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Microchip Technology 24LC08BH-E/P
- Part No.:
- 24LC08BH-E/P
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
24LC08BH-E/P.pdf
- Description:
- IC EEPROM 8KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,446
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Product details
Overview
24LC08BH-E/P from Microchip Technology Inc. is an 8 Kbit I²C-compatible serial EEPROM organized as four 256 × 8-bit blocks, operating from 2.5V to 5.5V with 400 kHz max clock frequency, 3 ms typical page write time, and hardware write-protect for memory addresses 200h–3FFh. It serves as nonvolatile configuration storage in industrial control modules requiring reliable data retention over 200 years.
For engineers reviewing the 24LC08BH-E/P datasheet, 24LC08BH-E/P pinout, 24LC08BH-E/P application, or 24LC08BH-E/P equivalent, key selection criteria include VCC min (2.5V), automotive temperature range (−40°C to +125°C), half-array write-protection via WP pin, 16-byte page buffer, and PDIP-8 packaging with RoHS compliance.
Technical Context
The 24LC08BH-E/P implements a slave-only I²C interface with fixed 7-bit address prefix '1010', block-select addressing (B2–B0), and Schmitt-triggered SDA/SCL inputs for noise immunity. Its internal address pointer supports current-address, random, and sequential read modes, while ACK polling enables precise write-cycle completion detection without timeout delays.
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 no external timing components required, and includes VCC threshold detection to inhibit writes below 1.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8), organized as four 256-word blocks for modular firmware/config partitioning |
| VCC operating range | 2.5V to 5.5V - ensures compatibility with 3.3V and 5V logic systems; excludes 1.7V operation of 24AA08H variant |
| Max clock frequency | 400 kHz - enables high-throughput configuration updates; drops to 100 kHz only if VCC < 2.5V (not applicable here) |
| Page write buffer | 16 bytes - allows burst programming of up to 16 contiguous bytes per STOP-initiated cycle, reducing bus overhead |
| Write endurance | 1 million cycles - supports frequent recalibration or logging in industrial monitoring applications |
| Data retention | >200 years at +85°C - guarantees long-term integrity of calibration constants and security keys |
| Temperature grade | Automotive (E): −40°C to +125°C - qualified for under-hood and powertrain control units |
Pinout & Package
24LC08BH-E/P is supplied in an 8-lead plastic DIP (300 mil) package with through-hole mounting. 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 (write-protect control), and Pin 8 is VCC (2.5–5.5V supply). A0, A1, and A2 are unconnected and may be left floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Not connected | No internal bond; electrically isolated - may float or tie to VSS/VCC without functional impact |
| A1 | Not connected | No internal bond; electrically isolated - does not affect device addressing or operation |
| A2 | Not connected | No internal bond; eliminates need for external pull-up/down resistors on address pins |
| VSS | Ground reference | Return path for all internal circuitry; must be low-impedance to ensure stable I²C signaling |
| SDA | Bidirectional data line | Open-drain I²C bus line requiring external pull-up (2 kΩ for 400 kHz); carries address, data, and ACK signals |
| SCL | Serial clock input | Master-generated clock synchronizing all transfers; Schmitt-triggered for noise rejection on noisy PCBs |
| WP | Hardware write-protect enable | Active-high signal: VCC = protect 200h–3FFh; VSS = full-array write access - critical for secure boot parameter locking |
| VCC | Power supply | 2.5–5.5V DC input; internal VCC detector prevents writes during brown-out conditions below ~1.5V |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | 0.05 VCC hysteresis on SDA/SCL - suppresses EMI-induced glitches in motor drive or power supply environments |
| Output slope control | Controlled SDA edge rates - eliminates ground bounce during fast transitions, improving signal integrity on dense boards |
| Page write capability | 16-byte buffer with automatic address increment - reduces I²C transaction count by up to 94% vs. byte-write for config blocks |
| Half-array hardware write-protect | WP pin directly gates write access to 200h–3FFh - enables immutable factory calibration storage independent of user firmware |
| ESD protection | >4,000V HBM - withstands handling and board-level ESD events without latch-up or parametric shift |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and calibration offsets in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration register providing persistent state across power cycles; accessed via I²C during boot and runtime reconfiguration. Use Value: Enables field-upgradable control logic without requiring flash reprogramming; 200-year retention ensures lifetime validity of calibration data. |
Use Scenario: Holding seat position memory, mirror angle presets, and lighting profiles in automotive BCMs operating at 125°C ambient. IC Role / Device Role / Timing Role: Automotive-grade EEPROM storing user preferences with guaranteed operation across extended temperature range. Use Value: WP pin locks factory-set safety-critical parameters (e.g., airbag thresholds) while allowing user customization of non-safety features. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Parameters |
Use Scenario: Retaining flow-rate calibration coefficients, dose limits, and error log history in Class II medical devices requiring regulatory traceability. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for FDA/IEC 62304-compliant configuration data; accessed only during maintenance mode. Use Value: Hardware write-protect (WP=VCC) prevents accidental overwrite of calibrated values during routine servicing. |
Use Scenario: Storing tariff schedules, metering constants, and communication credentials in ANSI C12.22-compliant smart meters exposed to outdoor thermal cycling. IC Role / Device Role / Timing Role: High-reliability data vault supporting 1M+ write cycles for daily billing data snapshots and firmware updates. Use Value: 400 kHz I²C interface enables rapid credential refresh during OTA updates; 125°C rating ensures operation inside sealed meter enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC08BHT-I/P | Same die, industrial temp (−40°C to +85°C), identical electrical specs and pinout | Lacks automotive qualification; unsuitable for under-hood or powertrain use cases requiring 125°C operation | Select when cost-sensitive industrial designs do not require extended temperature validation |
| AT24C08D-SSHM-T | 8 Kbit I²C EEPROM, 1.7–5.5V VCC, 1 MHz max clock, 5 ms write cycle, SOIC-8 package | Higher speed but longer write time; no hardware write-protect pin - requires software lock or external logic for protected regions | Choose for faster read throughput where WP functionality is managed externally or unnecessary |
Compared with 24LC08BH-E/P, the 24LC08BHT-I/P offers identical functionality at lower cost for non-automotive use, while the AT24C08D lacks integrated half-array protection - making the 24LC08BH-E/P uniquely suited for safety-critical parameter locking in automotive and medical systems.
