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Microchip Technology AT24C08BN-SH-B
- Part No.:
- AT24C08BN-SH-B
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C08BN-SH-B.pdf
- Description:
- IC EEPROM 8KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,611
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Product details
Overview
AT24C08BN-SH-B from Microchip Technology (formerly Atmel) 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, and hardware write protection via WP pin. It supports 16-byte page writes, features Schmitt-trigger inputs for noise immunity, and delivers 1 million write cycles with 100-year data retention - used in industrial sensor calibration storage, embedded configuration memory, and power-meter firmware parameter backup.
For engineers reviewing the AT24C08BN-SH-B datasheet, AT24C08BN-SH-B pinout, AT24C08BN-SH-B application, or AT24C08BN-SH-B equivalent, key selection criteria include its SOIC-8 package compatibility, 1.8V low-voltage operation, 400 kHz I²C timing at 1.8V, WP pin hardware lock, and 16-byte page write capability for efficient firmware updates.
Technical Context
The AT24C08BN-SH-B implements a standard two-wire (I²C-compatible) serial interface with open-drain SDA and active-high SCL, supporting bidirectional data transfer and ACK/NACK handshaking. Its internal address counter enables current-address, random-address, and sequential read modes.
It uses hardware address pins A2 only (A0 and A1 are no-connect), allowing up to two devices on a single bus. The device incorporates an internal high-voltage pump and timing circuit for self-timed 5 ms max write cycles, with automatic write-cycle inhibition during active SCL/SDA transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8192 bits (1024 × 8 organization), enabling storage of 1 KB of persistent configuration or calibration data |
| Interface | Two-wire (I²C-compatible) serial interface with 400 kHz max clock at 1.8V - ensures interoperability with low-power microcontrollers |
| Supply Voltage | 1.8 V to 5.5 V - supports direct integration into 1.8V, 2.5V, 2.7V, 3.3V, and 5V systems without level-shifting |
| Write Protection | Hardware WP pin: grounded for full read/write access; pulled to VCC to lock entire memory array - prevents accidental overwrites during power-up/down |
| Endurance & Retention | 1 million write cycles and 100 years data retention - validated for long-life industrial deployments requiring infrequent but critical updates |
| Page Write Size | 16-byte page write mode - reduces I²C transaction overhead versus byte-write, accelerating bulk parameter saves |
| Operating Temp | –40°C to +85°C industrial range - qualified for use in metering, PLCs, and automotive body-control modules |
Pinout & Package
AT24C08BN-SH-B is supplied in an 8-lead JEDEC SOIC (package code 8S1), measuring 4.9 mm × 3.9 mm × 1.75 mm, with NiPdAu lead finish and lead-free/halogen-free compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A0) | No-connect (NC) | Internally unused; must be tied to GND or left floating per datasheet - not part of device addressing |
| 2 (A1) | No-connect (NC) | Internally unused; must be tied to GND or left floating - no effect on communication or addressing |
| 3 (A2) | Device Address Input | Hardwired address bit: determines one of two possible I²C addresses (10101xx or 10100xx) on shared bus |
| 4 (GND) | Ground Reference | Primary return path for VCC and signal currents; requires low-impedance PCB connection to minimize noise coupling |
| 5 (SDA) | Serial Data I/O | Open-drain bidirectional line - requires external pull-up resistor (typically 2.2–10 kΩ) to VCC for proper I²C signaling |
| 6 (SCL) | Serial Clock Input | Input-only clock line - driven by master; rising edge samples data, falling edge drives data - defines I²C timing compliance |
| 7 (WP) | Write Protect Control | Active-high hardware lock: logic high disables all write operations including page and byte writes - immune to software glitches |
| 8 (VCC) | Power Supply | Single supply input (1.8–5.5 V); decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin for stable operation |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Enables robust noise immunity on SCL/SDA lines in electrically noisy industrial environments (e.g., motor drives, PLC backplanes) |
| Self-timed write cycle | Eliminates need for external write-complete polling delay - host can issue next command after 5 ms tWR timeout |
| Partial page writes | Allows writing 1–16 bytes within a page boundary without erasing adjacent locations - preserves integrity of unrelated configuration fields |
| 10-bit internal address counter | Supports full 1024-word random access and seamless wraparound during sequential reads across 64 pages |
| Low standby current | Max 4.0 µA at 2.7V - minimizes battery drain in always-on IoT edge nodes and portable instrumentation |
Applications
| Smart Energy Metering | Industrial PLC Configuration |
|---|---|
Use Scenario: Storing tariff schedules, pulse-count calibration coefficients, and tamper-event logs in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed write integrity during brown-out conditions via WP pin lock. Use Value: Enables field-upgradable meter firmware parameters without risk of corruption during grid instability or power cycling. | Use Scenario: Holding I/O mapping tables, PID tuning constants, and alarm thresholds in modular programmable logic controllers. IC Role / Device Role / Timing Role: Persistent parameter store accessed via microcontroller's I²C peripheral during boot and runtime reconfiguration. Use Value: Eliminates need for external backup batteries or supercapacitors while maintaining >100-year data retention under thermal stress. |
