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Microchip Technology AT24C32D-SSPD-T
- Part No.:
- AT24C32D-SSPD-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C32D-SSPD-T.pdf
- Description:
- IC EEPROM 32KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,379
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Product details
Overview
AT24C32D-SSPD-T from Microchip Technology is a 32-Kbit I²C-compatible serial EEPROM optimized for automotive systems, organized as 4,096 × 8-bit memory, operating from 1.7V to 5.5V (Grade 3), with AEC-Q100 qualification, -40°C to +85°C temperature range, and 1,000,000 write endurance - deployed in vehicle body control modules for configuration storage.
For engineers reviewing the AT24C32D-SSPD-T datasheet, AT24C32D-SSPD-T pinout, AT24C32D-SSPD-T application, or AT24C32D-SSPD-T equivalent, key selection criteria include I²C Fast Mode (400 kHz) support, hardware write-protection via WP pin, 5-lead SOT23 package compatibility, and guaranteed 100-year data retention at 55°C.
Technical Context
The AT24C32D-SSPD-T implements a two-wire I²C slave interface with Schmitt-triggered, noise-filtered SDA/SCL inputs, supporting Standard (100 kHz) and Fast (400 kHz) modes. It uses internal address decoding with three hardware-selectable device address pins (A0–A2), enabling up to eight devices on one bus.
Memory is organized into 128 pages of 32 bytes each, supporting partial and full-page writes with self-timed write cycles ≤5 ms. Write protection is controlled by the WP pin: tied to VCC disables all writes; tied to GND enables normal operation. Power-on reset ensures reliable initialization after VCC stabilization ≥100 µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 32 Kbit (4,096 × 8), sufficient for storing calibration tables, VIN/ECU IDs, and fault logs in Tier-1 automotive modules |
| Supply voltage | 1.7V to 5.5V - supports wide-input automotive power rails including post-regulated 1.8V, 3.3V, and 5V domains |
| Operating temperature | -40°C to +85°C (Grade 3) - qualified per AEC-Q100 for under-hood and cabin electronics |
| I²C speed | Up to 400 kHz Fast Mode - enables rapid parameter updates during ECU reprogramming without bus contention |
| Write endurance | 1,000,000 cycles - supports daily firmware configuration updates over 27+ years of vehicle service life |
| Data retention | 100 years at 55°C - ensures long-term integrity of safety-critical settings (e.g., airbag deployment thresholds) |
| Standby current | Max 6 µA at 5.0V - minimizes quiescent drain in always-on vehicle networks (e.g., CAN gateway sleep mode) |
Pinout & Package
AT24C32D-SSPD-T is supplied in a 5-lead SOT23 package - compact (2.9 mm × 1.6 mm × 1.1 mm), surface-mount, RoHS-compliant, with exposed pad optional for thermal relief or grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL | Serial Clock input | Asynchronous master-controlled clock; rising edge latches input data, falling edge outputs data - requires external pull-up (≤10 kΩ) |
| GND | Ground reference | System return path for VCC and signal logic; must be low-impedance connection to minimize noise coupling into SDA/SCL |
| SDA | Bidirectional open-drain data line | Wire-OR capable I²C data bus; requires external pull-up; supports ACK/NACK handshake and multi-master arbitration |
| WP | Hardware write-protect control | Active-high protection: tied to VCC blocks all writes (full array); tied to GND enables full read/write access |
| VCC | Power supply input | Single-supply operation from 1.7V–5.5V; internal POR circuit enforces 100 µs delay before first command acceptance |
Key Features
| Feature | Design Value |
|---|---|
| Automotive AEC-Q100 Grade 3 qualification | Validated for -40°C to +85°C operation with production lot traceability - meets OEM requirements for Tier-1 ECUs |
| 32-byte page write with partial write support | Enables efficient small-parameter updates (e.g., odometer delta, battery SOC offset) without erasing full pages |
| Schmitt-triggered, filtered SDA/SCL inputs | Rejects >100 ns noise spikes - critical for robust I²C communication in high-EMI automotive environments (e.g., near motors or inverters) |
| Ultra-low standby current (≤6 µA) | Extends battery backup runtime in telematics and infotainment modules during ignition-off states |
| Green packaging (Pb-free, halide-free) | Complies with EU RoHS Directive 2011/65/EU and JESD204B - accepted for global vehicle production shipments |
Applications
| Body Control Module (BCM) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
|
Use Scenario: Storing door lock/unlock configuration, mirror position presets, and lighting profiles across vehicle power cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with I²C interface for microcontroller-initiated read/write during wake-up or diagnostics. Use Value: Enables personalized user settings retention without external backup capacitors or supercapacitors - reduces BOM cost and board area. |
Use Scenario: Saving camera calibration offsets, radar sensor alignment data, and lane-departure warning thresholds after factory setup or field recalibration. IC Role / Device Role / Timing Role: Secure, write-protected parameter storage accessed via I²C during ADAS ECU boot or service mode. Use Value: WP pin prevents accidental overwrites during CAN-based diagnostic sessions - maintains functional safety integrity per ISO 26262 ASIL-B requirements. |
| Infotainment Head Unit | Electric Power Steering (EPS) |
|
Use Scenario: Retaining radio station presets, Bluetooth pairing IDs, and display brightness preferences between ignition cycles. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced to application MCU via shared I²C bus with other peripherals. Use Value: 1.7V operation allows direct connection to 1.8V I/O domain - eliminates level-shifter components and associated signal integrity risks. |
Use Scenario: Logging torque sensor zero-point drift compensation values and motor phase resistance calibration data during EPS ECU production test and field updates. IC Role / Device Role / Timing Role: High-reliability nonvolatile memory with 1M write cycles - withstands repeated recalibration events over vehicle lifetime. Use Value: 100-year data retention at 55°C ensures calibration validity even in hot under-hood environments - avoids premature ECU replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics M24C32-DFMN6TP | Same 32-Kbit capacity, SO8 package only; no 5-lead SOT23 option; max 1 MHz I²C (Fast Mode Plus) | Requires PCB redesign for SOIC footprint; higher speed unnecessary for most automotive config storage | Choose only if board layout already uses SO8 and 1 MHz timing margin is needed for concurrent I²C traffic |
| ON Semiconductor CAT24C32HU4IGT3 | Identical 5-lead SOT23 package and pinout; AEC-Q100 Grade 2 (-40°C to +105°C); 1.8V–5.5V supply | Wider temp range suits engine bay placement; lacks Grade 3 certification documentation for OEM release | Select when operating above +85°C is required and AEC-Q100 Grade 3 compliance is not contractually mandated |
Compared with AT24C32D-SSPD-T, the M24C32-DFMN6TP offers faster I²C but forces SOIC layout change, while the CAT24C32HU4IGT3 matches the SOT23 form factor and extends temperature range but lacks Grade 3 validation - making AT24C32D-SSPD-T the optimal choice for certified automotive designs requiring drop-in SOT23 compatibility and full AEC-Q100 documentation.
