Overview
The CAT25256XI-T2C is a 256-Kb SPI Serial CMOS EEPROM device manufactured by ON Semiconductor. This device is internally organized as 32Kx8 bits and features a 64-byte page write buffer. It supports the Serial Peripheral Interface (SPI) protocol and is enabled through a Chip Select (CS) input. The device includes necessary bus signals such as clock input (SCK), data input (SI), and data output (SO) lines, along with a HOLD input to pause any serial communication. The CAT25256XI-T2C is designed for high reliability applications with on-chip Error Correction Code (ECC) and both software and hardware write protection.
Key Specifications
| Parameter | Min | Max | Units |
|---|---|---|---|
| Supply Voltage Range | 1.8 | 5.5 | V |
| Clock Frequency (SPI) | 5 | 20 | MHz |
| Input Low Voltage (VIL) | -0.5 | 0.3 VCC | V |
| Input High Voltage (VIH) | 0.7 VCC | VCC + 0.5 | V |
| Output Low Voltage (VOL1) @ VCC > 2.5V, IOL = 3.0mA | 0.4 | V | |
| Output High Voltage (VOH1) @ VCC > 2.5V, IOH = -1.6mA | VCC - 0.8 | V | |
| Output Low Voltage (VOL2) @ VCC > 1.8V, IOL = 150μA | 0.2 | V | |
| Output High Voltage (VOH2) @ VCC > 1.8V, IOH = -100μA | VCC - 0.2 | V | |
| Operating Temperature Range | -40 | 85 | °C (Industrial), -40 to 125°C (Extended) |
| Power-up to Read Operation | 0.1 | 1 | ms |
| Power-up to Write Operation | 0.1 | 1 | ms |
Key Features
- Supports SPI Modes (0,0) and (1,1)
- 64-byte page write buffer
- On-chip Error Correction Code (ECC) for high reliability applications
- Software and hardware write protection, including partial and full array protection
- Power-On Reset (POR) circuitry to protect against wrong state power-up and 'brown-out' failure
- HOLD input to pause serial communication
- Status Register with RDY, WEL, BP0, and BP1 bits for status and control
- Low power standby mode and write disable state after power-up
Applications
The CAT25256XI-T2C is suitable for a variety of applications requiring non-volatile memory, including:
- Industrial control systems
- Automotive systems
- Consumer electronics
- Medical devices
- High reliability systems where data integrity is crucial
Q & A
- What is the memory organization of the CAT25256XI-T2C?
The device is internally organized as 32Kx8 bits. - What is the maximum clock frequency supported by the CAT25256XI-T2C?
The device supports up to 20 MHz clock frequency. - What is the supply voltage range for the CAT25256XI-T2C?
The supply voltage range is from 1.8 V to 5.5 V. - How does the HOLD input function on the CAT25256XI-T2C?
The HOLD input can be used to pause serial communication between the host and the CAT25256XI-T2C by taking HOLD low while SCK is low. - What kind of write protection does the CAT25256XI-T2C offer?
The device offers both software and hardware write protection, including partial and full array protection. - What is the purpose of the Status Register in the CAT25256XI-T2C?
The Status Register contains status and control bits such as RDY, WEL, BP0, and BP1 to indicate the device's status and control write operations. - How does the Power-On Reset (POR) circuitry function in the CAT25256XI-T2C?
The POR circuitry protects the internal logic against powering up in the wrong state and prevents 'brown-out' failure following a temporary loss of power. - Can the CAT25256XI-T2C be used in high reliability applications?
Yes, the device is suitable for high reliability applications due to its on-chip Error Correction Code (ECC). - What is the power-up delay to read or write operations for the CAT25256XI-T2C?
The power-up delay to read or write operations is between 0.1 ms and 1 ms. - How does the device handle page write operations?
The device allows up to 64 bytes of data to be written in a single page write operation, with automatic increment of lower order address bits.
