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Microchip Technology 24LC01BT/SN
- Part No.:
- 24LC01BT/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24LC01BT/SN.pdf
- Description:
- IC EEPROM 1KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:13,051
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Product details
Overview
24LC01BT/SN from Microchip Technology Inc. is a 1 Kbit I²C-compatible serial EEPROM organized as 128 × 8-bit memory with hardware write-protection, 8-byte page write buffer, and operation down to 2.5V. It supports 400 kHz clock frequency, delivers ≤1 mA active current and ≤1 µA standby current (I-temp), and targets nonvolatile data storage in space-constrained embedded systems.
For engineers reviewing the 24LC01BT/SN datasheet, 24LC01BT/SN pinout, 24LC01BT/SN application, or 24LC01BT/SN equivalent, this page provides verified electrical specs, SOIC-8 package details, I²C timing constraints, write-protection behavior, and validated alternative parts for industrial temperature-grade EEPROM replacement.
Technical Context
The 24LC01BT/SN implements a 2-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal address pointer enables current-address, random, and sequential read modes, while the 8-byte page buffer supports efficient multi-byte writes within a single physical page boundary (00–7F).
Write protection is implemented via the dedicated WP pin: tied to VSS for full read/write access, tied to VCC to inhibit all write operations across the entire 128-byte array. The device uses self-timed erase/write cycles with 5 ms maximum page write time and supports acknowledge polling to detect write completion without fixed delays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8-bit) - fits small configuration data, calibration constants, or device ID storage in resource-limited systems. |
| VCC Range | 2.5V to 5.5V - compatible with 3.3V and 5V logic domains; not operable below 2.5V unlike 24AA01/24FC01 variants. |
| Max Clock Frequency | 400 kHz - supports standard-mode I²C; no high-speed (1 MHz) capability per datasheet Table 1-2. |
| Page Write Buffer | 8 bytes - enables burst writes up to 8 bytes per Stop condition; crossing page boundaries causes wraparound, requiring software management. |
| Write Cycle Time | ≤5 ms (max) - defines minimum inter-write interval; actual duration varies with VCC and temperature but never exceeds this limit. |
| Endurance & Retention | 1 million erase/write cycles, >200 years data retention - suitable for infrequent updates in long-life industrial deployments. |
| Temp Range | Industrial (-40°C to +85°C) - qualified for extended ambient operation in control panels, sensors, and power supplies. |
Pinout & Package
24LC01BT/SN is supplied in an 8-lead SOIC (Small Outline Integrated Circuit) package, designated by suffix "SN" per Microchip's packaging table. Pin 1 is A0 (not connected), pin 4 is VSS (ground), pin 5 is SDA (bidirectional open-drain data line), pin 6 is SCL (input clock), pin 7 is WP (write-protect input), and pin 8 is VCC (power supply). A0, A1, and A2 are NC and may be left floating or tied to VSS/VCC without effect.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address Input (NC) | No internal connection; unused for addressing - simplifies PCB layout and eliminates need for pull-up/down resistors. |
| A1 | Address Input (NC) | No internal connection; identical to A0 - allows direct substitution of 24LC01B variants without address pin rework. |
| A2 | Address Input (NC) | No internal connection; confirms fixed I²C client address '1010xxx0' - eliminates address conflict risk in multi-device buses. |
| VSS | Ground Reference | Return path for all internal circuitry; must be low-impedance to ensure stable I²C signal integrity and noise immunity. |
| SDA | Bidirectional Data Line | Open-drain I²C bus line requiring external pull-up (2–10 kΩ); changes only during SCL low to avoid false Start/Stop generation. |
| SCL | Clock Input | Master-generated synchronous clock; rising edge samples data, falling edge allows data change - defines timing window for valid data setup/hold. |
| WP | Write-Protect Control | Logic-high = full array write-inhibited; logic-low = normal read/write - enables field-safe firmware updates or factory calibration lock. |
| VCC | Power Supply | 2.5–5.5V supply; powers EEPROM core and I/O buffers; decoupling capacitor (0.1 µF) required near pin for transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Write-Protection | WP pin disables all write operations when pulled high - prevents accidental overwrites during power transitions or firmware glitches. |
| Schmitt Trigger Inputs | Input hysteresis ≥0.05×VCC on SDA/SCL - rejects sub-50 ns noise spikes and ensures robust operation in electrically noisy environments (e.g., motor drives). |
| Page Write Buffer | 8-byte internal latch - reduces I²C transaction count by up to 8× versus byte-write mode, improving bus efficiency in configuration storage. |
| Low-Power Operation | 1 µA max standby current at -40°C to +85°C - extends battery life in always-on sensor nodes or backup power circuits. |
| I²C Compatibility | Fully compliant with Philips I²C-bus specification (100/400 kHz modes) - interoperable with standard microcontroller peripherals without protocol translation. |
Applications
| Smart Meter Calibration Storage | Industrial PLC Configuration Memory |
|---|---|
Use Scenario: Storing meter-specific calibration coefficients and tariff tables that must survive power loss and remain unaltered during field operation. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed via I²C during boot or maintenance mode; WP pin held high after initial programming. Use Value: Prevents unauthorized or accidental modification of revenue-critical parameters using hardware-level write protection, eliminating need for software locks. | Use Scenario: Holding user-defined I/O mapping, scan cycle timing, and alarm thresholds in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Persistent parameter store updated infrequently via HMI or engineering station; accessed at system startup and during runtime diagnostics. Use Value: Enables field reconfiguration without firmware reload; 1M endurance supports decades of maintenance cycles in 24/7 operation. |
| Medical Device Serial Number Log | Automotive Body Control Module Settings |
