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Microchip Technology 23LCV512-E/P
- Part No.:
- 23LCV512-E/P
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
23LCV512-E/P.pdf
- Description:
- IC SRAM 512KBIT SPI/DUAL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,590
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Product details
Overview
23LCV512-E/P from Microchip Technology is a 512-Kbit SPI Serial SRAM with battery backup support, operating across 2.5–5.5 V and delivering 20 MHz clock rate in SPI/SDI mode. It features unlimited read/write cycles, zero write time, 64K × 8-bit organization (32-byte pages), and industrial temperature range (−40°C to +85°C). Used in embedded systems requiring nonvolatile data retention during main power loss, such as smart meters and industrial controllers.
For engineers reviewing the 23LCV512-E/P datasheet, 23LCV512-E/P pinout, 23LCV512-E/P application, or 23LCV512-E/P equivalent, key selection criteria include VBAT-supported data retention, SDI dual-I/O capability for higher throughput, standby current ≤4 µA at +85°C, and compatibility with PIC® and other SPI-host microcontrollers in space-constrained PDIP layouts.
Technical Context
The 23LCV512-E/P implements a serial SRAM architecture with SPI-compatible bus interface and optional SDI (Serial Dual Interface) mode enabled via EDIO/RSTIO commands. Its internal MODE register configures Byte, Page (2048 × 32-byte), or Sequential operation - all supporting MSb-first transmission and automatic address incrementing.
It integrates an internal voltage-sensing switch that transitions to VBAT (1.4–3.6 V) when VCC drops below VTRIP (1.6–2.0 V), preserving RAM contents without external circuitry. The device powers on in Standby mode and requires CS low-to-high transition to initiate active communication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8-bit), enabling storage of 65,536 bytes of volatile data with byte/page/sequential access |
| Interface Speed | 20 MHz max clock frequency - supports high-throughput data logging at up to 2.5 MB/s in SDI mode |
| Supply Range | 2.5–5.5 V - compatible with both 3.3 V and 5 V microcontroller I/O domains without level shifting |
| Standby Current | 4 µA at +85°C - enables multi-year battery-backed operation in maintenance-free remote sensors |
| VBAT Retention | 1.0 V minimum data retention voltage - maintains SRAM state down to coin-cell depletion thresholds |
| Page Size | 32-byte page - optimizes burst writes while minimizing overwrites during partial-page updates |
| Operating Temp | −40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor metering |
Pinout & Package
23LCV512-E/P is housed in an 8-lead Plastic Dual In-Line Package (PDIP, 300 mil body), with pin 1 marked by notch or dot. The package is through-hole mountable, RoHS-compliant, and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select Input | Active-low enable; places device in Standby (high-Z SO) when deasserted; required for all operations |
| SO/SIO1 (Pin 2) | Serial Output / SDI Pin | Outputs data during SPI reads; functions as bidirectional I/O in SDI mode for dual-bit transfers per clock |
| NC (Pin 3) | No Connect | Internally unconnected; must remain floating or grounded per layout best practice |
| VSS (Pin 4) | Ground Reference | Primary return path for VCC and VBAT supplies; requires low-impedance PCB connection |
| SI/SIO0 (Pin 5) | Serial Input / SDI Pin | Accepts instructions, addresses, and data on rising SCK edge; shares function with SIO0 in SDI mode |
| SCK (Pin 6) | Serial Clock Input | Master-generated clock synchronizing all SPI/SDI transfers; rise/fall times ≤20 ns specified |
| VBAT (Pin 7) | External Backup Supply | Provides power to retain SRAM when VCC < VTRIP (1.6–2.0 V); must be ≥1.4 V to sustain data |
| VCC (Pin 8) | Primary Power Supply | Supplies active operation; decoupling capacitor (0.1 µF) required near pin for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Unlimited Read/Write Cycles | Enables continuous data logging in telemetry nodes without wear-out concerns over product lifetime |
| Zero Write Time | Eliminates wait states during write operations - critical for real-time event capture in safety-critical systems |
| SDI Dual-I/O Mode | Doubles effective throughput vs. standard SPI by transferring two bits per clock cycle using SIO0/SIO1 |
| VBAT Data Retention | Maintains full 64K × 8-bit memory state during main power failure, supporting seamless recovery after brownout |
| Pb-Free & RoHS Compliance | Meets global environmental regulations for industrial and consumer equipment manufacturing |
Applications
| Smart Energy Metering | Industrial PLC Data Buffer |
|---|---|
Use Scenario: Storing tariff schedules, consumption logs, and firmware update staging in electricity/water/gas meters with intermittent mains power. IC Role / Device Role / Timing Role: Nonvolatile SRAM buffer interfacing directly with metrology SoC via SPI, retaining critical billing data during grid outages. Use Value: Eliminates need for external EEPROM or FRAM, reducing BOM count while guaranteeing data integrity across >10-year field deployment. | Use Scenario: Capturing sensor inputs and control state snapshots in programmable logic controllers during runtime and power-down sequences. IC Role / Device Role / Timing Role: High-speed scratchpad memory co-located with FPGA or ARM-based controller, accessed in sequential mode for cyclic buffer management. Use Value: Enables deterministic sub-millisecond write latency and zero-cycle erase overhead versus flash-based alternatives. |
| Medical Diagnostic Device Cache | Automotive Body Control Module |
