My Inquiry
My Account
Microchip Technology 25LC128T-E/SN16KVAO
- Part No.:
- 25LC128T-E/SN16KVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
25LC128T-E/SN16KVAO.pdf
- Description:
- IC EEPROM 128KBIT SPI 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,264
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
25LC128T-E/SN16KVAO from Microchip Technology Inc. is a 128 Kbit SPI Serial EEPROM with 16,384 × 8-bit organization, 64-byte page size, and extended temperature operation from –40°C to +125°C. It supports up to 10 MHz clock frequency at 4.5–5.5 V, features hardware write protection via WP pin and STATUS register, and delivers 1,000,000 erase/write cycles with >200 years data retention - used in automotive engine control units for calibration storage.
For engineers reviewing the 25LC128T-E/SN16KVAO datasheet, 25LC128T-E/SN16KVAO pinout, 25LC128T-E/SN16KVAO application, or 25LC128T-E/SN16KVAO equivalent, key selection criteria include VCC range (2.5–5.5 V), extended-temp AEC-Q100 qualification, SPI interface timing compliance, block-level write protection granularity, and SOIC-8 (SN) package compatibility with IPC-7351 land patterns.
Technical Context
The 25LC128T-E/SN16KVAO implements a standard SPI Mode 0,0 (CPOL=0, CPHA=0) interface with separate SI and SO lines, requiring CS assertion, SCK synchronization, and optional HOLD suspension. Its internal architecture includes a 64-byte page latch, HV generator for EEPROM programming, and status register with WIP, WEL, BP0/BP1, and WPEN bits.
Write operations require explicit WREN instruction followed by CS high-to-low transition to initiate self-timed internal write cycle (≤5 ms). Block protection is configurable via BP0/BP1 to lock none, upper 1/4 (3000h–3FFFh), upper 1/2 (2000h–3FFFh), or full array (0000h–3FFFh), while hardware write protection engages only when WP is low and WPEN is set.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 128 Kbit (16,384 × 8-bit), enabling storage of firmware patches or sensor calibration tables in space-constrained ECUs. |
| Interface | SPI-compatible serial bus (Mode 0,0), eliminating parallel bus routing and reducing MCU GPIO count. |
| Max Clock Frequency | 10 MHz at VCC ≥ 4.5 V - supports fast read/write in real-time control loops without CPU polling overhead. |
| Write Cycle Time | ≤5 ms per page - deterministic latency for critical configuration updates during power-down sequences. |
| Endurance & Retention | 1,000,000 erase/write cycles and >200 years data retention - meets ASIL-B functional safety requirements for automotive nonvolatile storage. |
| Operating Temperature | –40°C to +125°C (Extended grade), qualified to AEC-Q100 Rev G Grade 1 - validated for under-hood deployment. |
| VCC Range | 2.5 V to 5.5 V - interoperable with 3.3 V and 5 V logic domains without level-shifting circuitry. |
Pinout & Package
25LC128T-E/SN16KVAO is packaged in an 8-lead narrow SOIC (SN) per Microchip Drawing C04-057-SN Rev D, with 1.27 mm pitch, 3.90 mm body width, and recommended IPC-7351 land pattern C04-2057-SN Rev B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low enable; forces SO into high-impedance state when deasserted, enabling multi-device SPI bus sharing. |
| SO | Serial Data Output | Tri-state output; data shifted out on SCK falling edge - requires external pull-up if shared with other SO lines. |
| WP | Write-Protect Pin | Hardware lock for STATUS register nonvolatile bits when WPEN = 1; no effect on array writes unless BP bits are set. |
| VSS | Ground | Reference return path for all I/O and core logic; must be low-impedance connection to minimize noise coupling into EEPROM array. |
| SI | Serial Data Input | Data latched on SCK rising edge; accepts instructions (READ/WRITE/RDSR), addresses, and payload bytes MSB-first. |
| SCK | Serial Clock Input | Master-generated clock; timing-critical path requiring controlled impedance trace and <100 ns rise/fall times per AC specs. |
| HOLD | Hold Input | Suspends ongoing SPI transaction without reset; must be asserted while SCK is low to avoid bus contention or data corruption. |
| VCC | Supply Voltage | 2.5–5.5 V power rail; decoupling capacitor (0.1 µF X7R) required within 5 mm of VCC/VSS pins to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Page Write Capability | 64-byte page buffer enables burst writes within single physical page boundaries - reduces total write time vs. byte-by-byte programming. |
