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Microchip Technology 24CW160T-E/OT66KVAO
- Part No.:
- 24CW160T-E/OT66KVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SC-74A, SOT-753
- Datasheet:
-
24CW160T-E/OT66KVAO.pdf
- Description:
- IC EEPROM 16KBIT I2C SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,635
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Product details
Overview
24CW160T-E/OT66KVAO from Microchip Technology is a 16-Kbit I²C serial EEPROM organized as 2048 × 8-bit memory, supporting byte/page writes (up to 32 bytes), self-timed write cycles ≤5 ms, and operation across 1.6V–5.5V. It features programmable hardware client address bits (A2–A0), software write protection via WPR register, and AEC-Q100 qualification for automotive use.
For engineers reviewing the 24CW160T-E/OT66KVAO datasheet, 24CW160T-E/OT66KVAO pinout, 24CW160T-E/OT66KVAO application, or 24CW160T-E/OT66KVAO equivalent, key selection considerations include its extended temperature range (–40°C to +125°C), 1 MHz I²C interface compliance, 32-byte page size, hardware address configurability, and permanent lock capability for configuration registers.
Technical Context
The 24CW160T-E/OT66KVAO 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 dedicated Write Protection Register (WPR) and Hardware Address Register (HAR), both configurable and lockable to prevent runtime modification.
It supports up to eight devices on a shared bus via three programmable address bits (A2–A0), uses open-drain SDA/SCL with external pull-ups, and enters low-power standby mode after Stop condition or power-up reset - with tPUP = 100 µs minimum delay before first command acceptance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 16 Kbit (2048 × 8-bit organization) |
| I²C Speed | Up to 1 MHz - enables high-throughput configuration storage in real-time systems |
| Page Size | 32 bytes - defines maximum contiguous write per self-timed cycle |
| Write Cycle Time | ≤5 ms - determines minimum interval between write commands |
| Voltage Range | 1.6V–5.5V - supports direct interfacing with 1.8V, 3.3V, and 5V microcontrollers |
| Temp Range | –40°C to +125°C (Extended grade) - validated for under-hood automotive environments |
| Data Retention | >200 years at +55°C - ensures long-term calibration and firmware parameter integrity |
| Endurance | 1,000,000 erase/write cycles - suitable for dynamic logging and field-updatable settings |
Pinout & Package
24CW160T-E/OT66KVAO is packaged in an 8-lead UDFN (Ultra Thin Dual Flat No-lead) with exposed pad, measuring 2.0 mm × 2.5 mm × 0.55 mm. Pin 1 is SCL; Pin 2 is VSS; Pin 3 is SDA; Pin 4 is NC; Pin 5 is VCC; Pins 6–8 are NC. The exposed pad may be connected to VSS or left floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL | Serial Clock Input | Synchronizes all I²C transactions; requires external pull-up; accepts 1 MHz clock with THIGH ≥260 ns |
| VSS | Ground Reference | Primary return path for logic and leakage currents; connects to PCB ground plane |
| SDA | Bidirectional Data Line | Open-drain I/O - requires external pull-up; changes only during SCL low except for Start/Stop |
| NC | No Connect | Unbonded die pad - must remain unconnected to avoid parasitic coupling |
| VCC | Power Supply | Supplies core logic and EEPROM programming voltage; decoupling capacitor required near pin |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Address Programmability | A2–A0 bits set via HAR register - enables up to eight identical parts on one I²C bus without address conflict |
| Software Write Protection | WPR register configures protected address ranges - prevents accidental overwrites of critical calibration or security data |
| Configuration Lock | WPR and HAR can be permanently locked - eliminates post-deployment reconfiguration risk |
| AEC-Q100 Qualification | Qualified for automotive Grade 0/1 - meets stress testing requirements for engine control, ADAS, and infotainment modules |
| Low-Power Standby | 1.0 µA max ICCS at 5.5V (E-temp) - minimizes battery drain in always-on vehicle subsystems |
Applications
| Engine Control Unit (ECU) Calibration Storage | Automotive Infotainment Settings Retention |
|---|---|
Use Scenario: Storing fuel map coefficients, sensor offsets, and adaptive learning parameters that persist across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via I²C during boot and runtime updates. Use Value: Enables field calibration without requiring reprogramming; survives 1M+ write cycles and >200-year data retention at elevated under-hood temperatures. | Use Scenario: Retaining user preferences (volume, EQ, display brightness) and Bluetooth pairing keys across power loss. IC Role / Device Role / Timing Role: Low-voltage I²C EEPROM interfaced directly with infotainment SoC's GPIO/I²C controller. Use Value: Operates down to 1.6V - compatible with 1.8V domain logic; AEC-Q100 qualification ensures reliability in vibration-prone cabin environments. |
| Industrial PLC Configuration Backup | Medical Device Parameter Archiving |
Use Scenario: Preserving ladder logic configuration, I/O mapping, and alarm thresholds during AC power interruption. IC Role / Device Role / Timing Role: Secondary nonvolatile memory backing up volatile RAM contents upon brown-out detection. Use Value: 5 ms write time allows fast save before backup capacitors deplete; 1.6V operation extends functional window during undervoltage events. | Use Scenario: Storing device-specific calibration constants, usage logs, and regulatory audit trails in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage element with write-protection granularity for FDA-compliant data integrity. Use Value: WPR register enables partitioning of memory into protected (calibration) and unprotected (log) zones; ESD rating >4 kV protects against handling damage during service. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C16D-SSHM-T | 16-Kbit, 1 MHz I²C, but lacks HAR/WPR lock capability and AEC-Q100 qualification | Not qualified for automotive under-hood use; limited to industrial/commercial temperature range (–40°C to +85°C) | Choose when cost sensitivity outweighs automotive qualification and configuration locking needs |
| BR24G16FJ-3GE2 | 16-Kbit, 1 MHz I²C, supports 1.7V–5.5V, but no hardware address bits - fixed 7-bit address | Supports fewer devices per bus (no cascading); lacks AEC-Q100 certification | Prefer where board space is constrained and single-device I²C topology suffices |
Compared with AT24C16D-SSHM-T and BR24G16FJ-3GE2, the 24CW160T-E/OT66KVAO uniquely combines AEC-Q100 qualification, programmable hardware addressing, and permanent register locking - making it the only option among the three suitable for safety-critical automotive subsystems requiring multi-device bus scalability and immutable configuration.
