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Microchip Technology 25LC160BT-I/MS
- Part No.:
- 25LC160BT-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
25LC160BT-I/MS.pdf
- Description:
- IC EEPROM 16KBIT SPI 10MHZ 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,759
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Product details
Overview
25LC160BT-I/MS from Microchip Technology Inc. is a 16 Kbit (2048 × 8) SPI Serial EEPROM with 32-byte page size, rated for industrial temperature range (–40°C to +85°C), operating from 2.5V to 5.5V supply, and supporting up to 10 MHz clock frequency. It features hardware write protection via WP pin, HOLD functionality for bus pause, and block-level array protection (none/1/4/1/2/all). It is used in embedded systems for firmware parameter storage, calibration data retention, and configuration backup.
For engineers reviewing the 25LC160BT-I/MS datasheet, 25LC160BT-I/MS pinout, 25LC160BT-I/MS application, or 25LC160BT-I/MS equivalent, key selection criteria include page size compatibility (32-byte), VCC min/max (2.5–5.5V), industrial temp rating, MSOP-8 packaging, and SPI timing compliance at 10 MHz under 4.5–5.5V conditions.
Technical Context
The 25LC160BT-I/MS implements a standard SPI Mode 0,0 interface with separate SI (data-in) and SO (data-out) lines, requiring CS assertion, SCK synchronization, and optional HOLD/HPIN control. Its internal architecture includes an 8-bit instruction register, page latches, and high-voltage generator for EEPROM programming.
It supports byte and page write operations limited to 32-byte boundaries, with automatic address rollover during sequential read and self-timed 5 ms max internal write cycles. Write enable latch (WEL) must be set via WREN instruction prior to any write, and STATUS register (RDSR/WRSR) enables nonvolatile BP0/BP1 block protection and WPEN-controlled hardware write protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 × 8 bits), sufficient for storing boot configuration, sensor calibration tables, or device ID data in resource-constrained microcontrollers. |
| Page Size | 32 bytes - defines maximum contiguous write length per CS cycle; crossing page boundary wraps data within same page, requiring software boundary management. |
| Max Clock Frequency | 10 MHz at VCC ≥ 4.5V - enables fast read/write throughput (up to ~1.25 MB/s theoretical serial bandwidth) without external clock dividers. |
| Write Cycle Time | 5 ms maximum - determines minimum time between write commands; impacts real-time logging latency and system responsiveness during nonvolatile updates. |
| Endurance | 1,000,000 erase/write cycles - supports frequent field-updatable parameters (e.g., energy meter kWh counters, motor runtime logs) over multi-year product life. |
| Data Retention | Greater than 200 years at +25°C - ensures long-term reliability of stored calibration coefficients, security keys, or regulatory compliance records without refresh. |
| VCC Range | 2.5V to 5.5V - compatible with both 3.3V and 5V logic domains, simplifying integration into mixed-voltage industrial control boards. |
Pinout & Package
25LC160BT-I/MS is housed in an 8-lead MSOP package (150 mil width), with gull-wing leads, RoHS-compliant matte tin finish, and thermal pad not electrically connected. Pin pitch is 0.5 mm; body dimensions are 3.0 mm × 3.0 mm × 1.1 mm (max height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select Input | Active-low enable: drives device into active mode only when low; forces SO to high-impedance when high, enabling multi-drop SPI bus sharing. |
| SO (Pin 2) | Serial Data Output | Tri-state output delivering memory contents on falling edge of SCK; high-impedance when CS high or HOLD low. |
| WP (Pin 3) | Write-Protect Pin | Hardware lock: when WP = low and WPEN bit = 1, disables writes to STATUS register nonvolatile bits; no effect on memory array writes unless combined with BP bits. |
| VSS (Pin 4) | Ground Reference | Primary return path for all internal circuitry and I/O; requires low-impedance connection to system ground plane to maintain noise immunity and timing integrity. |
| SI (Pin 5) | Serial Data Input | CMOS input accepting instructions (e.g., 0x02 for WRITE), addresses, and data on rising edge of SCK; sampled after CS goes low. |
| SCK (Pin 6) | Serial Clock Input | Synchronizes all data transfers; rising edge latches SI, falling edge updates SO; max 10 MHz rate requires controlled trace impedance and minimal skew. |
| HOLD (Pin 7) | Hold Input | Pauses ongoing SPI transaction when pulled low (must occur while SCK is low); allows host MCU to service higher-priority interrupts without reinitializing communication. |
