My Inquiry
My Account
Microchip Technology AT24C32A-10TU-1.8
- Part No.:
- AT24C32A-10TU-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT24C32A-10TU-1.8.pdf
- Description:
- IC EEPROM 32KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,282
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT24C32A-10TU-1.8 from Microchip Technology (formerly Atmel) is a 32-kbit I²C-compatible serial EEPROM with 4096 × 8-bit organization, 1.8V to 5.5V supply range, 400 kHz interface speed, and TSSOP-8 package. It delivers hardware write protection via WP pin, 32-byte page write capability, and 1 million endurance cycles for embedded configuration storage in low-power industrial systems.
For engineers reviewing the AT24C32A-10TU-1.8 datasheet, AT24C32A-10TU-1.8 pinout, AT24C32A-10TU-1.8 application, or AT24C32A-10TU-1.8 equivalent, key selection factors include its 1.8V minimum operating voltage, TSSOP-8 footprint compatibility, I²C address flexibility (A0–A2), WP-enabled data security, and guaranteed 100-year data retention at 85°C.
Technical Context
The AT24C32A-10TU-1.8 implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain bidirectional data transfer. Its internal architecture supports cascading up to eight devices on one bus using A0–A2 address pins.
It operates across –40°C to +85°C with standby current as low as 1.0 µA at 1.8V, self-timed write cycles ≤5 ms, and page-write mode enabling burst writes of up to 32 bytes without intermediate stop conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 bits (4096 × 8), enabling storage of firmware calibration tables or device configuration parameters |
| Supply Voltage Range | 1.8V to 5.5V - supports direct interfacing with 1.8V logic microcontrollers without level shifting |
| I²C Clock Frequency | Up to 400 kHz - compatible with standard-mode I²C controllers in industrial and consumer applications |
| Write Endurance | 1 million cycles - suitable for frequent parameter updates such as energy meter tariff logs or sensor offset adjustments |
| Data Retention | 100 years at 85°C - ensures long-term reliability in unattended equipment like smart utility meters |
| Standby Current | 1.0 µA at 1.8V - minimizes battery drain in always-on IoT edge nodes and portable instrumentation |
| Page Write Size | 32 bytes - allows efficient bulk writes while avoiding cross-page wrap-around errors during partial updates |
Pinout & Package
AT24C32A-10TU-1.8 uses an 8-lead TSSOP (8A2) package measuring 4.4 mm body width, 3.0 mm depth, and 0.65 mm lead pitch. Pin 1 is marked by a corner notch; leads are RoHS-compliant, lead-free, and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or pulled high/low to configure one of eight unique I²C addresses (0x50–0x57) on shared bus |
| SDA | Serial Data I/O | Open-drain bidirectional line requiring external pull-up; supports wire-OR with other I²C peripherals |
| SCL | Serial Clock Input | Positive-edge clock input for data-in; negative-edge sampling for data-out; filtered for EMI resilience |
| WP | Hardware Write Protect | Active-high signal that disables all memory writes when tied to VCC - prevents accidental overwrites during power transitions |
| GND | Ground Reference | Primary return path for VCC and I/O; must be low-impedance to maintain noise immunity in mixed-signal PCBs |
| VCC | Power Supply | Accepts 1.8–5.5V; internal regulation enables stable operation across wide input range without external LDO |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 1.8V supply - eliminates need for voltage translators when interfacing with ultra-low-power MCUs like MSP430FRxx or nRF52840 |
| Schmitt Trigger Inputs | Input hysteresis on SDA/SCL suppresses >50 ns noise spikes - improves robustness in electrically noisy motor-control or industrial PLC environments |
| 32-Byte Page Write | Enables atomic multi-byte updates without software overhead - critical for preserving integrity of calibration coefficients or network keys |
| Hardware Write Protect | WP pin provides fail-safe memory lockdown independent of firmware state - essential for safety-critical boot configuration storage |
| 100-Year Data Retention | Validated at 85°C - guarantees nonvolatile storage integrity over full product lifecycle in sealed enclosures without thermal derating |
Applications
| Smart Energy Meters | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Storing tariff schedules, metering registers, and cryptographic keys in DIN-rail mounted electricity meters operating continuously at 60°C ambient. IC Role / Device Role / Timing Role: Nonvolatile configuration and event-log storage with guaranteed 100-year retention and 1M write cycles under daily firmware update routines. Use Value: Eliminates need for external backup capacitors or supercapacitors by maintaining data integrity through brownout events and extended power loss. | Use Scenario: Holding module identification, calibration offsets, and channel-specific gain settings in modular analog input/output cards used in factory automation systems. IC Role / Device Role / Timing Role: Persistent parameter storage accessible via I²C at 400 kHz, synchronized to main controller's polling cycle without interrupt latency. Use Value: Enables hot-swap reconfiguration: each module retains its identity and calibration even after removal and reinsertion into different slots. |
| Medical Diagnostic Handhelds | Automotive Body Control Units |