Availability
24CW160T-E/OT66KVAO is available at Aetrix Electronics and suitable for automotive ECU calibration storage, infotainment settings retention, and industrial PLC configuration backup requiring stable component supply, long-lifecycle support, and AEC-Q100 compliance.
Supply support for 24CW160T-E/OT66KVAO 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 leading provider of microcontroller, analog, FPGA, and memory solutions, serving automotive, industrial, consumer, and communications markets with vertically integrated silicon and software platforms.
The 24CW Series was designed specifically for automotive and extended-temperature industrial applications requiring robust, low-voltage, high-reliability serial EEPROM with flexible addressing and secure configuration locking.
FAQ
What is the hardware client address preset for 24CW160T-E/OT66KVAO?
The "0" suffix in 24CW160T-E/OT66KVAO indicates a preset hardware client address of A2=0, A1=0, A0=0. This corresponds to the base device address 0xA0 (binary 1010000) for write operations. The address is modifiable via the Hardware Address Register (HAR) and can be permanently locked after configuration.
Does 24CW160T-E/OT66KVAO support 1 MHz I²C communication at 1.8V supply?
Yes, 24CW160T-E/OT66KVAO supports full 1 MHz I²C operation at VCC = 1.8V, as confirmed by DC and AC characterization in DS20005772D. The device meets THIGH ≥260 ns and TLOW ≥500 ns timing requirements across 1.6V–5.5V, enabling interoperability with modern low-voltage microcontrollers.
How is write protection implemented in 24CW160T-E/OT66KVAO?
24CW160T-E/OT66KVAO implements software write protection using the Write Protection Register (WPR), which defines protected address ranges within the 2048-byte array. Once configured, the WPR can be permanently locked to prevent further modification - ensuring critical calibration or security data remains immutable after deployment.
What package type does 24CW160T-E/OT66KVAO use, and is the exposed pad required to connect to ground?
24CW160T-E/OT66KVAO uses an 8-lead UDFN package (2.0 mm × 2.5 mm). The exposed pad may be connected to VSS or left electrically floating - no mandatory grounding is required per Microchip's DS20005772D, though grounding is recommended for thermal and EMI performance in high-density layouts.
Can 24CW160T-E/OT66KVAO operate reliably in under-hood automotive environments?
Yes, 24CW160T-E/OT66KVAO is AEC-Q100 qualified for Extended temperature range (–40°C to +125°C) and specified for operation across 1.6V–5.5V. Its 1 µA standby current at 5.5V/E-temp, >4 kV ESD rating, and >200-year data retention at +55°C confirm suitability for under-hood ECUs, body controllers, and ADAS modules.
24CW160T-E/OT66KVAO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- 24CW
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 16Kbit
- Memory Organization:
- 2K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 450 ns
- Voltage - Supply:
- 1.6V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
24CW160T-E/OT66KVAO FAQ
1.How can I place an order for 24CW160T-E/OT66KVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for 24CW160T-E/OT66KVAO 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 24CW160T-E/OT66KVAO reliable?
The price and inventory of 24CW160T-E/OT66KVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24CW160T-E/OT66KVAO is usually 5 days.
3.What payment methods are accepted for 24CW160T-E/OT66KVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24CW160T-E/OT66KVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24CW160T-E/OT66KVAO?
24CW160T-E/OT66KVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24CW160T-E/OT66KVAO 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 24CW160T-E/OT66KVAO?
For technical support, including 24CW160T-E/OT66KVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24CW160T-E/OT66KVAO requirements.
6.How does Aetrix verify that 24CW160T-E/OT66KVAO is sourced from the original manufacturer or authorized distributors?
All 24CW160T-E/OT66KVAO 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 24CW160T-E/OT66KVAO meets industry standards.
7.What is the process for return or replacement of 24CW160T-E/OT66KVAO?
All 24CW160T-E/OT66KVAO units undergo pre-shipment inspection (PSI). If there is an issue with 24CW160T-E/OT66KVAO, 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 24CW160T-E/OT66KVAO part is unused and in its original packaging.
Return procedure for 24CW160T-E/OT66KVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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