| Block Write Protection | BP0/BP1 bits allow selective locking of 0%, 25%, 50%, or 100% of memory - prevents accidental overwrites of boot code or safety-critical parameters. |
| Power-On Write Protection | Write enable latch resets at power-up and after each WRITE/WRSR command - eliminates spurious writes during brown-out conditions. |
| HOLD Function | Pauses active SPI sequence without reinitialization - allows host MCU to service higher-priority interrupts while preserving transaction state. |
| AEC-Q100 Qualification | Qualified to Grade 1 (–40°C to +125°C) per AEC-Q100 Rev G - certified for automotive powertrain, chassis, and ADAS applications. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing fuel map calibration data and fault logs subject to frequent updates during vehicle operation and diagnostics. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced directly to PIC® MCU SPI port; accessed during startup and runtime reprogramming. Use Value: 1,000,000 endurance cycles support lifetime recalibration events; extended temperature rating ensures reliability in under-hood environments. |
Use Scenario: Retaining I/O module configuration, ladder logic parameters, and network settings across power cycles in factory automation systems. IC Role / Device Role / Timing Role: SPI EEPROM providing persistent storage for user-defined control logic; accessed via ARM Cortex-M SPI peripheral. Use Value: Hardware write protection (WP + BP bits) prevents unauthorized firmware tampering; 5 µA standby current extends battery backup duration. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Patching |
Use Scenario: Holding dose accuracy calibration coefficients and usage history in Class II medical devices requiring regulatory traceability. IC Role / Device Role / Timing Role: Secure parameter storage with write-protection enforced during normal operation; accessed only during service mode. Use Value: >200 years data retention satisfies FDA 21 CFR Part 11 long-term recordkeeping; RoHS-compliant materials meet ISO 13485 requirements. |
Use Scenario: Storing field-upgradable firmware patches and tariff tables in utility-grade electricity meters deployed in outdoor enclosures. IC Role / Device Role / Timing Role: Field-programmable memory supporting remote OTA updates via isolated RS-485 interface and microcontroller SPI bridge. Use Value: 10 MHz max clock enables rapid patch loading; AEC-Q100 qualification validates performance across –40°C to +85°C ambient extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25DF041A-SSH-T | 4 Mbit density, quad SPI interface, 85 MHz max clock; no HOLD pin; different STATUS register layout. | Higher bandwidth for firmware image storage; lacks HOLD functionality needed for interrupt-safe transactions. | Select when larger capacity and faster read throughput outweigh need for HOLD and automotive qualification. |
| BR25L128FJ-WE2 | 128 Kbit, SPI interface, –40°C to +105°C; built-in error correction (ECC); 3.0–3.6 V VCC range only. | Enhanced data integrity for safety-critical logging; narrower supply range limits use with 5 V systems. | Choose for applications requiring ECC and industrial temp range where 5 V compatibility is not required. |
Compared with AT25DF041A-SSH-T and BR25L128FJ-WE2, the 25LC128T-E/SN16KVAO uniquely combines AEC-Q100 Grade 1 qualification, HOLD pin support for deterministic interrupt handling, and 2.5–5.5 V operation - making it optimal for automotive and mixed-voltage industrial designs requiring robust, interrupt-safe nonvolatile storage.
Availability
25LC128T-E/SN16KVAO is available at Aetrix Electronics and suitable for automotive ECU development, industrial PLC configuration, medical device calibration, and smart meter firmware patching requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 25LC128T-E/SN16KVAO 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 25LC128T-E/SN16KVAO belongs to Microchip's 25XX128 family of SPI Serial EEPROMs, designed specifically for automotive, industrial, and medical applications demanding high reliability, extended temperature operation, and robust data integrity under electrical stress.
