23K256-I/P Microchip Integrated Circuit (Dual-In-Line Packages) In Stock
Microchip 23K256-I/P is a 256 Kbit (32 KB) SPI serial SRAM IC in an 8-pin PDIP package, supporting up to 20 MHz clock frequency with separate I/O and offering an easy-to-interface external memory expansion solution for microcontroller-based designs.
- Manufacturer
- Microchip
- Package
- Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 23K256-I/P Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.2630(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 256 Kbit (32 KB) SPI SRAM density provides substantial external data storage for microcontrollers with limited on-chip RAM
- Up to 20 MHz SPI clock frequency enables fast data throughput for real-time data buffering and logging applications
- 8-pin PDIP package simplifies prototyping and through-hole assembly with direct breadboard compatibility
- Byte, page, and sequential operation modes offer flexible memory access patterns to match diverse application data-access requirements
Applications
The 23K256-I/P is commonly used to expand the working RAM of SPI-capable microcontrollers such as PIC and AVR devices in data logging, audio buffering, and sensor data aggregation applications. Its compact 8-pin PDIP footprint makes it a straightforward drop-in addition to prototyping boards and low-cost embedded systems requiring up to 32 KB of additional volatile storage.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | PDIP-8 |
| Factory Lead Time | 8Weeks |
| YTEOL | 8 |
| Clock Frequency-Max (fCLK) | 20MHz |
| I/O Type | SEPARATE |
| JESD-30 Code | R-PDIP-T8 |
| JESD-609 Code | e3 |
| Memory Density | 262144bit |
| Memory IC Type | STANDARD SRAM |
| Memory Width | 8 |
| Number of Functions | 1 |
| Number of Ports | 1 |
| Number of Words | 32768words |
| Number of Words Code | 32000 |
| Operating Mode | SYNCHRONOUS |
| Organization | 32KX8 |
| Output Characteristics | 3-STATE |
| Output Enable | NO |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP8,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Parallel/Serial | SERIAL |
| Qualification Status | Not Qualified |
| Standby Current-Max | 0.000004A |
| 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 | NO |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| 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
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What SPI clock speed does the 23K256-I/P support, and how does that affect data throughput in a logging application?
The 23K256-I/P supports a maximum SPI clock frequency of 20 MHz, which allows a theoretical peak throughput of approximately 2.5 MB/s in byte-write mode. For data logging applications, this speed is more than sufficient to buffer high-rate sensor streams from ADCs operating at several hundred kHz sampling rates without introducing pipeline stalls in the host microcontroller.
How much storage capacity does the 23K256-I/P provide, and when should designers consider moving to a higher-density part?
The 23K256-I/P provides 262,144 bits (32 KB) of volatile SRAM storage accessible over SPI. Designers should consider a higher-density part such as the 23LC1024 (128 KB) when their application requires buffering more than a few seconds of sensor data at high sample rates, storing large lookup tables, or implementing circular buffers exceeding 32 KB in size.
Which microcontroller families work seamlessly with the 23K256-I/P via SPI, and what is the supply voltage compatibility?
The 23K256-I/P interfaces directly with Microchip PIC, AVR, and ARM Cortex-M microcontrollers that include a hardware SPI peripheral. It operates from a 2.7 V to 3.6 V supply, making it compatible with 3.3 V MCU systems without level shifting, though 5 V MCU designs require a voltage divider or logic-level translator on the MISO, MOSI, and SCK lines.
Does the 23K256-I/P support page-mode or burst access, and how does that benefit audio or video buffering designs?
Yes, the 23K256-I/P supports byte, page, and sequential read/write modes, allowing burst transfers of up to 32 KB in a single CS assertion without re-sending address bytes for each word. This sequential mode significantly reduces SPI overhead in audio buffering or frame-capture designs, enabling sustained data rates near the full 20 MHz clock bandwidth with minimal MCU interrupt load.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.2630 | $0.26 |
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