Use Scenario: Saving user preferences, sensor calibration history, and diagnostic fault logs in portable ultrasound or blood glucose analyzers powered by coin-cell batteries. IC Role / Device Role / Timing Role: Ultra-low-power EEPROM supporting <1 µA standby current at 1.8V - extends battery life beyond 5 years in sleep-dominated usage profiles. Use Value: Reduces BOM count by integrating secure, low-leakage nonvolatile storage directly on sensor subsystem PCBs. | Use Scenario: Storing seat position memory, mirror angle presets, and lighting configuration in automotive door modules exposed to –40°C to +105°C ambient extremes. IC Role / Device Role / Timing Role: Industrial-grade EEPROM qualified for –40°C to +85°C operation with 1.8V compatibility - interfaces directly with 1.8V CAN transceiver power domains. Use Value: Avoids level-shifting circuitry and associated board space, cost, and failure points in space-constrained door module designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M24C32-WMN6TP | 32K I²C EEPROM, 1.7–5.5V, SO8 package, 400 kHz, 1M endurance, but no internal address pin pull-down - requires external A0–A2 termination | SO8 footprint differs from TSSOP-8; lacks internal floating-pin biasing for A0–A2 and WP - increases external component count | Select when SOIC layout reuse is prioritized and external pull resistors are acceptable |
| BR24G32FJ-3GE2 | 32K I²C EEPROM, 1.6–5.5V, TSSOP-8, 1M endurance, but only 100-year retention specified at 25°C - not validated at 85°C | Same TSSOP-8 footprint and pinout; however, high-temp data retention unverified - limits use in thermally stressed automotive or industrial deployments | Select for cost-sensitive consumer applications where ambient temperature remains below 50°C |
Compared with AT24C32A-10TU-1.8, M24C32-WMN6TP requires external address termination and offers SOIC packaging, while BR24G32FJ-3GE2 matches the TSSOP-8 form factor but lacks 85°C-rated data retention - making AT24C32A-10TU-1.8 the only option fully validated for industrial thermal profiles with integrated pin biasing.
Availability
AT24C32A-10TU-1.8 is available at Aetrix Electronics and suitable for smart metering, industrial PLC I/O modules, medical handheld diagnostics, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT24C32A-10TU-1.8 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 acquired Atmel in 2016 and maintains full product continuity, qualification, and support for the AT24Cxx EEPROM family. The company specializes in reliable, low-power semiconductor solutions for industrial, automotive, and communications markets.
The AT24C32A series was designed specifically for robust, low-voltage serial configuration storage in space-constrained embedded systems - emphasizing write endurance, data retention, and noise-immune I²C interoperability.
FAQ
What is the maximum I²C clock frequency supported by the AT24C32A-10TU-1.8?
The AT24C32A-10TU-1.8 supports up to 400 kHz I²C clock frequency across its full 1.8V to 5.5V supply range and –40°C to +85°C temperature range. This is verified in Table 4 of the official datasheet (3054T–SEEPR–1/07) under AC Characteristics, with tLOW ≥1.2 µs and tHIGH ≥0.6 µs timing compliance. The device does not support fast-mode (1 MHz) or high-speed mode.
Does the AT24C32A-10TU-1.8 require external pull-up resistors on SDA and SCL lines?
Yes, the AT24C32A-10TU-1.8 requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. The datasheet specifies typical values of 2.2 kΩ to 10 kΩ depending on bus capacitance and desired rise time. Internal pull-ups are not provided; reliance on external resistors ensures compatibility with mixed-voltage I²C buses and configurable slew rate control.
How does the write protect (WP) pin function on the AT24C32A-10TU-1.8?
When the WP pin of the AT24C32A-10TU-1.8 is driven high to VCC, all write operations - including byte, page, and sequential writes - are inhibited. When WP is grounded or left floating (with <3 pF coupling to VCC), writes are enabled. The internal weak pull-down ensures safe default behavior. This hardware-level protection operates independently of I²C commands and remains active during power-up sequencing.
What is the memory organization of the AT24C32A-10TU-1.8?
The AT24C32A-10TU-1.8 contains 32,768 bits organized as 4096 words of 8 bits each, internally segmented into 128 pages of 32 bytes. Addressing uses a 12-bit word address (0x0000–0x0FFF). Page boundaries align every 32 bytes, and page write operations automatically increment the lower 5 address bits while holding upper bits constant - enabling efficient burst writes within a single page.
Is the AT24C32A-10TU-1.8 qualified for automotive applications?
No, the AT24C32A-10TU-1.8 is specified for industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. While it may operate in some automotive subsystems, Microchip explicitly states in the datasheet disclaimer that "Atmel's products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life." For automotive use, designers should select AEC-Q100 qualified alternatives such as the AT24C32AN-10SU-2.7 or dedicated automotive EEPROMs.
AT24C32A-10TU-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
AT24C32A-10TU-1.8 FAQ
1.How can I place an order for AT24C32A-10TU-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32A-10TU-1.8 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 AT24C32A-10TU-1.8 reliable?
The price and inventory of AT24C32A-10TU-1.8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C32A-10TU-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C32A-10TU-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32A-10TU-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32A-10TU-1.8?
AT24C32A-10TU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32A-10TU-1.8 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 AT24C32A-10TU-1.8?
For technical support, including AT24C32A-10TU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32A-10TU-1.8 requirements.
6.How does Aetrix verify that AT24C32A-10TU-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C32A-10TU-1.8 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 AT24C32A-10TU-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C32A-10TU-1.8?
All AT24C32A-10TU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32A-10TU-1.8, 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 AT24C32A-10TU-1.8 part is unused and in its original packaging.
Return procedure for AT24C32A-10TU-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C32A-10TU-1.8 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…
