My Inquiry
My Account
Microchip Technology 25C160T-I/SN
- Part No.:
- 25C160T-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
25C160T-I/SN.pdf
- Description:
- IC EEPROM 16KBIT SPI 3MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,377
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
25C160T-I/SN from Microchip Technology Inc. is a 16 Kbit (2048 × 8) SPI Serial EEPROM with automotive-grade temperature range (−40°C to +125°C), 3 MHz max clock frequency, and 4.5–5.5 V supply. It features 16-byte page write, hardware write protection via WP pin, and HOLD functionality for interrupt-safe serial communication - used in engine control units, battery management systems, and industrial sensor calibration storage.
For engineers reviewing the 25C160T-I/SN datasheet, 25C160T-I/SN pinout, 25C160T-I/SN application, or 25C160T-I/SN equivalent, key selection criteria include its −40°C to +125°C operation, 3 MHz SPI interface speed, 5 ms max internal write cycle time, block-level write protection (0/¼/½/all array), and SOIC-8 narrow (150 mil) package compatibility with high-reliability embedded systems.
Technical Context
The 25C160T-I/SN implements a standard SPI Mode 0,0 or Mode 1,1 interface with separate SI (data-in) and SO (data-out) lines, CS-controlled selection, and HOLD-driven pause capability. Its internal architecture includes an 8-bit instruction register, page latches, and high-voltage generator for EEPROM programming.
Write operations require explicit WREN instruction followed by CS high-to-low transition to initiate self-timed 5 ms erase/write cycles; status is monitored via RDSR (WIP bit). Block protection is controlled by BP0/BP1 bits in the nonvolatile status register, configurable to protect upper ¼, upper ½, or entire memory array.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 × 8) - supports firmware parameter storage, calibration data, and configuration registers in resource-constrained microcontroller systems. |
| SPI Clock Frequency | Up to 3 MHz at VCC = 4.5–5.5 V - enables fast read/write transfers compatible with mid-speed MCU SPI peripherals without clock divider overhead. |
| Write Cycle Time | 5 ms maximum - defines minimum interval between successive page writes; impacts real-time logging latency and system responsiveness during nonvolatile updates. |
| Operating Temperature | −40°C to +125°C (Automotive E grade) - qualified for under-hood and powertrain applications where thermal stability is critical. |
| Supply Voltage Range | 4.5 V to 5.5 V - matches standard 5 V logic rails and automotive 5 V regulators, eliminating need for level-shifting circuitry. |
| Endurance & Retention | 1 million write/erase cycles; >200 years data retention - ensures long-term reliability in infrequent-write, mission-critical storage roles. |
| Page Size | 16 bytes - constrains burst write length; requires software alignment to avoid page-boundary wraparound during multi-byte writes. |
Pinout & Package
25C160T-I/SN is housed in an 8-pin Plastic Small Outline (SOIC) package, 150 mil body width (JEDEC MS-012), with gull-wing leads and surface-mount footprint. Pin pitch is 1.27 mm (0.050 inch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select Input | Active-low enable; places device in standby when high; must be low for all SPI transactions; rising edge after write sequence triggers internal write cycle. |
| SO (Pin 2) | Serial Data Output | Tri-state open-drain output; data shifted out on SCK falling edge; enters high-impedance state when CS is high or HOLD is asserted. |
| WP (Pin 3) | Write-Protect Input | Hardware lock for status register when WPEN=1; low = blocks nonvolatile status writes; high = full functionality; no effect unless WPEN bit is set. |
| VSS (Pin 4) | Ground Reference | Primary return path for all internal circuits; must be connected to system ground plane with low-inductance routing for noise immunity. |
| SI (Pin 5) | Serial Data Input | CMOS input receiving instructions, addresses, and data; sampled on SCK rising edge; requires clean signal integrity for reliable command decoding. |
| SCK (Pin 6) | Serial Clock Input | Synchronizes all SPI transfers; rising edge clocks SI data in; falling edge clocks SO data out; timing margins defined per VCC voltage tier. |
