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Microchip Technology AT24C01BN-SH-B
- Part No.:
- AT24C01BN-SH-B
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C01BN-SH-B.pdf
- Description:
- IC EEPROM 1KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,538
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Product details
Overview
AT24C01BN-SH-B from Microchip Technology is a 1K-bit (128 × 8) two-wire serial EEPROM with 1.8V to 5.5V operation, 400 kHz/1 MHz I²C interface speed, hardware write protection via WP pin, and 1 million write cycles endurance. It is used in industrial sensor calibration storage, embedded system configuration retention, and power-fail-safe parameter backup.
For engineers reviewing the AT24C01BN-SH-B datasheet, AT24C01BN-SH-B pinout, AT24C01BN-SH-B application, or AT24C01BN-SH-B equivalent, key selection criteria include VCC voltage range compatibility, SCL clock frequency support at 1.8V/5V, WP pin functionality for hardware-level data lock, page write timing (5 ms max), and SOIC-8 package mechanical fit.
Technical Context
The AT24C01BN-SH-B implements a standard I²C-compatible two-wire interface with Schmitt-triggered, noise-filtered SCL and SDA inputs. Addressing uses three hardware-configurable pins (A0–A2), enabling up to eight devices on one bus. Internal logic includes auto-incrementing address counter and self-timed write cycle control.
It operates across –40°C to +85°C with supply current as low as 0.6 µA standby (VCC = 1.8V) and supports partial page writes within its 8-byte page boundary. Data retention is guaranteed for 100 years under specified conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 words × 8 bits); sufficient for small firmware flags, calibration coefficients, or device ID storage |
| Interface | Two-wire I²C-compatible; requires only SCL and SDA lines plus pull-ups - minimal GPIO overhead |
| Write Speed | Max 5 ms per byte/page write; enables deterministic timeout handling in host firmware |
| Voltage Range | 1.8V to 5.5V; interoperable with 1.8V logic systems and legacy 5V microcontrollers |
| Endurance | 1 million write cycles; supports frequent recalibration or logging in field-deployed equipment |
| Data Retention | 100 years at +25°C; ensures long-term reliability without battery-backed SRAM |
| Operating Temp | –40°C to +85°C; qualified for industrial ambient environments without derating |
Pinout & Package
AT24C01BN-SH-B is packaged in an 8-lead JEDEC SOIC (package code 8S1), 3.9 mm body width, 1.27 mm lead pitch, NiPdAu lead finish. Pin 1 is marked by a beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardware-selectable I²C slave address (up to 8 devices on same bus) |
| SDA | Serial Data I/O | Bidirectional open-drain line; requires external pull-up; carries address, command, and data |
| SCL | Serial Clock Input | Master-generated clock; Schmitt-triggered for noise immunity in noisy industrial settings |
| WP | Write Protect Input | Active-high hardware lock: disables all write operations when driven high |
| GND | Ground Reference | Signal and power return path; must be low-impedance for stable I²C signaling |
| VCC | Power Supply | Single supply input (1.8–5.5V); no separate logic or core voltage required |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-triggered inputs | Enables robust operation in electrically noisy environments (e.g., motor drives, PLCs) without external filtering |
| 8-byte page write mode | Reduces total write time vs. byte-by-byte writes; allows burst programming of calibration tables |
| Self-timed internal write cycle | Eliminates need for host-controlled write delay; simplifies firmware with ACK polling or fixed timeout |
| Lead-free/halogen-free construction | Complies with RoHS Directive 2011/65/EU and JEDEC JS709C; suitable for global industrial shipments |
| Low standby current (0.6 µA @ 1.8V) | Extends battery life in portable or energy-harvesting applications where EEPROM remains powered |
Applications
| Industrial Sensor Calibration | Embedded Configuration Storage |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain values for temperature, pressure, or current sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed during power-on initialization via I²C. Use Value: Eliminates manual potentiometer adjustment; enables automated calibration traceability and field re-trimming. | Use Scenario: Holding user-defined settings (e.g., display brightness, communication baud rate, alarm thresholds) in smart thermostats. IC Role / Device Role / Timing Role: Persistent configuration memory updated infrequently but read at every boot. Use Value: Survives power loss and firmware updates; avoids reliance on volatile RAM or costly FRAM. |
| Power-Fail Event Logging | Medical Device Parameter Backup |
Use Scenario: Recording last-known operational state (e.g., motor position, valve status) before unexpected AC dropout in HVAC actuators. IC Role / Device Role / Timing Role: Fast-write-capable nonvolatile scratchpad triggered by brown-out detection circuitry. Use Value: Enables safe restart from known state; meets IEC 61000-4-11 immunity requirements for transient ride-through. | Use Scenario: Archiving patient-specific therapy parameters (e.g., infusion rate limits, alarm delays) in portable insulin pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage with hardware write protection enabled during normal operation. Use Value: Meets FDA guidance on data integrity (21 CFR Part 11) through WP pin-based locking and 100-year retention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics M24C01-RMN6TP | Same 1K-bit size, SOIC-8, 1.8–5.5V, but rated for –40°C to +105°C; slightly higher ISB (1.5 µA @ 1.8V) | Preferred for extended temperature automotive body electronics where >85°C ambient occurs | Select if operating above +85°C is required; otherwise AT24C01BN-SH-B offers tighter ISB and Microchip's long-term supply commitment |
| ON Semiconductor CAT24C01HU4IGT3 | Identical 1K-bit, SOIC-8, 1.8–5.5V, but uses different internal ECC scheme; WP pin functionally identical | Valid drop-in alternative where second-source qualification is mandated by procurement policy | Choose when dual-sourcing is contractually required; pinout, timing, and software interface are fully compatible |
Compared with M24C01-RMN6TP and CAT24C01HU4IGT3, the AT24C01BN-SH-B provides lower standby current at 1.8V and is optimized for industrial-grade longevity (1M cycles, 100-year retention), while maintaining full I²C protocol compliance and SOIC-8 footprint compatibility.
