My Inquiry
My Account
Microchip Technology AT24C02B-TH-T
- Part No.:
- AT24C02B-TH-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT24C02B-TH-T.pdf
- Description:
- IC EEPROM 2KBIT I2C 1MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,246
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT24C02B-TH-T from Microchip Technology (formerly Atmel) is a 2 Kbit I²C-compatible serial EEPROM with 256 × 8-bit organization, 1.8 V to 5.5 V operation, hardware write protection via WP pin, and 8-lead TSSOP package with NiPdAu lead finish. It supports up to 1 MHz (5 V) or 400 kHz (1.8–2.7 V) bus speeds and delivers 1 million write cycles with 100-year data retention for embedded configuration storage.
For engineers reviewing the AT24C02B-TH-T datasheet, AT24C02B-TH-T pinout, AT24C02B-TH-T application, or AT24C02B-TH-T equivalent, this page provides verified pin functions, real-world timing constraints (tWR = 5 ms max), noise-suppressed Schmitt-trigger inputs, page-write capability (8-byte pages), and validated alternatives for industrial control, sensor calibration, and power-management firmware storage.
Technical Context
The AT24C02B-TH-T implements a two-wire I²C interface with open-drain SDA/SCL pins, device addressing via hardwired A0–A2 inputs (supporting up to eight devices on one bus), and hardware-based write protection controlled by the WP pin. Its internal architecture includes an 8-bit address counter, page buffer logic for 8-byte writes, and high-voltage pump circuitry for EEPROM programming.
It operates across –40°C to +85°C with supply current as low as 0.6 µA (VCC = 1.8 V standby) and features Schmitt-triggered, filtered inputs for robust noise immunity in electrically noisy environments. The device uses acknowledge polling to signal write completion and supports software reset after protocol interruption.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8), enabling storage of small configuration tables or calibration constants without external memory controllers |
| Interface | Two-wire I²C (SCL/SDA), compatible with standard microcontroller I²C peripherals and requiring only two GPIOs plus pull-ups |
| Write Speed | 5 ms maximum self-timed write cycle, eliminating need for external timing control or busy-wait polling in most applications |
| Voltage Range | 1.8 V to 5.5 V operation, supporting direct interfacing with 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains without level shifters |
| Endurance & Retention | 1 million write cycles and 100-year data retention, suitable for infrequent but mission-critical parameter updates (e.g., metering, medical settings) |
| Package | 8-lead TSSOP (8A2), 4.4 mm body width, surface-mount compatible with automated assembly and space-constrained PCB layouts |
| Write Protection | Hardware WP pin - tied to VCC disables all writes (full 2K array protected), tied to GND enables normal read/write operations |
Pinout & Package
AT24C02B-TH-T is supplied in an 8-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, with 0.65 mm pitch, 4.4 mm body width, and NiPdAu lead finish for enhanced solderability and corrosion resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardwired LSB of 3-bit device address; sets unique I²C slave address when multiple AT24C02B devices share a bus |
| A1 | Device Address Input | Mid-bit of device address; enables up to eight independent 2K EEPROMs on same I²C bus (0x50–0x57 range) |
| A2 | Device Address Input | MSB of device address; combined with A0/A1, defines full 7-bit I²C address before R/W bit |
| GND | Ground Reference | Primary return path for VCC and I/O signals; must be low-impedance to ensure stable I²C signaling and EEPROM reliability |
| VCC | Power Supply | 1.8–5.5 V supply input; powers internal logic, charge pump, and memory array; decoupling capacitor required near pin |
| WP | Write Protect Control | Active-high hardware lock: logic high (VCC) blocks all write commands; logic low (GND) permits full read/write access |
| SCL | Serial Clock Input | Positive-edge clock for data-in; negative-edge clock for data-out; requires external pull-up; max frequency 1 MHz (5 V) |
| SDA | Serial Data I/O | Bidirectional open-drain line shared across I²C bus; requires external pull-up; supports multi-master arbitration and clock stretching |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional down to 1.8 V supply - enables direct integration into battery-powered or ultra-low-power systems without voltage translation |
| Schmitt-trigger inputs | Input hysteresis on SCL/SDA/A0–A2/WP eliminates false triggering from slow-rising or noisy signals in industrial environments |
| Page write mode | 8-byte burst writes reduce I²C transaction overhead by >75% vs. byte-by-byte writes - critical for fast parameter updates |
| Noise filtering | Internal digital filtering suppresses glitches <50 ns (1.8–2.7 V) or <40 ns (5 V), preventing spurious START/STOP detection |
| Software reset recovery | 9-clock dummy sequence restores I²C state after bus hang or power glitch - no hardware reset needed for protocol recovery |
Applications
| Industrial Sensor Calibration | Consumer Device Configuration |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during system boot or recalibration routines via I²C. Use Value: Enables field-replaceable sensors with retained calibration; eliminates need for manual trim pots or external programming fixtures. |
Use Scenario: Saving user preferences (volume, display brightness, language) in smart home hubs after power loss. IC Role / Device Role / Timing Role: Low-power configuration memory written infrequently but read at every power-on reset. Use Value: Guarantees consistent UX across reboots; 100-year retention ensures settings survive product lifetime without backup batteries. |
| Power Supply Firmware Storage | Medical Device Parameter Archiving |