Availability
AT24C32D-SSPD-T is available at Aetrix Electronics and suitable for automotive body control, ADAS calibration storage, and infotainment personalization requiring stable component supply across multi-year production programs.
Supply support for AT24C32D-SSPD-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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with ISO/TS 16949-certified automotive manufacturing facilities.
The AT24C32D-SSPD-T belongs to Microchip's AEC-Q100-qualified serial EEPROM product line, designed specifically for reliable, low-power nonvolatile data storage in automotive electronic control units where extended temperature operation and long-term data integrity are mandatory.
FAQ
What is the package type and lead count of the AT24C32D-SSPD-T?
The AT24C32D-SSPD-T uses a 5-lead SOT23 package (2.9 mm × 1.6 mm × 1.1 mm), confirmed in Microchip's DS20006271A datasheet Figure 1-1 and Table 2-1. This compact footprint is exclusive to the AT24C32D variant and not offered for AT24C64D. The 'SSPD' in the part number explicitly denotes the SOT23 package with standard lead finish.
Does the AT24C32D-SSPD-T support I²C Fast Mode, and what is its maximum clock frequency?
Yes, the AT24C32D-SSPD-T supports I²C Fast Mode with a maximum clock frequency of 400 kHz, as specified in Section 4.4 (Table 4-3) of the official datasheet. It also supports Standard Mode at 100 kHz. The device incorporates Schmitt triggers and noise filters on SDA/SCL to maintain timing integrity at 400 kHz in electrically noisy automotive environments.
How does the Write-Protect (WP) pin function on the AT24C32D-SSPD-T?
On the AT24C32D-SSPD-T, the WP pin provides hardware-level write protection: when pulled to VCC, it inhibits all write operations to the entire 32-Kbit memory array; when pulled to GND, full read/write access is enabled. If left floating, the pin is internally pulled down to GND, but Microchip recommends hard-wiring it to avoid noise-induced misbehavior in automotive applications.
What AEC-Q100 grade and temperature range apply to the AT24C32D-SSPD-T?
The AT24C32D-SSPD-T is qualified to AEC-Q100 Grade 3, with an operating temperature range of -40°C to +85°C, as documented in Section 1 (Features) and Table 4-1 of the DS20006271A datasheet. This grade is distinct from Grade 1 (-40°C to +125°C) and reflects its intended use in cabin and non-engine-bay automotive subsystems.
What is the memory organization and page structure of the AT24C32D-SSPD-T?
The AT24C32D-SSPD-T contains 32,768 bits organized as 4,096 words of 8 bits each, segmented into 128 pages of 32 bytes. This structure enables efficient 32-byte page writes - including partial writes - with self-timed write cycles completing in ≤5 ms, as defined in Sections 6 and 7.2 of the datasheet.
AT24C32D-SSPD-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:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- 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
AT24C32D-SSPD-T FAQ
1.How can I place an order for AT24C32D-SSPD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32D-SSPD-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 AT24C32D-SSPD-T reliable?
The price and inventory of AT24C32D-SSPD-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C32D-SSPD-T is usually 5 days.
3.What payment methods are accepted for AT24C32D-SSPD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32D-SSPD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32D-SSPD-T?
AT24C32D-SSPD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32D-SSPD-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 AT24C32D-SSPD-T?
For technical support, including AT24C32D-SSPD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32D-SSPD-T requirements.
6.How does Aetrix verify that AT24C32D-SSPD-T is sourced from the original manufacturer or authorized distributors?
All AT24C32D-SSPD-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 AT24C32D-SSPD-T meets industry standards.
7.What is the process for return or replacement of AT24C32D-SSPD-T?
All AT24C32D-SSPD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32D-SSPD-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 AT24C32D-SSPD-T part is unused and in its original packaging.
Return procedure for AT24C32D-SSPD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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