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Microchip Technology 25LC160DT-E/ST
- Part No.:
- 25LC160DT-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
25LC160DT-E/ST.pdf
- Description:
- IC EEPROM 16KBIT SPI 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,249
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Product details
Overview
25LC160DT-E/ST from Microchip Technology Inc. is a 16 Kbit SPI Serial EEPROM with 2048 × 8-bit organization, 32-byte page size, and automotive-grade temperature support (−40°C to +125°C). It operates from 2.5V to 5.5V, supports up to 10 MHz clock frequency, and delivers 5 mA read/write current at 5.5V - used for nonvolatile configuration storage in engine control units and ADAS sensor modules.
For engineers reviewing the 25LC160DT-E/ST datasheet, 25LC160DT-E/ST pinout, 25LC160DT-E/ST application, or 25LC160DT-E/ST equivalent, key selection criteria include its automotive temperature rating, hardware write-protection via WP pin and STATUS register, HOLD functionality for interrupt-safe SPI pauses, and 1M endurance with >200-year data retention.
Technical Context
The 25LC160DT-E/ST implements a standard SPI Mode 0,0 interface with separate SI (data-in) and SO (data-out) lines, requiring CS, SCK, and HOLD for full protocol compliance. Its internal architecture includes an 8-bit instruction register, page latches, and HV generator for EEPROM programming.
Write operations require explicit WREN instruction followed by CS high after final data bit; page writes are limited to 32 bytes within a single physical page boundary (0000h–001Fh, 0020h–003Fh, etc.). The STATUS register exposes WIP, WEL, BP0/BP1, and WPEN bits for real-time monitoring and configurable block protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 × 8-bit), enabling storage of firmware calibration tables or device ID parameters |
| Interface | SPI-compatible serial bus (Mode 0,0), compatible with PIC® and ARM Cortex-M microcontrollers without custom GPIO bit-banging |
| Page Size | 32 bytes, allowing efficient bulk writes while requiring software-level boundary checks to prevent wraparound |
| Max Clock Frequency | 10 MHz at VCC ≥ 4.5V, supporting fast configuration loading in time-critical boot sequences |
| Endurance | 1 million erase/write cycles, suitable for logging applications with frequent updates (e.g., odometer or fault counters) |
| Data Retention | 200+ years at +25°C, ensuring long-term reliability in unpowered automotive modules |
| Temp Range | −40°C to +125°C (Automotive E-grade), qualified for under-hood and radar module deployment |
Pinout & Package
25LC160DT-E/ST is packaged in an 8-lead TSSOP (ST suffix), measuring 4.4 mm × 3.0 mm × 1.2 mm, with lead pitch of 0.65 mm and Pb-free/RoHS-compliant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select Input | Active-low enable signal; must go high after final data bit to initiate internal write cycle; forces SO into high-impedance when deasserted |
| SO (Pin 2) | Serial Data Output | Tri-state output updated after falling edge of SCK; supports multi-device SPI bus sharing |
| WP (Pin 3) | Hardware Write-Protect Input | Blocks STATUS register writes when low and WPEN=1; no effect on memory reads or active writes |
| VSS (Pin 4) | Ground Reference | Primary return path for all I/O and core logic; requires low-inductance connection to minimize noise during write cycles |
| SI (Pin 5) | Serial Data Input | Latches instructions, addresses, and data on rising edge of SCK; accepts MSB-first 8-bit commands per SPI frame |
| SCK (Pin 6) | Serial Clock Input | Synchronizes all data transfers; rise/fall times ≤ 2 µs required for reliable operation at 10 MHz |
| HOLD (Pin 7) | Communication Pause Control | Halts ongoing SPI sequence when pulled low (with SCK low); resumes from exact byte position on release |
| VCC (Pin 8) | Supply Voltage | 2.5–5.5V operating range; decoupling capacitor (0.1 µF) required within 5 mm of pin for stable write margins |
Key Features
| Feature | Design Value |
|---|---|
| Block Write Protection | Configurable via BP0/BP1 bits to protect none, upper 1/4 (0600h–07FFh), upper 1/2 (0400h–07FFh), or entire array (0000h–07FFh) |
| Self-Timed Write Cycle | Internal 5 ms max write completion time eliminates need for external timing delays or polling overhead |
| Power-On Write Protection | Write enable latch resets at power-up, preventing accidental writes during supply ramp-up or brownout conditions |
| HOLD Functionality | Enables host MCU to service higher-priority interrupts mid-transfer without losing SPI state or reinitializing communication |
| ESD Robustness | 4 kV HBM rating ensures resilience against handling and board-level electrostatic discharge in manufacturing and field environments |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Storing trim values, fuel map coefficients, and diagnostic trouble codes (DTCs) that persist across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration storage interfaced directly to the ECU's SPI peripheral during boot and runtime calibration updates. Use Value: Automotive temperature rating (−40°C to +125°C) and 1M endurance ensure reliable operation over 15+ year vehicle lifetimes with frequent DTC logging. | Use Scenario: Holding camera lens calibration offsets and radar beamforming coefficients in front-facing ADAS sensors. IC Role / Device Role / Timing Role: SPI-configurable memory accessed during sensor initialization to load factory-trimmed analog front-end parameters. Use Value: 32-byte page writes enable efficient bulk loading of multi-parameter calibration sets without exceeding page boundaries or triggering wraparound corruption. |
| Infotainment Head Unit | Body Control Module (BCM) |
Use Scenario: Saving user preferences (volume, display brightness, seat position) and Bluetooth pairing records across power-down events. IC Role / Device Role / Timing Role: Low-power SPI EEPROM providing persistent storage for human-machine interface (HMI) state variables. Use Value: 5 µA standby current at 5.5V minimizes quiescent drain on always-on battery rails, extending sleep-mode battery life in parked vehicles. | Use Scenario: Storing door lock actuator calibration, window auto-up/down thresholds, and lighting fade profiles. IC Role / Device Role / Timing Role: Configuration memory mapped into the BCM microcontroller's SPI address space for runtime parameter access. Use Value: Hardware write-protection (WP pin + WPEN bit) prevents unintended overwrites during firmware updates or CAN bus fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 25LC160DT-I/ST | Industrial temperature range (−40°C to +85°C); identical electrical specs and pinout | Not qualified for under-hood or radar module use where ambient exceeds +85°C | Select only for cabin-located modules with controlled thermal environment |
| AT25DF021-SSH-T | 2 Mbit density, quad SPI interface, 85 MHz max clock; different command set and no HOLD pin | Requires firmware rewrite for command parsing and lacks interrupt-safe pause capability | Choose only when higher density and faster throughput outweigh loss of HOLD functionality and automotive qualification |
Compared with 25LC160DT-E/ST, the 25LC160DT-I/ST offers identical functionality but lacks automotive temperature validation, while the AT25DF021-SSH-T provides greater density and speed at the cost of SPI compatibility, HOLD support, and AEC-Q100 alignment - making the 25LC160DT-E/ST optimal for cost-sensitive, interrupt-aware automotive configurations.
