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Microchip Technology 24AA08/SN
- Part No.:
- 24AA08/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24AA08/SN.pdf
- Description:
- IC EEPROM 8KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,335
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Product details
Overview
24AA08/SN from Microchip Technology Inc. is an 8-Kbit I²C-compatible serial EEPROM organized as four 256 × 8-bit blocks, operating from 1.7V to 5.5V with 400 kHz max clock frequency, 1 µA standby current, and industrial temperature range (–40°C to +85°C). It features hardware write-protection via the WP pin, 16-byte page write buffer, and Schmitt-trigger inputs for noise immunity in embedded control and sensor calibration applications.
For engineers reviewing the 24AA08/SN datasheet, 24AA08/SN pinout, 24AA08/SN application, or 24AA08/SN equivalent, this page delivers verified electrical specs, SOIC-8 package details, I²C timing constraints at 1.7V–5.5V, endurance (1M cycles), and real-world use cases including firmware parameter storage and configuration retention in power-constrained systems.
Technical Context
The 24AA08/SN implements a two-wire I²C interface with fixed 4-bit device code '1010', block-select addressing (B1/B0 bits), and R/W bit control. Its internal architecture includes a 16-byte page latch, HV generator for EEPROM programming, and address pointer that auto-increments during sequential reads.
It supports three read modes (current address, random, sequential) and two write modes (byte and page), with ACK polling used to detect write completion. The WP pin enables full-array hardware write protection when tied to VCC, and SDA/SCL inputs include Schmitt triggers and 50 ns spike filtering for robust bus operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (four 256 × 8-bit blocks), enabling storage of up to 1024 bytes of persistent configuration data. |
| VCC Range | 1.7V–5.5V - supports direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifting. |
| Max Clock Frequency | 400 kHz at VCC ≥ 2.5V; 100 kHz at 1.7V ≤ VCC < 2.5V - ensures reliable I²C communication across low-voltage battery-powered designs. |
| Write Cycle Time | ≤5 ms per byte or page - defines minimum delay before initiating next I²C transaction after write command. |
| Endurance | 1,000,000 erase/write cycles - guarantees long-term reliability in frequently updated parameter storage (e.g., calibration offsets). |
| Data Retention | >200 years at +85°C - ensures nonvolatile data integrity over full product lifecycle in industrial environments. |
| Standby Current | 1 µA maximum (I-temp.) - minimizes quiescent power draw in always-on IoT edge nodes and energy-harvesting systems. |
Pinout & Package
24AA08/SN is supplied in an 8-Lead Plastic Small Outline (SN) package - narrow body, 3.90 mm width, 1.27 mm pitch, surface-mountable with gull-wing leads. Pin 1 is marked by a beveled corner or notch on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS | Ground reference | Return path for all internal circuitry; must be connected to system ground plane for stable I²C signaling and ESD discharge. |
| WP | Hardware write-protect input | When pulled high to VCC, disables all write operations to the entire 8-Kbit array; tied low to enable full read/write access. |
| SCL | Serial clock input | Asynchronous master-generated clock synchronizing all I²C transfers; requires external pull-up resistor (2 kΩ typical for 400 kHz). |
| SDA | Bidirectional data I/O | Open-drain line shared among multiple I²C devices; requires external pull-up and supports multi-master arbitration. |
| VCC | Power supply | Primary supply rail (1.7–5.5V); decoupling capacitor (0.1 µF ceramic) required within 10 mm of pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| 16-byte page write buffer | Enables burst writes of up to 16 bytes within one I²C transaction, reducing bus overhead and improving firmware update efficiency. |
| Schmitt-trigger inputs on SDA/SCL | Provides hysteresis (≥0.05×VCC) to reject noise spikes and prevent false Start/Stop detection on electrically noisy PCBs. |
| Output slope control | Slows signal edges to suppress ground bounce during switching, eliminating signal integrity issues in dense mixed-signal layouts. |
| Hardware write-protect (WP) | Physically disables memory writes without software intervention - critical for safeguarding factory-calibrated parameters against accidental overwrite. |
| ESD protection >4 kV | Meets IEC 61000-4-2 Level 3 requirements, allowing safe handling and board-level integration without additional transient protection. |
Applications
| Industrial Sensor Calibration | Embedded Firmware Parameter Storage |
|---|---|
Use Scenario: Storing temperature-compensation coefficients and offset values for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding calibrated constants accessed at boot time by MCU firmware. Use Value: Enables field-replaceable sensor modules with unique calibration data retained across power cycles and firmware updates. | Use Scenario: Saving user-configurable settings (e.g., display brightness, communication baud rate, alarm thresholds) in medical diagnostic equipment. IC Role / Device Role / Timing Role: I²C slave device providing persistent storage independent of main processor's flash lifetime limitations. Use Value: Supports 1M+ write cycles - far exceeding typical MCU flash endurance - ensuring reliable setting retention over 10+ years of clinical use. |
| Power Meter Configuration Backup | Smart Home Device Identity Storage |
