My Inquiry
My Account
Microchip Technology AT24C128W-10SC-1.8
- Part No.:
- AT24C128W-10SC-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT24C128W-10SC-1.8.pdf
- Description:
- IC EEPROM 128KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,080
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT24C128W-10SC-1.8 from Microchip Technology (formerly Atmel) is a 128 Kbit (16,384 × 8) I²C-compatible serial EEPROM optimized for ultra-low-voltage embedded systems. It operates from 1.8 V to 3.6 V, supports 100 kHz I²C bus speed at 1.8 V, features hardware write protection via the WP pin, and delivers 100,000 write cycles with 40-year data retention - ideal for battery-powered IoT sensors and portable medical devices.
For engineers reviewing the AT24C128W-10SC-1.8 datasheet, AT24C128W-10SC-1.8 pinout, AT24C128W-10SC-1.8 application, or AT24C128W-10SC-1.8 equivalent, key selection considerations include its 1.8 V operation range, 64-byte page write capability, Schmitt-triggered noise-immune inputs, and compatibility with industrial temperature-grade variants in SOIC-8 and dBGA packages.
Technical Context
The AT24C128W-10SC-1.8 implements a standard two-wire (I²C) interface with open-drain SDA and edge-triggered SCL, supporting up to four devices on a shared bus using A0/A1 address pins. Its memory is organized as 256 pages of 64 bytes each, enabling efficient partial-page writes without rollover across page boundaries when limited to ≤64 bytes per transaction.
Internally, it uses a self-timed write cycle (max 20 ms), automatic acknowledge polling, and a proprietary internal bias circuit that pulls A0/A1 low when floating - ensuring deterministic device addressing and eliminating external pull-downs in most configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 128 Kbit (16,384 × 8), sufficient for firmware parameter storage or calibration data in compact microcontroller systems |
| Supply Voltage Range | 1.8 V to 3.6 V - enables direct interfacing with 1.8 V logic families and ultra-low-power MCUs without level shifting |
| I²C Bus Speed | 100 kHz at 1.8 V - ensures reliable communication under low-voltage, high-noise conditions typical in portable electronics |
| Write Endurance | 100,000 cycles - supports frequent configuration updates in field-deployed equipment with multi-year service life |
| Data Retention | 40 years at +85°C - guarantees long-term integrity of stored calibration coefficients or security keys without refresh |
| Standby Current | 0.2 µA at 1.8 V - minimizes quiescent power draw in always-on sensor nodes and energy-harvesting applications |
| Page Write Size | 64 bytes - balances write efficiency and atomicity; allows partial writes without erasing full pages or risking corruption |
Pinout & Package
AT24C128W-10SC-1.8 is packaged in an 8-pin JEDEC SOIC (8S2) with 0.200" body width, measuring 4.90 mm × 3.90 mm × 1.75 mm, suitable for automated SMT assembly and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardwired low/high or left floating (internally pulled down); selects one of four possible I²C addresses on shared bus |
| A1 | Device Address Input | Same function as A0; combined with A0, enables up to four AT24C128W-10SC-1.8 devices on same I²C bus |
| NC | No Connect | Unbonded pin; must remain unconnected - no routing or grounding required |
| GND | Ground Reference | Return path for all internal circuitry and I/O; requires low-impedance connection to system ground plane |
| VCC | Power Supply | Accepts 1.8–3.6 V; bypass capacitor (0.1 µF ceramic) recommended within 5 mm of pin |
| WP | Hardware Write Protect | Pulled high to VCC to disable all writes; tied low or left floating for normal operation |
| SCL | Serial Clock Input | Positive-edge sampled clock; requires external pull-up (typically 4.7 kΩ to VCC) for proper I²C timing |
| SDA | Serial Data I/O | Open-drain bidirectional line; shares pull-up with other I²C devices; supports wire-OR arbitration |
Key Features
| Feature | Design Value |
|---|---|
| 1.8 V Operation | Enables seamless integration with modern ultra-low-power microcontrollers (e.g., ARM Cortex-M0+, MSP430FR) without voltage translation |
