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Microchip Technology 25AA160DT-I/ST
- Part No.:
- 25AA160DT-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
25AA160DT-I/ST.pdf
- Description:
- IC EEPROM 16KBIT SPI 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,341
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Product details
Overview
25AA160DT-I/ST from Microchip Technology is a 16 Kbit (2048 × 8) SPI Serial EEPROM with 1.8–5.5 V supply, 32-byte page write capability, industrial temperature range (−40°C to +85°C), and built-in hardware write protection via WP pin and STATUS register. It interfaces directly with microcontroller SPI ports for nonvolatile data storage in embedded control, sensor calibration, and configuration retention applications.
For engineers reviewing the 25AA160DT-I/ST datasheet, 25AA160DT-I/ST pinout, 25AA160DT-I/ST application, or 25AA160DT-I/ST equivalent, key selection criteria include VCC operating range (1.8–5.5 V), page size (32 bytes), HOLD functionality for interrupt-safe bus suspension, and block write-protection granularity (none/¼/½/all array).
Technical Context
The 25AA160DT-I/ST implements a standard SPI Mode 0,0 (CPOL = 0, CPHA = 0) interface with separate SI and SO lines, requiring CS, SCK, SI, SO, WP, HOLD, VCC, and VSS. Its internal architecture includes an 8-bit instruction register, page latches, and high-voltage generator for EEPROM programming.
Write operations require explicit WREN instruction followed by CS high-to-low transition to initiate self-timed internal write cycle (≤5 ms). The STATUS register provides real-time visibility into WIP (Write-In-Process), WEL (Write Enable Latch), and BP0/BP1 (block protection) states - readable even during active writes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 × 8 bits); supports up to 2048 unique byte-addressable locations (0000h–07FFh) |
| Page Size | 32 bytes; enables burst writes within single physical page boundaries without wraparound corruption |
| Max Clock Frequency | 10 MHz at VCC ≥ 4.5 V; ensures high-speed read/write throughput compatible with modern MCU SPI peripherals |
| Write Endurance | >1 million erase/write cycles; guarantees long-term reliability in frequent configuration update scenarios |
| Data Retention | >200 years at +25°C; maintains stored calibration or setup data across product lifetime without refresh |
| Standby Current | 5 µA at VCC = 5.5 V and +125°C; minimizes power draw in always-on or battery-backed systems |
| VCC Range | 1.8 V to 5.5 V; supports direct interfacing with 1.8 V, 3.3 V, and 5 V logic domains without level shifting |
Pinout & Package
25AA160DT-I/ST is housed in an 8-lead TSSOP package (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 be low to initiate any SPI transaction; forces SO into high-impedance when high for multi-device bus sharing |
| SO (Pin 2) | Serial Data Output | Tri-state output delivering memory contents on falling edge of SCK; transitions to high-Z when CS high or HOLD low |
| WP (Pin 3) | Hardware Write-Protect Input | When WPEN bit = 1 and WP = low, disables writes to STATUS register nonvolatile bits; otherwise ignored |
| VSS (Pin 4) | Ground Reference | Primary return path for all internal circuitry and I/O; requires low-impedance connection to system ground plane |
| SI (Pin 5) | Serial Data Input | Latches instructions, addresses, and data on rising edge of SCK; accepts MSB-first SPI framing per Microchip's instruction set |
| SCK (Pin 6) | Serial Clock Input | Synchronizes all SPI transfers; defines timing for SI sampling (rising edge) and SO updates (falling edge) |
| HOLD (Pin 7) | Bus Hold Control | Pulls low (with SCK low) to pause ongoing SPI sequence; host can service higher-priority interrupts and resume from exact point |
| VCC (Pin 8) | Supply Voltage | Power input for core logic and EEPROM array; must remain stable within 1.8–5.5 V during all operations including write cycles |
Key Features
| Feature | Design Value |
|---|---|
| 32-byte page write | Enables efficient bulk configuration storage with single CS assertion, reducing SPI overhead vs. byte-wise writes |
| HOLD pin support | Allows deterministic interruption of SPI sequences without losing state - critical for real-time interrupt handling in MCU firmware |
| Four-level block protection | BP0/BP1 bits configure write-protection for none / upper 1/4 / upper 1/2 / full array - supports secure boot and parameter partitioning |
| Power-on write disable | WEL latch resets at power-up, preventing accidental writes during power ramp; requires explicit WREN before any write |
| 1.8 V operation | Supports direct integration with ultra-low-power microcontrollers and energy-harvesting systems without voltage translation |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed at system startup and during field recalibration routines via SPI. Use Value: Enables traceable, field-updatable calibration without requiring external NVM or firmware reflash - leveraging 200-year data retention and >1M endurance. | Use Scenario: Retaining user-selected therapy parameters and device serialization data in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for FDA-mandated audit logs and operational settings using hardware WP and STATUS register lock. Use Value: Meets IEC 62304 safety requirements via block protection (BP0/BP1) and power-on write disable - ensuring critical settings survive unexpected power loss. |
| Automotive ECU Parameter Storage | Smart Meter Firmware Metadata |
