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Microchip Technology 25LC160B-E/SN
- Part No.:
- 25LC160B-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
25LC160B-E/SN.pdf
- Description:
- IC EEPROM 16KBIT SPI 10MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,797
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Product details
Overview
25LC160B-E/SN 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/automotive temperature support (–40°C to +125°C). It operates from 2.5V to 5.5V and features hardware write protection via WP pin and STATUS register control, used for nonvolatile parameter storage in microcontroller-based embedded systems.
For engineers reviewing the 25LC160B-E/SN datasheet, 25LC160B-E/SN pinout, 25LC160B-E/SN application, or 25LC160B-E/SN equivalent, this page delivers verified electrical specs, validated SOIC-8 pin mapping, real-world use cases in automotive and industrial control, and two confirmed alternative parts with documented functional and packaging differences.
Technical Context
The 25LC160B-E/SN implements a standard SPI Mode 0,0 interface with separate SI and SO lines, CS-controlled selection, and HOLD input for transaction suspension without reset. 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 (up to 32 bytes per page), self-timed erase/write cycles (≤5 ms), and configurable block write protection (none, 1/4, 1/2, or full array) via BP0/BP1 bits in the STATUS register. Write enable requires explicit WREN instruction and CS high transition to initiate internal programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 × 8-bit organization), sufficient for firmware configuration, calibration data, or device identity storage |
| Page Size | 32 bytes - enables efficient bulk writes within aligned boundaries; crossing page boundary wraps data to start of same page |
| Max Clock Frequency | 10 MHz at VCC ≥ 4.5V - supports high-speed SPI communication with modern MCUs without timing bottlenecks |
| Write Cycle Time | ≤5 ms - deterministic internal write completion time; allows predictable system-level timeout handling |
| Endurance & Retention | 1,000,000 erase/write cycles and >200 years data retention - suitable for long-life industrial deployments |
| Supply Voltage Range | 2.5V to 5.5V - compatible with both 3.3V and 5V logic domains without level shifting |
| Temperature Range | –40°C to +125°C (Automotive grade E) - qualified for under-hood and motor-control applications |
Pinout & Package
25LC160B-E/SN is packaged in 8-lead SOIC (SN), with 150 mil body width, RoHS-compliant matte tin finish, and JEDEC-standard footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select Input | Active-low enable; must go high after final data bit to trigger internal write cycle; deselects device and tri-states SO |
| SO (Pin 2) | Serial Data Output | CMOS-compatible output; data valid after SCK falling edge; enters high-impedance when CS high or HOLD low |
| WP (Pin 3) | Write-Protect Pin | Hardware lock for STATUS register when WPEN=1; no effect on memory writes unless WPEN set; enables field-safe configuration lockdown |
| VSS (Pin 4) | Ground Reference | Primary return path for all I/O and core circuitry; must be low-impedance connection to avoid noise-induced corruption |
| SI (Pin 5) | Serial Data Input | Latches data on SCK rising edge; accepts instructions, addresses, and write data; ignores transitions during HOLD low |
| SCK (Pin 6) | Serial Clock Input | Synchronizes all SPI transfers; rise edge clocks SI, fall edge updates SO; HOLD must be asserted only when SCK is low |
| HOLD (Pin 7) | Hold Input | Pauses ongoing SPI sequence (e.g., during MCU interrupt servicing); requires SCK low to activate/deactivate cleanly |
| VCC (Pin 8) | Supply Voltage | Power source for EEPROM core and I/O buffers; bypass capacitor (0.1 µF) required near pin for stable operation |
Key Features
| Feature | Design Value |
|---|---|
| 32-byte page write buffer | Reduces SPI transaction count by up to 32× vs. byte writes - critical for minimizing MCU active time in battery-powered systems |
| Hardware + software write protection | Combines WP pin and STATUS register (BP0/BP1/WPEN) to prevent accidental overwrites across power cycles and runtime events |
| HOLD pin with zero-cycle resume | Enables deterministic interruption of multi-byte reads/writes without re-synchronization - essential for real-time interrupt latency control |
| 10 MHz SPI interface | Supports full-speed operation with PIC® and other SPI-capable MCUs at 5V, enabling <1.3 ms full-array read (2048 bytes @ 10 MHz) |
| Automotive-grade qualification | Validated for –40°C to +125°C ambient operation and AEC-Q100 stress testing - suitable for engine control, ADAS, and powertrain modules |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing trim values, fault codes, and adaptive learning parameters that persist across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed via SPI during boot and runtime diagnostics. Use Value: Enables zero-latency parameter recall at startup and supports 1M+ update cycles over 15-year vehicle lifetime. |
Use Scenario: Holding user-defined I/O mapping, PID tuning constants, and safety interlock settings in modular control cabinets. IC Role / Device Role / Timing Role: SPI-configurable memory mapped into controller's peripheral address space for runtime read/write access. Use Value: Eliminates need for external backup batteries; retains settings through brownouts and firmware upgrades. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Parameters |
Use Scenario: Securing flow-rate calibration coefficients and usage logs subject to regulatory audit trails. IC Role / Device Role / Timing Role: Tamper-resistant storage element interfaced to ARM Cortex-M3/M4 via hardware SPI with CRC-checked transfers. Use Value: Meets IEC 62304 Class C requirements via write-protection granularity and >200-year data retention. |
Use Scenario: Storing tariff tables, metering constants, and cryptographic keys updated remotely over PLC or RF links. IC Role / Device Role / Timing Role: Secure parameter vault accessed only during authenticated firmware update windows. Use Value: Prevents unauthorized modification using dual-layer protection (WP pin + STATUS register lock). |
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 die, Industrial temp range (–40°C to +85°C); identical electrical specs and pinout | Not qualified for under-hood or powertrain locations requiring 125°C operation | Select 25LC160B-E/SN when ambient exceeds +85°C or AEC-Q100 compliance is mandatory |
| AT25160B-MAHL-T | 16 Kbit SPI EEPROM, 32-byte page, but rated only to +85°C; different STATUS register layout and WPEN behavior | Lacks automotive qualification; WP pin functionality differs - no hardware lock for STATUS register bits | Use only in commercial/industrial designs where extended temperature and strict write-locking are not required |
Compared with 25LC160B-I/SN and AT25160B-MAHL-T, the 25LC160B-E/SN uniquely combines automotive temperature rating, hardware-enforced STATUS register protection, and Microchip's proven 1M-cycle endurance - making it the sole choice for safety-critical, high-reliability deployments.
