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Microchip Technology AT24HC04BN-SH-T
- Part No.:
- AT24HC04BN-SH-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24HC04BN-SH-T.pdf
- Description:
- IC EEPROM 4KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,914
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Product details
Overview
AT24HC04BN-SH-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 AT24HC04BN-SH-T datasheet, AT24HC04BN-SH-T pinout, AT24HC04BN-SH-T application, or AT24HC04BN-SH-T equivalent, key selection criteria include VCC voltage range compatibility, I²C bus speed mode support (Standard/Fast/Fast Mode Plus), page write capability (16-byte), WP pin functionality, and industrial-grade reliability metrics (1M write cycles, 100-year data retention).
Technical Context
The AT24HC04BN-SH-T implements a two-wire I²C slave interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain bidirectional data transfer. It uses internal high-voltage generation for EEPROM programming and features a hardware address comparator with A1/A2 pins enabling up to four devices on one bus.
Memory is organized into 32 pages of 16 bytes each, supporting byte and 16-byte page writes with self-timed write cycles ≤5 ms. Write protection is implemented via the WP pin, which disables writes to the upper 2K-bit half-array when driven high, while standby current remains ≤18 μA at 5.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (512 × 8), sufficient for firmware flags, calibration coefficients, and device ID storage in space-constrained designs. |
| VCC Range | 1.8V to 5.5V - enables direct interfacing with 1.8V, 2.5V, 3.3V, and 5V microcontrollers without level shifters. |
| I²C Speed Modes | 100 kHz (Std), 400 kHz (Fast), 1 MHz (Fast Mode Plus at 4.5–5.5V) - supports scalable throughput across legacy and modern controller platforms. |
| Write Cycle Time | ≤5 ms max - enables deterministic timing for firmware update sequences and avoids indefinite blocking during EEPROM commits. |
| Endurance / Retention | 1,000,000 write cycles / 100 years data retention - meets long-life requirements for industrial metering, medical diagnostics, and automotive subsystems. |
| WP Protection Scope | Hardware lock for upper 2K-bit half-array - allows safe storage of immutable factory settings while permitting runtime updates to user-configurable parameters. |
| Standby Current | ≤18 μA at 5.0V - minimizes quiescent power in battery-backed systems such as smart sensors and portable instrumentation. |
Pinout & Package
AT24HC04BN-SH-T is supplied in an 8-lead SOIC package (3.9mm × 4.9mm, 1.27mm pitch), RoHS-compliant and halide-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| NC | No Connect | Unused pin; must remain unconnected per Microchip specification - no routing or termination required. |
| A1 | Device Address Input | Hardwired to GND or VCC to configure 1 of 4 possible I²C slave addresses; internally pulled down if floating. |
| A2 | Device Address Input | Second hardware address bit; used with A1 to enable multi-device bus topology without software address conflict. |
| GND | Ground Reference | System ground return path for all internal circuitry; requires low-impedance connection to minimize noise coupling. |
| SDA | Serial Data Line | Open-drain bidirectional I²C data line; requires external pull-up resistor ≤10 kΩ and must be wire-ORed with other bus devices. |
| SCL | Serial Clock Line | Input-only clock line; must be pulled high externally; rising edge latches input, falling edge clocks out data. |
| WP | Write-Protect Control | Active-high hardware lock for upper 2K-bit memory block; driven to VCC to prevent accidental overwrites of critical calibration data. |
| VCC | Power Supply | Primary supply rail (1.8–5.5V); must ramp monotonically at ≤0.1 V/µs and stabilize ≥100 µs before first I²C command. |
Key Features
| Feature | Design Value |
|---|---|
| 16-byte Page Write | Enables efficient bulk parameter updates (e.g., sensor offset tables) with single-command atomicity and ≤5 ms commit time. |
| Schmitt Trigger Inputs | Suppresses bus noise and ensures robust I²C communication in electrically noisy environments like motor drives and power supplies. |
| Internal Pull-Down on A1/A2/WP | Eliminates need for external bias resistors in basic configurations, reducing BOM count and PCB area in cost-sensitive designs. |
| Fast Mode Plus Support | Delivers 1 Mbps throughput at 4.5–5.5V - cuts firmware update latency by 2.5× versus Standard Mode, critical for field-programmable devices. |
| Green Packaging | Lead-free, halide-free, RoHS-compliant SOIC - satisfies environmental compliance mandates for global industrial and consumer shipments. |
Applications
| Industrial Sensor Calibration | Smart Power Supply Configuration |
|---|---|
Use Scenario: Storing temperature-compensated gain/offset coefficients and sensor linearization tables in factory-calibrated pressure or humidity sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed 100-year data retention and 1M write endurance for periodic recalibration cycles. Use Value: Eliminates need for external calibration EEPROM or MCU flash wear-leveling logic, reducing firmware complexity and qualification effort. | Use Scenario: Holding output voltage/current setpoints, protection thresholds, and startup sequencing parameters in digitally controlled AC-DC and DC-DC modules. IC Role / Device Role / Timing Role: I²C-accessible parameter store synchronized with PMBus-compatible controllers for dynamic reconfiguration. Use Value: Enables field-upgradable power profiles without hardware changes, supporting multi-model production on shared PCBs. |
| Embedded Controller Bootloader Settings | Medical Diagnostic Device History Log |
