47L64-I/SN Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip 47L64-I/SN is a 64 Kbit (8 K × 8-bit) combination EEPROM and SRAM memory device with 550 ns maximum access time in an 8-pin SOIC package. Available with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- 47L64-I/SN Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Combines 64 Kbit EEPROM and SRAM in a single 8-pin SOIC, eliminating the need for two separate memory ICs in data-logging designs
- 550 ns maximum read access time enables fast random reads from SRAM without wait states on most 8-bit microcontrollers
- 8 K × 8-bit organization with 8-bit data bus width maps directly to byte-addressable MCU memory interfaces
Applications
The 47L64-I/SN is designed for microcontroller systems that need both non-volatile parameter storage and fast scratchpad RAM in a minimal footprint. It is commonly used in industrial sensors, medical devices, and consumer electronics where a single 8-pin SOIC replaces separate EEPROM and SRAM chips, saving board space and BOM cost.
Specifications
| Manufacturer Package Code | SOIC-8 |
| YTEOL | 0 |
| Access Time-Max | 550ns |
| JESD-30 Code | R-PDSO-G8 |
| Memory Density | 65536bit |
| Memory IC Type | MEMORY CIRCUIT |
| Memory Width | 8 |
| Mixed Memory Type | EEPROM+SRAM |
| Number of Functions | 1 |
| Number of Ports | 1 |
| Number of Words | 8192words |
| Number of Words Code | 8000 |
| Operating Mode | SYNCHRONOUS |
| Organization | 8KX8 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.23 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Supply Voltage-Max (Vsup) | 3.6V |
| Supply Voltage-Min (Vsup) | 2.7V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.32.00.51 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the total memory capacity of the 47L64-I/SN and how is it organized internally?
The 47L64-I/SN provides 64 Kbit of total memory, organized as 8 K × 8 bits. It combines EEPROM for non-volatile parameter storage with SRAM for volatile scratchpad data, both accessible through a single 8-bit port in one 8-pin SOIC package.
How fast can the MCU read data from the 47L64-I/SN and does this fit standard 8-bit MCU bus timing?
The 47L64-I/SN has a maximum read access time of 550 ns from the SRAM section. Most 8-bit microcontrollers running at 8 MHz to 20 MHz use bus cycle times of 100 ns to 500 ns, so designers may need one wait state at higher clock rates to meet the 550 ns timing requirement.
What advantage does combining EEPROM and SRAM in the 47L64-I/SN offer over using two discrete memory ICs?
Using the 47L64-I/SN reduces the memory subsystem from 2 ICs to 1, saving at least 8 PCB pins, one SOIC-8 footprint (approximately 5 mm × 4 mm), and associated bypass capacitors. This simplifies routing and reduces BOM cost in space-constrained battery-powered designs.
For a data-logger design that must survive power loss without data corruption, how does the EEPROM section of the 47L64-I/SN help?
The EEPROM section of the 47L64-I/SN retains data for 10+ years without power, making it suitable for storing configuration parameters, calibration constants, and event logs that must survive power cycles. Combined with the 64 Kbit capacity and 8-bit-wide access, it handles typical embedded logging tasks up to about 8,000 bytes of non-volatile records.
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