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Microchip Technology 24LC16B-M/SN
- Part No.:
- 24LC16B-M/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24LC16B-M/SN.pdf
- Description:
- IC EEPROM 16KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:400
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Product details
Overview
24LC16B-M/SN from Microchip Technology Inc. is a 16 Kbit I²C-compatible serial EEPROM organized as eight 256 × 8-bit blocks, operating from 2.5V to 5.5V with extended temperature range (–55°C to +125°C), 400 kHz max clock frequency, and hardware write-protection via WP pin. It is used for nonvolatile parameter storage in industrial sensors and automotive control modules requiring high-temperature reliability.
For engineers reviewing the 24LC16B-M/SN datasheet, 24LC16B-M/SN pinout, 24LC16B-M/SN application, or 24LC16B-M/SN equivalent, key selection considerations include its SOIC-8 package, page-write capability (16-byte buffer), self-timed erase/write cycle (≤5 ms), Schmitt-trigger inputs for noise immunity, and extended-temperature qualification per MIL-PRF-38535 Class H equivalent stress levels.
Technical Context
The 24LC16B-M/SN implements a slave-only I²C interface with fixed 7-bit device address prefix '1010' and three block-select bits (B2–B0), enabling access to eight independent 256-word memory blocks. Its internal address pointer auto-increments during sequential reads and supports current-address, random, and sequential read modes.
It uses open-drain SDA/SCL with external pull-ups, incorporates VCC threshold detection (<1.5V disable), Schmitt-trigger inputs with ≥0.05 VCC hysteresis, and output slope control to suppress ground bounce. Write protection is implemented via dedicated WP pin tied to VCC (full-array lock) or VSS (enabled).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 bytes), organized as eight 256 × 8-bit blocks - enables modular firmware parameter partitioning |
| Supply Voltage | 2.5V to 5.5V - supports direct interfacing with 3.3V and 5V microcontrollers without level-shifting |
| Max Clock Frequency | 400 kHz - compatible with standard and fast-mode I²C buses; requires ≤300 ns rise/fall times on SDA/SCL |
| Page Write Buffer | 16 bytes - reduces write transaction overhead; crossing physical page boundaries causes wraparound, not overflow |
| Write Cycle Time | ≤5 ms (self-timed) - eliminates need for external delay timing; ACK polling required to detect completion |
| Endurance & Retention | 1 million erase/write cycles; >200 years data retention at +125°C - validated for long-life embedded deployments |
| Operating Temperature | –55°C to +125°C (Extended, M grade) - qualified for under-hood automotive, downhole, and military-grade applications |
Pinout & Package
24LC16B-M/SN is supplied in an 8-pin Plastic SOIC (3.90 mm body, SN suffix) package with gull-wing leads. Pin 1 is marked by a beveled corner or notch; A0–A2 pins are unconnected internally and may be left floating or tied to VSS/VCC without effect.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A0) | Not connected | No internal bond; no electrical function - may be omitted from PCB layout or tied arbitrarily |
| 2 (A1) | Not connected | No internal bond; no electrical function - does not affect device addressing or operation |
| 3 (A2) | Not connected | No internal bond; device uses fixed '1010' base address - A0–A2 ignored in all configurations |
| 4 (VSS) | Ground reference | Primary return path for all internal logic and I/O; must be low-impedance connection to system GND plane |
| 5 (SDA) | Serial data I/O | Open-drain bidirectional bus line; requires external pull-up (2 kΩ for 400 kHz); changes only during SCL low |
| 6 (SCL) | Serial clock input | Master-generated clock; Schmitt-trigger input with hysteresis ensures noise immunity on noisy boards |
| 7 (WP) | Hardware write-protect | Active-high lock: tie to VCC to inhibit all writes (read-only mode); tie to VSS for full read/write access |
| 8 (VCC) | Power supply | 2.5V–5.5V tolerant; includes internal VCC monitor that disables write logic below ~1.5V to prevent corruption |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | ≥0.05 VCC hysteresis on SDA/SCL - rejects EMI spikes up to 50 ns duration without external filtering |
| Output slope control | Controlled SDA fall time (20+0.1CB ns) - prevents ground bounce-induced glitches during high-speed switching |
| Page write buffer | 16-byte on-chip buffer - enables single-stop multi-byte writes, reducing I²C bus occupancy by up to 8× vs byte-write |
| Hardware write-protect | Dedicated WP pin with VCC/VSS logic-level sensitivity - provides tamper-resistant configuration locking without software overhead |
| Extended temperature support | –55°C to +125°C operation with full DC/AC specs guaranteed - eliminates derating for harsh-environment designs |
Applications
| Industrial Sensor Calibration | Automotive Engine Control Unit |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients and real-time calibration updates in pressure/temperature transducers deployed in oil & gas wellheads. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with write-protection enabled during field operation to prevent accidental corruption. Use Value: Enables field recalibration without reprogramming MCU firmware; 1M endurance supports >10 years of daily updates at 200°C-equivalent retention. |
Use Scenario: Holding adaptive fuel trim tables and fault-code history logs in engine control modules exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: Secondary parameter store synchronized with main MCU via I²C; WP pin tied to ignition-switched rail for runtime write-lock. Use Value: Survives repeated thermal shock (-40°C to +125°C) without data loss; 5 ms write time allows logging within 10 ms engine control loops. |
| Military Radio Firmware Settings | Medical Infusion Pump Configuration |
