My Inquiry
My Account
Microchip Technology AT24C08B-TSU-T
- Part No.:
- AT24C08B-TSU-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
AT24C08B-TSU-T.pdf
- Description:
- IC EEPROM 8KBIT I2C 1MHZ SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,891
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT24C08B-TSU-T from Microchip Technology is a 8K-bit (1024 × 8) two-wire serial EEPROM with 1.8V to 5.5V operation, 400 kHz I²C interface at 1.8V/2.5V/2.7V, hardware write protection via WP pin, and 16-byte page write capability. It operates across –40°C to +85°C and is used in industrial sensor calibration storage, embedded system configuration retention, and power-meter firmware parameter backup.
For engineers reviewing the AT24C08B-TSU-T datasheet, AT24C08B-TSU-T pinout, AT24C08B-TSU-T application, or AT24C08B-TSU-T equivalent, key selection criteria include its 5-lead SOT23 package footprint, A2-only hardware addressability, 1 million write endurance, and compatibility with low-voltage microcontroller I²C peripherals requiring robust nonvolatile data logging.
Technical Context
The AT24C08B-TSU-T implements a standard two-wire (I²C-compatible) serial interface with Schmitt-triggered, noise-filtered SCL and SDA inputs. It uses a single A2 pin for hardware device addressing-A0 and A1 are no-connect-enabling up to two devices on one bus. Internal memory is organized as 64 pages of 16 bytes each, requiring a 10-bit word address for random access.
Write operations support both byte and page modes, with self-timed internal write cycles completing in ≤5 ms. The WP pin provides hardware-level protection against accidental writes when pulled high, while standby current remains ≤3.0 µA at 1.8V. All timing complies with I²C Fast-mode specifications at 400 kHz under 1.8V–2.7V supply conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8192 bits (1024 × 8), enabling storage of 1KB of persistent configuration or calibration data |
| Interface | Two-wire I²C-compatible serial bus, supporting 400 kHz clock rate at 1.8V for low-power embedded host integration |
| Supply Voltage | 1.8V to 5.5V operation, allowing direct interfacing with 1.8V, 2.5V, 2.7V, 3.3V, and 5V microcontrollers without level shifting |
| Write Endurance | 1 million write cycles per memory location, suitable for frequent field-updatable parameter logging |
| Data Retention | 100 years at +25°C, ensuring long-term reliability in unattended industrial deployments |
| Package | 5-lead SOT23 (5TS1), 2.90 mm × 1.60 mm body, optimized for space-constrained PCB layouts |
| Operating Temp | –40°C to +85°C industrial grade, validated for use in metering, HVAC controls, and factory automation |
Pinout & Package
AT24C08B-TSU-T is housed in a 5-lead SOT23 package (package code 5TS1), with pin 1 marked by a dot. Pin functions follow I²C protocol conventions and device-addressing constraints specific to the 8K variant: A0 and A1 are no-connect; only A2 serves as hardware address input.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A2) | Hardware Device Address Input | Hardwires MSB of device address; must be tied HIGH/LOW to select one of two possible AT24C08B addresses on shared bus |
| 2 (GND) | Ground Reference | Return path for VCC and signal logic; requires low-impedance connection to system ground plane |
| 3 (SDA) | Serial Data I/O | Open-drain bidirectional line; requires external pull-up resistor (typically 2.2–10 kΩ) to VCC for I²C compliance |
| 4 (SCL) | Serial Clock Input | Master-generated clock controlling data sampling; Schmitt-triggered for noise immunity on noisy boards |
| 5 (VCC) | Power Supply | Accepts 1.8V–5.5V; decoupling capacitor (0.1 µF ceramic) recommended within 5 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 1.8V supply, enabling direct interface with ultra-low-power MCUs and battery-backed systems |
| Hardware Write Protection | WP pin disables all write operations when driven HIGH, preventing corruption during brown-out or firmware update sequences |
| Page Write Capability | 16-byte page writes reduce I²C transaction overhead by up to 15× versus byte-by-byte programming |
| Noise-Suppressed Inputs | Schmitt-trigger + filtering on SCL/SDA ensures reliable communication in electrically noisy industrial environments |
| High Endurance & Retention | 1M write cycles and 100-year data retention meet long-lifecycle requirements for smart meters and medical devices |
Applications
| Smart Energy Metering | Industrial Sensor Calibration |
|---|---|
Use Scenario: Storing tariff tables, pulse-count history, and time-of-use registers in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: Nonvolatile configuration and event-log storage with guaranteed data integrity over 10+ year field life. Use Value: Enables regulatory-compliant tamper-proof data retention without external backup capacitors or supercapacitors. | Use Scenario: Saving factory-trimmed offset/gain coefficients for temperature, pressure, and humidity sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Persistent calibration parameter storage accessed during power-on initialization and field recalibration. Use Value: Eliminates need for re-trimming after power loss; supports automated calibration workflows via I²C host. |
| Embedded System Configuration | Power Supply Sequencing Control |
