from US$1.66


Distributor Starting From Stock
Logo for Newark Electronics Newark Electronics US$3.98
2,131
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Logo for Farnell Contract Farnell Contract US$2.63
2,029
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Logo for element14 element14 US$2.81
2,029
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Logo for Transfer Multisort Elektronik Transfer Multisort Elektronik US$1.70
1,783
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Logo for Schukat Electronic Schukat Electronic US$1.74
200
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Logo for CoreStaff CoreStaff US$1.66
3
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Features

Completely Manages All Timekeeping Functions Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 2100 31 x 8 Battery-Backed General-Purpose RAM
Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 2100
31 x 8 Battery-Backed General-Purpose RAM
Simple Serial Port Interfaces to Most Microcontrollers Simple 3-Wire Interface TTL-Compatible (VCC = 5V) Single-Byte or Multiple-Byte (Burst Mode) Data Transfer for Read or Write of Clock or RAM Data
Simple 3-Wire Interface
TTL-Compatible (VCC = 5V)
Single-Byte or Multiple-Byte (Burst Mode) Data Transfer for Read or Write of Clock or RAM Data
Low Power Operation Extends Battery Backup Run Time 2.0V to 5.5V Full Operation Uses Less Than 300nA at 2.0V
2.0V to 5.5V Full Operation
Uses Less Than 300nA at 2.0V
8-Pin DIP and 8-Pin SO Minimizes Required Space
Optional Industrial Temperature Range: -40°C to +85°C Supports Operation in a Wide Range of Applications
Underwriters Laboratories® (UL) Recognized

Specifications

Interface 3-Wire
VSUPPLY (V) 2 to 5.5
Date/ Time Format (hh = sec/100) YY-MM-DD/ HH:MM:SS
Time Keeping Current (nA) (typ) 200
CL (pF) 6
Memory Type NV SRAM
Memory Size (Bytes) 31
Time of Day Alarms 0
Package/Pins PDIP/8SOIC (N)/8SOIC (W)/8
BudgetaryPrice (See Notes) 1.8


DS1302+ Semiconductors - ICs by Analog Devices

IC TRICKLE CHARGE RTC 1302 DIP8

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

Specifications

Date Format Day
Clock Format HH
Clock IC Type Timekeeper
Supply Voltage Min 2V
Supply Voltage Max 5.5V
Clock IC Case Style DIP
No. of Pins 8Pins
IC Interface Type 3 Wire Serial
Operating Temperature Min 0°C
Operating Temperature Max 70°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL -
SVHC No SVHC (15-Jan-2018)
Base Number 1302
Bus Type 3 wire
Device Marking DS1302+
IC Case Style DIP
IC Generic Number 1302
IC Temperature Range Commercial
Logic Function Number 1302
Memory Type RAM
No. of Outputs 1Outputs
Operating Temperature Range 0°C to +70°C
RTC Features Trickle Charger
Supply Voltage Range 2V to 5.5V
Termination Type Through Hole
Type RTC
Voltage Vcc Max 5V
Voltage Vcc Min 3V

Alternative Descriptions

Ic, Trickle Charge Rtc, 1302, Dip8 | Newark Electronics
IC, TRICKLE CHARGE RTC, 1302, DIP8 | Farnell Contract
IC: RTC circuit | Transfer Multisort Elektronik
RTC 3-Wire Trickle-Charge DIP8 | Schukat Electronic
CIRCUIT MINUTERIE DE CHARGE D'ENTRETIEN | RS

Frequently Asked Questions

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Is the DS1302+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for DS1302+ have stock available?

Authorised distributors including Newark Electronics, Farnell Contract, element14, Transfer Multisort Elektronik and Schukat Electronic have stock available or on a lead time for DS1302+ .

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