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Microchip Technology AT24C01C-MAPD-E
- Part No.:
- AT24C01C-MAPD-E
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
AT24C01C-MAPD-E.pdf
- Description:
- IC EEPROM 1KBIT I2C 1MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,244
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Product details
Overview
AT24C01C-MAPD-E from Microchip Technology (formerly Atmel) is a 1-kilobit (128 × 8) automotive-grade serial EEPROM with I²C-compatible 2-wire interface, 1.7V–5.5V supply range, -40°C to +125°C Grade 1 operation, and 8-pad UDFN package. It delivers hardware write protection via WP pin, 8-byte page writes, and 5ms max self-timed write cycle - deployed in engine control units for calibration storage.
For engineers reviewing the AT24C01C-MAPD-E datasheet, AT24C01C-MAPD-E pinout, AT24C01C-MAPD-E application, or AT24C01C-MAPD-E equivalent, key selection criteria include Grade 1 automotive qualification, UDFN-8 footprint compatibility, 400kHz I²C timing at 2.5V, Schmitt-trigger noise immunity, and 1M write-cycle endurance with 100-year data retention.
Technical Context
The AT24C01C-MAPD-E implements a synchronous 2-wire serial protocol with open-drain SDA/SCL lines, internal address counter for sequential reads, and device-addressing logic using A0–A2 pins (all active for 1K density). Its memory array is organized into 16 pages of 8 bytes each, requiring a 7-bit word address.
It features a dedicated Write Protect (WP) pin that disables all write operations when pulled high, Schmitt-trigger inputs for robust noise suppression on SCL/SDA, and an internal high-voltage pump enabling EEPROM programming without external VPP. Standby current is 0.1μA at 1.7V, supporting low-power automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1,024 bits (128 words × 8 bits), sufficient for small firmware patches or sensor calibration tables |
| Interface | I²C-compatible 2-wire serial bus, supports standard-mode (100kHz) and fast-mode (400kHz at 2.5V) |
| Supply Voltage | 1.7V to 5.5V - enables direct integration with 1.8V, 2.5V, 3.3V, and 5V microcontrollers without level shifters |
| Operating Temperature | -40°C to +125°C (AEC-Q100 Grade 1) - qualified for under-hood automotive applications |
| Write Endurance | 1,000,000 cycles - supports frequent recalibration logging in adaptive control systems |
| Data Retention | 100 years at +25°C - ensures long-term reliability across vehicle lifecycle |
| Package | 8-pad UDFN (2.0 mm × 3.0 mm, 0.5 mm pitch) - space-constrained PCB layouts in compact ECUs |
Pinout & Package
AT24C01C-MAPD-E uses an 8-pad Ultra Thin Dual No-Lead (UDFN) package per JEDEC MO-220, 2.0 mm × 3.0 mm body, 0.5 mm pitch, with exposed thermal pad (non-electrical). Pin 1 is marked by a beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardwired LSB of 3-bit device address; enables up to eight AT24C01C devices on one I²C bus |
| A1 | Device Address Input | Mid-bit of device address; used with A0 and A2 for unique 7-bit slave address generation |
| A2 | Device Address Input | MSB of device address; completes 3-bit hardware-selectable address (1010xxxA) |
| GND | Ground Reference | Return path for VCC and signal currents; must be low-impedance for noise immunity |
| VCC | Power Supply | Single 1.7–5.5V supply; powers internal logic, HV pump, and EEPROM array |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC to disable all writes, GND for normal R/W operation |
| SCL | Serial Clock Input | Positive-edge clock for data-in; negative-edge clock for data-out; requires external pull-up |
| SDA | Serial Data I/O | Open-drain bidirectional line; shared across multiple I²C devices; requires external pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Grade 1 Automotive Qualification | AEC-Q100 compliant for -40°C to +125°C operation - validated for engine control, transmission, and ADAS modules |
| Hardware Write Protection | WP pin enables system-level data integrity: prevents accidental overwrites during power transients or firmware updates |
| Page Write Capability | 8-byte page writes reduce I²C transaction overhead - cuts write time vs. byte-by-byte by up to 8× in burst calibration storage |
| Noise-Resilient Interface | Schmitt-trigger inputs and filtered logic reject >50ns glitches - critical in electrically noisy automotive harness environments |
| Low-Power Standby | 0.1 μA max standby current at 1.7V - extends battery life in always-on vehicle subsystems (e.g., keyless entry receivers) |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Storing real-time fuel trim corrections and misfire counters across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with deterministic 5ms write latency and guaranteed retention over 15-year vehicle life. Use Value: Enables adaptive learning without external backup power or supercapacitors - reduces BOM cost and board area. |
Use Scenario: Saving camera lens calibration offsets and radar beam alignment parameters after factory setup. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter vault accessed only during boot or service mode via isolated I²C bus. Use Value: WP pin prevents runtime corruption during ECU reflash; Grade 1 rating ensures stability near radar RF front-ends. |
| Body Control Module (BCM) | Infotainment Head Unit |
Use Scenario: Retaining user preferences (seat position, mirror angle, lighting profiles) across vehicle power cycles. IC Role / Device Role / Timing Role: Low-voltage (1.7V) operation allows direct connection to 1.8V domain MCU GPIOs without voltage translation. Use Value: UDFN-8 footprint saves >40% board space vs. SOIC-8 - critical for slim BCM designs behind dashboard panels. |
Use Scenario: Storing audio equalizer presets, Bluetooth pairing history, and display brightness profiles. IC Role / Device Role / Timing Role: 400kHz I²C support enables fast parameter loading during boot, reducing UI initialization time. Use Value: 1M write endurance tolerates daily user adjustments over 27 years - exceeds typical infotainment product lifetime. |
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 density, SOIC-8 only; 1.7–5.5V; AEC-Q100 Grade 2 (-40°C to +105°C); no UDFN option | Limited to less demanding under-dash applications; lacks Grade 1 qualification for under-hood use | Select if SOIC-8 layout exists and Grade 1 is not required; verify WP pin behavior matches AT24C01C-MAPD-E logic polarity |
| ON Semiconductor CAT24C01HU4IGT3 | 1K, UDFN-8, 1.7–5.5V, Grade 1 (-40°C to +125°C); 1MHz I²C support; 4ms write cycle | Higher-speed interface enables faster firmware update staging; marginally faster write latency | Prefer for new designs needing future-proof I²C bandwidth headroom; confirm SDA/SCL rise/fall time compliance with host controller |
Compared with M24C01-RMN6TP, AT24C01C-MAPD-E provides full Grade 1 qualification and UDFN packaging for space-constrained under-hood use; versus CAT24C01HU4IGT3, it offers proven field reliability in legacy automotive platforms but with lower maximum I²C speed.
