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Microchip Technology AT24C08C-MAHM-E
- Part No.:
- AT24C08C-MAHM-E
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
AT24C08C-MAHM-E.pdf
- Description:
- IC EEPROM 8KBIT I2C 1MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:14,270
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Product details
Overview
AT24C08C-MAHM-E from Microchip Technology is an 8-Kbit (1,024 × 8) I²C-compatible serial EEPROM in an 8-pad UDFN package, operating from 1.7V to 5.5V with industrial temperature range (−40°C to +85°C), 1 MHz Fast Mode Plus support, and hardware write protection via WP pin - deployed for configuration storage in embedded controllers, power management units, and sensor calibration modules.
For engineers reviewing the AT24C08C-MAHM-E datasheet, AT24C08C-MAHM-E pinout, AT24C08C-MAHM-E application, or AT24C08C-MAHM-E equivalent, key selection criteria include I²C bus voltage compatibility (1.7–5.5V), page-write timing (≤5 ms), standby current (≤6 μA), and hardware addressability (A2 only, A1 NC) in space-constrained UDFN layouts.
Technical Context
The AT24C08C-MAHM-E implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA/SCL inputs, supporting Standard (100 kHz), Fast (400 kHz), and Fast Mode Plus (1 MHz) speeds depending on VCC level. Its internal memory is organized as 64 pages of 16 bytes each, enabling partial-page writes and sequential reads without address wraparound.
Hardware addressing uses only the A2 pin (A1 is no-connect per datasheet), allowing up to two devices on a shared bus. Write protection is controlled exclusively by the WP pin: tied to VCC disables all writes; tied to GND enables full-array writes. Power-on reset ensures command rejection until VCC stabilizes above 1.5 V and tPUP (100 µs) elapses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1,024 × 8 bits), organized as 64 pages × 16 bytes - supports efficient firmware parameter storage with minimal address overhead. |
| Supply voltage | 1.7 V to 5.5 V - interoperable with 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains without level-shifting. |
| I²C speed modes | 100 kHz (1.7–5.5 V), 400 kHz (1.7–5.5 V), 1 MHz (2.5–5.5 V) - enables high-throughput configuration updates in fast-boot systems. |
| Write cycle time | ≤5 ms max self-timed write - eliminates need for external polling delay in host firmware; ACK polling supported. |
| Standby current | ≤6 μA at 5.5 V - critical for battery-backed real-time clocks and always-on IoT edge nodes. |
| Data retention | 100 years at 55°C - validated for long-life industrial equipment requiring unattended operation over decades. |
| Endurance | 1,000,000 write cycles - sufficient for daily calibration logging over 27+ years. |
| ESD rating | >4,000 V HBM - robust against handling and board-level ESD events in manufacturing and field service. |
Pinout & Package
AT24C08C-MAHM-E is housed in an 8-pad UDFN (Ultra Thin Dual Flat No-lead) package, 2.0 mm × 1.6 mm × 0.55 mm, with exposed pad (recommended connected to GND for thermal and EMI performance). Pin 1 is marked by a dot; top-view orientation matches Microchip DS20006127B-page 4 diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No-connect | Internally unconnected; must be left floating or tied to GND - no electrical function in AT24C08C. |
| 2 (A2) | Device address input | Hardwired to GND/VCC to set LSB of 7-bit I²C address (1010xx0); enables dual-device bus sharing. |
| 3 (GND) | Ground reference | Primary return path for VCC and I/O; connects to system ground plane; exposed pad should be soldered to GND pour. |
| 4 (VCC) | Power supply | 1.7–5.5 V DC input; requires local 100 nF ceramic decoupling capacitor placed ≤2 mm from pin. |
| 5 (WP) | Write-protect control | Active-high: tied to VCC locks entire memory array; tied to GND enables writes; internal pull-down if floating. |
| 6 (SCL) | Serial clock input | Open-drain compatible; requires external pull-up (≤10 kΩ); rising edge latches input data, falling edge outputs data. |
| 7 (SDA) | Serial data I/O | Bidirectional open-drain line; shared across I²C bus; requires same pull-up as SCL; Schmitt trigger suppresses noise. |
