My Inquiry
My Account
Microchip Technology AT24C1024BY7-YH25-T
- Part No.:
- AT24C1024BY7-YH25-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UDFN Exposed Pad
- Datasheet:
-
AT24C1024BY7-YH25-T.pdf
- Description:
- IC EEPROM 1MBIT I2C 1MHZ 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,696
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT24C1024BY7-YH25-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 5V/2.5V, features hardware write protection via WP pin, and uses an 8-lead Ultra Thin Small Array Package (SAP) with NiPdAu lead finish.
For engineers reviewing the AT24C1024BY7-YH25-T datasheet, AT24C1024BY7-YH25-T pinout, AT24C1024BY7-YH25-T application, or AT24C1024BY7-YH25-T equivalent, key selection criteria include its 2.5V–5.5V supply range, 1 MHz I²C interface speed, 256-byte page write capability, 1,000,000 write endurance per page, and 40-year data retention - critical for firmware storage, calibration data logging, and configuration memory in space-constrained embedded systems.
Technical Context
The AT24C1024BY7-YH25-T implements a standard two-wire (I²C-compatible) serial interface with open-drain SDA and Schmitt-triggered SCL inputs for noise immunity. It uses A1/A2 address pins to support up to four devices on a shared bus and includes a dedicated WP pin for hardware-level write protection.
Internally organized as 512 pages of 256 bytes each, it supports byte-write, page-write (with automatic address increment within page), current-address read, random-address read, and sequential read modes. Its self-timed write cycle completes in 5 ms typical, and it enters low-power standby mode after STOP condition or power-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1,048,576 bits (131,072 × 8), enabling storage of large configuration tables or firmware patches in compact systems |
| Supply Voltage Range | 2.5V to 5.5V - compatible with legacy 3.3V and 5V microcontroller I/O domains without level shifting |
| I²C Clock Frequency | Up to 1 MHz at 2.5V/5V - enables faster parameter updates than standard 400 kHz EEPROMs |
| Page Write Capacity | 256-byte page writes - reduces transaction overhead when updating multi-byte records like sensor calibration sets |
| Write Endurance | 1,000,000 write cycles per page - supports frequent field calibration or event logging in industrial controllers |
| Data Retention | 40 years at +85°C - ensures long-term reliability for unattended equipment deployed in remote infrastructure |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient environments including factory automation and outdoor metering |
Pinout & Package
AT24C1024BY7-YH25-T is housed in an 8-lead Ultra Thin Small Array Package (SAP), 6.00 mm × 4.90 mm body, non-leaded, dual footprint, with NiPdAu lead finish. Pin 1 is marked by a dot in the top-left corner (viewed from top).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Unused terminal; must be left floating or tied to GND per layout guidelines - no internal connection |
| 2 (A1) | Device Address Input | Hardwired logic input enabling up to four AT24C1024B devices on one I²C bus; internally pulled down if floating |
| 3 (A2) | Device Address Input | Second device address bit; used with A1 to configure unique 7-bit I²C slave address (bits A2,A1,P0) |
| 4 (GND) | Ground Reference | Primary return path for VCC and I/O signals; requires low-impedance PCB plane for noise immunity |
| 5 (VCC) | Power Supply | 2.5V–5.5V supply input; decoupling capacitor (0.1 µF) required within 10 mm of pin for stable operation |
| 6 (WP) | Write Protect Control | Active-high hardware lock: tied to VCC disables all writes; tied to GND enables full read/write access |
| 7 (SCL) | Serial Clock Input | Input-only I²C clock line with Schmitt trigger; requires external pull-up resistor (typically 2.2–10 kΩ) |
| 8 (SDA) | Serial Data I/O | Open-drain bidirectional data line; shares pull-up with other I²C devices on same bus |
Key Features
| Feature | Design Value |
|---|---|
| Two-wire Serial Interface | Fully compatible with I²C protocol - simplifies integration with ARM Cortex-M, PIC, and ESP32 host MCUs using standard drivers |
| Schmitt Trigger Inputs | Enhanced noise immunity on SCL/SDA lines - eliminates false clock/data transitions in electrically noisy industrial enclosures |
| 256-byte Page Write Mode | Reduces I²C transaction count by >99% vs. byte-wise writes for bulk updates - cuts firmware update time from seconds to milliseconds |
| Hardware Write Protection | WP pin provides tamper-resistant configuration locking - prevents accidental overwrites during system boot or debug sessions |
| 17-bit Addressing | Supports full 131,072-word address space with P0 bit in device address - enables direct access to any location without bank switching |
Applications
| Industrial PLC Configuration Storage | Smart Meter Firmware Backup |
|---|---|
Use Scenario: Storing user-defined I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in manufacturing lines. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via I²C during startup and runtime reconfiguration. Use Value: Enables field-upgradable control logic without requiring flash reprogramming; 40-year retention ensures settings survive decades of operation. | Use Scenario: Holding encrypted firmware images and cryptographic keys in utility-grade electricity meters subject to regulatory certification. IC Role / Device Role / Timing Role: Secure boot-time firmware backup storage with hardware write protection preventing unauthorized modification. Use Value: WP pin allows permanent lockdown after factory programming - meets IEC 62056 and ANSI C12.22 security requirements. |
| Medical Device Calibration Data | Automotive Body Control Module Settings |
