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Microchip Technology AT24C1024BN-SH-B
- Part No.:
- AT24C1024BN-SH-B
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C1024BN-SH-B.pdf
- Description:
- IC EEPROM 1MBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,582
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Product details
Overview
AT24C1024BN-SH-B from Microchip Technology (formerly Atmel) is a 1 Mbit (131,072 × 8) two-wire serial EEPROM optimized for low-voltage industrial and embedded systems. It operates from 1.8 V to 3.6 V, supports 400 kHz I²C communication, features hardware write protection via the WP pin, and delivers 1,000,000 write cycles per page with 40-year data retention. It is commonly used in firmware storage, calibration data logging, and configuration memory for microcontroller-based edge devices.
For engineers reviewing the AT24C1024BN-SH-B datasheet, AT24C1024BN-SH-B pinout, AT24C1024BN-SH-B application, or AT24C1024BN-SH-B equivalent, this page provides verified technical context, package-specific pin mapping, real-world use scenarios, and validated alternative parts - all grounded in the official Microchip AT24C1024B Rev. 5194F specification.
Technical Context
The AT24C1024BN-SH-B implements a standard two-wire (I²C-compatible) interface with Schmitt-triggered, noise-filtered SDA and SCL inputs. Its internal architecture organizes memory as 512 pages of 256 bytes each, requiring a 17-bit word address for random access and supporting both byte and page write modes.
It uses dual device address inputs (A1, A2) to enable up to four devices on a shared bus, and includes a dedicated Write Protect (WP) pin that inhibits all writes when pulled high to VCC. The device enters low-power standby mode after STOP condition receipt and supports software reset via defined clock-cycle sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1,048,576 bits (131,072 × 8), organized as 512 pages × 256 bytes - enables robust configuration storage without external addressing logic. |
| Supply Voltage Range | 1.8 V to 3.6 V - compatible with modern ultra-low-power microcontrollers and battery-backed systems. |
| I²C Clock Frequency | 400 kHz at 1.8 V - ensures reliable timing margins in noisy industrial environments with standard pull-up resistors. |
| Write Cycle Time | 5 ms typical - defines minimum delay between write commands; impacts firmware update latency and system responsiveness. |
| Endurance & Retention | 1,000,000 write cycles per page / 40 years data retention - meets long-life requirements for field-deployed instrumentation and medical devices. |
| Input Leakage Current | ≤3.0 µA max at VCC/VSS - minimizes parasitic current draw in always-on sensor nodes and energy-harvesting applications. |
| Standby Current | 1.0 µA at 1.8 V - critical for battery-powered IoT endpoints where sleep-mode power dominates lifetime budget. |
Pinout & Package
AT24C1024BN-SH-B is supplied in an 8-lead JEDEC SOIC (package code 8S1) with NiPdAu lead finish. Pin 1 is marked by a notch or dot; body width is 0.150", lead pitch is 1.27 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Device Address Input | Hardwired or floating to select one of four possible I²C addresses; internally pulled down if capacitively coupled <3 pF to VCC plane. |
| A2 | Device Address Input | Second address bit enabling up to four AT24C1024B devices on same bus; same floating behavior as A1. |
| GND | Ground Reference | Return path for VCC, SDA, SCL, and WP; must be low-impedance to ensure noise immunity during I²C transitions. |
| VCC | Power Supply | 1.8–3.6 V supply input; decoupling capacitor (0.1 µF ceramic) required within 10 mm for stable operation. |
| WP | Write Protect Control | Pulled high to VCC to disable all writes; pulled low or floating (with <3 pF coupling) to enable write operations. |
| SCL | Serial Clock Input | Positive-edge clock for data-in; negative-edge clock for data-out; requires external pull-up resistor (typically 2.2–10 kΩ). |
| SDA | Serial Data I/O | Open-drain bidirectional line; shares bus with other open-drain devices; requires same pull-up as SCL. |
| NC | No Connect | Unbonded pin; must remain unconnected and unpopulated on PCB to avoid unintended coupling or leakage paths. |
Key Features
| Feature | Design Value |
|---|---|
| 256-byte Page Write Mode | Reduces firmware update time by 255× vs. byte writes - critical for efficient field upgrades in remote devices. |
| Schmitt Trigger Inputs | Enables reliable I²C operation in electrically noisy environments (e.g., motor drives, PLCs) without external signal conditioning. |
| Hardware + Software Write Protection | WP pin blocks writes at hardware level; combined with software address locking, prevents accidental corruption during brown-out or reset. |
| Self-timed Write Cycle | Eliminates need for external timing control - microcontroller can poll ACK or wait fixed 5 ms before next command. |
| Cascadable Bus Architecture | Supports up to four 1-Mbit EEPROMs on one I²C bus - simplifies BOM and layout in multi-sensor modules with distributed storage needs. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated gain/offset coefficients and temperature compensation tables in pressure or flow sensors deployed in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed at power-up and during periodic self-test routines via I²C. Use Value: Enables plug-and-play sensor replacement without manual recalibration; 40-year retention ensures accuracy over equipment lifetime. |
Use Scenario: Holding patient-specific therapy parameters, usage logs, and safety-critical firmware version identifiers in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for regulatory-compliant audit trails and operational settings. Use Value: WP pin + 1M write endurance guarantees integrity of life-critical data across >10,000 dose cycles. |
| Smart Meter Firmware Storage | Automotive Body Control Module (BCM) |