Availability
25LC160DT-E/ST is available at Aetrix Electronics and suitable for engine control units, ADAS sensors, and body control modules requiring stable component supply across extended automotive production lifecycles.
Supply support for 25LC160DT-E/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 leading provider of microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 25LC160 series belongs to Microchip's automotive-qualified serial EEPROM product line, engineered specifically for robust, low-power nonvolatile storage in safety-critical vehicle subsystems.
FAQ
What is the maximum clock frequency supported by the 25LC160DT-E/ST?
The 25LC160DT-E/ST supports up to 10 MHz SPI clock frequency when VCC is 4.5V–5.5V. At 2.5V–4.5V, the maximum clock drops to 5 MHz, and at 1.8V–2.5V it is 3 MHz. These limits are defined in Table 1-2 of DS22150B and ensure reliable setup/hold timing across voltage and temperature ranges. The 25LC160DT-E/ST must be operated within these bounds to guarantee correct instruction decoding and data transfer integrity.
Does the 25LC160DT-E/ST support hardware write protection?
Yes, the 25LC160DT-E/ST supports hardware write protection through the WP pin in conjunction with the WPEN bit in the STATUS register. When WP is low and WPEN = 1, writes to the nonvolatile STATUS register bits (BP0, BP1, WPEN) are blocked. Memory array writes remain enabled unless also restricted by BP0/BP1 settings. This dual-layer protection prevents accidental corruption of critical configuration bits during system faults or firmware updates. The 25LC160DT-E/ST retains this behavior across its full −40°C to +125°C operating range.
What package type does the 25LC160DT-E/ST use?
The 25LC160DT-E/ST uses an 8-lead TSSOP package (ST suffix), with dimensions 4.4 mm × 3.0 mm × 1.2 mm, 0.65 mm lead pitch, and Pb-free/RoHS-compliant matte tin plating. This package is explicitly listed in the Device Selection Table and confirmed in Section 4.1 of DS22150B. It is footprint-compatible with other ST-suffix variants like 25AA160D and 25LC160D, enabling drop-in substitution within the same temperature grade.
How many write/erase cycles can the 25LC160DT-E/ST endure?
The 25LC160DT-E/ST is rated for more than 1 million erase/write cycles at 25°C and VCC = 5.5V, as specified in Table 1-3 (Param. No. 21) of DS22150B. This endurance is validated per JEDEC standards and applies to both byte and page write operations. Real-world endurance may vary with temperature and voltage; Microchip's Total Endurance™ Model (available at microchip.com) enables precise lifetime estimation for specific application conditions. The 25LC160DT-E/ST maintains this specification across its full automotive temperature range.
What is the function of the HOLD pin on the 25LC160DT-E/ST?
The HOLD pin on the 25LC160DT-E/ST suspends ongoing SPI communication without resetting the internal state, allowing the host microcontroller to service higher-priority interrupts and resume transmission from the exact byte position. HOLD must be asserted while SCK is low to avoid metastability; SO enters high-impedance during hold, and SI/SCK transitions are ignored. This feature is essential in real-time automotive systems where deterministic latency is required. The 25LC160DT-E/ST guarantees HOLD timing compliance down to 1.8V supply and across −40°C to +125°C.
25LC160DT-E/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- SPI
- Clock Frequency:
- 10 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
25LC160DT-E/ST FAQ
1.How can I place an order for 25LC160DT-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 25LC160DT-E/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 25LC160DT-E/ST reliable?
The price and inventory of 25LC160DT-E/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 25LC160DT-E/ST is usually 5 days.
3.What payment methods are accepted for 25LC160DT-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25LC160DT-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25LC160DT-E/ST?
25LC160DT-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25LC160DT-E/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 25LC160DT-E/ST?
For technical support, including 25LC160DT-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25LC160DT-E/ST requirements.
6.How does Aetrix verify that 25LC160DT-E/ST is sourced from the original manufacturer or authorized distributors?
All 25LC160DT-E/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 25LC160DT-E/ST meets industry standards.
7.What is the process for return or replacement of 25LC160DT-E/ST?
All 25LC160DT-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 25LC160DT-E/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 25LC160DT-E/ST part is unused and in its original packaging.
Return procedure for 25LC160DT-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
25LC160DT-E/ST Tags
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