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Microchip Technology AT24HC04B-TH-T
- Part No.:
- AT24HC04B-TH-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT24HC04B-TH-T.pdf
- Description:
- IC EEPROM 4KBIT I2C 1MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:8,999
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Product details
Overview
AT24HC04B-TH-T from Microchip Technology is a 4-Kbit I²C-compatible serial EEPROM organized as 512 × 8, operating from 1.8V to 5.5V with industrial temperature range (−40°C to +85°C), 1 MHz Fast Mode Plus support at 4.5–5.5V, and hardware write-protection for upper-half memory array. It serves as nonvolatile configuration storage in embedded controllers, power management units, and sensor calibration modules.
For engineers reviewing the AT24HC04B-TH-T datasheet, AT24HC04B-TH-T pinout, AT24HC04B-TH-T application, or AT24HC04B-TH-T equivalent, key selection criteria include voltage compatibility (1.8–5.5V), I²C bus speed mode support (Standard/Fast/Fast Mode Plus), page write capability (16-byte), write endurance (1M cycles), and hardware WP pin functionality for partial-array protection.
Technical Context
The AT24HC04B-TH-T implements a two-wire I²C slave interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain SDA output requiring external pull-up. It supports cascaded addressing via A1/A2 pins, enabling up to four devices on one bus with device address prefix 1010b.
Internally, it features a 32-page × 16-byte memory architecture, self-timed write cycle ≤5 ms, and Power-on Reset (POR) with VPOR = 1.5 V and tPUP = 100 µs. Write protection is implemented via dedicated WP pin controlling upper 2K-bit half-array access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (512 × 8), sufficient for firmware flags, calibration coefficients, or device ID storage in space-constrained designs |
| Supply Voltage | 1.8 V to 5.5 V - enables direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifters |
| I²C Speed Modes | 100 kHz (Std), 400 kHz (Fast), 1 MHz (Fast Mode Plus @ 4.5–5.5V) - supports scalable timing across legacy and high-speed systems |
| Write Endurance | 1,000,000 cycles - ensures long-term reliability in frequently updated parameter storage applications |
| Data Retention | 100 years at 55°C - guarantees persistent storage integrity over product lifetime under industrial thermal stress |
| Active/Standby Current | ≤3 mA active (5V), ≤18 µA standby (5V) - minimizes power budget impact in battery-backed or energy-sensitive systems |
| Operating Temperature | −40°C to +85°C - qualified for deployment in automotive body control, industrial PLCs, and outdoor IoT nodes |
Pinout & Package
AT24HC04B-TH-T is supplied in an 8-lead TSSOP package (TH suffix), RoHS-compliant, with 0.65 mm lead pitch and exposed pad not connected. Pin functions are validated per Microchip DS20006150A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| NC | No Connect | Unbonded die pad; must be left floating or tied to GND - no electrical function |
| A1, A2 | Hardware Device Address Inputs | Set lower two bits of 7-bit I²C slave address (1010xxR/W); internally pulled down if unconnected |
| GND | Ground Reference | System return path for VCC and all I/O; requires low-impedance connection to minimize noise coupling |
| SDA | Serial Data Bidirectional Line | Open-drain I/O requiring external pull-up (≤10 kΩ); transmits/receives data and ACK/NACK bits |
| SCL | Serial Clock Input | Master-generated clock; rising edge latches input, falling edge clocks out data; requires pull-up |
| WP | Write-Protect Control | High = locks upper 2K-bit memory half; low = full write access; internally pulled down if floating |
| VCC | Power Supply Input | 1.8–5.5 V supply; must ramp monotonically at ≤0.1 V/µs; POR activates at ≥1.5 V |
Key Features
| Feature | Design Value |
|---|---|
| 16-byte Page Write Mode | Enables burst writes within single page boundary; reduces total write time vs. byte-by-byte for multi-byte updates |
| Schmitt Trigger + Noise Filtering | Rejects >40 ns spikes on SDA/SCL - improves robustness in electrically noisy environments (e.g., motor drives) |
| Hardware Write Protection | WP pin physically disables writes to upper 2K-bit memory segment - prevents accidental corruption of critical firmware data |
| Ultra-Low Standby Current | ≤18 µA at 5V - extends battery life in always-on backup power configurations (e.g., RTC + EEPROM combos) |
| Green Packaging | Lead-free, halide-free, RoHS-compliant TSSOP - meets global environmental compliance requirements without derating |
Applications
| Industrial Sensor Calibration | Embedded System Configuration |
|---|---|
|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog front-end sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during system boot or recalibration routines via I²C. Use Value: Enables field-replaceable sensor modules with unique calibration data retained across power cycles and firmware updates. |
Use Scenario: Holding user-defined settings (e.g., display brightness, network SSID, alarm thresholds) in smart home hubs. IC Role / Device Role / Timing Role: Persistent configuration register bank read/written by MCU during setup or runtime via standard I²C protocol. Use Value: Eliminates need for MCU internal flash wear leveling; supports 1M write cycles versus typical MCU flash endurance (~10k cycles). |
| Power Management Unit (PMU) | Automotive Body Control Module (BCM) |
|
Use Scenario: Recording fault logs and runtime statistics (e.g., overvoltage events, thermal shutdown count) in DC-DC converter controllers. IC Role / Device Role / Timing Role: Fault-data logger with WP-enabled protected sector for immutable event timestamps. Use Value: Provides traceable diagnostics without risking corruption during brown-out conditions due to hardware WP pin control. |
