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Microchip Technology 24LC16BT-E/ST
- Part No.:
- 24LC16BT-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC16BT-E/ST.pdf
- Description:
- IC EEPROM 16KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,016
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Product details
Overview
24LC16BT-E/ST from Microchip Technology Inc. is a 16-Kbit I²C-compatible serial EEPROM organized as eight 256 × 8-bit blocks, operating at 2.5V–5.5V with 400 kHz max clock frequency and industrial/extended temperature range (–40°C to +125°C). It features hardware write-protection via the WP pin, 16-byte page write buffer, and Schmitt-trigger inputs for noise immunity - deployed in embedded system configuration storage and sensor calibration data retention.
For engineers reviewing the 24LC16BT-E/ST datasheet, 24LC16BT-E/ST pinout, 24LC16BT-E/ST application, or 24LC16BT-E/ST equivalent, key selection criteria include VCC compatibility (2.5V min), extended-temp operation, SOIC-8 packaging, I²C timing compliance at 400 kHz, and hardware write-protect functionality.
Technical Context
The 24LC16BT-E/ST functions as an I²C slave device with fixed 4-bit control code '1010' and 3-bit block-select addressing, supporting up to eight 256-word memory blocks. Its internal Address Pointer auto-increments during sequential reads and page writes, enabling efficient multi-byte transfers without repeated address retransmission.
It implements self-timed erase/write cycles with 5 ms maximum page write time, uses open-drain SDA/SCL with external pull-ups, and incorporates on-chip slope control and Schmitt-trigger inputs to suppress ground bounce and bus noise - critical for reliable operation in electrically noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 × 8-bit), organized as eight 256-word blocks for hierarchical addressing |
| VCC Range | 2.5V to 5.5V - requires ≥2.5V supply; not functional below 2.5V unlike 24AA16/24FC16 variants |
| Max Clock Frequency | 400 kHz - supports standard/fast-mode I²C; no 1 MHz capability (reserved for 24FC16) |
| Page Write Buffer | 16 bytes - enables burst writes within a single physical page (0–15, 16–31, etc.), avoiding wraparound if boundary-crossing is prevented in firmware |
| Write Protection | Hardware-enabled via WP pin - tied to VCC disables all writes; tied to VSS enables full read/write access |
| Endurance & Retention | 1 million erase/write cycles and >200 years data retention - validated at 25°C/5.5V; derated at elevated temperature/voltage |
| Temp Range | –40°C to +125°C (Extended grade) - qualified per AEC-Q100 for automotive under-hood use |
Pinout & Package
24LC16BT-E/ST is supplied in an 8-lead SOIC (SN) package (3.90 mm body width), with exposed pad unconnected per Microchip's marking and packaging documentation. Pin 1 is marked by a notch or bevel; pin numbering follows standard SOIC convention (counterclockwise from top-left corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS | Ground reference | Primary return path for all internal circuitry; must be low-impedance connection to system GND plane |
| WP | Write-protect input | Logic-high (VCC) disables all write operations; logic-low (VSS) enables full memory access |
| SCL | Serial clock input | Master-generated clock synchronizing all I²C transactions; open-drain, requires external pull-up |
| SDA | Serial data I/O | Bidirectional open-drain bus line; shared by multiple I²C devices; requires 2 kΩ pull-up for 400 kHz operation |
| VCC | Power supply | 2.5V–5.5V DC input; bypass capacitor (0.1 μF ceramic) required near pin for noise suppression |
| A0, A1, A2 | No-connect terminals | Internally unconnected; may be left floating, tied to VSS, or tied to VCC - no effect on operation |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Ensures robust noise immunity on SCL/SDA lines with 0.05×VCC hysteresis - eliminates false triggering in EMI-prone environments |
| Output slope control | Slows signal edge rates on SDA/SCL to suppress ground bounce and reduce EMI emissions during switching |
| Self-timed write cycle | Eliminates need for external write-cycle timing control; host can poll ACK to detect completion instead of fixed delays |
| ESD protection | ≥4 kV HBM rating on all pins - reduces risk of field failure during handling or system integration |
| RoHS & AEC-Q100 | Compliant with automotive reliability standards and environmental regulations - suitable for production automotive ECUs |
Applications
| Industrial PLC Configuration Storage | Automotive Sensor Calibration Data |
|---|---|
Use Scenario: Storing user-defined I/O mapping, alarm thresholds, and communication parameters in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed infrequently via I²C during power-up or maintenance mode. Use Value: Enables field-reprogrammable settings without requiring MCU flash reprogramming; retains data across 10+ year deployments. | Use Scenario: Recording factory-calibrated offset/gain coefficients for temperature, pressure, and position sensors in engine control units. IC Role / Device Role / Timing Role: Persistent parameter store written once during end-of-line test and read at every cold boot. Use Value: Maintains accuracy over lifetime and temperature extremes; AEC-Q100 qualification ensures reliability under under-hood thermal cycling. |
| Medical Device Setup Profiles | Smart Meter Firmware Patch Storage |
Use Scenario: Saving clinician-selected operational modes, alarm limits, and patient-specific therapy parameters in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for regulatory-compliant audit trails and configuration history. Use Value: Hardware write-protection (WP pin) prevents accidental or malicious overwrite of safety-critical settings. | Use Scenario: Holding small firmware patches or security keys updated remotely in utility smart meters deployed in harsh outdoor environments. IC Role / Device Role / Timing Role: Field-upgradable nonvolatile storage accessible via isolated I²C interface during secure OTA updates. Use Value: Extended –40°C to +125°C operation ensures reliable patch storage even inside sealed meter enclosures exposed to desert heat or arctic cold. |
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/ST | Lower VCC min (1.7V), same 400 kHz speed, Industrial temp only (–40°C to +85°C) | Not qualified for extended-temp or automotive use; suitable for battery-powered consumer devices | Select when 1.7V operation is required and extended temperature is unnecessary |
| 24FC16T-E/ST | Supports 1 MHz I²C, same VCC range (1.7V–5.5V), identical package and pinout | Enables faster firmware loading in high-throughput test systems; requires tighter AC timing compliance | Select when higher throughput justifies redesign for 1 MHz bus timing and layout |
Compared with 24AA16T-I/ST, the 24LC16BT-E/ST trades 1.7V operation for extended temperature and automotive qualification; compared with 24FC16T-E/ST, it sacrifices 1 MHz speed for guaranteed compatibility with legacy 400 kHz I²C masters and simpler timing margining.