| HOLD (Pin 7) | Communication Pause Input | Active-low suspend signal; must be driven low while SCK is low to enter hold mode; tri-states SO, SI, and SCK during pause; resumes from exact point on release. |
| VCC (Pin 8) | Power Supply | 4.5–5.5 V nominal supply; powers EEPROM core, interface logic, and HV generator; bypass capacitor (0.1 µF) required near pin for transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Block Write Protection | Configurable via BP0/BP1 bits to protect none, upper ¼ (0600h–07FFh), upper ½ (0400h–07FFh), or entire array (0000h–07FFh) - enables secure storage of bootloader or safety-critical parameters. |
| HOLD Functionality | Pauses ongoing SPI sequences without reset or reinitialization - allows host MCU to service higher-priority interrupts while preserving transaction state across hold/resume boundaries. |
| Hardware Write Protection | WP pin + WPEN bit combination provides dual-layer control: physical pin grounding disables status register writes only, leaving memory reads/writes unaffected unless WPEN is set. |
| Low-Power Operation | 500 nA typical standby current and 3 mA max write current - reduces quiescent power draw in always-on automotive modules and extends battery life in backup-supplied systems. |
| Self-Timed Internal Writes | No external timing control needed; CS high after data transfer initiates automatic 5 ms erase/write cycle - simplifies firmware design and eliminates need for precise delay loops or polling overhead. |
Applications
| Engine Control Unit (ECU) | Battery Management System (BMS) |
|---|---|
Use Scenario: Storing adaptive fuel trim values, fault codes, and sensor calibration offsets that persist across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with deterministic 5 ms write latency and −40°C to +125°C operation under hood conditions. Use Value: Enables closed-loop engine optimization without volatile RAM backup; withstands thermal cycling and vibration in automotive environments. | Use Scenario: Recording cell voltage history, pack balancing logs, and SOC/SOH metadata for lithium-ion battery packs. IC Role / Device Role / Timing Role: Low-power, high-reliability data logger interfaced to MCU SPI bus with HOLD support for interrupt-driven sampling. Use Value: Ensures accurate lifetime diagnostics even during transient load events; 1M endurance supports daily logging over 27+ years. |
| Industrial PLC I/O Module | Medical Infusion Pump |
Use Scenario: Holding module identification, channel scaling factors, and user-defined alarm thresholds in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Configuration EEPROM accessed during boot and runtime via SPI; protected against accidental overwrite using WP pin. Use Value: Eliminates manual DIP-switch setup; enables field-upgradable calibration without firmware changes or service tools. | Use Scenario: Storing drug library profiles, dose limits, and usage audit trails compliant with FDA 21 CFR Part 11 requirements. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory with write-protection granularity to prevent unauthorized parameter modification. Use Value: Meets medical device data integrity standards; >200-year retention guarantees audit log persistence across product lifecycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI Serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 25AA160T-I/SN | 1.8–5.5 V supply; 1 MHz max clock; −40°C to +85°C industrial grade; same pinout and instruction set. | Broader VCC range enables single-BOM use across 3.3 V and 5 V systems; lower speed limits throughput in high-bandwidth logging. | Select when mixed-voltage designs or extended low-VCC operation (down to 1.8 V) are required; not suitable for automotive under-hood locations. |
| 25LC160T-I/SN | 2.5–5.5 V supply; 2 MHz max clock; −40°C to +85°C industrial grade; identical SOIC-8 package and pinout. | Optimized for 2.5–3.3 V MCU interfaces; faster than 25AA160 but slower than 25C160; lacks automotive temperature qualification. | Prefer for industrial control or consumer electronics with 3.3 V rails; avoids 5 V regulator dependency while maintaining adequate speed. |
Compared with 25AA160T-I/SN and 25LC160T-I/SN, the 25C160T-I/SN delivers the highest SPI clock rate (3 MHz) and widest temperature range (−40°C to +125°C), making it uniquely suited for automotive powertrain and high-reliability industrial applications where both speed and thermal robustness are mandatory.