| Schmitt Trigger Inputs | Suppresses noise-induced glitches on SCL/SDA in electrically noisy environments like motor control or industrial gateways |
| 64-byte Page Write | Reduces write time vs. byte-by-byte programming - critical for minimizing bus occupancy in real-time systems |
| Hardware Write Protection | Prevents accidental or malicious overwrites of critical configuration data during firmware updates or brown-out events |
| Industrial Temperature Range | Rated for –40°C to +85°C operation - validated for use in automotive body controllers and outdoor metering equipment |
Applications
| Smart Energy Meters | Medical Wearables |
|---|---|
Use Scenario: Storing tariff schedules, meter calibration constants, and tamper-event logs in utility-grade electricity meters. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed 40-year data retention and immunity to power-loss corruption during firmware upgrades. Use Value: Eliminates need for external backup capacitors or supercapacitors by maintaining data integrity through >100,000 write cycles and extended temperature exposure. | Use Scenario: Logging heart rate variability (HRV) thresholds and user-specific alarm settings in FDA-cleared ECG patches. IC Role / Device Role / Timing Role: Secure, low-power configuration storage interfaced directly to 1.8 V BLE SoCs without level shifters. Use Value: Reduces BOM count and PCB area by leveraging native 1.8 V operation and SOIC-8 footprint compatible with high-volume pick-and-place lines. |
| Industrial PLC I/O Modules | Automotive Body Control Units |
Use Scenario: Holding channel-specific scaling factors and fault-history records in DIN-rail mounted programmable logic controller expansion modules. IC Role / Device Role / Timing Role: Robust I²C slave device with Schmitt-triggered inputs tolerating EMI from nearby 24 V solenoid drivers. Use Value: Ensures reliable communication at 100 kHz even under conducted noise up to 2 kV per IEC 61000-4-4, reducing firmware validation effort. | Use Scenario: Storing seat-position memory profiles and mirror-angle presets in 12 V vehicle architectures with local 1.8 V domain regulation. IC Role / Device Role / Timing Role: Automotive-grade EEPROM with qualified -40°C to +85°C operation and AEC-Q100 stress testing compliance. Use Value: Supports zero-defect manufacturing requirements via 100% tested WP functionality and production traceability per lot code. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C128BN-SH-T | Same 128 Kbit density and 1.8 V operation, but in 8-ball dBGA (8U1) package; lower profile (0.55 mm max height) and finer pitch (0.5 mm) | Better suited for ultra-thin handhelds or wearables where SOIC-8 height or footprint is prohibitive | Select AT24C128BN-SH-T only if board space or Z-height constraints justify requalification for dBGA assembly and test. |
| M24128-BWMN6TP | STMicroelectronics 128 Kbit EEPROM with identical 1.8–3.6 V range and 100 kHz speed, but rated for -40°C to +105°C and featuring enhanced ESD (6 kV HBM) | Preferred for under-hood automotive modules requiring extended temperature margin beyond +85°C | Choose M24128-BWMN6TP when operating ambient exceeds +85°C or when higher ESD robustness is mandated by system-level EMC testing. |
Compared with AT24C128W-10SC-1.8, AT24C128BN-SH-T offers miniaturization at the cost of solder joint reliability validation, while M24128-BWMN6TP extends thermal and ESD margins without altering I²C protocol behavior - both require layout changes but preserve functional equivalence in parameter storage roles.
Availability
AT24C128W-10SC-1.8 is available at Aetrix Electronics and suitable for smart energy meters, medical wearables, industrial PLC I/O modules, and automotive body control units requiring stable component supply across multi-year production cycles.
Supply support for AT24C128W-10SC-1.8 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 is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with broad industrial and automotive qualification capabilities.
The AT24C128W-10SC-1.8 belongs to Microchip's legacy AT24C serial EEPROM product line, designed specifically for reliable, low-voltage, low-power parameter and configuration storage in resource-constrained embedded systems.
