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Microchip Technology 25LC160B-I/PG
- Part No.:
- 25LC160B-I/PG
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
25LC160B-I/PG.pdf
- Description:
- IC EEPROM 16KBIT SPI 10MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,283
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Product details
Overview
25LC160B-I/PG from Microchip Technology Inc. is a 16 Kbit (2048 × 8) SPI-compatible serial EEPROM with 32-byte page write capability, 10 MHz max clock frequency, and industrial temperature range (–40°C to +85°C). It operates from 2.5V to 5.5V and features hardware write protection via WP pin and STATUS register control, used for nonvolatile configuration storage in microcontroller-based embedded systems.
For engineers reviewing the 25LC160B-I/PG datasheet, 25LC160B-I/PG pinout, 25LC160B-I/PG application, or 25LC160B-I/PG equivalent, key selection criteria include page size (32 bytes), VCC range (2.5–5.5 V), endurance (1,000,000 cycles), data retention (>200 years), and HOLD/CS/SO/SI/SCK/WP/VSS/VCC interface compatibility with SPI master peripherals.
Technical Context
The 25LC160B-I/PG implements a standard SPI Mode 0,0 or Mode 1,1 interface with separate SI (data in) and SO (data out) lines, requiring CS assertion, SCK synchronization, and optional HOLD suspension. Its internal architecture includes an 8-bit instruction register, page latches, HV generator, and EEPROM array with automatic address incrementing during sequential reads.
Write operations require explicit WREN instruction before WRITE, followed by CS high to initiate self-timed internal write cycle (≤5 ms). Block protection is configurable via BP0/BP1 bits to lock 0%, 25%, 50%, or 100% of the 0000h–07FFh memory space, while WPEN bit enables hardware-level write disable when WP pin is low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 × 8-bit organization), directly addressable up to 07FFh |
| Page Size | 32 bytes - maximum contiguous data per single write command without crossing physical page boundary |
| Max Clock Frequency | 10 MHz at VCC ≥ 4.5 V - supports high-speed SPI communication in resource-constrained hosts |
| Write Cycle Time | ≤5 ms - self-timed internal erase/write; host must poll WIP bit or wait before next access |
| Endurance | 1,000,000 erase/write cycles - suitable for frequent parameter logging or calibration updates |
| Data Retention | >200 years at +25°C - ensures long-term reliability in unpowered storage applications |
| VCC Range | 2.5 V to 5.5 V - compatible with 3.3 V and 5 V logic domains without level shifting |
Pinout & Package
25LC160B-I/PG is packaged in 8-lead PDIP (Plastic Dual In-line Package) with 0.300-inch body width, RoHS-compliant matte tin lead finish, and standard through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select Input | Active-low enable: selects device on SPI bus; rising edge initiates internal write cycle after valid write sequence |
| SO (Pin 2) | Serial Data Output | Tri-state open-drain output; data shifted out MSB-first on SCK falling edge during READ/RDSR |
| WP (Pin 3) | Write-Protect Input | Hardware lock: disables STATUS register writes when WPEN=1 and WP=low; no effect on memory reads or active writes |
| VSS (Pin 4) | Ground Reference | Primary return path for all digital and internal charge-pump circuits; must be low-impedance |
| SI (Pin 5) | Serial Data Input | CMOS input receiving instructions, addresses, and data MSB-first on SCK rising edge |
| SCK (Pin 6) | Serial Clock Input | Synchronizes all SPI transfers; supports Mode 0,0 (CPOL=0, CPHA=0) and Mode 1,1 (CPOL=1, CPHA=1) |
| HOLD (Pin 7) | Hold Input | Pauses ongoing SPI transaction (e.g., mid-read/write) without resetting state; requires SCK=low to assert/deassert |
| VCC (Pin 8) | Supply Voltage | Power input for core logic and internal HV generator; bypass capacitor (0.1 µF) required near pin |
Key Features
| Feature | Design Value |
|---|---|
| 32-byte page write | Enables efficient burst programming of configuration data without multiple CS assertions, reducing SPI overhead |
| Block write protection | Four selectable protection levels (none / upper 1/4 / upper 1/2 / full array) prevent accidental firmware or calibration corruption |
| Built-in power-on write protection | Write enable latch resets at power-up, eliminating spurious writes during supply ramp-up or brown-out |
| HOLD pin support | Allows host MCU to service higher-priority interrupts mid-transaction without losing SPI context or reinitializing |
| Industrial temperature range | Guaranteed operation from –40°C to +85°C supports deployment in harsh environments like industrial controls and automotive ECUs |
Applications
| Industrial Sensor Calibration Storage | Embedded System Configuration Memory |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and linearization tables in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter repository accessed infrequently during boot or maintenance mode; SPI interface allows sharing bus with ADCs and DACs. Use Value: Enables field-upgradable calibration without firmware reflashing; 1M endurance supports recalibration over product lifetime. |
Use Scenario: Holding user-defined settings (e.g., display brightness, network IP, alarm thresholds) in medical infusion pumps. IC Role / Device Role / Timing Role: Persistent configuration store read at startup and written only on menu save; HOLD pin allows safe interruption during critical therapy delivery. Use Value: Prevents loss of clinical settings during power loss; hardware WP pin blocks unintended writes during ESD events. |
| Automotive Body Control Module (BCM) | Consumer Appliance State Memory |
