仕様
| 属性 | 値 |
| Supplier | Microchip Technology |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Part Status | Active |
| Memory Type | Non-Volatile |
| Memory Format | EEPROM |
| Technology | EEPROM |
| Memory Size | 64Kb (8K x 8) |
| Memory Interface | I²C |
| Clock Frequency | 400 kHz |
| Write Cycle Time - Word Page | 5ms |
| Access Time | 900 ns |
| Voltage - Supply | 1.7V ~ 5.5V |
| Operating Temperature | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount |
概要
Description
24AA64T-E/OT is Microchip’s 64-kilobit I2C serial EEPROM. It provides non-volatile storage for data that must survive power cycles, such as configuration data, calibration constants, or device IDs.
Key points:
- Size and organization: 64 Kbit memory (8,192 bytes), typically organized as 8K × 8.
- Interface: I2C two-wire. Device address allows memory banking (standard 7-bit addressing; supports both 100 kHz and 400 kHz modes).
- Access: Random and sequential read; 16-byte page write capability.
- Performance and endurance: Write cycle ~a few milliseconds; endurance around 1,000,000 write cycles; long data retention (on the order of decades).
- Power and temp: Operating voltage typically 1.7–5.5 V; extended/industrial temperature range (suffix E) for -40°C to +125°C; packaging options indicated by the OT variant.
- Applications: Configuration data storage, calibration tables, serial numbers, and other small non-volatile data in embedded systems.
- Packaging: 8-pin packages (e.g., SOIC, PDIP) with options for different temperature grades and packaging.
For exact voltage, timing, and package details, consult the datasheet.
Key points:
- Size and organization: 64 Kbit memory (8,192 bytes), typically organized as 8K × 8.
- Interface: I2C two-wire. Device address allows memory banking (standard 7-bit addressing; supports both 100 kHz and 400 kHz modes).
- Access: Random and sequential read; 16-byte page write capability.
- Performance and endurance: Write cycle ~a few milliseconds; endurance around 1,000,000 write cycles; long data retention (on the order of decades).
- Power and temp: Operating voltage typically 1.7–5.5 V; extended/industrial temperature range (suffix E) for -40°C to +125°C; packaging options indicated by the OT variant.
- Applications: Configuration data storage, calibration tables, serial numbers, and other small non-volatile data in embedded systems.
- Packaging: 8-pin packages (e.g., SOIC, PDIP) with options for different temperature grades and packaging.
For exact voltage, timing, and package details, consult the datasheet.
Equivalent
Equivalent parts (64 Kbit I2C EEPROM, pin-compatible with 24AA64T-E/OT) from other vendors include:
- AT24C64A/D (Atmel/Microchip)
- M24C64-W (STMicroelectronics)
- CAT24C64 / CAT24C64B (ON Semiconductor)
- 24LC64 / 24C64 (Microchip legacy)
These share the same I2C interface, 1-byte addressing, and similar voltage ranges. Check package and timing to ensure compatibility.
- AT24C64A/D (Atmel/Microchip)
- M24C64-W (STMicroelectronics)
- CAT24C64 / CAT24C64B (ON Semiconductor)
- 24LC64 / 24C64 (Microchip legacy)
These share the same I2C interface, 1-byte addressing, and similar voltage ranges. Check package and timing to ensure compatibility.
Features
Key features of 24AA64T-E/OT (64Kbit I2C EEPROM, automotive grade):
- 64Kbit serial EEPROM (8K × 8) with I2C two‑wire interface
- 16‑bit memory addressing (MSB/LSB) for full 8K data space
- Random and sequential read; page write up to 32 bytes
- Write cycle typically ~5 ms; acknowledge polling for completion
- WP pin for hardware write protection and A0–A2 pins for up to 8 devices on the bus
- Operating voltage in common I2C range (typical 1.8–5.5 V)
- Endurance: about 1,000,000 write cycles; data retention ~200 years
- Temperature: automotive grade, -40°C to +125°C (suffix OT)
- 8‑pin package; Tape & Reel packaging (-T) available; RoHS compliant
- Low standby current; suitable for power‑conscious applications
- ESD protection and general reliability features typical of Microchip I2C EEPROMS
Note: exact voltage range and timing can vary slightly by package/lot; refer to the datasheet for precise specs.
- 64Kbit serial EEPROM (8K × 8) with I2C two‑wire interface
- 16‑bit memory addressing (MSB/LSB) for full 8K data space
- Random and sequential read; page write up to 32 bytes
- Write cycle typically ~5 ms; acknowledge polling for completion
- WP pin for hardware write protection and A0–A2 pins for up to 8 devices on the bus
- Operating voltage in common I2C range (typical 1.8–5.5 V)
- Endurance: about 1,000,000 write cycles; data retention ~200 years
- Temperature: automotive grade, -40°C to +125°C (suffix OT)
- 8‑pin package; Tape & Reel packaging (-T) available; RoHS compliant
- Low standby current; suitable for power‑conscious applications
- ESD protection and general reliability features typical of Microchip I2C EEPROMS
Note: exact voltage range and timing can vary slightly by package/lot; refer to the datasheet for precise specs.
Pinout
- Pin count: 8 pins (8‑pin package, e.g., SOIC/DIP).
- Pin functions (pin1–pin8, orientation may vary):
- A0, A1, A2: hardware address inputs
- GND: ground
- SDA: I2C data
- SCL: I2C clock
- WP: write protect (active high)
- VCC: supply voltage
- Function: 64‑Kbit I2C serial EEPROM (8K × 8), with 3 address pins to allow multiple devices on the same bus; WP protects memory when asserted.
- Pin functions (pin1–pin8, orientation may vary):
- A0, A1, A2: hardware address inputs
- GND: ground
- SDA: I2C data
- SCL: I2C clock
- WP: write protect (active high)
- VCC: supply voltage
- Function: 64‑Kbit I2C serial EEPROM (8K × 8), with 3 address pins to allow multiple devices on the same bus; WP protects memory when asserted.
Manufacturer
- Manufacturer: Microchip Technology Inc.
- What kind of company: A U.S.-based semiconductor company that designs and manufactures embedded-control solutions, including microcontrollers, non-volatile memory (EEPROMs like the 24AA64), and analog ICs.
- What kind of company: A U.S.-based semiconductor company that designs and manufactures embedded-control solutions, including microcontrollers, non-volatile memory (EEPROMs like the 24AA64), and analog ICs.
Application
24AA64T-E/OT is a 64-kbit I2C serial EEPROM (8 KB) with extended temperature range. Typical applications include:
- Storing calibration, configuration, and parameter data for microcontrollers
- Saving device IDs, serial numbers, and factory/programming data
- Lookup tables, thresholds, and small firmware configuration data
- Non-volatile boot/configuration info and lightweight event logs
- Automotive/industrial equipment and other environments needing extended-temp operation
- IoT, consumer electronics, and medical devices for persistent settings and small data storage
- Any application requiring reliable, low-power, non-volatile storage across power cycles
- Storing calibration, configuration, and parameter data for microcontrollers
- Saving device IDs, serial numbers, and factory/programming data
- Lookup tables, thresholds, and small firmware configuration data
- Non-volatile boot/configuration info and lightweight event logs
- Automotive/industrial equipment and other environments needing extended-temp operation
- IoT, consumer electronics, and medical devices for persistent settings and small data storage
- Any application requiring reliable, low-power, non-volatile storage across power cycles
Package
8-pin SOIC (surface-mount) package.
