My Inquiry
My Account
Microchip Technology AT24C32D-STPD-TVAO
- Part No.:
- AT24C32D-STPD-TVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
AT24C32D-STPD-TVAO.pdf
- Description:
- IC EEPROM 32KBIT I2C TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,211
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT24C32D-STPD-TVAO 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 capability, and ultra-low standby current of 6 μA max - deployed in body control modules, sensor calibration storage, and infotainment configuration memory.
For engineers reviewing the AT24C32D-STPD-TVAO datasheet, AT24C32D-STPD-TVAO pinout, AT24C32D-STPD-TVAO application, or AT24C32D-STPD-TVAO equivalent, key selection criteria include I²C fast-mode (400 kHz) timing compliance, SOT23-5 package footprint, Grade 3 temperature range suitability, and hardware WP-driven data integrity in automotive subsystems.
Technical Context
The AT24C32D-STPD-TVAO implements a two-wire I²C slave interface with Schmitt-triggered, noise-filtered SCL/SDA inputs and an open-drain SDA output requiring external pull-up. Its internal architecture includes a 128-page × 32-byte memory array, addressable via three hardware pins (A0–A2), and a dedicated Write-Protect (WP) input that disables all writes when pulled high.
It supports random and sequential reads, byte/page writes, and self-timed internal write cycles completing within 5 ms. Power management includes a POR circuit enforcing tPUP ≥ 100 µs after VCC stabilization and standby current as low as 0.1 µA at 1.7V - optimized for always-on automotive nodes with strict quiescent power budgets.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32 Kbit (4,096 × 8), organized in 128 pages of 32 bytes - enables efficient firmware parameter storage with partial-page write flexibility. |
| Supply Voltage Range | 1.7V to 5.5V (Grade 3) - supports direct connection to 1.8V, 3.3V, and 5V automotive domains without level shifting. |
| Operating Temperature | -40°C to +85°C - meets AEC-Q100 Grade 3 requirements for under-hood and cabin electronics. |
| I²C Speed Modes | Standard mode (100 kHz) and Fast mode (400 kHz) - compatible with legacy and modern microcontroller I²C peripherals. |
| Write Endurance | 1,000,000 cycles - ensures reliable logging and calibration updates over full vehicle lifetime. |
| Data Retention | 100 years at 55°C - guarantees long-term integrity of safety-critical configuration data without refresh. |
| Standby Current | Max 6 μA at 5.0V - minimizes battery drain in always-on ECU sleep states. |
| Write Cycle Time | Max 5 ms per page - enables deterministic timeout handling in real-time firmware. |
Pinout & Package
AT24C32D-STPD-TVAO is supplied in a 5-lead SOT23 package - compact, surface-mount, and optimized for space-constrained automotive PCBs. Pin 1 is SCL; Pin 2 is GND; Pin 3 is SDA; Pin 4 is VCC; Pin 5 is WP. No A0/A1/A2 pins are present in this variant - device address is fixed to 0x50 (1010000b) per datasheet Section 2 and Table 2-1 footnote 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL (Pin 1) | Serial Clock Input | Asynchronous master-controlled clock; rising edge latches input data, falling edge outputs data - requires external pull-up and noise filtering per AEC-Q100 robustness. |
| GND (Pin 2) | Ground Reference | System return path for VCC and I/O; must be low-impedance connection to minimize ground bounce in noisy automotive environments. |
| SDA (Pin 3) | Open-Drain Bidirectional Data Line | Shared bus line for command/data transfer; requires external pull-up ≤10 kΩ and supports wire-OR with other I²C slaves. |
| VCC (Pin 4) | Power Supply Input | Supplies core logic and EEPROM array; must ramp monotonically at ≤0.1 V/µs during power-up to ensure proper POR behavior. |
| WP (Pin 5) | Hardware Write-Protect Input | Logic-high disables all write operations - used to lock calibration data during vehicle operation; internally pulled down if floating. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified (Grade 3) | Validated for automotive use with extended temperature (-40°C to +85°C), ESD (>3 kV HBM), and reliability testing - eliminates need for additional qualification effort. |
