German
Japanese
Portuguese
Korea
Mexico
Dutch
Microchip Technology
AT24C64D-MAHM-T
Why Choose Us?
Professional Platform
B2B & B2C purchasingDelivery at full speed
1-2 days deliveryWide variety
Original manufacturers365 days guarantee
Responsible quality
.png)
Tech Specifications
AT24C64D-MAHM-T Description
AT24C64D-MAHM-T
64Kbit (8K x 8) I²C Serial EEPROM | 1.7V to 5.5V | 1MHz | Industrial Grade | UDFN-8 2x3mm Package
Density (8KB)
Interface
Max Clock
Supply Range
2x3mm Package
Product Overview
The Microchip AT24C64D-MAHM-T is a 64Kbit (8,192 x 8) serial EEPROM featuring an industry‑standard I²C interface. It operates over a wide voltage range of 1.7V to 5.5V, making it compatible with 1.8V, 2.5V, 3.3V, and 5V systems – eliminating the need for level shifters in mixed‑voltage designs. The device supports standard (100kHz), fast (400kHz), and fast‑plus (1MHz) I²C modes, enabling high‑speed data transfer for configuration storage, device parameters, calibration data, and small data logging applications.
The AT24C64D is organized with a 32‑byte page write buffer, a maximum write cycle time of 5 ms, and features hardware write protection (WP pin) that safeguards the entire memory array. Packaged in an ultra‑compact 8‑pad UDFN (2x3mm) leadless package (MAHM-T suffix), it occupies minimal board space, ideal for space‑constrained designs such as wearables, IoT sensors, and portable medical devices. The device operates over the industrial temperature range of -40°C to +85°C and offers 1 million write cycles and 100‑year data retention, ensuring long‑term reliability for industrial and embedded applications.
📊 Technical Specifications
| Density / Organization | 64Kbit (8,192 x 8 bits) — 8KB |
| Memory Interface | 2-wire I²C serial bus (SDA, SCL) |
| Clock Frequency | 1 MHz (max) — Fast‑Plus mode, also supports 400kHz/100kHz |
| Write Cycle Time (tW) | 5 ms maximum (page write) |
| Page Write Size | 32 bytes per page |
| Supply Voltage (Vcc) | 1.7V – 5.5V |
| Operating Temperature | Industrial: -40°C to +85°C |
| Storage Temperature | -65°C to +150°C |
| Package Type | 8‑pad UDFN (2x3mm, 0.5mm pitch) — MAHM code |
| Package Dimensions | 2.0 x 3.0 x 0.6 mm |
| Endurance | 1,000,000 write cycles (minimum) |
| Data Retention | 100 years (minimum) @ 25°C |
| Active Read Current | 1 mA (typical @ 5V, 1MHz) |
| Standby Current | 1 µA (typical) |
| Write Protection | Hardware WP pin — protects entire array |
| Device Addressing | A0, A1, A2 pins allow up to 8 devices on same bus |
| RoHS / Halogen Free | Yes — “T” suffix indicates tape & reel, Pb‑free |
| ESD Protection | HBM > 4000V, CDM > 1000V |
| Moisture Sensitivity Level | MSL 1 (unlimited floor life) |
| Part Status | Active — In production |
✨ Key Features
- ✅ Ultra‑Wide Voltage Range – 1.7V to 5.5V, supports 1.8V, 2.5V, 3.3V, and 5V rails – no level shifters needed
- ✅ High‑Speed I²C – 1MHz Fast‑Plus mode for rapid data transfer
- ✅ Low Power Consumption – 1µA standby current ideal for battery‑powered designs
- ✅ Hardware Write Protection – WP pin prevents accidental writes to entire memory
- ✅ Page Write Capability – 32‑byte page write reduces programming time
- ✅ High Endurance – 1 million write cycles for frequent configuration updates
- ✅ Long Data Retention – 100 years of data retention ensures long‑term reliability
- ✅ Multi‑Device Support – Up to 8 devices on the same I²C bus via A0/A1/A2 pins
- ✅ Ultra‑Compact UDFN Package – 2x3mm footprint, ideal for space‑constrained designs
- ✅ Industrial Temperature Range – -40°C to +85°C for outdoor and factory automation
- ✅ Schmitt Trigger Inputs for Noise Suppression – Improved signal integrity in noisy environments
- ✅ Output Slope Control – Reduces ground bounce and EMI
- ✅ Microchip Quality & Long‑term Availability – 15‑20 year product support for industrial designs
⚡ I²C Performance & Write Protection
Write throughput: up to 6.4 kbyte/s (page write)
WP pin high = full array write‑protected
The AT24C64D includes a write enable latch (WEL) that prevents accidental writes after power‑up. A write disable command resets the latch, adding an extra layer of security against unintended modifications.
