My Inquiry
My Account
Microchip Technology 23LC512-I/SN
- Part No.:
- 23LC512-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
23LC512-I/SN.pdf
- Description:
- IC SRAM 512KBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,083
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
23LC512-I/SN from Microchip Technology is a 512-Kbit serial SRAM with SPI/SDI/SQI interface, organized as 64K × 8 bits with 32-byte page size. It operates from 2.5V to 5.5V, supports 20 MHz clock (16 MHz at extended temp), delivers 3 mA read current at 5.5V/20 MHz, and features zero write time for real-time data buffering in microcontroller-based systems.
For engineers reviewing the 23LC512-I/SN datasheet, 23LC512-I/SN pinout, 23LC512-I/SN application, or 23LC512-I/SN equivalent, this device is selected for high-speed, low-latency serial memory expansion where unlimited endurance, fast byte/page/sequential access modes, and dual/quad I/O capability are required in space-constrained industrial and embedded designs.
Technical Context
The 23LC512-I/SN implements a true SRAM core accessed via a configurable serial bus supporting three protocols: standard SPI (SI/SO), Serial Dual Interface (SDI using SIO0/SIO1), and Serial Quad Interface (SQI using SIO0–SIO3). Its MODE register (bits 7–6) selects Byte, Page, or Sequential operation - enabling flexible burst-length control without external address latching.
It integrates dedicated HOLD functionality (active-low, synchronous with SCK) for pausing ongoing transfers mid-sequence, and supports dynamic mode switching via EDIO/EQIO/RSTIO commands. The device powers up in Standby mode (CS = high), with SO tri-stated, and requires no initialization sequence before first access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8-bit organization), enabling compact firmware/data cache in resource-limited MCUs. |
| Interface Modes | SPI (SI/SO), SDI (SIO0/SIO1), SQI (SIO0–SIO3); SQI doubles bandwidth vs SPI, but disables HOLD. |
| Max Clock Frequency | 20 MHz at Industrial temp (−40°C to +85°C); enables ≤50 ns per bit transfer in SPI mode. |
| Read Current | 3 mA at VCC = 5.5V, fCLK = 20 MHz - defines active power budget for continuous streaming reads. |
| Standby Current | 4 µA at +85°C - ensures ultra-low quiescent draw during MCU sleep cycles. |
| Data Retention Voltage | 1.0 V minimum VCC - guarantees RAM contents survive brown-out down to 1.0 V without backup capacitor. |
| Page Size | 32 bytes - aligns with common MCU DMA buffer sizes and minimizes write overhead in burst writes. |
Pinout & Package
23LC512-I/SN is packaged in an 8-lead narrow SOIC (SN) with 1.27 mm pitch, 3.90 mm body width, and RoHS-compliant matte tin plating. Pin 1 is marked by a notch or dot; package meets JEDEC MS-012AA standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low enable; forces Standby mode when high, tri-states SO to allow multi-device SPI bus sharing. |
| SO/SIO1 | Serial Output / SDI/SQI Data Line | Primary data-out in SPI; shares pin with SIO1 for dual/quad modes - requires mode-aware PCB routing. |
| SIO2 | SQI Data Line | Dedicated quad-mode input/output; unused and must be tied low or left floating only in SPI/SDI mode. |
| VSS | Ground Reference | System ground return; decoupling capacitor (0.1 µF) required within 5 mm of VCC/VSS pins. |
| SI/SIO0 | Serial Input / SDI/SQI Data Line | Primary data-in in SPI; shares pin with SIO0 - same physical trace serves all three interface modes. |
| SCK | Serial Clock Input | Edge-triggered master clock; rising edge latches SI, falling edge updates SO - dictates timing margins. |
| HOLD/SIO3 | Transfer Hold / SQI Data Line | Pauses ongoing SPI transfer without resetting address pointer; disabled in SQI mode (pin repurposed). |
| VCC | Power Supply | 2.5V–5.5V operation; supports direct connection to 3.3V or 5V MCU rails without level-shifting. |
Key Features
| Feature | Design Value |
|---|---|
| Unlimited Read/Write Cycles | Enables use as volatile working memory in logging, buffering, or configuration storage without wear-out concerns. |
| Zero Write Time | Eliminates wait states after write commands - critical for deterministic real-time response in control loops. |
| Three Access Modes (Byte/Page/Sequential) | Allows optimization: single-register update (Byte), sensor array burst (Page), or full-memory dump (Sequential). |
| SDI/SQI Protocol Support | Doubles (SDI) or quadruples (SQI) effective throughput vs SPI - reduces host CPU overhead in high-bandwidth apps. |
| HOLD Function with SCK Synchronization | Permits safe interruption of multi-byte transfers during interrupt servicing without losing state or reinitializing. |
Applications
| Industrial PLC Data Buffering | Medical Sensor Fusion Node |
|---|---|
Use Scenario: Storing real-time analog channel samples from multiple ADCs before batch transmission to host MCU. IC Role / Device Role / Timing Role: High-speed serial scratchpad memory interfacing directly with PIC® MCU SPI port. Use Value: 20 MHz clock and 32-byte page writes reduce sample-to-transmit latency by >40% vs parallel SRAM with address demux. |
Use Scenario: Aggregating synchronized ECG, SpO₂, and temperature readings for local preprocessing prior to BLE upload. IC Role / Device Role / Timing Role: Low-power volatile buffer supporting burst reads/writes during sensor acquisition windows. Use Value: 4 µA standby current extends battery life in portable monitors; zero write time prevents sample loss during interrupts. |
| Automotive Body Control Module | IoT Edge Gateway Cache |
