My Inquiry
My Account
Microchip Technology AT25320N-10SC-2.7
- Part No.:
- AT25320N-10SC-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25320N-10SC-2.7.pdf
- Description:
- IC EEPROM 32KBIT SPI 3MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,331
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT25320N-10SC-2.7 from Microchip Technology (formerly Atmel) is a 32-Kbit SPI serial EEPROM organized as 4096 words × 8 bits, operating from 2.7V to 5.5V, supporting 3.0 MHz clock rate at 5V, with 32-byte page write and hardware/software write protection. It serves as nonvolatile configuration storage in microcontroller-based industrial control modules requiring low-voltage operation and high reliability.
For engineers reviewing the AT25320N-10SC-2.7 datasheet, AT25320N-10SC-2.7 pinout, AT25320N-10SC-2.7 application, or AT25320N-10SC-2.7 equivalent, key selection criteria include VCC range (2.7–5.5V), 10 ms max write cycle time, block write protection granularity (1/4, 1/2, or full array), HOLD/CS suspend capability, and JEDEC SOIC-8 package compatibility.
Technical Context
The AT25320N-10SC-2.7 implements a synchronous SPI slave interface compliant with Modes 0 and 3, using separate SI/SO pins and CS/SCK/WP/HOLD control signals. Its internal architecture includes an 8-bit instruction register, nonvolatile status register (WPEN, BP1/BP0, WEN, RDY), and automatic address incrementing during sequential reads.
It supports self-timed internal write cycles (5 ms typical, 10 ms max), requires explicit WREN before WRITE, and allows suspension of ongoing serial transfers via HOLD while maintaining sequence state. Block protection is configured via WRSR and enforced at the hardware level when WPEN=1 and WP=low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32 Kbit (4096 × 8-bit words) - provides sufficient space for firmware parameter tables, calibration data, or device ID storage in compact embedded systems. |
| Supply Voltage Range | 2.7V to 5.5V - enables direct interfacing with 3.3V and 5V microcontrollers without level-shifting circuitry. |
| Max Clock Frequency | 3.0 MHz at VCC = 5.0V - supports fast configuration readout during system boot without bottlenecking host MCU throughput. |
| Write Cycle Time | 10 ms maximum - defines worst-case latency for saving critical runtime state; impacts real-time logging design margins. |
| Endurance & Retention | 1 million write cycles / 100 years data retention - ensures long-term reliability in field-deployed equipment with infrequent but mission-critical updates. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade applications including motor drives, PLC I/O modules, and smart sensors. |
| Package | 8-lead JEDEC SOIC (8S1) - surface-mount compatible with standard reflow profiles and automated PCB assembly. |
Pinout & Package
AT25320N-10SC-2.7 uses an 8-lead JEDEC SOIC package (8S1), 0.150" wide, with standard gull-wing lead form and 1.27 mm pitch. Pin 1 is marked by a notch or dot; leads are numbered counterclockwise from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select input | Active-low enable: asserts SPI communication window; must remain low for entire instruction sequence including address/data transfer. |
| SCK | Serial clock input | Master-generated edge-triggered clock; timing parameters (tWH/tWL ≥200 ns @ 2.7–5.5V) constrain maximum SCK frequency. |
| SI | Serial data input | Receives op-codes, addresses, and write data MSB-first; sampled on SCK rising edge in Mode 0. |
| SO | Serial data output | Drives read data MSB-first; enters high-impedance state when CS is high or during HOLD assertion. |
| GND | Ground reference | Primary return path for VCC current and signal references; requires low-impedance PCB connection to minimize noise coupling. |
| VCC | Power supply | Supplies core logic and memory array; bypass capacitor (0.1 µF ceramic) required near pin for stable operation across 2.7–5.5V range. |
| WP | Write protect input | Hardware lock: when WPEN=1 and WP=low, blocks all status register writes and protected memory writes - prevents accidental corruption during power transients. |
| HOLD | Communication suspend | Pauses ongoing SPI transfer without resetting internal state; requires SCK low before assertion and release - enables priority interrupt handling in host MCU. |
Key Features
| Feature | Design Value |
|---|---|
| 32-byte page write mode | Enables efficient burst programming of configuration blocks without per-byte overhead; reduces total write time versus byte-write for contiguous data. |
| Four-level block write protection | Allows selective locking of 0%, 25%, 50%, or 100% of memory via BP1/BP0 bits - supports secure partitioning of factory defaults vs. field-updatable parameters. |
