My Inquiry
My Account
Microchip Technology 24LC08BT-I/OT
- Part No.:
- 24LC08BT-I/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SC-74A, SOT-753
- Datasheet:
-
24LC08BT-I/OT.pdf
- Description:
- IC EEPROM 8KBIT I2C SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,030
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
24LC08BT-I/OT 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, 16-byte page write buffer, and Schmitt-trigger inputs for noise immunity - deployed in embedded system configuration storage and sensor calibration data retention.
For engineers reviewing the 24LC08BT-I/OT datasheet, 24LC08BT-I/OT pinout, 24LC08BT-I/OT application, or 24LC08BT-I/OT equivalent, key selection criteria include VCC min (2.5V), I²C speed grade (400 kHz), SOIC-8 package compatibility, WP pin functionality, and endurance (>1 million cycles) for field-updatable firmware parameter storage.
Technical Context
The 24LC08BT-I/OT implements a two-wire I²C interface with fixed 4-bit device code '1010', block-select addressing (B1/B0 bits), and R/W bit control. Its internal architecture includes a 16-byte page latch, HV generator for EEPROM programming, and address pointer auto-increment logic supporting current-address, random, and sequential read modes.
Write protection is implemented via dedicated WP pin tied to VCC (full-array lockout) or VSS (enabled), with no internal connection to A0/A1/A2 pins. The device uses open-drain SDA/SCL with external pull-ups and supports acknowledge polling to detect write cycle completion without fixed timing delays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8), organized as four independent 256-word blocks for segmented configuration storage |
| VCC Range | 2.5V to 5.5V - mandates minimum 2.5V supply; not operable below this threshold |
| I²C Clock Frequency | Up to 400 kHz - supports standard-mode I²C bus timing with THIGH ≥ 600 ns and TLOW ≥ 1300 ns |
| Page Write Buffer | 16 bytes - enables burst writes within a single physical page boundary (0–15, 16–31, etc.) |
| Write Cycle Time | Max 5 ms - defines worst-case delay before next valid command; self-timed, no external wait states required |
| Endurance & Retention | 1,000,000 erase/write cycles and >200 years data retention at 25°C - validated for long-life industrial logging applications |
| Operating Temperature | –40°C to +85°C (Industrial grade) - qualified for deployment in automotive body control modules and industrial PLCs |
Pinout & Package
24LC08BT-I/OT is supplied in 8-Lead SOIC (SN) package per Microchip drawing C04-057-SN Rev F, with 1.27 mm pitch, 3.90 mm body width, and gull-wing leads. Pin 1 is marked by notch or bevel on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS (Pin 4) | Ground reference | Return path for all internal circuitry; must be low-impedance connection to system GND plane |
| WP (Pin 7) | Hardware write-protect input | Logic-high = full memory array locked against writes; logic-low = normal read/write operation enabled |
| SCL (Pin 6) | Serial clock input | Open-drain input synchronized to host MCU's I²C clock; requires external pull-up resistor (2 kΩ typical) |
| SDA (Pin 5) | Serial data bidirectional I/O | Open-drain bidirectional line for address/data transfer; shares pull-up with SCL in standard I²C topology |
| VCC (Pin 8) | Power supply | 2.5V–5.5V DC input; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs on SDA/SCL | Enables reliable operation on noisy industrial buses with >50 mV hysteresis (0.05×VCC) suppressing EMI-induced glitches |
| Output slope control | Prevents ground bounce during signal transitions, eliminating false Start/Stop detection in high-speed PCB layouts |
| 16-byte page write buffer | Reduces I²C transaction overhead by up to 16× vs. byte-write mode - critical for efficient firmware parameter updates |
| Hardware write-protect (WP pin) | Provides tamper-resistant configuration lockdown without software intervention - essential for safety-critical calibration data |
| ESD protection >4 kV | Meets IEC 61000-4-2 Level 3 requirements, enabling direct handling in manufacturing without special ESD controls |
Applications
| Industrial Sensor Calibration Storage | Automotive Body Control Module |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for temperature, pressure, and humidity sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding calibrated constants accessed at power-on reset via I²C. Use Value: Eliminates need for external trimming potentiometers; enables field recalibration with verified 1M-cycle endurance and 200-year data retention. | Use Scenario: Saving user preferences (mirror position, seat memory, lighting profiles) and fault logs in 12V automotive body domain controllers. IC Role / Device Role / Timing Role: I²C slave EEPROM interfaced to 8-bit/16-bit microcontroller for persistent parameter storage across ignition cycles. Use Value: WP pin allows OEMs to lock critical safety parameters post-assembly while permitting user-modifiable settings via controlled write sequences. |
| Medical Device Configuration Backup | Smart Energy Meter Firmware Parameters |
Use Scenario: Retaining regulatory-compliant operational limits, calibration history, and audit trail metadata in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, low-power configuration store accessed only during boot or maintenance mode over isolated I²C bus. Use Value: Industrial temp rating (–40°C to +85°C) ensures reliability in sterilization environments; >4 kV ESD protects against clinical handling discharge events. | Use Scenario: Holding tariff tables, metering constants, and communication protocol keys in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: Tamper-evident nonvolatile memory with hardware write-protection to prevent unauthorized firmware parameter modification. Use Value: Page write capability enables atomic update of multi-byte tariff structures; 2.5V min VCC supports brown-out resilience during grid voltage sags. |
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/OT | Wider VCC range (1.7V–5.5V); same 400 kHz speed but de-rates to 100 kHz below 2.5V | Supports battery-powered devices with <2.5V operation; lacks 24LC08B's guaranteed 2.5V startup | Select when ultra-low-voltage operation is required; verify I²C timing margins at sub-2.5V rails |
| AT24C08D-SSHM-T | Same 8-Kbit size, SOIC-8, and I²C interface; rated for 1 MHz (vs. 400 kHz), but requires 1.7V–5.5V supply | Higher speed enables faster firmware updates; not qualified for industrial temp range (only –40°C to +85°C with derated specs) | Choose for throughput-critical designs where 1 MHz timing and 1.7V operation outweigh Microchip ecosystem alignment |
Compared with 24LC08BT-I/OT, the 24AA08T-I/OT extends voltage flexibility at the cost of guaranteed low-VCC timing, while AT24C08D-SSHM-T trades industrial-grade thermal validation for higher I²C bandwidth - making 24LC08BT-I/OT optimal for cost-sensitive, thermally demanding industrial control nodes requiring deterministic 2.5V+ operation.
