My Inquiry
My Account
Microchip Technology AT24C32D-STUM-T
- Part No.:
- AT24C32D-STUM-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
AT24C32D-STUM-T.pdf
- Description:
- IC EEPROM 32KBIT I2C SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:11,021
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT24C32D-STUM-T from Microchip Technology is a 32-Kbit I²C-compatible serial EEPROM organized as 4,096 × 8 bits, operating from 1.7V to 5.5V across -40°C to +85°C industrial temperature range, featuring hardware write protection (WP), 32-byte page write mode, and 1 MHz Fast Mode Plus support at ≥2.5V. It serves as nonvolatile configuration storage in microcontroller-based sensor nodes and power management subsystems.
For engineers reviewing the AT24C32D-STUM-T datasheet, AT24C32D-STUM-T pinout, AT24C32D-STUM-T application, or AT24C32D-STUM-T equivalent, key selection criteria include VCC voltage range compatibility, I²C bus speed mode support (100/400/1000 kHz), WP pin functionality for hardware data lock, page write timing (≤5 ms), and industrial-grade reliability (1M write cycles, 100-year data retention).
Technical Context
The AT24C32D-STUM-T implements a standard I²C slave interface with open-drain SDA/SCL pins, Schmitt-triggered inputs, and integrated noise filtering. Its memory array is partitioned into 128 pages of 32 bytes each, supporting partial-page writes and random/sequential read modes.
Device addressing uses a fixed 4-bit type identifier (1010b) plus three hardware-selectable address bits (A0–A2), enabling up to eight devices on one bus. The WP pin provides full-array hardware write inhibition when driven high, and internal pull-downs ensure defined logic states when pins float.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 32 Kbit (4,096 × 8), sufficient for firmware calibration tables or device configuration registers |
| Supply voltage | 1.7V to 5.5V - supports direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifting |
| I²C speed modes | 100 kHz (Std), 400 kHz (Fast), 1 MHz (Fast Mode Plus) - enables high-throughput updates in time-critical systems |
| Write cycle time | ≤5 ms max - ensures predictable latency during configuration saves or event logging |
| Endurance | 1,000,000 write cycles - supports frequent parameter updates in industrial control loops |
| Data retention | 100 years at 55°C - guarantees long-term integrity of stored calibration or security keys |
| Standby current | 6 μA max at 5.0V - minimizes battery drain in always-on IoT edge sensors |
Pinout & Package
AT24C32D-STUM-T is supplied in an 8-pad XDFN package (2.0 mm × 1.6 mm, 0.5 mm pitch) with wettable flank leads for automated optical inspection. Pin 1 is marked by a dot; pin numbering follows standard counter-clockwise orientation from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Hardware device address input | Configures LSB of 3-bit slave address; tied low/high to enable multi-device bus topology |
| A1 | Hardware device address input | Configures middle bit of 3-bit slave address; determines unique I²C address among up to eight devices |
| A2 | Hardware device address input | Configures MSB of 3-bit slave address; required for cascading identical EEPROMs on shared bus |
| GND | Power ground reference | Must be connected to system ground plane; serves as return path for all internal logic and I/O circuits |
| SDA | Serial data bidirectional I/O | Open-drain line requiring external pull-up; carries command, address, and data bits per I²C protocol |
| SCL | Serial clock input | Master-generated clock controlling data sampling edges; must be pulled high when idle |
| WP | Hardware write-protect control | Drives high to disable all writes; prevents accidental overwrites during power transitions or firmware faults |
| VCC | Positive supply voltage | Accepts 1.7–5.5V; powers internal logic, memory array, and I/O buffers; decoupling capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| 32-byte page write mode | Enables efficient burst writes without inter-byte delays; partial-page writes reduce update overhead in fragmented data structures |
| Schmitt-triggered inputs | Rejects bus noise up to 50 ns spikes; eliminates false Start/Stop detection in electrically noisy industrial environments |
| Hardware write protection (WP) | Provides fail-safe data integrity by disabling writes at silicon level-no software vulnerability or timing window |
| Ultra-low standby current (6 μA) | Extends battery life in portable medical monitors or remote environmental sensors where EEPROM remains powered continuously |
| Green RoHS-compliant packaging | Meets lead-free, halide-free requirements for automotive and industrial end-equipment compliance programs |
Applications
| Industrial Sensor Calibration Storage | Smart Meter Configuration Memory |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients and temperature compensation tables for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent calibration parameters accessed at system boot and during field recalibration. Use Value: Enables traceable, field-updatable calibration without requiring reprogramming of host MCU flash or external programming tools. | Use Scenario: Retaining tariff schedules, billing counters, and communication module settings in electricity/water meters operating unattended for >10 years. IC Role / Device Role / Timing Role: Long-life data logger storing critical metering state variables that survive mains power loss and battery depletion. Use Value: Guarantees regulatory-compliant data integrity via 100-year retention and 1M write endurance under daily update cycles. |
| IoT Edge Device Identity Storage | Power Supply Sequencing Configuration |
