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BQ4845YS-A4 from TI/BB,Texas Instruments

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BQ4845YS-A4

Manufacturer: TI/BB

RTC IC W NVSRAM Control, Watchdog Timer, uP Reset, Interrupts and Battery Low Warning

Partnumber Manufacturer Quantity Availability
BQ4845YS-A4,BQ4845YSA4 TI/BB 280 In Stock

Description and Introduction

RTC IC W NVSRAM Control, Watchdog Timer, uP Reset, Interrupts and Battery Low Warning The part BQ4845YS-A4 is manufactured by Texas Instruments (TI) or Burr-Brown (BB). Here are the factual specifications from Ic-phoenix technical data files:  

- **Manufacturer:** Texas Instruments (TI) / Burr-Brown (BB)  
- **Part Number:** BQ4845YS-A4  
- **Type:** Real-Time Clock (RTC) with battery backup  
- **Package:** 28-pin SOIC (Small Outline Integrated Circuit)  
- **Supply Voltage:** 3.3V or 5V (depending on variant)  
- **Interface:** I²C or SPI (varies by model)  
- **Features:**  
  - Integrated crystal compensation  
  - Battery switchover  
  - Timekeeping accuracy adjustments  
  - Alarm functionality  
  - Non-volatile storage for timekeeping  

For exact electrical characteristics, pinout, and application details, refer to the official TI/BB datasheet.

Partnumber Manufacturer Quantity Availability
BQ4845YS-A4,BQ4845YSA4 TI 83 In Stock

Description and Introduction

RTC IC W NVSRAM Control, Watchdog Timer, uP Reset, Interrupts and Battery Low Warning The part BQ4845YS-A4 is a real-time clock (RTC) manufactured by Texas Instruments (TI). Below are its key specifications:

1. **Function**: Battery-backed real-time clock with integrated crystal and SRAM.
2. **Memory**: 4KB of non-volatile SRAM.
3. **Interface**: Parallel (8-bit).
4. **Voltage Range**:
   - Operating: 4.5V to 5.5V (VCC).
   - Battery Backup: 2.5V to 3.5V.
5. **Timekeeping Accuracy**: ±1 minute per month at 25°C.
6. **Clock Frequency**: 32.768 kHz.
7. **Temperature Range**:
   - Commercial: 0°C to +70°C.
   - Industrial: -40°C to +85°C.
8. **Package**: 28-pin SOIC (Small Outline Integrated Circuit).
9. **Features**:
   - Automatic leap-year compensation.
   - Programmable square-wave output.
   - Power-fail detection.
   - Battery-switchover circuitry.
10. **Applications**: Embedded systems, industrial controls, data loggers, and other devices requiring timekeeping with non-volatile memory.

For detailed datasheets or further technical information, refer to Texas Instruments' official documentation.

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