| VCC (Pin 8) | Supply Voltage | Power source for core logic and EEPROM array; requires local 0.1 µF ceramic decoupling placed ≤2 mm from pin to suppress switching noise and ensure stable write operation. |
Key Features
| Feature | Design Value |
|---|---|
| 32-byte page write capability | Enables efficient bulk parameter updates (e.g., full sensor offset table) in single SPI transaction, reducing host CPU overhead vs. byte-by-byte writes. |
| Block write protection (BP0/BP1) | Allows selective locking of upper 1/4, 1/2, or entire memory array (0600h–07FFh, 0400h–07FFh, or 0000h–07FFh) to prevent accidental firmware corruption during field upgrades. |
| HOLD pin with deterministic timing | Supports interrupt-safe SPI communication: HOLD setup/hold times (20–80 ns) guarantee atomic pause/resume without clock stretching or bus arbitration logic. |
| Power-on write disable | Ensures zero-risk startup: write enable latch resets at power-up, preventing spurious writes due to floating CS or noisy reset sequences. |
| ESD robustness (>4 kV HBM) | Meets IEC 61000-4-2 Level 2 requirements, enabling direct PCB mounting in industrial environments with frequent operator handling or cable hot-plug events. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Backup |
|---|---|
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Nonvolatile configuration register providing deterministic boot-time parameter recovery after power loss or firmware update. Use Value: Eliminates need for battery-backed SRAM; 200+ year data retention ensures calibration validity across equipment lifecycle without maintenance. |
Use Scenario: Archiving factory-calibrated sensor gain/offset values and user-adjusted therapy settings in portable infusion pumps and ECG monitors. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter vault accessed only during initialization or authorized service mode via authenticated SPI command sequence. Use Value: Meets IEC 62304 Class C software safety requirements by guaranteeing parameter persistence through 1M write cycles and >200-year retention. |
| Automotive Body Control Module (BCM) | Smart Energy Meter Firmware Settings |
Use Scenario: Holding door lock actuation history, mirror position presets, and lighting profiles in automotive BCMs operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Industrial-temp-rated EEPROM interfacing directly with 3.3V CAN microcontroller SPI port, surviving automotive load dump transients via internal charge pump regulation. Use Value: Qualified to AEC-Q100 stress test standards (implied by E-grade availability of family); 2.5–5.5V VCC range accommodates wide battery voltage swings (9–16V). |
Use Scenario: Recording tariff schedules, demand response event logs, and cryptographic key seeds in ANSI C12.20-certified revenue meters deployed in utility substations. IC Role / Device Role / Timing Role: High-reliability data logger with 5 ms write cycle and hardware WP pin, ensuring meter configuration survives grid fault-induced brownouts. Use Value: 1M endurance supports daily firmware patching over 27 years; block protection prevents unauthorized modification of billing algorithms during field servicing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 25LC160B-I/SN | Same 16 Kbit capacity, 32-byte page, and 2.5–5.5V VCC, but in SOIC-8 package (5.3 mm width vs. MSOP's 3.0 mm); slightly higher ICC Read (6 mA vs. 2.5 mA at 5.5V/10 MHz). | Preferred where board space permits larger footprint and hand-soldering or legacy SOIC reflow profiles are used. | Select 25LC160B-I/SN if PCB layout lacks MSOP land pattern or requires compatibility with existing SOIC-based test fixtures. |
| AT25160B-MAHL-T | 16 Kbit SPI EEPROM with identical 32-byte page and 2.5–5.5V range, but supports 20 MHz max clock and includes additional deep power-down mode (0.5 µA ICCS). | Better suited for ultra-low-power battery-operated devices requiring sub-µA sleep current and faster burst reads. | Choose AT25160B-MAHL-T only if design demands >10 MHz throughput or <1 µA standby current; verify HOLD timing compatibility (Microchip uses 20–80 ns setup, Atmel specifies 15 ns). |
Compared with 25LC160BT-I/MS, the 25LC160B-I/SN offers identical electrical behavior in a larger SOIC package ideal for prototyping, while the AT25160B-MAHL-T provides higher speed and lower standby current at the cost of different timing margins and vendor-specific command set nuances.
Availability
25LC160BT-I/MS is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, automotive body electronics, and smart metering applications requiring stable component supply, long-term obsolescence management, and RoHS-compliant sourcing.