Use Scenario: Retaining tariff schedules, CT ratio settings, and meter ID in ANSI C12.20-compliant electricity meters during brownout events. IC Role / Device Role / Timing Role: Low-voltage (1.7V) EEPROM maintaining critical billing parameters even during grid voltage sag below 2.5V. Use Value: Guarantees uninterrupted configuration retention during 1.7–2.5V brownout windows where higher-VCC EEPROMs would fail. | Use Scenario: Holding unique MAC address, encryption keys, and device model variant codes in Zigbee-enabled smart thermostats. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage element with hardware write-protection preventing unauthorized key modification. Use Value: WP pin allows permanent locking of cryptographic keys post-manufacturing, meeting PSA Level 1 secure element requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC08B/SN | Requires minimum 2.5V VCC; no 1.7V operation; same 400 kHz speed and 8-Kbit organization. | Not suitable for 1.8V systems; otherwise identical use cases in industrial controls and consumer electronics. | Select only if system VCC is guaranteed ≥2.5V and 1.7V compatibility is unnecessary. |
| 24FC08/SN | Supports 1 MHz I²C clock (vs. 400 kHz); same 1.7V–5.5V range and 8-Kbit capacity. | Enables faster configuration loading in high-throughput test fixtures or real-time control loops requiring sub-millisecond EEPROM access. | Choose when system clock budget allows 1 MHz I²C and faster write throughput is prioritized over cost. |
Compared with 24LC08B/SN, the 24AA08/SN adds 1.7V operation for ultra-low-power designs; compared with 24FC08/SN, it trades 1 MHz speed for broader legacy I²C controller compatibility and lower cost in volume production.
Availability
24AA08/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded firmware parameter storage, and power meter configuration backup requiring stable component supply, long-term obsolescence management, and RoHS-compliant sourcing.
Supply support for 24AA08/SN 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 Inc. is a leading provider of microcontroller, analog, and Flash-IP solutions, serving automotive, industrial, and consumer markets with high-reliability silicon and development tools.
The 24AA08 belongs to Microchip's 24XX08 family of I²C serial EEPROMs, designed specifically for low-voltage, low-power embedded systems needing robust, long-life nonvolatile storage with minimal board space and BOM count.
FAQ
What is the minimum VCC required for reliable operation of the 24AA08/SN?
The 24AA08/SN operates reliably down to 1.7V across its full industrial temperature range (–40°C to +85°C), making it compatible with 1.8V logic families and battery-powered systems experiencing voltage sag. Below 1.7V, read/write functionality is not guaranteed per DS20001710M specifications.
Does the 24AA08/SN support standard I²C addressing modes?
Yes, the 24AA08/SN uses a fixed 4-bit device identifier '1010' followed by two block-select bits (B1/B0) and a R/W bit, forming a 7-bit client address. It does not use A0/A1/A2 pins - they are unconnected and may be left floating or tied to VSS/VCC without effect on addressing.
How does the WP pin function on the 24AA08/SN in the SOIC-8 (SN) package?
On the 24AA08/SN in SN package, the WP pin (Pin 7) provides hardware-level write protection: tying it to VCC disables all write operations to the full 8-Kbit array while permitting unrestricted reads; tying it to VSS enables full read/write access. This feature is fully implemented in SOIC-8 and does not apply to CSP variants.
What is the maximum page write size supported by the 24AA08/SN?
The 24AA08/SN supports a 16-byte page write buffer. When performing a page write, up to 16 consecutive bytes can be loaded into the buffer and written to memory upon receipt of the Stop condition. Writes crossing physical page boundaries (every 16 bytes) wrap within the current page rather than advancing to the next.
Is the 24AA08/SN qualified for automotive applications?
No, the 24AA08/SN is rated for industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. For automotive use, Microchip offers the 24AA08 in A-grade packages (e.g., 24AA08-I/SM) or recommends the AEC-Q100-qualified 24AA08T-I/SN variant with extended qualification testing.
24AA08/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 256 x 8 x 4
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24AA08/SN FAQ
1.How can I place an order for 24AA08/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA08/SN 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 24AA08/SN reliable?
The price and inventory of 24AA08/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA08/SN is usually 5 days.
3.What payment methods are accepted for 24AA08/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA08/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA08/SN?
24AA08/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA08/SN 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 24AA08/SN?
For technical support, including 24AA08/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA08/SN requirements.
6.How does Aetrix verify that 24AA08/SN is sourced from the original manufacturer or authorized distributors?
All 24AA08/SN 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 24AA08/SN meets industry standards.
7.What is the process for return or replacement of 24AA08/SN?
All 24AA08/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24AA08/SN, 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 24AA08/SN part is unused and in its original packaging.
Return procedure for 24AA08/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24AA08/SN Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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