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Microchip Technology 24LC08BH-E/SN
- Part No.:
- 24LC08BH-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24LC08BH-E/SN.pdf
- Description:
- IC EEPROM 8KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,562
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Product details
Overview
24LC08BH-E/SN from Microchip Technology is an 8 Kbit I²C-compatible serial EEPROM organized as four 256 × 8-bit blocks, operating from 2.5V to 5.5V with automotive-grade temperature range (–40°C to +125°C), 400 kHz max clock frequency, and hardware write-protect for memory addresses 200h–3FFh. It is used in vehicle control modules for storing calibration data, fault logs, and configuration parameters.
For engineers reviewing the 24LC08BH-E/SN datasheet, 24LC08BH-E/SN pinout, 24LC08BH-E/SN application, or 24LC08BH-E/SN equivalent, key selection criteria include automotive temperature compliance, half-array write-protection, 16-byte page write buffer, and I²C timing compatibility at 2.5V minimum supply.
Technical Context
The 24LC08BH-E/SN implements a slave-only I²C interface with fixed 7-bit device address prefix '1010', block-select addressing (B1,B0), and R/W bit control. Its internal address pointer auto-increments during sequential reads and page writes, enabling efficient bulk access within 16-byte boundaries.
It features Schmitt-trigger inputs on SDA/SCL with 50 ns spike suppression, output slope control to limit ground bounce, and a VCC threshold detector disabling write logic below 1.5V. Write protection is activated by tying WP to VCC, locking addresses 200h–3FFh while permitting full read access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8), organized as four 256-word blocks for segmented firmware or parameter storage |
| Supply voltage | 2.5V to 5.5V - supports direct connection to 3.3V or 5V automotive power rails without level shifting |
| Max clock frequency | 400 kHz - enables fast configuration loading in engine control units and ADAS sensors |
| Page write buffer | 16 bytes - reduces I²C transaction count when updating multi-byte calibration tables |
| Endurance | 1 million erase/write cycles - ensures reliable logging over 15+ years of vehicle service life |
| Data retention | 200 years at +25°C - guarantees nonvolatile storage integrity across product lifecycle without refresh |
| Temperature grade | Automotive (E): –40°C to +125°C - qualified for under-hood and transmission control module environments |
Pinout & Package
24LC08BH-E/SN is supplied in an 8-lead plastic SOIC (3.90 mm body) package per Microchip's standard SN designation. All pins are surface-mount compatible with JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | Not connected | No internal bond; may be left floating or tied to VSS/VCC with no functional impact |
| VSS | Ground reference | Primary return path for all I/O and core logic; must be low-impedance in automotive PCB layout |
| SDA | Serial data I/O | Open-drain bidirectional bus line requiring external pull-up (2 kΩ typical for 400 kHz) |
| SCL | Serial clock input | Master-generated synchronous timing signal; Schmitt-triggered for noise immunity |
| WP | Write-protect control | Logic-high (VCC) enables half-array protection (200h–3FFh); logic-low (VSS) disables protection |
| VCC | Power supply | Accepts 2.5–5.5V; internal regulator ensures stable EEPROM operation across battery voltage variation |
Key Features
| Feature | Design Value |
|---|---|
| Automotive temperature qualification | Rated for –40°C to +125°C ambient operation - validated for engine control, transmission, and body electronics |
| Hardware write-protect | WP pin enables permanent lock of upper 2 Kbytes (200h–3FFh) - prevents accidental overwrite of critical calibration data |
| 16-byte page write buffer | Reduces I²C bus overhead by up to 87% vs. byte-write for 16-byte updates - improves boot-time configuration loading speed |
| Schmitt-trigger inputs with 50 ns filtering | Rejects EMI-induced glitches on SDA/SCL in noisy automotive harnesses - eliminates spurious Start/Stop detection |
| Self-timed write cycle | 5 ms maximum duration with automatic completion detection via ACK polling - simplifies host firmware timing logic |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Storing real-time sensor calibration offsets and fault history logs across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed write integrity during battery transients. Use Value: Enables zero-latency reinitialization after cold start using last-known-good calibration values. |
Use Scenario: Retaining camera lens focus profiles and radar beam alignment coefficients across power-down events. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration storage with hardware write-lock for safety-critical settings. Use Value: Prevents field-update corruption of ADAS calibration data during firmware upgrades or brownout conditions. |
| Body Control Module (BCM) | Transmission Control Module (TCM) |
Use Scenario: Maintaining user preferences (mirror position, seat memory, lighting schemes) across vehicle power cycles. IC Role / Device Role / Timing Role: Low-power I²C slave supporting infrequent writes and frequent reads in always-on domains. Use Value: Achieves <1 µA standby current - extends battery life in parked vehicle monitoring modes. |
Use Scenario: Logging gear shift timing maps and torque converter clutch engagement histories for predictive maintenance. IC Role / Device Role / Timing Role: High-endurance data logger with 1M-cycle rating for mission-critical drivetrain telemetry. Use Value: Supports >10 years of daily shift logging without wear-out - eliminates field replacement due to EEPROM fatigue. |
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/SN | Industrial temperature grade (–40°C to +85°C); identical electrical specs and pinout | Not qualified for under-hood or transmission environments requiring +125°C operation | Select only for cabin-mounted modules where ambient temperature remains ≤+85°C |
| AT24C08D-SSHM-T | Same 8 Kbit capacity, 1.7–5.5V supply, but rated only to +85°C; different I²C timing margins | Lacks automotive qualification and half-array write-protect; requires external software lock implementation | Use only in cost-sensitive industrial designs where AEC-Q100 compliance is not required |
Compared with 24LC08BH-E/SN, the 24LC08B-I/SN omits automotive temperature validation but matches all electrical behavior, while AT24C08D-SSHM-T trades qualification for broader voltage range and lacks hardware-based write protection - making both unsuitable as drop-in replacements in safety-critical automotive systems.
