93LC46/P Microchip Integrated Circuit (Dual-In-Line Packages) In Stock
The 93LC46/P is a 1 Kbit (128 × 8-bit) 2.5V Microwire serial EEPROM with a maximum clock frequency of 2 MHz and 1,000,000 write/erase endurance cycles, packaged in an 8-pin DIP through-hole package. It provides 200-year minimum data retention for reliable non-volatile storage in embedded systems. Suitable for appliance calibration data, configuration settings, and trim value storage in cost-sensitive designs.
- Manufacturer
- Microchip
- Package
- Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- NOT RECOMMENDED
- Datasheet
- 93LC46/P Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4620(MOQ 1)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 1 Kbit EEPROM capacity organized as 64 × 16-bit or 128 × 8-bit words selectable by ORG pin
- Microwire (SPI-compatible) serial interface at up to 2 MHz for simple 3-wire host connectivity
- 1,000,000 write/erase cycle endurance for long service life in frequently updated applications
- Minimum 200-year data retention ensuring reliable non-volatile storage over product lifetime
- Low 2.5V minimum supply operation supporting modern low-voltage microcontroller systems
- 8-pin DIP package for straightforward prototyping and legacy through-hole PCB designs
Applications
The 93LC46/P is used to store device configuration parameters, calibration coefficients, and serial number data in appliances, consumer electronics, and industrial control boards that require a small, cost-effective non-volatile memory. Its simple 3-wire Microwire interface is easily driven by virtually any microcontroller's SPI peripheral or bit-banged GPIO, making it a popular choice for storing trim values in sensor modules and metering equipment. The 8-pin DIP package also makes it convenient for prototype development and repair scenarios where through-hole soldering is preferred.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | PDIP-8 |
| Factory Lead Time | 8Weeks |
| Date Of Intro | 1991-01-01 |
| YTEOL | 3 |
| Alternate Memory Width | 8 |
| Clock Frequency-Max (fCLK) | 2MHz |
| Data Retention Time-Min | 200 |
| Endurance | 1000000 Write/Erase Cycles |
| JESD-30 Code | R-PDIP-T8 |
| JESD-609 Code | e3 |
| Memory Density | 1024bit |
| Memory IC Type | EEPROM |
| Memory Width | 16 |
| Number of Functions | 1 |
| Number of Ports | 1 |
| Number of Words | 64words |
| Number of Words Code | 64 |
| Operating Mode | SYNCHRONOUS |
| Organization | 64X16 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP8,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Parallel/Serial | SERIAL |
| Programming Voltage | 3V |
| Qualification Status | Not Qualified |
| Screening Level | TS 16949 |
| Serial Bus Type | MICROWIRE |
| Standby Current-Max | 0.0001A |
| Supply Current-Max | 0.003mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2.5V |
| Supply Voltage-Nom (Vsup) | 3V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | MATTE TIN |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Write Cycle Time-Max (tWC) | 10ms |
| Write Protection | SOFTWARE |
| 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 93LC46/P:
Frequently Asked Questions
How many write cycles can the 93LC46/P endure before wear affects data reliability?
The 93LC46/P is rated for 1,000,000 write/erase cycles per memory address, which provides substantial endurance for applications that update calibration coefficients or configuration settings infrequently; even at one write per day, this endurance lasts over 2,700 years before approaching the wear limit.
What clock frequency does the 93LC46/P support, and how does the Microwire interface connect to a PIC microcontroller?
The 93LC46/P supports a maximum clock frequency of 2 MHz on its Microwire serial interface, which connects to a PIC or AVR MCU using 3 signals: chip select (CS), data clock (CLK), and data in/out (DI/DO); many PIC18 and AVR MCUs natively support the SPI protocol that is fully compatible with Microwire, requiring minimal firmware to read and write 8-bit or 16-bit words.
What minimum supply voltage does the 93LC46/P operate from, and does it suit 3.3V microcontroller systems?
The 93LC46/P operates from a minimum supply voltage of 2.5V, making it directly compatible with 3.3V logic systems used in modern ARM Cortex, ESP32, and nRF52-based designs without any level translation; at 3.3V supply, it maintains full 2 MHz clock operation and complete 1 Kbit read/write functionality.
For an appliance storing factory calibration data that must survive 200 years, is the 93LC46/P a suitable non-volatile memory choice?
Yes, the 93LC46/P specifies a minimum data retention time of 200 years at ambient temperature, ensuring that calibration coefficients, serial numbers, and configuration bytes written at the factory remain intact throughout the entire expected service life of most appliances, which is typically 10–20 years, with a very large safety margin of over 10x.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
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