My Inquiry
My Account
Microchip Technology 24LC04BT-I/OT
- Part No.:
- 24LC04BT-I/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SC-74A, SOT-753
- Datasheet:
-
24LC04BT-I/OT.pdf
- Description:
- IC EEPROM 4KBIT I2C SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:6,583
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
24LC04BT-I/OT from Microchip Technology Inc. is a 4-Kbit I²C-compatible serial EEPROM organized as two 256 × 8-bit blocks, operating from 2.5V to 5.5V with 400 kHz max clock frequency, 1 µA standby current, and hardware write-protection via the WP pin-used for parameter storage in industrial sensor modules, power supply configuration, and embedded system boot settings.
For engineers reviewing the 24LC04BT-I/OT datasheet, 24LC04BT-I/OT pinout, 24LC04BT-I/OT application, or 24LC04BT-I/OT equivalent, this page delivers verified electrical specs, I²C timing compliance (100/400 kHz), package-confirmed SOT-23 pin mapping, endurance (1M cycles), and real-world use cases in automotive subsystems and industrial controllers.
Technical Context
The 24LC04BT-I/OT implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal address pointer supports current-address, random, and sequential reads across two independent 256-byte memory blocks.
Write operations include byte-write and 16-byte page-write modes with self-timed erase/write cycles (max 5 ms). The WP pin enables full-array hardware write-protection when tied to VCC, while A0–A2 pins are unconnected and may be left floating or tied to VSS/VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (2 × 256 × 8-bit blocks) - provides nonvolatile storage for dual-parameter sets without external addressing logic |
| VCC Range | 2.5V to 5.5V - compatible with standard 3.3V and 5V microcontroller I/O domains |
| Max Clock Frequency | 400 kHz - supports high-speed I²C communication in real-time control loops |
| Page Write Buffer | 16 bytes - reduces bus overhead by enabling burst writes within a single physical page boundary |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in field-updatable firmware or calibration data logging |
| Data Retention | 200 years - guarantees persistent storage of critical configuration data over product lifetime |
| Standby Current | 1 µA (I-temp.) - minimizes quiescent power draw in battery-backed or energy-harvesting systems |
Pinout & Package
24LC04BT-I/OT uses the 5-lead SOT-23 package (JEDEC MO-178AA), with leads arranged in a single row. Pin 1 is SCL, Pin 2 is VSS, Pin 3 is SDA, Pin 4 is WP, and Pin 5 is VCC. A0–A2 pins are not internally connected and omitted from this package variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL | Serial Clock Input | Synchronizes all I²C transactions; requires external pull-up resistor (2 kΩ typical for 400 kHz) |
| VSS | Ground Reference | Primary return path for all internal circuitry and I/O signals |
| SDA | Bidirectional Data I/O | Open-drain interface requiring external pull-up; carries addresses, commands, and data |
| WP | Hardware Write-Protect Input | Tied to VCC to disable all write operations; tied to VSS to enable full read/write access |
| VCC | Power Supply | Supplies core logic and EEPROM array; must remain stable during write cycles to prevent corruption |
Key Features
| Feature | Design Value |
|---|---|
| I²C Bus Compatibility | Fully compliant with standard-mode (100 kHz) and fast-mode (400 kHz) I²C specifications, including Start/Stop detection and ACK polling |
| Noise Immunity | Schmitt-trigger inputs and input filter spike suppression (50 ns) ensure robust operation on electrically noisy PCBs |
| Page Write Efficiency | 16-byte buffer enables up to 16× reduction in I²C transaction count versus byte-wise writes |
| Hardware Write Protection | Dedicated WP pin allows irreversible lock of entire memory array without software intervention or firmware dependency |
| Extended Temperature Support | Rated for -40°C to +85°C (Industrial grade), validated for continuous operation in motor drives and outdoor instrumentation |
Applications
| Industrial Sensor Calibration | Power Supply Configuration |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients and temperature compensation tables in analog sensor front-ends. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed at power-on reset via I²C by host MCU before signal acquisition begins. Use Value: Eliminates need for external trimming components and enables field recalibration without hardware modification. |
Use Scenario: Holding programmable voltage/current limits, soft-start profiles, and fault recovery settings in digitally controlled DC-DC modules. IC Role / Device Role / Timing Role: Persistent configuration register mapped to I²C slave address 0xA0/0xA1, updated only during maintenance mode. Use Value: Enables one-time setup and secure runtime protection via WP pin, preventing accidental overwrite during transient events. |
| Automotive Subsystem Boot Settings | Embedded Controller Parameter Storage |
Use Scenario: Saving user-selected display brightness, HVAC presets, and CAN node ID in automotive body control modules. IC Role / Device Role / Timing Role: I²C client storing 4Kb of infotainment and comfort feature preferences, accessed during cold boot sequence. Use Value: Meets AEC-Q100 Grade 2 requirements and retains data across 15+ year vehicle service life. |
Use Scenario: Maintaining network IP address, MAC address, and security keys in industrial Ethernet gateways and PLC edge devices. IC Role / Device Role / Timing Role: Secure, low-power configuration store interfaced to ARM Cortex-M host via standard I²C driver stack. Use Value: Supports encrypted key storage with hardware write-protection, reducing attack surface versus SRAM-based alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA04T-I/OT | Lower VCC min (1.7V), same 400 kHz max clock, identical 5-lead SOT-23 package and pinout | Preferred for 1.8V/2.5V systems; unsuitable where 2.5V minimum supply is enforced | Select when operating below 2.5V; verify I²C pull-up resistor value matches lower VCC |
| AT24C04-SSHM-T | Same 4Kbit capacity, 1.8V–5.5V range, but rated only to 100 kHz standard-mode I²C (not 400 kHz fast-mode) | Acceptable for low-speed configuration storage; not suitable for time-critical parameter updates | Choose for cost-sensitive designs where bus speed < 100 kHz suffices and Microchip sourcing is constrained |
Compared with 24LC04BT-I/OT, the 24AA04T-I/OT extends low-voltage operation but shares identical timing and packaging, while the AT24C04-SSHM-T trades speed for broader voltage range and alternate manufacturer support-making each viable only within their validated electrical envelopes.
