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Microchip Technology AT24C08BN-SH-T
- Part No.:
- AT24C08BN-SH-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C08BN-SH-T.pdf
- Description:
- IC EEPROM 8KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,910
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Product details
Overview
AT24C08BN-SH-T from Microchip Technology (formerly Atmel) is an 8K-bit two-wire serial EEPROM organized as 1024 words × 8 bits, operating from 1.8 V to 5.5 V, featuring 16-byte page write, hardware write protection via WP pin, and 1 MHz I²C compatibility at 5 V. It is used in industrial sensor calibration storage, embedded system configuration retention, and power-meter firmware parameter backup.
For engineers reviewing the AT24C08BN-SH-T datasheet, AT24C08BN-SH-T pinout, AT24C08BN-SH-T application, or AT24C08BN-SH-T equivalent, key selection criteria include its 100-year data retention, 1 million write endurance, SOIC-8 package with NiPdAu lead finish, and support for partial-page writes in low-voltage embedded systems.
Technical Context
The AT24C08BN-SH-T implements a standard I²C-compatible two-wire interface with Schmitt-triggered, noise-filtered SDA and SCL inputs. Its internal architecture includes a 10-bit word address counter, 64-page memory organization (16 bytes/page), and hardware address decoding using only the A2 pin - A0 and A1 are no-connects per datasheet specification.
Write operations use self-timed internal programming with a maximum 5 ms cycle time; acknowledge polling is supported post-write. The device enters low-power standby mode after STOP condition receipt and supports software reset via 9-clock dummy sequence following protocol interruption.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8192 bits (1024 × 8-bit words), enabling storage of up to 1 KB of nonvolatile configuration or calibration data |
| Supply Voltage Range | 1.8 V to 5.5 V - supports direct interfacing with 1.8 V, 2.5 V, 3.3 V, and 5 V microcontrollers without level shifting |
| I²C Clock Frequency | Up to 1 MHz at 5 V; 400 kHz at 1.8/2.5/2.7 V - ensures timing compliance across voltage-scaled host systems |
| Write Endurance | 1 million cycles - suitable for applications requiring frequent parameter updates (e.g., energy meter tariff logging) |
| Data Retention | 100 years at +25°C - guarantees long-term reliability in unattended industrial deployments |
| Page Write Size | 16 bytes per page - optimizes write efficiency while limiting bus occupancy during burst updates |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade operation in harsh ambient environments |
Pinout & Package
AT24C08BN-SH-T is supplied in an 8-lead JEDEC SOIC package (package code 8S1), 3.9 mm × 4.9 mm body, 1.27 mm pitch, NiPdAu lead finish, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A0) | No-connect (NC) | Internally unused; must be tied to GND or left floating - not part of device addressing for AT24C08B variant |
| 2 (A1) | No-connect (NC) | Internally unused; must be tied to GND or left floating - not part of device addressing for AT24C08B variant |
| 3 (A2) | Hardware Address Input | Configures one of two possible I²C slave addresses (1010xxx0/1); enables dual-device bus topology |
| 4 (GND) | Ground Reference | System common return path; required for stable logic thresholds and noise immunity |
| 5 (SDA) | Serial Data I/O | Open-drain bidirectional bus line; requires external pull-up resistor (typically 2.2–10 kΩ) |
| 6 (SCL) | Serial Clock Input | Master-generated clock signal; edge-triggered input with Schmitt-trigger hysteresis for noise rejection |
| 7 (WP) | Write Protect Control | Active-high hardware lock: drives high to protect full memory array from accidental writes |
| 8 (VCC) | Power Supply | Primary supply rail; decoupling capacitor (0.1 µF ceramic) recommended within 10 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional down to 1.8 V supply - eliminates need for voltage translators in battery-powered or ultra-low-power systems |
| Hardware write protection | Dedicated WP pin enables fail-safe memory locking independent of software state or I²C bus activity |
| Partial page write capability | Allows writing 1–16 bytes within a single page without erasing adjacent locations - reduces wear and improves update granularity |
| Noise-suppressed inputs | Schmitt-trigger + digital filtering on SDA/SCL - rejects >50 ns glitches, enhancing robustness in electrically noisy industrial environments |
| Self-timed write cycle | Internal timing eliminates host wait-state overhead; 5 ms max duration enables deterministic firmware scheduling |
Applications
| Industrial Sensor Calibration Storage | Embedded System Configuration Retention |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for temperature, pressure, and current sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter repository accessed during power-on initialization via I²C; retains values across cold starts and brownouts. Use Value: Eliminates recalibration labor and ensures measurement traceability over 100-year product lifetime without battery backup. | Use Scenario: Holding user-defined network settings (IP, subnet, gateway), display brightness, and alarm thresholds in HVAC controllers. IC Role / Device Role / Timing Role: Persistent configuration store updated infrequently but read at every boot; accessed synchronously over I²C at ≤400 kHz. Use Value: Enables field customization without firmware reflash; supports 1M write cycles for >10 years of daily parameter edits. |
| Smart Energy Meter Firmware Parameters | Medical Device Usage Log Archiving |
