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Microchip Technology 24LC08BH-E/ST
- Part No.:
- 24LC08BH-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC08BH-E/ST.pdf
- Description:
- IC EEPROM 8KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,165
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Product details
Overview
24LC08BH-E/ST 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, 16-byte page write buffer, and hardware write-protect for memory addresses 200h–3FFh. It supports industrial and automotive temperature ranges and is used in firmware storage, calibration data retention, and configuration parameter backup in embedded control systems.
For engineers reviewing the 24LC08BH-E/ST datasheet, 24LC08BH-E/ST pinout, 24LC08BH-E/ST application, or 24LC08BH-E/ST equivalent, key selection criteria include VCC minimum (2.5V), half-array write-protection via WP pin, 1 μA standby current, and compatibility with standard I²C bus timing at 400 kHz under automotive-grade thermal conditions.
Technical Context
The 24LC08BH-E/ST implements a slave-only I²C interface with fixed 4-bit device identifier '1010', block-select addressing (B2–B0) for selecting one of four 256-word memory blocks, and Schmitt-triggered SDA/SCL inputs for noise immunity. Its internal address pointer auto-increments during sequential reads and page writes, enabling efficient burst access within 16-byte boundaries.
Write protection is implemented via dedicated WP pin: tied to VCC, it disables writes to upper half (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 supports acknowledge polling to detect write completion without fixed delay timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8), organized as four independent 256-word blocks for modular data partitioning |
| VCC Range | 2.5V to 5.5V - mandates minimum 2.5V supply; not operable below this threshold |
| Max Clock Frequency | 400 kHz - supports high-speed I²C mode; drops to 100 kHz only if VCC < 2.5V (not applicable here) |
| Page Write Buffer | 16 bytes - enables efficient multi-byte writes within single physical page boundary (000h–00Fh, 010h–01Fh, etc.) |
| Write Protection | Hardware-enabled half-array (200h–3FFh) via WP pin - prevents accidental overwrites of critical configuration data |
| Endurance & Retention | 1 million erase/write cycles and >200 years data retention - validated for long-life industrial deployments |
| Temperature Range | -40°C to +125°C (Automotive E-grade) - qualified for under-hood and powertrain control applications |
Pinout & Package
24LC08BH-E/ST is supplied in an 8-lead TSSOP package (4.4 mm body width), RoHS-compliant, with lead finish specified per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address Input | No internal connection; may be left floating or tied to VSS/VCC without effect on operation |
| A1 | Address Input | No internal connection; unused in 24XX08H family; no impact on device addressing |
| A2 | Address Input | No internal connection; all three address pins (A0–A2) are unconnected per datasheet |
| VSS | Ground | Reference return path for all internal circuitry and I/O signals |
| SDA | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up; carries address, data, and ACK/NACK |
| SCL | Serial Clock Input | Master-generated clock synchronizing all data transfers; Schmitt-triggered for noise rejection |
| WP | Write-Protect Control | Active-high enable for half-array protection; logic high = write inhibit for 200h–3FFh |
| VCC | Power Supply | Primary DC supply input (2.5V–5.5V); powers EEPROM core, interface logic, and charge pump |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 2.5V VCC - enables direct integration with 3.3V and 5V microcontroller I²C buses without level shifting |
| Page Write Capability | 16-byte buffer allows atomic multi-byte updates - reduces bus occupancy and improves firmware update reliability |
| Schmitt Trigger Inputs | On SDA and SCL pins with 0.05 VCC hysteresis - rejects fast transients and ensures robust communication in electrically noisy environments |
| Hardware Write-Protection | WP pin directly controls write-enable state for upper 2 Kbit - eliminates need for software lock bits or command sequences |
| Automotive Temperature Grade | Qualified from -40°C to +125°C - meets AEC-Q100 stress test requirements for automotive electronics |
Applications
| Industrial Sensor Calibration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and linearization tables in programmable logic controllers and industrial transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent calibration data accessed at system boot and updated during field recalibration. Use Value: Enables traceable, field-updatable calibration without requiring reprogramming of main MCU flash; WP pin prevents corruption during brown-out events. | Use Scenario: Retaining seat position memory, mirror angle settings, and lighting configuration across ignition cycles in automotive BCMs. IC Role / Device Role / Timing Role: Dedicated parameter storage peripheral interfaced via I²C to BCM microcontroller; accessed during wake-up and sleep transitions. Use Value: Supports AEC-Q100-compliant data retention over 15+ years; 125°C rating ensures reliability near engine bay heat sources. |
| Medical Device Configuration Backup | Smart Energy Meter Firmware Metadata |
Use Scenario: Preserving user-defined alarm thresholds, measurement units, and audit log pointers in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, low-power nonvolatile memory for safety-critical configuration parameters that must survive battery removal. Use Value: 1 μA standby current extends battery life; >200-year data retention satisfies IEC 62304 long-term archival requirements. | Use Scenario: Storing firmware version stamps, secure boot keys, and tariff schedule timestamps in ANSI C12.20-certified electricity meters. IC Role / Device Role / Timing Role: Tamper-resistant metadata repository accessed during meter boot and firmware upgrade verification. Use Value: Hardware WP pin prevents unauthorized modification of cryptographic keys; 1M endurance supports daily firmware patch logging for 27 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA08H-I/ST | Lower VCC min (1.7V), same 8 Kbit capacity and pinout, but rated only for -40°C to +85°C | Not qualified for automotive under-hood use; suitable for cost-sensitive industrial designs with 1.8V/3.3V supplies | Select when operating voltage may dip below 2.5V and automotive temperature grade is unnecessary |
| AT24C08D-SSHM-T | Same 8 Kbit size, 2.5V–5.5V range, and TSSOP-8 package; supports 1 MHz I²C (vs. 400 kHz), but lacks hardware WP pin | Requires software-based write protection; higher speed useful in high-throughput data loggers | Choose when faster I²C throughput is prioritized and WP functionality can be managed in firmware |
Compared with 24LC08BH-E/ST, the 24AA08H-I/ST offers wider voltage flexibility but sacrifices automotive qualification, while the AT24C08D-SSHM-T delivers higher clock speed at the cost of hardware write-protection - making 24LC08BH-E/ST the optimal choice where guaranteed half-array protection and extended temperature resilience are mandatory.