Availability
24LC08BT-I/OT is available at Aetrix Electronics and suitable for industrial sensor calibration storage, automotive body control modules, medical device configuration backup, and smart energy meter firmware parameter retention requiring stable component supply across extended production lifecycles.
Supply support for 24LC08BT-I/OT 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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and memory products, with global design centers and ISO 9001-certified manufacturing.
The 24LC08B series is part of Microchip's serial EEPROM product line designed specifically for robust, low-power, I²C-based configuration and calibration data storage in industrial, automotive, and medical systems.
FAQ
What is the minimum supply voltage required for reliable operation of the 24LC08BT-I/OT?
The 24LC08BT-I/OT requires a minimum VCC of 2.5V for guaranteed operation across its full industrial temperature range (–40°C to +85°C). Unlike the 24AA08 variant, it is not characterized or specified for operation below 2.5V - attempting to power the 24LC08BT-I/OT at 1.8V or 2.2V may result in undefined behavior, failed writes, or I²C communication timeouts. Always confirm VCC remains ≥2.5V under worst-case load and temperature conditions.
Does the 24LC08BT-I/OT support 1 MHz I²C communication?
No, the 24LC08BT-I/OT is rated for a maximum clock frequency of 400 kHz under all specified conditions (2.5V–5.5V, –40°C to +85°C). While some units may function at 1 MHz in lab conditions, Microchip does not guarantee timing compliance above 400 kHz for this variant. For 1 MHz I²C support, consider the 24FC08 family instead - the 24LC08BT-I/OT must be configured for standard-mode I²C with THIGH ≥ 600 ns and TLOW ≥ 1300 ns.
How does the WP pin function on the 24LC08BT-I/OT, and what happens if left unconnected?
On the 24LC08BT-I/OT, the WP pin is a dedicated hardware write-protect input: tied to VCC, it disables all write operations (including page and byte writes) while allowing unrestricted reads; tied to VSS, it enables full read/write access. If left floating, the pin state is indeterminate and may cause intermittent write failures or unintended protection - Microchip explicitly requires WP to be actively driven to VCC or VSS. No internal pull-up/down is provided.
Can the 24LC08BT-I/OT be used in place of the 24LC08B-I/P (PDIP package) without PCB changes?
Yes - the 24LC08BT-I/OT (SOIC-8) and 24LC08B-I/P (PDIP-8) share identical pinout, electrical specifications, and functional behavior. Both use the same 8-pin arrangement: VSS (4), WP (7), SCL (6), SDA (5), VCC (8), with A0/A1/A2 unconnected. However, mechanical footprint differs: SOIC-8 has 1.27 mm pitch and 3.90 mm body width, while PDIP-8 uses 2.54 mm pitch and 9.14 mm width. PCB layout must match the chosen package; no electrical redesign is needed.
What is the maximum number of bytes that can be written in a single page write operation for the 24LC08BT-I/OT?
The 24LC08BT-I/OT supports a maximum of 16 bytes per page write operation, aligned to physical page boundaries (e.g., addresses 0x00–0x0F, 0x10–0x1F). Attempting to write more than 16 bytes before issuing a Stop condition causes the address pointer to roll over within the same page, overwriting earlier data. To avoid corruption, firmware must split writes crossing page boundaries - for example, writing 0x0E–0x11 requires two separate page writes (0x0E–0x0F and 0x10–0x11).
24LC08BT-I/OT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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:
- SOT-23-5
24LC08BT-I/OT FAQ
1.How can I place an order for 24LC08BT-I/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC08BT-I/OT 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/OT reliable?
The price and inventory of 24LC08BT-I/OT 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/OT is usually 5 days.
3.What payment methods are accepted for 24LC08BT-I/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC08BT-I/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC08BT-I/OT?
24LC08BT-I/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC08BT-I/OT 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/OT?
For technical support, including 24LC08BT-I/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC08BT-I/OT requirements.
6.How does Aetrix verify that 24LC08BT-I/OT is sourced from the original manufacturer or authorized distributors?
All 24LC08BT-I/OT 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/OT meets industry standards.
7.What is the process for return or replacement of 24LC08BT-I/OT?
All 24LC08BT-I/OT units undergo pre-shipment inspection (PSI). If there is an issue with 24LC08BT-I/OT, 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/OT part is unused and in its original packaging.
Return procedure for 24LC08BT-I/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC08BT-I/OT 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
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