Use Scenario: Saving adaptive learning values (e.g., idle air control trim) across ignition cycles in engine control units. IC Role / Device Role / Timing Role: High-reliability EEPROM interfaced to automotive-grade MCU SPI peripheral under −40°C to +85°C ambient. Use Value: Guarantees operation across full industrial temperature range with 5 µA standby current - minimizing parasitic drain on vehicle battery. | Use Scenario: Holding firmware version, cryptographic keys, and tariff schedule timestamps in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: Trusted configuration vault accessed during secure boot and OTA update verification sequences. Use Value: Supports secure key lifecycle management via write-protection granularity (upper 1/4 array) - isolating sensitive fields from routine parameter updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 25AA160T-I/ST | Same 16 Kbit capacity and TSSOP-8 package, but 'C' variant with 16-byte page size instead of 32-byte | Lower page buffer reduces burst write efficiency; suitable where smaller page granularity simplifies firmware logic | Select 25AA160T-I/ST only if legacy code relies on 16-byte page alignment or avoids cross-page boundary checks |
| AT25DF021-SSH-T | 2 Mbit density, quad SPI interface, 3.0–3.6 V VCC range only; no HOLD or WP pins | Higher density for firmware storage; lacks hardware write protection and interrupt-safe HOLD - requires software-managed protection | Choose AT25DF021-SSH-T when migrating to larger code storage with QSPI acceleration, but verify absence of HOLD/WP meets system safety requirements |
Compared with 25AA160DT-I/ST, the 25AA160T-I/ST offers identical packaging and voltage range but halves page size - trading write throughput for simpler boundary management; the AT25DF021-SSH-T shifts to quad SPI and narrower VCC, sacrificing hardware protection for density and speed in non-safety-critical firmware storage.
Availability
25AA160DT-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive ECU parameter storage requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 25AA160DT-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 leading provider of microcontroller, mixed-signal, analog, and Flash-IP solutions, serving industrial, automotive, consumer, and communications markets with high-reliability silicon and development tools.
The 25AA160DT-I/ST belongs to Microchip's 25XX160 family of SPI Serial EEPROMs, designed specifically for robust, low-power nonvolatile data storage in resource-constrained embedded systems requiring guaranteed data integrity and long-term retention.
FAQ
What is the maximum clock frequency supported by the 25AA160DT-I/ST?
The 25AA160DT-I/ST supports up to 10 MHz SPI clock frequency when VCC is 4.5 V to 5.5 V. At 2.5 V ≤ VCC < 4.5 V, max clock drops to 5 MHz; at 1.8 V ≤ VCC < 2.5 V, it is limited to 3 MHz. These deratings ensure reliable timing margin across voltage and temperature - critical for deterministic operation in 25AA160DT-I/ST-based systems.
Does the 25AA160DT-I/ST support hardware write protection?
Yes, the 25AA160DT-I/ST supports hardware write protection via its WP pin combined with the WPEN bit in the STATUS register. When WPEN = 1 and WP = low, writes to nonvolatile STATUS bits are disabled. All other functions remain operational. This dual-control mechanism prevents accidental corruption of protection settings in the 25AA160DT-I/ST.
What is the page size of the 25AA160DT-I/ST, and why does it matter?
The 25AA160DT-I/ST has a 32-byte page size, meaning up to 32 bytes can be written in a single page write command - provided all addresses reside within the same physical page boundary (e.g., 0000h–001Fh). Exceeding this boundary causes wraparound, overwriting earlier bytes. This constraint directly impacts firmware efficiency and error handling in 25AA160DT-I/ST implementations.
How does the HOLD pin function in the 25AA160DT-I/ST?
The HOLD pin in the 25AA160DT-I/ST suspends ongoing SPI communication without resetting the internal state. When asserted low (with SCK low), SI/SO/SCK are tri-stated and ignored until HOLD returns high. This allows the host MCU to service time-critical interrupts and resume the exact transaction - a key feature distinguishing the 25AA160DT-I/ST from basic SPI EEPROMs.
What temperature range is specified for the 25AA160DT-I/ST?
The 25AA160DT-I/ST is rated for the industrial temperature range of −40°C to +85°C, as indicated by the 'I' suffix in its part number. This specification ensures guaranteed operation and parametric compliance across harsh ambient conditions typical in factory automation, outdoor electronics, and under-hood automotive subsystems using the 25AA160DT-I/ST.
25AA160DT-I/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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
25AA160DT-I/ST FAQ
1.How can I place an order for 25AA160DT-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 25AA160DT-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 25AA160DT-I/ST reliable?
The price and inventory of 25AA160DT-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 25AA160DT-I/ST is usually 5 days.
3.What payment methods are accepted for 25AA160DT-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25AA160DT-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25AA160DT-I/ST?
25AA160DT-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25AA160DT-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 25AA160DT-I/ST?
For technical support, including 25AA160DT-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25AA160DT-I/ST requirements.
6.How does Aetrix verify that 25AA160DT-I/ST is sourced from the original manufacturer or authorized distributors?
All 25AA160DT-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 25AA160DT-I/ST meets industry standards.
7.What is the process for return or replacement of 25AA160DT-I/ST?
All 25AA160DT-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 25AA160DT-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 25AA160DT-I/ST part is unused and in its original packaging.
Return procedure for 25AA160DT-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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