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Microchip Technology 24LC08BT/ST
- Part No.:
- 24LC08BT/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC08BT/ST.pdf
- Description:
- IC EEPROM 8KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,751
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Product details
Overview
24LC08BT/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, 5 ms max page write time, and industrial temperature range (–40°C to +85°C). It features hardware write-protection via the WP pin and is supplied in 8-lead SOIC package.
For engineers reviewing the 24LC08BT/ST datasheet, 24LC08BT/ST pinout, 24LC08BT/ST application, or 24LC08BT/ST equivalent, this page delivers verified electrical specs, I²C timing compliance, SOIC package details, endurance (1M cycles), and real-world use cases in embedded configuration storage and sensor calibration data retention.
Technical Context
The 24LC08BT/ST implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs for noise immunity and ground-bounce suppression. Its internal architecture includes a 16-byte page write buffer, address pointer logic, and HV generator for EEPROM programming.
It supports byte and page write modes, current/random/sequential read operations, and acknowledge polling to detect write completion. The device uses a fixed 4-bit control code (1010) with 2-bit block select (B1/B0) and R/W bit - no A0/A1/A2 pins are connected internally.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8), divided into four independent 256-word blocks for selective access |
| VCC Range | 2.5V–5.5V - requires minimum 2.5V supply; not functional below 2.5V |
| Max Clock Frequency | 400 kHz - supports standard-mode I²C; not rated for fast-mode (1 MHz) operation |
| Page Write Buffer | 16 bytes - enables burst writes within a single physical page boundary (0–15, 16–31, etc.) |
| Write Cycle Time | 5 ms maximum - self-timed; no external delay required after Stop condition |
| Endurance & Retention | 1,000,000 erase/write cycles; >200 years data retention at 85°C |
| Operating Temp | –40°C to +85°C (Industrial grade) - validated across full range per DS20001710M |
Pinout & Package
24LC08BT/ST is packaged in an 8-lead SOIC (SN) with standard 150-mil body width and 1.27 mm pitch. Pin 1 is marked with a notch or dot; exposed pad is absent (unlike DFN/TDFN variants).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS (Pin 4) | Ground reference | Must be connected to system GND; serves as return path for all I/O and internal circuitry |
| WP (Pin 7) | Hardware write-protect input | Tie to VSS for full read/write access; tie to VCC to disable all writes (read-only mode) |
| SCL (Pin 6) | Serial clock input | Open-drain compatible; requires external pull-up; synchronizes all I²C transfers |
| SDA (Pin 5) | Serial data I/O | Bidirectional open-drain line; requires external pull-up; carries addresses, commands, and data |
| VCC (Pin 8) | Power supply | 2.5V–5.5V nominal; decoupling capacitor (0.1 µF) recommended near pin |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs on SDA/SCL | Enables reliable operation on noisy PCBs with >50 mV hysteresis (0.05×VCC), rejecting sub-50 ns spikes |
| Output slope control | Prevents ground bounce during signal transitions by limiting edge rate - critical for mixed-signal systems |
| Hardware write-protect (WP) | Physically disables write operations without firmware intervention - prevents accidental overwrites in field-deployed units |
| 16-byte page write buffer | Reduces I²C bus occupancy by up to 94% vs. byte writes when storing contiguous configuration data |
| ESD protection >4 kV | Meets HBM Class 2 requirements - supports handling and assembly without special ESD controls |
Applications
| Industrial Sensor Calibration Storage | Embedded System Configuration Memory |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed at power-up via I²C before ADC initialization. Use Value: Enables one-time calibration during manufacturing; eliminates need for recalibration in field, reducing maintenance cost and downtime. | Use Scenario: Holding user-defined settings (baud rate, network ID, alarm thresholds) in HVAC controller firmware. IC Role / Device Role / Timing Role: Persistent parameter store updated infrequently but read at every boot cycle. Use Value: Survives power loss and firmware updates; supports field reconfiguration without requiring MCU flash wear leveling. |
| Medical Device Parameter Backup | Automotive Body Control Module Settings |
Use Scenario: Retaining therapy parameters and usage logs in portable infusion pumps between battery swaps. IC Role / Device Role / Timing Role: Low-power data logger interfaced to microcontroller via I²C during idle periods. Use Value: 1 µA standby current extends battery life; 1M-cycle endurance supports multi-year device service life. | Use Scenario: Storing seat/mirror position presets and lighting profiles in automotive door modules. IC Role / Device Role / Timing Role: I²C slave device accessed by body controller MCU during vehicle power-on sequence. Use Value: Industrial temp rating (–40°C to +85°C) ensures reliability under hood and cabin extremes; WP pin prevents corruption during CAN bus transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA08T/ST | Wider VCC range (1.7V–5.5V); lower 100 kHz max clock below 2.5V; same 8-lead SOIC package and pinout | Supports battery-powered devices down to 1.7V; unsuitable where 400 kHz I²C speed is mandatory at low voltage | Select when ultra-low-voltage operation is required and clock speed can be reduced below 2.5V |
| AT24C08D-SSHM-T | Same 8 Kbit size and SOIC-8 package; 1.7V–5.5V VCC; 1 MHz fast-mode I²C; different write-protect implementation (software-configurable) | Enables higher throughput in systems with fast-mode I²C masters; lacks hardware WP pin - relies on software lock bits | Select when faster I²C communication is needed and firmware-based protection suffices |
Compared with 24LC08BT/ST, the 24AA08T/ST offers broader supply flexibility at the cost of speed below 2.5V, while the AT24C08D-SSHM-T trades hardware write-protection for 1 MHz I²C performance - making each suitable for distinct power, speed, and security trade-offs.
