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Microchip Technology AT25160B-XHL-T
- Part No.:
- AT25160B-XHL-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT25160B-XHL-T.pdf
- Description:
- IC EEPROM 16KBIT SPI 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:8,448
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Product details
Overview
AT25160B-XHL-T from Microchip Technology is a 16 Kbit (2,048 × 8) SPI Serial EEPROM IC designed for nonvolatile data storage in microcontroller-based systems. It operates from 1.8V to 5.5V, supports 20 MHz clock rate at 5V, features 32-byte page write mode, and delivers 1,000,000 write cycles with 100-year data retention - deployed in industrial control modules requiring robust configuration storage.
For engineers reviewing the AT25160B-XHL-T datasheet, AT25160B-XHL-T pinout, AT25160B-XHL-T application, or AT25160B-XHL-T equivalent, key selection criteria include SPI Mode 0/3 compatibility, hardware/software write protection via WP/HOLD pins, industrial temperature range (–40°C to +85°C), green RoHS-compliant packaging, and self-timed 5 ms max write cycle.
Technical Context
The AT25160B-XHL-T implements a synchronous SPI slave interface with fixed MSb-first serial protocol, supporting both Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1). Its internal architecture includes a high-voltage generation circuit for EEPROM programming, a STATUS register with nonvolatile BP0/BP1 block protection bits and WPEN control, and dedicated HOLD/CS synchronization logic for pause-resume operation without clock reset.
Write operations are gated by a volatile Write Enable Latch (WEL), set via WREN instruction and cleared automatically after write completion or CS deassertion. The device integrates power-on reset (POR) with 100 µs tPUP delay, defaulting to standby mode with WEL=0 and Ready/Busy=0, ensuring deterministic initialization across voltage ramps from 1.8V to 5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbits (2,048 words × 8 bits); sufficient for firmware parameter tables, calibration data, or device identity storage in space-constrained embedded nodes. |
| Supply Voltage Range | 1.8V to 5.5V; enables direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level-shifting circuitry. |
| Max Clock Frequency | 20 MHz at VCC ≥ 4.5V; supports high-throughput configuration loading in real-time systems with tight boot timing budgets. |
| Page Write Size | 32 bytes per page; minimizes write latency versus byte-write while preserving endurance by limiting erase/write granularity. |
| Write Endurance | 1,000,000 cycles; guarantees reliable field-updatable storage for devices requiring frequent logging or counter updates over 10+ years. |
| Data Retention | 100 years at TA ≤ 55°C; ensures long-term integrity of factory-programmed settings or security keys without refresh. |
| Operating Temperature | –40°C to +85°C industrial grade; validated for deployment in automotive body controllers, industrial sensors, and outdoor IoT gateways. |
| Write Protection | Hardware (WP pin) + software (STATUS register BP0/BP1 bits); enables selective locking of top/bottom quarter or half of memory array against accidental overwrite. |
Pinout & Package
AT25160B-XHL-T is packaged in an 8-lead XDFN (eXtremely Thin Dual Flat No-lead) with wettable flank terminations, measuring 2.0 mm × 1.6 mm × 0.55 mm (max height), optimized for automated optical inspection (AOI) and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must transition high→low before SCK activity; drives SO into high-Z when deasserted. |
| SO | Serial Data Output | Tri-state output; shifts MSb-first data on falling edge of SCK during READ/RDSR; enters high-Z when CS high or HOLD active. |
| WP | Write-Protect | Hardware lock: inhibits STATUS register writes when low + WPEN=1; configurable via STATUS register to ignore WP state. |
| GND | Ground Reference | Primary return path for VCC and all I/O; requires low-impedance connection to system ground plane for noise immunity. |
| SI | Serial Data Input | Accepts MSb-first opcodes, addresses, and data on rising edge of SCK; ignored during HOLD or CS high. |
| SCK | Serial Clock Input | Asynchronous master-generated clock; defines timing for SI sampling (rising edge) and SO output (falling edge). |
| HOLD | Suspend Control | Pauses ongoing SPI transfer (e.g., mid-read) without resetting sequence; requires SCK low to assert/deassert; does not affect active write cycles. |
| VCC | Power Supply | Single supply input (1.8–5.5V); powers internal charge pump for EEPROM programming; requires local 100 nF decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 Support | Compatible with both common SPI polarity/phase configurations, eliminating need for bus-level protocol translation in mixed-vendor systems. |
