My Inquiry
My Account
Microchip Technology AT25320B-SSPDGV-T
- Part No.:
- AT25320B-SSPDGV-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25320B-SSPDGV-T.pdf
- Description:
- IC EEPROM 32KBIT SPI 5MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,659
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT25320B-SSPDGV-T from Microchip Technology is a 32 Kbit (4,096 × 8) SPI serial EEPROM optimized for automotive applications, supporting AEC-Q100 Grade 1 (−40°C to +125°C), 1.7V–5.5V operation, 5 MHz clock rate at 5V, and 32-byte page write mode.
For engineers reviewing the AT25320B-SSPDGV-T datasheet, AT25320B-SSPDGV-T pinout, AT25320B-SSPDGV-T application, or AT25320B-SSPDGV-T equivalent, key selection criteria include automotive temperature qualification, hardware/software write protection (WP/HOLD pins), block-level array protection (1/4, 1/2, or full), and self-timed 5 ms max write cycle with 1M endurance.
Technical Context
The AT25320B-SSPDGV-T implements a standard SPI slave interface supporting Modes 0 and 3, with data latched on SCK rising edge and output on falling edge. It integrates a nonvolatile STATUS register controlling WPEN, BP1/BP0 block protection, WEL latch, and RDY/BSY status.
Its architecture includes high-voltage generation for EEPROM programming, address/data registers, row/column decoders, and dedicated pause control for HOLD functionality - all operating without external components across its full voltage and temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 32 Kbits (4,096 × 8 bytes); sufficient for firmware configuration, calibration data, and event logs in automotive ECUs. |
| Interface | SPI slave, Modes 0 & 3 compatible; requires only CS, SCK, SI, SO, WP, HOLD, VCC, GND - no level shifters needed for 1.7–5.5V hosts. |
| Max clock frequency | 5 MHz at VCC = 5.0V; enables ~4 MB/s effective read throughput and fast parameter updates in real-time systems. |
| Write endurance | 1,000,000 cycles; supports frequent recalibration or logging in telematics and ADAS subsystems over product lifetime. |
| Data retention | 100 years at TA = 55°C; ensures long-term integrity of safety-critical calibration tables and VIN/ECU ID storage. |
| Operating temperature | −40°C to +125°C (AEC-Q100 Grade 1); qualified for under-hood and transmission control module deployment. |
| Supply voltage | 1.7V to 5.5V; interoperable with 1.8V microcontrollers and legacy 3.3V/5V automotive power domains. |
Pinout & Package
AT25320B-SSPDGV-T uses an 8-lead SOIC package (3.9 mm × 4.9 mm, 1.27 mm pitch), RoHS-compliant and halide-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be driven low before any instruction; pull-up resistor ≤10 kΩ recommended for robust power-up behavior. |
| SO | Serial Data Output | Tri-state output; drives data on falling SCK edge; high-impedance when CS high or HOLD active. |
| WP | Write-Protect | Hardware lock for STATUS register writes when WPEN = 1; allows system-level protection independent of software state. |
| GND | Ground reference | Common return path for VCC and all I/O; must connect directly to system ground plane for noise immunity. |
| SI | Serial Data Input | Accepts opcodes, addresses, and data on rising SCK edge; MSb-first protocol aligns with standard SPI controllers. |
| SCK | Serial Clock | Asynchronous master-generated clock; defines timing for SI sampling and SO output; idle polarity depends on SPI mode. |
| HOLD | Suspend Serial Input | Pauses ongoing SPI transfer without resetting internal state; useful during interrupt servicing or bus arbitration. |
| VCC | Power supply | 1.7–5.5V input; includes internal POR circuit requiring ≥100 µs stable VCC before first command. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation with full electrical characterization - eliminates need for additional thermal derating in engine control units. |
| 32-byte page write mode | Enables burst programming of up to 32 bytes per write cycle, reducing total programming time by >90% vs. byte-write for configuration blocks. |
| Block write protection (BP1/BP0) | Configurable via STATUS register to lock 1/4, 1/2, or entire memory array - prevents accidental overwrite of boot code or calibration constants. |
| Hardware + software write protection | Combines WP pin (hardware lock) and WREN/WRSR commands (software control) for layered security against firmware corruption. |
| Self-timed 5 ms max write cycle | Internal timing eliminates need for host polling delay; RDY/BSY bit allows deterministic wait-free command sequencing. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Storing adaptive fuel trim values, misfire counters, and diagnostic trouble codes (DTCs) that persist across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration and event logging storage interfaced directly to MCU's SPI peripheral. Use Value: 1M write cycles and 100-year retention ensure reliable DTC history and calibration persistence over 15+ year vehicle life. |
Use Scenario: Saving camera calibration offsets, radar fusion parameters, and sensor alignment data after factory or dealer service. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for safety-critical calibration metadata accessed during boot and runtime. Use Value: Block write protection prevents unintended modification of calibration data; Grade 1 temp rating ensures operation in front-radar modules. |
| Body Control Module (BCM) | Transmission Control Module (TCM) |
Use Scenario: Retaining user preferences (seat position, mirror angle, lighting profiles) and door/window actuator learning values. IC Role / Device Role / Timing Role: Low-power SPI EEPROM used during sleep/wake transitions with <10 µA standby current at 1.7V. Use Value: 1.7V minimum VCC enables direct connection to always-on battery rail; HOLD pin allows safe suspend during CAN wake events. |
Use Scenario: Logging gear shift patterns, torque converter clutch engagement history, and oil temperature compensation curves. IC Role / Device Role / Timing Role: High-reliability data logger co-located with TCM MCU, surviving repeated thermal cycling under transmission housing. Use Value: −40°C to +125°C operation matches transmission fluid temperature extremes; 5 MHz interface supports real-time logging during shifts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95320-DFMN6TP | 32 Kbit SPI EEPROM, 2.5–5.5V, −40°C to +85°C (industrial grade), no AEC-Q100 qualification. | Lacks automotive temperature and reliability validation; suitable for non-safety-critical infotainment or HVAC modules. | Select when AEC-Q100 is not required and cost sensitivity outweighs extended temperature margin. |
| BR24G32FJ-3GE2 | 32 Kbit I²C EEPROM, 1.7–5.5V, −40°C to +125°C, AEC-Q100 Grade 1, but uses I²C (not SPI) interface. | Requires I²C-capable MCU; slower max speed (1 MHz) and no HOLD/WP hardware control; different command set. | Choose only if system already uses I²C bus and SPI pins are constrained; verify timing compatibility with existing firmware stack. |
Compared with M95320-DFMN6TP and BR24G32FJ-3GE2, the AT25320B-SSPDGV-T uniquely delivers SPI-native automotive-grade reliability with hardware HOLD/WP, 5 MHz performance, and full block protection - making it the optimal choice for new ECU, ADAS, and TCM designs requiring SPI integration and AEC-Q100 compliance.
