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Microchip Technology AT24CM01-SHD-B
- Part No.:
- AT24CM01-SHD-B
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT24CM01-SHD-B.pdf
- Description:
- IC EEPROM 1MBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:633
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Product details
Overview
AT24CM01-SHD-B from Microchip Technology is a 1-Mbit I²C-compatible serial EEPROM organized as 131,072 × 8 bits, operating from 1.7V to 5.5V with industrial temperature range (−40°C to +85°C), Fast Mode Plus support up to 1 MHz at ≥2.5V, and hardware write protection via dedicated WP pin - deployed in embedded systems for firmware parameter storage, calibration data retention, and configuration backup.
For engineers reviewing the AT24CM01-SHD-B datasheet, AT24CM01-SHD-B pinout, AT24CM01-SHD-B application, or AT24CM01-SHD-B equivalent, key selection criteria include voltage flexibility (1.7–5.5V), page-write capability (256-byte pages), ultra-low standby current (6 µA max), built-in error detection/correction, and compatibility with multi-device I²C bus topologies using A1/A2 address inputs.
Technical Context
The AT24CM01-SHD-B implements a two-wire I²C slave interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain bidirectional data transfer protocol. It supports Standard (100 kHz), Fast (400 kHz), and Fast Mode Plus (1 MHz) speeds across overlapping VCC ranges.
Internally, it features a 512-page × 256-byte memory architecture with hardware address inputs A1/A2 enabling up to four devices on one bus, plus a dedicated WP pin that disables all writes when pulled high. Power-on reset (POR) and software reset ensure robust initialization and bus recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Mbit (131,072 × 8), supporting firmware/config storage without external addressing logic |
| VCC range | 1.7V to 5.5V - enables direct interfacing with 1.8V, 2.5V, 3.3V, and 5V microcontrollers |
| I²C speed modes | 100 kHz (1.7–5.5V), 400 kHz (1.7–5.5V), 1 MHz FM+ (2.5–5.5V) - scalable timing for latency-sensitive reads |
| Write endurance | 1,000,000 cycles - suitable for frequent calibration or logging applications |
| Data retention | 100 years at 55°C - ensures long-term reliability in unattended industrial deployments |
| Standby current | 6 µA max at 5.5V - minimizes battery drain in always-on edge sensors and IoT nodes |
| Page write size | 256 bytes - reduces write time vs. byte-by-byte; partial page writes supported |
| Operating temp | −40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor equipment |
Pinout & Package
AT24CM01-SHD-B is supplied in an 8-lead SOIC package (SHD = SOIC, 150 mil width). Pin functions are validated per Microchip datasheet 20006170A, with NC (pin 1), A1 (pin 2), A2 (pin 3), GND (pin 4), SDA (pin 5), SCL (pin 6), WP (pin 7), and VCC (pin 8).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| NC | No-connect | Unused internal node; must be left floating or tied to GND - no electrical function |
| A1, A2 | Hardware device address inputs | Set slave address bits (A2,A1); enable up to four AT24CM01 devices on same I²C bus |
| GND | Power ground reference | Return path for VCC and signal currents; must connect to system ground plane |
| SDA | Bidirectional serial data line | Open-drain I²C data line requiring external pull-up (≤10 kΩ); supports ACK/NACK handshake |
| SCL | Serial clock input | Master-generated clock; rising edge latches input, falling edge outputs data; filtered for noise immunity |
| WP | Hardware write-protect control | Pulled high → full-array write inhibition; pulled low → normal write access; internally pulled down if floating |
| VCC | Device power supply | Supplies core logic and EEPROM array; must ramp monotonically at ≤0.1 V/µs during power-up |
Key Features
| Feature | Design Value |
|---|---|
| Built-in error detection and correction | Prevents silent data corruption during read/write; eliminates need for external CRC or redundancy layers |
| Schmitt triggers + input filtering | Rejects >100 ns noise spikes on SDA/SCL - improves bus reliability in EMI-prone motor drives or power supplies |
| Self-timed write cycle ≤5 ms | Guarantees completion without polling overhead; simplifies firmware timing and interrupt handling |
| Green RoHS-compliant packaging | Lead-free, halide-free 8-lead SOIC - meets IPC/JEDEC J-STD-020 reflow profiles and environmental compliance mandates |
| Ultra-low active current (3 mA max) | Enables use behind low-power PMIC rails or coin-cell-supplied subsystems without derating |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and user-adjusted thresholds in pressure or temperature transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent settings accessible over I²C during boot or runtime recalibration. Use Value: Eliminates need for external OTP or battery-backed SRAM; retains data across 100-year field life without maintenance. | Use Scenario: Saving patient-specific therapy parameters (e.g., infusion rate limits, alarm thresholds) in portable insulin pumps or dialysis controllers. IC Role / Device Role / Timing Role: Secure, WP-protected memory for critical safety-critical configuration data accessed only during setup or diagnostics. Use Value: Hardware write-protection prevents accidental overwrite during operation; 1Mbit capacity supports multi-profile storage. |
| Automotive Body Control Module | Smart Energy Metering |
Use Scenario: Recording door lock actuation history, mirror position presets, and lighting scene configurations in vehicle BCMs. IC Role / Device Role / Timing Role: I²C slave storing user preferences and event logs; accessed by MCU during wake-up or diagnostics. Use Value: −40°C to +85°C rating ensures operation under hood or door module thermal stress; 1.7V min VCC supports start-stop battery dips. | Use Scenario: Retaining tariff schedules, metering constants, and tamper-event timestamps in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile memory with WP pin tied to secure MCU GPIO for cryptographic key protection. Use Value: 1,000,000 write cycles withstand daily billing updates; 100-year retention meets utility 20+ year deployment requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C1024-SSHD-T | Same 1-Mbit density, but rated only for 1.8–5.5V; no Fast Mode Plus (1 MHz) support; lower max write endurance (500k cycles) | Lacks FM+ timing - unsuitable for high-throughput logging; not qualified below 1.8V | Select only if 1.8V minimum VCC suffices and 1 MHz bus speed is unnecessary |
| M95M01-RDW6TP | 1-Mbit SPI EEPROM; 2.5–5.5V only; no hardware WP pin; uses SPI interface instead of I²C | Requires SPI-capable MCU; no multi-drop bus support; different command set and timing | Choose only when existing design uses SPI peripherals and I²C bus is unavailable or congested |
Compared with AT24C1024-SSHD-T, the AT24CM01-SHD-B offers broader voltage operation (1.7V min), higher endurance, and FM+ speed - making it superior for battery-powered or noise-sensitive I²C systems. Versus M95M01-RDW6TP, it provides native I²C compatibility, hardware write protection, and simpler two-wire integration at the cost of interface flexibility.
