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Microchip Technology 24LC08BT-I/ST
- Part No.:
- 24LC08BT-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC08BT-I/ST.pdf
- Description:
- IC EEPROM 8KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,117
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Product details
Overview
24LC08BT-I/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, 1 µA standby current, and industrial temperature range (–40°C to +85°C). It features hardware write-protection via the WP pin and is packaged in an 8-lead SOIC (ST) for embedded system configuration storage.
For engineers reviewing the 24LC08BT-I/ST datasheet, 24LC08BT-I/ST pinout, 24LC08BT-I/ST application, or 24LC08BT-I/ST equivalent, this page delivers verified electrical specs, package mapping, I²C timing constraints, endurance data (1M cycles), and real-world use context for reliable BOM selection and firmware integration.
Technical Context
The 24LC08BT-I/ST implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal architecture includes a 16-byte page write buffer, self-timed erase/write cycle, and address pointer logic supporting current-address, random, and sequential read modes.
It uses a fixed 4-bit device identifier (1010) with 2-bit block select (B1/B0) and R/W bit for addressing four 256-word memory blocks. Write protection is controlled by the WP pin: tied to VSS enables full read/write access; tied to VCC disables all writes while preserving read functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8), organized as four independent 256-word blocks for modular configuration storage |
| VCC Range | 2.5V to 5.5V - ensures compatibility with 3.3V and 5V microcontroller I/O domains without level shifting |
| Max Clock Frequency | 400 kHz - supports standard-mode I²C timing; not rated for fast-mode (1 MHz) operation |
| Page Write Buffer | 16 bytes - enables efficient burst writes within a single physical page boundary (0–15, 16–31, etc.) |
| Write Cycle Time | 5 ms maximum - defines minimum inter-write interval; requires ACK polling or timeout handling in firmware |
| Endurance | 1,000,000 erase/write cycles - guarantees long-term reliability for frequently updated calibration or state data |
| Data Retention | 200 years - ensures nonvolatile storage integrity across product lifecycle without refresh |
| Temperature Range | Industrial: –40°C to +85°C - qualified for deployment in automotive ECUs, industrial controllers, and outdoor equipment |
Pinout & Package
8-Lead SOIC (ST) package: 3.90 mm body width, 1.27 mm pitch, gull-wing leads. Exposed pad not present. RoHS-compliant matte tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A0) | No-connect | Internally unconnected; may be left floating or tied to VSS/VCC with no functional impact |
| 2 (A1) | No-connect | Internally unconnected; no effect on addressing or operation |
| 3 (A2) | No-connect | Internally unconnected; eliminates need for external pull-up/down resistors |
| 4 (VSS) | Ground reference | Primary return path for I²C bus and internal circuitry; must be low-impedance connection |
| 5 (SDA) | Serial data I/O | Open-drain bidirectional line requiring external pull-up resistor (2 kΩ typical for 400 kHz) |
| 6 (SCL) | Serial clock input | Master-generated clock; Schmitt-trigger input rejects noise up to 50 ns spikes |
| 7 (WP) | Hardware write-protect control | Active-high enable: tie to VCC to lock entire memory array (000–3FF); tie to VSS for full read/write access |
| 8 (VCC) | Power supply | Must be decoupled with 0.1 µF ceramic capacitor near pin; tolerates 2.5–5.5V with stable regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low-power standby | 1 µA max at I-temp - extends battery life in always-on sensor nodes and portable devices |
| I²C compatibility | Fully compliant with Philips I²C-bus specification, including Start/Stop generation, ACK/NACK, and arbitration |
| Page write capability | 16-byte buffer reduces host CPU overhead vs. byte-by-byte writes; improves firmware efficiency |
| Noise-immune interface | Schmitt-trigger inputs + 50 ns spike suppression ensure robust operation on electrically noisy PCBs |
| Hardware write protection | Single-pin (WP) global lock prevents accidental firmware corruption during power-up or reset sequences |
| Extended endurance | 1 million cycles enables daily reconfiguration over 27+ years - suitable for field-upgradable systems |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Storing calibrated sensor offsets, user-defined I/O mappings, and firmware revision flags in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed via I²C during boot and runtime parameter updates. Use Value: Enables field-reprogrammability without hardware changes; WP pin prevents corruption during brown-out events. |
Use Scenario: Holding door lock settings, mirror position presets, and lighting profiles in automotive BCMs. IC Role / Device Role / Timing Role: Persistent memory client on vehicle's low-speed I²C bus, synchronized to MCU clock. Use Value: Industrial temp rating ensures reliability across under-hood thermal cycling; 1M-cycle endurance supports lifetime updates. |
| Medical Infusion Pump Calibration Data | Smart Energy Meter Firmware Parameters |
|
Use Scenario: Securing flow-rate calibration coefficients, safety thresholds, and usage logs in Class II medical devices. IC Role / Device Role / Timing Role: Tamper-resistant data vault with hardware write-lock activated during critical delivery phases. Use Value: WP pin provides deterministic protection against unintended writes during motor actuation or alarm conditions. |
