DS1672U-33

DS1672U-33 is a member of the Dallas/Maxim DS1672 family, a low-power, voltage-sensing device used for timekeeping and data storage. The “U-33” denotes a 3.3V operation variant. Typical features include a real-time clock/calendar, small nonvolatile storage (NV RAM), and a simple serial interface, with built-in power-fail detection and backup-supply support. It’s commonly used in embedded systems to keep accurate time across power cycles, stamp events, and store configuration data without a main power source. The part is designed for compact packages and low power consumption, suitable for battery-backed or supercap-backed operation.
If you want precise specifications (pins, timing, register map, voltage ranges, and backup behavior), please refer to the DS1672U-33 datasheet. I can summarize exact figures once you share the datasheet link or vendor.

Here are typical features of the DS1672U-33 (Dallas/Maxim RTC with 3.3V operation). Verify against your exact datasheet.
- Real-Time Clock/Calendar: tracks seconds, minutes, hours, day, date, month, year; options for alarm.
- Battery-Backed Timekeeping: maintains time when main power is off.
- 3.3 V operation: indicated by the -33 suffix.
- Serial Interface: I2C-compatible two-wire interface for register access.
- Clock Outputs: programmable square-wave or interrupt output for timing references.
- Alarm/Timer Functions: configurable alarm and timer capabilities.
- Non-Volatile Storage: small battery-backed RAM or EEPROM for data retention during power loss.
- Low Power Consumption: optimized for battery-backed operation.
- Wide Temperature Range: suitable for industrial applications (typical -40°C to +85°C).
- Package Options: compact packages (e.g., 8-pin) for space-constrained designs.
Note: exact memory size, register map, and feature set can vary by revision. Please consult the specific datasheet for DS1672U-33 to confirm precise specs.

DS1672U-33 comes in an 8-pin Small Outline IC package (SOIC).

- Pin count: 8 pins (SOIC-8/DIP-8)
- Function: Real-time clock/calendar (RTC) device with battery-backup for timekeeping in embedded systems (3.3V version).

Manufacturer: Dallas Semiconductor (the DS prefix), now part of Maxim Integrated, which in turn is part of Analog Devices.
Type of company: A semiconductor company that designs and manufactures integrated circuits (ICs), including memory and timing devices.

DS1672U-33 is a 3.3V Real-Time Clock/Timekeeper with nonvolatile memory. Applications include embedded systems needing accurate timekeeping, time-stamping, event logging, and watchdog timing. Suitable for industrial controllers, telecom equipment, automotive modules, medical devices, data loggers, and portable/backup-powered electronics where timekeeping must survive power loss.

DS1672U-33 is a Dallas/Maxim Timekeeper RAM (RTC with battery-backed NV RAM). Direct cross-refs are limited. Closest drop‑in equivalents: STMicroelectronics M48T58/M48T59 Timekeeper RAM series, and Dallas/Maxim DS12887 (RTC with NV RAM) family. For exact pinout, voltage, and capacity matching, consult the respective datasheets and verify before replacement.