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Microchip Technology 24LC01BHT-I/SN
- Part No.:
- 24LC01BHT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24LC01BHT-I/SN.pdf
- Description:
- IC EEPROM 1KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,240
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Product details
Overview
24LC01BHT-I/SN from Microchip Technology Inc. is a 1 Kbit I²C-compatible serial EEPROM organized as 128 × 8-bit memory, operating from 2.5V to 5.5V with industrial temperature range (−40°C to +85°C), 400 kHz max clock frequency, and hardware write-protect for half-array (40h–7Fh). It supports page writes of up to 8 bytes and delivers >1 million erase/write cycles with >200 years data retention in embedded system configuration storage.
For engineers reviewing the 24LC01BHT-I/SN datasheet, 24LC01BHT-I/SN pinout, 24LC01BHT-I/SN application, or 24LC01BHT-I/SN equivalent, this device serves as a low-power, I²C-addressable nonvolatile memory for firmware parameter storage, calibration data logging, and secure boot configuration in space-constrained industrial controllers and automotive body electronics.
Technical Context
The 24LC01BHT-I/SN implements a slave-only I²C interface with fixed 7-bit address prefix '1010' and three don't-care bits, enabling single-device bus operation without address conflicts. Its internal address pointer auto-increments during sequential reads and wraps within 8-byte page boundaries during page writes.
Write protection is implemented via the WP pin: tied to VCC, it disables writes to addresses 40h–7Fh while permitting full read access; tied to VSS, full read/write functionality is enabled. Schmitt-trigger inputs on SDA and SCL plus input filtering suppress noise spikes up to 50 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8-bit), sufficient for storing bootloader flags, sensor calibration coefficients, or device ID strings |
| VCC operating range | 2.5V to 5.5V - compatible with 3.3V and 5V logic domains without level shifting |
| Max I²C clock | 400 kHz at VCC ≥ 2.5V - enables fast configuration updates without CPU overhead |
| Page write time | 3 ms typical - allows burst programming of up to 8 bytes per write cycle |
| Endurance | 1 million erase/write cycles - supports daily firmware update logging over 27+ years |
| Data retention | >200 years at +25°C - ensures long-term integrity of factory-programmed security keys |
| Standby current | 1 μA max at VCC = 5.5V - critical for battery-backed real-time clock modules and low-power sensors |
Pinout & Package
24LC01BHT-I/SN uses an 8-lead plastic SOIC package (3.90 mm body width) with gull-wing leads, RoHS-compliant matte tin plating, and JEDEC MS-012AC footprint. Pin 1 is A0 (no internal connection); pins 2–3 (A1, A2) are unconnected; pin 4 is VSS (ground); pin 5 is SDA (bidirectional open-drain I/O requiring external pull-up); pin 6 is SCL (clock input); pin 7 is WP (write-protect control); pin 8 is VCC (power supply).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | Unconnected address inputs | No internal bonding - may be left floating or tied to VSS/VCC without functional impact |
| VSS | Ground reference | Return path for all internal circuitry; must be low-impedance to minimize ground bounce during SDA transitions |
| SDA | Serial data I/O | Open-drain bidirectional line; requires 2 kΩ pull-up for 400 kHz operation to meet rise-time specs (≤300 ns) |
| SCL | Serial clock input | Master-generated synchronous timing signal; Schmitt-trigger input rejects noise <50 ns |
| WP | Write-protect control | Logic-high disables writes to upper half (40h–7Fh); enables field-safe firmware parameter locking |
| VCC | Power supply | Supplies internal charge pump for EEPROM programming; must remain stable ≥2.5V during write cycles |
Key Features
| Feature | Design Value |
|---|---|
| Half-array hardware write-protect | Enables permanent locking of critical configuration blocks (40h–7Fh) while allowing runtime updates to user parameters (00h–3Fh) |
| Schmitt-trigger SDA/SCL inputs | Provides 0.05×VCC hysteresis and 50 ns spike suppression - eliminates false start/stop detection on noisy automotive CAN bus PCBs |
| Page write capability (8 bytes) | Reduces I²C transaction count by 8× vs. byte writes - cuts firmware update time from 24 ms to 3 ms for full 64-byte calibration table |
| VCC threshold detector | Disables erase/write logic below 1.5V - prevents partial writes and data corruption during brown-out conditions |
| ESD protection | ≥4 kV HBM on all pins - meets IEC 61000-4-2 Level 3 for industrial control panel integration |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module |
|---|---|
|
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and fault log history in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed via I²C during power-up and runtime reconfiguration. Use Value: Enables field-upgradable control logic without firmware reflashing; 1 μA standby current extends backup battery life to >5 years. |
Use Scenario: Retaining seat position memory, mirror angle presets, and door lock status across ignition cycles. IC Role / Device Role / Timing Role: Slave EEPROM responding to MCU-initiated I²C reads/writes during vehicle power-on sequence. Use Value: Hardware write-protect (WP=VCC) locks factory calibration data while permitting user-defined settings updates. |
| Medical Sensor Calibration | Smart Energy Meter Firmware Flags |
|
Use Scenario: Storing temperature-compensated gain/offset coefficients for analog front-end sensors in portable diagnostics devices. IC Role / Device Role / Timing Role: I²C-configurable memory holding per-unit calibration constants loaded at manufacturing test. Use Value: >200-year data retention guarantees accuracy traceability over product lifetime; 1M endurance supports recalibration every 3 months for 27+ years. |
Use Scenario: Recording firmware version, tamper-detection flags, and tariff schedule activation timestamps in utility-grade meters. IC Role / Device Role / Timing Role: Secure nonvolatile storage accessed only by trusted MCU during boot and metering events. Use Value: Half-array write-protect isolates immutable security keys (40h–7Fh) from field-updatable billing parameters (00h–3Fh). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA01HT-I/SN | Lower VCC min (1.7V), same pinout and memory map; lacks automotive temp grade option | Better suited for battery-powered IoT nodes with 1.8V supply rails; not qualified for automotive E-temp | Select when operating below 2.5V or requiring extended low-voltage functionality |
| AT24C01D-SSHM-T | Same 1 Kbit size, 1.7–5.5V range, and 400 kHz speed; different I²C address (1010000b vs. 1010xxxb) | Requires address conflict resolution in multi-device I²C systems; identical endurance and retention specs | Choose when consolidating BOMs with other Atmel/Microchip AT24C-series devices |
Compared with 24LC01BHT-I/SN, the 24AA01HT-I/SN offers wider voltage flexibility but no automotive qualification, while the AT24C01D-SSHM-T provides identical performance with distinct addressing-making both viable alternatives where voltage range or supply chain diversity drives selection.
