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Microchip Technology 24LC16BT-I/OTG
- Part No.:
- 24LC16BT-I/OTG
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SC-74A, SOT-753
- Datasheet:
-
24LC16BT-I/OTG.pdf
- Description:
- IC EEPROM 16KBIT I2C SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,727
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Product details
Overview
24LC16BT-I/OTG from Microchip Technology Inc. is a 16-Kbit I²C-compatible serial EEPROM organized as eight 256 × 8-bit blocks, operating from 2.5V to 5.5V with 400 kHz max clock frequency, 5 ms max page write time, and industrial temperature range (–40°C to +85°C). It features hardware write-protection via the WP pin and supports up to 16-byte page writes in embedded microcontroller systems for configuration storage.
For engineers reviewing the 24LC16BT-I/OTG datasheet, 24LC16BT-I/OTG pinout, 24LC16BT-I/OTG application, or 24LC16BT-I/OTG equivalent, this page delivers verified electrical specs, SOIC-8/TSSOP-8 pin mapping, I²C timing compliance, endurance (1M cycles), and real-world use cases in power management, sensor calibration, and firmware parameter retention.
Technical Context
The 24LC16BT-I/OTG implements a two-wire I²C slave interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal architecture includes an 8-bit address pointer, 16-byte page latch buffer, and HV generator for EEPROM programming - enabling self-timed erase/write cycles without external high-voltage supply.
It supports standard I²C addressing with fixed 4-bit control code '1010', 3-bit block-select bits (B2–B0), and R/W bit - allowing selection of one of eight 256-word memory blocks. Acknowledge polling is supported to detect write completion, and the device remains non-responsive during internal write cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 × 8-bit), organized as eight 256-word blocks - enables modular data partitioning for multi-function devices. |
| VCC Range | 2.5V to 5.5V - compatible with 3.3V and 5V logic systems; excludes sub-2.5V operation unlike 24AA16/24FC16 variants. |
| Max Clock Frequency | 400 kHz - supports fast I²C mode; not rated for 1 MHz (reserved for 24FC16) or 100 kHz-only low-voltage operation. |
| Page Write Buffer | 16 bytes - allows burst writes within a single physical page boundary (0–15, 16–31, etc.), reducing bus overhead vs. byte writes. |
| Write Cycle Time | 5 ms maximum - defines worst-case latency before next I²C transaction; impacts real-time system responsiveness. |
| Endurance & Retention | 1,000,000 erase/write cycles and >200 years data retention - validated at 25°C/5.5V; suitable for field-updatable calibration tables. |
| ESD Protection | >4,000V HBM - ensures robustness against handling and board-level ESD events in industrial environments. |
Pinout & Package
24LC16BT-I/OTG is supplied in 8-lead SOIC (SN) and TSSOP (ST) packages per Microchip's Device Selection Table. Both are surface-mount, lead-free, RoHS-compliant packages with identical pinout and thermal characteristics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS | Ground reference | Return path for all internal circuitry; must be connected to system GND with low-impedance trace. |
| WP | Hardware write-protect input | Logic-high (VCC) disables all write operations; logic-low (VSS) enables full read/write access - no software lock required. |
| SCL | Serial clock input | Asynchronous I²C clock signal; master-generated; used to synchronize address/data transfer timing. |
| SDA | Serial data bidirectional I/O | Open-drain bus line requiring external pull-up (2–10 kΩ); carries slave address, word address, and data bytes. |
| VCC | Power supply | Primary supply rail (2.5–5.5V); decoupling capacitor (0.1 μF) recommended near pin for noise immunity. |
| A0, A1, A2 | No-connect terminals | Internally unconnected; may be left floating or tied to VSS/VCC - no effect on device function or addressing. |
Key Features
| Feature | Design Value |
|---|---|
| Two-wire I²C interface | Reduces PCB routing complexity and pin count vs. SPI; compatible with standard I²C masters including MCU peripherals and PMICs. |
| Schmitt-trigger inputs | Enables reliable operation on noisy buses by rejecting sub-threshold voltage transients on SCL/SDA lines. |
| Output slope control | Minimizes ground bounce and EMI during signal transitions - critical for mixed-signal systems with sensitive analog sections. |
| Page write capability | 16-byte buffer reduces I²C transaction count by up to 16× vs. byte writes, improving bus efficiency in firmware update or logging applications. |
| Hardware write-protection | Physical WP pin prevents accidental overwrites during power-up/down or firmware faults - eliminates need for software-based protection schemes. |
Applications
| Power Management Unit Calibration | Industrial Sensor Node Configuration |
|---|---|
Use Scenario: Storing trim values for DC-DC converter feedback resistors and startup thresholds across production batches. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed during power-on initialization via I²C; no timing-critical reads during runtime. Use Value: Enables factory calibration without modifying firmware; supports field recalibration using same I²C interface used for monitoring. | Use Scenario: Holding sensor-specific offset/gain coefficients and measurement scaling parameters in wireless environmental monitors. IC Role / Device Role / Timing Role: Slave EEPROM providing persistent parameter set to host MCU during boot; accessed infrequently but must survive 10+ years of field deployment. Use Value: Eliminates need for reprogramming firmware per sensor unit; allows dynamic coefficient updates via host command without flash wear concerns. |
| Firmware Parameter Backup | Consumer Appliance User Settings |
Use Scenario: Backing up runtime-modifiable firmware variables (e.g., PID loop gains, fault counters) before MCU reset or brownout. IC Role / Device Role / Timing Role: Low-latency, byte-addressable storage synchronized with MCU state machine; write occurs only after critical variable change detection. Use Value: Prevents loss of operational history and tuning data across unexpected power loss; leverages 1M-cycle endurance for frequent updates. | Use Scenario: Retaining user preferences (brightness, timer, language) in smart home appliances between AC power cycles. IC Role / Device Role / Timing Role: Standalone I²C slave storing <1 KB of static settings; accessed once per power-on and on user input change. Use Value: Provides cost-effective, pin-efficient nonvolatile storage without requiring MCU internal flash allocation or wear-leveling logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA16T-I/OT | Wider VCC range (1.7–5.5V); supports 100 kHz at 1.7–2.49V; otherwise identical pinout, timing, and memory map. | Required for battery-powered systems operating below 2.5V; not suitable if strict 2.5V minimum is enforced by system design. | Select when ultra-low-voltage operation is needed; verify I²C pull-up resistor value matches lower VCC for timing compliance. |
| 24LC16B-I/P | Same electrical specs and functionality, but in 8-lead PDIP package instead of SOIC/TSSOP; identical marking and temperature grade. | Used in through-hole prototyping or legacy board designs where SOIC footprint is unavailable. | Choose for hand-soldered evaluation or repair; note larger footprint and higher thermal resistance vs. surface-mount variants. |
Compared with 24LC16BT-I/OTG, the 24AA16T-I/OT extends voltage flexibility at the cost of reduced low-VCC speed, while the 24LC16B-I/P offers identical performance in a through-hole package - making both viable alternatives depending on voltage requirements or assembly method.
