My Inquiry
My Account
Microchip Technology AT24C1024B-TH25-T
- Part No.:
- AT24C1024B-TH25-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT24C1024B-TH25-T.pdf
- Description:
- IC EEPROM 1MBIT I2C 1MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,624
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT24C1024B-TH25-T from Microchip Technology (formerly Atmel) is a 1 Mbit (131,072 × 8) two-wire serial EEPROM optimized for low-voltage industrial applications. It operates from 2.5V to 5.5V, supports 1 MHz clock rate at 2.5V/5V, features hardware write protection via WP pin, and uses 8-lead TSSOP package with NiPdAu lead finish.
For engineers reviewing the AT24C1024B-TH25-T datasheet, AT24C1024B-TH25-T pinout, AT24C1024B-TH25-T application, or AT24C1024B-TH25-T equivalent, key selection criteria include voltage range compatibility (2.5V–5.5V), 1 MHz I²C timing support, 256-byte page write capability, 40-year data retention, and TSSOP-8 mechanical fit in space-constrained embedded systems.
Technical Context
The AT24C1024B-TH25-T implements a standard two-wire (I²C-compatible) serial interface with open-drain SDA/SCL pins, Schmitt-triggered inputs, and noise-filtered logic. It uses a cascaded addressing scheme with A1/A2 device address inputs enabling up to four devices on one bus.
Internally organized as 512 pages of 256 bytes each, it supports byte and page write modes, random/sequential read operations, and self-timed 5 ms typical write cycles. Write protection is enforced via dedicated WP pin or software-controlled lock.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1,048,576 bits (131,072 × 8), sufficient for firmware parameter storage or calibration data in industrial controllers |
| Supply Voltage Range | 2.5V to 5.5V - compatible with 3.3V and 5V system rails without level shifting |
| I²C Clock Rate | Up to 1 MHz at 2.5V/5V - enables faster configuration loading vs. legacy 400 kHz EEPROMs |
| Page Write Capacity | 256-byte page writes - reduces I²C transaction count for bulk updates, improving system efficiency |
| Data Retention | 40 years at +25°C - ensures long-term reliability in unattended equipment like smart meters or PLC modules |
| Endurance | 1,000,000 write cycles per page - supports frequent logging or runtime configuration changes |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient conditions without derating |
Pinout & Package
AT24C1024B-TH25-T is supplied in an 8-lead Thin Shrink Small Outline Package (TSSOP), 4.4 mm body width, with NiPdAu lead finish. Pin 1 is marked by a dot at the top-left corner of the package bottom view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Accepts 2.5V–5.5V; must be decoupled locally to suppress I²C switching noise |
| WP | Hardware write protect | Pulled high to VCC to disable all writes; floating defaults to GND (write enabled) |
| SCL | Serial clock input | Positive-edge triggered; requires external pull-up; supports 1 MHz max frequency |
| SDA | Serial data bidirectional I/O | Open-drain output; requires external pull-up; wire-ORable with other I²C devices |
| NC | No connect | Not internally bonded; must remain unconnected on PCB |
| A1, A2 | Device address inputs | Hardwire to VCC/GND or leave floating (internally pulled down); configure 2-bit slave address |
| GND | Ground reference | Return path for VCC and signal logic; should be low-impedance plane connection |
Key Features
| Feature | Design Value |
|---|---|
| Two-wire serial interface | Fully compatible with I²C protocol, reducing PCB routing complexity vs. parallel EEPROMs |
| 256-byte page write mode | Minimizes host MCU I²C overhead during firmware update or log buffer writes |
| Schmitt-triggered inputs | Improves noise immunity on SCL/SDA lines in electrically noisy industrial environments |
| Write protect pin (WP) | Enables hardware-level memory lockdown during normal operation, preventing accidental corruption |
| 17-bit addressing | Supports full 1 Mbit address space access with single-word or burst reads across page boundaries |
Applications
| Industrial PLC Configuration Storage | Smart Energy Meter Calibration Data |
|---|---|
Use Scenario: Storing user-configurable I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed via I²C during boot and runtime; retains settings across power cycles. Use Value: Enables field reconfiguration without firmware reflashing; 40-year retention ensures data integrity over equipment lifetime. | Use Scenario: Holding meter-specific calibration coefficients, tariff tables, and tamper-event logs in ANSI C12.20-compliant electricity meters. IC Role / Device Role / Timing Role: Secure, write-protected storage for metrology-critical values; WP pin prevents unauthorized modification. Use Value: Meets regulatory accuracy requirements; 1M write endurance supports daily log updates for >27 years. |
| Medical Device Setup Profiles | Automotive Body Control Module Settings |
Use Scenario: Saving operator-defined therapy profiles, sensor offsets, and safety limits in portable diagnostic equipment. IC Role / Device Role / Timing Role: I²C-accessible EEPROM interfaced to ARM Cortex-M microcontroller; powered from 3.3V rail. Use Value: Supports FDA-required audit trails; 2.5V–5.5V operation accommodates battery-backed or main-supply designs. | Use Scenario: Storing seat/mirror position presets, lighting configurations, and fault-code history in automotive BCMs. IC Role / Device Role / Timing Role: Robust nonvolatile memory on CAN-connected subsystem; withstands automotive temperature cycling. Use Value: –40°C to +85°C rating ensures reliability under hood conditions; TSSOP-8 footprint fits tight BCM layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C1024D-SSHD-T | Same 1 Mbit capacity and TSSOP-8 package, but rated for 1.7V–5.5V and offers enhanced ESD protection (4 kV HBM). | Preferred for ultra-low-voltage battery-powered devices or high-noise automotive interiors. | Select when extended low-voltage operation (<2.5V) or higher ESD robustness is required. |
| M95M01-RDW6TP | 1 Mbit SPI EEPROM in 8-lead TSSOP; 5 MHz SPI interface vs. I²C; no A1/A2 address pins. | Suitable where MCU has SPI but limited I²C resources; incompatible with shared-bus multi-device topology. | Choose only if system uses SPI exclusively and does not require cascaded device addressing. |
Compared with AT24C1024D-SSHD-T, the AT24C1024B-TH25-T offers tighter 2.5V–5.5V regulation and legacy compatibility; versus M95M01-RDW6TP, it provides I²C bus sharing and simpler two-wire wiring but lower maximum throughput.
