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Microchip Technology AT24C64D-SSPD-T
- Part No.:
- AT24C64D-SSPD-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C64D-SSPD-T.pdf
- Description:
- IC EEPROM 64KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,335
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Product details
Overview
AT24C64D-SSPD-T from Microchip Technology is a 64-Kbit (8,192 × 8) I²C-compatible automotive-grade serial EEPROM with AEC-Q100 Grade 1 qualification (-40°C to +125°C), 1.7V–5.5V supply range, and hardware write-protection via WP pin - deployed for configuration storage in engine control units, ADAS sensors, and body electronics.
For engineers reviewing the AT24C64D-SSPD-T datasheet, AT24C64D-SSPD-T pinout, AT24C64D-SSPD-T application, or AT24C64D-SSPD-T equivalent, key selection criteria include I²C Fast Mode (400 kHz) timing compliance, 32-byte page write capability, ultra-low standby current (≤6 μA), and SOIC-8 package compatibility with automotive PCB layouts.
Technical Context
The AT24C64D-SSPD-T operates as an I²C slave device with fixed 7-bit address prefix 1010b and three hardware-selectable address bits (A0–A2), enabling up to eight devices on one bus. It implements Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain bidirectional data transfer synchronized to rising/falling clock edges.
Internally organized as 256 pages of 32 bytes each, it supports byte-write, page-write (with partial-page capability), random read, and sequential read modes. Write cycles are self-timed with ≤5 ms maximum duration and include automatic acknowledge polling support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 64 Kbit (8,192 × 8 bits), mapped to 65,536 addressable bytes |
| Supply voltage | 1.7V–5.5V (Grade 3) / 2.5V–5.5V (Grade 1); supports wide-input automotive power rails |
| Operating temperature | -40°C to +125°C (AEC-Q100 Grade 1); qualified for under-hood ECU use |
| I²C interface speed | Up to 400 kHz Fast Mode; meets timing specs including tLOW ≥1.2 µs, tHIGH ≥0.6 µs |
| Write endurance | 1,000,000 cycles per memory location; ensures long-term reliability in field-updatable systems |
| Data retention | 100 years at 55°C; validated for lifetime storage of calibration and diagnostic data |
| Standby current | ≤6 µA at VCC = 5.0V; enables low-power sleep states in always-on vehicle modules |
| Page write buffer | 32-byte page; allows burst writes without inter-byte delays, reducing firmware overhead |
Pinout & Package
AT24C64D-SSPD-T is supplied in an 8-lead SOIC package (SSPD = Small Outline Integrated Circuit, Plastic, 150 mil width). Pin 1 is marked with a notch or dot; pin numbering follows standard SOIC convention (counterclockwise from top-left).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device address input | Hardwired to GND/VCC to set LSB of 7-bit I²C slave address; enables multi-device bus topology |
| A1 | Device address input | Hardwired to GND/VCC to set middle bit of slave address; supports up to eight parallel EEPROMs |
| A2 | Device address input | Hardwired to GND/VCC to set MSB of slave address; required for unique addressing in distributed systems |
| GND | Ground reference | System return path for VCC and all I/O; must be low-impedance connection to minimize noise coupling |
| SDA | Serial data line | Open-drain bidirectional I²C data bus; requires external pull-up resistor (≤10 kΩ) to VCC |
| SCL | Serial clock line | Input-only I²C clock; driven by master; must be pulled high externally when idle |
| WP | Write-protect control | Active-high hardware lock: tied to VCC disables all writes; tied to GND enables full memory access |
| VCC | Power supply | Primary DC input (1.7–5.5 V); includes internal POR circuit requiring ≥100 µs stable delay before first command |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive under-hood operation (-40°C to +125°C), including thermal cycling and HTOL stress |
| Hardware write protection (WP) | Pin-level enable/disable of write operations - prevents accidental overwrites during power transients or firmware faults |
| Noise-immune I²C interface | Schmitt-trigger inputs + digital filtering suppress >100 ns glitches, improving robustness in electrically noisy vehicle harnesses |
| 32-byte page write mode | Enables efficient firmware updates with single-command multi-byte writes, reducing bus occupancy vs. byte-by-byte |
| 100-year data retention | Guaranteed retention at 55°C - exceeds automotive OEM requirements for 15+ year vehicle lifetimes |
| Green packaging | RoHS-compliant, halide-free, lead-free SOIC-8; meets automotive ELV and IMDS reporting standards |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
|
Use Scenario: Storing trim values, fault codes, and adaptive learning parameters that persist across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed via I²C during boot and runtime diagnostics. Use Value: Enables zero-latency recall of calibrated sensor offsets and actuator compensation tables after cold start. |
Use Scenario: Retaining camera calibration matrices, radar beamforming coefficients, and lane-marking map fragments. IC Role / Device Role / Timing Role: Secure, write-protected memory for safety-critical calibration data updated only during service mode. Use Value: Ensures consistent perception accuracy across vehicle lifetime without reliance on external flash or cloud sync. |
| Body Control Module (BCM) | Infotainment Head Unit |
|
Use Scenario: Saving user preferences (window positions, mirror angles, lighting profiles) and door-lock event logs. IC Role / Device Role / Timing Role: Low-power I²C slave storing infrequently modified settings with minimal MCU intervention. Use Value: Achieves <6 µA standby draw while preserving personalization across battery disconnect events. |
Use Scenario: Holding display gamma LUTs, audio EQ presets, and Bluetooth pairing keys across firmware upgrades. IC Role / Device Role / Timing Role: Dedicated configuration EEPROM isolated from main application flash to prevent corruption during OTA updates. Use Value: Guarantees UI continuity and paired-device persistence even after full system reflash. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics M24C64-WMN6TP | Same 64-Kbit capacity, SOIC-8, and I²C Fast Mode; AEC-Q100 Grade 2 (-40°C to +105°C), not Grade 1 | Limited to cabin modules (not under-hood); lacks full Grade 1 thermal validation | Select when operating ambient stays below +105°C and cost sensitivity outweighs extended temperature margin |
| ON Semiconductor CAT24C64WI-GT3 | 64-Kbit, SOIC-8, 1.7–5.5V; AEC-Q100 Grade 1 qualified but specifies 5 ms max write time only at VCC ≥2.5V | Requires higher minimum VCC for guaranteed 5 ms write timing - may impact low-voltage brownout resilience | Prefer where system VCC remains ≥2.5V during all operational phases, including cranking transients |
Compared with AT24C64D-SSPD-T, the M24C64-WMN6TP offers identical footprint and interface but trades Grade 1 qualification for lower cost, while the CAT24C64WI-GT3 matches thermal grade but imposes stricter voltage constraints on write-cycle timing - making AT24C64D-SSPD-T the most balanced choice for full-spectrum automotive deployment.
