My Inquiry
My Account
Microchip Technology AT25320A-10TU-2.7
- Part No.:
- AT25320A-10TU-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT25320A-10TU-2.7.pdf
- Description:
- IC EEPROM 32KBIT SPI 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,425
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT25320A-10TU-2.7 from Microchip Technology (formerly Atmel) is a 32-Kbit SPI serial EEPROM organized as 4096 × 8 bits, operating from 2.7V to 5.5V, supporting 20 MHz clock rate at 5V, featuring 32-byte page write and block write protection. It serves as nonvolatile configuration storage in industrial control modules requiring low-voltage operation and high endurance.
For engineers reviewing the AT25320A-10TU-2.7 datasheet, AT25320A-10TU-2.7 pinout, AT25320A-10TU-2.7 application, or AT25320A-10TU-2.7 equivalent, key selection criteria include VCC range (2.7–5.5 V), SPI Mode 0/3 compatibility, 1 million write cycles, 100-year data retention, and TSSOP-8 package with hardware/software write protection.
Technical Context
The AT25320A-10TU-2.7 implements a synchronous SPI slave interface with separate SI/SO lines, MSB-first data transfer, and CS-driven command framing. It uses an 8-bit instruction register with op-codes for WREN, WRITE, READ, RDSR, WRSR, and WRDI.
Internal architecture includes a nonvolatile status register with BP0/BP1 for 1/4-, 1/2-, or full-array protection and WPEN bit enabling hardware write protection via the WP pin. The HOLD pin suspends ongoing serial communication without resetting the sequence.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32 Kbit (4096 × 8), sufficient for firmware parameter tables or calibration data in space-constrained designs |
| Supply Voltage | 2.7 V to 5.5 V - supports direct interfacing with 3.3 V and 5 V microcontrollers without level shifting |
| Max Clock Frequency | 20 MHz at VCC = 5 V - enables fast configuration reads during system boot |
| Write Endurance | 1 million cycles - suitable for logging or counter applications with frequent updates |
| Data Retention | 100 years at +25 °C - ensures long-term reliability in unattended industrial deployments |
| Page Write Size | 32 bytes - reduces write time vs. byte-write; requires address alignment management in host firmware |
| Operating Temp | –40 °C to +85 °C - qualified for industrial temperature range without derating |
Pinout & Package
AT25320A-10TU-2.7 is supplied in an 8-lead TSSOP package (JEDEC MO-153, 4.4 mm body width, 0.65 mm pitch), RoHS-compliant and green-marked ("U" suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be held low for entire SPI transaction; controls SO output state (high-Z when high) |
| SCK | Serial Clock | Input-only master-generated clock; timing critical for tWH/tWL (20 ns min at 5 V); defines SPI Mode 0/3 edge sensitivity |
| SI | Serial Data Input | Command/address/data input; sampled on SCK rising edge in Mode 0; requires tSU/tH setup/hold timing compliance |
| SO | Serial Data Output | Data output; driven only when CS is low; transitions valid after tV (20 ns max at 5 V); high-Z when CS high or HOLD active |
| WP | Write Protect | Hardware lock for status register writes when WPEN = 1; prevents accidental configuration corruption during power transients |
| HOLD | Communication Suspend | Pauses SPI transfer mid-sequence when asserted low during SCK low; preserves internal address counter and state |
| VCC | Power Supply | Primary supply rail; decoupling capacitor required near pin to suppress switching noise during write cycles |
| GND | Ground Reference | Return path for all I/O and core logic; must be low-impedance connection to minimize ground bounce during SO transitions |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 support | Enables interoperability with diverse MCUs including legacy 68HC11 and modern ARM Cortex-M peripherals without protocol translation |
| Block write protection | Configurable 1/4, 1/2, or full memory array lock via status register - isolates critical firmware parameters from runtime overwrites |
| Self-timed 5 ms write cycle | Eliminates need for external write timing control; host polls RDSR RDY bit to detect completion before next access |
| WP pin + software disable | Dual-layer protection: hardware (WP pin) blocks status register writes; WRDI instruction disables all programming regardless of WP state |
| HOLD pin functionality | Allows real-time interruption of EEPROM access during MCU interrupt servicing - avoids data loss or bus contention |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during cold start and updated during commissioning or field maintenance. Use Value: 100-year retention and 1M endurance ensure parameter integrity across 15+ year equipment lifecycles without battery backup. | Use Scenario: Holding sensor offset/gain coefficients and regulatory audit logs in portable diagnostic instruments. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for FDA-required calibration history; accessed via SPI during device self-test. Use Value: Block protection prevents unauthorized modification of calibration data; WP pin hardens against ESD-induced register corruption. |
| Automotive Body Control Module | Smart Energy Meter Firmware Parameters |
Use Scenario: Saving seat/mirror position presets and lighting profiles in automotive BCMs operating across –40°C to +85°C. IC Role / Device Role / Timing Role: SPI-connected configuration memory initialized at power-up and written during user preference changes. Use Value: Industrial temp rating and 2.7–5.5 V operation allow direct integration into 12 V vehicle systems with minimal regulation. | Use Scenario: Storing tariff schedules, meter ID, and cryptographic keys in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: Secure nonvolatile storage accessed by metering SoC during firmware update validation and secure boot. Use Value: Hardware write protection (WP pin + WPEN) prevents malicious overwrite of security-critical fields during field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95320-DRMN6TP/K | 32 Kbit SPI EEPROM, 1.8–5.5 V, 20 MHz, TSSOP-8, same pinout but STMicroelectronics silicon | Identical memory organization and protection features; differs in AC timing margins (tWH/tWL = 40 ns min at 2.7 V) | Select when qualifying alternate sources for supply chain resilience; verify tSU/tH timing against host controller drive strength |
| BR24G32FJ-3GE2 | 32 Kbit I²C EEPROM, 1.7–5.5 V, 1 MHz max, TSSOP-8, different interface and slower speed | Requires I²C host instead of SPI; lacks HOLD pin and block protection granularity (only WP pin) | Choose only if system already uses I²C infrastructure and does not require fast writes or suspend capability |
Compared with M95320-DRMN6TP/K, AT25320A-10TU-2.7 offers tighter AC timing at low voltage and native SPI Mode 3 support; versus BR24G32FJ-3GE2, it delivers 20× faster write throughput and finer-grained memory protection for safety-critical firmware storage.