| 32-Byte Page Write | Reduces average write time by up to 32× vs. byte-write while maintaining full 1M-cycle endurance specification across all pages. |
| Block Write Protection | Configurable via STATUS register to protect 1/4 (top 512B), 1/2 (top 1KB), or entire 2KB array - prevents corruption of critical boot or calibration sectors. |
| Self-Timed Write Cycle | Internal timing eliminates need for external delay loops or polling overhead; maximum 5 ms duration allows predictable worst-case interrupt latency. |
| Green RoHS Package | XDFN package is lead-free, halide-free, and compliant with IPC/JEDEC J-STD-020 moisture sensitivity level 3 (MSL3), enabling lead-free reflow assembly. |
| Power-On Reset (POR) | Guarantees known initial state (WEL=0, Ready=1) after VCC ramp; requires ≥100 µs stabilization before first command, preventing spurious writes during power-up. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers operating in factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during cold start and runtime parameter updates via SPI from ARM Cortex-M7 host. Use Value: 100-year data retention ensures calibration persistence across equipment lifetime; 1.8V operation enables direct interface with low-power supervisory MCUs. |
Use Scenario: Holding sensor offset/gain coefficients and regulatory compliance logs in portable diagnostic instruments subject to sterilization and battery-powered operation. IC Role / Device Role / Timing Role: Secure parameter vault accessed only during device initialization or service mode, protected by WP pin hardwired to VCC. Use Value: Block write protection prevents accidental overwrites of FDA-mandated calibration data; MSL3 XDFN package withstands multiple reflow cycles during board repair. |
| Automotive Body Control Module | Smart Energy Meter Firmware Settings |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and CAN node configuration in 12V automotive subsystems with load-dump transients. IC Role / Device Role / Timing Role: SPI slave storing user preferences and ECU-specific settings, accessed via isolated SPI bus from Infineon AURIX™ TC3xx. Use Value: –40°C to +85°C rating matches under-hood thermal requirements; HOLD pin enables safe interruption during CAN message bursts without data loss. |
Use Scenario: Retaining tariff schedules, meter ID, and tamper-event timestamps in utility-grade electricity meters deployed in uncontrolled outdoor enclosures. IC Role / Device Role / Timing Role: Tamper-resistant configuration store updated infrequently but requiring guaranteed write integrity during brownout conditions. Use Value: Self-timed 5 ms write cycle ensures completion before backup capacitor discharge; 1M-cycle endurance supports 10+ years of daily firmware patching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95160-DRMN6TP/K | 16 Kbit SPI EEPROM in 8-lead SOIC; max clock 20 MHz at 5V but only 5 MHz at 1.8V; no HOLD pin; WP pin functionality identical. | Lacks suspend capability; suitable for static configuration storage where bus arbitration is handled externally. | Select when board layout uses SOIC footprint and HOLD functionality is unnecessary; verify 1.8V timing margins for low-voltage operation. |
| BR24G16NUX-10 | 16 Kbit I²C EEPROM in 8-pin XDFN; 1 MHz max clock; built-in address pins for multi-device buses; no WP/HOLD pins; 1.7–5.5V supply. | Requires I²C host interface and pull-up resistors; lacks hardware write-suspend; better suited for low-pin-count designs with existing I²C infrastructure. | Choose when migrating from I²C-based legacy platforms; avoid if SPI bus bandwidth >1 MHz or HOLD-driven real-time pausing is required. |
Compared with M95160-DRMN6TP/K and BR24G16NUX-10, the AT25160B-XHL-T uniquely combines XDFN space savings, 20 MHz SPI performance at 5V, and dual hardware controls (WP + HOLD) for deterministic, interrupt-safe configuration management in resource-constrained embedded systems.
Availability
AT25160B-XHL-T is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, automotive body electronics, and smart metering applications requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for AT25160B-XHL-T 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, manufacturing, and sales operations.
The AT25160B-XHL-T belongs to Microchip's AT25xxx family of SPI Serial EEPROMs, engineered for low-power, high-reliability nonvolatile storage in cost-sensitive, space-constrained embedded systems across industrial, automotive, and consumer markets.