Use Scenario: Recording door lock/unlock history, mirror position presets, and lighting profiles in 12 V automotive BCMs. IC Role / Device Role / Timing Role: SPI-connected memory co-located with 8-bit MCU; operates across –40°C to +85°C ambient with 2.5–5.5 V supply tolerance. Use Value: Survives cold cranking voltage dips; block protection prevents overwrite of safety-critical lock logic during firmware updates. |
Use Scenario: Saving cooking program parameters and child-lock status in smart ovens after power cycle. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced to ARM Cortex-M0+; standby current <1 µA extends battery backup life. Use Value: >200-year data retention ensures settings persist across appliance lifespan; 32-byte pages optimize write efficiency for multi-field recipes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 25AA160B-I/P | 1.8–5.5 V VCC range; identical 32-byte page, 10 MHz clock, and pinout | Supports lower-voltage systems (e.g., 1.8 V I/O domains); not rated for automotive temp range | Select when operating below 2.5 V or when extended voltage flexibility outweighs industrial temp guarantee |
| AT25160B-10PU-2.7 | Same 16 Kbit size and SPI interface; 2.7–5.5 V VCC; 64-byte page; 5 ms write time | Higher page capacity enables fewer transactions for large config blocks; different STATUS register layout | Choose for designs needing larger atomic writes or Atmel-compatible firmware abstraction layers |
Compared with 25LC160B-I/PG, 25AA160B-I/P offers wider voltage range but lacks automotive-grade thermal margin, while AT25160B-10PU-2.7 provides larger 64-byte pages but requires validation of STATUS register interaction and may need PCB layout review for timing margins.
Availability
25LC160B-I/PG is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, and automotive body control module applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant through-hole packaging.
Supply support for 25LC160B-I/PG 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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 25LC160B-I/PG belongs to Microchip's 25XX160 family of SPI serial EEPROMs, designed specifically for reliable, low-pin-count nonvolatile storage in cost-sensitive, space-constrained embedded systems.
FAQ
What is the maximum clock frequency supported by the 25LC160B-I/PG?
The 25LC160B-I/PG supports up to 10 MHz clock frequency when VCC is 4.5 V to 5.5 V. At 2.5 V ≤ VCC < 4.5 V, the maximum clock drops to 5 MHz, and at 1.8 V ≤ VCC < 2.5 V, it is 3 MHz. These limits ensure reliable setup/hold timing across voltage and temperature ranges as specified in DS21807D Table 1-2.
Does the 25LC160B-I/PG support page write operations, and what is the page size?
Yes, the 25LC160B-I/PG supports page write operations with a fixed 32-byte page size. This allows up to 32 bytes to be loaded into the page buffer before initiating the internal write cycle. Crossing a 32-byte boundary wraps data to the start of the same page, so software must enforce alignment to avoid unintended overwrites.
How does hardware write protection work on the 25LC160B-I/PG?
Hardware write protection on the 25LC160B-I/PG requires both the WPEN bit (bit 7 of STATUS register) to be set to '1' and the WP pin (Pin 3) driven low. When enabled, this blocks writes to the nonvolatile STATUS register bits (BP0, BP1, WPEN) but permits normal memory reads and writes. If WPEN = 0, the WP pin has no effect.
What is the endurance and data retention specification for the 25LC160B-I/PG?
The 25LC160B-I/PG is rated for 1,000,000 erase/write cycles and guarantees data retention exceeding 200 years at +25°C. These values are characterized and ensured per Microchip's Total Endurance™ model; actual field performance may vary with temperature and voltage stress conditions.
Can the 25LC160B-I/PG be used with SPI Mode 1,1, and how is HOLD functionality implemented?
Yes, the 25LC160B-I/PG supports both SPI Mode 0,0 (CPOL=0, CPHA=0) and Mode 1,1 (CPOL=1, CPHA=1). The HOLD pin suspends ongoing SPI communication when pulled low while SCK is low; SO, SI, and SCK enter high-impedance state, preserving internal state until HOLD is raised with SCK still low.
25LC160B-I/PG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
25LC160B-I/PG FAQ
1.How can I place an order for 25LC160B-I/PG through Aetrix?
Please submit a Request for Quotation (RFQ) for 25LC160B-I/PG 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 25LC160B-I/PG reliable?
The price and inventory of 25LC160B-I/PG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 25LC160B-I/PG is usually 5 days.
3.What payment methods are accepted for 25LC160B-I/PG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25LC160B-I/PG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25LC160B-I/PG?
25LC160B-I/PG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25LC160B-I/PG 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 25LC160B-I/PG?
For technical support, including 25LC160B-I/PG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25LC160B-I/PG requirements.
6.How does Aetrix verify that 25LC160B-I/PG is sourced from the original manufacturer or authorized distributors?
All 25LC160B-I/PG 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 25LC160B-I/PG meets industry standards.
7.What is the process for return or replacement of 25LC160B-I/PG?
All 25LC160B-I/PG units undergo pre-shipment inspection (PSI). If there is an issue with 25LC160B-I/PG, 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 25LC160B-I/PG part is unused and in its original packaging.
Return procedure for 25LC160B-I/PG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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