Availability
25LC160B-E/SN is available at Aetrix Electronics and suitable for automotive ECU development, industrial PLC commissioning, and medical device certification programs requiring stable component supply and long-term lifecycle assurance.
Supply support for 25LC160B-E/SN 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 infrastructure.
The 25LC160B-E/SN belongs to Microchip's 25XX160A/B serial EEPROM product line, designed specifically for robust, low-power, SPI-based nonvolatile storage in automotive, industrial, and medical applications demanding high reliability and extended temperature operation.
FAQ
What is the maximum clock frequency supported by the 25LC160B-E/SN?
The 25LC160B-E/SN supports up to 10 MHz SPI clock frequency when VCC is 4.5V to 5.5V. At 2.5V ≤ VCC < 4.5V, the maximum is 5 MHz, and at 1.8V ≤ VCC < 2.5V, it drops to 3 MHz. These limits are defined in Table 1-2 of the DS21807D datasheet and ensure reliable setup/hold timing across voltage and temperature ranges. The 25LC160B-E/SN does not support overclocking beyond these specifications.
Does the 25LC160B-E/SN require external pull-up resistors on its SPI lines?
No, the 25LC160B-E/SN does not require external pull-ups on SI, SO, SCK, or CS - all pins have CMOS-compatible input thresholds and actively driven outputs. However, a 0.1 µF ceramic bypass capacitor is mandatory between VCC and VSS, placed as close as possible to pins 4 and 8. Pull-ups may be added for bus contention management in multi-slave SPI configurations, but they are not part of the 25LC160B-E/SN's drive requirements.
How does page write operation work in the 25LC160B-E/SN?
The 25LC160B-E/SN has a 32-byte page buffer. During a page write, up to 32 sequential bytes can be loaded into the buffer before issuing the CS high transition that triggers the internal 5 ms write cycle. If the address crosses a 32-byte boundary (e.g., writing from 0x001F to 0x0020), data wraps to the start of the current page instead of advancing - a behavior explicitly documented in Section 2.3. This requires firmware to validate page alignment before initiating multi-byte writes to the 25LC160B-E/SN.
What is the function of the HOLD pin on the 25LC160B-E/SN?
The HOLD pin on the 25LC160B-E/SN suspends an ongoing SPI transaction (read or write) without resetting the internal state. When pulled low while SCK is low, SI/SO/SCK are tri-stated and ignored until HOLD returns high - allowing the host MCU to service higher-priority interrupts and resume exactly where it left off. This zero-cycle recovery behavior is unique to the 25LC160B-E/SN among legacy SPI EEPROMs and eliminates retransmission overhead.
Can the 25LC160B-E/SN be used in a 1.8V system?
No, the 25LC160B-E/SN is not rated for 1.8V operation. Its specified VCC range is 2.5V to 5.5V, as confirmed in the Device Selection Table and Electrical Characteristics section of DS21807D. For 1.8V systems, Microchip offers the 25AA160B variant (1.8–5.5V), which shares the same 32-byte page size and pinout but uses different internal charge pump design. Using 25LC160B-E/SN below 2.5V risks unreliable write cycles and undefined read behavior.
25LC160B-E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
25LC160B-E/SN FAQ
1.How can I place an order for 25LC160B-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 25LC160B-E/SN 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-E/SN reliable?
The price and inventory of 25LC160B-E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 25LC160B-E/SN is usually 5 days.
3.What payment methods are accepted for 25LC160B-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25LC160B-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25LC160B-E/SN?
25LC160B-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25LC160B-E/SN 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-E/SN?
For technical support, including 25LC160B-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25LC160B-E/SN requirements.
6.How does Aetrix verify that 25LC160B-E/SN is sourced from the original manufacturer or authorized distributors?
All 25LC160B-E/SN 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-E/SN meets industry standards.
7.What is the process for return or replacement of 25LC160B-E/SN?
All 25LC160B-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 25LC160B-E/SN, 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-E/SN part is unused and in its original packaging.
Return procedure for 25LC160B-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
25LC160B-E/SN Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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