My Inquiry
My Account
Microchip Technology 24LC16B-I/ST
- Part No.:
- 24LC16B-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC16B-I/ST.pdf
- Description:
- IC EEPROM 16KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:876
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
24LC16B-I/ST from Microchip Technology Inc. is a 16-Kbit I²C-compatible serial EEPROM organized as eight 256 × 8-bit memory blocks. It operates from 2.5V to 5.5V, supports up to 400 kHz clock frequency, features hardware write-protection via the WP pin, and delivers ≤1 μA standby current at industrial temperature (–40°C to +85°C). It is commonly used for configuration storage in embedded controllers and sensor calibration data retention.
For engineers reviewing the 24LC16B-I/ST datasheet, 24LC16B-I/ST pinout, 24LC16B-I/ST application, or 24LC16B-I/ST equivalent, this page provides verified electrical specifications, SOIC-8 package details, I²C timing constraints, endurance (1M cycles), and real-world use cases in industrial control and automotive subsystems.
Technical Context
The 24LC16B-I/ST implements a two-wire I²C slave interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal architecture includes an 8-bit address pointer, 16-byte page write buffer, and on-chip HV generator for EEPROM programming.
It supports three read modes-current address, random, and sequential-and uses acknowledge polling to detect write cycle completion. The device does not respond to I²C commands during internal erase/write operations, requiring software-level timing coordination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 × 8-bit), organized in eight 256-word blocks for block-select addressing |
| VCC Range | 2.5V to 5.5V - defines minimum system supply rail; incompatible with sub-2.5V logic domains |
| Max Clock Frequency | 400 kHz - limits bus throughput to ~40 KB/s in page-write mode with ACK overhead |
| Page Write Buffer | 16 bytes - enables atomic multi-byte writes within a single physical page boundary (0x00–0x0F, 0x10–0x1F, etc.) |
| Write Cycle Time | 5 ms maximum - sets worst-case latency before next I²C command can be issued |
| Endurance | 1,000,000 erase/write cycles - supports >10 years of daily reconfiguration in field-deployed equipment |
| Data Retention | 200 years at +25°C - ensures long-term reliability for firmware metadata and calibration constants |
Pinout & Package
24LC16B-I/ST is supplied in an 8-lead SOIC (SN) package per JEDEC MS-012AA, with standard 150-mil body width and 1.27 mm pitch. Pin 1 is marked by a beveled corner or dot; exposed pad is absent in SOIC variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS | Ground reference | Must be connected to system GND; serves as return path for SDA/SCL pull-up currents and internal logic |
| WP | Hardware write-protect input | Tied to VCC to disable all write operations; tied to VSS for full read/write access; no internal pull-up/down |
| SCL | Serial clock input | Asynchronous edge-triggered input; requires external pull-up; must meet THIGH/TLOW timing per VCC level |
| SDA | Bidirectional data I/O | Open-drain output; requires external pull-up resistor (2 kΩ typical for 400 kHz); shares bus with other I²C slaves |
| VCC | Power supply | Supplies core logic and EEPROM array; bypass capacitor (0.1 μF ceramic) required within 10 mm of pin |
| A0, A1, A2 | No-connect (NC) | Internally unconnected; may be left floating, tied to VSS, or tied to VCC without functional impact |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Provides 0.05×VCC hysteresis on SCL/SDA to reject <50 ns noise spikes and ensure robust operation on noisy PCBs |
| Output slope control | Slows SDA fall time to limit di/dt-induced ground bounce, eliminating false Start/Stop detection in mixed-signal systems |
| Page write capability | Reduces I²C transaction count by 16× versus byte-write for contiguous data, improving bus efficiency in firmware update scenarios |
| Hardware write protection | Enables permanent lock of critical configuration sectors (e.g., bootloader flags) without firmware intervention or fuse blowing |
| Industrial temperature range | Validated operation from –40°C to +85°C ensures reliability in factory automation, motor drives, and outdoor telemetry nodes |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed via I²C during boot and runtime reconfiguration. Use Value: Enables field-upgradable logic without firmware reflashing; 200-year data retention prevents parameter loss over equipment lifetime. | Use Scenario: Holding seat position presets, mirror angle offsets, and lighting profiles in vehicle BCMs. IC Role / Device Role / Timing Role: Slave EEPROM on chassis I²C bus; WP pin tied to ignition-switched VCC for write-lock during normal operation. Use Value: Survives 1M+ power cycles and meets AEC-Q100 Grade 2 requirements for under-hood ambient conditions. |
| Medical Infusion Pump Calibration Data | Smart Energy Meter Firmware Metadata |