FAQ
What is the maximum I²C clock frequency supported by AT24C128W-10SC-1.8 at 1.8 V?
The AT24C128W-10SC-1.8 supports a maximum I²C clock frequency of 100 kHz when operated at 1.8 V, as specified in its AC characteristics table. This limit ensures setup/hold timing margins are met under worst-case voltage and temperature conditions. Higher frequencies (e.g., 400 kHz) are only guaranteed at ≥2.5 V supply, so using 100 kHz at 1.8 V prevents communication errors in low-voltage designs. The AT24C128W-10SC-1.8 datasheet explicitly defines this derating to maintain robustness in battery-powered applications.
Does AT24C128W-10SC-1.8 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C128W-10SC-1.8 requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and speed - 4.7 kΩ is recommended for 100 kHz operation with ≤400 pF total bus load. The AT24C128W-10SC-1.8 does not integrate internal pull-ups, so omitting external resistors will prevent bus communication entirely. Always verify pull-up strength using the rise-time formula tr = 0.847 × RPU × Cb.
Can AT24C128W-10SC-1.8 be used interchangeably with AT24C128N-10SC-1.8?
No, AT24C128W-10SC-1.8 and AT24C128N-10SC-1.8 are not interchangeable despite identical memory size and voltage rating. The "W" suffix denotes a lead-free, RoHS-compliant version with matte tin finish and qualified for industrial temperature range (–40°C to +85°C), whereas "N" indicates a legacy SnPb finish. Their packaging differs: AT24C128W-10SC-1.8 uses 8S2 (EIAJ SOIC), while AT24C128N-10SC-1.8 uses 8S1 (JEDEC SOIC) - differing in width (0.200" vs. 0.150") and land pattern. Substituting them requires PCB redesign.
How does the WP pin function on AT24C128W-10SC-1.8 during power-up sequences?
On AT24C128W-10SC-1.8, the WP pin has an internal weak pull-down, so it defaults to logic low (write-enabled) when left unconnected. During power-up, WP remains inactive until VCC stabilizes above ~1.0 V, after which the internal bias circuit asserts the default state. Tying WP to VCC disables all write operations - including page and byte writes - but read operations remain fully functional. This behavior makes AT24C128W-10SC-1.8 safe for boot-time reads before firmware initializes GPIOs, and allows runtime write protection via MCU-controlled VCC switching.
What is the endurance specification for AT24C128W-10SC-1.8, and how is it measured?
The AT24C128W-10SC-1.8 is rated for 100,000 write cycles per memory location, measured per JEDEC Standard No. 22-A117 using page-write mode at 25°C and VCC = 5.0 V. This endurance applies uniformly across all 16,384 addresses and is guaranteed under specified operating conditions - not extrapolated or estimated. Endurance degrades predictably with temperature and voltage stress, so actual field life exceeds 100K cycles in 1.8 V, 25°C applications. The AT24C128W-10SC-1.8 datasheet confirms this value is production-tested, not just characterized.
AT24C128W-10SC-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 128Kbit
- Memory Organization:
- 16K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 1.8V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C128W-10SC-1.8 FAQ
1.How can I place an order for AT24C128W-10SC-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C128W-10SC-1.8 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 AT24C128W-10SC-1.8 reliable?
The price and inventory of AT24C128W-10SC-1.8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C128W-10SC-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C128W-10SC-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C128W-10SC-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C128W-10SC-1.8?
AT24C128W-10SC-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C128W-10SC-1.8 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 AT24C128W-10SC-1.8?
For technical support, including AT24C128W-10SC-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C128W-10SC-1.8 requirements.
6.How does Aetrix verify that AT24C128W-10SC-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C128W-10SC-1.8 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 AT24C128W-10SC-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C128W-10SC-1.8?
All AT24C128W-10SC-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C128W-10SC-1.8, 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 AT24C128W-10SC-1.8 part is unused and in its original packaging.
Return procedure for AT24C128W-10SC-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C128W-10SC-1.8 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…
