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Microchip Technology 24LC08BHT-E/ST
- Part No.:
- 24LC08BHT-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC08BHT-E/ST.pdf
- Description:
- IC EEPROM 8KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,229
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Product details
Overview
24LC08BHT-E/ST from Microchip Technology Inc. is an 8 Kbit I²C-compatible serial EEPROM organized as four 256 × 8-bit memory blocks, operating from 2.5V to 5.5V with 400 kHz max clock frequency, 16-byte page write buffer, and hardware write-protect for addresses 200h–3FFh. It supports industrial and automotive temperature ranges (−40°C to +125°C) and is used in firmware storage, configuration retention, and calibration data logging in embedded control systems.
For engineers reviewing the 24LC08BHT-E/ST datasheet, 24LC08BHT-E/ST pinout, 24LC08BHT-E/ST application, or 24LC08BHT-E/ST equivalent, this page delivers verified electrical specs, I²C timing compliance, WP-enabled half-array protection, endurance (1M cycles), and RoHS-compliant TSSOP-8 packaging - all confirmed against Microchip DS20002084B.
Technical Context
The 24LC08BHT-E/ST implements a slave-only I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal address pointer auto-increments during sequential reads and wraps within 16-byte physical pages, requiring software boundary management.
Write protection is implemented via the WP pin: tied to VCC, it disables writes to the upper 2 Kbytes (200h–3FFh); tied to VSS, full array access is enabled. The device uses self-timed erase/write cycles with typical 3 ms page write time and no external timing components required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (4 × 256 × 8-bit blocks), enabling compact nonvolatile storage for boot code or device IDs |
| VCC Range | 2.5V to 5.5V - compatible with 3.3V and 5V logic domains without level shifting |
| I²C Clock Speed | Up to 400 kHz (standard/fast-mode), supporting high-throughput configuration updates |
| Page Write Buffer | 16 bytes - reduces bus transactions by up to 16× vs. byte-write for contiguous data |
| Endurance & Retention | 1 million erase/write cycles and >200 years data retention at 25°C - suitable for long-life industrial deployments |
| Write-Protect Scope | Hardware-enforced protection of upper 2 Kbytes (200h–3FFh) via dedicated WP pin |
| ESD Protection | >4 kV HBM - robust against handling and board-level ESD events |
Pinout & Package
24LC08BHT-E/ST is supplied in an 8-lead plastic TSSOP (4.4 mm body width) package, RoHS compliant and rated for −40°C to +125°C operation. Pin 1 is A0 (no internal connection), Pin 4 is VSS (ground), Pin 5 is SDA (open-drain bidirectional data line), Pin 6 is SCL (clock input), Pin 7 is WP (active-high write-protect control), and Pin 8 is VCC (power supply).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | No-connect (NC) | Not internally bonded; may be left floating or tied to VSS/VCC with no functional impact |
| VSS | Ground reference | Return path for all internal circuitry; must be low-impedance to ensure stable read/write margins |
| SDA | Serial data I/O | Open-drain bidirectional line requiring external pull-up (2 kΩ for 400 kHz); changes only during SCL low |
| SCL | Serial clock input | Master-generated clock synchronizing all address/data transfers; Schmitt-trigger input rejects noise |
| WP | Write-protect control | Active-high signal disabling writes to 200h–3FFh when pulled to VCC; no effect on reads |
| VCC | Power supply | 2.5V–5.5V supply; internal voltage detector disables writes if VCC drops below ~1.5V |
Key Features
| Feature | Design Value |
|---|---|
| Half-array hardware write-protect | Prevents accidental overwrites of critical calibration or security data stored in upper 2 Kbytes |
| 16-byte page write buffer | Enables single-burst programming of up to 16 contiguous bytes, minimizing I²C bus occupancy |
| Schmitt-trigger SCL/SDA inputs | Eliminates false Start/Stop detection on noisy PCBs or long traces without external filtering |
| Self-timed write cycle | Removes need for external delay timers or polling overhead beyond ACK polling |
| 1 μA max standby current | Supports ultra-low-power battery-backed applications such as smart sensors and metering endpoints |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing user-defined I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent settings across power cycles. Use Value: Hardware write-protect ensures factory-calibrated parameters remain intact during field firmware updates. | Use Scenario: Retaining door lock state, mirror position, and seat memory settings in automotive BCMs. IC Role / Device Role / Timing Role: Automotive-grade EEPROM providing secure, long-term data retention under extended temperature stress. Use Value: 125°C rating and 1M-cycle endurance guarantee reliable operation over 15+ year vehicle lifetimes. |
| Medical Infusion Pump Calibration Data | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Holding flow-rate calibration coefficients and safety limits that must survive battery replacement and sterilization cycles. IC Role / Device Role / Timing Role: Tamper-resistant memory storing mission-critical operational constants. Use Value: WP pin enables permanent locking of calibration region while allowing dynamic update of usage logs in unprotected lower block. | Use Scenario: Storing signed firmware patches and version metadata for secure over-the-air (OTA) updates in utility meters. IC Role / Device Role / Timing Role: Secure boot auxiliary storage verifying patch integrity before execution. Use Value: 400 kHz I²C speed enables fast patch loading; >200-year data retention meets regulatory archival 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-I/ST | Same 8 Kbit capacity and TSSOP-8 package, but rated only for −40°C to +85°C (industrial grade) | Lacks automotive temperature qualification; unsuitable for under-hood or engine-control modules | Select when cost sensitivity outweighs extended temperature requirement and AEC-Q100 compliance is not mandated |
| AT24C08D-SSHM-T | 8 Kbit I²C EEPROM from Microchip (formerly Atmel); identical 2.5–5.5V range, 400 kHz, and 16-byte page, but uses different WP implementation (software-configurable block protect) | Requires firmware-level WP enable/disable; lacks direct hardware WP pin for fail-safe protection | Choose when system-level flexibility in protecting arbitrary memory regions is preferred over hardware simplicity |
Compared with 24LC08BHT-E/ST, the 24LC08B-I/ST offers identical functionality at lower cost but excludes automotive qualification, while the AT24C08D-SSHM-T provides software-selectable protection granularity at the expense of deterministic hardware lockout - making 24LC08BHT-E/ST optimal for safety-critical, temperature-stressed applications requiring guaranteed write-disable behavior.
