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Microchip Technology 25LC1024T-E/SM16KVAO
- Part No.:
- 25LC1024T-E/SM16KVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
25LC1024T-E/SM16KVAO.pdf
- Description:
- IC EEPROM 1MBIT SPI 20MHZ 8SOIJ
- Quantity:
- Payment:
- Shipping:
Inventory:2,871
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Product details
Overview
25LC1024T-E/SM16KVAO from Microchip Technology Inc. is a 1-Mbit (131,072-byte) SPI serial EEPROM with byte/page write, page/sector/chip erase, and hardware write protection via WP pin and STATUS register. It operates from 2.5V to 5.5V, supports up to 20 MHz clock at 4.5–5.5V, features 1 µA deep power-down current at 2.5V, and is AEC-Q100 qualified for automotive applications including engine control units and ADAS sensor modules.
For engineers reviewing the 25LC1024T-E/SM16KVAO datasheet, 25LC1024T-E/SM16KVAO pinout, 25LC1024T-E/SM16KVAO application, or 25LC1024T-E/SM16KVAO equivalent, this device delivers deterministic 6 ms internal write cycle time, sector-level write protection (32 KB per sector), SPI Mode 0/1 compatibility, HOLD pin for interrupt-safe bus suspension, and electronic signature for automated device identification in production programming.
Technical Context
The 25LC1024T-E/SM16KVAO implements a true SPI-compatible interface with separate SI/SO lines, CS-controlled selection, and HOLD-driven pause/resume capability-enabling seamless integration with PIC® and other microcontrollers without bit-banging overhead. Its architecture includes an 8-bit instruction register, 256-byte page buffer, and nonvolatile STATUS register with BP0/BP1 block protection bits and WPEN enable control.
It supports four erase granularities-byte (implicit), page (6 ms), sector (10 ms), and chip (10 ms)-all self-timed and requiring no external erase voltage. Write operations are gated by a volatile WEL latch set via WREN and reset on WRDI, WRITE, or power-up, while hardware write protection engages only when WP is low *and* WPEN is high, allowing flexible system-level security partitioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (131,072 bytes), organized as 512 pages × 256 bytes - enables efficient firmware patch storage with minimal page boundary management overhead |
| Max Clock Frequency | 20 MHz at VCC ≥ 4.5V - supports high-throughput configuration loading in real-time systems |
| Page Write Time | 6 ms max - defines minimum interval between successive page writes; impacts boot-time parameter initialization latency |
| Deep Power-Down Current | 1 µA at 2.5V, +85°C - enables multi-year battery-backed data retention in telematics and ECU sleep modes |
| Endurance | 1 million erase/write cycles per page - ensures reliability over 10+ years of daily calibration log updates in industrial controllers |
| Data Retention | >200 years - guarantees long-term integrity of vehicle VIN, calibration IDs, and safety-critical configuration flags |
| Temperature Range | -40°C to +125°C (Extended grade) - validated for under-hood automotive deployment per AEC-Q100 Rev G |
Pinout & Package
25LC1024T-E/SM16KVAO uses an 8-lead SOIJ (Small Outline Integrated Circuit, J-bend) package with 1.27 mm pitch, RoHS-compliant matte tin lead finish, and exposed pad connected to VSS per Microchip's DFN-S pin mapping guidance. The package supports reflow soldering per JEDEC J-STD-020D and is rated for 260°C peak temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low enable: drives device into Standby mode when high; must be low for all SPI transactions; rising edge triggers internal write cycle completion |
| SO | Serial Data Output | Tri-state open-drain output: data shifted out MSb-first on falling SCK edge; enters high-Z when CS high or HOLD low |
| WP | Write-Protect Pin | Hardware lock control: blocks STATUS register writes only when WP low *and* WPEN=1; otherwise ignored - allows safe field updates without physical jumper removal |
| VSS | Ground Reference | Primary return path for all I/O and core logic; exposed pad (if present) must be tied to VSS for thermal and EMI performance |
| SI | Serial Data Input | CMOS input: latches instruction/address/data on rising SCK edge; accepts standard SPI Mode 0/1 waveforms without level shifting |
| SCK | Serial Clock Input | Asynchronous master clock: defines timing for SI sampling and SO updating; max 20 MHz at 4.5–5.5V, 10 MHz at 2.5–5.5V |
| HOLD | Hold Input | Bus suspend control: pauses ongoing SPI transfer when pulled low during SCK low phase; resumes on next SCK low-to-high transition - critical for servicing MCU interrupts mid-read |