Use Scenario: Storing tariff schedules, meter ID, phase calibration values, and tamper-event counters in ANSI C12.22-compliant meters. IC Role / Device Role / Timing Role: Secure, low-power memory node on isolated I²C segment with ESD-hardened SDA/SCL pins. Use Value: 4 kV ESD rating protects against handling damage; 200-year retention meets utility-grade 20+ year deployment mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA08T-I/ST | Wider VCC range (1.7–5.5V); lower 100 kHz max clock below 2.5V; same 8Kbit organization and SOIC-8 package | Preferred for battery-powered systems operating down to 1.8V; unsuitable where 400 kHz timing is required at <2.5V | Select when ultra-low-voltage operation is mandatory and clock speed can be reduced accordingly |
| 24FC08T-I/ST | Supports 1 MHz I²C; VCC range 1.7–5.5V; identical pinout and memory map but faster AC characteristics | Required for high-throughput logging or real-time parameter updates where 400 kHz is insufficient | Choose only if system design mandates fast-mode I²C and voltage margin allows ≥1.7V operation |
Compared with 24LC08BT-I/ST, the 24AA08T-I/ST offers broader supply flexibility at lower speed, while the 24FC08T-I/ST delivers higher bandwidth at the cost of tighter voltage compliance - neither is pin-compatible drop-in replacements due to differing VCC and timing specifications.
Availability
24LC08BT-I/ST is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device applications requiring stable component supply, long-term obsolescence management, and RoHS-compliant sourcing.
Supply support for 24LC08BT-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 microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.
The 24LC08B family was designed specifically for cost-sensitive, space-constrained embedded systems needing reliable, low-power nonvolatile storage with simple I²C integration and industrial-grade environmental resilience.
FAQ
What is the maximum I²C clock frequency supported by the 24LC08BT-I/ST?
The 24LC08BT-I/ST supports a maximum clock frequency of 400 kHz across its specified VCC range of 2.5V to 5.5V. It is not rated for fast-mode (1 MHz) operation like the 24FC08 variant. This 400 kHz limit ensures timing compliance with standard-mode I²C specifications and maintains signal integrity on typical PCB traces without requiring specialized layout techniques.
Does the 24LC08BT-I/ST require external pull-up resistors on SDA and SCL lines?
Yes, the 24LC08BT-I/ST requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. For 400 kHz operation, a 2 kΩ pull-up to VCC is recommended. The value must be selected based on bus capacitance and rise-time requirements per I²C specification to avoid timing violations during high-speed transfers.
How does the WP pin function on the 24LC08BT-I/ST?
The WP (Write-Protect) pin on the 24LC08BT-I/ST is an active-high hardware lock. When tied to VCC, it disables all write operations to the entire 8-Kbit memory array (addresses 000–3FF), while read operations remain fully functional. When tied to VSS or left floating, full read/write access is enabled. This feature prevents accidental overwrites during power transitions or firmware errors.
What is the page write buffer size of the 24LC08BT-I/ST, and how does it affect memory writes?
The 24LC08BT-I/ST has a 16-byte page write buffer. This allows up to 16 bytes to be written in a single I²C transaction, reducing protocol overhead versus byte-by-byte writes. However, page boundaries are fixed at 16-byte intervals (e.g., 0–15, 16–31), and crossing a boundary causes wraparound - so software must align writes to avoid unintended data overwrite within the same page.
Is the 24LC08BT-I/ST qualified for automotive applications?
The 24LC08BT-I/ST is rated for industrial temperature (–40°C to +85°C) and is RoHS-compliant, but it is not AEC-Q100 qualified. While it may be used in non-safety-critical automotive subsystems (e.g., infotainment or lighting controls), Microchip's AEC-Q100-qualified variants - such as the 24LC08B-IP/SN - are required for engine bay or safety-related modules where formal automotive qualification is mandated.
24LC08BT-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:
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC08BT-I/ST FAQ
1.How can I place an order for 24LC08BT-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC08BT-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 24LC08BT-I/ST reliable?
The price and inventory of 24LC08BT-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 24LC08BT-I/ST is usually 5 days.
3.What payment methods are accepted for 24LC08BT-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC08BT-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC08BT-I/ST?
24LC08BT-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC08BT-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 24LC08BT-I/ST?
For technical support, including 24LC08BT-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC08BT-I/ST requirements.
6.How does Aetrix verify that 24LC08BT-I/ST is sourced from the original manufacturer or authorized distributors?
All 24LC08BT-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 24LC08BT-I/ST meets industry standards.
7.What is the process for return or replacement of 24LC08BT-I/ST?
All 24LC08BT-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC08BT-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 24LC08BT-I/ST part is unused and in its original packaging.
Return procedure for 24LC08BT-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC08BT-I/ST Tags
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