Availability
AT25320A-10TU-2.7 is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, automotive body electronics, and smart energy metering requiring stable component supply and long-term lifecycle support.
Supply support for AT25320A-10TU-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 nonvolatile memory solutions, with broad industrial and automotive qualification coverage.
The AT25320A-10TU-2.7 belongs to Microchip's AT25xxx family of SPI EEPROMs, designed specifically for reliable, low-power configuration storage in resource-constrained embedded systems where pin count and board space are critical.
FAQ
What is the maximum clock frequency supported by AT25320A-10TU-2.7 at 3.3 V operation?
The AT25320A-10TU-2.7 supports up to 10 MHz SCK frequency when VCC = 2.7–3.6 V, per Table 1-3 AC Characteristics. This is confirmed by the 2.7–5.5 V voltage column specifying fSCK max = 10 MHz. Operation above this rate risks setup/hold violations and read/write errors.
Does AT25320A-10TU-2.7 support SPI Mode 1 or Mode 2, or only Modes 0 and 3?
AT25320A-10TU-2.7 explicitly supports only SPI Modes 0 (CPOL = 0, CPHA = 0) and 3 (CPOL = 1, CPHA = 1), as stated in its Features section. It does not support Mode 1 or Mode 2; attempting those configurations will result in incorrect data sampling due to mismatched clock polarity and phase timing.
How is block write protection configured on AT25320A-10TU-2.7, and what memory ranges does it cover?
Block write protection on AT25320A-10TU-2.7 is set via BP0/BP1 bits in the status register using the WRSR instruction. For the AT25320A variant, BP1=0/BP0=1 protects addresses 0C00–0FFF (1/4 array), BP1=1/BP0=0 protects 0800–0FFF (1/2 array), and BP1=1/BP0=1 protects 0000–0FFF (full array), per Table 3-4.
Can AT25320A-10TU-2.7 be used in automotive applications, and what qualification level does it meet?
Yes, AT25320A-10TU-2.7 is available in automotive-grade versions (e.g., AT25320A-10MU-2.7), but the -10TU-2.7 variant is specified for industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. Use only in non-safety-critical automotive subsystems unless automotive-grade ordering code is selected.
What is the function of the HOLD pin on AT25320A-10TU-2.7, and what timing constraints apply?
The HOLD pin on AT25320A-10TU-2.7 suspends ongoing SPI communication without resetting the internal address counter or command state. To activate, HOLD must go low while SCK is low; to resume, HOLD must return high while SCK remains low. Minimum tHD (HOLD setup) and tCD (HOLD hold) are 10 ns at 2.7 V, per Table 1-3.
AT25320A-10TU-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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:
- 20 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
AT25320A-10TU-2.7 FAQ
1.How can I place an order for AT25320A-10TU-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25320A-10TU-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 AT25320A-10TU-2.7 reliable?
The price and inventory of AT25320A-10TU-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 AT25320A-10TU-2.7 is usually 5 days.
3.What payment methods are accepted for AT25320A-10TU-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25320A-10TU-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25320A-10TU-2.7?
AT25320A-10TU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25320A-10TU-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 AT25320A-10TU-2.7?
For technical support, including AT25320A-10TU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25320A-10TU-2.7 requirements.
6.How does Aetrix verify that AT25320A-10TU-2.7 is sourced from the original manufacturer or authorized distributors?
All AT25320A-10TU-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 AT25320A-10TU-2.7 meets industry standards.
7.What is the process for return or replacement of AT25320A-10TU-2.7?
All AT25320A-10TU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT25320A-10TU-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 AT25320A-10TU-2.7 part is unused and in its original packaging.
Return procedure for AT25320A-10TU-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT25320A-10TU-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…