Availability
24LC08BH-E/P is available at Aetrix Electronics and suitable for industrial PLC configuration storage, automotive body control modules, medical infusion pump calibration, and smart energy meter firmware parameters requiring stable component supply across extended temperature and long product lifecycles.
Supply support for 24LC08BH-E/P 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 24LC08BH belongs to Microchip's serial EEPROM product line, designed specifically for robust, low-power, I²C-based nonvolatile data storage in automotive, industrial, and medical applications demanding extended temperature operation and hardware-level write protection.
FAQ
What is the minimum VCC voltage required for reliable operation of the 24LC08BH-E/P?
The 24LC08BH-E/P requires a minimum VCC of 2.5V for guaranteed operation across its full temperature range (−40°C to +125°C). Unlike the 24AA08H variant, it is not rated for 1.7V operation. Below 2.5V, the device may fail to acknowledge I²C commands or complete write cycles reliably. Always maintain VCC ≥2.5V in designs using 24LC08BH-E/P.
How does the WP pin function on the 24LC08BH-E/P, and what memory region does it protect?
The WP pin on the 24LC08BH-E/P is a hardware write-protect enable: when tied to VCC, it disables write access to memory addresses 200h–3FFh (the upper 2 Kbytes), while reads remain fully functional. When tied to VSS, full-array write access is enabled. This feature allows separation of factory-calibrated data (protected) from user-configurable parameters (unprotected) - a key capability of the 24LC08BH-E/P.
Can the 24LC08BH-E/P be used in place of the 24AA08H in an existing design?
No - the 24LC08BH-E/P is not a drop-in replacement for the 24AA08H due to its higher minimum VCC (2.5V vs. 1.7V) and absence of 1.7V operation. If the host system operates below 2.5V, the 24LC08BH-E/P will not function correctly. Additionally, the 24LC08BH-E/P is qualified for automotive temperature range, whereas the 24AA08H is limited to industrial grade - verify thermal requirements before substitution. Always validate with 24LC08BH-E/P.
What is the maximum supported I²C clock frequency for the 24LC08BH-E/P, and under what conditions?
The 24LC08BH-E/P supports a maximum I²C clock frequency of 400 kHz when VCC is between 2.5V and 5.5V - covering all standard automotive and industrial supply rails. It does not support 1 MHz operation. The 100 kHz limit applies only to the 24AA08H variant at VCC <2.5V; this restriction does not apply to the 24LC08BH-E/P. Ensure pull-up resistors are sized appropriately (e.g., 2 kΩ) for 400 kHz signaling on the 24LC08BH-E/P.
Does the 24LC08BH-E/P support page write operations, and what is the buffer size?
Yes, the 24LC08BH-E/P supports page write operations with a 16-byte page buffer. Up to 16 contiguous bytes can be loaded into the buffer and written to memory with a single STOP condition. Page boundaries align every 16 bytes (e.g., 000h–00Fh, 010h–01Fh), and crossing a boundary causes wraparound within the same page - a behavior explicitly defined in the 24LC08BH-E/P datasheet and requiring firmware awareness.
24LC08BH-E/P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
24LC08BH-E/P FAQ
1.How can I place an order for 24LC08BH-E/P through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC08BH-E/P 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 24LC08BH-E/P reliable?
The price and inventory of 24LC08BH-E/P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC08BH-E/P is usually 5 days.
3.What payment methods are accepted for 24LC08BH-E/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC08BH-E/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC08BH-E/P?
24LC08BH-E/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC08BH-E/P 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 24LC08BH-E/P?
For technical support, including 24LC08BH-E/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC08BH-E/P requirements.
6.How does Aetrix verify that 24LC08BH-E/P is sourced from the original manufacturer or authorized distributors?
All 24LC08BH-E/P 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 24LC08BH-E/P meets industry standards.
7.What is the process for return or replacement of 24LC08BH-E/P?
All 24LC08BH-E/P units undergo pre-shipment inspection (PSI). If there is an issue with 24LC08BH-E/P, 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 24LC08BH-E/P part is unused and in its original packaging.
Return procedure for 24LC08BH-E/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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