My Inquiry
My Account
Microchip Technology AT24C32D-MAPD-T
- Part No.:
- AT24C32D-MAPD-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
AT24C32D-MAPD-T.pdf
- Description:
- IC EEPROM 32KBIT I2C 1MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,895
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT24C32D-MAPD-T from Microchip Technology is a 32-Kbit I²C-compatible automotive-grade serial EEPROM organized as 4,096 × 8 bits, operating from 1.7V to 5.5V (Grade 3), rated for -40°C to +85°C, and qualified to AEC-Q100. It features hardware write protection (WP pin), 32-byte page write mode with ≤5 ms self-timed write cycle, and ultra-low standby current (≤6 μA), deployed in vehicle body control modules for configuration storage.
For engineers reviewing the AT24C32D-MAPD-T datasheet, AT24C32D-MAPD-T pinout, AT24C32D-MAPD-T application, or AT24C32D-MAPD-T equivalent, key selection criteria include I²C fast-mode (400 kHz) timing compliance, SOT23-5 package footprint compatibility, Grade 3 temperature range validation, and WP pin-driven hardware data protection implementation.
Technical Context
The AT24C32D-MAPD-T implements a two-wire I²C slave interface with Schmitt-triggered, filtered SCL/SDA inputs for noise immunity in automotive environments. Its internal architecture includes a 128-page × 32-byte memory array, address comparator for A0–A2 hardware addressing, and high-voltage generation circuit enabling byte/page writes without external programming voltage.
It supports standard-mode (100 kHz) and fast-mode (400 kHz) clock rates, enforces strict AC timing (e.g., tLOW min 1200 ns at 400 kHz), and enters Standby mode after Stop condition or power-up reset - with tPUP = 100 µs minimum delay before first command acceptance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 32 Kbit (4,096 × 8), directly usable as nonvolatile parameter storage without external address latches |
| Supply voltage range | 1.7V to 5.5V - supports wide-input automotive power rails including 3.3V and 5V systems |
| Operating temperature | -40°C to +85°C (Grade 3) - validated for under-hood and cabin electronics per AEC-Q100 |
| I²C interface speed | Up to 400 kHz Fast mode - enables <2.5 ms typical random read latency for real-time calibration access |
| Write endurance | 1,000,000 cycles - sufficient for firmware update counters or wear-leveling in telematics loggers |
| Data retention | 100 years at 55°C - ensures lifetime validity of VIN, calibration IDs, and security keys across vehicle service life |
| Standby current | ≤6 μA at 5.0V - minimizes parasitic drain in always-on ECU sleep states |
| Page write time | ≤5 ms max self-timed cycle - eliminates need for polling delay in boot-time configuration writes |
Pinout & Package
AT24C32D-MAPD-T is supplied in a 5-lead SOT23 package (JEDEC MO-178AA), with lead pitch 0.95 mm and body dimensions 2.9 mm × 1.6 mm × 1.1 mm. This compact footprint suits space-constrained automotive PCB layouts such as mirror control or seat module boards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL | Serial Clock input | Asynchronous master-controlled clock; rising edge latches input data, falling edge clocks out data - requires external pull-up resistor ≤10 kΩ |
| GND | Ground reference | System return path for VCC and all I/O; must be low-impedance connection to avoid noise coupling into SDA/SCL |
| SDA | Bidirectional open-drain data line | Shared bus line supporting wire-OR topology; requires external pull-up; driven low by either master or slave during ACK/NACK |
| WP | Hardware write-protect enable | Logic-high (VCC) disables all writes to entire memory array; floating defaults to GND (write-enabled) but external tie-off recommended |
| VCC | Power supply input | Supplies core logic and EEPROM array; must ramp monotonically at ≤0.1 V/µs; stable ≥100 µs before first I²C command |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 3 qualification | Validated reliability for automotive production use - eliminates need for additional qualification testing in Tier 1 designs |
| 32-byte page write with partial writes | Enables efficient storage of variable-length records (e.g., sensor offset tables) without full-page erasure overhead |
| Schmitt-triggered, filtered inputs | Rejects >50 ns noise spikes on SCL/SDA - critical for robust operation in electrically noisy engine bay environments |
| Internal device address pins (A0–A2) | Supports up to 8 devices on one I²C bus - simplifies multi-node architectures like door module clusters |
| Ultra-low 6 μA standby current | Reduces quiescent power in always-on ECUs - extends battery life in parked vehicle scenarios beyond ISO 8859-3 limits |
| Green RoHS-compliant packaging | Lead-free, halide-free UDFN/SOT23 options meet global automotive environmental mandates without solderability compromise |
Applications
| Body Control Module | Instrument Cluster |
|---|---|
|
Use Scenario: Storing user-configurable settings (mirror position, seat memory, lighting preferences) that persist across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration register - accessed via I²C during boot initialization and runtime updates. Use Value: Enables personalized vehicle experience without requiring backup battery; 100-year data retention guarantees setting persistence over full vehicle lifetime. |
Use Scenario: Holding odometer values, warning lamp history, and calibration coefficients for analog gauges and LCD backlight drivers. IC Role / Device Role / Timing Role: Tamper-resistant event logger - writes triggered by CAN message interrupts or periodic system checks. Use Value: Survives 1M+ write cycles required for daily mileage logging; WP pin prevents accidental overwrites during firmware updates. |
| Telematics Control Unit | ADAS Camera Module |
|
Use Scenario: Caching GPS almanac data, network APN credentials, and firmware update metadata during cellular connectivity outages. IC Role / Device Role / Timing Role: Low-power auxiliary memory - accessed only during wake-up events to minimize system energy budget. Use Value: 6 μA standby current extends sleep-mode duration between GNSS fixes; 400 kHz I²C enables rapid credential reload upon network reacquisition. |