Use Scenario: Storing seat position memory, mirror presets, and door lock configuration in 12V automotive BCMs. IC Role / Device Role / Timing Role: Automotive-grade nonvolatile storage interfaced to 3.3V MCU over I²C with −40°C to +85°C operation. Use Value: Meets AEC-Q100 stress test requirements via industrial temp rating and 100-year data retention at 55°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95040-DRMN6TP/K | 4-Kbit SPI interface, 5V-only (4.5–5.5V), no WP pin, 5 ms write cycle | Requires SPI-capable MCU; lacks hardware write protection; unsuitable for I²C-bus systems | Select only when SPI interface is preferred and WP functionality is unnecessary |
| 24LC04B-I/P | Same 4-Kbit I²C EEPROM but in PDIP package, rated for −40°C to +85°C, max 400 kHz (no FM+) | Compatible pinout and protocol but limited to 400 kHz; less suitable for high-throughput logging | Valid drop-in alternative for cost-sensitive through-hole designs where 1 MHz speed is not required |
Compared with AT24HC04B-TH-T, M95040-DRMN6TP/K requires interface redesign and forfeits hardware write protection, while 24LC04B-I/P matches functionality but lacks Fast Mode Plus support and uses through-hole packaging - making AT24HC04B-TH-T optimal for surface-mount, high-speed, WP-critical applications.
Availability
AT24HC04B-TH-T is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded configuration storage, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AT24HC04B-TH-T 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 is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and memory solutions, with ISO 9001-certified quality systems and global distribution.
The AT24HC04B-TH-T belongs to Microchip's AT24HC family of I²C EEPROMs designed for low-voltage, low-power, and high-reliability nonvolatile storage in industrial, automotive, and consumer electronics.
FAQ
What is the maximum I²C clock frequency supported by the AT24HC04B-TH-T?
The AT24HC04B-TH-T supports 100 kHz (Standard Mode), 400 kHz (Fast Mode), and 1 MHz (Fast Mode Plus) - but FM+ operation is only guaranteed at VCC = 4.5 V to 5.5 V. Below 4.5 V, maximum speed reverts to 400 kHz. This allows designers to scale bus performance based on system voltage rail constraints without changing components.
Does the AT24HC04B-TH-T require external pull-up resistors on SDA and SCL lines?
Yes, the AT24HC04B-TH-T requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is a CMOS input. Microchip specifies maximum pull-up values of 10 kΩ for 100 kHz, 4 kΩ for 400 kHz, and 1.3 kΩ for 1 MHz operation - ensuring signal rise time compliance per I²C specification.
How does the Write-Protect (WP) pin function on the AT24HC04B-TH-T?
When WP is driven high (VCC), the AT24HC04B-TH-T inhibits writes to the upper half (2K-bit) of its memory array while allowing full access to the lower half. When WP is low (GND), all 4K-bit memory is writable. If left floating, WP defaults to GND via internal pull-down - but Microchip recommends hardwiring to avoid noise-induced misconfiguration.
What is the memory organization of the AT24HC04B-TH-T?
The AT24HC04B-TH-T organizes its 4,096 bits as 512 words × 8 bits, segmented into 32 pages of 16 bytes each. This structure enables efficient 16-byte page writes and supports both random and sequential read modes - optimizing data throughput for firmware parameter tables or sensor calibration maps stored contiguously.
Is the AT24HC04B-TH-T compatible with other AT24-series EEPROMs in terms of pinout and protocol?
Yes, the AT24HC04B-TH-T shares identical 8-pin TSSOP pinout and I²C protocol with AT24C04, AT24LC04B, and AT24MAC402 - including A1/A2 addressing, WP, SDA, SCL, VCC, and GND assignments. However, AT24HC04B-TH-T adds Fast Mode Plus support and tighter low-voltage AC specs, making it a functional and physical upgrade path.
AT24HC04B-TH-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 4Kbit
- Memory Organization:
- 512 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 550 ns
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
AT24HC04B-TH-T FAQ
1.How can I place an order for AT24HC04B-TH-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24HC04B-TH-T 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 AT24HC04B-TH-T reliable?
The price and inventory of AT24HC04B-TH-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24HC04B-TH-T is usually 5 days.
3.What payment methods are accepted for AT24HC04B-TH-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24HC04B-TH-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24HC04B-TH-T?
AT24HC04B-TH-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24HC04B-TH-T 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 AT24HC04B-TH-T?
For technical support, including AT24HC04B-TH-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24HC04B-TH-T requirements.
6.How does Aetrix verify that AT24HC04B-TH-T is sourced from the original manufacturer or authorized distributors?
All AT24HC04B-TH-T 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 AT24HC04B-TH-T meets industry standards.
7.What is the process for return or replacement of AT24HC04B-TH-T?
All AT24HC04B-TH-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24HC04B-TH-T, 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 AT24HC04B-TH-T part is unused and in its original packaging.
Return procedure for AT24HC04B-TH-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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