Overview
The PCF8583P/F5,112, produced by NXP USA Inc., is a clock and calendar chip designed for precise timekeeping and data storage. It is based on a 2048-bit static CMOS RAM, organized as 256 words by 8 bits. This chip integrates an on-chip 32.768 kHz oscillator circuit, a frequency divider, and a serial two-line bidirectional I2C-bus interface. The PCF8583P is suitable for various applications requiring accurate time and date management, along with additional RAM for general-purpose use.
Key Specifications
| Parameter | Value |
|---|---|
| RAM Organization | 256 words by 8 bits |
| Operating Supply Voltage | 2.5 V to 6 V |
| Clock Operating Supply Voltage | 1.0 V to 6.0 V at 0 °C to +70 °C |
| Interface Type | Serial, I2C |
| Operating Current (at fSCL = 0 Hz) | Max 50 μA |
| Data Retention Voltage | 1.0 V to 6.0 V |
| Minimum Operating Temperature | -40 °C |
| Maximum Operating Temperature | +85 °C |
| Package Types | DIP-8, SOT176-1, etc. |
Key Features
- I2C-bus interface for serial data transfer
- On-chip 32.768 kHz oscillator circuit for clock functions
- Frequency divider and control logic for various timing modes
- Power-On Reset (POR) circuit for reliable startup
- 240 x 8-bit low-voltage RAM for general-purpose use
- Alarm registers and free RAM locations configurable
- Automatic word address register increment after each data byte transfer
Applications
- Real-time clock and calendar functions in various electronic devices
- Data logging and storage in industrial and consumer electronics
- Alarm and timer functions in automation and control systems
- General-purpose RAM in microcontroller-based projects
Q & A
- What is the primary function of the PCF8583P/F5,112? The primary function is to provide a clock and calendar with additional RAM for general-purpose use.
- What type of interface does the PCF8583P use? It uses a serial two-line bidirectional I2C-bus interface.
- What is the operating supply voltage range for the PCF8583P? The operating supply voltage range is 2.5 V to 6 V.
- What is the maximum operating current at fSCL = 0 Hz? The maximum operating current is 50 μA.
- Can the PCF8583P be used in low-power applications? Yes, it is suitable for low-power applications due to its low operating current.
- What is the purpose of the on-chip 32.768 kHz oscillator circuit? The oscillator circuit is used for the clock and calendar functions.
- How much RAM does the PCF8583P provide? It provides 240 x 8-bit low-voltage RAM.
- Can the alarm registers be configured? Yes, the alarm registers can be programmed or used as free RAM locations.
- What is the temperature range for the PCF8583P? The operating temperature range is -40 °C to +85 °C.
- Is the PCF8583P still in production? No, it is no longer manufactured.
