My Inquiry
My Account
Microchip Technology 24LC04BH-I/ST
- Part No.:
- 24LC04BH-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC04BH-I/ST.pdf
- Description:
- IC EEPROM 4KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,811
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
24LC04BH-I/ST 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 (I-temp), and hardware write-protect for half-array (100h–1FFh). It is used in embedded systems for storing calibration data, configuration settings, and firmware parameters in industrial controllers and sensor nodes.
For engineers reviewing the 24LC04BH-I/ST datasheet, 24LC04BH-I/ST pinout, 24LC04BH-I/ST application, or 24LC04BH-I/ST equivalent, key selection criteria include its 2.5V minimum VCC, industrial temperature range (–40°C to +85°C), 16-byte page write buffer, Schmitt-trigger I²C inputs, and TSSOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
The 24LC04BH-I/ST implements a two-wire I²C interface with fixed 4-bit device code '1010', block-select addressing via B0 bit, and no internal connection to A0–A2 pins. Its memory architecture supports byte and page writes (up to 16 bytes per page), with self-timed erase/write cycles completing in ≤5 ms.
Write protection is controlled by the WP pin: tied to VSS enables full-array access; tied to VCC locks addresses 100h–1FFh. The device uses Schmitt-trigger inputs and output slope control to suppress noise and eliminate ground bounce on shared I²C buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (512 bytes), organized as two 256 × 8-bit blocks - enables segmented storage of independent configuration sets. |
| VCC Range | 2.5V to 5.5V - compatible with 3.3V and 5V logic domains without level shifting. |
| Max Clock Frequency | 400 kHz at VCC ≥ 2.5V - supports high-speed I²C communication while maintaining timing margin in noisy environments. |
| Standby Current | 1 µA maximum (I-temp) - critical for battery-powered devices requiring ultra-low quiescent power. |
| Page Write Buffer | 16 bytes - reduces I²C transaction count when updating contiguous configuration data, improving bus efficiency. |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in field-updatable systems with frequent parameter logging. |
| Data Retention | 200 years - guarantees nonvolatile storage integrity across product lifecycle without refresh. |
Pinout & Package
24LC04BH-I/ST is packaged in an 8-lead TSSOP (Thin Shrink Small Outline Package) with 0.65 mm pitch, 3.0 mm × 4.4 mm body size, and exposed pad optional for thermal relief. Pin 1 is marked with a dot or notch; pin numbering follows standard TSSOP convention (counterclockwise from top-left corner).
| 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; does not participate in I²C device addressing. |
| A2 | Address Input | No internal connection - functionally inert; eliminates need for external pull-up/down resistors. |
| VSS | Ground | Reference return path for all internal circuitry and I²C bus signals. |
| SDA | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up resistor (2 kΩ typical for 400 kHz). |
| SCL | Serial Clock Input | Input-only clock line synchronized to host controller; determines data transfer rate and timing windows. |
| WP | Write-Protect Control | Logic-high (VCC) disables writes to upper 256-byte block (100h–1FFh); logic-low (VSS) enables full-array access. |
| VCC | Power Supply | Primary supply input; powers EEPROM core, interface logic, and internal charge pump for write operations. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt Trigger Inputs | 5% VCC hysteresis (min) on SDA/SCL - rejects bus noise up to 50 ns spikes, ensuring robust I²C communication in electrically harsh environments. |
| Output Slope Control | Controlled rise/fall times (≤300 ns at 5V) - prevents ground bounce and EMI during signal transitions on shared PCB traces. |
| Hardware Write-Protect | Dedicated WP pin enabling selective lock of 100h–1FFh address range - eliminates software vulnerability in safety-critical configuration storage. |
| Page Write Capability | 16-byte buffer allows single I²C transaction to update up to 16 contiguous bytes - cuts bus overhead by ~94% vs. individual byte writes. |
| ESD Protection | >4,000V HBM - withstands handling and system-level ESD events without latch-up or parametric shift. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration register providing persistent state retention across power cycles and firmware updates. Use Value: Enables zero-downtime reconfiguration via field service tools using standard I²C commands, eliminating need for manual DIP-switch settings. |
Use Scenario: Holding factory-calibrated sensor offsets and gain coefficients in portable blood glucose meters and infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory segment for FDA-required traceability data with hardware write-lock on calibrated values. Use Value: Prevents accidental overwrites of certified calibration constants during routine diagnostics or firmware patches. |
| Automotive Body Control Module | Smart Energy Meter Firmware Settings |
Use Scenario: Saving user preferences (mirror position, seat memory, lighting profiles) and diagnostic trouble codes in AEC-Q100 qualified vehicle subsystems. IC Role / Device Role / Timing Role: Automotive-grade EEPROM supporting extended temperature range (–40°C to +125°C) and vibration resilience. Use Value: Meets AEC-Q100 Grade 1 requirements for automotive electronics, ensuring reliable operation under engine bay thermal stress. |