Use Scenario: Recording sensor offset/gain coefficients and patient-specific therapy profiles in portable diagnostic equipment. IC Role / Device Role / Timing Role: High-reliability parameter storage accessed during device power-on self-test (POST). Use Value: 1,000,000 write cycles support daily recalibration across 10+ years of clinical use without wear-out failure. | Use Scenario: Storing seat position memory, mirror presets, and lighting configuration in automotive BCMs operating across –40°C to +85°C. IC Role / Device Role / Timing Role: Automotive-grade EEPROM interfaced to CAN-connected microcontrollers via I²C bridge ICs. Use Value: Industrial temperature rating and 2.5V–5.5V operation ensure compatibility with 12V vehicle electrical systems and modern low-voltage MCUs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C1024BN-SH25-T | Same 1 Mbit capacity and 2.5V–5.5V range, but in 8-lead JEDEC SOIC (8S1) package - 5.0 mm × 6.2 mm vs. SAP's 6.0 mm × 4.9 mm | SOIC offers easier hand-soldering and test probe access; SAP targets ultra-thin consumer/portable designs | Select AT24C1024BN-SH25-T for prototyping or cost-sensitive industrial boards where board height is not constrained |
| M95M01-RDW6TP | 1 Mbit SPI EEPROM (not I²C); 2.5V–5.5V supply; 10 MHz SPI clock; no WP pin - uses software write enable (WREN) instead | SPI interface requires 4 signal lines vs. I²C's 2; incompatible protocol stack - mandates MCU driver rewrite | Select M95M01-RDW6TP only when SPI bandwidth >1 MHz is needed and I²C bus loading must be avoided |
Compared with AT24C1024BN-SH25-T, the AT24C1024BY7-YH25-T saves 0.5 mm in height and offers identical electrical performance in a space-optimized SAP package; versus M95M01-RDW6TP, it preserves I²C compatibility and hardware write protection - critical for drop-in replacement in existing two-wire designs.
Availability
AT24C1024BY7-YH25-T is available at Aetrix Electronics and suitable for industrial PLC configuration storage, smart meter firmware backup, medical device calibration data logging, and automotive body control module settings requiring stable component supply across extended product lifecycles.
Supply support for AT24C1024BY7-YH25-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 memory solutions, with a focus on embedded control and connectivity.
The AT24C1024B family was designed for high-reliability, low-voltage serial data storage in industrial, medical, and automotive systems where long-term data integrity and I²C bus compatibility are essential.
FAQ
What is the maximum I²C clock frequency supported by the AT24C1024BY7-YH25-T?
The AT24C1024BY7-YH25-T supports up to 1 MHz I²C clock frequency when operated at 2.5V or 5V supply. At 1.8V, the maximum is 400 kHz. This higher speed at 2.5V+ enables faster firmware updates and parameter writes compared to legacy 400 kHz EEPROMs - a key advantage for time-critical embedded applications.
Does the AT24C1024BY7-YH25-T require external pull-up resistors on SDA and SCL lines?
Yes, the AT24C1024BY7-YH25-T requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is input-only with Schmitt trigger. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and desired rise time; Microchip recommends 4.7 kΩ for standard 100 pF bus loads.
How does the write protect (WP) pin function on the AT24C1024BY7-YH25-T?
When the WP pin of the AT24C1024BY7-YH25-T is driven high to VCC, all write operations (byte, page, and erase) are inhibited - protecting stored data from accidental overwrite. When WP is grounded, full read/write access is enabled. If left floating, the pin is internally pulled down, defaulting to write-enabled mode, though Microchip recommends explicit grounding for reliability.
What package type is used for the AT24C1024BY7-YH25-T, and what are its key mechanical dimensions?
The AT24C1024BY7-YH25-T uses an 8-lead Ultra Thin Small Array Package (SAP), designated 8Y7, measuring 6.00 mm × 4.90 mm with a maximum height of 0.60 mm. Its dual footprint supports compatibility with both SOIC and TSSOP layouts, and the NiPdAu lead finish ensures robust solderability and wire-bonding capability.
Can multiple AT24C1024BY7-YH25-T devices share the same I²C bus?
Yes, up to four AT24C1024BY7-YH25-T devices can share a single I²C bus using hardwired A1 and A2 address pins. These pins configure the two least-significant bits of the 7-bit slave address, allowing unique addressing (e.g., 0x50–0x53). The P0 bit (page select) occupies the third LSB, enabling full 1 Mbit addressing without bus contention.
AT24C1024BY7-YH25-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-UDFN Exposed Pad
- 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-UDFN (6x4.9)
AT24C1024BY7-YH25-T FAQ
1.How can I place an order for AT24C1024BY7-YH25-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C1024BY7-YH25-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 AT24C1024BY7-YH25-T reliable?
The price and inventory of AT24C1024BY7-YH25-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C1024BY7-YH25-T is usually 5 days.
3.What payment methods are accepted for AT24C1024BY7-YH25-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C1024BY7-YH25-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C1024BY7-YH25-T?
AT24C1024BY7-YH25-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C1024BY7-YH25-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 AT24C1024BY7-YH25-T?
For technical support, including AT24C1024BY7-YH25-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C1024BY7-YH25-T requirements.
6.How does Aetrix verify that AT24C1024BY7-YH25-T is sourced from the original manufacturer or authorized distributors?
All AT24C1024BY7-YH25-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 AT24C1024BY7-YH25-T meets industry standards.
7.What is the process for return or replacement of AT24C1024BY7-YH25-T?
All AT24C1024BY7-YH25-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C1024BY7-YH25-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 AT24C1024BY7-YH25-T part is unused and in its original packaging.
Return procedure for AT24C1024BY7-YH25-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C1024BY7-YH25-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…