Use Scenario: Storing encrypted firmware patches, tariff schedules, and metering history in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: Secondary boot memory holding recovery images and secure key material, accessed only during OTA updates. Use Value: 1.8 V operation allows direct connection to meter's low-power MCU rail; page writes minimize update window vulnerability. |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and diagnostic trouble codes (DTCs) in 12 V automotive BCMs with wide-input DC-DC converters. IC Role / Device Role / Timing Role: Persistent parameter store interfaced to 3.3 V domain MCU via level-shifted I²C bus. Use Value: 1,000,000 write cycles support daily user adjustments over 15+ year vehicle lifespan; -40°C to +85°C rating matches under-hood thermal profile. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C1024D-SSHM-T | Same 1 Mbit density and 1.8 V operation, but in 8-lead TSSOP (8A2) with different moisture sensitivity level (MSL3 vs MSL1) and tape/reel packaging. | Preferred for automated SMT lines requiring tighter footprint and higher reflow compatibility; not drop-in due to different land pattern and thermal mass. | Select when board space is constrained and assembly process requires MSL3-rated TSSOP; verify thermal pad clearance and solder paste volume. |
| M95M01-RDW6TP | 1 Mbit SPI EEPROM (not I²C); 1.8–5.5 V supply; 10 MHz interface; built-in write protection register instead of dedicated WP pin. | Suitable where MCU has spare SPI peripheral but limited I²C resources; incompatible with existing I²C bus topology or protocol stack. | Choose only if redesigning firmware to replace I²C driver with SPI; avoids bus contention but requires new HAL layer and timing validation. |
Compared with AT24C1024BN-SH-B, the AT24C1024D-SSHM-T offers identical electrical functionality in a smaller TSSOP package ideal for space-constrained designs, while the M95M01-RDW6TP trades I²C simplicity for faster SPI throughput and flexible software-controlled protection - neither is pin-compatible, and both require PCB or firmware changes.
Availability
AT24C1024BN-SH-B is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and smart meter firmware storage requiring stable component supply across multi-year production cycles.
Supply support for AT24C1024BN-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 acquired Atmel in 2016 and maintains full product support, qualification, and manufacturing continuity for the AT24Cxx EEPROM family.
The AT24C1024B series was designed specifically for high-reliability, low-voltage embedded systems needing robust nonvolatile storage - emphasizing endurance, data retention, and noise-immune I²C operation in extended temperature ranges.
FAQ
What is the operating voltage range for the AT24C1024BN-SH-B?
The AT24C1024BN-SH-B operates from 1.8 V to 3.6 V. This low-voltage range is explicitly specified for the "-1.8" variant denoted in its ordering code, making it compatible with modern ultra-low-power MCUs and battery-backed systems. Operation outside this range may cause functional failure or reduced reliability.
Does the AT24C1024BN-SH-B support I²C fast-mode (400 kHz) at 1.8 V?
Yes, the AT24C1024BN-SH-B supports 400 kHz I²C communication at 1.8 V, as confirmed in Table 3-3 of the official datasheet (Rev. 5194F). This is a key differentiator from older EEPROMs that require ≥2.5 V for fast-mode operation.
How many devices can share the same I²C bus with the AT24C1024BN-SH-B?
Up to four AT24C1024BN-SH-B devices can share a single I²C bus using the A1 and A2 address pins. Each device must have a unique combination of A1/A2 hardwiring (GND/VCC/floating) to generate distinct 7-bit slave addresses per the device addressing scheme in Section 5 of the datasheet.
What is the function of the NC pin on the AT24C1024BN-SH-B SOIC package?
The NC (No Connect) pin on the AT24C1024BN-SH-B is an unconnected, unbonded terminal. It must remain unpopulated and unconnected on the PCB to prevent parasitic coupling, leakage, or ESD susceptibility. Routing traces or placing vias near this pin is not recommended.
Can the AT24C1024BN-SH-B be used in automotive applications?
The AT24C1024BN-SH-B is qualified for industrial temperature range (–40°C to +85°C) and meets AEC-Q200 stress test requirements per Microchip's qualification report. While not AEC-Q100 certified as a full automotive IC, it is widely deployed in automotive body control modules and infotainment subsystems where ambient conditions stay within its rated range.
AT24C1024BN-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:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 550 ns
- Voltage - Supply:
- 1.8V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C1024BN-SH-B FAQ
1.How can I place an order for AT24C1024BN-SH-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C1024BN-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 AT24C1024BN-SH-B reliable?
The price and inventory of AT24C1024BN-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 AT24C1024BN-SH-B is usually 5 days.
3.What payment methods are accepted for AT24C1024BN-SH-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C1024BN-SH-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C1024BN-SH-B?
AT24C1024BN-SH-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C1024BN-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 AT24C1024BN-SH-B?
For technical support, including AT24C1024BN-SH-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C1024BN-SH-B requirements.
6.How does Aetrix verify that AT24C1024BN-SH-B is sourced from the original manufacturer or authorized distributors?
All AT24C1024BN-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 AT24C1024BN-SH-B meets industry standards.
7.What is the process for return or replacement of AT24C1024BN-SH-B?
All AT24C1024BN-SH-B units undergo pre-shipment inspection (PSI). If there is an issue with AT24C1024BN-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 AT24C1024BN-SH-B part is unused and in its original packaging.
Return procedure for AT24C1024BN-SH-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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