Изображения являются только для ссылки
Спецификации
| Атрибут | Ценность |
| Package | Tape & Reel (TR),Cut Tape (CT) |
| ProductStatus | Active |
| Type | Clock/Calendar |
| Features | Alarm, Leap Year |
| TimeFormat | HH:MM:SS (12/24 hr) |
| DateFormat | YY-MM-DD-dd |
| Interface | I²C, 2-Wire Serial |
| Voltage-Supply | 1.3V ~ 5.5V |
| Current-Timekeeping(Max) | 0.93µA ~ 1.1µA @ 3V ~ 5V |
| OperatingTemperature | -40°C ~ 85°C |
| MountingType | Surface Mount |
| Package/Case | 8-TSSOP (0.173, 4.40mm Width) |
| Voltage-SupplyBattery | 1.3V ~ 5.5V |
| MemorySize | 31B |
Обзор
Description
The DS1338U-33+ is a low-power, I²C real-time clock (RTC) with a built-in temperature-compensated crystal oscillator (TCXO) and 56-byte NV RAM. It maintains accurate timekeeping with minimal power consumption, making it ideal for battery-backed applications.
Key Features:
- I²C Interface: Supports standard (100kHz) and fast (400kHz) modes.
- Integrated TCXO: Ensures high timekeeping accuracy (±2ppm from 0°C to +40°C).
- Low Power: Operates at 3.3V, with ultra-low standby current.
- 56-Byte NV RAM: For data storage during power loss.
- Alarms & Interrupts: Two programmable time-of-day alarms.
- Battery Backup: Supports seamless switchover to backup power.
Applications: Embedded systems, IoT devices, data loggers, and consumer electronics requiring precise timekeeping.
The DS1338U-33+ is a compact, reliable solution for maintaining accurate time in low-power designs.
Key Features:
- I²C Interface: Supports standard (100kHz) and fast (400kHz) modes.
- Integrated TCXO: Ensures high timekeeping accuracy (±2ppm from 0°C to +40°C).
- Low Power: Operates at 3.3V, with ultra-low standby current.
- 56-Byte NV RAM: For data storage during power loss.
- Alarms & Interrupts: Two programmable time-of-day alarms.
- Battery Backup: Supports seamless switchover to backup power.
Applications: Embedded systems, IoT devices, data loggers, and consumer electronics requiring precise timekeeping.
The DS1338U-33+ is a compact, reliable solution for maintaining accurate time in low-power designs.
Equivalent
Equivalent products to the DS1338U-33+ (I²C RTC with battery backup) include:
- DS1337U-33+ (similar specs, no SRAM)
- DS3231 (higher accuracy, temperature-compensated)
- MCP7940N (Microchip, I²C, battery backup)
- PCF8523 (NXP, low-power I²C RTC)
- RV-8803-C7 (Micro Crystal, ultra-low power).
Check pinout and features for compatibility.
- DS1337U-33+ (similar specs, no SRAM)
- DS3231 (higher accuracy, temperature-compensated)
- MCP7940N (Microchip, I²C, battery backup)
- PCF8523 (NXP, low-power I²C RTC)
- RV-8803-C7 (Micro Crystal, ultra-low power).
Check pinout and features for compatibility.
Features
The DS1338U-33+ is a low-power I²C real-time clock (RTC) with key features:
- I²C Interface: Supports standard (100kHz) and fast (400kHz) modes.
- Timekeeping: Tracks seconds, minutes, hours, day, date, month, and year (with leap-year compensation up to 2100).
- Low Power: Operates at 1.8V to 3.3V, with ultra-low standby current.
- Battery Backup: Integrated for continuous timekeeping during power loss.
- Alarms: Two programmable time-of-day alarms.
- Square-Wave Output: Configurable frequencies (32.768kHz, 1Hz, etc.).
- Small Package: 8-pin µSOP for space-constrained designs.
- Temperature Range: Industrial (-40°C to +85°C).
Ideal for embedded systems requiring precise timekeeping with minimal power.
- I²C Interface: Supports standard (100kHz) and fast (400kHz) modes.
- Timekeeping: Tracks seconds, minutes, hours, day, date, month, and year (with leap-year compensation up to 2100).
- Low Power: Operates at 1.8V to 3.3V, with ultra-low standby current.
- Battery Backup: Integrated for continuous timekeeping during power loss.
- Alarms: Two programmable time-of-day alarms.
- Square-Wave Output: Configurable frequencies (32.768kHz, 1Hz, etc.).
- Small Package: 8-pin µSOP for space-constrained designs.
- Temperature Range: Industrial (-40°C to +85°C).
Ideal for embedded systems requiring precise timekeeping with minimal power.
Pinout
The DS1338U-33+ is a 3.3V I²C real-time clock (RTC) with battery backup and alarm functions.
- Pin Count: 8-pin (SOIC package)
- Key Functions:
- VCC (Pin 8): 3.3V power supply
- GND (Pin 4): Ground
- SCL (Pin 6): I²C serial clock input
- SDA (Pin 5): I²C bidirectional data
- SQW/INTB (Pin 7): Programmable square wave output or interrupt
- VBAT (Pin 3): Backup battery input (1.8V–3.3V)
- X1, X2 (Pins 1, 2): 32.768kHz crystal connections
Features:
- I²C interface (up to 400kHz)
- Timekeeping with seconds, minutes, hours, day, date, month, and year
- Two time-of-day alarms
- Battery switchover & low-power operation
Applications: Embedded systems, data logging, and power-sensitive designs.
- Pin Count: 8-pin (SOIC package)
- Key Functions:
- VCC (Pin 8): 3.3V power supply
- GND (Pin 4): Ground
- SCL (Pin 6): I²C serial clock input
- SDA (Pin 5): I²C bidirectional data
- SQW/INTB (Pin 7): Programmable square wave output or interrupt
- VBAT (Pin 3): Backup battery input (1.8V–3.3V)
- X1, X2 (Pins 1, 2): 32.768kHz crystal connections
Features:
- I²C interface (up to 400kHz)
- Timekeeping with seconds, minutes, hours, day, date, month, and year
- Two time-of-day alarms
- Battery switchover & low-power operation
Applications: Embedded systems, data logging, and power-sensitive designs.
Package
The DS1338U-33+ comes in an 8-pin µSOP package. This small outline package is surface-mount compatible, compact, and suitable for space-constrained applications. It operates at 3.3V and integrates an I²C real-time clock with battery backup. The µSOP (MSOP) package ensures efficient PCB space utilization while maintaining reliable performance.