Availability
AT24CM01-SHD-B is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply, long-life data retention, and I²C bus scalability.
Supply support for AT24CM01-SHD-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, FPGA, and memory solutions, with ISO 9001-certified manufacturing and global distribution.
The AT24CM01-SHD-B belongs to Microchip's AT24Cxx family of I²C EEPROMs, designed specifically for robust, low-power, multi-voltage nonvolatile storage in space-constrained industrial and automotive systems.
FAQ
What is the maximum I²C clock frequency supported by the AT24CM01-SHD-B?
The AT24CM01-SHD-B supports 100 kHz (Standard Mode), 400 kHz (Fast Mode), and 1 MHz Fast Mode Plus (FM+) - but FM+ requires VCC ≥2.5V. At 1.7–2.4V, only Standard and Fast Modes are guaranteed. This allows designers to scale bus speed based on supply rail and noise environment without changing components.
Does the AT24CM01-SHD-B require external pull-up resistors on SDA and SCL lines?
Yes, the AT24CM01-SHD-B requires external pull-up resistors on both SDA and SCL. SDA is open-drain and must be pulled up (≤10 kΩ recommended); SCL may be driven actively high or pulled up. Pull-up values depend on bus capacitance and target speed - e.g., 1.3 kΩ for 1 MHz FM+, 4 kΩ for 400 kHz - as specified in the AT24CM01-SHD-B datasheet.
How does the Write-Protect (WP) pin function on the AT24CM01-SHD-B?
When WP is tied to VCC, the AT24CM01-SHD-B inhibits all write operations to its entire memory array. When WP is grounded, normal writes are enabled. If left floating, WP is internally pulled down to GND - but Microchip recommends hardwiring it to avoid noise-induced glitches. This hardware-level protection complements software locks for safety-critical data.
What is the memory organization of the AT24CM01-SHD-B?
The AT24CM01-SHD-B is organized as 131,072 words × 8 bits (1 Mbit), segmented into 512 pages of 256 bytes each. This structure enables efficient 256-byte page writes and supports random/sequential reads. Addressing uses a 7-bit slave address (with A1/A2 pins selecting among four devices) plus two 8-bit word address bytes for full 17-bit addressing.
Is the AT24CM01-SHD-B compatible with standard I²C protocol stacks?
Yes, the AT24CM01-SHD-B is fully compliant with the standard I²C specification, including Start/Stop conditions, ACK/NACK handshaking, 7-bit addressing (with A1/A2 expansion), and repeated Start support. It requires no custom drivers - standard HAL or OS I²C APIs (e.g., Linux i2c-dev, STM32 HAL_I2C) work out-of-the-box with proper timing configuration for selected mode (Standard/Fast/FM+).
AT24CM01-SHD-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- 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:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24CM01-SHD-B FAQ
1.How can I place an order for AT24CM01-SHD-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24CM01-SHD-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 AT24CM01-SHD-B reliable?
The price and inventory of AT24CM01-SHD-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24CM01-SHD-B is usually 5 days.
3.What payment methods are accepted for AT24CM01-SHD-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24CM01-SHD-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24CM01-SHD-B?
AT24CM01-SHD-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24CM01-SHD-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 AT24CM01-SHD-B?
For technical support, including AT24CM01-SHD-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24CM01-SHD-B requirements.
6.How does Aetrix verify that AT24CM01-SHD-B is sourced from the original manufacturer or authorized distributors?
All AT24CM01-SHD-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 AT24CM01-SHD-B meets industry standards.
7.What is the process for return or replacement of AT24CM01-SHD-B?
All AT24CM01-SHD-B units undergo pre-shipment inspection (PSI). If there is an issue with AT24CM01-SHD-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 AT24CM01-SHD-B part is unused and in its original packaging.
Return procedure for AT24CM01-SHD-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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