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Microchip Technology 24LC04B-E/P
- Part No.:
- 24LC04B-E/P
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
24LC04B-E/P.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,316
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Product details
Overview
24LC04B-E/P 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, 5 ms max page write time, and hardware write-protection via the WP pin - used for nonvolatile parameter storage in embedded control systems.
For engineers reviewing the 24LC04B-E/P datasheet, 24LC04B-E/P pinout, 24LC04B-E/P application, or 24LC04B-E/P equivalent, this page delivers verified electrical specs, package-confirmed pin functions, temperature-grade validation (–40°C to +125°C), I²C timing compliance, and real-world substitution guidance for industrial and automotive designs.
Technical Context
The 24LC04B-E/P implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. It supports standard-mode (100 kHz) and fast-mode (400 kHz) I²C signaling across its full VCC range (2.5V–5.5V) and extended temperature range (–40°C to +125°C).
Internally, it features a 16-byte page write buffer, self-timed erase/write cycles, and an address pointer that auto-increments during sequential reads. The device uses no internal connections for A0–A2 pins, enabling simplified PCB layout and eliminating external address configuration overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (2 × 256 × 8-bit blocks), sufficient for firmware calibration data, device IDs, or configuration registers in space-constrained systems |
| Interface | I²C-compatible two-wire serial bus, compatible with standard and fast-mode I²C controllers without protocol translation |
| VCC Range | 2.5V to 5.5V - supports direct connection to 3.3V or 5V logic domains without level-shifting circuitry |
| Max Clock Frequency | 400 kHz at 2.5V–5.5V - enables ~50 µs per byte transfer, suitable for infrequent but reliable parameter updates |
| Write Cycle Time | ≤5 ms per byte or page - allows predictable timeout handling in host firmware without polling overhead beyond ACK polling |
| Data Retention | >200 years at +25°C - ensures long-term reliability for field-deployed equipment with infrequent writes |
| Endurance | 1 million erase/write cycles - supports robust logging or counter applications requiring frequent updates |
Pinout & Package
24LC04B-E/P is supplied in an 8-Lead Plastic Dual In-Line Package (PDIP) with 300 mil body width, RoHS-compliant matte tin plating, and through-hole mounting compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address Input | No internal connection; may be left floating or tied to VSS/VCC without affecting operation |
| A1 | Address Input | No internal connection; eliminates need for external pull-up/down resistors or address decoding logic |
| A2 | Address Input | No internal connection; simplifies board layout and reduces BOM count versus addressable EEPROM families |
| VSS | Ground Reference | Primary return path for all internal circuitry; must be connected to system ground plane for stable operation |
| SDA | Serial Data I/O | Open-drain bidirectional line requiring external pull-up resistor (2 kΩ typical for 400 kHz); carries addresses, commands, and data |
| SCL | Serial Clock Input | Input-only synchronous clock line driven by master; determines timing for all read/write transactions |
| WP | Write-Protect Control | Active-high hardware lock: tied to VCC disables all writes while permitting unlimited reads |
| VCC | Power Supply | Single 2.5V–5.5V supply input; powers EEPROM core, interface logic, and internal charge pump for write operations |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Write-Protection (WP) | Prevents accidental or malicious overwrites of critical configuration data without software intervention or power cycle |
| 16-Byte Page Write Buffer | Reduces I²C transaction count by up to 16× versus byte-write mode, improving bus efficiency and reducing host CPU overhead |
| Schmitt Trigger Inputs (SCL/SDA) | Rejects sub-50 ns noise spikes on noisy industrial buses, eliminating false Start/Stop detection and communication errors |
| Extended Temperature Range (–40°C to +125°C) | Validated operation in under-hood automotive ECUs, industrial motor drives, and outdoor metering enclosures |
| AEC-Q100 Qualified | Meets automotive reliability stress testing requirements for Grade 1 (–40°C to +125°C), supporting functional safety-critical use cases |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing calibrated sensor offsets, I/O mapping tables, and user-defined logic parameters in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed via I²C during boot or runtime reconfiguration. Use Value: Enables field-upgradable logic without firmware reflashing; WP pin prevents corruption during brown-out events. | Use Scenario: Retaining door lock state, mirror position memory, and lighting profiles across vehicle ignition cycles. IC Role / Device Role / Timing Role: Persistent parameter store interfaced to microcontroller's I²C peripheral during power-up initialization. Use Value: Supports AEC-Q100 Grade 1 operation and >200-year data retention for lifetime vehicle use. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Settings |