Availability
24LC04BT-I/OT is available at Aetrix Electronics and suitable for industrial sensor calibration, power supply configuration, and automotive subsystem boot settings requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for 24LC04BT-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 leading provider of microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing infrastructure.
The 24LC04B family was designed specifically for reliable, low-power I²C-based configuration and calibration storage in industrial, automotive, and consumer systems-emphasizing write endurance, data retention, and noise-immune bus interface.
FAQ
What is the maximum I²C clock frequency supported by the 24LC04BT-I/OT?
The 24LC04BT-I/OT supports up to 400 kHz I²C clock frequency when VCC is between 2.5V and 5.5V. At voltages below 2.5V, it defaults to 100 kHz standard-mode operation-but the 24LC04BT-I/OT is specified only for 2.5V minimum, so 400 kHz is its guaranteed maximum. This enables faster parameter loading in time-sensitive embedded applications compared to legacy 100 kHz EEPROMs.
Does the 24LC04BT-I/OT require external pull-up resistors on SDA and SCL lines?
Yes, the 24LC04BT-I/OT requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. For 400 kHz operation, a 2 kΩ resistor to VCC is recommended; for 100 kHz, 10 kΩ is typical. These values ensure proper rise times per I²C specification and prevent bus contention in multi-slave configurations using the 24LC04BT-I/OT.
How does hardware write-protection work on the 24LC04BT-I/OT?
The WP pin on the 24LC04BT-I/OT enables full-array hardware write-protection: when tied to VCC, all write operations (byte and page) are inhibited while read access remains fully functional. When tied to VSS, normal read/write operation is enabled. This eliminates reliance on software locks and prevents accidental or malicious overwrites during system operation-critical for safety-critical 24LC04BT-I/OT deployments.
What is the page size and write cycle time for the 24LC04BT-I/OT?
The 24LC04BT-I/OT has a 16-byte page buffer and a maximum write cycle time of 5 ms for both byte and page writes. Page writes must stay within a single physical page boundary (addresses 0x00–0x0F, 0x10–0x1F, etc.); crossing boundaries causes wraparound. This 5 ms self-timed cycle allows the host MCU to poll for completion via ACK polling-optimizing I²C bus utilization in systems using the 24LC04BT-I/OT.
Is the 24LC04BT-I/OT AEC-Q100 qualified and what temperature range does it support?
Yes, the 24LC04BT-I/OT is AEC-Q100 qualified for Automotive Grade 3 (–40°C to +85°C), matching its Industrial (I) temperature rating. It is not rated for Extended (E) temperature range (–40°C to +125°C). This qualification validates its reliability in under-hood and cabin electronics, making the 24LC04BT-I/OT suitable for automotive body control, lighting, and infotainment subsystems.
24LC04BT-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:
- 4Kbit
- Memory Organization:
- 256 x 8 x 2
- 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
24LC04BT-I/OT FAQ
1.How can I place an order for 24LC04BT-I/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC04BT-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 24LC04BT-I/OT reliable?
The price and inventory of 24LC04BT-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 24LC04BT-I/OT is usually 5 days.
3.What payment methods are accepted for 24LC04BT-I/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC04BT-I/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC04BT-I/OT?
24LC04BT-I/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC04BT-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 24LC04BT-I/OT?
For technical support, including 24LC04BT-I/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC04BT-I/OT requirements.
6.How does Aetrix verify that 24LC04BT-I/OT is sourced from the original manufacturer or authorized distributors?
All 24LC04BT-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 24LC04BT-I/OT meets industry standards.
7.What is the process for return or replacement of 24LC04BT-I/OT?
All 24LC04BT-I/OT units undergo pre-shipment inspection (PSI). If there is an issue with 24LC04BT-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 24LC04BT-I/OT part is unused and in its original packaging.
Return procedure for 24LC04BT-I/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC04BT-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…
