24C65/P Microchip Integrated Circuit (Dual-In-Line Packages) In Stock
Microchip 24C65/P is a 64 Kbit I2C serial EEPROM with 400 kHz fast-mode bus, 4.5 V to 6 V supply range, and 1 million write/erase cycle endurance in an 8-pin PDIP through-hole package. From $1.00 in stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 24C65/P Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.7700(MOQ 1)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 64 Kbit (8 KB) I2C EEPROM with 1 million write/erase cycle endurance provides long-lived non-volatile data storage for calibration, configuration, and event logging
- 400 kHz Fast Mode I2C interface with hardware write-protect pin enables secure, high-speed data access and protection in multi-master bus systems
- PDIP-8 through-hole package with 4.5 V to 6 V supply range fits legacy 5 V industrial and embedded systems requiring socketed, field-replaceable memory
Applications
24C65/P is used to store firmware configuration tables, calibration data, and runtime logs in industrial controllers and embedded systems requiring 8 KB of reliable non-volatile memory. Its I2C interface allows daisy-chaining multiple EEPROM devices on a shared 2-wire bus, making it suitable for multi-board instrument systems and PLC expansion modules. The PDIP-8 package and 4.5 V to 6 V supply range make it a natural fit for legacy 5 V designs, including retrofit upgrades and field-service scenarios where socketed ICs simplify replacement.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | PDIP-8 |
| Factory Lead Time | 8Weeks |
| YTEOL | 8 |
| Clock Frequency-Max (fCLK) | 0.4MHz |
| Data Retention Time-Min | 200 |
| Endurance | 1000000 Write/Erase Cycles |
| I2C Control Byte | 1010DDDR |
| JESD-30 Code | R-PDIP-T8 |
| JESD-609 Code | e3 |
| Memory Density | 65536bit |
| Memory IC Type | EEPROM |
| Memory Width | 8 |
| Number of Functions | 1 |
| Number of Ports | 1 |
| Number of Words | 8192words |
| Number of Words Code | 8000 |
| Operating Mode | SYNCHRONOUS |
| Organization | 8KX8 |
| Output Characteristics | OPEN-DRAIN |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP8,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Parallel/Serial | SERIAL |
| Programming Voltage | 5V |
| Qualification Status | Not Qualified |
| Screening Level | TS 16949 |
| Serial Bus Type | I2C |
| Standby Current-Max | 0.000005A |
| Supply Current-Max | 0.003mA |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Write Cycle Time-Max (tWC) | 5ms |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.32.00.51 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for 24C65/P:
Frequently Asked Questions
How does the 64 Kbit capacity of 24C65/P compare to the 2 Kbit 24C02, and what extra data can the larger device store?
At 64 Kbit (8 KB), the 24C65/P holds 32× more data than the 2 Kbit 24C02's 256 bytes. The extra space can accommodate 500+ calibration records each containing 16-byte parameter sets, a 4 KB firmware configuration table, or up to 8,000 one-byte event log entries — all on a single I2C device requiring only a 2-wire bus connection and no additional address pins beyond the 3 hardware address bits.
At 400 kHz I2C Fast Mode, how quickly can 24C65/P transfer a full 8 KB data block?
Using 400 kHz I2C Fast Mode with a page-write buffer approach, the 24C65/P can read its full 8 KB content in approximately 165 ms (accounting for I2C protocol overhead at 9 bits per byte). For sequential page reads, practical throughput exceeds 35 KB/s, enabling a microcontroller to restore a complete configuration snapshot from EEPROM in well under 250 ms at system startup.
In a legacy 5 V industrial PLC design, what makes 24C65/P preferable to a modern 3.3 V EEPROM variant?
The 24C65/P operates from 4.5 V to 6 V, directly compatible with 5 V logic bus levels found in legacy PLCs and 8051-based controllers without level-shifting circuitry. Modern 3.3 V variants like 24LC65 require a level translator or a mixed-voltage I2C bus pull-up scheme to interface with 5 V logic, adding BOM cost and routing complexity. The PDIP-8 through-hole package also simplifies field replacement in socketed designs with 1 million cycle write endurance supporting decades of operational life.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $2.6000 | $2.60 |
| 4+ | $2.3600 | $9.44 |
| 12+ | $1.7700 | $21.24 |
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