Availability
AT25320B-SSPDGV-T is available at Aetrix Electronics and suitable for engine control units, advanced driver assistance systems, body control modules, transmission control modules, and automotive telematics requiring stable component supply across extended temperature and long lifecycle programs.
Supply support for AT25320B-SSPDGV-T 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 broad automotive qualification and functional safety expertise.
The AT25xxxB family was designed specifically for automotive serial EEPROM applications demanding AEC-Q100 qualification, extended temperature operation, and robust SPI interface compliance - targeting ECU, ADAS, and powertrain control systems.
FAQ
What is the maximum clock frequency supported by the AT25320B-SSPDGV-T?
The AT25320B-SSPDGV-T supports up to 5 MHz SPI clock frequency at VCC = 5.0V. At lower voltages (e.g., 1.7V–2.5V), the maximum clock rate is reduced per AC characteristics in DS20006310A; design margins should follow Table 4-3 for tWH/tWL timing compliance. This 5 MHz capability enables efficient bulk reads and fast configuration updates in automotive microcontroller systems.
Does the AT25320B-SSPDGV-T require external components for basic SPI operation?
No, the AT25320B-SSPDGV-T operates autonomously with no external passive components required for core SPI functionality. A pull-up resistor (≤10 kΩ) on CS is recommended for robust power-up, and decoupling capacitors near VCC/GND are advised per PCB layout best practices - but no level shifters, voltage regulators, or timing elements are needed for standard 1.7–5.5V host interfacing.
How does write protection work on the AT25320B-SSPDGV-T?
The AT25320B-SSPDGV-T implements dual-layer write protection: hardware-based via the WP pin (when WPEN = 1) and software-configurable via BP1/BP0 bits in the STATUS register. WP locks STATUS register writes only; BP bits define protected memory regions (1/4, 1/2, or full array). Both mechanisms operate independently, enabling flexible security policies for calibration data, boot code, and user settings.
Is the AT25320B-SSPDGV-T pin-compatible with other members of the AT25xxxB family?
Yes, the AT25320B-SSPDGV-T shares identical 8-lead SOIC pinout, electrical interface, command set, and timing with AT25080B, AT25160B, and AT25640B. Memory size differs (8/16/32/64 Kbit), but PCB layout, firmware drivers, and signal routing are fully interchangeable - enabling scalable BOM management across vehicle platforms with varying storage needs.
What is the default state of the AT25320B-SSPDGV-T after power-up?
At power-up, the AT25320B-SSPDGV-T enters Standby mode with WEL = 0 (write disabled), RDY/BSY = 0 (ready), WPEN = 0 (WP pin function disabled), and BP1/BP0 = 00 (no array protection). The memory array is pre-programmed to 0xFF, and the STATUS register retains nonvolatile bit states from prior sessions - ensuring predictable initialization for automotive boot sequences.
AT25320B-SSPDGV-T 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:
- 32Kbit
- Memory Organization:
- 4K 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
AT25320B-SSPDGV-T FAQ
1.How can I place an order for AT25320B-SSPDGV-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25320B-SSPDGV-T 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 AT25320B-SSPDGV-T reliable?
The price and inventory of AT25320B-SSPDGV-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25320B-SSPDGV-T is usually 5 days.
3.What payment methods are accepted for AT25320B-SSPDGV-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25320B-SSPDGV-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25320B-SSPDGV-T?
AT25320B-SSPDGV-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25320B-SSPDGV-T 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 AT25320B-SSPDGV-T?
For technical support, including AT25320B-SSPDGV-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25320B-SSPDGV-T requirements.
6.How does Aetrix verify that AT25320B-SSPDGV-T is sourced from the original manufacturer or authorized distributors?
All AT25320B-SSPDGV-T 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 AT25320B-SSPDGV-T meets industry standards.
7.What is the process for return or replacement of AT25320B-SSPDGV-T?
All AT25320B-SSPDGV-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25320B-SSPDGV-T, 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 AT25320B-SSPDGV-T part is unused and in its original packaging.
Return procedure for AT25320B-SSPDGV-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT25320B-SSPDGV-T 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…