Use Scenario: Persisting bootloader jump vectors, secure boot keys, and firmware version stamps in resource-constrained microcontroller-based systems. IC Role / Device Role / Timing Role: Secure, low-power configuration register bank accessible during cold start before main MCU initialization completes. Use Value: Provides tamper-resistant boot integrity checks and eliminates reliance on volatile RAM or unreliable flash sectors for critical startup data. | Use Scenario: Recording timestamped diagnostic events (e.g., error codes, sensor anomalies, battery health snapshots) in portable ultrasound or ECG monitors. IC Role / Device Role / Timing Role: Low-energy event logger using <18 μA standby current and 3 mA active write current to extend battery life between charges. Use Value: Supports >10,000 log entries with full traceability and zero risk of data loss during power interruption due to self-timed write completion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C04D-SSHM-T | Same 4-Kbit capacity, identical SOIC-8 package, but supports only up to 400 kHz I²C (no FM+), and lacks Fast Mode Plus timing spec at 1 MHz. | Not suitable where 1 MHz bus speed is required for high-throughput parameter loading; otherwise functionally interchangeable in legacy 100/400 kHz systems. | Select AT24C04D-SSHM-T only when FM+ capability is unnecessary and cost sensitivity outweighs future bus speed scalability. |
| M24C04-RMN6TP | 4-Kbit I²C EEPROM in SOIC-8, rated for −40°C to +105°C, with 1 MHz support at 2.5–5.5V (wider VCC low-end than AT24HC04BN-SH-T's 1.8V minimum). | Better suited for extended-temperature automotive cabin modules; lower 1.8V operation unavailable makes it incompatible with ultra-low-voltage IoT sensor nodes. | Choose M24C04-RMN6TP for under-hood or high-ambient applications requiring >85°C operation, but retain AT24HC04BN-SH-T for 1.8V–3.3V battery-powered designs. |
Compared with AT24HC04BN-SH-T, AT24C04D-SSHM-T sacrifices 1 MHz I²C capability for marginally lower cost in static systems, while M24C04-RMN6TP trades 1.8V operation for extended temperature range - making AT24HC04BN-SH-T the optimal balance of low-voltage flexibility, high-speed bus support, and industrial reliability.
Availability
AT24HC04BN-SH-T is available at Aetrix Electronics and suitable for industrial sensor calibration, smart power supply configuration, and embedded controller bootloader settings requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for AT24HC04BN-SH-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 infrastructure.
The AT24HC04BN-SH-T belongs to Microchip's AT24HC family of I²C EEPROMs designed specifically for low-voltage, high-reliability nonvolatile storage in industrial automation, medical equipment, and automotive subsystems.
FAQ
What is the maximum I²C clock frequency supported by the AT24HC04BN-SH-T?
The AT24HC04BN-SH-T supports 100 kHz (Standard Mode), 400 kHz (Fast Mode), and 1 MHz (Fast Mode Plus) I²C clock frequencies. Fast Mode Plus operation requires VCC between 4.5V and 5.5V; below 4.5V, maximum speed is 400 kHz. This enables flexible integration across legacy and high-performance controller platforms without protocol translation.
Does the AT24HC04BN-SH-T require external pull-up resistors on SDA and SCL lines?
Yes, the AT24HC04BN-SH-T requires external pull-up resistors on both SDA and SCL lines because SDA is open-drain and SCL is input-only. Microchip specifies maximum pull-up values of 10 kΩ for SDA and recommends ≤10 kΩ for SCL. Typical values used are 4.7 kΩ (400 kHz) or 1.3 kΩ (1 MHz) to meet rise-time requirements per I²C specification.
How does the Write-Protect (WP) pin function on the AT24HC04BN-SH-T?
When the WP pin of the AT24HC04BN-SH-T is driven high (to VCC), writes to the upper half (2K-bit) of the memory array are disabled, protecting factory calibration data or security keys. When WP is low (GND), full memory access is enabled. If left floating, WP is internally pulled down to GND - but Microchip recommends hardwiring it to avoid noise-induced protection errors.
What is the memory organization of the AT24HC04BN-SH-T?
The AT24HC04BN-SH-T organizes its 4,096 bits as 512 words of 8 bits each, structured in 32 pages of 16 bytes. This layout enables efficient 16-byte page writes and supports both random and sequential read modes. The device uses a 9-bit internal word address, with A8 transmitted in the device address byte and A7–A0 in the subsequent word address byte.
Is the AT24HC04BN-SH-T compatible with 1.8V microcontrollers?
Yes, the AT24HC04BN-SH-T operates across 1.8V to 5.5V, making it fully compatible with 1.8V microcontrollers. It supports I²C Standard and Fast Modes at 1.8V (100 kHz and 400 kHz respectively), with appropriate pull-up resistor sizing. Its input thresholds (VIL ≤ 0.3×VCC, VIH ≥ 0.7×VCC) ensure reliable logic-level recognition at 1.8V without level shifting.
AT24HC04BN-SH-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
AT24HC04BN-SH-T FAQ
1.How can I place an order for AT24HC04BN-SH-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24HC04BN-SH-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 AT24HC04BN-SH-T reliable?
The price and inventory of AT24HC04BN-SH-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24HC04BN-SH-T is usually 5 days.
3.What payment methods are accepted for AT24HC04BN-SH-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24HC04BN-SH-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24HC04BN-SH-T?
AT24HC04BN-SH-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24HC04BN-SH-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 AT24HC04BN-SH-T?
For technical support, including AT24HC04BN-SH-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24HC04BN-SH-T requirements.
6.How does Aetrix verify that AT24HC04BN-SH-T is sourced from the original manufacturer or authorized distributors?
All AT24HC04BN-SH-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 AT24HC04BN-SH-T meets industry standards.
7.What is the process for return or replacement of AT24HC04BN-SH-T?
All AT24HC04BN-SH-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24HC04BN-SH-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 AT24HC04BN-SH-T part is unused and in its original packaging.
Return procedure for AT24HC04BN-SH-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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