My Inquiry
My Account
Microchip Technology 25LC160AT-E/SN
- Part No.:
- 25LC160AT-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
25LC160AT-E/SN.pdf
- Description:
- IC EEPROM 16KBIT SPI 10MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,952
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
25LC160AT-E/SN from Microchip Technology Inc. is a 16 Kbit (2048 × 8) SPI Serial EEPROM with 16-byte page size, 2.5–5.5 V supply range, and industrial/automotive temperature support (−40°C to +125°C). It features hardware write protection via WP pin, HOLD functionality for bus arbitration, and self-timed 5 ms max write cycles - deployed in automotive body control modules for configuration storage and calibration data retention.
For engineers reviewing the 25LC160AT-E/SN datasheet, 25LC160AT-E/SN pinout, 25LC160AT-E/SN application, or 25LC160AT-E/SN equivalent, key selection criteria include page-write boundary handling, WPEN-controlled hardware write-protection behavior, HOLD timing compliance at 1.8–5.5 V, and automotive-grade endurance (1M cycles, >200-year data retention).
Technical Context
The 25LC160AT-E/SN implements a standard SPI Mode 0,0 interface with separate SI/SO lines, requiring CS low and HOLD high for normal operation. Its internal architecture includes an 8-bit instruction register, page latches, and HV generator for EEPROM programming.
Write operations require explicit WREN instruction followed by CS high after final data bit; status polling via RDSR (WIP/WEL bits) is supported during writes. Block protection is configurable via BP0/BP1 bits to lock 0%, 25%, 50%, or 100% of the 0000h–07FFh address space.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 × 8), directly addressable up to 07FFh |
| Page Size | 16 bytes - page write must not cross 0000h/0010h/0020h… boundaries |
| Max Clock Frequency | 10 MHz at VCC ≥ 4.5 V - dictates maximum SPI throughput in host firmware |
| Write Cycle Time | 5 ms max - defines minimum delay before read or next write command |
| Endurance & Retention | 1,000,000 erase/write cycles; >200 years data retention - validated for automotive ECU lifetime |
| Supply Voltage Range | 2.5–5.5 V - compatible with 3.3 V and 5 V microcontroller I/O domains |
| Temperature Range | −40°C to +125°C (Automotive E grade) - qualified per AEC-Q100 stress test conditions |
Pinout & Package
8-lead SOIC package (SN suffix), 3.9 mm × 4.9 mm body, 1.27 mm pitch, RoHS-compliant matte tin finish.
| 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 |
| SO (Pin 2) | Serial Data Output | Tri-state open-drain output - transitions on SCK falling edge during read |
| WP (Pin 3) | Write-Protect Pin | Hardware lock for STATUS register when WPEN=1 - prevents accidental BP bit changes |
| VSS (Pin 4) | Ground Reference | Return path for all I/O and core logic - requires low-impedance PCB connection |
| SI (Pin 5) | Serial Data Input | Latches data/instructions on SCK rising edge - supports MSB-first SPI framing |
| SCK (Pin 6) | Serial Clock Input | Synchronizes all transfers - timing parameters defined per VCC voltage tier |
| HOLD (Pin 7) | Hold Input | Pauses ongoing SPI transfer without reset - requires setup/hold times relative to SCK |
| VCC (Pin 8) | Supply Voltage | Power for EEPROM array and interface logic - bypass capacitor required per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Block Write Protection | Configurable via BP0/BP1 bits to protect 0%, 25%, 50%, or 100% of memory - enables secure boot loader partitioning |
| Built-in Power-On Write Protection | Write enable latch resets at power-up - prevents spurious writes during brown-out or reset |
| HOLD Functionality | Halts serial communication mid-sequence while preserving internal state - allows host MCU to service higher-priority interrupts |
| ESD Robustness | 4 kV HBM rating - meets automotive system-level ESD immunity requirements without external protection |
| Low-Power Standby | 1 μA max ICCS at 2.5 V - suitable for always-on vehicle modules with strict quiescent current budgets |
Applications
| Automotive Body Control Unit (BCU) | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles across ignition cycles in a Class 4 BCU. IC Role / Device Role / Timing Role: Nonvolatile configuration register - accessed via SPI during startup and runtime parameter updates. Use Value: 16-byte page writes enable atomic storage of multi-parameter sets; automotive temp grade ensures reliability under hood thermal cycling. | Use Scenario: Retaining I/O mapping tables, PID tuning constants, and calibration offsets after factory commissioning and field reconfiguration. IC Role / Device Role / Timing Role: Field-programmable parameter vault - written during setup mode, read during scan cycle execution. Use Value: Hardware WP pin + BP bits prevent unauthorized runtime modification; 1M endurance supports decades of maintenance cycles. |
| Medical Infusion Pump Settings | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Securing drug library definitions, dose limits, and alarm thresholds subject to regulatory audit trails. IC Role / Device Role / Timing Role: Certified data integrity anchor - write-protected segments store immutable safety-critical values. Use Value: BP1/BP0 locking of upper 1/2 memory (0400h–07FFh) isolates certified parameters from user-modifiable fields. | Use Scenario: Storing delta patches for firmware updates in utility-grade meters deployed in remote substations. IC Role / Device Role / Timing Role: Field-upgradable code repository - accessed only during secure OTA update windows. Use Value: HOLD pin enables deterministic interrupt response during patch application; 5 ms write time aligns with meter's real-time scheduling constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 25LC160BT-E/SN | 32-byte page size vs. 16-byte; identical pinout, voltage, temp, and instruction set | Enables larger atomic writes but requires firmware adjustment to avoid page-boundary wraparound | Select when application benefits from reduced write transaction count per 32-byte data block |
| AT25DF021-SSH-T | 2 Mbit density, SPI DUAL/QUAD mode support, 85 MHz max clock, different instruction set and status register layout | Higher bandwidth and density for firmware storage; lacks HOLD pin and hardware WP pin | Choose for boot code storage where speed and capacity outweigh need for HOLD/WP hardware controls |
Compared with 25LC160AT-E/SN, the 25LC160BT-E/SN offers double the page buffer for fewer write commands but demands stricter address alignment; AT25DF021-SSH-T provides flash-like density and speed but removes critical hardware safety features (HOLD, WP pin), making it unsuitable for safety-critical parameter storage.