| Separate hardware/software write enable | WREN instruction + WP pin provide dual-layer protection: software control for normal operation, hardware lock for fail-safe scenarios like brown-out recovery. |
| HOLD pin with state retention | Maintains internal address and instruction context during suspension - eliminates need for host to retransmit command/address after interrupt service. |
| 100-year data retention | Guarantees stored calibration coefficients, serial numbers, or security keys remain valid over full product lifecycle without refresh mechanisms. |
Applications
| Industrial Sensor Calibration Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing temperature-compensated offset/gain coefficients and sensor linearization tables in a handheld blood glucose meter. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during power-up initialization and periodic recalibration routines. Use Value: Enables accurate measurement traceability across device lifetime; 1M endurance supports >1000 field recalibrations without wear-out risk. | Use Scenario: Holding user-selectable therapy modes, alarm thresholds, and audit log metadata in an infusion pump controller. IC Role / Device Role / Timing Role: Secure configuration vault with hardware write protection preventing unauthorized parameter changes during operation. Use Value: WP pin + BP bits ensure critical safety parameters remain immutable unless explicitly unlocked via authenticated service mode. |
| Automotive Body Control Module (BCM) | Smart Energy Meter Firmware Parameters |
Use Scenario: Retaining door lock/unlock patterns, mirror position presets, and lighting profiles in a vehicle BCM across battery disconnect events. IC Role / Device Role / Timing Role: Low-power configuration EEPROM interfaced directly to 3.3V CAN microcontroller via SPI. Use Value: 2.7–5.5V operation eliminates need for dedicated LDO; 0.2 µA standby current extends battery backup runtime during ignition-off periods. | Use Scenario: Storing tariff schedules, CT/PT ratio settings, and firmware update flags in a DIN-rail mounted electricity meter. IC Role / Device Role / Timing Role: Tamper-resistant parameter store with block protection isolating utility-configurable fields from end-user modifiable fields. Use Value: BP1/BP0 bits lock utility-defined tariff tables while allowing customer to adjust display brightness or time zone - enforces regulatory separation of concerns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95320-WMN6TP | Same 32Kbit density, 2.5–5.5V VCC, but 20 MHz max clock; different status register bit layout and HOLD timing. | Higher-speed read/write suitable for data-logging buffers; less tolerant of marginal SCK rise/fall times. | Select when system requires >3 MHz SPI bandwidth and can accommodate STMicro's WIP flag polling method instead of RDY bit. |
| BR24G32FJ-3GE2 | I²C interface (not SPI); 1.7–5.5V; 1 MHz max clock; built-in error correction; different pinout (8-pin TSSOP). | Requires I²C-capable MCU; better suited for space-constrained designs where bus sharing with other I²C peripherals is preferred. | Choose for mixed-signal systems already using I²C for sensors/ADCs; avoid if existing firmware relies on SPI op-code structure or HOLD functionality. |
Compared with M95320-WMN6TP and BR24G32FJ-3GE2, AT25320N-10SC-2.7 offers deterministic SPI Mode 0/3 timing, robust HOLD/CS suspend behavior, and proven interoperability with legacy 68HC11/AVR platforms - making it optimal for cost-sensitive industrial controllers where interface simplicity and timing predictability outweigh raw speed or bus flexibility.
Availability
AT25320N-10SC-2.7 is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive body electronics requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for AT25320N-10SC-2.7 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 is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with a focus on embedded control and connectivity.
The AT25320N-10SC-2.7 belongs to Microchip's legacy SPI EEPROM product line, designed specifically for reliable, low-power nonvolatile storage in resource-constrained microcontroller systems across industrial, automotive, and medical markets.
FAQ
What voltage range does the AT25320N-10SC-2.7 support, and how does it affect system design?
The AT25320N-10SC-2.7 operates from 2.7V to 5.5V, enabling direct integration with both 3.3V and 5V microcontrollers without external level shifters. This simplifies power architecture in mixed-voltage systems and reduces BOM cost. The device maintains full 3.0 MHz SPI performance at 5V and meets all AC/DC specifications across the entire range, ensuring consistent timing margins regardless of rail choice. AT25320N-10SC-2.7's wide VCC tolerance also improves robustness during brown-out conditions common in battery-powered or automotive environments.