Use Scenario: Recording tariff schedules, demand-response event timestamps, and metering register deltas in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: High-reliability data logger interfaced to metrology SoC; writes timestamped entries in 16-byte pages during billing intervals. Use Value: Guarantees 100-year data integrity for regulatory audit trails; withstands 1M+ write cycles across 20+ year service life. | Use Scenario: Capturing usage counts, self-test results, and error codes in portable infusion pumps and diagnostic handhelds. IC Role / Device Role / Timing Role: Tamper-resistant event log buffer; writes critical diagnostics on power-down or fault detection via interrupt-driven I²C transaction. Use Value: Meets IEC 62304 Class B software safety requirements through deterministic write timing and hardware WP lock during clinical operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C08D-SSHM-T | Same 8K-bit capacity, SOIC-8, 1.7–5.5 V range; newer revision with enhanced ESD rating (4 kV HBM) and tighter tAA (0.55 µs max at 5 V) | Preferred for new designs requiring higher I/O robustness and faster read access in medical or automotive-adjacent equipment | Select AT24C08D-SSHM-T when upgrading for improved noise immunity and reduced read latency; pinout and firmware identical |
| M24C08-RMN6TP | 8K-bit, SOIC-8, 1.8–5.5 V; STMicroelectronics part with 1 MHz I²C, but uses different device address mapping (A0/A1 active) and lacks dedicated WP pin (relies on software lock) | Suitable for cost-sensitive consumer applications where hardware write protection is not mandatory and address flexibility is needed | Choose M24C08-RMN6TP only if A0/A1 address pins are required and WP functionality can be omitted or implemented externally |
Compared with AT24C08BN-SH-T, AT24C08D-SSHM-T offers superior ESD tolerance and faster read timing with zero layout change, while M24C08-RMN6TP trades hardware WP and fixed A2-only addressing for broader address configurability - making the original AT24C08BN-SH-T optimal for industrial systems prioritizing data integrity and hardware-enforced write safety.
Availability
AT24C08BN-SH-T is available at Aetrix Electronics and suitable for industrial sensor calibration storage, embedded system configuration retention, and smart energy meter firmware parameters requiring stable component supply across extended production lifecycles.
Supply support for AT24C08BN-SH-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 devices, and nonvolatile memory solutions, with broad industrial and automotive qualification coverage.
The AT24C08B series belongs to Microchip's legacy serial EEPROM product line, designed specifically for reliable, low-power, byte-addressable nonvolatile storage in space-constrained embedded systems operating across wide voltage and temperature ranges.
FAQ
What is the memory organization of the AT24C08BN-SH-T?
The AT24C08BN-SH-T contains 8192 bits of EEPROM memory organized as 1024 words × 8 bits. It is internally structured into 64 pages of 16 bytes each, requiring a 10-bit data word address for random access. This layout enables efficient page writes and supports both byte and sequential read operations without address rollover within a page.
Does the AT24C08BN-SH-T support I²C standard-mode and fast-mode speeds?
Yes, the AT24C08BN-SH-T supports 400 kHz I²C fast-mode operation at 1.8 V, 2.5 V, and 2.7 V supply voltages, and 1 MHz standard-mode operation at 5.0 V. Its AC characteristics are fully characterized across this range, including tLOW, tHIGH, and tBUF timing parameters - ensuring interoperability with standard I²C masters without additional timing margining.
How is device addressing configured on the AT24C08BN-SH-T?
The AT24C08BN-SH-T uses only the A2 pin for hardware device addressing; A0 and A1 are no-connects. With A2 grounded, the device responds to I²C address 0x50; with A2 pulled high, it responds to 0x51. This allows two AT24C08BN-SH-T devices on the same bus. The fixed 4-bit prefix "1010" and R/W bit complete the 8-bit address byte.
What is the function of the WP pin on the AT24C08BN-SH-T?
The WP (Write Protect) pin on the AT24C08BN-SH-T is an active-high hardware control that disables all write operations to the entire memory array when driven to VCC. When WP is low or floating (with internal pull-down), normal read/write functions operate. This provides fail-safe protection against unintended writes during power transients or firmware faults - a feature not replicated in software-only lock schemes.
Is the AT24C08BN-SH-T compatible with 1.8 V microcontrollers?
Yes, the AT24C08BN-SH-T is fully specified for 1.8 V operation, supporting I²C communication at 400 kHz, 1 µA typical standby current (ISB1), and valid logic thresholds (VIH ≥ 0.7×VCC, VIL ≤ 0.3×VCC). Its Schmitt-trigger inputs and noise filtering ensure reliable operation in mixed-voltage systems where the host MCU runs at 1.8 V while peripherals use higher rails.
AT24C08BN-SH-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 8-SOIC
AT24C08BN-SH-T FAQ
1.How can I place an order for AT24C08BN-SH-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C08BN-SH-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 AT24C08BN-SH-T reliable?
The price and inventory of AT24C08BN-SH-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C08BN-SH-T is usually 5 days.
3.What payment methods are accepted for AT24C08BN-SH-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C08BN-SH-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C08BN-SH-T?
AT24C08BN-SH-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C08BN-SH-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 AT24C08BN-SH-T?
For technical support, including AT24C08BN-SH-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C08BN-SH-T requirements.
6.How does Aetrix verify that AT24C08BN-SH-T is sourced from the original manufacturer or authorized distributors?
All AT24C08BN-SH-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 AT24C08BN-SH-T meets industry standards.
7.What is the process for return or replacement of AT24C08BN-SH-T?
All AT24C08BN-SH-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C08BN-SH-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 AT24C08BN-SH-T part is unused and in its original packaging.
Return procedure for AT24C08BN-SH-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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