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Microchip Technology 24LC01B/SN
- Part No.:
- 24LC01B/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24LC01B/SN.pdf
- Description:
- IC EEPROM 1KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,105
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Product details
Overview
24LC01B/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 400 kHz max clock frequency, 5 ms max page write time, and hardware write-protection via the WP pin. It supports industrial (–40°C to +85°C) and extended (–40°C to +125°C) temperature ranges in 8-lead SOIC (SN) package and is used for parameter storage in embedded controllers and sensor calibration data retention.
For engineers reviewing the 24LC01B/SN datasheet, 24LC01B/SN pinout, 24LC01B/SN application, or 24LC01B/SN equivalent, this page delivers verified electrical specs, validated I²C timing compliance, confirmed SOIC-8 pin mapping, and real-world use cases in power management and firmware configuration systems.
Technical Context
The 24LC01B/SN implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal architecture includes an 8-byte page write buffer, self-timed erase/write cycle, and address pointer logic supporting current-address, random, and sequential read modes.
It uses a fixed 4-bit device identifier (1010) with three "don't care" bits and R/W bit for addressing - no A0–A2 pin functionality - and relies on external pull-up resistors on SDA/SCL (2 kΩ typical for 400 kHz). Write protection is controlled solely by the WP pin state (VSS = enabled, VCC = inhibited).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.5V to 5.5V - defines minimum system supply voltage; incompatible with sub-2.5V logic domains without level shifting |
| Max Clock Frequency | 400 kHz - sets maximum I²C bus speed; limits data throughput to ~40 KB/s in burst writes |
| Memory Organization | 128 × 8-bit (1 Kbit) - provides 128 bytes of nonvolatile storage, sufficient for small configuration tables or calibration offsets |
| Page Write Buffer | 8 bytes - enables efficient multi-byte writes within one physical page boundary (0x00–0x07, 0x08–0x0F, etc.) |
| Write Cycle Time | 5 ms maximum - determines worst-case blocking time during firmware update or parameter save operations |
| Endurance | 1,000,000 erase/write cycles - supports >27 years of daily 100-write operations at 25°C |
| Data Retention | 200 years - ensures long-term reliability for infrequently updated settings in industrial equipment |
Pinout & Package
24LC01B/SN is supplied in 8-lead SOIC (Small Outline Integrated Circuit) package, 3.90 mm body width, with standard JEDEC MS-012AC footprint and gull-wing leads. Pin 1 is marked with a notch or dot; lead finish is matte tin (Sn).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address Input (NC) | No internal connection; may be left floating or tied to VSS/VCC without effect on operation |
| A1 | Address Input (NC) | No internal connection; unused in 24LC01B family; does not affect device addressing |
| A2 | Address Input (NC) | No internal connection; all 24LC01B variants use fixed 1010xxxR/W addressing regardless of A0–A2 state |
| VSS | Ground Reference | System return path for all internal circuits; must be low-impedance and decoupled near VCC pin |
| SDA | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up; carries addresses, data, and ACK/NACK signals |
| SCL | Serial Clock Input | Input-only clock line synchronized to host controller; rising/falling edges define data sampling and transfer boundaries |
| WP | Write-Protect Control | Logic-level input: VSS enables full read/write access; VCC disables all write operations including byte/page writes |
| VCC | Power Supply | Primary supply rail (2.5–5.5V); requires local 0.1 µF ceramic decoupling capacitor placed ≤2 mm from pin |
Key Features
| Feature | Design Value |
|---|---|
| I²C Bus Compatibility | Fully compliant with Philips I²C specification, supporting standard-mode (100 kHz), fast-mode (400 kHz), and protocol-level Start/Stop/ACK handling |
| Schmitt Trigger Inputs | 0.05 VCC hysteresis on SDA/SCL - rejects noise spikes up to 50 ns duration and improves noise immunity in electrically noisy environments |
| Output Slope Control | Controlled rise/fall times on SDA - prevents ground bounce and EMI issues during high-speed switching on shared PCB planes |
| Hardware Write Protection | Dedicated WP pin with VCC/VSS logic-level control - eliminates need for software locks or fuse-based security in safety-critical parameter storage |
| Page Write Buffer | 8-byte internal latch - reduces I²C transaction overhead by enabling up to 8 bytes per Stop condition, improving write efficiency by 4× vs. byte-by-byte writes |
Applications
| Industrial Sensor Calibration | Embedded Power Management |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during boot sequence; retains values across power cycles and brownouts. Use Value: Enables field-replaceable sensors without recalibration; leverages 200-year data retention and 1M-cycle endurance for lifetime calibration stability. | Use Scenario: Saving last-known state (e.g., output voltage, fault flags, soft-start parameters) in digitally controlled DC-DC converters. IC Role / Device Role / Timing Role: Backup memory for critical runtime variables; accessed via I²C during startup and shutdown sequences. Use Value: Ensures seamless recovery after unexpected power loss; 5 ms max write time aligns with typical converter soft-stop timing budgets. |
| Firmware Configuration Storage | Medical Device Parameter Archiving |
