Overview
The NXP PCF8583T/5,518 is a versatile clock and calendar chip designed for a wide range of applications requiring precise timekeeping and additional memory. This device is part of NXP Semiconductors' portfolio and is known for its reliability and low power consumption. The PCF8583T/5,518 integrates a 2048-bit static CMOS RAM, organized as 256 words by 8 bits, and features a built-in 32.768 kHz oscillator circuit, making it suitable for various timing and calendar functions.
Key Specifications
| Specification | Value |
|---|---|
| Package Type | SO8 (Small Outline 8-pin) |
| Supply Voltage | 1.0 V to 6.0 V |
| Operating Temperature | -40°C to +85°C |
| RAM Capacity | 2048 bits (256 words x 8 bits) |
| Oscillator Frequency | 32.768 kHz |
| I2C-Bus Interface | Two-line bidirectional |
| Address Input | A0 pin for hardware address programming |
| Interrupt Output | Open-drain interrupt output (active LOW) |
| Power Consumption | Max 50 μA at fSCL = 0 Hz |
| Data Retention Voltage | 1.0 V to 6.0 V |
Key Features
- I2C-bus interface for serial data transfer
- Built-in 32.768 kHz oscillator circuit for clock and calendar functions
- 240 x 8-bit low-voltage RAM for data storage
- Automatic word address register increment after each written or read data byte
- Alarm registers or free RAM locations programmable
- Power-On Reset (POR) circuit for stable operation
- Low power consumption with a maximum of 50 μA at fSCL = 0 Hz
Applications
The NXP PCF8583T/5,518 is suitable for a variety of applications, including:
- Real-time clock and calendar functions in embedded systems
- Data logging and storage in industrial and consumer electronics
- Alarm and timer functions in automation and control systems
- Low-power devices requiring precise timekeeping and additional memory
Q & A
- What is the primary function of the NXP PCF8583T/5,518? The primary function is to provide a real-time clock and calendar with additional RAM for data storage.
- What is the operating voltage range of the PCF8583T/5,518? The operating voltage range is from 1.0 V to 6.0 V.
- What type of interface does the PCF8583T/5,518 use for data transfer? It uses a two-line bidirectional I2C-bus interface.
- How much RAM does the PCF8583T/5,518 have? It has 2048 bits of RAM, organized as 256 words by 8 bits.
- What is the frequency of the built-in oscillator? The built-in oscillator frequency is 32.768 kHz.
- Can the PCF8583T/5,518 be used in low-power applications? Yes, it is designed for low power consumption with a maximum of 50 μA at fSCL = 0 Hz.
- What is the purpose of the A0 pin on the PCF8583T/5,518? The A0 pin is used for programming the hardware address, allowing multiple devices to be connected to the bus without additional hardware.
- Does the PCF8583T/5,518 have an interrupt output? Yes, it has an open-drain interrupt output that is active LOW.
- What is the operating temperature range of the PCF8583T/5,518? The operating temperature range is from -40°C to +85°C.
- Can the alarm registers be programmed as free RAM locations? Yes, the alarm registers can be programmed as free RAM locations when the alarm is disabled.
