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Microchip Technology AT24HC02C-PUM
- Part No.:
- AT24HC02C-PUM
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24HC02C-PUM.pdf
- Description:
- IC EEPROM 2KBIT I2C 1MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,567
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Product details
Overview
AT24HC02C-PUM from Microchip Technology is a 2-Kbit I²C-compatible serial EEPROM organized as 256 × 8, operating from 1.7V to 5.5V with industrial temperature range (−40°C to +85°C), 1 MHz Fast Mode Plus support at ≥2.5V, and hardware write-protection via WP pin - used for nonvolatile configuration storage in microcontroller-based embedded systems.
For engineers reviewing the AT24HC02C-PUM datasheet, AT24HC02C-PUM pinout, AT24HC02C-PUM application, or AT24HC02C-PUM equivalent, key selection criteria include voltage compatibility (1.7–5.5V), I²C bus speed modes (100/400 kHz, 1 MHz FM+), page-write capability (8-byte pages), ultra-low standby current (≤6 μA), and half-array hardware write protection.
Technical Context
The AT24HC02C-PUM implements a two-wire I²C slave interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain bidirectional data transfer. It supports standard, fast, and fast-mode plus timing with tLOW/tHIGH down to 500 ns / 400 ns at 2.5–5.5V.
Internally, it uses a high-voltage generation circuit for EEPROM programming, power-on reset (VPOR = 1.5V), and automatic address decoding with A0–A2 pins enabling up to eight devices on one bus. Write protection is implemented via dedicated WP pin controlling upper-half (1K) memory lock.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2,048 bits (256 × 8), sufficient for firmware configuration, calibration data, or device ID storage |
| Supply voltage | 1.7V to 5.5V - enables direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifters |
| I²C speed modes | 100 kHz (std), 400 kHz (fast), 1 MHz (FM+) - supports high-throughput updates in time-critical systems |
| Write endurance | 1,000,000 cycles - ensures long-term reliability in logging or parameter-tuning applications |
| Data retention | 100 years at 55°C - guarantees persistent storage across product lifetime under thermal stress |
| Standby current | ≤6 μA at 5.5V - minimizes battery drain in always-on or energy-harvesting edge nodes |
| Write cycle time | ≤5 ms max - enables predictable timeout handling in real-time firmware without blocking delays |
Pinout & Package
AT24HC02C-PUM is supplied in an 8-lead PDIP package (plastic dual in-line package) with 0.3-inch body width, through-hole mounting, and RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Hardware device address input | Configures LSB of 3-bit slave address; tied high/low to enable multi-device I²C bus addressing (up to 8 units) |
| A1 | Hardware device address input | Configures middle bit of 3-bit slave address; required for unique identification in shared-bus systems |
| A2 | Hardware device address input | Configures MSB of 3-bit slave address; allows cascading with other AT24HC-series EEPROMs |
| GND | Power reference ground | Mandatory low-impedance connection to system ground plane to ensure stable logic thresholds and noise immunity |
| SDA | Serial data bidirectional I/O | Open-drain line requiring external pull-up (≤10 kΩ); carries command, address, and data bytes with ACK/NACK signaling |
| SCL | Serial clock input | Master-generated clock; rising edge latches input, falling edge outputs data; must be pulled high when idle |
| WP | Hardware write-protect control | Active-high signal locking upper 1K-bit memory block; prevents accidental overwrites during power transients |
| VCC | Device power supply | Accepts 1.7–5.5V; internal POR circuit requires monotonic ramp ≤0.1 V/µs and tPUP ≥100 µs before first command |
Key Features
| Feature | Design Value |
|---|---|
| FM+ I²C support (1 MHz) | Enables faster configuration writes in systems using modern 3.3V/5V MCUs with FM+ peripherals |
| 8-byte page write mode | Reduces I²C transaction overhead by allowing burst writes within a single page boundary |
| Schmitt-triggered inputs | Rejects bus noise and EMI-induced glitches on SDA/SCL, improving robustness in electrically noisy environments |
| Half-array hardware write protect | Allows independent locking of upper 1K-bit sector while leaving lower 1K-bit freely writable for runtime parameters |
| Green packaging | Lead-free, halide-free, RoHS-compliant PDIP construction meets global environmental compliance requirements |
Applications
| Industrial Sensor Node | Medical Device Calibration |
|---|---|
Use Scenario: Battery-powered wireless sensor node storing sensor offset/gain coefficients and network credentials across power cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with I²C interface to host MCU; retains data during deep-sleep or brown-out events. Use Value: Enables field-replaceable calibration without reprogramming firmware; 100-year retention ensures accuracy over device lifetime. | Use Scenario: Portable diagnostic instrument storing patient-specific calibration profiles and usage logs. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter storage; WP pin prevents unauthorized modification of critical calibration values. Use Value: Meets IEC 62304 safety requirements for medical data integrity; 1M-cycle endurance supports frequent recalibration. |
| Smart Home Controller | Automotive Body Control Module |
Use Scenario: HVAC controller retaining user preferences, schedule settings, and firmware update status after AC loss. IC Role / Device Role / Timing Role: Low-voltage (1.8V) compatible EEPROM interfaced directly to 32-bit ARM Cortex-M MCU via I²C. Use Value: 1.7V operation ensures reliable write during brown-out recovery; 6 μA standby current extends backup battery life. | Use Scenario: Door module storing seat position memory, mirror presets, and fault history in 12V automotive electrical environment. IC Role / Device Role / Timing Role: Industrial-grade EEPROM operating across −40°C to +85°C ambient; withstands load-dump and cold-crank conditions. Use Value: Qualified for automotive-adjacent use with 1000V ESD rating and 100-year data retention at elevated temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C02D-SSHM-T | Same 2-Kbit capacity, SOIC-8 package, but rated for 1.7–5.5V and supports only up to 400 kHz (no FM+) | Lacks 1 MHz FM+ mode; suitable where bus speed <400 kHz suffices and surface-mount is preferred | Select when PCB space constraints favor SOIC and maximum I²C speed is ≤400 kHz |
| M24C02-RMN6TP | 2-Kbit EEPROM in TSSOP-8; supports 1.8–5.5V, 400 kHz only; no FM+ or 1.7V operation | Higher minimum VCC (1.8V); no 1.7V support limits use with ultra-low-voltage MCUs | Choose for cost-sensitive consumer designs where 1.8V+ supply and TSSOP footprint are acceptable |
Compared with AT24HC02C-PUM, AT24C02D-SSHM-T omits FM+ and uses SOIC packaging, while M24C02-RMN6TP raises minimum VCC to 1.8V and lacks 1.7V capability - making AT24HC02C-PUM uniquely suited for 1.7V systems requiring 1 MHz I²C throughput and through-hole assembly.
