23K640-I/SN Microchip Integrated Circuit (Small Outline Packages) In Stock
23K640-I/SN is a 64 Kbit (8K x 8) SPI serial SRAM from Microchip Technology in an 8-pin SOIC package. It supports SPI clock frequencies up to 20 MHz with separate I/O lines and a Pb-free, RoHS-compliant construction. Available in stock worldwide with competitive pricing and fast delivery.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 23K640-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
- 64 Kbit (65,536 bit) serial SRAM with 8-bit wide organization accessed via SPI at up to 20 MHz, enabling fast data buffering without parallel bus overhead
- Byte, page, and sequential read/write modes provide flexible memory access patterns for diverse embedded application data-flow requirements
- Compact 8-pin SOIC package with separate I/O pins allows easy integration with microcontrollers on SPI buses alongside other peripherals
- Pb-free, RoHS-compliant construction with 8-year YTEOL ensures long-term supply availability for consumer and industrial product designs
Applications
The 23K640-I/SN is used as an external data buffer and scratch-pad RAM in microcontroller-based systems where internal SRAM is insufficient for real-time data logging, network packet buffering, or audio/image frame storage. It is commonly paired with 8-bit and 32-bit MCUs in IoT nodes, embedded data loggers, and communications equipment that use SPI buses for peripheral expansion. Its fast 20 MHz SPI clock supports high-throughput data transfer requirements in latency-sensitive embedded applications.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOIC-8 |
| Factory Lead Time | 6Weeks |
| YTEOL | 8 |
| Clock Frequency-Max (fCLK) | 20MHz |
| I/O Type | SEPARATE |
| JESD-30 Code | R-PDSO-G8 |
| Memory Density | 65536bit |
| Memory IC Type | STANDARD SRAM |
| 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 | 3-STATE |
| Output Enable | NO |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Parallel/Serial | SERIAL |
| Qualification Status | Not Qualified |
| Standby Current-Max | 0.000001A |
| Standby Voltage-Min | 2.7V |
| Supply Current-Max | 0.01mA |
| Supply Voltage-Max (Vsup) | 3.6V |
| Supply Voltage-Min (Vsup) | 2.7V |
| Supply Voltage-Nom (Vsup) | 3V |
| Surface Mount | YES |
| Technology | CMOS |
| 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 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for 23K640-I/SN:
Frequently Asked Questions
What is the memory size and organization of the 23K640-I/SN?
The 23K640-I/SN provides 64 Kbits (8,192 bytes) of static RAM organized as 8K x 8 bits. It uses a serial SPI interface rather than a parallel bus, reducing pin count while enabling fast random-access reads and writes at clock speeds up to 20 MHz.
What SPI clock frequency does the 23K640-I/SN support?
The 23K640-I/SN supports SPI clock frequencies up to 20 MHz, enabling fast data transfers between the SRAM and the host microcontroller. This bandwidth is sufficient for most embedded buffering, logging, and intermediate data storage use cases in real-time systems.
What access modes does the 23K640-I/SN support?
The 23K640-I/SN supports byte mode (single-byte read/write), page mode (32-byte page access), and sequential mode (continuous read/write across the full address range). These modes give the designer flexibility to optimize access patterns for their specific application's data flow and throughput requirements.
What package does the 23K640-I/SN come in and is it RoHS compliant?
The 23K640-I/SN is packaged in an 8-pin SOIC (Small Outline IC) surface-mount package with 1.27 mm pitch, identified by JESD-30 code R-PDSO-G8. It is fully Pb-free and RoHS compliant (Pbfree Code: Yes), meeting international hazardous substance regulations for electronic components.
How does the 23K640-I/SN differ from EEPROM in embedded applications?
Unlike EEPROM, the 23K640-I/SN is volatile SRAM — data is lost when power is removed, but it offers unlimited read/write cycles with no write endurance limitations. This makes it ideal for temporary data buffering, working variables, and real-time data logging where fast write speed and unlimited writes are more important than non-volatile retention.
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