Availability
24LC16BT-E/ST is available at Aetrix Electronics and suitable for industrial PLCs, automotive ECUs, medical diagnostics, and smart metering applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-qualified nonvolatile memory.
Supply support for 24LC16BT-E/ST 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, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24LC16B family delivers cost-optimized, I²C-based serial EEPROMs targeting industrial control, automotive subsystems, and consumer electronics where extended temperature operation and hardware write protection are essential.
FAQ
What is the minimum supply voltage required for reliable operation of the 24LC16BT-E/ST?
The 24LC16BT-E/ST requires a minimum VCC of 2.5V for guaranteed operation across its full extended temperature range (–40°C to +125°C). Unlike the 24AA16 variant, it is not specified for operation below 2.5V - attempting to power the 24LC16BT-E/ST at 1.8V will result in undefined behavior or functional failure. Always verify VCC remains within 2.5V–5.5V during all operating conditions.
Does the 24LC16BT-E/ST support 1 MHz I²C communication?
No, the 24LC16BT-E/ST is rated for a maximum clock frequency of 400 kHz. The 1 MHz capability is exclusive to the 24FC16 variant within this family. Attempting to run the 24LC16BT-E/ST at 1 MHz violates its AC specifications and may cause data corruption, missed ACKs, or bus lockup. For 1 MHz designs, select the 24FC16T-E/ST instead.
How does the WP pin function on the 24LC16BT-E/ST, and what happens when it is left unconnected?
The WP pin on the 24LC16BT-E/ST is a dedicated hardware write-protect input: tying it to VCC disables all write operations (including byte/page writes), while tying it to VSS enables full read/write access. The datasheet explicitly states that A0–A2 are no-connects, but WP is active and must be intentionally biased - leaving WP floating risks indeterminate logic level and unpredictable write-enable state. Always tie WP to a defined rail.
Can the 24LC16BT-E/ST be used in automotive applications, and what qualifications does it hold?
Yes, the 24LC16BT-E/ST is qualified to AEC-Q100 Grade 1 (–40°C to +125°C) and is RoHS compliant, making it suitable for automotive applications including engine control, body electronics, and ADAS sensor modules. Its extended temperature rating, 1 million endurance cycles, and >200-year data retention are validated under automotive stress conditions - confirming suitability for under-hood and cabin-mounted ECUs.
What package type does the '-E/ST' suffix indicate for the 24LC16BT-E/ST?
Per Microchip's packaging nomenclature, the '-ST' suffix denotes the 8-lead SOIC (Small Outline Integrated Circuit) package with 3.90 mm body width (JEDEC MS-012, Microchip drawing C04-057-SN). The '-E' indicates Extended temperature grade (–40°C to +125°C). This SOIC-8 package is surface-mount compatible, widely supported by PCB assembly processes, and pin-compatible with other members of the 24XX16 family in the same footprint.
24LC16BT-E/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC16BT-E/ST FAQ
1.How can I place an order for 24LC16BT-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC16BT-E/ST 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-E/ST reliable?
The price and inventory of 24LC16BT-E/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC16BT-E/ST is usually 5 days.
3.What payment methods are accepted for 24LC16BT-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC16BT-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC16BT-E/ST?
24LC16BT-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC16BT-E/ST 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-E/ST?
For technical support, including 24LC16BT-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC16BT-E/ST requirements.
6.How does Aetrix verify that 24LC16BT-E/ST is sourced from the original manufacturer or authorized distributors?
All 24LC16BT-E/ST 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-E/ST meets industry standards.
7.What is the process for return or replacement of 24LC16BT-E/ST?
All 24LC16BT-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC16BT-E/ST, 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-E/ST part is unused and in its original packaging.
Return procedure for 24LC16BT-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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