| 8 (NC) | No-connect | Internally unconnected; no routing or termination required. |
Key Features
| Feature | Design Value |
|---|---|
| 16-byte page write mode | Enables burst programming of up to 16 bytes per write cycle without address incrementing - reduces I²C transaction count by 94% vs. byte writes. |
| Hardware write protection (WP) | Dedicated pin disables all memory writes when driven high - prevents accidental corruption during firmware updates or brown-out conditions. |
| Schmitt-triggered, filtered I/O | Rejects >100 ns noise spikes on SDA/SCL - eliminates false start/stop detection in electrically noisy motor-control or power-supply environments. |
| Low-voltage operation (1.7 V) | Guaranteed functionality down to 1.7 V - supports direct interfacing with ultra-low-power microcontrollers (e.g., PIC16LF, MSP430FR) without regulators. |
| Green RoHS-compliant packaging | Lead-free, halide-free UDFN - meets IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), suitable for lead-free reflow. |
Applications
| Industrial Sensor Calibration | Embedded System Configuration |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients and linearization tables for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during power-up initialization; read-only during runtime; updated only during calibration service mode. Use Value: Enables field-replaceable sensor modules with unique calibration data preserved across 100-year lifetime - eliminating recalibration labor and downtime. | Use Scenario: Holding boot parameters, network MAC addresses, and user preferences in networked HVAC controllers and smart meters. IC Role / Device Role / Timing Role: I²C slave device providing persistent storage for MCU during cold start; accessed via standard Linux i2c-dev interface or bare-metal driver. Use Value: Reduces BOM cost vs. SPI flash; leverages existing two-wire bus infrastructure; consumes <6 μA in standby - extends battery life in backup-powered units. |
| Power Supply Sequencing | Medical Device Settings Storage |
Use Scenario: Saving dynamic rail enable/disable sequences and voltage thresholds in multi-output PMICs used in FPGA-based test equipment. IC Role / Device Role / Timing Role: Configuration register mapped to I²C address space; written once during manufacturing; read at every power-on reset. Use Value: Eliminates need for external OTP fuses or costly ASIC customization - allows late-stage firmware tuning of power sequencing behavior. | Use Scenario: Retaining patient-specific therapy parameters and usage logs in portable insulin pumps and wearable ECG monitors. IC Role / Device Role / Timing Role: Secure nonvolatile memory with hardware write lock (WP tied to safety interlock); accessed only during clinician setup or diagnostics. Use Value: Meets IEC 62304 Class C software requirements for data integrity; 1M write cycles support >10 years of daily log entries. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C08D-MAHM-T | Same 8-Kbit capacity, UDFN-8 package, and 1.7–5.5 V operation; differs in revision (D vs. C) with minor process enhancements and updated qualification testing. | No functional change; identical pinout, timing, and I²C protocol - drop-in replacement for new designs requiring latest Microchip wafer fab release. | Select AT24C08D-MAHM-T for new production ramps where long-term supply continuity and latest reliability data are prioritized. |
| M24C08-RMN6TP | 8-Kbit I²C EEPROM in 8-pin SO-TSSOP; supports 1.8–5.5 V; max 400 kHz (no FM+); 1 μA standby current; different device address scheme (A0/A1/A2). | Larger footprint (3 × 4.4 mm vs. 2 × 1.6 mm); lacks 1 MHz mode; lower standby current but higher pin count - suited for legacy PCBs with SOIC footprints. | Choose M24C08-RMN6TP only when redesigning for SOIC layout reuse or when 1 MHz operation is unnecessary and sub-1 μA standby is mandatory. |
Compared with AT24C08C-MAHM-E, AT24C08D-MAHM-T offers identical functionality with enhanced process maturity, while M24C08-RMN6TP trades UDFN miniaturization and FM+ speed for SOIC compatibility and marginally lower standby current - making the original AT24C08C-MAHM-E optimal for space-constrained, high-speed I²C designs requiring proven qualification history.
