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Microchip Technology 24LC16B-I/SN
- Part No.:
- 24LC16B-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24LC16B-I/SN.pdf
- Description:
- IC EEPROM 16KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,551
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Product details
Overview
24LC16B-I/SN from Microchip Technology Inc. is a 16-Kbit I²C-compatible serial EEPROM organized as eight 256 × 8-bit memory blocks. It operates from 2.5V to 5.5V, supports up to 400 kHz clock frequency, features hardware write-protection via the WP pin, and delivers ≤1 μA standby current at industrial temperature (–40°C to +85°C). It is widely used in embedded system configuration storage, sensor calibration data retention, and power-fail-safe parameter backup.
For engineers reviewing the 24LC16B-I/SN datasheet, 24LC16B-I/SN pinout, 24LC16B-I/SN application, or 24LC16B-I/SN equivalent, key selection considerations include VCC range compatibility (2.5–5.5V), 400 kHz I²C timing compliance, SOIC-8 package footprint, hardware write-protect functionality, and guaranteed 1 million erase/write cycles with >200-year data retention.
Technical Context
The 24LC16B-I/SN functions as an I²C slave device with fixed 4-bit control code '1010' and 3-bit block-select addressing, enabling access to eight independent 256-byte memory blocks. Its internal architecture includes a 16-byte page write buffer, Schmitt-triggered SDA/SCL inputs for noise immunity, and slope-controlled outputs to suppress ground bounce.
Write operations are self-timed with a maximum 5 ms cycle time; read operations support current-address, random, and sequential modes. The device uses acknowledge polling to signal write completion and incorporates an internal Address Pointer that auto-increments during sequential reads or writes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 bytes), organized as eight 256 × 8-bit blocks - enables modular firmware or calibration data partitioning |
| VCC Range | 2.5V to 5.5V - compatible with 3.3V and 5V logic systems without level-shifting |
| Max Clock Frequency | 400 kHz - supports standard-mode I²C bus timing with full backward compatibility to 100 kHz |
| Page Write Buffer | 16 bytes - reduces I²C transaction overhead when updating contiguous configuration data |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in field-updatable systems |
| Data Retention | >200 years - guarantees nonvolatile storage integrity across product lifecycle without refresh |
| Standby Current | ≤1 μA at –40°C to +85°C - minimizes quiescent power in battery-backed or energy-constrained designs |
Pinout & Package
24LC16B-I/SN is supplied in an 8-lead narrow-body SOIC (SN) package per Microchip drawing C04-057-SN Rev E, with 1.27 mm pitch, 3.90 mm body width, and 4.90 mm overall length. Pin 1 is marked by a beveled corner or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS (Pin 4) | Ground reference | Common return path for all internal circuitry; must be connected to system GND |
| WP (Pin 7) | Hardware write-protect input | Tied to VCC to disable all writes (read-only mode); tied to VSS to enable full read/write access |
| SCL (Pin 6) | Serial clock input | Open-drain input synchronized to master-generated I²C clock; requires external pull-up resistor |
| SDA (Pin 5) | Serial data I/O | Bidirectional open-drain line for address/data transfer; requires external pull-up resistor |
| VCC (Pin 8) | Power supply | Primary supply rail (2.5–5.5V); decoupling capacitor recommended within 10 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Ensures robust I²C communication on noisy PCBs or long traces by rejecting sub-threshold noise spikes |
| Output slope control | Prevents ground bounce-induced glitches during SDA/SCL transitions, improving signal integrity |
| Hardware write protection | Physically disables write operations via WP pin-no software lock required for critical configuration security |
| Page write capability | Enables burst writes of up to 16 bytes within a single I²C transaction, reducing bus arbitration overhead |
| ESD protection | >4 kV HBM - enhances handling robustness and system-level ESD resilience without external protection |
Applications
| Industrial Sensor Calibration Storage | Embedded System Configuration Backup |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent calibration parameters accessed at power-on reset. Use Value: Eliminates need for external calibration hardware; retains accuracy across 200+ years without maintenance or refresh. | Use Scenario: Saving user-modified settings (e.g., display brightness, network IP, alarm thresholds) in medical diagnostic equipment. IC Role / Device Role / Timing Role: I²C slave storing volatile runtime parameters to survive unexpected AC power loss. Use Value: Guarantees zero data loss during brownout events; supports 1M+ write cycles for frequent UI adjustments. |
| Power-Fail Safe Parameter Retention | IoT Edge Device Identity & Key Storage |
Use Scenario: Capturing last-known operational state (motor position, valve status, fault log) before shutdown in HVAC controllers. IC Role / Device Role / Timing Role: Fast-write-capable EEPROM interfaced directly to microcontroller's I²C peripheral during power-fail interrupt. Use Value: 5 ms max write cycle enables reliable save-to-flash within capacitor-holdup time (typically 10–50 ms). | Use Scenario: Securing device-specific identifiers (MAC, serial number) and symmetric keys in smart meter firmware. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile memory with hardware write-lock (WP = VCC) preventing accidental overwrites. Use Value: Prevents unauthorized reprogramming of identity fields while allowing read access for secure boot verification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA16-I/SN | Wider VCC range (1.7–5.5V); supports 100 kHz at VCC < 2.5V; same 16-Kbit capacity and SOIC-8 package | Preferred for 1.8V/2.5V systems where 24LC16B-I/SN cannot operate below 2.5V | Select 24AA16-I/SN only if supply voltage may dip below 2.5V; otherwise 24LC16B-I/SN offers identical functionality at lower cost |
| AT24C16C-SSHM-T | Same 16-Kbit size, SOIC-8, I²C interface; rated for 1.7–5.5V; endurance 400k cycles (vs. 1M for 24LC16B-I/SN) | Lower endurance makes it less suitable for high-frequency logging or field-upgrade scenarios | Choose AT24C16C-SSHM-T only for cost-sensitive, low-write-count applications where 400k cycles suffice |
Compared with 24AA16-I/SN and AT24C16C-SSHM-T, the 24LC16B-I/SN provides optimal balance of industrial temperature operation, 1-million-cycle endurance, and hardware write protection-making it the preferred choice for mission-critical configuration storage where voltage stability ≥2.5V is assured.