Availability
AT24C64D-SSPD-T is available at Aetrix Electronics and suitable for engine control units, ADAS sensors, and body control modules requiring stable component supply across extended automotive product lifecycles.
Supply support for AT24C64D-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 for industrial, automotive, and communications markets.
The AT24C64D-SSPD-T belongs to Microchip's automotive-qualified serial EEPROM family, designed specifically for reliable nonvolatile data storage in harsh-temperature, high-reliability vehicle subsystems.
FAQ
What is the AEC-Q100 qualification grade for AT24C64D-SSPD-T?
The AT24C64D-SSPD-T is AEC-Q100 qualified to Grade 1, meaning it is tested and certified for continuous operation from -40°C to +125°C - meeting requirements for under-hood automotive applications such as engine control and transmission modules. This qualification covers thermal cycling, high-temperature operating life, and electrostatic discharge robustness per the AEC-Q100 standard. The AT24C64D-SSPD-T datasheet (DS20006271A) explicitly lists Grade 1 performance limits in Section 4.2.
Does AT24C64D-SSPD-T support I²C Fast Mode at 400 kHz across its full voltage and temperature range?
Yes, AT24C64D-SSPD-T supports I²C Fast Mode (400 kHz) across its entire specified operating range: 1.7V–5.5V supply and -40°C to +125°C ambient. AC timing parameters including tLOW (≥1.2 µs), tHIGH (≥0.6 µs), and tSU.STA (≥600 ns) are guaranteed under these conditions per Table 4-3 in the official datasheet. No derating is required for automotive-grade operation.
How does the write-protect (WP) pin function on AT24C64D-SSPD-T?
On AT24C64D-SSPD-T, the WP pin is an active-high hardware lock: when tied to VCC, it inhibits all write operations to the entire 64-Kbit memory array; when tied to GND, normal read/write access is enabled. If left floating, the pin is internally pulled down to GND, enabling writes - but Microchip recommends hardwiring WP to a known state to avoid noise-induced glitches. This behavior is documented in Section 2.5 and Table 2-2 of DS20006271A.
What is the maximum write cycle time for AT24C64D-SSPD-T, and is it affected by voltage or temperature?
The maximum write cycle time for AT24C64D-SSPD-T is 5 ms, and this value is guaranteed across the full operating range - including 1.7V supply and -40°C to +125°C temperature. The device uses an internal charge pump and self-timed erase/write sequence, so no external timeout extension is needed. This specification is confirmed in Table 4-3 (tWR) and Section 7.4 of the DS20006271A datasheet.
Can AT24C64D-SSPD-T be used in place of AT24C64D-SSHM-T, and what is the difference between them?
AT24C64D-SSPD-T and AT24C64D-SSHM-T share identical electrical specifications, memory organization, and AEC-Q100 Grade 1 qualification - differing only in package: SSPD-T is 8-lead SOIC (150 mil), while SSHM-T is 8-lead TSSOP (4.4 mm width). They are functionally interchangeable in designs where board layout accommodates the respective footprint and thermal profile. Pinout, timing, and addressing are fully compatible per Section 1 and Table 2-1 of DS20006271A.
AT24C64D-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:
- 64Kbit
- Memory Organization:
- 8K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- 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
AT24C64D-SSPD-T FAQ
1.How can I place an order for AT24C64D-SSPD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64D-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 AT24C64D-SSPD-T reliable?
The price and inventory of AT24C64D-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 AT24C64D-SSPD-T is usually 5 days.
3.What payment methods are accepted for AT24C64D-SSPD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64D-SSPD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64D-SSPD-T?
AT24C64D-SSPD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64D-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 AT24C64D-SSPD-T?
For technical support, including AT24C64D-SSPD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64D-SSPD-T requirements.
6.How does Aetrix verify that AT24C64D-SSPD-T is sourced from the original manufacturer or authorized distributors?
All AT24C64D-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 AT24C64D-SSPD-T meets industry standards.
7.What is the process for return or replacement of AT24C64D-SSPD-T?
All AT24C64D-SSPD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64D-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 AT24C64D-SSPD-T part is unused and in its original packaging.
Return procedure for AT24C64D-SSPD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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