AT24C02B-TH-T

AT24C02B-TH-T is a 2 Kbit I2C serial EEPROM from Atmel (now Microchip). It provides non-volatile storage of 256 bytes accessible over the I2C two-wire bus.
Key points:
- Capacity: 256 x 8 bits (2 Kbit total).
- Interface: I2C (standard 100 kHz, fast 400 kHz; supports multi-device bus).
- Memory addressing: 8-bit word address; device ADDRESS pins A0–A2 allow up to 8 devices on the same bus (address bits 1010 A2 A1 A0).
- Page size: 8 bytes; supports 8-byte page writes.
- Write cycle: ~5 ms typical (tWR); acknowledges polling after write.
- Endurance: ~100,000 write cycles; data retention ~40 years.
- Voltage & temp: ~1.7–5.5 V supply; industrial temperature range (check the exact TH-T variant).
- WP pin: Write-protect to disable writes when asserted.
- Packaging note: TH-T indicates a specific package/temperature code; verify in the datasheet for exact packaging and temp range.
Applications: small configuration data, calibration tables, and firmware parameters in microcontroller-based systems.

Equivalent products (2Kbit I2C EEPROM, 8-pin) from other vendors:
- Microchip: 24LC02B / 24AA02
- STMicroelectronics: M24C02-W
- NXP: 24C02WP / 24C02W
- ON Semiconductor: CAT24C02
Note: These are pin-compatible substitutes commonly used for AT24C02B-TH-T.

AT24C02B-TH-T features:
- 2-Kbit I2C Serial EEPROM (256 x 8)
- I2C two-wire interface: standard mode up to 100 kHz, fast mode up to 400 kHz
- 3 hardware address pins (A0–A2) for up to 8 devices on one bus (addresses 0x50–0x57)
- 8-byte page write; supports random and sequential reads
- Write cycle time ≈ 5 ms
- Endurance: about 1,000,000 write cycles; data retention > ~100 years
- Operating voltage: 1.7–5.5 V
- Operating temperature: −40 °C to +85 °C
- Low power consumption; WP pin for write protection
- 8-pin packages; TH-T suffix denotes Tape & Reel packaging for automated handling

8 pins. It is a 2-kbit I2C serial EEPROM (non-volatile memory). Pinout (typical): 1 A0, 2 A1, 3 A2, 4 GND, 5 SDA, 6 SCL, 7 WP, 8 VCC. Uses I2C two-wire interface; A0–A2 set device address; WP provides write protection; stores 256 x 8 bits.

- Manufacturer: Atmel Corporation (now part of Microchip Technology Inc.).
- What kind of company: A multinational semiconductor company that designs and manufactures memory devices (like EEPROM) and microcontrollers for embedded systems.

Common application areas for AT24C02B-TH-T (2-kbit I2C serial EEPROM):
- Nonvolatile storage for microcontroller configuration and calibration data
- Device identification: serial numbers, lot codes, manufacturing data
- Small lookup tables and sensor compensation data
- Firmware versioning, boot flags, and simple update schemes
- Data logging buffers, event counters, and other tiny parameter storage
- General I2C memory extension in embedded systems (consumer electronics, appliances, wearables, automotive accessories) where persistent, low-volume data is needed

It's an 8-pin Small-Outline (SOIC) EEPROM in Tape‑and‑Reel packaging (suffix -T).