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Microchip Technology AT24C08C-PUM
- Part No.:
- AT24C08C-PUM
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C08C-PUM.pdf
- Description:
- IC EEPROM 8KBIT I2C 1MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:709
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Product details
Overview
AT24C08C-PUM from Microchip Technology is an 8-Kbit I²C-compatible serial EEPROM organized as 1,024 × 8 bits, operating from 1.7V to 5.5V with industrial temperature range (−40°C to +85°C), supporting 1 MHz Fast Mode Plus, and featuring hardware write protection via the WP pin - used for nonvolatile configuration storage in microcontroller-based sensor nodes and power management systems.
For engineers reviewing the AT24C08C-PUM datasheet, AT24C08C-PUM pinout, AT24C08C-PUM application, or AT24C08C-PUM 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 (2-device limit on shared bus).
Technical Context
The AT24C08C-PUM implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and internal pull-downs on A2 and WP pins. It supports Standard (100 kHz), Fast (400 kHz), and Fast Mode Plus (1 MHz) operation depending on VCC level - requiring ≥2.5V for 1 MHz mode.
Memory is organized into 64 pages of 16 bytes each, enabling partial-page writes and sequential reads. The device uses an internal high-voltage generation circuit for EEPROM programming and includes Power-on Reset (POR) with 100 µs tPUP delay after stable VCC before command acceptance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1,024 × 8 bits) - sufficient for firmware calibration tables or device identity data in compact embedded systems |
| Supply voltage | 1.7V to 5.5V - enables direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifters |
| Interface speed | Up to 1 MHz (Fast Mode Plus at VCC ≥2.5V) - reduces configuration load time in high-throughput boot sequences |
| Write endurance | 1,000,000 cycles - supports frequent logging or parameter updates in industrial controllers |
| Data retention | 100 years at 55°C - ensures long-term reliability in sealed or inaccessible deployments |
| Standby current | ≤6 μA at 5.5V - critical for battery-powered IoT endpoints where quiescent power dominates lifetime |
| Write-protect | Hardware WP pin - prevents accidental overwrites during firmware updates or brown-out conditions |
Pinout & Package
AT24C08C-PUM is supplied in an 8-lead PDIP package (0.300" wide), with pin 1 marked by notch or dot. Pin functions are defined per Microchip DS20006127B, and A1 is NC (no connect) on this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect (NC) | Not bonded; must be left unconnected - no routing or pull-up required |
| 2 | A2 | Device address input; hardwire to GND/VCC to select one of two possible I²C addresses on shared bus |
| 3 | GND | Power ground reference; must connect directly to system ground plane for noise immunity |
| 4 | SDA | Open-drain bidirectional I²C data line; requires external 1.3–10 kΩ pull-up resistor to VCC |
| 5 | SCL | Input-only I²C clock line; requires external pull-up; rising edge latches input, falling edge outputs data |
| 6 | WP | Write-protect control; logic high (VCC) disables all writes to entire memory array |
| 7 | VCC | Power supply input; must ramp monotonically at ≤0.1 V/µs during power-up to ensure POR stability |
| 8 | NC | No Connect - not internally bonded; electrically isolated and unused |
Key Features
| Feature | Design Value |
|---|---|
| 16-byte page write | Enables efficient partial updates without erasing full pages - reduces write latency in real-time parameter tuning |
| Schmitt-trigger inputs | Rejects bus noise up to 100 ns spikes - improves robustness in electrically noisy motor-control or power-supply environments |
| Internal pull-downs on A2/WP | Ensures deterministic default state when pins float - eliminates need for external biasing in space-constrained layouts |
| Software reset capability | Recovers I²C bus lockup with ≤9 dummy SCL clocks - avoids mandatory power cycle in field-deployed systems |
| Green RoHS-compliant packaging | Meets lead-free/halide-free requirements for global industrial and automotive compliance without derating |
Applications
| Industrial Sensor Calibration | Smart Meter Configuration Storage |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients and temperature compensation tables for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register - retains values across cold starts and brownouts; accessed only during initialization or recalibration. Use Value: Eliminates need for external trimming components and enables field-updatable calibration via I²C, reducing BOM cost and test time. | Use Scenario: Holding tariff schedules, meter ID, billing history, and security keys in utility-grade electricity meters operating for >15 years unattended. IC Role / Device Role / Timing Role: Secure, long-life parameter vault - write-protected during normal operation; updated only during authorized firmware upgrades. Use Value: Meets ANSI C12.19 and IEC 62056 requirements for 100-year data retention and 1M-cycle endurance under temperature cycling. |
| Embedded System Bootloader Settings | Medical Device Usage Logs |
