Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Memory > Memory

Microchip Technology 24LC04B-E/SN

Name: 24LC04B-E/SN
Brand: Microchip Technology
SKU: 24LC04B-E/SN
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: 24LC04B-E/SN

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: 24LC04B-E/SN.pdf

Description:: IC EEPROM 4KBIT I2C 400KHZ 8SOIC

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,482

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

24LC04B-E/SN 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 industrial/extended temperature support (–40°C to +125°C). It serves as nonvolatile configuration storage in microcontroller-based systems requiring low-power, noise-immune bus interfacing.

For engineers reviewing the 24LC04B-E/SN datasheet, 24LC04B-E/SN pinout, 24LC04B-E/SN application, or 24LC04B-E/SN equivalent, this page delivers verified electrical specs, SOIC-8 pin mapping, I²C timing compliance, hardware write-protection behavior, and validated alternative parts for design-in and supply continuity.

Technical Context

The 24LC04B-E/SN implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress ground bounce and bus noise. Its internal address pointer supports current-address, random, and sequential read modes, while the 16-byte page buffer enables efficient multi-byte writes without host-side buffering.

Write protection is implemented via the dedicated WP pin: tied to VSS for full read/write access, or to VCC to inhibit all write operations across the entire 000h–1FFh memory space. Acknowledge polling is supported to detect write-cycle completion without fixed delays.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	4 Kbit (512 bytes), organized as two independent 256 × 8-bit blocks for flexible block-level addressing
Interface	I²C-compatible two-wire serial bus with 100 kHz / 400 kHz operation; no external clock required
V_CC Range	2.5V to 5.5V - ensures compatibility with 3.3V and 5V logic domains without level shifting
Page Write Buffer	16-byte buffer - reduces I²C transaction overhead by enabling burst writes within a single page boundary
Endurance & Retention	1 million erase/write cycles and >200 years data retention - suitable for long-life industrial firmware storage
ESD Protection	>4,000V HBM - provides robustness against handling and board-level electrostatic discharge events
Temp. Range	–40°C to +125°C (Extended grade) - qualified for under-hood automotive and high-temp industrial environments

Pinout & Package

24LC04B-E/SN is supplied in an 8-lead narrow-body SOIC package (SN), measuring 3.90 mm × 4.90 mm × 1.25 mm (JEDEC MS-012AA), with gull-wing leads and matte tin finish.

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 - unused per device architecture; no impact on I²C address resolution
A2	Address Input	No internal connection - not part of client address generation; ignored during bus communication
VSS	Ground Reference	Primary return path for all internal circuitry; must be connected to system GND for stable biasing
SDA	Serial Data I/O	Open-drain bidirectional bus line - requires external pull-up resistor (2 kΩ typical for 400 kHz)
SCL	Serial Clock Input	Master-generated clock signal - synchronizes all address/data transfers; Schmitt-trigger input rejects noise
WP	Write-Protect Control	Hardware-enforced memory lock - tied to VCC disables all write commands; tied to VSS enables full access
VCC	Power Supply	Single-supply input for core logic and EEPROM array - must remain within 2.5V–5.5V during all operations

Key Features

Feature	Design Value
Hardware Write-Protection	Physical WP pin disables all write operations when pulled high - eliminates risk of accidental firmware corruption
Schmitt Trigger Inputs	Input hysteresis ≥0.05×V_CC - ensures reliable SDA/SCL state detection on noisy PCB traces or long cables
Self-Timed Write Cycle	Internal 5 ms max erase/write - removes need for host software delay loops; supports ACK polling for deterministic timing
Low-Power Operation	1 µA max standby current at I-temp, 5 µA at E-temp - extends battery life in always-on sensor nodes
I²C Bus Compatibility	Fully compliant with standard-mode (100 kHz) and fast-mode (400 kHz) I²C specifications - interoperable with MCU peripherals without protocol translation

Applications

Industrial Sensor Calibration	Automotive Body Control Module
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 holding trim values accessed at power-up by host MCU via I²C. Use Value: Enables field-replaceable sensors without reprogramming; WP pin prevents runtime corruption during CAN bus activity.	Use Scenario: Retaining seat position memory, mirror settings, and lighting profiles in vehicle door modules. IC Role / Device Role / Timing Role: Persistent parameter store accessed during ignition-on sequence using standard I²C read bursts. Use Value: AEC-Q100 qualification and –40°C to +125°C operation ensure reliability in under-dash thermal environments.
Medical Infusion Pump Settings	Smart Energy Meter Firmware Storage
Use Scenario: Saving user-defined dosing parameters and audit logs in Class II medical devices with battery backup. IC Role / Device Role / Timing Role: Secure configuration EEPROM interfaced to ARM Cortex-M0+ MCU over isolated I²C bus. Use Value: 1M endurance and >200-year data retention meet IEC 62304 safety requirements for critical parameter persistence.	Use Scenario: Storing tariff tables, meter calibration constants, and firmware update flags in ANSI C12.22-compliant meters. IC Role / Device Role / Timing Role: Tamper-resistant memory element with WP pin hardwired to prevent unauthorized configuration changes. Use Value: RoHS compliance and extended temperature range support outdoor pole-mount deployment in varying climates.

Industrial Sensor Calibration

Automotive Body Control Module

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 holding trim values accessed at power-up by host MCU via I²C.

Use Value: Enables field-replaceable sensors without reprogramming; WP pin prevents runtime corruption during CAN bus activity.

Use Scenario: Retaining seat position memory, mirror settings, and lighting profiles in vehicle door modules.

IC Role / Device Role / Timing Role: Persistent parameter store accessed during ignition-on sequence using standard I²C read bursts.

