23K640-I/ST Microchip Integrated Circuit (Small Outline Packages) In Stock
23K640-I/ST is a Microchip 64 Kbit SPI serial SRAM with 8-bit width, up to 20 MHz clock, and 2.7 V to 3.6 V supply. Available in TSSOP-8 for compact embedded designs. From $0.85 in stock worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 23K640-I/ST Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.6219(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of 23K640-I/ST?
- 64 Kbit (8 KB) SRAM density with 8-bit data bus
- SPI interface running up to 20 MHz clock frequency
- Supply voltage 2.7 V to 3.6 V compatible with 3.3 V systems
- Sequential, page, and byte operation modes for flexible access
- TSSOP-8 package with 0.65 mm pitch for compact PCBs
- Industrial temperature range -40°C to 85°C
What is 23K640-I/ST used for?
The 23K640-I/ST provides low-cost SPI-accessible external SRAM to microcontrollers that lack sufficient on-chip memory for data logging or buffer storage. Its 20 MHz SPI clock and byte-addressable interface make it straightforward to interface with PIC, AVR, or ARM Cortex-M devices. Typical uses include network packet buffering, sensor data queuing, and scratch-pad storage in space-constrained embedded nodes.
What are the specifications of 23K640-I/ST?
| Pbfree Code | Yes |
| Manufacturer Package Code | TSSOP-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 | TSSOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| 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 | 0.65mm |
| 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 | Malaysia, Philippines, Thailand |
Where can I find the 23K640-I/ST datasheet?
23K640-I/ST Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for 23K640-I/ST?
Compatible alternatives and drop-in replacements for 23K640-I/ST:
suggested
suggested
Frequently Asked Questions
What SPI clock speed and supply voltage does the 23K640-I/ST support?
The 23K640-I/ST accepts SPI clocks up to 20 MHz and operates from a 2.7 V to 3.6 V supply, making it directly compatible with 3.3 V microcontroller SPI buses without level-shifting in most designs.
How much additional RAM does the 23K640-I/ST add to an MCU-based design?
The device provides 64 Kbit (8 KB) of byte-addressable SRAM accessible via SPI, which is enough to double the available working memory of many small PIC or AVR microcontrollers that offer only 4 KB to 8 KB on-chip.
For a battery-powered sensor node, how does the TSSOP-8 package size and voltage range of the 23K640-I/ST help reduce BOM cost?
The TSSOP-8 footprint occupies roughly 30 mm² of board area, and the 2.7 V minimum supply allows direct use with a depleting lithium coin cell down to approximately 2.8 V, avoiding a dedicated boost regulator and keeping total BOM additions to one passive decoupling capacitor.
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More from Microchip
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.8600 | $0.86 |
| 4+ | $0.6404 | $2.56 |
| 8+ | $0.6311 | $5.05 |
| 16+ | $0.6219 | $9.95 |
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