Use Scenario: Storing tariff schedules, demand-response thresholds, and metering calibration constants in ANSI C12.20-certified utility meters. IC Role / Device Role / Timing Role: High-endurance memory for infrequent but mission-critical parameter updates in sealed, maintenance-free deployments. Use Value: 1M-cycle endurance and 200-year data retention guarantee compliance with 20+ year utility infrastructure lifecycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA04H-I/ST | Lower VCC min (1.7V), same 400 kHz max clock, identical pinout and memory map - but lacks AEC-Q100 qualification. | Preferred for battery-powered portable devices requiring sub-2.5V operation; unsuitable for automotive use cases. | Select when system VCC may dip below 2.5V; verify I²C pull-up resistor value matches lower voltage. |
| AT24C04D-SSHM-T | Same 4-Kbit capacity, 1.7–5.5V VCC, 1 MHz clock support, and 16-byte page buffer - but uses different I²C address scheme (1010xxxR/W). | Enables higher-speed I²C communication in new designs; requires firmware address update due to differing device ID bits. | Choose for designs needing >400 kHz throughput; confirm host driver supports AT24C04D's address format and ACK polling behavior. |
Compared with 24LC04BH-I/ST, the 24AA04H-I/ST offers wider voltage flexibility but no automotive qualification, while the AT24C04D-SSHM-T delivers faster clock rates at the cost of firmware adaptation - making the 24LC04BH-I/ST optimal for industrial and automotive applications demanding proven 2.5V–5.5V stability and AEC-Q100 compliance.
Availability
24LC04BH-I/ST is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and automotive body electronics requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 24LC04BH-I/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 24LC04BH belongs to Microchip's serial EEPROM product line, engineered for reliable, low-power nonvolatile data storage in space- and power-constrained embedded systems across industrial, automotive, and medical markets.
FAQ
What is the minimum supply voltage required for reliable operation of the 24LC04BH-I/ST?
The 24LC04BH-I/ST requires a minimum VCC of 2.5V for guaranteed operation across its full industrial temperature range (–40°C to +85°C). Operation below 2.5V is not specified and may result in unreliable read/write functionality or increased error rates. This distinguishes it from the 24AA04H variant, which supports down to 1.7V.
How does the write-protect feature function on the 24LC04BH-I/ST?
On the 24LC04BH-I/ST, the WP pin controls hardware write protection: when tied to VCC, writes to memory addresses 100h–1FFh are inhibited while reads remain enabled; when tied to VSS, full-array read/write access is permitted. This provides physical security for critical calibration or configuration data without firmware intervention.
Can the 24LC04BH-I/ST be used in automotive applications?
Yes, the 24LC04BH-I/ST is AEC-Q100 qualified for automotive use and rated for extended temperature operation up to +125°C. Its qualification covers stress testing for temperature cycling, humidity, and mechanical shock - making it suitable for body control modules, infotainment systems, and other non-safety-critical automotive subsystems.
What is the maximum I²C clock frequency supported by the 24LC04BH-I/ST?
The 24LC04BH-I/ST supports a maximum I²C clock frequency of 400 kHz when VCC is between 2.5V and 5.5V. This is defined in the AC characteristics table and verified across the full industrial temperature range. Exceeding 400 kHz may cause timing violations and communication failures.
Does the 24LC04BH-I/ST require external pull-up resistors on the SDA and SCL lines?
Yes, the 24LC04BH-I/ST requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. For 400 kHz operation, a 2 kΩ pull-up to VCC is recommended; for 100 kHz, 10 kΩ is typical. Proper termination ensures valid logic levels and meets I²C bus timing specifications.
24LC04BH-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not 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:
- 8-TSSOP
24LC04BH-I/ST FAQ
1.How can I place an order for 24LC04BH-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC04BH-I/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 24LC04BH-I/ST reliable?
The price and inventory of 24LC04BH-I/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC04BH-I/ST is usually 5 days.
3.What payment methods are accepted for 24LC04BH-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC04BH-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC04BH-I/ST?
24LC04BH-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC04BH-I/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 24LC04BH-I/ST?
For technical support, including 24LC04BH-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC04BH-I/ST requirements.
6.How does Aetrix verify that 24LC04BH-I/ST is sourced from the original manufacturer or authorized distributors?
All 24LC04BH-I/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 24LC04BH-I/ST meets industry standards.
7.What is the process for return or replacement of 24LC04BH-I/ST?
All 24LC04BH-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC04BH-I/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 24LC04BH-I/ST part is unused and in its original packaging.
Return procedure for 24LC04BH-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC04BH-I/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
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…