Use Scenario: Temporarily holding door lock status, window position, and lighting configuration during MCU reset or firmware update. IC Role / Device Role / Timing Role: Non-volatile-equivalent SRAM with 1.0 V data retention voltage. Use Value: Maintains critical state across 12 V supply dips down to 1.0 V - avoids re-synchronization delays after brown-out recovery. |
Use Scenario: Caching MQTT publish payloads and OTA firmware fragments in constrained-edge gateways with intermittent connectivity. IC Role / Device Role / Timing Role: SPI-accessible memory co-located with ESP32 or nRF52 for low-pin-count design. Use Value: SQI mode achieves 80 MB/s effective bandwidth - cuts payload assembly time by 75% vs software-bitbanged SPI. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY14V104L-ZSP25XI | 4-Mbit density, 25 MHz max clock, 3.3 V only, integrated NVSRAM with lithium battery backup. | Used where non-volatility is mandatory without external backup; higher cost and larger footprint. | Select when data retention during total power loss is required - 23LC512-I/SN lacks on-chip non-volatility. |
| IS62WV51216BLL-55TLI | Parallel 512K × 16 interface, 55 ns access, 3.3 V, no serial protocol support. | Requires 16+ data lines, address bus, and control signals - incompatible with SPI-only MCU designs. | Choose only if existing PCB has parallel memory bus; 23LC512-I/SN saves ≥12 pins and simplifies layout. |
Compared with CY14V104L-ZSP25XI and IS62WV51216BLL-55TLI, the 23LC512-I/SN offers optimal balance of SPI compatibility, low pin count, zero-write-time performance, and industrial temperature support - making it ideal for new designs prioritizing integration simplicity and real-time responsiveness over non-volatility or raw speed.
Availability
23LC512-I/SN is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and automotive body electronics requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for 23LC512-I/SN includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a leading provider of microcontrollers, analog, FPGA, and memory solutions, serving industrial, automotive, and consumer markets with vertically integrated silicon and development tools.
The 23LC512-I/SN belongs to Microchip's serial SRAM product line, designed specifically to replace parallel SRAMs in space- and pin-constrained embedded systems while maintaining SRAM-level performance and reliability.
FAQ
What is the operating voltage range for the 23LC512-I/SN?
The 23LC512-I/SN operates from 2.5 V to 5.5 V, supporting direct interface with both 3.3 V and 5 V microcontroller I/O domains without level shifters. This wide VCC range allows flexible system power architecture design and ensures compatibility across legacy and modern MCU platforms.
Does the 23LC512-I/SN support quad-SPI (QSPI) mode?
Yes, the 23LC512-I/SN supports Serial Quad Interface (SQI) mode using SIO0–SIO3 pins, delivering up to 4× the data rate of standard SPI. However, SQI mode disables the HOLD function, and pin 3 (SIO2) and pin 7 (HOLD/SIO3) must be actively driven per SQI protocol timing - not left floating.
How many write cycles does the 23LC512-I/SN guarantee?
The 23LC512-I/SN guarantees unlimited write cycles - a fundamental characteristic of SRAM technology. Unlike flash or EEPROM, it imposes no endurance limits on repeated writes, making it suitable for applications involving frequent data updates such as real-time buffers or configuration registers.
What is the maximum clock frequency supported by the 23LC512-I/SN at industrial temperature?
At Industrial temperature (−40°C to +85°C), the 23LC512-I/SN supports a maximum clock frequency of 20 MHz in SPI, SDI, and SQI modes. At Extended temperature (−40°C to +125°C), the maximum clock is reduced to 16 MHz to ensure timing margin compliance across process and voltage corners.
Can the 23LC512-I/SN retain data during power loss?
The 23LC512-I/SN retains data down to VCC = 1.0 V (data retention voltage), meaning it preserves memory contents during brown-out conditions until supply drops below that threshold. However, it is volatile memory and loses data completely when VCC falls below 1.0 V or is removed - no internal non-volatility or battery backup is provided.
23LC512-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM
- Memory Size:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 20 MHz
- Write Cycle Time - Word, Page:
- -
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
23LC512-I/SN FAQ
1.How can I place an order for 23LC512-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 23LC512-I/SN on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 23LC512-I/SN reliable?
The price and inventory of 23LC512-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 23LC512-I/SN is usually 5 days.
3.What payment methods are accepted for 23LC512-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23LC512-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 23LC512-I/SN?
23LC512-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 23LC512-I/SN order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 23LC512-I/SN?
For technical support, including 23LC512-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23LC512-I/SN requirements.
6.How does Aetrix verify that 23LC512-I/SN is sourced from the original manufacturer or authorized distributors?
All 23LC512-I/SN products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 23LC512-I/SN meets industry standards.
7.What is the process for return or replacement of 23LC512-I/SN?
All 23LC512-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 23LC512-I/SN, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 23LC512-I/SN part is unused and in its original packaging.
Return procedure for 23LC512-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
23LC512-I/SN Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