Availability
24LC08BH-E/ST is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor calibration systems, medical device configuration backup, and smart energy meter firmware metadata storage requiring stable component supply across extended temperature and long product lifecycles.
Supply support for 24LC08BH-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 components, 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 reliable, low-power, I²C-based nonvolatile data storage in automotive, industrial, and medical applications demanding extended temperature operation and hardware-level data integrity safeguards.
FAQ
What is the minimum supply voltage required for reliable operation of the 24LC08BH-E/ST?
The 24LC08BH-E/ST 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 specified to operate below 2.5V - attempting to power the 24LC08BH-E/ST at 1.8V will result in undefined behavior or functional failure. This 2.5V threshold is explicitly defined in the Device Selection Table and Electrical Characteristics section of the DS20002084B datasheet.
Does the 24LC08BH-E/ST support true 400 kHz I²C communication across its entire temperature and voltage range?
Yes, the 24LC08BH-E/ST supports 400 kHz I²C clock frequency across its full rated VCC range (2.5V–5.5V) and full automotive temperature range (-40°C to +125°C). The datasheet confirms this in the Device Selection Table and AC Characteristics (Table 1-2), where FCLK Max = 400 kHz is specified for VCC ≥ 2.5V - no derating is required for temperature or voltage within spec limits. This distinguishes it from the 24AA08H, which drops to 100 kHz below 2.5V.
How does the hardware write-protection feature work on the 24LC08BH-E/ST?
The 24LC08BH-E/ST implements hardware write-protection via the WP pin: when tied to VCC, writes to memory addresses 200h–3FFh (upper 2 Kbit) are inhibited, while reads remain fully functional; when tied to VSS, full array read/write access is enabled. This protection is active during all write cycles - including byte and page writes - and requires no command sequence or software overhead. The WP pin state is sampled at the start of each write operation.
Can the 24LC08BH-E/ST be used in place of the 24LC08B-I/ST in an existing design?
Yes, the 24LC08BH-E/ST is pin-compatible and functionally identical to the 24LC08B-I/ST in all electrical and timing characteristics, with the exception of temperature rating: the -E suffix denotes automotive qualification (-40°C to +125°C) versus industrial (-40°C to +85°C). No PCB or firmware changes are needed for substitution, and the enhanced temperature range provides additional margin for thermally demanding applications such as automotive or industrial edge nodes.
What is the maximum number of bytes that can be written in a single page write operation on the 24LC08BH-E/ST?
The 24LC08BH-E/ST supports a maximum of 16 bytes per page write operation, aligned to physical page boundaries (e.g., 000h–00Fh, 010h–01Fh). Attempting to write across a 16-byte boundary causes wraparound within the current page rather than crossing into the next - so writing 17 bytes starting at 00Fh stores bytes 1–16 at 00Fh–000h, overwriting the first byte. This behavior is documented in Figure 4-2 and Section 4.2 of the DS20002084B datasheet.
24LC08BH-E/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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-TSSOP
24LC08BH-E/ST FAQ
1.How can I place an order for 24LC08BH-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC08BH-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 24LC08BH-E/ST reliable?
The price and inventory of 24LC08BH-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 24LC08BH-E/ST is usually 5 days.
3.What payment methods are accepted for 24LC08BH-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC08BH-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC08BH-E/ST?
24LC08BH-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC08BH-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 24LC08BH-E/ST?
For technical support, including 24LC08BH-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC08BH-E/ST requirements.
6.How does Aetrix verify that 24LC08BH-E/ST is sourced from the original manufacturer or authorized distributors?
All 24LC08BH-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 24LC08BH-E/ST meets industry standards.
7.What is the process for return or replacement of 24LC08BH-E/ST?
All 24LC08BH-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC08BH-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 24LC08BH-E/ST part is unused and in its original packaging.
Return procedure for 24LC08BH-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC08BH-E/ST Tags
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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