DS1374U-33+

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DS1374U-33+

IC RTC BINARY CNT I2C 10-USOP

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Specifications

Supplier Rochester Electronics, LLC,Analog Devices Inc./Maxim Integrated
Package Tube,Tube
ProductStatus Obsolete
Type Binary Counter
Features Alarm, Square Wave Output, Trickle-Charger, Watchdog Timer
TimeFormat Binary
DateFormat Binary
Interface I²C, 2-Wire Serial
Voltage-Supply 2.97V ~ 5.5V
Voltage-SupplyBattery 1.3V ~ 5.5V
Current-Timekeeping(Max) 175µA @ 2.97V ~ 5.5V
OperatingTemperature -40°C ~ 85°C
MountingType Surface Mount
Package/Case 10-TFSOP, 10-MSOP (0.118, 3.00mm Width)

Overview

Description

DS1374U-33+ is a Dallas/Maxim real-time clock (RTC) with battery-backed non-volatile RAM, designed for 3.3 V operation. Key points:
- Real-time clock/calendar with a 32.768 kHz time base, timekeeping registers (seconds through year), and leap-year handling.
- I2C-compatible interface for easy MCU integration.
- Battery-backed backup input with automatic switchover to keep time and RAM contents during main power loss.
- User data preserved in non-volatile RAM; programmable square-wave output and alarm/interrupt options for events.
- 3.3 V variant indicated by the “U-33+” suffix, suitable for low-voltage, portable/embedded systems.
Common uses: data loggers, handheld devices, clocks, metering, and other embedded systems needing accurate timekeeping plus non-volatile storage.
Note: check the exact pinout, RAM size, and feature set in the datasheet for your package variant and I2C address.

Features

DS1374U-33+ is a 3.3V I2C real-time clock with nonvolatile RAM. Key features:
- I2C serial interface for easy microcontroller connection
- Real-time clock/calendar (seconds, minutes, hours, day, date, month, year; leap-year aware)
- Battery-backed operation with automatic power-fail switchover
- Nonvolatile RAM (32 bytes) for user data
- Alarm/interrupt capability with programmable outputs
- Programmable square-wave output
- Power-on reset and voltage watchdog
- Small package (U-series, 8-pin) suitable for compact designs
Note: device variants may offer additional options; consult the datasheet for exact timing ranges and alarm/SQW configurations.

Package

DS1374U-33+ is in an 8‑pin package, typically the SOIC-8 (Small Outline) version; a DIP-8 variant may also be available.

Pinout

8 pins. It is a 1-Wire real-time clock/calendar with nonvolatile RAM (RTC plus NV RAM) designed for 3.3V operation.

Manufacturer

Manufacturer: Dallas Semiconductor (DS). It was a semiconductor company that designed and manufactured integrated circuits (ICs), including real-time clocks, memory, and analog/digital ICs. Dallas Semiconductor was acquired by Maxim Integrated in 2001; Maxim is now part of Analog Devices.

Application

DS1374U-33+ is a real-time clock/calendar IC with battery-backup. Applications: time stamping/data logging; alarms and timers; battery-backed timekeeping in embedded systems; automotive instrumentation; industrial controllers and metering; consumer electronics (set-top boxes, handheld devices) and wearables; any system needing accurate, low-power timekeeping with backup.

Equivalent

Common equivalents for a 3.3 V I2C RTC with RAM/NVRAM like DS1374U-33+ include:
- ST M41T00 / M41T62
- NXP PCF8583 / PCF8563
- Microchip MCP7940N / MCP79410
Note: exact pinout, memory size, and voltage ranges differ. Verify interface, RAM size, timing outputs, and package before cross‑replacing.

Shipping

Shipping MethodsWe

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Shipping Fee Reference (DHL/FedEx):

DHL: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 2-5 business days.

FedEx: Shipping cost ranges from $25-$40 (0.5kg), with an estimated delivery time of 3-7 business days.

UPS: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 3-7 business days.

TNT: Shipping cost ranges from $25-$65 (0.5kg), with an estimated delivery time of 3-7 business days.

EMS: Shipping cost ranges from $30-$50 (0.5kg), with an estimated delivery time of 7-15 business days.

Registered Air Mail: Shipping cost is $2-$4 (0.1kg), with an estimated delivery time of 5-20 business days.

Payments

Payment Methods

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3. Wire Transfer

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