Use Scenario: Storing bootloader jump vectors, secure boot flags, and last-known-good firmware version in Class I medical diagnostic equipment. IC Role / Device Role / Timing Role: Trusted configuration anchor - verified before code execution; write-protected except during controlled update procedures. Use Value: Enables fail-safe recovery and audit-trail integrity without adding flash wear-leveling complexity to main MCU. | Use Scenario: Recording timestamped usage events (e.g., actuation count, self-test results, error codes) in portable infusion pumps with 5-year service life. IC Role / Device Role / Timing Role: Low-power event logger - wakes only on interrupt, writes 16-byte pages, then returns to <6 μA standby. Use Value: Extends single CR2032 battery life beyond 3 years while meeting FDA 21 CFR Part 11 electronic record requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C08D-PUM | Same 8-Kbit capacity and PDIP-8 package, but newer revision with enhanced ESD (>6 kV HBM) and tighter AC timing specs | Preferred for new designs requiring higher noise immunity or extended qualification per AEC-Q200 Grade 2 | Select AT24C08D-PUM if long-term supply assurance and margin against ESD transients are prioritized over legacy footprint compatibility |
| M24C08-RMN6TP | 8-Kbit I²C EEPROM in 8-lead SOIC; identical VCC range and 1 MHz support, but lacks internal A2 pull-down and has higher max ICC2 (3.5 mA) | Better suited for space-constrained PCBs where SOIC fits but PDIP does not; requires external A2 biasing | Choose M24C08-RMN6TP when board area is constrained and external address control is acceptable |
Compared with AT24C08C-PUM, AT24C08D-PUM offers improved ESD robustness and tighter timing margins for next-gen designs, while M24C08-RMN6TP trades PDIP compatibility for smaller SOIC footprint and requires external address handling - both remain functionally aligned for configuration storage but differ in layout, qualification, and long-term sourcing strategy.
Availability
AT24C08C-PUM is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, and embedded bootloader settings requiring stable component supply across multi-year production cycles.
Supply support for AT24C08C-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 manufacturing and global distribution.
The AT24C08C-PUM belongs to Microchip's legacy AT24Cxx family of I²C EEPROMs, designed specifically for low-voltage, low-power nonvolatile storage in cost-sensitive industrial and commercial systems where reliability and long-term data integrity are essential.
FAQ
What is the maximum I²C clock frequency supported by AT24C08C-PUM?
The AT24C08C-PUM supports up to 1 MHz Fast Mode Plus operation, but only when VCC is ≥2.5V. At 1.7V–2.5V, maximum clock frequency is limited to 400 kHz (Fast mode). This voltage-dependent speed scaling ensures timing compliance across its full 1.7–5.5V operating range without external clock dividers or mode selection logic.
Does AT24C08C-PUM require external pull-up resistors on SDA and SCL lines?
Yes, AT24C08C-PUM requires external pull-up resistors on both SDA and SCL. SDA is open-drain and must use 1.3–10 kΩ; SCL is input-only but also needs pull-up for bus idle state. Values depend on bus capacitance and target speed: 1.3 kΩ for 1 MHz, 4 kΩ for 400 kHz, and 10 kΩ for 100 kHz per Microchip DS20006127B.
Is the A1 pin functional on AT24C08C-PUM?
No, the A1 pin is not functional on AT24C08C-PUM - it is designated NC (No Connect) per Microchip's pin function table. Only A2 serves as a device address input, allowing up to two AT24C08C devices on the same I²C bus. This differs from AT24C04C, where A1 is active.
How does the write-protect (WP) pin operate on AT24C08C-PUM?
When WP is tied to VCC, AT24C08C-PUM disables all write operations to its entire 8-Kbit memory array. When WP is at GND or left floating (internally pulled down), writes are enabled. Floating WP is functional but discouraged due to noise susceptibility; a 10 kΩ or lower pull-up/down is recommended for deterministic behavior.
What is the typical standby current consumption of AT24C08C-PUM?
The typical standby current of AT24C08C-PUM is ≤6 μA at VCC = 5.5V and ≤1.0 μA at VCC = 1.7V, measured with all inputs at VCC or GND. This ultra-low quiescent draw makes it suitable for battery-backed systems where multi-year operation without maintenance is required.
AT24C08C-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:
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C08C-PUM FAQ
1.How can I place an order for AT24C08C-PUM through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C08C-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 AT24C08C-PUM reliable?
The price and inventory of AT24C08C-PUM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C08C-PUM is usually 5 days.
3.What payment methods are accepted for AT24C08C-PUM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C08C-PUM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C08C-PUM?
AT24C08C-PUM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C08C-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 AT24C08C-PUM?
For technical support, including AT24C08C-PUM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C08C-PUM requirements.
6.How does Aetrix verify that AT24C08C-PUM is sourced from the original manufacturer or authorized distributors?
All AT24C08C-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 AT24C08C-PUM meets industry standards.
7.What is the process for return or replacement of AT24C08C-PUM?
All AT24C08C-PUM units undergo pre-shipment inspection (PSI). If there is an issue with AT24C08C-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 AT24C08C-PUM part is unused and in its original packaging.
Return procedure for AT24C08C-PUM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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