Use Value: AEC-Q100 qualification and –40°C to +125°C operation ensure reliability in under-dash thermal environments.

Medical Infusion Pump Settings

Smart Energy Meter Firmware Storage

Use Scenario: Saving user-defined dosing parameters and audit logs in Class II medical devices with battery backup.

IC Role / Device Role / Timing Role: Secure configuration EEPROM interfaced to ARM Cortex-M0+ MCU over isolated I²C bus.

Use Value: 1M endurance and >200-year data retention meet IEC 62304 safety requirements for critical parameter persistence.

Use Scenario: Storing tariff tables, meter calibration constants, and firmware update flags in ANSI C12.22-compliant meters.

IC Role / Device Role / Timing Role: Tamper-resistant memory element with WP pin hardwired to prevent unauthorized configuration changes.

Use Value: RoHS compliance and extended temperature range support outdoor pole-mount deployment in varying climates.

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/SN	Wider V_CC range (1.7V–5.5V); lower 100 kHz max clock below 2.5V; Industrial temp only (–40°C to +85°C)	Preferred for 1.8V/2.5V systems where extended temperature is unnecessary	Select when operating below 2.5V or when cost sensitivity outweighs extended temp requirement
AT24C04-10PU-2.7	Same 4-Kbit size and SOIC-8 package; 2.7V–5.5V V_CC; 400 kHz I²C; 1M endurance; but lacks AEC-Q100 qualification	Suitable for commercial-grade consumer electronics, not automotive or harsh industrial use	Choose for cost-sensitive non-automotive designs where AEC-Q100 is not mandated

Compared with 24LC04B-E/SN, the 24AA04-I/SN offers broader voltage flexibility at the expense of temperature range, while the AT24C04-10PU-2.7 matches key electrical specs but omits automotive qualification - making 24LC04B-E/SN the sole choice for extended-temp, AEC-Q100-compliant deployments.

Availability

24LC04B-E/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical infusion pump settings, and smart energy meter firmware storage requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 24LC04B-E/SN 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, FPGA, and memory solutions, serving industrial, automotive, and communications markets with high-reliability semiconductor products.

The 24LC04B belongs to Microchip's serial EEPROM product line, designed specifically for robust, low-power, I²C-based nonvolatile storage in space-constrained embedded systems requiring extended temperature operation and AEC-Q100 compliance.

FAQ

What is the maximum I²C clock frequency supported by the 24LC04B-E/SN?

The 24LC04B-E/SN supports up to 400 kHz I²C clock frequency when V_CC is between 2.5V and 5.5V. At voltages below 2.5V, operation is limited to 100 kHz - though the 24LC04B-E/SN is not rated for sub-2.5V operation per its datasheet. This 400 kHz capability enables faster configuration reads and writes compared to legacy 100 kHz EEPROMs, reducing boot-time latency in host MCU initialization sequences.

Does the 24LC04B-E/SN require external pull-up resistors on SDA and SCL lines?

Yes, the 24LC04B-E/SN requires external pull-up resistors on both SDA and SCL lines because it uses open-drain outputs. A 2 kΩ resistor is recommended for 400 kHz operation at 5V, while 10 kΩ is typical for 100 kHz at 5V. The exact value depends on bus capacitance and rise-time requirements; insufficient pull-up strength causes I²C communication failures due to slow signal transitions.

How does the WP pin function on the 24LC04B-E/SN?

The WP (Write-Protect) pin on the 24LC04B-E/SN is a hardware-level enable/disable control: when tied to VCC, all write operations (byte and page) to the entire 000h–1FFh memory space are inhibited, while read operations remain fully functional. When tied to VSS, normal read/write access is enabled. This pin provides deterministic, glitch-immune protection against firmware corruption during system resets or power transients.

What is the memory organization of the 24LC04B-E/SN?

The 24LC04B-E/SN contains 4 Kbit (512 bytes) of EEPROM memory organized into two independent 256 × 8-bit blocks. Block selection is controlled by bit B0 in the I²C control byte, allowing the host to address either block (000h–0FFh or 100h–1FFh) without remapping. This dual-block structure simplifies partitioned storage of configuration data and calibration parameters in resource-constrained systems.

Is the 24LC04B-E/SN AEC-Q100 qualified?

Yes, the 24LC04B-E/SN is AEC-Q100 qualified for automotive applications. Its Extended temperature grade (–40°C to +125°C) and qualification testing per AEC-Q100 Rev G ensure reliability in under-hood and cabin electronics. This certification covers stress tests including HTOL, TCT, ESD, and AC/DC parametric verification - confirming suitability for safety-critical automotive subsystems such as body control modules and ADAS sensor interfaces.

24LC04B-E/SN Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

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:: Surface Mount

Supplier Device Package:: 8-SOIC

24LC04B-E/SN FAQ

1.How can I place an order for 24LC04B-E/SN through Aetrix?

Please submit a Request for Quotation (RFQ) for 24LC04B-E/SN 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/SN reliable?

The price and inventory of 24LC04B-E/SN 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/SN is usually 5 days.

3.What payment methods are accepted for 24LC04B-E/SN?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC04B-E/SN transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 24LC04B-E/SN?

24LC04B-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 24LC04B-E/SN 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/SN?

For technical support, including 24LC04B-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC04B-E/SN requirements.

6.How does Aetrix verify that 24LC04B-E/SN is sourced from the original manufacturer or authorized distributors?

All 24LC04B-E/SN 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/SN meets industry standards.

7.What is the process for return or replacement of 24LC04B-E/SN?

All 24LC04B-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24LC04B-E/SN, 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/SN part is unused and in its original packaging.

Return procedure for 24LC04B-E/SN:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

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.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

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…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

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…