Availability
25LC160AT-E/SN is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and medical device design requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for 25LC160AT-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 operations.
The 25LC160A/B family was designed specifically for automotive and industrial applications requiring robust, low-power, SPI-compatible nonvolatile memory with hardware write protection and extended temperature operation.
FAQ
What is the page size of the 25LC160AT-E/SN and why does it matter for firmware design?
The 25LC160AT-E/SN has a fixed 16-byte page size. This means any page write operation must stay within a single 16-byte boundary (e.g., addresses 0000h–000Fh); crossing into the next page causes wraparound and overwrites earlier bytes in the same page. Firmware must validate address alignment before initiating page writes to prevent data corruption - a critical constraint in automotive calibration storage where atomicity is required.
How does the HOLD pin function on the 25LC160AT-E/SN during active SPI communication?
The HOLD pin on the 25LC160AT-E/SN suspends ongoing SPI transfers without resetting internal state. When pulled low while SCK is low, SI/SO/SCK inputs are ignored and SO enters high-impedance. Communication resumes upon HOLD returning high while SCK remains low. This enables the host MCU to service time-critical interrupts (e.g., CAN frame reception) and return seamlessly to EEPROM access - a key feature for real-time automotive systems using the 25LC160AT-E/SN.
Can the 25LC160AT-E/SN be used in 1.8 V systems?
No. The 25LC160AT-E/SN is rated for 2.5–5.5 V operation only. For 1.8 V systems, Microchip's 25AA160A/B series (e.g., 25AA160AT-I/SN) supports 1.8–5.5 V and shares identical pinout and instruction set, but the 25LC160AT-E/SN lacks guaranteed functionality below 2.5 V and must not be operated outside its specified supply range.
What is the role of the WP pin and WPEN bit in protecting memory on the 25LC160AT-E/SN?
On the 25LC160AT-E/SN, the WP pin enables hardware write protection only when the WPEN bit (STATUS register bit 7) is set to 1. When WP is low and WPEN = 1, writes to nonvolatile STATUS register bits (BP0/BP1/WPEN) are blocked - preventing accidental changes to memory protection settings. If WPEN = 0, the WP pin is ignored, allowing full STATUS register writes even with WP grounded - a deliberate design for flexible system integration.
Is the 25LC160AT-E/SN compliant with AEC-Q100 for automotive use?
The 25LC160AT-E/SN is qualified to Automotive Grade E (−40°C to +125°C) per Microchip's internal qualification standards aligned with AEC-Q100 stress test conditions. While not formally AEC-Q100 certified as a standalone component, its E-grade temperature rating, 1M endurance, and 200-year data retention meet typical automotive ECU requirements for non-safety-critical configuration storage - confirmed in DS21807D revision D.
25LC160AT-E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
25LC160AT-E/SN FAQ
1.How can I place an order for 25LC160AT-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 25LC160AT-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 25LC160AT-E/SN reliable?
The price and inventory of 25LC160AT-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 25LC160AT-E/SN is usually 5 days.
3.What payment methods are accepted for 25LC160AT-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25LC160AT-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25LC160AT-E/SN?
25LC160AT-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25LC160AT-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 25LC160AT-E/SN?
For technical support, including 25LC160AT-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25LC160AT-E/SN requirements.
6.How does Aetrix verify that 25LC160AT-E/SN is sourced from the original manufacturer or authorized distributors?
All 25LC160AT-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 25LC160AT-E/SN meets industry standards.
7.What is the process for return or replacement of 25LC160AT-E/SN?
All 25LC160AT-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 25LC160AT-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 25LC160AT-E/SN part is unused and in its original packaging.
Return procedure for 25LC160AT-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
25LC160AT-E/SN Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