Supply support for 25LC160BT-I/MS 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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory products, with global manufacturing and quality certifications including ISO 9001 and IATF 16949.
The 25LC160BT-I/MS belongs to Microchip's 25XX160A/B Serial EEPROM product line, designed specifically for reliable, low-pin-count nonvolatile storage in cost-sensitive, space-constrained embedded systems requiring SPI interface simplicity and industrial-grade reliability.
FAQ
What is the maximum clock frequency supported by the 25LC160BT-I/MS, and under what voltage conditions?
The 25LC160BT-I/MS supports a maximum clock frequency of 10 MHz when VCC is between 4.5V and 5.5V. At 2.5V ≤ VCC < 4.5V, the maximum clock drops to 5 MHz, and no specification is provided below 2.5V. These limits are defined in Table 1-2 AC Characteristics and must be observed to ensure reliable data sampling and setup/hold timing compliance. The 25LC160BT-I/MS does not operate at 10 MHz across its full 2.5–5.5V range.
Does the 25LC160BT-I/MS support page write operations, and what is the page size?
Yes, the 25LC160BT-I/MS supports page write operations with a fixed 32-byte page size, as confirmed in the Device Selection Table and functional description (Section 2.3). This means up to 32 bytes can be written in a single CS-active transaction, provided all addresses fall within the same physical page boundary (e.g., 0x0000–0x001F). Attempting to cross a page boundary causes wraparound within the current page. The 25LC160BT-I/MS is a 'B' version device, distinguishing it from the 16-byte-page 'A' variants.
How does hardware write protection work on the 25LC160BT-I/MS, and what pins/functions are involved?
Hardware write protection on the 25LC160BT-I/MS requires both the WP pin (Pin 3) to be driven low AND the WPEN bit (bit 7 of STATUS register) to be set high. When both conditions are met, writes to the nonvolatile bits of the STATUS register (BP0, BP1, WPEN) are disabled; memory array writes remain permitted unless blocked by BP bits. If WP is high or WPEN is low, hardware protection is inactive. This dual-control mechanism allows safe field programming even when WP is permanently grounded.
What is the purpose of the HOLD pin on the 25LC160BT-I/MS, and what are its timing requirements?
The HOLD pin on the 25LC160BT-I/MS suspends an ongoing SPI transaction without resetting the internal state, allowing the host microcontroller to service urgent interrupts and resume communication seamlessly. To activate HOLD, the pin must be pulled low while SCK is low; deactivation requires bringing HOLD high while SCK remains low. Setup time ranges from 20 ns (VCC ≥ 4.5V) to 80 ns (VCC < 2.5V), as specified in Table 1-2, Parameter 16 (THS). The 25LC160BT-I/MS enters high-impedance on SI/SO during HOLD.
What temperature range is guaranteed for the 25LC160BT-I/MS, and how is this indicated in the part number?
The 25LC160BT-I/MS is rated for the industrial temperature range of –40°C to +85°C, as denoted by the 'I' suffix in the part number. This is explicitly stated in the Device Selection Table and Electrical Characteristics section (Table 1-1), where DC and AC parameters are validated across this ambient range at VCC = 2.5V to 5.5V. The 'T' indicates tape-and-reel packaging, and 'MS' specifies the 8-lead MSOP package variant. No automotive (–40°C to +125°C) qualification is claimed for this specific marking.
25LC160BT-I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
25LC160BT-I/MS FAQ
1.How can I place an order for 25LC160BT-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 25LC160BT-I/MS 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 25LC160BT-I/MS reliable?
The price and inventory of 25LC160BT-I/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 25LC160BT-I/MS is usually 5 days.
3.What payment methods are accepted for 25LC160BT-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25LC160BT-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25LC160BT-I/MS?
25LC160BT-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25LC160BT-I/MS 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 25LC160BT-I/MS?
For technical support, including 25LC160BT-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25LC160BT-I/MS requirements.
6.How does Aetrix verify that 25LC160BT-I/MS is sourced from the original manufacturer or authorized distributors?
All 25LC160BT-I/MS 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 25LC160BT-I/MS meets industry standards.
7.What is the process for return or replacement of 25LC160BT-I/MS?
All 25LC160BT-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 25LC160BT-I/MS, 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 25LC160BT-I/MS part is unused and in its original packaging.
Return procedure for 25LC160BT-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
25LC160BT-I/MS Tags
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