Use Scenario: Storing lens distortion correction parameters, white balance offsets, and sensor-specific gain tables calibrated at factory. IC Role / Device Role / Timing Role: Factory-programmed calibration repository - read once at power-on and loaded into image signal processor registers. Use Value: Eliminates need for external OTP or flash; AEC-Q100 qualification ensures parameter integrity under thermal cycling in front-end camera housings. |
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-WMN6TP | Same 32-Kbit I²C EEPROM, but rated -40°C to +105°C (not AEC-Q100); 1.8V–5.5V supply; SO8 only | Lacks automotive qualification; unsuitable for safety-critical or OEM-specified Grade 3 deployments | Select only for industrial or consumer applications where AEC-Q100 is not mandated |
| ON Semiconductor CAT24C32HU4I-GT3 | 32-Kbit I²C EEPROM, AEC-Q100 Grade 2 (-40°C to +105°C), 1.7V–5.5V, offered in SOT23-5 | Higher temperature grade than AT24C32D-MAPD-T but no WP pin - requires software-only write protection | Prefer when extended temperature margin is needed and hardware write lock is not required |
Compared with M24C32-WMN6TP and CAT24C32HU4I-GT3, the AT24C32D-MAPD-T uniquely combines AEC-Q100 Grade 3 qualification, SOT23-5 packaging, and dedicated WP pin - making it the only option meeting OEM requirements for compact, hardware-protected EEPROM in cost-sensitive body electronics.
Availability
AT24C32D-MAPD-T is available at Aetrix Electronics and suitable for automotive body control, instrument cluster, and telematics applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for PPAP documentation.
Supply support for AT24C32D-MAPD-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 leading provider of microcontrollers, analog components, and memory solutions, with deep expertise in automotive-grade silicon and functional safety design.
The AT24C32D-MAPD-T belongs to Microchip's AEC-Q100-qualified serial EEPROM product line, engineered specifically for reliable nonvolatile data storage in automotive subsystems operating under harsh electrical and thermal conditions.
FAQ
What is the package type and pin count of the AT24C32D-MAPD-T?
The AT24C32D-MAPD-T uses a 5-lead SOT23 package (JEDEC MO-178AA) with pins assigned as SCL, GND, SDA, WP, and VCC. This compact footprint is exclusive to the AT24C32D variant and enables high-density placement in space-constrained automotive PCBs such as door modules and sensor nodes. The AT24C32D-MAPD-T does not share pinout with 8-lead SOIC or TSSOP versions.
Does the AT24C32D-MAPD-T support both standard-mode and fast-mode I²C communication?
Yes, the AT24C32D-MAPD-T fully supports I²C Standard mode (100 kHz) and Fast mode (400 kHz), with verified AC timing parameters including tLOW (min 1200 ns at 400 kHz) and tHIGH (min 600 ns). These specifications ensure interoperability with common automotive microcontrollers such as Renesas RH850 and NXP S32K families without bus timing violations.
How is hardware write protection implemented on the AT24C32D-MAPD-T?
Hardware write protection on the AT24C32D-MAPD-T is controlled by the WP (Write-Protect) pin: when tied to VCC, all memory writes are inhibited; when tied to GND, normal write operations are enabled. The pin has an internal pull-down, but Microchip recommends hard-wiring WP to a known state to prevent noise-induced corruption - a critical safeguard in automotive CAN/LIN gateway applications where the AT24C32D-MAPD-T stores secure configuration data.
What is the maximum write cycle time for the AT24C32D-MAPD-T, and does it require polling?
The AT24C32D-MAPD-T has a maximum self-timed write cycle time of 5 ms for both byte and page writes. While acknowledge polling is supported to detect completion, the fixed 5 ms upper bound allows deterministic timeout-based handling - eliminating complex polling loops in safety-critical boot code where the AT24C32D-MAPD-T initializes ECU configuration registers.
Is the AT24C32D-MAPD-T qualified to AEC-Q100, and which grade does it meet?
Yes, the AT24C32D-MAPD-T is AEC-Q100 qualified to Grade 3, specifying operation from -40°C to +85°C and including stress testing for reliability in automotive environments. This qualification is documented in Microchip's official DS20006271A datasheet and applies specifically to the AT24C32D-MAPD-T SOT23-5 variant - not inferred from family-level claims.
AT24C32D-MAPD-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- 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-UDFN (2x3)
AT24C32D-MAPD-T FAQ
1.How can I place an order for AT24C32D-MAPD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32D-MAPD-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-MAPD-T reliable?
The price and inventory of AT24C32D-MAPD-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-MAPD-T is usually 5 days.
3.What payment methods are accepted for AT24C32D-MAPD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32D-MAPD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32D-MAPD-T?
AT24C32D-MAPD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32D-MAPD-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-MAPD-T?
For technical support, including AT24C32D-MAPD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32D-MAPD-T requirements.
6.How does Aetrix verify that AT24C32D-MAPD-T is sourced from the original manufacturer or authorized distributors?
All AT24C32D-MAPD-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-MAPD-T meets industry standards.
7.What is the process for return or replacement of AT24C32D-MAPD-T?
All AT24C32D-MAPD-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32D-MAPD-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-MAPD-T part is unused and in its original packaging.
Return procedure for AT24C32D-MAPD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C32D-MAPD-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…