| VCC | Supply Voltage | 2.5V–5.5V operation: supports direct connection to 3.3V or 5V rails; internal regulation ensures stable EEPROM core voltage across range |
Key Features
| Feature | Design Value |
|---|---|
| Page/sector/chip erase instructions | Enables Flash-like firmware update workflows without requiring full-chip erase before partial reprogramming - reduces field upgrade time by >90% vs. legacy EEPROMs |
| Hardware write protection with WPEN bit | Allows permanent disable of STATUS register writes while permitting array writes - secures factory calibration data against accidental overwrite during service mode |
| HOLD pin with immediate tri-state SO | Permits MCU to service higher-priority interrupts mid-transaction without losing SPI state - eliminates need for software buffering or transaction restart logic |
| Electronic signature (RDID command) | Provides 8-bit manufacturer ID (0x30) and device ID (0x13) for automated BOM verification and counterfeit detection in automated programming stations |
| AEC-Q100 Grade 1 qualification | Validated for automotive extended temperature (-40°C to +125°C) and humidity testing - meets requirements for powertrain, chassis, and ADAS ECUs |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Storing and updating real-time fuel injection maps, knock sensor calibration offsets, and OBD-II diagnostic trouble codes (DTCs) across vehicle lifetime. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced directly to PIC18F or dsPIC33 MCU SPI port; accessed during key-on initialization and runtime parameter adjustment. Use Value: 1M endurance and >200-year data retention ensure DTC history survives 15+ years of ownership; 6 ms page write enables sub-100ms map updates during active learning cycles. | Use Scenario: Holding camera lens focus profiles, radar object classification thresholds, and sensor fusion weighting coefficients in lane-keeping assist modules. IC Role / Device Role / Timing Role: SPI-configurable parameter store synchronized with CAN FD message schedules; updated during vehicle software OTA campaigns. Use Value: Sector-level write protection (BP0/BP1) isolates factory-calibrated coefficients from user-modifiable tuning parameters; HOLD pin prevents SPI corruption during CAN interrupt bursts. |
| Industrial PLC I/O Module | Medical Infusion Pump Controller |
Use Scenario: Retaining module-specific I/O mapping tables, scaling factors for analog inputs, and watchdog timeout configurations across power cycles and firmware upgrades. IC Role / Device Role / Timing Role: SPI EEPROM co-located with ARM Cortex-M4 host; accessed during cold start and hot-plug detection sequences. Use Value: Deep power-down current (1 µA) extends backup battery life to >5 years; 256-byte page size aligns with Modbus RTU register block sizes for atomic configuration commits. | Use Scenario: Securing drug library metadata, dose limit overrides, and regulatory audit logs in FDA-cleared infusion devices requiring traceable parameter history. IC Role / Device Role / Timing Role: Tamper-resistant configuration vault interfaced to secure bootloader; WP pin hardwired to ground during manufacturing to lock STATUS register. Use Value: Hardware write protection (WP+WPEN) prevents unauthorized modification of safety-critical limits; AEC-Q100 qualification satisfies IEC 62304 Class C component requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25DF041A-SSH-T | 4 Mbit density, quad SPI interface, 85 MHz max clock, no HOLD pin, requires 3.3V only | Higher throughput but lacks HOLD for interrupt-safe operation; not AEC-Q100 qualified | Select only if bandwidth >20 MB/s required and automotive qualification is unnecessary |
| BR24G128FJ-WE2 | 128 Kbit density, I²C interface, 1 MHz max clock, 1.7–5.5V supply, no sector erase | Lower density and slower interface; supports smaller form factor but lacks page/sector erase flexibility | Choose for space-constrained designs where I²C bus sharing is preferred and erase granularity is not critical |
Compared with AT25DF041A-SSH-T and BR24G128FJ-WE2, the 25LC1024T-E/SM16KVAO uniquely balances automotive-grade reliability, SPI HOLD functionality for deterministic interrupt handling, and Flash-like erase flexibility - making it optimal for safety-critical embedded systems requiring both robustness and field-upgrade agility.
Availability
25LC1024T-E/SM16KVAO is available at Aetrix Electronics and suitable for automotive ECU development, ADAS sensor calibration, industrial PLC configuration storage, medical device parameter vaulting, and aerospace telemetry logging requiring stable component supply across extended product lifecycles.