| Fixed 5-lead SOT23 Package | No A0/A1/A2 pins simplifies layout and eliminates address conflict risk - ideal for single-device applications like sensor modules or actuator calibration storage. |
| Hardware Write Protection (WP) | Dedicated pin enables fail-safe, non-volatile lock of critical parameters - prevents accidental overwrites during firmware updates or diagnostics. |
| Ultra-Low Standby Current (≤6 μA) | Enables >10-year battery-backed operation in telematics or keyless entry systems - meets ISO 16750-2 quiescent current targets. |
| Self-Timed 5 ms Write Cycle | Removes need for software polling delays - allows deterministic state-machine design in safety-critical bootloaders and configuration managers. |
| Schmitt Trigger + Noise Filtering | Integrated input conditioning rejects >100 ns spikes on SCL/SDA - improves I²C bus resilience in high-EMI engine compartments. |
Applications
| Body Control Module (BCM) | Occupant Detection System |
|---|---|
|
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles tied to driver ID. IC Role / Device Role / Timing Role: Non-volatile configuration storage accessed via I²C during power-up and user adjustment - retains settings across ignition cycles. Use Value: Enables personalized vehicle experience without external backup power; WP pin prevents corruption during CAN-based reprogramming events. |
Use Scenario: Recording calibration offsets for weight sensors and capacitive touch pads in front passenger seat. IC Role / Device Role / Timing Role: Persistent calibration data repository updated only during factory or service-mode calibration routines. Use Value: Ensures occupant classification accuracy over 15+ years; 1M write endurance supports repeated recalibration during vehicle lifetime. |
| Engine Control Unit (ECU) Subsystem | Automotive Infotainment Configuration |
|
Use Scenario: Holding trim values for fuel injector timing and throttle response maps adjusted during adaptive learning. IC Role / Device Role / Timing Role: Secondary EEPROM for learned parameters - isolated from main flash to avoid wear-out and enable independent update. Use Value: Extends ECU MCU flash lifetime; 5 ms write time aligns with diagnostic session timeouts for seamless service tool integration. |
Use Scenario: Saving user preferences (volume, EQ, display brightness) and Bluetooth pairing IDs across power cycles. IC Role / Device Role / Timing Role: Low-power configuration store accessed during boot sequence and UI interaction - operates at 3.3V with minimal current draw. Use Value: Delivers instant personalization on startup; 100-year data retention eliminates need for cloud sync or battery-backed SRAM. |
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 | 32-Kbit I²C EEPROM, SO8 package, Grade 3, 1.7–5.5V, but lacks SOT23-5 option and has higher max standby current (10 μA). | Requires PCB redesign due to 8-lead SOIC footprint; suitable where board area is not constrained and higher leakage is acceptable. | Select when existing SOIC layout exists and AEC-Q100 Grade 3 compliance is required - not drop-in for AT24C32D-STPD-TVAO's SOT23-5 footprint. |
| ON Semiconductor CAT24C32HU4IGT3 | 32-Kbit I²C EEPROM, UDFN-8 package, Grade 3, 1.7–5.5V, includes A0/A1/A2 pins - no fixed-address SOT23 variant available. | Supports multi-device bus configurations but demands additional address routing; incompatible pinout and package size. | Choose for designs needing address flexibility and space-saving UDFN, but requires layout revision and address management logic. |
Compared with M24C32-WMN6TP and CAT24C32HU4IGT3, AT24C32D-STPD-TVAO uniquely delivers AEC-Q100 Grade 3 performance in a 5-pin SOT23 with fixed 0x50 address - eliminating layout complexity and enabling direct replacement in tight-space automotive nodes where pin count and footprint are critical.
Availability
AT24C32D-STPD-TVAO is available at Aetrix Electronics and suitable for automotive body control, sensor calibration, and infotainment configuration applications requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for AT24C32D-STPD-TVAO 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 deep expertise in automotive-grade ICs and functional safety design.
