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Microchip Technology 24LC16BHT-I/ST
- Part No.:
- 24LC16BHT-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC16BHT-I/ST.pdf
- Description:
- IC EEPROM 16KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
24LC16BHT-I/ST 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 hardware write-protect for the upper half-array (400h–7FFh). It is used in embedded systems for nonvolatile storage of calibration data, configuration settings, and firmware parameters.
For engineers reviewing the 24LC16BHT-I/ST datasheet, 24LC16BHT-I/ST pinout, 24LC16BHT-I/ST application, or 24LC16BHT-I/ST equivalent, key selection criteria include VCC range compatibility (2.5–5.5V), industrial temperature rating (–40°C to +85°C), SOIC-8 package footprint, half-array write-protection behavior, and I²C timing compliance at 400 kHz.
Technical Context
The 24LC16BHT-I/ST 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 write buffer, and EEPROM array with self-timed erase/write cycles.
It supports three read modes-current address, random, and sequential-and uses acknowledge polling to detect write completion. The WP pin enables hardware-level protection of addresses 400h–7FFh when tied to VCC, while A0–A2 pins are unconnected and may be left floating or tied to VSS/VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 × 8), organized as eight 256-word blocks for block-select addressing |
| VCC Range | 2.5V to 5.5V - ensures compatibility with 3.3V and 5V logic systems without level shifting |
| Max Clock Frequency | 400 kHz - supports standard-mode I²C timing with THIGH ≥ 600 ns and TLOW ≥ 1300 ns |
| Page Write Time | 5 ms maximum - defines worst-case delay before next I²C transaction can begin |
| Write Endurance | 1 million erase/write cycles - guarantees long-term reliability in field-updatable applications |
| Data Retention | 200 years - ensures stored configuration remains valid over full product lifecycle |
| Operating Temp | –40°C to +85°C (Industrial grade) - qualified for use in automotive control modules and industrial PLCs |
Pinout & Package
24LC16BHT-I/ST is supplied in an 8-lead SOIC (SN) package, 3.90 mm body width, with standard JEDEC MS-012AC outline and 1.27 mm pitch. Pin 1 is marked by a notch or dot; pin numbering follows counterclockwise convention from top-left corner.
| 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 | Write-protect input | Logic-high disables writes to upper half-array (400h–7FFh); logic-low enables full-array access |
| SCL | Serial clock input | Asynchronous master-generated clock synchronizing all I²C transfers; requires external pull-up |
| SDA | Serial data I/O | Bidirectional open-drain bus line; requires external pull-up resistor (2 kΩ typical for 400 kHz) |
| VCC | Power supply | Primary power rail; bypass capacitor (0.1 μF ceramic) required within 10 mm of pin |
| A0, A1, A2 | No-connect | Internally unconnected; may be left floating or tied to VSS/VCC without functional impact |
Key Features
| Feature | Design Value |
|---|---|
| Half-array hardware write-protect | Enables secure storage of immutable firmware parameters in upper 8 Kbit while allowing runtime updates to lower 8 Kbit |
| Schmitt-trigger inputs | Provides >50 mV hysteresis on SCL/SDA to reject noise spikes up to 50 ns, improving bus robustness in EMI-prone environments |
| 16-byte page write buffer | Reduces I²C transaction overhead by enabling burst writes of up to 16 bytes per Stop condition, cutting write latency by ~85% vs. byte-write mode |
| Low-power operation | 1 μA max standby current and 1 mA max active read current enable use in battery-backed or energy-harvesting systems |
| I²C timing compliance | Fully compliant with standard-mode (100 kHz) and fast-mode (400 kHz) I²C specifications across full VCC and temperature range |
Applications
| Industrial Sensor Calibration | Automotive Body Control Module |
|---|---|
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 storage accessed during power-on initialization via I²C at 100 kHz. Use Value: Enables field-replaceable sensor modules without reprogramming; write-protection prevents accidental corruption of calibration data. | Use Scenario: Holding seat position memory, mirror presets, and lighting configuration in vehicle door modules. IC Role / Device Role / Timing Role: I²C slave storing user preferences persistently across ignition cycles; accessed during wake-up sequence. Use Value: Supports AEC-Q100 Grade 2 qualification; 200-year data retention ensures settings survive 15+ year vehicle service life. |
| Medical Device Configuration | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Retaining regulatory-compliant device settings (e.g., alarm thresholds, sampling rates) in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure parameter store with WP pin tied to VCC to lock critical safety parameters against software overwrite. Use Value: Hardware-enforced write protection satisfies IEC 62304 Class B software safety requirements for medical firmware integrity. | Use Scenario: Storing delta patches applied to meter firmware during OTA updates to minimize bandwidth usage. IC Role / Device Role / Timing Role: High-endurance EEPROM used for frequent patch writes (up to 10k cycles/year) in utility-grade meters. Use Value: 1 million write cycles and 5 ms page write time support daily patch deployments without wear-out concerns over 10-year deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA16HT-I/ST | Wider VCC range (1.7–5.5V); same 400 kHz speed and SOIC-8 package | Supports 1.8V microcontrollers; not rated for 2.5V-only systems where 24LC16BHT-I/ST is optimized | Select when interfacing with ultra-low-voltage MCUs or mixed-voltage boards requiring 1.7V operation |
| AT24C16C-SSHM-T | Same 16 Kbit size and SOIC-8 package; 1 MHz max clock (vs. 400 kHz); different write-protect scheme (full-array only) | Lacks half-array WP; requires software-managed protection for partial memory locking | Choose for higher-speed I²C buses or when full-array protection suffices and 1 MHz timing is needed |
Compared with 24AA16HT-I/ST, the 24LC16BHT-I/ST offers tighter VCC specification (2.5–5.5V) for improved noise immunity in 3.3V/5V systems, while AT24C16C-SSHM-T trades hardware half-array protection for faster 1 MHz operation - making 24LC16BHT-I/ST optimal for industrial designs requiring deterministic write-locking of configuration space.
