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24AA64T-E/OT

Name: 24AA64T-E/OT
Rating: 4.7 (12 reviews)

IC EEPROM 64KBIT I2C SOT23-5

メーカー
Mfr。パート #24AA64T-E/OT
パッケージ SC-74A, SOT-753
データシート
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仕様

Supplier	Microchip Technology
Package	Tape & Reel (TR),Cut Tape (CT)
ProductStatus	Active
MemoryType	Non-Volatile
MemoryFormat	EEPROM
Technology	EEPROM
MemorySize	64Kb (8K x 8)
MemoryInterface	I²C
ClockFrequency	400 kHz
WriteCycleTime-WordPage	5ms
AccessTime	900 ns
Voltage-Supply	1.7V ~ 5.5V
OperatingTemperature	-40°C ~ 125°C (TA)
MountingType	Surface Mount
Package/Case	SC-74A, SOT-753

概要

Description

24AA64T-E/OT is Microchip’s 64-kbit I2C serial EEPROM. Key points:
- Memory and interface: 8,192 bytes of non-volatile memory accessible via I2C. Uses 2-byte memory addressing and allows random or sequential reads.
- Organization: 8 Kbytes total; writes typically in 32-byte pages.
- Performance: Page writes wrap within a page; write cycle time ≈ 5 ms per operation.
- Features: Write-protect (WP) pin to guard memory; operates over a wide voltage range.
- Variants indicated: -E usually denotes extended temperature (-40°C to +85°C); -OT indicates packaging (often Tape & Reel).
- Applications: stores configuration/calibration data, device parameters, logs, or any small non-volatile data retained across power cycles.
Note: Always consult the latest datasheet for exact electrical specs (Vcc range, timing, addressing, and packaging options) for your specific part revision.

Features

24AA64T-E/OT features (concise):
- 64-kbit I2C serial EEPROM (8 K × 8) with 16-bit addressing.
- I2C two-wire interface; supports standard and fast modes (up to 400 kHz).
- A0–A2 address pins (up to 8 devices on the bus); WP (hardware write protect) pin.
- 32-byte page write; random and sequential reads/writes.
- Write cycle time: typical ~5 ms (max around 10 ms).
- Endurance: ~1,000,000 write cycles; Data retention: ~100 years.
- Supply voltage: 2.7–5.5 V (industrial range available).
- Operating temperature: -40°C to +125°C (OT = industrial).
- Low-power operation; suitable for battery-powered/applications with standby mode.
- Packaging: 8-pin options (DIP/SOIC/MSOP/TSSOP); RoHS compliant; Tape-and-Reel available.

Package

24AA64T-E/OT comes in an 8-pin small-outline (SOIC) package. The -E denotes extended temperature (-40°C to +125°C), and /OT indicates Tape & Reel packaging.

Pinout

- Pin count: 8 pins
- Function: 64‑Kbit I2C serial EEPROM
- Pinout (typical): 1 A0, 2 A1, 3 A2, 4 GND, 5 SDA, 6 SCL, 7 WP, 8 VCC
- A0–A2 are hardware address inputs; WP is write protection; SDA/SCL are I2C data/clock lines; VCC and GND power the device.

Manufacturer

- Manufacturer: Microchip Technology Inc.
- What kind of company: A global American semiconductor company that designs, develops, and manufactures microcontrollers, nonvolatile memory (EEPROM/Flash), and other analog/interface ICs (publicly traded, NASDAQ: MCHP).

Application

- Automotive and industrial environments (extended temperature, reliable I2C EEPROM)
- Storing non-volatile data in embedded systems: device IDs, calibration/configuration parameters, and firmware constants
- Security-related data: keys, serial numbers, authentication data
- Data logging and usage/history records
- Used in ECUs, dashboards, sensors, telematics, motor drives, IoT devices, and consumer electronics requiring robust memory.

Equivalent

Equivalent 64‑Kb I2C serial EEPROMs (same interface/pinout):
- AT24C64 / AT24C64A (Atmel/Microchip)
- M24C64‑W (STMicroelectronics)
- CAT24C64B / CAT24C64C (ON Semiconductor)
- FM24C64 (Fujitsu)
- X24C64 (Xicor, now Renesas)
These are drop‑in replacements in most 24AA64T/24C64‑type applications.