Use Scenario: Recording unique device identifiers, manufacturing date, and service history in portable diagnostic equipment subject to regulatory traceability requirements. IC Role / Device Role / Timing Role: Secure audit log storage with write-once initialization and subsequent read-only access; WP tied to VCC post-programming. Use Value: Meets FDA 21 CFR Part 11 data integrity mandates through hardware-enforced immutability after commissioning. | Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in automotive BCMs where settings persist across ignition cycles. IC Role / Device Role / Timing Role: Low-power EEPROM interfaced to 3.3V MCU I²C peripheral; accessed during vehicle power-up and user adjustment events. Use Value: 2.5V minimum VCC ensures reliable operation during cold-crank battery dips; 8-byte page writes minimize bus occupancy during profile saves. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA01T/SN | Wider VCC range (1.7–5.5V); supports 100 kHz at 1.7–2.5V; same 1 Kbit size, SOIC-8, and pinout. | Enables operation in ultra-low-voltage systems (e.g., coin-cell powered IoT sensors) where 24LC01BT/SN cannot function below 2.5V. | Select 24AA01T/SN when design requires <2.5V operation; otherwise 24LC01BT/SN offers better noise immunity at higher VCC due to tighter AC specs. |
| AT24C01D-SSHM-T | Same 1 Kbit, SOIC-8, I²C interface; rated for -40°C to +85°C; 1 MHz max clock; 1.7–5.5V VCC; 1M endurance. | Offers higher speed (1 MHz) and lower voltage flexibility, but lacks explicit automotive qualification and has different WP behavior (active-high vs. 24LC01B's VCC-tied inhibition). | Choose AT24C01D-SSHM-T for designs needing faster writes or broader voltage headroom; verify WP logic compatibility in existing firmware. |
Compared with 24LC01BT/SN, 24AA01T/SN extends low-voltage usability while maintaining identical footprint and software interface, whereas AT24C01D-SSHM-T trades guaranteed automotive qualification for higher speed and wider VCC range - both require validation of WP pin handling and timing margins in target systems.
Availability
24LC01BT/SN is available at Aetrix Electronics and suitable for industrial control systems, smart energy meters, medical diagnostics equipment, and automotive body electronics requiring stable component supply and long-term lifecycle support.
Supply support for 24LC01BT/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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory products, with global manufacturing and quality certifications including ISO 9001 and AEC-Q200.
The 24LC01B family is designed for cost-sensitive, space-constrained embedded systems requiring reliable nonvolatile storage with minimal external components and robust I²C interoperability.
FAQ
What is the minimum operating voltage for the 24LC01BT/SN?
The 24LC01BT/SN requires a minimum VCC of 2.5V, as specified in the Device Selection Table and Electrical Characteristics section. Unlike the 24AA01 variant, it does not support operation below 2.5V - attempting to power it at 1.8V or 2.2V will result in undefined behavior or failure to respond on the I²C bus. This limitation is inherent to the 24LC01B silicon process and is confirmed across all temperature grades for this part number.
Does the 24LC01BT/SN support 1 MHz I²C communication?
No, the 24LC01BT/SN supports a maximum clock frequency of 400 kHz under all valid VCC conditions (2.5V–5.5V). The 1 MHz capability is exclusive to the 24FC01 variant, as clearly differentiated in the Device Selection Table and AC Characteristics section. Using 24LC01BT/SN at 1 MHz violates its AC timing specifications and may cause data corruption or bus lockup.
How does the WP pin function on the 24LC01BT/SN?
On the 24LC01BT/SN, the WP pin is a digital input that enables hardware write protection: when tied to VCC, the entire 128-byte memory array (addresses 00–7F) becomes read-only; when tied to VSS, full read/write access is restored. This behavior is explicitly defined in Section 2.4 and Figure 6-1 of the datasheet, and differs from some competitors' EEPROMs that use active-low or register-based protection schemes.
What package type does the suffix "SN" indicate for the 24LC01BT/SN?
The "SN" suffix in 24LC01BT/SN denotes the 8-lead SOIC (Small Outline Integrated Circuit) package, as confirmed in the Device Selection Table and Packaging Information section. This is a standard 3.9 mm wide surface-mount package with 1.27 mm pitch, widely supported by pick-and-place equipment and PCB assembly processes. It is distinct from PDIP ("P"), MSOP ("MS"), or TSSOP ("ST") variants also offered in the 24LC01B family.
Can the 24LC01BT/SN be used interchangeably with the 24LC01B-I/SN?
Yes, 24LC01BT/SN and 24LC01B-I/SN refer to the same device: the "T" indicates tape-and-reel packaging, while "I" denotes Industrial temperature grade (-40°C to +85°C), which is the default grade for the SN package. Microchip's marking conventions and packaging table confirm that "24LC01B" without explicit grade suffix defaults to Industrial, and "T" is a packaging indicator - not a functional variant. Both part numbers share identical electrical, timing, and reliability specifications.
24LC01BT/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:
- 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:
- 3.5 µs
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24LC01BT/SN FAQ
1.How can I place an order for 24LC01BT/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC01BT/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 24LC01BT/SN reliable?
The price and inventory of 24LC01BT/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC01BT/SN is usually 5 days.
3.What payment methods are accepted for 24LC01BT/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC01BT/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC01BT/SN?
24LC01BT/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC01BT/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 24LC01BT/SN?
For technical support, including 24LC01BT/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC01BT/SN requirements.
6.How does Aetrix verify that 24LC01BT/SN is sourced from the original manufacturer or authorized distributors?
All 24LC01BT/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 24LC01BT/SN meets industry standards.
7.What is the process for return or replacement of 24LC01BT/SN?
All 24LC01BT/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24LC01BT/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 24LC01BT/SN part is unused and in its original packaging.
Return procedure for 24LC01BT/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC01BT/SN 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
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