| Automotive Body Control Module | Medical Diagnostic Equipment |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and door-lock configuration in 12V vehicle subsystems with 1.8V logic domains. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfaced directly to 1.8V MCU I²C port - no level shifter required. Use Value: Reduces BOM count and PCB area vs. legacy 5V EEPROMs, while meeting AEC-Q200 temperature and reliability requirements. | Use Scenario: Archiving calibration offsets, sensor linearization tables, and user-defined test protocols in portable ultrasound and ECG analyzers. IC Role / Device Role / Timing Role: Secure, WP-protected storage for FDA-regulated device settings - write-protection prevents unauthorized parameter changes. Use Value: Supports audit-trail compliance by ensuring calibration data remains immutable between certified service intervals. |
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 and SOIC-8 package, but rated for extended temp (–40°C to +125°C) and higher 1 MHz I²C speed at 5V | Preferred for under-hood automotive or high-temp industrial enclosures where ambient exceeds +85°C | Select when extended temperature range or faster 5V write throughput is required; otherwise AT24C08BN-SH-B offers cost-optimized industrial-grade performance |
| M24C08-RMN6TP | 8K-bit EEPROM in same SOIC-8 package, but with 1 MHz I²C at 2.5–5.5V and different WP logic (active-low) | Requires inverted WP control signal and lacks 1.8V operation - unsuitable for ultra-low-power designs | Choose only if existing design already uses M24C08-RMN6TP footprint and timing; not drop-in due to voltage and WP polarity mismatch |
Compared with AT24C08D-SSHM-T, AT24C08BN-SH-B trades extended temperature and higher 5V speed for lower cost and proven 1.8V compatibility; versus M24C08-RMN6TP, it provides true 1.8V operation and active-high WP but requires layout adaptation for pinout and control logic.
Availability
AT24C08BN-SH-B is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, automotive body control modules, and medical diagnostic equipment requiring stable component supply across multi-year production cycles.
Supply support for AT24C08BN-SH-B 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, FPGA, and memory solutions, with broad industrial and automotive qualification programs.
The AT24C08BN-SH-B belongs to Microchip's legacy Atmel two-wire serial EEPROM product line, designed specifically for reliable, low-voltage nonvolatile data storage in space-constrained embedded systems.
FAQ
What is the maximum I²C clock frequency supported by AT24C08BN-SH-B at 1.8V?
AT24C08BN-SH-B 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. At 5.0V, the maximum clock frequency increases to 1 MHz. The 400 kHz limit at low voltage ensures timing margin for rise/fall times and noise immunity in battery-powered or mixed-voltage systems.
Does AT24C08BN-SH-B require external pull-up resistors on SDA and SCL lines?
Yes, AT24C08BN-SH-B requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is input-only. 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. Pull-ups must connect to the same VCC domain as the AT24C08BN-SH-B supply.
How many devices can share the same I²C bus with AT24C08BN-SH-B?
Up to two AT24C08BN-SH-B devices can share a single I²C bus. This is because only the A2 pin is used for hardware addressing (A0 and A1 are no-connect), providing one configurable address bit. The resulting device addresses are 10100xx (A2 = 0) and 10101xx (A2 = 1), where xx are R/W and P bits. Bus arbitration and collision detection follow standard I²C protocol.
What happens to the AT24C08BN-SH-B WP pin when tied to VCC?
When the WP pin of AT24C08BN-SH-B is tied to VCC, the entire memory array is write-protected - all write operations (byte, page, and write-enable commands) are inhibited. Reads remain fully functional. This hardware lock is active immediately and persists regardless of I²C command state, providing immunity to firmware bugs or bus contention errors that could corrupt stored data.
Is AT24C08BN-SH-B compatible with standard I²C protocol and controllers?
Yes, AT24C08BN-SH-B is fully compliant with the standard I²C protocol specification, including START/STOP conditions, 7-bit addressing, ACK/NACK handshaking, and repeated START. It interfaces seamlessly with any I²C master - including ARM Cortex-M, PIC, ESP32, and Linux-based SoCs - without custom drivers. Its timing parameters (tBUF, tHD.STA, tSU.STA, etc.) meet I²C Standard-Mode and Fast-Mode requirements at rated voltages.
AT24C08BN-SH-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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-B FAQ
1.How can I place an order for AT24C08BN-SH-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C08BN-SH-B 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-B reliable?
The price and inventory of AT24C08BN-SH-B 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-B is usually 5 days.
3.What payment methods are accepted for AT24C08BN-SH-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C08BN-SH-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C08BN-SH-B?
AT24C08BN-SH-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C08BN-SH-B 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-B?
For technical support, including AT24C08BN-SH-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C08BN-SH-B requirements.
6.How does Aetrix verify that AT24C08BN-SH-B is sourced from the original manufacturer or authorized distributors?
All AT24C08BN-SH-B 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-B meets industry standards.
7.What is the process for return or replacement of AT24C08BN-SH-B?
All AT24C08BN-SH-B units undergo pre-shipment inspection (PSI). If there is an issue with AT24C08BN-SH-B, 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-B part is unused and in its original packaging.
Return procedure for AT24C08BN-SH-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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