Availability
24LC16BT-I/OTG is available at Aetrix Electronics and suitable for industrial automation, sensor calibration, and embedded firmware parameter storage requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 24LC16BT-I/OTG 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 family was designed specifically for cost-sensitive, space-constrained embedded systems needing reliable, low-power I²C EEPROM storage - targeting applications in power supplies, consumer electronics, and industrial controls.
FAQ
What is the maximum clock frequency supported by the 24LC16BT-I/OTG?
The 24LC16BT-I/OTG supports a maximum I²C clock frequency of 400 kHz across its full operating voltage range (2.5V–5.5V). It is not rated for 1 MHz operation - that capability is exclusive to the 24FC16 variant. Timing parameters such as THIGH, TLOW, and TSU:DAT are specified for 400 kHz at 2.5–5.5V, ensuring interoperability with standard fast-mode I²C masters.
Does the 24LC16BT-I/OTG require external pull-up resistors on SDA and SCL lines?
Yes, the 24LC16BT-I/OTG requires external pull-up resistors on both SDA and SCL lines because it uses open-drain outputs. Recommended values are 2 kΩ for 400 kHz operation and 10 kΩ for 100 kHz. The exact value depends on bus capacitance and desired rise time; Microchip's datasheet specifies TR ≤ 300 ns at 2.5–5.5V, guiding resistor selection to meet I²C specification limits.
Can the A0, A1, and A2 pins on the 24LC16BT-I/OTG be used to configure device addressing?
No - the A0, A1, and A2 pins on the 24LC16BT-I/OTG are not internally connected and serve no functional purpose. They may be left floating or tied to VSS or VCC without affecting operation. Device addressing is fixed: the 24LC16BT-I/OTG responds only to the 7-bit slave address 0x50 (1010000b) with R/W bit appended, as defined by its 4-bit control code '1010' and hardwired block-select bits.
How does hardware write-protection work on the 24LC16BT-I/OTG?
Hardware write-protection on the 24LC16BT-I/OTG is controlled by the WP pin: when tied to VCC, all write operations (byte and page) to the entire 2048-byte memory array are inhibited, while read operations remain fully functional. When WP is tied to VSS, normal read/write access is enabled. This provides fail-safe protection against unintended writes during power transitions or firmware errors - no register configuration is required.
What is the page write boundary size for the 24LC16BT-I/OTG, and why does it matter?
The 24LC16BT-I/OTG has a 16-byte page write boundary - meaning valid page writes must stay within addresses aligned to multiples of 16 (e.g., 0x00–0x0F, 0x10–0x1F). Crossing a boundary causes wraparound within the current page, overwriting earlier bytes. This matters because application firmware must calculate and split multi-byte writes across boundaries to avoid data corruption - a constraint not present in byte-write-only EEPROMs.
24LC16BT-I/OTG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not 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:
- SOT-23-5
24LC16BT-I/OTG FAQ
1.How can I place an order for 24LC16BT-I/OTG through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC16BT-I/OTG 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 24LC16BT-I/OTG reliable?
The price and inventory of 24LC16BT-I/OTG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC16BT-I/OTG is usually 5 days.
3.What payment methods are accepted for 24LC16BT-I/OTG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC16BT-I/OTG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC16BT-I/OTG?
24LC16BT-I/OTG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC16BT-I/OTG 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 24LC16BT-I/OTG?
For technical support, including 24LC16BT-I/OTG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC16BT-I/OTG requirements.
6.How does Aetrix verify that 24LC16BT-I/OTG is sourced from the original manufacturer or authorized distributors?
All 24LC16BT-I/OTG 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 24LC16BT-I/OTG meets industry standards.
7.What is the process for return or replacement of 24LC16BT-I/OTG?
All 24LC16BT-I/OTG units undergo pre-shipment inspection (PSI). If there is an issue with 24LC16BT-I/OTG, 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 24LC16BT-I/OTG part is unused and in its original packaging.
Return procedure for 24LC16BT-I/OTG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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