Use Scenario: Retaining secure communication keys, channel presets, and user preferences in handheld tactical radios operating in extreme cold environments. IC Role / Device Role / Timing Role: Tamper-resistant settings vault; WP pin hardwired to VCC during power-up to enforce read-only policy post-deployment. Use Value: Meets MIL-STD-810G thermal shock requirements; >200-year data retention ensures mission-critical settings persist across equipment lifecycles. |
Use Scenario: Storing drug library parameters, dosage limits, and operator audit trails in battery-powered infusion pumps requiring FDA 21 CFR Part 11 compliance. IC Role / Device Role / Timing Role: Secure, low-power configuration memory; operates at 2.5V to extend battery life while maintaining full I²C throughput. Use Value: 1 µA standby current minimizes quiescent drain; RoHS-compliant lead finish meets medical device material restrictions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C16C-MAHM-T | Same 16 Kbit capacity, 2.5V–5.5V, but rated –40°C to +125°C (not –55°C); 1 MHz max clock; different WP behavior (active-low) | Lacks full military-grade cold-start capability; higher speed useful only if master supports 1 MHz I²C | Select only if –55°C operation is unnecessary and faster clock tolerance is required |
| BR24G16FJ-WE2 | 16 Kbit, 1.7V–5.5V, –40°C to +105°C; built-in write-cycle suspend; no dedicated WP pin (software-controlled lock) | Lower VCC min enables single-cell Li-ion use; lacks hardware write-lock for safety-critical lockout | Prefer for ultra-low-voltage portable devices where hardware WP is not mandated by safety standards |
Compared with AT24C16C-MAHM-T and BR24G16FJ-WE2, the 24LC16B-M/SN uniquely delivers true –55°C startup, fixed hardware WP, and guaranteed 400 kHz AC timing across the full extended temperature range - making it the only choice for aerospace-grade and downhole instrumentation where cold-margin and deterministic lockout are mandatory.
Availability
24LC16B-M/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive engine control units, and military radio firmware settings requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 24LC16B-M/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 nonvolatile memory solutions, with ISO/TS-16949:2009 certification across wafer fabrication and assembly sites.
The 24LC16B belongs to Microchip's legacy I²C EEPROM product line, designed specifically for robust, low-power, extended-temperature nonvolatile storage in safety-critical and mission-critical embedded systems.
FAQ
What is the maximum I²C clock frequency supported by the 24LC16B-M/SN?
The 24LC16B-M/SN supports up to 400 kHz clock frequency across its full extended temperature range (–55°C to +125°C). This is specified in Table 1-2 of the DS20002213B datasheet under "FCLK" with a maximum value of 400 kHz. Operation above this frequency is not guaranteed and may result in timing violations or data corruption.
Does the 24LC16B-M/SN require external pull-up resistors on SDA and SCL lines?
Yes, the 24LC16B-M/SN requires external pull-up resistors on both SDA and SCL because these pins are open-drain outputs. The datasheet recommends 10 kΩ for 100 kHz operation and 2 kΩ for 400 kHz operation. Without proper pull-ups, the bus will fail to transition high, preventing reliable I²C communication.
Can the A0, A1, and A2 pins of the 24LC16B-M/SN be left unconnected?
Yes, the A0, A1, and A2 pins of the 24LC16B-M/SN are not internally connected and serve no functional purpose. They may be left floating, tied to VSS, or tied to VCC without affecting device operation or addressing - as explicitly stated in Table 2-1 and Section 2.4 of the DS20002213B datasheet.
How does hardware write-protection work on the 24LC16B-M/SN?
Hardware write-protection on the 24LC16B-M/SN is controlled by the WP pin: when tied to VCC, all write operations (byte and page) are inhibited while read operations remain fully functional; when tied to VSS, full read/write access is enabled. This is a hardwired logic-level function with no software dependency.
What is the page write buffer size of the 24LC16B-M/SN, and what happens if more than 16 bytes are sent?
The 24LC16B-M/SN has a 16-byte page write buffer. If more than 16 bytes are transmitted before the Stop condition, the address counter wraps around within the same physical page, overwriting previously loaded data - not advancing to the next page. This behavior is documented in Section 6.2 and Figure 6-2 of the DS20002213B datasheet.
24LC16B-M/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:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 16Kbit
- Memory Organization:
- 2K 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:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24LC16B-M/SN FAQ
1.How can I place an order for 24LC16B-M/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC16B-M/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 24LC16B-M/SN reliable?
The price and inventory of 24LC16B-M/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC16B-M/SN is usually 5 days.
3.What payment methods are accepted for 24LC16B-M/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC16B-M/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC16B-M/SN?
24LC16B-M/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC16B-M/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 24LC16B-M/SN?
For technical support, including 24LC16B-M/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC16B-M/SN requirements.
6.How does Aetrix verify that 24LC16B-M/SN is sourced from the original manufacturer or authorized distributors?
All 24LC16B-M/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 24LC16B-M/SN meets industry standards.
7.What is the process for return or replacement of 24LC16B-M/SN?
All 24LC16B-M/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24LC16B-M/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 24LC16B-M/SN part is unused and in its original packaging.
Return procedure for 24LC16B-M/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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