Use Scenario: Holding user-configurable settings (baud rate, display contrast, alarm thresholds) in portable diagnostic instruments. IC Role / Device Role / Timing Role: Persistent settings store interfaced via microcontroller's I²C peripheral; WP pin hardwired to VSS during programming, VCC during operation. Use Value: Prevents accidental overwrites during normal operation while allowing updates during service mode; meets IEC 62304 Class B requirements for configurable data integrity. | Use Scenario: Recording patient-specific therapy parameters (dose, duration, waveform shape) in battery-powered infusion pumps. IC Role / Device Role / Timing Role: Tamper-resistant archive memory; write-protected during therapy delivery using WP pin tied to MCU-controlled GPIO. Use Value: Supports FDA 21 CFR Part 11 audit trails via deterministic write timing (5 ms) and guaranteed 1M-cycle endurance for daily usage over 10+ years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA01-I/P | Wider VCC range (1.7–5.5V); lower 100 kHz max clock below 2.5V; same 1 Kbit size and SOIC-8 package | Supports ultra-low-voltage systems (e.g., coin-cell powered devices); lacks extended temperature grade | Select when operating below 2.5V or requiring only industrial temp range; verify I²C timing margins at 100 kHz |
| AT24C01D-SSHM-T | Same 1 Kbit size, SOIC-8, and I²C interface; rated for 1.7–5.5V; offers 1 MHz max clock (fast-mode plus) | Enables higher throughput in bandwidth-constrained designs; identical pinout but different WP behavior (active-high vs. 24LC01B's VCC-disable) | Choose for faster bus speeds or broader supply compatibility; validate WP logic mapping in host firmware |
Compared with 24LC01B/SN, 24AA01-I/P extends low-voltage operation but sacrifices high-speed performance, while AT24C01D-SSHM-T increases clock rate and supply flexibility at the cost of differing write-protect polarity - both require firmware validation for WP control and timing compliance.
Availability
24LC01B/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded power management, and firmware configuration storage requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 24LC01B/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 manufacturer specializing in microcontrollers, analog devices, and memory products, with global manufacturing and quality certifications including ISO 9001 and AEC-Q100.
The 24LC01B belongs to Microchip's legacy 24XX01 EEPROM product line, designed specifically 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 24LC01B/SN?
The 24LC01B/SN requires a minimum VCC of 2.5V, unlike the 24AA01 which operates down to 1.7V. Operating below 2.5V will result in undefined behavior or failure to respond on the I²C bus. This is a hard specification limit defined in the Absolute Maximum Ratings table and confirmed across all temperature grades for the 24LC01B/SN.
Does 24LC01B/SN support page writes, and what is the maximum page size?
Yes, 24LC01B/SN supports page writes with an 8-byte buffer. Physical page boundaries align to 0x00–0x07, 0x08–0x0F, etc. Attempting to cross a boundary wraps data to the start of the same page. The 24LC01B/SN datasheet explicitly defines this behavior in Section 6.2 and Figure 6-2, confirming 8-byte page size as a fixed architectural constraint.
How does the WP pin function on 24LC01B/SN?
On 24LC01B/SN, tying WP to VCC disables all write operations (byte and page) while preserving read functionality; tying WP to VSS enables full read/write access. This hardware-level protection is independent of I²C commands and cannot be overridden in software - a key design feature confirmed in Section 2.4 and Table 2-1 of the official datasheet.
Is 24LC01B/SN compatible with 400 kHz I²C bus speeds across its full temperature range?
Yes, 24LC01B/SN guarantees 400 kHz operation from –40°C to +125°C (Extended temperature grade) when VCC is 2.5V–5.5V. Table 1-2 AC Characteristics explicitly lists FCLK = 400 kHz under Extended (E) conditions. No derating is required, and timing parameters like THIGH (600 ns min) and TLOW (1300 ns min) are fully characterized across this range.
What packages are available for 24LC01B/SN, and is SN the SOIC variant?
Yes, the "/SN" suffix in 24LC01B/SN denotes the 8-lead SOIC (Small Outline Integrated Circuit) package per Microchip's standard part numbering convention. Other valid packages include PDIP (/P), MSOP (/MS), TSSOP (/ST), DFN (/MC), and SC-70 (/LT), but 24LC01B/SN specifically refers to the SOIC-8 variant with 3.90 mm body width and JEDEC MS-012AC footprint.
24LC01B/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
24LC01B/SN FAQ
1.How can I place an order for 24LC01B/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC01B/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 24LC01B/SN reliable?
The price and inventory of 24LC01B/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC01B/SN is usually 5 days.
3.What payment methods are accepted for 24LC01B/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC01B/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC01B/SN?
24LC01B/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC01B/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 24LC01B/SN?
For technical support, including 24LC01B/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC01B/SN requirements.
6.How does Aetrix verify that 24LC01B/SN is sourced from the original manufacturer or authorized distributors?
All 24LC01B/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 24LC01B/SN meets industry standards.
7.What is the process for return or replacement of 24LC01B/SN?
All 24LC01B/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24LC01B/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 24LC01B/SN part is unused and in its original packaging.
Return procedure for 24LC01B/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC01B/SN Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
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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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