Availability
AT24C08C-MAHM-E is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, and medical device settings storage requiring stable component supply, long-lifecycle assurance, and RoHS-compliant UDFN packaging.
Supply support for AT24C08C-MAHM-E 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 memory solutions, with design centers across the Americas, Europe, and Asia.
The AT24Cxx series targets cost-sensitive, low-power embedded systems needing reliable, small-footprint serial EEPROM - optimized for industrial, automotive, and medical applications demanding extended data retention and wide voltage operation.
FAQ
What is the maximum I²C clock frequency supported by AT24C08C-MAHM-E?
The AT24C08C-MAHM-E supports up to 1 MHz in Fast Mode Plus, but only when VCC is ≥2.5 V. At 1.7–2.5 V, maximum speed is 400 kHz (Fast Mode). Standard Mode (100 kHz) operates across the full 1.7–5.5 V range. These limits are defined in DS20006127B Section 4.4 and must be enforced in host controller clock generation to ensure reliable ACK/NACK timing and data validity.
Does AT24C08C-MAHM-E require external pull-up resistors on SDA and SCL lines?
Yes, AT24C08C-MAHM-E requires external pull-up resistors on both SDA and SCL lines because both pins are open-drain. Recommended values are ≤10 kΩ for 100 kHz, ≤4 kΩ for 400 kHz, and ≤1.3 kΩ for 1 MHz operation, as specified in DS20006127B Table 4-3. Pull-ups must connect to the same VCC domain as the AT24C08C-MAHM-E supply to avoid level-shifting issues.
How many devices can share the same I²C bus with AT24C08C-MAHM-E?
Up to two AT24C08C-MAHM-E devices can share one I²C bus, using the A2 pin to select between addresses 0x50 and 0x51. The A1 pin is no-connect on AT24C08C, unlike AT24C04C which uses both A1 and A2 for four-device addressing. This limitation is explicitly stated in DS20006127B Section 2.1 and Figure 3-1.
What happens to AT24C08C-MAHM-E when the WP pin is left floating?
When the WP pin is left floating, AT24C08C-MAHM-E internally pulls it down to GND, enabling normal write operations. However, Microchip strongly recommends tying WP to a defined logic level (GND for write-enable, VCC for write-protect) due to potential capacitive coupling noise in system layouts - this guidance appears in DS20006127B Section 2.5 and Table 2-2.
Is AT24C08C-MAHM-E compatible with standard I²C protocol stacks in Linux or RTOS environments?
Yes, AT24C08C-MAHM-E is fully compliant with standard I²C protocol specifications (Philips Semiconductors UM10204), including START/STOP conditions, ACK/NACK handshaking, and 7-bit addressing. It integrates seamlessly with Linux i2c-dev drivers, Zephyr's I2C EEPROM subsystem, and FreeRTOS+IO - requiring only correct device tree binding (compatible = "atmel,at24") and proper pull-up resistor sizing per bus speed.
AT24C08C-MAHM-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not 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:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (2x3)
AT24C08C-MAHM-E FAQ
1.How can I place an order for AT24C08C-MAHM-E through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C08C-MAHM-E 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 AT24C08C-MAHM-E reliable?
The price and inventory of AT24C08C-MAHM-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C08C-MAHM-E is usually 5 days.
3.What payment methods are accepted for AT24C08C-MAHM-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C08C-MAHM-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C08C-MAHM-E?
AT24C08C-MAHM-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C08C-MAHM-E 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 AT24C08C-MAHM-E?
For technical support, including AT24C08C-MAHM-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C08C-MAHM-E requirements.
6.How does Aetrix verify that AT24C08C-MAHM-E is sourced from the original manufacturer or authorized distributors?
All AT24C08C-MAHM-E 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 AT24C08C-MAHM-E meets industry standards.
7.What is the process for return or replacement of AT24C08C-MAHM-E?
All AT24C08C-MAHM-E units undergo pre-shipment inspection (PSI). If there is an issue with AT24C08C-MAHM-E, 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 AT24C08C-MAHM-E part is unused and in its original packaging.
Return procedure for AT24C08C-MAHM-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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