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Microchip Technology 23LCV512T-I/ST
- Part No.:
- 23LCV512T-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
23LCV512T-I/ST.pdf
- Description:
- IC SRAM 512KBIT SPI/DUAL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,053
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Product details
Overview
23LCV512T-I/ST from Microchip Technology Inc. is a 512-Kbit SPI Serial SRAM with battery backup support, SDI interface, and industrial temperature range (−40°C to +85°C). It features 64K × 8-bit organization, 20 MHz clock rate, 3 mA read current at 5.5 V, and zero write time. Used in embedded systems requiring nonvolatile data retention during main power loss, such as smart meters and industrial controllers.
For engineers reviewing the 23LCV512T-I/ST datasheet, 23LCV512T-I/ST pinout, 23LCV512T-I/ST application, or 23LCV512T-I/ST equivalent, key selection criteria include VBAT-supported data retention, SDI mode for higher throughput, 8-lead TSSOP package compatibility, and guaranteed operation across −40°C to +85°C.
Technical Context
The 23LCV512T-I/ST implements a serial SRAM architecture accessed via SPI-compatible bus with optional SDI (Serial Dual Interface) mode enabled by EDIO/RSTIO commands. It supports three operational modes-Byte, Page (32-byte), and Sequential-controlled via a writable MODE register. Internal address pointer auto-increments and wraps at array boundaries.
It integrates an internal voltage-switching circuit that transitions to VBAT (1.4–3.6 V) when VCC drops below VTRIP (1.6–2.0 V typical), preserving RAM contents without external supervision. Standby current is 4 µA at +85°C, and all I/O pins meet standard SPI voltage thresholds (VIH ≥ 0.7×VCC, VIL ≤ 0.1×VCC).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8-bit); supports byte/page/sequential access with automatic address wrap |
| Interface | SPI-compatible with SDI mode; dual I/O capability doubles effective data rate in compatible host systems |
| Max Clock Frequency | 20 MHz; enables up to 2.5 MB/s raw throughput in SPI mode, higher in SDI |
| VCC Range | 2.5 V to 5.5 V; compatible with both 3.3 V and 5 V microcontroller I/O domains |
| VBAT Support | Backup supply input (1.4–3.6 V); maintains data when VCC falls below 1.6–2.0 V trip point |
| Operating Temp | −40°C to +85°C (Industrial grade); validated for use in harsh environments without derating |
| Read Current | 3 mA typical at 5.5 V, 20 MHz; low active power enables battery-backed portable designs |
Pinout & Package
23LCV512T-I/ST is housed in an 8-lead TSSOP package (4.4 mm body width), RoHS-compliant and halogen-free. Pin 3 is NC (No Connect); all other pins match SOIC/PDIP functional mapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select Input | Active-low enable; forces device into standby when high; required for bus sharing |
| 2 SO/SIO1 | Serial Output / SDI Data Line 1 | Outputs data in SPI mode; bidirectional in SDI mode (MSB-first dual-bit transfers) |
| 3 NC | No Connect | Not internally bonded; must be left floating or tied to ground per layout best practice |
| 4 VSS | Ground Reference | Primary return path for VCC and VBAT; requires low-impedance PCB connection |
| 5 SI/SIO0 | Serial Input / SDI Data Line 0 | Accepts instructions/addresses/data in SPI mode; bidirectional in SDI mode |
| 6 SCK | Serial Clock Input | Synchronizes all transfers; data latched on rising edge (SI), output updated after falling edge (SO) |
| 7 VBAT | External Backup Supply | Provides uninterrupted power to retain SRAM data when VCC < VTRIP; requires coin cell or supercap |
| 8 VCC | Main Power Supply | Supplies core logic and I/O; decoupling capacitor mandatory near pin |
Key Features
| Feature | Design Value |
|---|---|
| Unlimited Read/Write Cycles | Enables continuous logging or configuration storage without wear-out concerns over product lifetime |
| Zero Write Time | Eliminates wait states during write operations; improves real-time responsiveness in time-critical firmware |
| SDI Mode Support | Doubles effective bandwidth vs. standard SPI using SIO0/SIO1; reduces transaction latency in high-throughput hosts |
| Page Write (32-byte) | Reduces command overhead for burst writes; avoids repeated instruction/address transmission within page boundary |
| Automatic Address Wrap | Allows seamless circular buffer implementation without software address management or overflow checks |
Applications
| Smart Energy Metering | Industrial PLC Data Logging |
|---|---|
Use Scenario: Storing tariff schedules, consumption history, and event logs in electricity/water/gas meters with frequent power interruptions. IC Role / Device Role / Timing Role: Nonvolatile SRAM buffer retaining critical metering data during AC mains dropout or battery swap. Use Value: VBAT ensures zero data loss during brownouts; 20 MHz SPI enables fast firmware updates and log dumps via communication modules. | Use Scenario: Capturing sensor readings, alarm timestamps, and control state snapshots in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: High-speed, low-power memory for cyclic data buffering between scan cycles and HMI/cloud upload. Use Value: 3 mA read current at 20 MHz allows real-time access without thermal throttling; industrial temp rating ensures reliability in uncooled enclosures. |
| Medical Diagnostic Device Configuration | Automotive Telematics Event Buffering |