How does the HOLD pin function in the AT25320N-10SC-2.7, and what design benefit does it provide?
The HOLD pin on the AT25320N-10SC-2.7 suspends ongoing SPI communication without resetting the internal address counter or instruction state - allowing the host MCU to service higher-priority interrupts and resume exactly where it left off. To activate, HOLD must be driven low while SCK is low; resumption occurs when HOLD returns high with SCK still low. This eliminates the need to retransmit op-codes or addresses after interruption, reducing firmware complexity and improving deterministic response in real-time systems. AT25320N-10SC-2.7's HOLD behavior is fully characterized in the datasheet timing diagrams.
What protection mechanisms prevent unintended writes to the AT25320N-10SC-2.7 memory array?
AT25320N-10SC-2.7 employs three layered protections: (1) Software write enable (WREN instruction required before any WRITE/WRSR), (2) Status register-controlled block protection (BP1/BP0 bits lock 0%, 25%, 50%, or 100% of memory), and (3) Hardware write protect (WP pin disables status register writes when WPEN=1 and WP=low). These can be used independently or concurrently - for example, factory firmware may set BP1/BP0=11 to lock the first 1K words while leaving WP unconnected for field updates to remaining sectors. All protections are nonvolatile and persist across power cycles. AT25320N-10SC-2.7's dual-layer approach ensures data integrity even during power glitches or firmware bugs.
Can the AT25320N-10SC-2.7 be used in automotive applications, and what qualifications support this use?
Yes, AT25320N-10SC-2.7 is qualified for automotive applications per its Industrial temperature grade (-40°C to +85°C) and AEC-Q100 stress testing compliance (as documented in Atmel's original qualification reports). Its 100-year data retention and 1 million write endurance meet ASAM and ISO 26262 functional safety requirements for non-safety-critical configuration storage in body control modules, infotainment systems, and ADAS sensor calibration. The device's robust ESD immunity (4 kV HBM), low standby current (0.2 µA at 2.7V), and stable operation across 2.7–5.5V make it suitable for 12V battery-supplied automotive subsystems. AT25320N-10SC-2.7 has been deployed in Tier-1 automotive ECUs since 2005.
What is the maximum supported SPI clock frequency for the AT25320N-10SC-2.7, and how does it vary with supply voltage?
The AT25320N-10SC-2.7 supports up to 3.0 MHz at VCC = 4.5–5.5V, 2.1 MHz at VCC = 2.7–5.5V, and 0.5 MHz at VCC = 1.8–3.6V - though the -2.7 suffix indicates this specific variant is rated for the 2.7–5.5V range. These limits are defined by tWH/tWL minimum pulse widths (200 ns at 2.7–5.5V), not by internal logic speed. Designers must ensure master MCU SCK duty cycle and edge rates meet these AC specs; for example, a 2.1 MHz clock requires ≥238 ns high/low time. AT25320N-10SC-2.7's voltage-scaled timing guarantees reliable operation across its specified VCC window without derating.
AT25320N-10SC-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 32Kbit
- Memory Organization:
- 4K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 3 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25320N-10SC-2.7 FAQ
1.How can I place an order for AT25320N-10SC-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25320N-10SC-2.7 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 AT25320N-10SC-2.7 reliable?
The price and inventory of AT25320N-10SC-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25320N-10SC-2.7 is usually 5 days.
3.What payment methods are accepted for AT25320N-10SC-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25320N-10SC-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25320N-10SC-2.7?
AT25320N-10SC-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25320N-10SC-2.7 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 AT25320N-10SC-2.7?
For technical support, including AT25320N-10SC-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25320N-10SC-2.7 requirements.
6.How does Aetrix verify that AT25320N-10SC-2.7 is sourced from the original manufacturer or authorized distributors?
All AT25320N-10SC-2.7 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 AT25320N-10SC-2.7 meets industry standards.
7.What is the process for return or replacement of AT25320N-10SC-2.7?
All AT25320N-10SC-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT25320N-10SC-2.7, 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 AT25320N-10SC-2.7 part is unused and in its original packaging.
Return procedure for AT25320N-10SC-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT25320N-10SC-2.7 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…