Use Scenario: Holding flow rate calibration coefficients, alarm thresholds, and usage logs in battery-powered infusion devices. IC Role / Device Role / Timing Role: Low-power I²C EEPROM accessed only during setup or maintenance mode to minimize energy draw. Use Value: 1 µA standby current extends battery life; 1M endurance supports daily recalibration over 27 years. | Use Scenario: Storing tariff schedules, meter ID, tamper flags, and historical consumption snapshots in ANSI C12.22-compliant meters. IC Role / Device Role / Timing Role: Secure, write-protected storage for regulatory-mandated operational records accessible via isolated I²C interface. Use Value: Hardware WP prevents unauthorized firmware parameter modification; E-temp grade ensures reliability in outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA04-I/P | Wider VCC range (1.7V–5.5V); lower 100 kHz max clock below 2.5V; Industrial temp only (–40°C to +85°C) | Preferred for ultra-low-voltage battery systems (<2.5V) where extended temperature is not required | Select 24AA04-I/P only if operating below 2.5V or cost sensitivity outweighs AEC-Q100 qualification needs |
| AT24C04-10PU-2.7 | Same 4-Kbit size and PDIP-8 package; 2.7V–5.5V VCC; 400 kHz I²C; no AEC-Q100 qualification; 100-year data retention | Used in commercial-grade consumer electronics where automotive qualification is unnecessary | Choose AT24C04-10PU-2.7 for cost-sensitive, non-automotive applications with identical footprint and timing |
Compared with 24AA04-I/P and AT24C04-10PU-2.7, the 24LC04B-E/P uniquely combines extended temperature support (–40°C to +125°C), AEC-Q100 qualification, and hardware write-protection - making it the only option qualified for under-hood automotive and high-reliability industrial deployments requiring guaranteed data integrity across thermal extremes.
Availability
24LC04B-E/P is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for 24LC04B-E/P 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 24LC04B-E/P belongs to Microchip's 24XX04 family of I²C serial EEPROMs, designed specifically for robust, low-power nonvolatile data storage in automotive, industrial, and medical systems demanding extended temperature operation and high reliability.
FAQ
What is the maximum clock frequency supported by the 24LC04B-E/P?
The 24LC04B-E/P supports a maximum I²C clock frequency of 400 kHz when operated within its specified VCC range of 2.5V to 5.5V. At voltages below 2.5V, the device is not rated for operation - unlike the 24AA04, which supports 100 kHz down to 1.7V. This 400 kHz limit enables efficient parameter updates while maintaining signal integrity on standard PCB traces.
Does the 24LC04B-E/P require external pull-up resistors on SDA and SCL lines?
Yes, the 24LC04B-E/P requires external pull-up resistors on both SDA and SCL lines because these pins are open-drain. For 400 kHz operation, a typical value is 2 kΩ to VCC. The absence of internal pull-ups ensures compatibility with mixed-voltage I²C buses and avoids contention when multiple devices share the bus.
How does the Write-Protect (WP) pin function on the 24LC04B-E/P?
When the WP pin of the 24LC04B-E/P is tied to VCC, all write operations - including byte and page writes - are inhibited, while read operations remain fully functional. When tied to VSS (or left floating, though not recommended), normal read/write access is enabled. This hardware-level protection prevents accidental overwrites during power transients or firmware faults.
Is the 24LC04B-E/P pin-compatible with other packages in the 24XX04 family?
Yes, the 24LC04B-E/P in PDIP-8 shares identical pinout and functionality with all other 8-lead packages in the 24XX04 family (SOIC, MSOP, TSSOP, DFN, etc.), including matching pin assignments for VCC, VSS, SDA, SCL, WP, and unconnected A0–A2. This enables drop-in replacement across form factors without layout changes.
What is the endurance rating of the 24LC04B-E/P, and how is it validated?
The 24LC04B-E/P is rated for more than 1 million erase/write cycles per memory location, validated at +25°C and 5.5V using page-mode programming. This endurance supports daily writes for over 27 years and is guaranteed across the full extended temperature range (–40°C to +125°C) per AEC-Q100 stress testing protocols.
24LC04B-E/P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
24LC04B-E/P FAQ
1.How can I place an order for 24LC04B-E/P through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC04B-E/P 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 24LC04B-E/P reliable?
The price and inventory of 24LC04B-E/P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC04B-E/P is usually 5 days.
3.What payment methods are accepted for 24LC04B-E/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC04B-E/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC04B-E/P?
24LC04B-E/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC04B-E/P 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 24LC04B-E/P?
For technical support, including 24LC04B-E/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC04B-E/P requirements.
6.How does Aetrix verify that 24LC04B-E/P is sourced from the original manufacturer or authorized distributors?
All 24LC04B-E/P 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 24LC04B-E/P meets industry standards.
7.What is the process for return or replacement of 24LC04B-E/P?
All 24LC04B-E/P units undergo pre-shipment inspection (PSI). If there is an issue with 24LC04B-E/P, 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 24LC04B-E/P part is unused and in its original packaging.
Return procedure for 24LC04B-E/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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