Availability
24LC16B-I/SN is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and IoT edge device design requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for 24LC16B-I/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 microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24LC16B belongs to Microchip's legacy serial EEPROM product line, engineered specifically for reliable, low-power, I²C-based nonvolatile data storage in space-constrained embedded systems.
FAQ
What is the minimum operating voltage for the 24LC16B-I/SN?
The 24LC16B-I/SN requires a minimum VCC of 2.5V, as specified in its electrical characteristics table. Unlike the 24AA16 variant, it is not rated for operation below 2.5V-even at reduced clock speeds. Operating the 24LC16B-I/SN below 2.5V may result in unreliable write cycles or communication failure. Always verify system rail stability within the 2.5–5.5V range before deployment.
Does the 24LC16B-I/SN support page writes across memory boundaries?
No-the 24LC16B-I/SN restricts page writes to within a single 16-byte physical page boundary. If a page write command attempts to cross a boundary (e.g., writing from address 0x0F to 0x10), data wraps to the start of the current page instead of advancing to the next. Application firmware must explicitly manage address alignment to avoid unintended overwrites. This behavior is inherent to the 24LC16B-I/SN's internal page latch architecture.
How does the WP pin function on the 24LC16B-I/SN?
On the 24LC16B-I/SN, the WP (Write-Protect) pin is a logic-level input: tying it to VCC disables all write operations (including byte and page writes) across the full 000–7FF address range, while leaving read operations fully functional. Tying WP to VSS enables normal read/write access. No internal pull-up/down is present-external connection is mandatory for deterministic behavior.
Can the 24LC16B-I/SN be used in automotive applications?
The base 24LC16B-I/SN is qualified for industrial temperature (–40°C to +85°C) and is not AEC-Q100 certified. While Microchip offers AEC-Q100-qualified variants (e.g., 24LC16BT-I/SN with 'T' suffix), the 24LC16B-I/SN itself is intended for industrial and commercial use only. For automotive ECUs or ADAS modules, select the explicitly qualified part number to ensure compliance with automotive reliability and qualification requirements.
What is the maximum I²C clock frequency supported by the 24LC16B-I/SN?
The 24LC16B-I/SN supports a maximum I²C clock frequency of 400 kHz under all valid operating conditions (VCC = 2.5–5.5V, TA = –40°C to +85°C). It does not support 1 MHz operation-that capability is exclusive to the 24FC16 family. Attempting 1 MHz communication with the 24LC16B-I/SN will result in timing violations and bus errors.
24LC16B-I/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:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 16Kbit
- Memory Organization:
- 2K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24LC16B-I/SN FAQ
1.How can I place an order for 24LC16B-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC16B-I/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 24LC16B-I/SN reliable?
The price and inventory of 24LC16B-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC16B-I/SN is usually 5 days.
3.What payment methods are accepted for 24LC16B-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC16B-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC16B-I/SN?
24LC16B-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC16B-I/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 24LC16B-I/SN?
For technical support, including 24LC16B-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC16B-I/SN requirements.
6.How does Aetrix verify that 24LC16B-I/SN is sourced from the original manufacturer or authorized distributors?
All 24LC16B-I/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 24LC16B-I/SN meets industry standards.
7.What is the process for return or replacement of 24LC16B-I/SN?
All 24LC16B-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24LC16B-I/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 24LC16B-I/SN part is unused and in its original packaging.
Return procedure for 24LC16B-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC16B-I/SN Tags
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AT21CS01-STUM10-T
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