The AT24C32D-STPD-TVAO belongs to Microchip's automotive serial EEPROM product line, engineered specifically for robust, low-power non-volatile storage in harsh-temperature automotive subsystems - emphasizing AEC-Q100 qualification, noise immunity, and long-term data integrity.
FAQ
What is the device address of AT24C32D-STPD-TVAO on the I²C bus?
The AT24C32D-STPD-TVAO uses a fixed 7-bit device address of 0x50 (1010000b). This is because its SOT23-5 package omits A0, A1, and A2 pins - as confirmed in DS20006271A page 4, Table 2-1 footnote 2. The full 8-bit address byte is 0xA0 for write and 0xA1 for read. No external address configuration is possible, simplifying bus arbitration in single-device implementations.
Does AT24C32D-STPD-TVAO support both 100 kHz and 400 kHz I²C speeds?
Yes, AT24C32D-STPD-TVAO fully supports Standard mode (100 kHz) and Fast mode (400 kHz) I²C operation per DS20006271A Table 4-3. Its AC characteristics guarantee tLOW ≥ 1200 ns and tHIGH ≥ 600 ns at 400 kHz, and it includes Schmitt-triggered, filtered inputs to maintain signal integrity at higher speeds - making it compatible with modern automotive microcontrollers running I²C at maximum rate.
How does the Write-Protect (WP) pin function on AT24C32D-STPD-TVAO?
On AT24C32D-STPD-TVAO, the WP pin (Pin 5) provides hardware-level write inhibition: when pulled high to VCC, all write operations - including byte, page, and erase - are blocked. When grounded, normal writes are enabled. The pin is internally pulled down, but Microchip recommends hard-wiring it to a known state to prevent noise-induced glitches - critical for safeguarding calibration data in automotive ECUs.
What is the maximum write cycle time for AT24C32D-STPD-TVAO?
The maximum write cycle time for AT24C32D-STPD-TVAO is 5 ms, as specified in DS20006271A Table 4-3 and Section 7.4. This applies to both byte and page writes and is self-timed - meaning the device releases the SDA line upon completion, allowing the host to poll via ACK or implement fixed-delay handling. This deterministic timing simplifies real-time firmware integration without complex status polling loops.
Is AT24C32D-STPD-TVAO qualified to AEC-Q100, and which grade?
Yes, AT24C32D-STPD-TVAO is AEC-Q100 qualified to Grade 3, supporting an operating temperature range of -40°C to +85°C - explicitly stated in DS20006271A Features section and Table 4-1. This qualification covers stress testing for temperature cycling, humidity, ESD (>3 kV HBM), and reliability (1M write cycles, 100-year retention), confirming suitability for non-engine-compartment automotive applications such as door modules and dashboard systems.
AT24C32D-STPD-TVAO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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:
- TSOT-23-5
AT24C32D-STPD-TVAO FAQ
1.How can I place an order for AT24C32D-STPD-TVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32D-STPD-TVAO 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-STPD-TVAO reliable?
The price and inventory of AT24C32D-STPD-TVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C32D-STPD-TVAO is usually 5 days.
3.What payment methods are accepted for AT24C32D-STPD-TVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32D-STPD-TVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32D-STPD-TVAO?
AT24C32D-STPD-TVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32D-STPD-TVAO 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-STPD-TVAO?
For technical support, including AT24C32D-STPD-TVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32D-STPD-TVAO requirements.
6.How does Aetrix verify that AT24C32D-STPD-TVAO is sourced from the original manufacturer or authorized distributors?
All AT24C32D-STPD-TVAO 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-STPD-TVAO meets industry standards.
7.What is the process for return or replacement of AT24C32D-STPD-TVAO?
All AT24C32D-STPD-TVAO units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32D-STPD-TVAO, 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-STPD-TVAO part is unused and in its original packaging.
Return procedure for AT24C32D-STPD-TVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C32D-STPD-TVAO 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…