FAQ
What is the operating voltage range for the 25LC128T-E/SN16KVAO?
The 25LC128T-E/SN16KVAO operates from 2.5 V to 5.5 V DC. This dual-voltage capability allows direct integration with both 3.3 V and 5 V microcontroller systems without level-shifting circuitry. At 2.5–4.4 V, maximum clock frequency is reduced to 5 MHz; full 10 MHz operation is supported only at 4.5–5.5 V. The device remains fully functional across its entire specified VCC range.
Does the 25LC128T-E/SN16KVAO support hardware write protection?
Yes, the 25LC128T-E/SN16KVAO supports hardware write protection through the combination of the WP pin and the WPEN bit in the STATUS register. When WP is held low and WPEN is set to 1, writes to nonvolatile STATUS register bits are disabled. Array-level protection is controlled separately via BP0/BP1 bits. This dual-layer mechanism prevents accidental modification of critical configuration data in automotive and industrial environments.
What package type is used for the 25LC128T-E/SN16KVAO?
The 25LC128T-E/SN16KVAO uses an 8-lead narrow SOIC package (SN), per Microchip Drawing C04-057-SN Rev D. It has a 1.27 mm lead pitch, 3.90 mm body width, and 4.90 mm overall length. The package is RoHS-compliant, halogen-free, and compatible with standard reflow profiles including J-STD-020D. Land pattern C04-2057-SN Rev B is recommended for reliable solder joint formation.
How many write/erase cycles does the 25LC128T-E/SN16KVAO guarantee?
The 25LC128T-E/SN16KVAO guarantees 1,000,000 erase/write cycles per memory location at 25°C and VCC = 5.5 V. Endurance is characterized per JEDEC Standard JESD22-A117 and validated across the full operating temperature range. Real-world endurance may vary based on voltage, temperature, and write pattern; Microchip's Total Endurance™ Model provides application-specific estimates.
Is the 25LC128T-E/SN16KVAO qualified for automotive applications?
Yes, the 25LC128T-E/SN16KVAO is AEC-Q100 qualified to Grade 1 (–40°C to +125°C), meeting the stress test requirements for automotive powertrain, chassis, and body electronics. It undergoes rigorous testing for temperature cycling, humidity bias, ESD (>4 kV HBM), and mechanical shock. The "E" suffix in the part number explicitly denotes Extended temperature grade compliance.
25LC128T-E/SN16KVAO 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:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 128Kbit
- Memory Organization:
- 16K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 5 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
25LC128T-E/SN16KVAO FAQ
1.How can I place an order for 25LC128T-E/SN16KVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for 25LC128T-E/SN16KVAO 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 25LC128T-E/SN16KVAO reliable?
The price and inventory of 25LC128T-E/SN16KVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 25LC128T-E/SN16KVAO is usually 5 days.
3.What payment methods are accepted for 25LC128T-E/SN16KVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25LC128T-E/SN16KVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25LC128T-E/SN16KVAO?
25LC128T-E/SN16KVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25LC128T-E/SN16KVAO 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 25LC128T-E/SN16KVAO?
For technical support, including 25LC128T-E/SN16KVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25LC128T-E/SN16KVAO requirements.
6.How does Aetrix verify that 25LC128T-E/SN16KVAO is sourced from the original manufacturer or authorized distributors?
All 25LC128T-E/SN16KVAO 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 25LC128T-E/SN16KVAO meets industry standards.
7.What is the process for return or replacement of 25LC128T-E/SN16KVAO?
All 25LC128T-E/SN16KVAO units undergo pre-shipment inspection (PSI). If there is an issue with 25LC128T-E/SN16KVAO, 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 25LC128T-E/SN16KVAO part is unused and in its original packaging.
Return procedure for 25LC128T-E/SN16KVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
25LC128T-E/SN16KVAO 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…