Availability
25C160T-I/SN is available at Aetrix Electronics and suitable for engine control units, battery management systems, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 25C160T-I/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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 25C160T-I/SN belongs to Microchip's legacy SPI Serial EEPROM product line, designed specifically for automotive and industrial applications demanding guaranteed operation from −40°C to +125°C with robust write protection and deterministic timing.
FAQ
What is the maximum SPI clock frequency supported by the 25C160T-I/SN?
The 25C160T-I/SN supports up to 3 MHz SPI clock frequency when operated within its specified VCC range of 4.5 V to 5.5 V and temperature range of −40°C to +125°C. This value is confirmed in the Device Selection Table and AC Characteristics section of the DS21231E datasheet. Lower frequencies apply at reduced supply voltages, but those do not apply to the 25C160T-I/SN due to its fixed 4.5–5.5 V operating window. The 25C160T-I/SN achieves this speed while maintaining full compliance with SPI Mode 0,0 and Mode 1,1 timing requirements.
Does the 25C160T-I/SN support hardware write protection, and how is it configured?
Yes, the 25C160T-I/SN supports hardware write protection via the WP pin in conjunction with the WPEN bit in its nonvolatile status register. When WPEN = 1 and WP = low, writes to the nonvolatile status register are disabled - protecting BP0/BP1 and WPEN bits from accidental overwrite. The 25C160T-I/SN's WP pin function is inactive unless WPEN is explicitly set, allowing flexible system-level protection schemes. This dual-control mechanism is documented in Section 2.3 and Table 3-3 of the DS21231E datasheet.
What package type and footprint does the 25C160T-I/SN use?
The 25C160T-I/SN uses an 8-pin Plastic Small Outline (SOIC) package with 150 mil body width (designated "SN" in Microchip's part numbering), matching JEDEC MS-012. Its lead pitch is 1.27 mm, overall width is 3.91–3.99 mm, and height is 1.32–1.55 mm. This package is fully compatible with standard SOIC-8 reflow profiles and automated PCB assembly. The "/SN" suffix in 25C160T-I/SN explicitly denotes this narrow SOIC variant, as defined in the Product Identification System on DS21231E page 19.
How does the HOLD pin function on the 25C160T-I/SN during SPI communication?
The HOLD pin on the 25C160T-I/SN suspends ongoing SPI transactions without resetting the internal state. When pulled low while SCK is low, it places SI, SO, and SCK in high-impedance states and ignores further input transitions - enabling the host MCU to service urgent interrupts. Communication resumes from the exact bit position upon HOLD return to high (with SCK still low). This behavior is electrically characterized in AC parameter #16–#19 and functionally described in Section 2.6 and Figure 1-1 of DS21231E. The 25C160T-I/SN requires no re-synchronization after hold release.
Is the 25C160T-I/SN recommended for new designs, and what is the suggested migration path?
No - the 25C160T-I/SN is marked "Not recommended for new designs" per DS21231E page 1, with Microchip recommending migration to the 25AA160A/B or 25LC160A/B families. These newer variants offer enhanced ESD performance (>6 kV), improved write endurance characterization, and updated packaging. However, the 25C160T-I/SN remains fully supported for existing designs and legacy production, especially where −40°C to +125°C operation and 3 MHz SPI speed are required. Migration requires validation of timing, voltage, and software compatibility.
25C160T-I/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:
- 3 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
25C160T-I/SN FAQ
1.How can I place an order for 25C160T-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 25C160T-I/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 25C160T-I/SN reliable?
The price and inventory of 25C160T-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 25C160T-I/SN is usually 5 days.
3.What payment methods are accepted for 25C160T-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25C160T-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25C160T-I/SN?
25C160T-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25C160T-I/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 25C160T-I/SN?
For technical support, including 25C160T-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25C160T-I/SN requirements.
6.How does Aetrix verify that 25C160T-I/SN is sourced from the original manufacturer or authorized distributors?
All 25C160T-I/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 25C160T-I/SN meets industry standards.
7.What is the process for return or replacement of 25C160T-I/SN?
All 25C160T-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 25C160T-I/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 25C160T-I/SN part is unused and in its original packaging.
Return procedure for 25C160T-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
25C160T-I/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…