Availability
24LC16BHT-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical device configuration, smart energy meter firmware patch storage, and embedded system boot parameter retention requiring stable component supply and long-term lifecycle support.
Supply support for 24LC16BHT-I/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 microcontroller, analog, FPGA, and memory solutions, serving industrial, automotive, and consumer markets with high-reliability semiconductor products.
The 24LC16BHT-I/ST belongs to Microchip's 24XX16H family of I²C EEPROMs, designed specifically for robust, low-power nonvolatile data storage in space-constrained embedded systems requiring guaranteed data integrity and extended endurance.
FAQ
What is the maximum clock frequency supported by the 24LC16BHT-I/ST?
The 24LC16BHT-I/ST supports a maximum I²C clock frequency of 400 kHz under standard operating conditions (VCC = 2.5V to 5.5V, TA = –40°C to +85°C). This is specified in Table 1-2 of the DS20002118B datasheet. Operation above 400 kHz is not guaranteed and may result in timing violations or communication failure. The 24LC16BHT-I/ST does not support 1 MHz operation - that capability is reserved for the 24FC16H variant.
Does the 24LC16BHT-I/ST have internal pull-up resistors on SDA or SCL?
No, the 24LC16BHT-I/ST does not include internal pull-up resistors on SDA or SCL. Both lines require external pull-up resistors to VCC. Typical values are 2 kΩ for 400 kHz operation and 10 kΩ for 100 kHz, as stated in Section 2.2 of the datasheet. Omitting external pull-ups will prevent proper I²C bus operation, as the open-drain outputs cannot drive high without them.
How does the write-protect (WP) pin function on the 24LC16BHT-I/ST?
When the WP pin of the 24LC16BHT-I/ST is tied to VCC, write operations to memory addresses 400h–7FFh (upper 8 Kbit) are inhibited; reads remain fully functional. When WP is tied to VSS (or left floating, though not recommended), full-array write access is enabled. This hardware-based protection is independent of software commands and provides deterministic security for critical configuration data.
What is the page write buffer size of the 24LC16BHT-I/ST?
The 24LC16BHT-I/ST features a 16-byte page write buffer, allowing up to 16 bytes to be loaded into the internal latch before initiating the self-timed write cycle. This enables efficient burst writes within a single I²C transaction, reducing bus overhead and total programming time compared to byte-write mode. Page boundaries align to 16-byte intervals (e.g., 000h–00Fh, 010h–01Fh), and crossing boundaries causes wraparound.
Is the 24LC16BHT-I/ST RoHS compliant and AEC-Q100 qualified?
Yes, the 24LC16BHT-I/ST is RoHS compliant and AEC-Q100 qualified for automotive applications. Per the Device Selection Table and Features section of DS20002118B, it meets AEC-Q100 Grade 2 requirements (–40°C to +105°C ambient) and is listed as "Automotive AEC-Q100 Qualified". The "I" suffix denotes Industrial temperature grade (–40°C to +85°C), and the "T" indicates tape-and-reel packaging - both consistent with automotive supply chain requirements.
24LC16BHT-I/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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC16BHT-I/ST FAQ
1.How can I place an order for 24LC16BHT-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC16BHT-I/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 24LC16BHT-I/ST reliable?
The price and inventory of 24LC16BHT-I/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC16BHT-I/ST is usually 5 days.
3.What payment methods are accepted for 24LC16BHT-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC16BHT-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC16BHT-I/ST?
24LC16BHT-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC16BHT-I/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 24LC16BHT-I/ST?
For technical support, including 24LC16BHT-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC16BHT-I/ST requirements.
6.How does Aetrix verify that 24LC16BHT-I/ST is sourced from the original manufacturer or authorized distributors?
All 24LC16BHT-I/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 24LC16BHT-I/ST meets industry standards.
7.What is the process for return or replacement of 24LC16BHT-I/ST?
All 24LC16BHT-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC16BHT-I/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 24LC16BHT-I/ST part is unused and in its original packaging.
Return procedure for 24LC16BHT-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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