Supply support for 25LC1024T-E/SM16KVAO 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, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 25LC1024 product line delivers high-reliability serial EEPROMs optimized for automotive, industrial, and medical applications demanding AEC-Q100 qualification, deep power-down efficiency, and Flash-compatible erase flexibility - bridging the gap between traditional EEPROM simplicity and NOR Flash performance.
FAQ
What is the maximum clock frequency supported by the 25LC1024T-E/SM16KVAO?
The 25LC1024T-E/SM16KVAO supports up to 20 MHz clock frequency when VCC is 4.5V to 5.5V, and 10 MHz when VCC is 2.5V to 5.5V. These values are specified across the full -40°C to +125°C operating range and are validated per DS20002064E AC Characteristics Table 1-2. Exceeding these limits may cause read/write failures or timing violations.
Does the 25LC1024T-E/SM16KVAO support hardware write protection, and how is it configured?
Yes, the 25LC1024T-E/SM16KVAO supports hardware write protection using the WP pin in conjunction with the WPEN bit in the STATUS register. Protection activates only when WP is low *and* WPEN = 1. When WPEN = 0, the WP pin is ignored. This dual-control mechanism allows factory locking of critical registers while permitting field updates to unprotected memory regions - a feature confirmed in Section 2.3 and Table 3-4 of the datasheet.
What is the purpose of the HOLD pin on the 25LC1024T-E/SM16KVAO, and how must it be used?
The HOLD pin on the 25LC1024T-E/SM16KVAO suspends ongoing SPI communication without resetting the sequence, enabling the host MCU to service higher-priority interrupts. It must be asserted low while SCK is low to take effect, and de-asserted high while SCK is low to resume. SO immediately enters high-impedance upon HOLD assertion, as documented in Section 2.6 and Figure 1-1 of DS20002064E.
How does the 25LC1024T-E/SM16KVAO handle power-down and deep power-down modes?
The 25LC1024T-E/SM16KVAO enters Standby mode when CS is high, drawing ≤20 µA at +125°C. It enters Deep Power-Down mode via the DPD command (0xBB), reducing current to 1 µA at 2.5V/+85°C. In Deep Power-Down, only the RDID command (0xAB) is recognized to exit and read the electronic signature. Power cycling automatically exits Deep Power-Down, returning the device to Standby mode - details are in Section 3.10 and Table 1-1.
Is the 25LC1024T-E/SM16KVAO qualified for automotive applications, and what standards does it meet?
Yes, the 25LC1024T-E/SM16KVAO is AEC-Q100 qualified for Extended Temperature Range (-40°C to +125°C), as explicitly stated in the Device Selection Table and Description section of DS20002064E. It also meets RoHS compliance requirements and has been characterized for ESD protection >4 kV per HBM, ensuring suitability for under-hood automotive ECUs and ADAS modules.
25LC1024T-E/SM16KVAO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 20 MHz
- Write Cycle Time - Word, Page:
- 6ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIJ
25LC1024T-E/SM16KVAO FAQ
1.How can I place an order for 25LC1024T-E/SM16KVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for 25LC1024T-E/SM16KVAO 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 25LC1024T-E/SM16KVAO reliable?
The price and inventory of 25LC1024T-E/SM16KVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 25LC1024T-E/SM16KVAO is usually 5 days.
3.What payment methods are accepted for 25LC1024T-E/SM16KVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25LC1024T-E/SM16KVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25LC1024T-E/SM16KVAO?
25LC1024T-E/SM16KVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25LC1024T-E/SM16KVAO 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 25LC1024T-E/SM16KVAO?
For technical support, including 25LC1024T-E/SM16KVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25LC1024T-E/SM16KVAO requirements.
6.How does Aetrix verify that 25LC1024T-E/SM16KVAO is sourced from the original manufacturer or authorized distributors?
All 25LC1024T-E/SM16KVAO 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 25LC1024T-E/SM16KVAO meets industry standards.
7.What is the process for return or replacement of 25LC1024T-E/SM16KVAO?
All 25LC1024T-E/SM16KVAO units undergo pre-shipment inspection (PSI). If there is an issue with 25LC1024T-E/SM16KVAO, 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 25LC1024T-E/SM16KVAO part is unused and in its original packaging.
Return procedure for 25LC1024T-E/SM16KVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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