Use Scenario: Holding digitally programmed output voltage/current limits and fault thresholds in isolated DC-DC modules. IC Role / Device Role / Timing Role: Secure, write-protected memory accessed only during firmware update or factory setup. Use Value: WP pin prevents accidental overwriting during runtime; 1.8 V compatibility allows direct MCU interface without level shifters. |
Use Scenario: Recording device-specific operational parameters (e.g., usage hours, sterilization cycles) in portable diagnostic equipment. IC Role / Device Role / Timing Role: Tamper-resistant audit log storage updated once per session via I²C from host microcontroller. Use Value: Meets IEC 62304 traceability requirements; 1 million endurance supports >27 years of daily updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M24C02-WMN6TP | STMicroelectronics 2 Kbit I²C EEPROM; identical 256 × 8 organization, 1.8–5.5 V, 400 kHz/1 MHz speeds, but uses WLCSP package (2.0 × 1.6 mm) instead of TSSOP | Requires different PCB footprint and reflow profile; lacks WP pin - write protection relies solely on software address locking | Select when board space is constrained and hardware write protection is not required; verify WLCSP assembly capability. |
| BR24G02NUX-10 | Rohm 2 Kbit I²C EEPROM; same voltage range and timing, but features built-in error correction (ECC) and automatic rewrite on read failure | ECC improves long-term reliability in high-radiation or extended-temperature deployments; slightly higher standby current (1.0 µA @ 1.8 V) | Choose for safety-critical applications where data integrity must be actively monitored; accept minor layout changes for 8-pin USON package. |
Compared with AT24C02B-TH-T, M24C02-WMN6TP offers smaller size but removes hardware write protection, while BR24G02NUX-10 adds ECC at the cost of higher quiescent current and different packaging - both require PCB redesign but provide validated functional overlap in configuration storage roles.
Availability
AT24C02B-TH-T is available at Aetrix Electronics and suitable for industrial control systems, consumer electronics configuration management, and medical device parameter archiving requiring stable component supply across multi-year production cycles.
Supply support for AT24C02B-TH-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT24Cxx family of serial EEPROMs.
The AT24C02B product line was designed for low-power, space-constrained embedded systems requiring reliable nonvolatile storage of configuration data, calibration values, and firmware parameters across automotive, industrial, and consumer applications.
FAQ
What is the operating voltage range of the AT24C02B-TH-T?
The AT24C02B-TH-T operates from 1.8 V to 5.5 V, supporting direct interface with 1.8 V, 2.5 V, 3.3 V, and 5 V logic families. This wide range eliminates the need for level-shifting circuitry in mixed-voltage designs and enables use in battery-powered systems where supply voltage may sag below 2.0 V during discharge.
How does the WP pin function on the AT24C02B-TH-T?
The WP (Write Protect) pin on the AT24C02B-TH-T is a hardware enable for write operations: when pulled high to VCC, it disables all write commands to the entire 2 Kbit array; when grounded, full read/write access is permitted. This provides deterministic, glitch-immune protection against unintended firmware corruption during system operation.
What package type is used for the AT24C02B-TH-T?
The AT24C02B-TH-T uses an 8-lead Thin Shrink Small Outline Package (TSSOP), designated as 8A2 per Atmel's ordering guide. It measures 4.4 mm in body width, has 0.65 mm lead pitch, and features NiPdAu lead finish for superior solder joint reliability and wire-bond compatibility in high-volume manufacturing.
Can the AT24C02B-TH-T be used in automotive applications?
The AT24C02B-TH-T is rated for industrial temperature range (–40°C to +85°C) and is not qualified to AEC-Q100 standards. While it may function in some under-hood or cabin applications, Microchip explicitly states that Atmel serial EEPROMs "are not intended, authorized, or warranted for use in automotive applications" - use AEC-Q100-qualified variants like AT24C02C-SSHM-T for automotive designs.
What is the maximum I²C clock frequency supported by the AT24C02B-TH-T?
The AT24C02B-TH-T supports up to 1 MHz I²C clock frequency at VCC = 5.0 V, and 400 kHz at VCC = 1.8 V, 2.5 V, or 2.7 V. These speeds are guaranteed across the full operating temperature range (–40°C to +85°C) with CL ≤ 100 pF, enabling fast parameter loading in time-sensitive embedded boot sequences.
AT24C02B-TH-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 550 ns
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
AT24C02B-TH-T FAQ
1.How can I place an order for AT24C02B-TH-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C02B-TH-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT24C02B-TH-T reliable?
The price and inventory of AT24C02B-TH-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C02B-TH-T is usually 5 days.
3.What payment methods are accepted for AT24C02B-TH-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C02B-TH-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C02B-TH-T?
AT24C02B-TH-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C02B-TH-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT24C02B-TH-T?
For technical support, including AT24C02B-TH-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C02B-TH-T requirements.
6.How does Aetrix verify that AT24C02B-TH-T is sourced from the original manufacturer or authorized distributors?
All AT24C02B-TH-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT24C02B-TH-T meets industry standards.
7.What is the process for return or replacement of AT24C02B-TH-T?
All AT24C02B-TH-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C02B-TH-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT24C02B-TH-T part is unused and in its original packaging.
Return procedure for AT24C02B-TH-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C02B-TH-T Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