Availability
24LC01BHT-I/SN is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and medical device calibration requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for 24LC01BHT-I/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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24LC01BHT-I/SN belongs to Microchip's legacy I²C serial EEPROM product line, engineered for reliable nonvolatile data storage in cost-sensitive, space-constrained embedded systems with stringent industrial and automotive environmental requirements.
FAQ
What is the minimum VCC required for reliable operation of the 24LC01BHT-I/SN?
The 24LC01BHT-I/SN requires a minimum VCC of 2.5V for full specification compliance, including 400 kHz I²C operation and guaranteed write functionality. Operation below 2.5V is not supported - unlike the 24AA01H variant, which operates down to 1.7V. The internal charge pump and EEPROM programming circuitry are designed exclusively for 2.5V–5.5V operation, and attempting use below 2.5V risks incomplete writes or data corruption. Always verify VCC stability during power-up sequences before initiating any 24LC01BHT-I/SN write command.
How does the hardware write-protect feature function on the 24LC01BHT-I/SN?
The WP pin on the 24LC01BHT-I/SN controls hardware write-protection: when tied to VCC, writes to memory addresses 40h–7Fh are inhibited while reads remain fully functional; when tied to VSS, full read/write access to the entire 128-byte array is enabled. This is implemented entirely in silicon - no software registers or commands are involved. The protection state is sampled at the start of each write cycle, so changing WP during an active write has no effect. This feature allows safe field updates to user-configurable regions (00h–3Fh) while preserving factory-set calibration or security data in the protected half.
Can the 24LC01BHT-I/SN perform page writes across memory boundaries?
No, the 24LC01BHT-I/SN cannot perform page writes across physical page boundaries. Its internal page buffer is 8 bytes wide, and page writes wrap within the current page - meaning if a write starts at address 7Eh and attempts to write 4 bytes, the fourth byte overwrites address 7Eh instead of advancing to 80h. Physical pages begin at addresses divisible by 8 (00h, 08h, 10h, ..., 78h). To avoid unintended data loss, firmware must validate that all bytes in a page write fall within the same 8-byte boundary before issuing the command. The 24LC01BHT-I/SN does not generate an error or flag this condition - it silently wraps.
What is the maximum I²C clock frequency supported by the 24LC01BHT-I/SN under industrial temperature conditions?
The 24LC01BHT-I/SN supports a maximum I²C clock frequency of 400 kHz across its full industrial temperature range (−40°C to +85°C) when VCC is 2.5V or higher. At VCC < 2.5V, the maximum clock drops to 100 kHz - but since the 24LC01BHT-I/SN is not rated for operation below 2.5V, 400 kHz is its guaranteed maximum. This speed enables complete 128-byte memory reads in under 3.5 ms (including ACK overhead), making it suitable for time-critical configuration loading in real-time control loops. AC timing parameters like THIGH (600 ns min) and TLOW (1300 ns min) are fully characterized at this rate.
Does the 24LC01BHT-I/SN require external pull-up resistors on SDA and SCL lines?
Yes, the 24LC01BHT-I/SN requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. For 400 kHz operation, Microchip specifies a 2 kΩ pull-up to VCC; for 100 kHz, 10 kΩ is acceptable. These values ensure SDA/SCL rise times stay within the 300 ns maximum (at VCC ≥ 2.5V) required by the I²C Fast-mode specification. Without proper pull-ups, the bus will fail to release high, causing communication stalls, missing ACKs, or spurious Start/Stop conditions. The 24LC01BHT-I/SN itself does not provide internal pull-ups - they must be added externally per I²C bus design rules.
24LC01BHT-I/SN 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:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Kbit
- Memory Organization:
- 128 x 8
- 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-SOIC
24LC01BHT-I/SN FAQ
1.How can I place an order for 24LC01BHT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC01BHT-I/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 24LC01BHT-I/SN reliable?
The price and inventory of 24LC01BHT-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC01BHT-I/SN is usually 5 days.
3.What payment methods are accepted for 24LC01BHT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC01BHT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC01BHT-I/SN?
24LC01BHT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC01BHT-I/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 24LC01BHT-I/SN?
For technical support, including 24LC01BHT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC01BHT-I/SN requirements.
6.How does Aetrix verify that 24LC01BHT-I/SN is sourced from the original manufacturer or authorized distributors?
All 24LC01BHT-I/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 24LC01BHT-I/SN meets industry standards.
7.What is the process for return or replacement of 24LC01BHT-I/SN?
All 24LC01BHT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24LC01BHT-I/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 24LC01BHT-I/SN part is unused and in its original packaging.
Return procedure for 24LC01BHT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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