Availability
AT24C01BN-SH-B is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded configuration storage, and power-fail event logging requiring stable component supply and long-term lifecycle support.
Supply support for AT24C01BN-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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with emphasis on industrial, automotive, and aerospace reliability standards.
The AT24C01BN-SH-B belongs to Microchip's AT24Cxx family of I²C-compatible serial EEPROMs, designed specifically for low-power, space-constrained embedded systems needing robust, long-life nonvolatile storage without complex interface logic.
FAQ
What is the maximum I²C clock frequency supported by AT24C01BN-SH-B at 1.8V?
The AT24C01BN-SH-B supports up to 400 kHz I²C clock frequency when operated at 1.8V, 2.5V, or 2.7V. At 5.0V, it supports up to 1 MHz. These values are specified in the AC Characteristics table and validated across the full industrial temperature range (–40°C to +85°C). The AT24C01BN-SH-B maintains reliable communication within these limits without requiring external clock dividers or protocol adaptation.
Does AT24C01BN-SH-B require external pull-up resistors on SDA and SCL lines?
Yes, AT24C01BN-SH-B requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. Typical values range from 1.8 kΩ (for 1 MHz at 5V) to 10 kΩ (for 400 kHz at 1.8V), depending on bus capacitance and speed. The AT24C01BN-SH-B datasheet specifies maximum bus capacitance (400 pF) and rise/fall time constraints that guide resistor selection.
How does the WP pin function on AT24C01BN-SH-B?
The WP (Write Protect) pin on AT24C01BN-SH-B is an active-high hardware lock: when pulled high (≥0.7×VCC), it disables all write operations including byte, page, and write-enable instructions. When low or floating (with internal pull-down), writes are permitted. This feature allows permanent or conditional protection of stored data without firmware intervention - a critical safety mechanism in the AT24C01BN-SH-B for mission-critical configuration storage.
What package type is used for AT24C01BN-SH-B?
AT24C01BN-SH-B uses an 8-lead JEDEC SOIC package (package code 8S1), 0.150" wide, with NiPdAu lead finish. Its dimensions conform to MS-012, with 1.27 mm lead pitch and 3.9 mm body width. This package is compatible with standard SOIC-8 footprints and reflow profiles, and is distinct from TSSOP, MLP, or dBGA2 variants in the same AT24C01B family.
Is AT24C01BN-SH-B suitable for automotive applications?
The AT24C01BN-SH-B is qualified for industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. While it may function in some automotive cabin or body applications, Microchip does not certify AT24C01BN-SH-B for under-hood or safety-critical automotive use. For such roles, engineers should select AEC-Q100–qualified alternatives like the AT24C01C-SSHM-T. The AT24C01BN-SH-B is intended for industrial, commercial, and consumer systems meeting IEC 61000-4-x immunity standards.
AT24C01BN-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:
- 1Kbit
- Memory Organization:
- 128 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
AT24C01BN-SH-B FAQ
1.How can I place an order for AT24C01BN-SH-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C01BN-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 AT24C01BN-SH-B reliable?
The price and inventory of AT24C01BN-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 AT24C01BN-SH-B is usually 5 days.
3.What payment methods are accepted for AT24C01BN-SH-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C01BN-SH-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C01BN-SH-B?
AT24C01BN-SH-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C01BN-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 AT24C01BN-SH-B?
For technical support, including AT24C01BN-SH-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C01BN-SH-B requirements.
6.How does Aetrix verify that AT24C01BN-SH-B is sourced from the original manufacturer or authorized distributors?
All AT24C01BN-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 AT24C01BN-SH-B meets industry standards.
7.What is the process for return or replacement of AT24C01BN-SH-B?
All AT24C01BN-SH-B units undergo pre-shipment inspection (PSI). If there is an issue with AT24C01BN-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 AT24C01BN-SH-B part is unused and in its original packaging.
Return procedure for AT24C01BN-SH-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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