Use Scenario: Storing flow-rate calibration coefficients, sensor offset corrections, and usage logs in Class II medical devices. IC Role / Device Role / Timing Role: Secure, low-power memory for FDA-required traceability data; accessed only during maintenance mode. Use Value: Hardware WP prevents accidental overwrite during routine diagnostics; ESD >4 kV protects against clinical environment discharge events. | Use Scenario: Recording firmware version, meter serial number, tariff schedule timestamps, and tamper-event counters in utility-grade meters. IC Role / Device Role / Timing Role: I²C slave on isolated RS-485 gateway MCU bus; powered from supercap backup during main power loss. Use Value: 1 μA standby current extends supercap hold-up time to >72 hours; page write minimizes bus occupancy during firmware updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA16-I/ST | Wider VCC range (1.7V–5.5V); supports 100 kHz below 2.5V; identical pinout and memory map | Preferred for battery-powered systems with brown-out conditions or 1.8V logic domains | Select when operating below 2.5V is required; otherwise functionally interchangeable in 2.5V+ designs |
| AT24C16C-PU | Same 16-Kbit capacity and SOIC-8 package; supports 1 MHz clock; different I²C address scheme (A0/A1/A2 used) | Requires PCB-level address pin routing changes; higher speed suits high-throughput logging | Choose for faster write throughput if address pins are available and layout allows; verify WP functionality matches |
Compared with 24LC16B-I/ST, the 24AA16-I/ST offers lower-voltage operation but same endurance and retention, while AT24C16C-PU enables faster bus rates at the cost of pin compatibility and requires redesign of address wiring.
Availability
24LC16B-I/ST is available at Aetrix Electronics and suitable for industrial control systems, automotive electronics, and medical instrumentation requiring stable component supply across extended product lifecycles.
Supply support for 24LC16B-I/ST 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 IATF 16949.
The 24LC16B belongs to Microchip's legacy 24XX16 EEPROM family, designed specifically for reliable, low-power nonvolatile storage in space-constrained embedded systems where I²C bus simplicity and write-protection security are critical.
FAQ
What is the minimum operating voltage for 24LC16B-I/ST?
The 24LC16B-I/ST requires a minimum VCC of 2.5V, as specified in its absolute maximum ratings and DC characteristics table. Operation below 2.5V is not guaranteed and may result in failed write cycles or incomplete reads. This distinguishes it from the 24AA16 variant, which supports down to 1.7V.
Does 24LC16B-I/ST support standard I²C addressing with A0/A1/A2 pins?
No - the A0, A1, and A2 pins on 24LC16B-I/ST are not internally connected and serve no addressing function. The device uses a fixed 4-bit control code (1010b) followed by 3 block-select bits (B2–B0), resulting in a hardwired slave address per memory block. These pins may be left floating or tied to VSS/VCC without effect.
How does the write-protect (WP) pin function on 24LC16B-I/ST?
When WP is tied to VCC, the entire 2048-byte memory array (addresses 0x000–0x7FF) is write-inhibited; read operations remain fully functional. When WP is tied to VSS, full read/write access is enabled. No internal pull-up or pull-down exists, so external biasing is mandatory for deterministic behavior.
What is the maximum supported I²C clock frequency for 24LC16B-I/ST?
The 24LC16B-I/ST supports up to 400 kHz when VCC is between 2.5V and 5.5V. At VCC < 2.5V, operation is not specified. This differs from the 24FC16 variant, which supports 1 MHz across the full 1.7V–5.5V range.
Can 24LC16B-I/ST perform page writes across memory boundaries?
No - page writes on 24LC16B-I/ST are restricted to a single 16-byte physical page (e.g., 0x00–0x0F). Attempting to write across a boundary (e.g., starting at 0x0F and writing 16 bytes) causes the address pointer to roll over within the same page, overwriting earlier bytes. Application firmware must enforce page-aligned write starts.
24LC16B-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC16B-I/ST FAQ
1.How can I place an order for 24LC16B-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC16B-I/ST 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-I/ST reliable?
The price and inventory of 24LC16B-I/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC16B-I/ST is usually 5 days.
3.What payment methods are accepted for 24LC16B-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC16B-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC16B-I/ST?
24LC16B-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC16B-I/ST 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-I/ST?
For technical support, including 24LC16B-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC16B-I/ST requirements.
6.How does Aetrix verify that 24LC16B-I/ST is sourced from the original manufacturer or authorized distributors?
All 24LC16B-I/ST 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-I/ST meets industry standards.
7.What is the process for return or replacement of 24LC16B-I/ST?
All 24LC16B-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC16B-I/ST, 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-I/ST part is unused and in its original packaging.
Return procedure for 24LC16B-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC16B-I/ST 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
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