Use Scenario: Holding boot mode selection, network MAC address, and user-defined defaults in network edge gateways. IC Role / Device Role / Timing Role: Boot-time configuration loader for ARM Cortex-M hosts using standard I²C drivers. Use Value: Reduces BOM count by replacing discrete OTP fuses; supports field-upgradable settings via firmware. | Use Scenario: Storing voltage-ramp profiles and fault recovery thresholds for multi-rail DC-DC controllers in telecom rectifiers. IC Role / Device Role / Timing Role: Nonvolatile timing and sequencing parameter store accessed by PMIC or FPGA sequencer. Use Value: Ensures repeatable power-up behavior across thermal cycles and firmware updates without manual reprogramming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C08D-TSU-T | Same 8K capacity and 5-lead SOT23 package; updated revision with enhanced ESD rating (4 kV HBM) and tighter tAA (0.55 µs max at 5V) | Preferred for new designs targeting higher board-level ESD immunity and faster read response in real-time control loops | Select AT24C08D-TSU-T when upgrading legacy AT24C08B-based designs for improved robustness and timing margin. |
| M24C08-RMN6TP | 8K I²C EEPROM in 5-lead SOT23; supports 1 MHz at 5V but only 100 kHz at 1.8V; no WP pin-write protection implemented in software only | Suitable where higher-speed reads at 5V are critical, but unsuitable for write-critical applications lacking hardware lockout | Choose M24C08-RMN6TP only if 1.8V write speed is not required and software-controlled write enable is acceptable. |
Compared with AT24C08B-TSU-T, AT24C08D-TSU-T offers measurable improvements in ESD tolerance and read timing, while M24C08-RMN6TP trades hardware write protection for marginal speed gain at full voltage-making AT24C08B-TSU-T the balanced choice for industrial reliability-critical designs.
Availability
AT24C08B-TSU-T is available at Aetrix Electronics and suitable for smart metering, industrial sensor calibration, and embedded configuration storage requiring stable component supply across extended product lifecycles.
Supply support for AT24C08B-TSU-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 is a global semiconductor company specializing in microcontrollers, analog components, and nonvolatile memory solutions for industrial, automotive, and communications markets.
The AT24C08B belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, space-constrained applications needing reliable, low-voltage, I²C-compatible nonvolatile storage with hardware write protection.
FAQ
What is the maximum I²C clock frequency supported by AT24C08B-TSU-T at 1.8V?
The AT24C08B-TSU-T supports up to 400 kHz I²C clock frequency when operated at 1.8V, 2.5V, or 2.7V. This is specified in Table 4 of the datasheet under "AC Characteristics" and enables reliable communication with low-power microcontrollers without requiring external level shifters or clock dividers.
How many AT24C08B-TSU-T devices can share the same I²C bus?
Up to two AT24C08B-TSU-T devices can share one I²C bus, as only the A2 pin is used for hardware addressing (A0 and A1 are no-connect). Setting A2 HIGH or LOW selects between device addresses 0xA0 and 0xA8, respectively-enabling dual-device configurations in compact systems.
Does AT24C08B-TSU-T require external pull-up resistors on SDA and SCL lines?
Yes, AT24C08B-TSU-T requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and speed; 4.7 kΩ is commonly used for 400 kHz operation with ≤400 pF total bus load.
What happens to the AT24C08B-TSU-T when the WP pin is left floating?
Leaving the WP pin floating on AT24C08B-TSU-T may cause unpredictable write behavior due to noise coupling. The datasheet specifies that WP must be actively driven HIGH for full-array write protection or LOW for normal read/write operation-never left unconnected. A pull-down resistor (e.g., 10 kΩ to GND) ensures safe default operation.
Can AT24C08B-TSU-T be used in place of AT24C04B-TSU-T in an existing design?
No-AT24C08B-TSU-T is not a drop-in replacement for AT24C04B-TSU-T. While both share the same 5-lead SOT23 package and voltage range, they differ in memory size (8K vs. 4K), device addressing (A2-only vs. A2+A1), and internal page structure (64×16 vs. 32×16). Firmware and address-map logic must be revised to accommodate the larger memory space and altered addressing scheme.
AT24C08B-TSU-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 1K 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:
- SOT-23-5
AT24C08B-TSU-T FAQ
1.How can I place an order for AT24C08B-TSU-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C08B-TSU-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 AT24C08B-TSU-T reliable?
The price and inventory of AT24C08B-TSU-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C08B-TSU-T is usually 5 days.
3.What payment methods are accepted for AT24C08B-TSU-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C08B-TSU-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C08B-TSU-T?
AT24C08B-TSU-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C08B-TSU-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 AT24C08B-TSU-T?
For technical support, including AT24C08B-TSU-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C08B-TSU-T requirements.
6.How does Aetrix verify that AT24C08B-TSU-T is sourced from the original manufacturer or authorized distributors?
All AT24C08B-TSU-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 AT24C08B-TSU-T meets industry standards.
7.What is the process for return or replacement of AT24C08B-TSU-T?
All AT24C08B-TSU-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C08B-TSU-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 AT24C08B-TSU-T part is unused and in its original packaging.
Return procedure for AT24C08B-TSU-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C08B-TSU-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…