Use Scenario: Securing unique device identifiers (UID), cryptographic keys, and TLS certificate fingerprints in battery-powered asset trackers. IC Role / Device Role / Timing Role: Tamper-resistant identity vault accessed only during secure boot and TLS handshake initialization sequences. Use Value: Prevents cloning via hardware-enforced write protection (WP pin) and eliminates need for external secure elements in cost-sensitive designs. | Use Scenario: Holding startup delay values, voltage ramp rates, and fault timeout thresholds for multi-rail DC-DC controllers in telecom base stations. IC Role / Device Role / Timing Role: Configuration manager providing dynamic sequencing parameters to PMICs via I²C during power-on reset. Use Value: Allows field-adjustable power-up behavior without PCB respins-critical for interoperability testing across ASIC revisions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C32AN-SSHM-T | Same 32-Kbit capacity and I²C interface, but in 8-lead SOIC package; lacks XDFN's space savings and thermal performance | Preferred for through-hole prototyping or legacy board layouts where SOIC footprint is already allocated | Select when mechanical compatibility with existing SOIC sockets or wave-solder processes is required |
| M24C32-WMN6TP | STMicroelectronics 32-Kbit EEPROM with identical 1.7–5.5V operation and 1 MHz FM+ support, but different AC timing specs (e.g., tLOW = 1.3 μs vs. 500 ns) | Valid for drop-in replacement only after validating timing margins in high-speed I²C master implementations | Choose when dual-sourcing is mandated and layout allows verification of SCL low-time compliance |
Compared with AT24C32D-STUM-T, the AT24C32AN-SSHM-T offers identical electrical behavior in a larger SOIC package ideal for manual assembly, while M24C32-WMN6TP requires timing validation due to differing AC characteristics despite matching core functionality.
Availability
AT24C32D-STUM-T is available at Aetrix Electronics and suitable for industrial sensor calibration storage, smart meter configuration memory, and IoT edge device identity storage requiring stable component supply across extended product lifecycles.
Supply support for AT24C32D-STUM-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 9001-certified manufacturing and global distribution.
The AT24C32D-STUM-T belongs to Microchip's AT24Cxx family of I²C serial EEPROMs, designed specifically for reliable, low-power nonvolatile data storage in space-constrained industrial and automotive systems.
FAQ
What is the maximum I²C clock frequency supported by the AT24C32D-STUM-T?
The AT24C32D-STUM-T supports 100 kHz Standard mode (1.7–5.5V), 400 kHz Fast mode (1.7–5.5V), and 1 MHz Fast Mode Plus (2.5–5.5V). At 1.7–2.4V, only Standard and Fast modes are guaranteed; FM+ requires ≥2.5V to meet tLOW/tHIGH timing specifications per DS20006047A.
How does the write-protect (WP) pin function on the AT24C32D-STUM-T?
When the WP pin of the AT24C32D-STUM-T is driven high (≥0.7×VCC), it disables all write operations-including byte, page, and sequential writes-to the entire memory array. When WP is low or floating (internally pulled down), normal write functionality is enabled. This hardware-level protection operates independently of I²C commands.
What package type is used for the AT24C32D-STUM-T?
The AT24C32D-STUM-T uses an 8-pad XDFN package measuring 2.0 mm × 1.6 mm with 0.5 mm pitch and wettable flank leads. This ultra-compact, leadless package supports automated optical inspection and offers superior thermal dissipation compared to SOIC or TSSOP variants of the same device.
Can the AT24C32D-STUM-T operate reliably at 1.8V supply voltage?
Yes, the AT24C32D-STUM-T is fully specified for 1.7V to 5.5V operation. At 1.8V, it supports 100 kHz and 400 kHz I²C modes with guaranteed tAA (address access time ≤900 ns), ICC (read current ≤1.0 mA), and ISB (standby current ≤1.0 μA), making it suitable for battery-powered 1.8V logic systems.
What is the memory organization of the AT24C32D-STUM-T?
The AT24C32D-STUM-T organizes its 32,768 bits as 4,096 words of 8 bits each, structured into 128 pages of 32 bytes. This layout enables efficient page-write operations and supports both random and sequential read modes, with word addressing requiring two 8-bit address bytes (A11–A0) per I²C transaction.
AT24C32D-STUM-T 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:
- 550 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
AT24C32D-STUM-T FAQ
1.How can I place an order for AT24C32D-STUM-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32D-STUM-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-STUM-T reliable?
The price and inventory of AT24C32D-STUM-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-STUM-T is usually 5 days.
3.What payment methods are accepted for AT24C32D-STUM-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32D-STUM-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32D-STUM-T?
AT24C32D-STUM-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32D-STUM-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-STUM-T?
For technical support, including AT24C32D-STUM-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32D-STUM-T requirements.
6.How does Aetrix verify that AT24C32D-STUM-T is sourced from the original manufacturer or authorized distributors?
All AT24C32D-STUM-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-STUM-T meets industry standards.
7.What is the process for return or replacement of AT24C32D-STUM-T?
All AT24C32D-STUM-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32D-STUM-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-STUM-T part is unused and in its original packaging.
Return procedure for AT24C32D-STUM-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C32D-STUM-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…