🧠 Memory Organization & Addressing
The 64Kbit memory is organized as 8,192 x 8 (8KB). The device uses a two‑byte address word (A15–A0) for random reads/writes. Page write allows up to 32 consecutive bytes to be written with a single internal write cycle, significantly improving throughput for block updates. The I²C slave address comprises a fixed portion (1010) and the three address pins (A2, A1, A0), allowing up to eight devices on the same bus.
📦 Ordering Information & Part Number Decoder
| Orderable Part Number | Temperature | Package | Description |
|---|---|---|---|
| AT24C64D-MAHM-T | -40°C to +85°C | UDFN-8 (2x3mm) | Industrial, tape & reel (5000 pcs/reel) |
| AT24C64D-MAHM-B | -40°C to +85°C | UDFN-8 (2x3mm) | Bulk / tube packaging |
| AT24C64D-SSHM-T | -40°C to +85°C | SOIC-8 (150mil) | Industrial, tape & reel |
| AT24C64D-XHM-T | -40°C to +85°C | TSSOP-8 | Industrial, tape & reel |
| AT24C64D-STUM-T | -40°C to +85°C | SOT-23-5 | Ultra‑compact package |
• AT24C64D – Microchip serial EEPROM, 64Kbit, 1.7-5.5V, D revision
• MAHM – Package: MA = UDFN (2x3mm), HM = High‑performance, industrial temperature
• -T – Tape & Reel packaging (lead‑free / RoHS)
🏆 Why Microchip?
Microchip Technology Inc. (NASDAQ: MCHP) is a leading provider of microcontrollers, mixed-signal, analog, and Flash-IP solutions. With over 30 years of innovation, Microchip offers comprehensive technical support, long product lifecycles, and industry-leading quality. The AT24Cxx family of I²C EEPROMs is an industry standard, trusted by engineers worldwide for its reliability, low power, and wide voltage operation.
- #1 Serial EEPROM supplier worldwide – over 25 billion units shipped
- 40+ year legacy in memory products, including EEPROM, Flash, and serial SRAM
- AEC-Q100 qualified automotive options for all AT24CxxD devices
- Global supply chain with authorized distributors in every region
- Free samples & comprehensive documentation available at Microchip Direct
The AT24C64D is manufactured in Microchip’s own fabs, ensuring consistent quality, traceability, and long-term availability (minimum 15-year support).
🛠️ Development Tools & Resources
Microchip offers free samples, reference designs, and 24/7 technical support via their support portal. The AT24C64D is fully compatible with Microchip’s MPLAB® development environment and Harmony framework.
📄 Certifications & Compliance
- RoHS 2011/65/EU (Compliant)
- REACH SVHC (Compliant)
- Halogen‑free (IEC 61249-2-21)
- Conflict minerals reporting (available upon request)
- AEC-Q100 Grade 2/3 options available (contact Microchip)
📦 Packaging & Logistics
- Tape & Reel: 5,000 pieces per 13" reel (UDFN)
- Cut tape / bulk packaging available for prototyping
- Moisture Sensitivity Level: MSL 1 (unlimited)
- Lead finish: NiPdAu or Sn (100% matte tin)
- Lead time: 12 weeks ARO (typical), stock available through distributors
FAQ
| Quantity | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.36080 | $0.36 |
| 5000+ | $0.30800 | $1540.00 |
Not available to buy online? Want the lower wholesale price? Please Send RFQ to get best price, we will respond immediately
.png?x-oss-process=image/format,webp/resize,h_32)