FAQ
What is the maximum clock frequency supported by the AT25160B-XHL-T at 3.3V operation?
The AT25160B-XHL-T supports up to 10 MHz SCK frequency when VCC is between 2.5V and 5.5V - covering standard 3.3V operation. This is specified in Table 4-3 of the DS20006244A datasheet under AC Characteristics. At 3.3V, timing parameters such as tWH (SCK high time) require minimum 40 ns, enabling reliable communication with most 3.3V microcontrollers without custom timing adjustments. The AT25160B-XHL-T maintains full functionality including page write and status register access at this speed.
Does the AT25160B-XHL-T require external pull-up resistors on its SPI lines?
The AT25160B-XHL-T does not require external pull-ups on SI, SO, or SCK - these are driven actively by the host and device. However, Microchip recommends a ≤10 kΩ pull-up resistor on the CS pin to ensure it remains high during power-up and prevents unintended device selection. The WP and HOLD pins may also benefit from weak pull-ups (e.g., 100 kΩ) if left unconnected in the system, though their default states are defined by the STATUS register and external logic. This guidance appears in Section 2.1 of the AT25080B/AT25160B datasheet.
How does the HOLD pin function during an active write cycle in the AT25160B-XHL-T?
The HOLD pin has no effect on an ongoing internal write cycle in the AT25160B-XHL-T - once a WRITE or WRSR command initiates programming, the operation completes autonomously within ≤5 ms regardless of HOLD state. HOLD only suspends serial communication (SI/SO/SCK interaction) during read, write setup, or status polling phases. This behavior is explicitly documented in Section 5.3: "The Hold mode, however, does not have an effect on the internal write cycle." Thus, the AT25160B-XHL-T ensures data integrity even if HOLD is asserted mid-command sequence.
Can the AT25160B-XHL-T be used in a 1.8V-only system without level shifters?
Yes, the AT25160B-XHL-T is fully specified for 1.8V operation across all functions: it accepts 1.8V–5.5V VCC, supports 5 MHz SCK at 1.8V, meets VIH/VIL thresholds for 1.8V logic (VIH ≥ 1.26V, VIL ≤ 0.54V), and draws <0.1 µA standby current at 1.8V. Its XDFN package has no voltage-dependent parasitics that would degrade signal integrity. Therefore, the AT25160B-XHL-T interfaces directly with 1.8V microcontrollers like the Silicon Labs EFM32HG or TI MSP430FRxx without level-shifting components, reducing BOM count and board area.
What is the default state of the STATUS register after power-up for the AT25160B-XHL-T?
Upon power-up, the AT25160B-XHL-T defaults to: Write Enable Latch (WEL) = 0 (disabling writes), Ready/Busy (RDY/BSY) = 0 (indicating ready state), and nonvolatile bits (WPEN, BP1, BP0) retain their last programmed values - they are not reset. This is confirmed in Section 4.6.5 ("Device Default State at Power-Up") and Section 4.6.6 ("Device Default Condition"), which further states the EEPROM array ships with all FFh data. So the AT25160B-XHL-T always starts in a safe, write-disabled, ready-to-accept-command state, with protection bits preserved across power cycles.
AT25160B-XHL-T 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:
- 20 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
AT25160B-XHL-T FAQ
1.How can I place an order for AT25160B-XHL-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25160B-XHL-T 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 AT25160B-XHL-T reliable?
The price and inventory of AT25160B-XHL-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25160B-XHL-T is usually 5 days.
3.What payment methods are accepted for AT25160B-XHL-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25160B-XHL-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25160B-XHL-T?
AT25160B-XHL-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25160B-XHL-T 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 AT25160B-XHL-T?
For technical support, including AT25160B-XHL-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25160B-XHL-T requirements.
6.How does Aetrix verify that AT25160B-XHL-T is sourced from the original manufacturer or authorized distributors?
All AT25160B-XHL-T 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 AT25160B-XHL-T meets industry standards.
7.What is the process for return or replacement of AT25160B-XHL-T?
All AT25160B-XHL-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25160B-XHL-T, 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 AT25160B-XHL-T part is unused and in its original packaging.
Return procedure for AT25160B-XHL-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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