Availability
AT24HC02C-PUM is available at Aetrix Electronics and suitable for industrial sensor nodes, medical calibration systems, smart home controllers, and automotive body control modules requiring stable component supply, long-term obsolescence management, and RoHS-compliant through-hole packaging.
Supply support for AT24HC02C-PUM 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 devices, and memory solutions, with ISO 9001-certified quality systems and global manufacturing.
The AT24HC02C-PUM belongs to Microchip's AT24HC family of I²C EEPROMs designed for low-voltage, high-reliability nonvolatile storage in industrial, medical, and consumer embedded systems.
FAQ
What is the maximum I²C clock frequency supported by the AT24HC02C-PUM?
The AT24HC02C-PUM supports 100 kHz (Standard Mode), 400 kHz (Fast Mode), and 1 MHz (Fast Mode Plus) I²C speeds. FM+ operation requires VCC ≥2.5V; below that, only Standard and Fast Modes are guaranteed. This makes AT24HC02C-PUM suitable for high-speed configuration updates in modern microcontroller systems while maintaining backward compatibility.
Does the AT24HC02C-PUM require external pull-up resistors on SDA and SCL lines?
Yes, the AT24HC02C-PUM requires external pull-up resistors on both SDA and SCL lines because SDA is open-drain and SCL is an input. Microchip specifies maximum pull-up values of 10 kΩ for 100 kHz, 4 kΩ for 400 kHz, and 1.3 kΩ for 1 MHz operation. The AT24HC02C-PUM itself does not integrate pull-ups, so proper resistor selection is essential for signal integrity and timing compliance.
How does the Write-Protect (WP) pin function on the AT24HC02C-PUM?
The WP pin on the AT24HC02C-PUM provides hardware-level protection for the upper half (1K-bit) of memory. When WP is driven high (to VCC), writes to addresses 0x80–0xFF are inhibited; when grounded, full memory access is enabled. If left floating, WP is internally pulled down - but Microchip recommends hard-wiring it to avoid noise-induced false protection. This feature safeguards critical calibration or security data stored in the upper array.
What is the write endurance and data retention specification for the AT24HC02C-PUM?
The AT24HC02C-PUM guarantees 1,000,000 write cycles and 100 years of data retention at 55°C. These specifications are validated per JEDEC standards and reflect actual cell-level performance under specified operating conditions. The AT24HC02C-PUM achieves this via optimized charge-pump circuitry and oxide quality control, making it appropriate for applications involving frequent parameter updates or long-deployment field equipment.
Can the AT24HC02C-PUM operate reliably at 1.7V supply voltage?
Yes, the AT24HC02C-PUM is fully specified for operation from 1.7V to 5.5V, including all I²C modes (100/400 kHz) and functional behavior such as page writes, read operations, and WP pin response. Its internal power-on reset (POR) threshold is 1.5V, and tPUP is guaranteed at 100 µs - ensuring robust startup and communication even in ultra-low-voltage battery-powered systems where the AT24HC02C-PUM is commonly deployed.
AT24HC02C-PUM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24HC02C-PUM FAQ
1.How can I place an order for AT24HC02C-PUM through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24HC02C-PUM 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 AT24HC02C-PUM reliable?
The price and inventory of AT24HC02C-PUM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24HC02C-PUM is usually 5 days.
3.What payment methods are accepted for AT24HC02C-PUM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24HC02C-PUM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24HC02C-PUM?
AT24HC02C-PUM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24HC02C-PUM 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 AT24HC02C-PUM?
For technical support, including AT24HC02C-PUM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24HC02C-PUM requirements.
6.How does Aetrix verify that AT24HC02C-PUM is sourced from the original manufacturer or authorized distributors?
All AT24HC02C-PUM 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 AT24HC02C-PUM meets industry standards.
7.What is the process for return or replacement of AT24HC02C-PUM?
All AT24HC02C-PUM units undergo pre-shipment inspection (PSI). If there is an issue with AT24HC02C-PUM, 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 AT24HC02C-PUM part is unused and in its original packaging.
Return procedure for AT24HC02C-PUM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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