Availability
24LC08BH-E/SN is available at Aetrix Electronics and suitable for engine control units, ADAS sensors, body control modules, and transmission control systems requiring stable component supply across extended automotive lifecycles.
Supply support for 24LC08BH-E/SN 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, with global manufacturing and quality systems certified to ISO/TS 16949 for automotive components.
The 24LC08BH belongs to Microchip's automotive-qualified serial EEPROM product line, designed specifically for robust, long-life nonvolatile storage in harsh-temperature vehicle subsystems.
FAQ
What is the minimum operating voltage for the 24LC08BH-E/SN?
The 24LC08BH-E/SN requires a minimum supply voltage of 2.5V, as specified in its device selection table and electrical characteristics. This distinguishes it from the 24AA08H variant, which operates down to 1.7V. Operation below 2.5V is not guaranteed and may result in failed write cycles or data corruption. The 24LC08BH-E/SN's VCC threshold detector disables internal programming logic if voltage drops below 1.5V, preventing partial writes.
Does the 24LC08BH-E/SN support I²C clock stretching?
No, the 24LC08BH-E/SN does not support I²C clock stretching. As a slave-only device with self-timed internal write cycles, it responds to master-initiated transactions but cannot hold SCL low to delay communication. During active write cycles, it simply stops acknowledging - requiring the host to use ACK polling to detect completion. This design avoids bus contention but places timing responsibility entirely on the master controller.
How is write protection implemented on the 24LC08BH-E/SN?
Write protection on the 24LC08BH-E/SN is implemented via the WP pin: when tied to VCC, memory addresses 200h–3FFh (upper 2 Kbytes) are locked against write operations, while full read access remains enabled. Addresses 000h–1FFh remain writable. If WP is tied to VSS or left floating, write protection is disabled across the entire array. This hardware-level lock requires no firmware intervention and persists through power cycles.
What package type does the 24LC08BH-E/SN use?
The 24LC08BH-E/SN uses an 8-lead plastic SOIC package with 3.90 mm body width, designated by the 'SN' suffix in its part number. It conforms to JEDEC MS-012AC outline dimensions and is RoHS compliant. Pin 1 is marked with a notch or dot, and the package supports standard reflow soldering profiles for automotive-grade assembly.
Can the 24LC08BH-E/SN be used in place of the 24LC08B-I/SN?
The 24LC08BH-E/SN is pin-compatible and electrically identical to the 24LC08B-I/SN except for temperature qualification: the 'E' grade is rated for –40°C to +125°C, while the 'I' grade is limited to –40°C to +85°C. Substituting the 24LC08BH-E/SN into an industrial design is safe and provides margin, but using the 'I' version in automotive applications violates thermal specifications and voids AEC-Q100 compliance. No PCB or firmware changes are needed for the upgrade.
24LC08BH-E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24LC08BH-E/SN FAQ
1.How can I place an order for 24LC08BH-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC08BH-E/SN 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/SN reliable?
The price and inventory of 24LC08BH-E/SN 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/SN is usually 5 days.
3.What payment methods are accepted for 24LC08BH-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC08BH-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC08BH-E/SN?
24LC08BH-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC08BH-E/SN 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/SN?
For technical support, including 24LC08BH-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC08BH-E/SN requirements.
6.How does Aetrix verify that 24LC08BH-E/SN is sourced from the original manufacturer or authorized distributors?
All 24LC08BH-E/SN 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/SN meets industry standards.
7.What is the process for return or replacement of 24LC08BH-E/SN?
All 24LC08BH-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24LC08BH-E/SN, 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/SN part is unused and in its original packaging.
Return procedure for 24LC08BH-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC08BH-E/SN Tags
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