Availability
24LC08BHT-E/ST is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, medical devices, and smart metering applications requiring stable component supply, automotive-grade reliability, and long-term lifecycle support.
Supply support for 24LC08BHT-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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24LC08BHT-E/ST belongs to Microchip's 24LCxxH family of I²C serial EEPROMs, engineered specifically for robust, low-power, and temperature-resilient nonvolatile data storage in automotive and industrial control systems.
FAQ
What is the maximum I²C clock frequency supported by the 24LC08BHT-E/ST?
The 24LC08BHT-E/ST supports up to 400 kHz I²C clock frequency when VCC is ≥2.5V, meeting Fast-mode I²C specifications. At voltages below 2.5V, maximum clock rate drops to 100 kHz - however, 24LC08BHT-E/ST is specified only for 2.5V–5.5V operation, so 400 kHz is its guaranteed maximum. This enables faster configuration writes compared to standard-mode EEPROMs.
Does the 24LC08BHT-E/ST require external pull-up resistors on SDA and SCL lines?
Yes, the 24LC08BHT-E/ST requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. For 400 kHz operation, a 2 kΩ pull-up to VCC is recommended; for 100 kHz, 10 kΩ is typical. These resistors ensure proper logic high levels and meet rise-time requirements per I²C specification - omission causes communication failure.
How does the write-protect (WP) pin function on the 24LC08BHT-E/ST?
On the 24LC08BHT-E/ST, the WP pin is active-high: when tied to VCC, writes to memory addresses 200h–3FFh are disabled (upper 2 Kbytes protected), while reads remain fully functional. When tied to VSS or left floating, full-array write access is enabled. This hardware-level protection operates independently of I²C commands and cannot be overridden in software.
What is the page write capability of the 24LC08BHT-E/ST, and how does it affect memory addressing?
The 24LC08BHT-E/ST features a 16-byte page write buffer. During a page write, the device accepts up to 16 consecutive bytes starting from any address within a 16-byte-aligned physical page (e.g., 000h–00Fh, 010h–01Fh). If the write crosses a page boundary, data wraps to the start of the same page - not the next - requiring firmware to enforce alignment. This avoids unintended overwrites and ensures deterministic behavior.
Is the 24LC08BHT-E/ST qualified for automotive applications, and what does the "E" suffix indicate?
Yes, the "E" in 24LC08BHT-E/ST denotes Automotive temperature grade (−40°C to +125°C), and the device is designed and tested to meet automotive reliability requirements. While not explicitly AEC-Q100 certified in this datasheet, its extended temperature range, 1M-cycle endurance, and >200-year data retention align with automotive subsystem needs such as body electronics and infotainment backup storage.
24LC08BHT-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:
- 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:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC08BHT-E/ST FAQ
1.How can I place an order for 24LC08BHT-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC08BHT-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 24LC08BHT-E/ST reliable?
The price and inventory of 24LC08BHT-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 24LC08BHT-E/ST is usually 5 days.
3.What payment methods are accepted for 24LC08BHT-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC08BHT-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC08BHT-E/ST?
24LC08BHT-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC08BHT-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 24LC08BHT-E/ST?
For technical support, including 24LC08BHT-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC08BHT-E/ST requirements.
6.How does Aetrix verify that 24LC08BHT-E/ST is sourced from the original manufacturer or authorized distributors?
All 24LC08BHT-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 24LC08BHT-E/ST meets industry standards.
7.What is the process for return or replacement of 24LC08BHT-E/ST?
All 24LC08BHT-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC08BHT-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 24LC08BHT-E/ST part is unused and in its original packaging.
Return procedure for 24LC08BHT-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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