Availability
24LC08BT/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded configuration storage, and medical device parameter backup requiring stable component supply and long-term lifecycle support.
Supply support for 24LC08BT/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 24LC08B family was designed specifically for cost-sensitive, space-constrained embedded systems needing reliable, low-power nonvolatile storage - especially where I²C bus simplicity and hardware write-protection are prioritized over high-speed operation.
FAQ
What is the minimum supply voltage required for 24LC08BT/ST to operate correctly?
The 24LC08BT/ST requires a minimum VCC of 2.5V per its datasheet (DS20001710M, Table "Device Selection"). Unlike the 24AA08 variant, it is not specified for operation below 2.5V - attempting to run at 1.8V will result in undefined behavior or failure to respond on the I²C bus. Always verify VCC remains ≥2.5V across all operating conditions for 24LC08BT/ST.
Does 24LC08BT/ST support 1 MHz I²C communication?
No, 24LC08BT/ST is rated for a maximum clock frequency of 400 kHz under all valid VCC conditions (2.5V–5.5V). The 1 MHz capability is exclusive to the 24FC08 variant. Using 24LC08BT/ST with a 1 MHz I²C master will cause communication failures due to violated timing parameters such as THIGH, TLOW, and TAA - always configure the master for standard-mode (400 kHz) when using 24LC08BT/ST.
How does the WP pin function on 24LC08BT/ST, and what happens if left unconnected?
On 24LC08BT/ST, the WP pin must be actively tied to either VSS (enable writes) or VCC (disable writes). Leaving it floating is not permitted - the internal state is undefined and may result in intermittent or complete write inhibition. The datasheet explicitly states WP is a logic input with no internal pull-up/down; therefore, a solid connection is mandatory for predictable 24LC08BT/ST operation.
Can 24LC08BT/ST perform page writes across memory block boundaries?
No. Page writes on 24LC08BT/ST are constrained to a single 16-byte physical page (e.g., addresses 0x00–0x0F). Attempting to write across a boundary (e.g., starting at 0x0E and writing 4 bytes) causes wraparound within that page - overwriting earlier bytes instead of advancing to the next block. Software must validate address alignment before initiating page writes to ensure correct 24LC08BT/ST behavior.
Is 24LC08BT/ST qualified for automotive applications?
No, 24LC08BT/ST is specified only for Industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. While the broader 24LC08B family includes automotive-grade variants (e.g., 24LC08BT-I/SM with extended temp and qualification), the /ST suffix denotes SOIC packaging without automotive certification. For automotive body control or infotainment systems, use explicitly AEC-Q100–rated versions - not 24LC08BT/ST.
24LC08BT/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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC08BT/ST FAQ
1.How can I place an order for 24LC08BT/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC08BT/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/ST reliable?
The price and inventory of 24LC08BT/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/ST is usually 5 days.
3.What payment methods are accepted for 24LC08BT/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC08BT/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC08BT/ST?
24LC08BT/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC08BT/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/ST?
For technical support, including 24LC08BT/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC08BT/ST requirements.
6.How does Aetrix verify that 24LC08BT/ST is sourced from the original manufacturer or authorized distributors?
All 24LC08BT/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/ST meets industry standards.
7.What is the process for return or replacement of 24LC08BT/ST?
All 24LC08BT/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC08BT/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/ST part is unused and in its original packaging.
Return procedure for 24LC08BT/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC08BT/ST Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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