Use Scenario: Temporary storage of waveform buffers, calibration coefficients, and fault logs in portable ultrasound or ECG units powered by rechargeable batteries. IC Role / Device Role / Timing Role: Battery-backed SRAM acting as last-resort memory during unexpected shutdown, preserving diagnostic session data. Use Value: Supports VBAT operation down to 1.0 V - extends data retention window beyond Li-ion cutoff voltage (2.5–3.0 V). | Use Scenario: Storing door lock status, mirror position presets, and lighting configuration in vehicle BCMs subject to cold cranking and load dump transients. IC Role / Device Role / Timing Role: SPI-connected memory holding user preferences and system state, automatically switching to VBAT during ignition-off periods. Use Value: VTRIP threshold (1.6–2.0 V) ensures seamless handover to backup supply before CAN/LIN bus resets occur. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 23LC1024-I/P | 1 Mbit capacity, same 2.5–5.5 V range, identical PDIP-8 package and pinout | Supports larger firmware staging or extended logging buffers; no change to host driver required | Select when >512 Kbit memory is needed without redesigning PCB layout or firmware timing |
| FM25V20A-G | F-RAM technology, 2 Mbit, 2.7–3.6 V only, 40 MHz SPI, no VBAT pin | Eliminates write endurance limits but lacks battery backup; requires external supercapacitor for power-loss holdup | Choose for ultra-high-write-cycle applications where VBAT is not mandatory and supply is strictly 3.3 V |
Compared with 23LCV512-E/P, the 23LC1024-I/P offers double memory density in identical form factor, while FM25V20A-G trades VBAT support for F-RAM's infinite endurance and faster writes - making each suitable for distinct reliability and power architecture priorities.
Availability
23LCV512-E/P is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, medical diagnostics, and automotive body control modules requiring stable component supply across long production lifecycles.
Supply support for 23LCV512-E/P 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 microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 23LCV512 belongs to Microchip's serial SRAM product line, engineered for embedded systems needing fast, reliable, battery-backed memory with minimal footprint and SPI-native integration.
FAQ
What is the maximum clock frequency supported by the 23LCV512-E/P?
The 23LCV512-E/P supports a maximum clock frequency of 20 MHz in both SPI and SDI modes, as specified in Table 1-2 AC Characteristics. This allows sustained data transfer rates up to 2.5 MB/s in standard SPI and up to 5 MB/s in SDI mode, provided host timing margins and PCB signal integrity meet the 20 ns rise/fall time requirement.
Does the 23LCV512-E/P require external circuitry to use the VBAT backup feature?
No, the 23LCV512-E/P includes an internal voltage-sensing switch that automatically transitions from VCC to VBAT when VCC falls below the VTRIP threshold (1.6–2.0 V). No external diodes, regulators, or switching logic are needed - simply connect a 1.4–3.6 V backup source (e.g., coin cell or supercapacitor) to pin 7 (VBAT) and tie VSS to ground.
Can the 23LCV512-E/P operate in both SPI and SDI modes on the same hardware?
Yes, the 23LCV512-E/P supports dynamic mode switching: it defaults to SPI mode at power-up and enters SDI mode upon receiving the EDIO command (0x3B). The RSTIO command (0xFF) exits SDI mode. Pin assignments differ - SO/SI become SIO1/SIO0 in SDI mode - but share physical pins 2 and 5, so no hardware modification is required.
What is the data retention capability of the 23LCV512-E/P when powered solely by VBAT?
When powered exclusively by VBAT, the 23LCV512-E/P guarantees data retention down to 1.0 V (D011), as confirmed in Table 1-1 DC Characteristics. At typical VBAT = 2.5 V and 25°C, leakage is only 1 µA (D014), enabling multi-year retention from a standard CR2032 coin cell without additional regulation or buffering.
Is the 23LCV512-E/P pin-compatible with other members of the 23LCVxx family?
Yes, the 23LCV512-E/P shares identical 8-lead PDIP pinout and electrical interface with 23LCV1024-E/P and 23LCV256-E/P. All support the same instruction set, MODE register format, and VBAT functionality. Firmware and PCB layout are fully reusable across this family, differing only in memory depth and part marking.
23LCV512-E/P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Synchronous
- Memory Size:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- SPI - Dual I/O
- Clock Frequency:
- 20 MHz
- Write Cycle Time - Word, Page:
- -
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
23LCV512-E/P FAQ
1.How can I place an order for 23LCV512-E/P through Aetrix?
Please submit a Request for Quotation (RFQ) for 23LCV512-E/P 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 23LCV512-E/P reliable?
The price and inventory of 23LCV512-E/P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 23LCV512-E/P is usually 5 days.
3.What payment methods are accepted for 23LCV512-E/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23LCV512-E/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 23LCV512-E/P?
23LCV512-E/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 23LCV512-E/P 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 23LCV512-E/P?
For technical support, including 23LCV512-E/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23LCV512-E/P requirements.
6.How does Aetrix verify that 23LCV512-E/P is sourced from the original manufacturer or authorized distributors?
All 23LCV512-E/P 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 23LCV512-E/P meets industry standards.
7.What is the process for return or replacement of 23LCV512-E/P?
All 23LCV512-E/P units undergo pre-shipment inspection (PSI). If there is an issue with 23LCV512-E/P, 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 23LCV512-E/P part is unused and in its original packaging.
Return procedure for 23LCV512-E/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
23LCV512-E/P Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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