Availability
AT24C1024B-TH25-T is available at Aetrix Electronics and suitable for industrial automation, smart metering, medical diagnostics, and automotive body electronics requiring stable component supply and long-term obsolescence management.
Supply support for AT24C1024B-TH25-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 global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with broad industrial and automotive qualification expertise.
The AT24C1024B-TH25-T belongs to Microchip's AT24Cxx serial EEPROM family, designed for reliable, low-power, I²C-based configuration and calibration storage in harsh operating environments.
FAQ
What is the supply voltage range supported by the AT24C1024B-TH25-T?
The AT24C1024B-TH25-T operates from 2.5V to 5.5V, making it compatible with both 3.3V and 5V logic systems. This dual-range capability eliminates the need for level shifters in mixed-voltage designs and ensures stable read/write performance across common industrial supply rails. The "25" in the part number explicitly denotes the 2.5V–5.5V version.
Does the AT24C1024B-TH25-T support multi-device I²C bus configurations?
Yes, the AT24C1024B-TH25-T supports up to four devices on a single I²C bus using its A1 and A2 address input pins. These pins can be hardwired to VCC or GND to set a unique 2-bit device address, enabling shared-bus communication without address conflicts. Floating A1/A2 defaults to logic low via internal biasing.
What package type and lead finish does the AT24C1024B-TH25-T use?
The AT24C1024B-TH25-T uses an 8-lead Thin Shrink Small Outline Package (TSSOP) with NiPdAu (nickel-palladium-gold) lead finish. This RoHS-compliant, matte-finish plating ensures excellent solderability, wire-bond compatibility, and resistance to corrosion and fretting wear-critical for high-reliability industrial assembly.
How does the write protect (WP) pin function on the AT24C1024B-TH25-T?
The WP pin on the AT24C1024B-TH25-T provides hardware-level write inhibition: when pulled high to VCC, all write operations-including byte, page, and erase-are blocked. When grounded or left floating (internally pulled down), writes are enabled. This allows safe default operation while enabling field-safe firmware updates via controlled WP activation.
What is the maximum I²C clock frequency supported by the AT24C1024B-TH25-T?
The AT24C1024B-TH25-T supports up to 1 MHz I²C clock frequency when operated at 2.5V or 5V. At 1.8V, the maximum is 400 kHz-but since the "25" suffix confirms the 2.5V–5.5V variant, the 1 MHz capability applies. This enables faster configuration loads compared to standard 400 kHz EEPROMs, reducing boot-time latency.
AT24C1024B-TH25-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 550 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
AT24C1024B-TH25-T FAQ
1.How can I place an order for AT24C1024B-TH25-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C1024B-TH25-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 AT24C1024B-TH25-T reliable?
The price and inventory of AT24C1024B-TH25-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C1024B-TH25-T is usually 5 days.
3.What payment methods are accepted for AT24C1024B-TH25-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C1024B-TH25-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C1024B-TH25-T?
AT24C1024B-TH25-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C1024B-TH25-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 AT24C1024B-TH25-T?
For technical support, including AT24C1024B-TH25-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C1024B-TH25-T requirements.
6.How does Aetrix verify that AT24C1024B-TH25-T is sourced from the original manufacturer or authorized distributors?
All AT24C1024B-TH25-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 AT24C1024B-TH25-T meets industry standards.
7.What is the process for return or replacement of AT24C1024B-TH25-T?
All AT24C1024B-TH25-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C1024B-TH25-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 AT24C1024B-TH25-T part is unused and in its original packaging.
Return procedure for AT24C1024B-TH25-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C1024B-TH25-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…