Availability
AT24C01C-MAPD-E is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, body control modules, and infotainment head units requiring stable component supply across extended automotive lifecycles.
Supply support for AT24C01C-MAPD-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 acquired Atmel in 2016 and maintains its automotive EEPROM portfolio with full backward compatibility, AEC-Q100 certification, and long-term manufacturing commitment.
The AT24CxxC family was designed specifically for automotive subsystems requiring robust nonvolatile storage in harsh thermal and electrical environments - emphasizing write protection, low-voltage operation, and extended temperature resilience.
FAQ
What is the operating voltage range for AT24C01C-MAPD-E?
The AT24C01C-MAPD-E operates from 1.7V to 5.5V, supporting direct interfacing with 1.8V, 2.5V, 3.3V, and 5V microcontrollers without level-shifting circuitry. This wide range is specified for Grade 1 (−40°C to +125°C) and Grade 3 (−40°C to +85°C) variants, with the AT24C01C-MAPD-E conforming to Grade 1 performance across its full voltage window.
Does AT24C01C-MAPD-E support page writes, and what is the page size?
Yes, AT24C01C-MAPD-E supports 8-byte page writes. Its 1K memory is internally organized into 16 pages of 8 bytes each. Page writes allow up to eight sequential bytes to be written in a single I²C transaction, significantly improving throughput over byte-write operations and reducing bus contention in multi-device systems.
How does the Write Protect (WP) pin function on AT24C01C-MAPD-E?
The WP pin on AT24C01C-MAPD-E is an active-high hardware lock: when pulled to VCC, it disables all write and erase operations across the entire memory array; when grounded, normal read/write functionality is enabled. This provides fail-safe data integrity during power-up sequences, firmware updates, or EMI events without software intervention.
What package type is used by AT24C01C-MAPD-E, and what are its dimensions?
AT24C01C-MAPD-E uses an 8-pad UDFN package (designation 8MA2), measuring 2.0 mm × 3.0 mm with 0.5 mm pin pitch and an exposed thermal pad. It complies with JEDEC MO-220, enabling high-density placement in space-constrained automotive modules such as radar sensors and compact ECUs where SOIC or TSSOP footprints are prohibitive.
Is AT24C01C-MAPD-E qualified to AEC-Q100, and which grade applies?
Yes, AT24C01C-MAPD-E is AEC-Q100 qualified to Grade 1, specifying reliable operation from −40°C to +125°C. This qualification covers stress testing for temperature cycling, humidity bias, ESD, and mechanical shock - confirming suitability for under-hood applications including engine management, transmission control, and brake systems.
AT24C01C-MAPD-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:
- 1Kbit
- Memory Organization:
- 128 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (2x3)
AT24C01C-MAPD-E FAQ
1.How can I place an order for AT24C01C-MAPD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C01C-MAPD-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 AT24C01C-MAPD-E reliable?
The price and inventory of AT24C01C-MAPD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C01C-MAPD-E is usually 5 days.
3.What payment methods are accepted for AT24C01C-MAPD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C01C-MAPD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C01C-MAPD-E?
AT24C01C-MAPD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C01C-MAPD-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 AT24C01C-MAPD-E?
For technical support, including AT24C01C-MAPD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C01C-MAPD-E requirements.
6.How does Aetrix verify that AT24C01C-MAPD-E is sourced from the original manufacturer or authorized distributors?
All AT24C01C-MAPD-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 AT24C01C-MAPD-E meets industry standards.
7.What is the process for return or replacement of AT24C01C-MAPD-E?
All AT24C01C-MAPD-E units undergo pre-shipment inspection (PSI). If there is an issue with AT24C01C-MAPD-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 AT24C01C-MAPD-E part is unused and in its original packaging.
Return procedure for AT24C01C-MAPD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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