Use Scenario: Holding calibration coefficients, user preferences, and last-known diagnostic state in portable ultrasound or ECG units. IC Role / Device Role / Timing Role: Battery-backed SRAM preserving settings across shutdowns and battery replacements. Use Value: VTRIP of 1.6–2.0 V aligns with common Li-ion cutoff voltages; 4 µA standby current extends backup battery life to years. | Use Scenario: Recording crash-triggered CAN bus frames, GPS coordinates, and system status before and after impact in vehicle telematics units. IC Role / Device Role / Timing Role: High-speed ring buffer capturing time-stamped telemetry during transient events. Use Value: Sequential mode + auto-wrap enables continuous capture without CPU intervention; SDI mode accelerates post-event data retrieval. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 23LC1024T-I/ST | 1 Mbit capacity (128K × 8), same VCC/VBAT specs, identical pinout and timing | Supports larger firmware overlays or extended logging duration; requires no PCB change | Select when >512 Kbit memory is needed without redesigning layout or firmware interface layer |
| FM25V05-G | F-RAM technology; 512 Kbit, 3 V only, no VBAT pin, 25 MHz max clock, 150 µA read current | Eliminates write endurance limits but lacks battery backup; higher active power | Choose for ultra-high-write-cycle applications where VBAT is not required and 3 V supply is fixed |
Compared with 23LCV512T-I/ST, the 23LC1024T-I/ST offers double density in identical packaging and electrical behavior, while FM25V05-G trades VBAT support and lower active current for unlimited write endurance and faster clocking-but only at 3 V and without backup capability.
Availability
23LCV512T-I/ST is available at Aetrix Electronics and suitable for smart metering, industrial data logging, medical diagnostics, and automotive telematics requiring stable component supply across long production lifecycles.
Supply support for 23LCV512T-I/ST 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 high-reliability silicon and development tools.
The 23LCV512T-I/ST belongs to Microchip's serial SRAM product line, designed specifically for applications needing fast, low-power, battery-backed memory with SPI simplicity and industrial-grade robustness.
FAQ
What is the VBAT operating range and trip point for the 23LCV512T-I/ST?
The 23LCV512T-I/ST accepts VBAT from 1.4 V to 3.6 V. Its internal switch activates when VCC drops below the VTRIP threshold, specified as 1.6 V (min), 1.8 V (typ), and 2.0 V (max) at 25°C. This ensures reliable data retention during main power failure without external supervision. The 23LCV512T-I/ST uses this transition to seamlessly maintain SRAM contents using the external backup source.
Does the 23LCV512T-I/ST support true dual-SPI (quad-SPI) or only SDI mode?
The 23LCV512T-I/ST supports Serial Dual Interface (SDI) mode only-not quad-SPI. SDI uses SIO0 and SIO1 pins to transfer two bits per clock cycle, doubling throughput versus standard SPI. It does not implement QSPI's four-wire protocol or quad I/O commands. The 23LCV512T-I/ST enters SDI mode via the EDIO command (0x3B) and exits via RSTIO (0xFF), as defined in its instruction set.
What are the valid operating modes and how is the MODE register configured in the 23LCV512T-I/ST?
The 23LCV512T-I/ST supports Byte (00), Page (10), and Sequential (01) modes via bits 7–6 of the MODE register; bit pattern 11 is reserved. The default power-on state is Sequential mode. The register is read with RDMR (0x05) and written with WRMR (0x01). Bits 0–5 are reserved and must remain zero. The 23LCV512T-I/ST relies on this register to determine internal address increment behavior and boundary handling.
Can the 23LCV512T-I/ST be used without connecting VBAT?
Yes-the 23LCV512T-I/ST operates fully without VBAT. If unused, Microchip recommends connecting VBAT to VSS (ground) to prevent noise coupling or floating node issues. All memory functions-including read, write, and standby-are unaffected. VBAT is strictly optional for data retention during VCC loss; the 23LCV512T-I/ST performs identically in SPI/SDI operation with VBAT grounded or disconnected.
What is the maximum supported clock frequency and corresponding timing parameter for the 23LCV512T-I/ST?
The 23LCV512T-I/ST supports up to 20 MHz clock frequency (FCLK), verified across the full industrial temperature range (−40°C to +85°C). Key timing parameters include TCSS (CS setup time) ≥25 ns, Tsu (data setup) ≥10 ns, and TV (output valid) ≤25 ns. These values ensure reliable operation with standard microcontroller SPI peripherals and level-shifted interfaces. The 23LCV512T-I/ST meets all AC specifications at this maximum rate without derating.
23LCV512T-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
23LCV512T-I/ST FAQ
1.How can I place an order for 23LCV512T-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 23LCV512T-I/ST 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 23LCV512T-I/ST reliable?
The price and inventory of 23LCV512T-I/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 23LCV512T-I/ST is usually 5 days.
3.What payment methods are accepted for 23LCV512T-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23LCV512T-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 23LCV512T-I/ST?
23LCV512T-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 23LCV512T-I/ST 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 23LCV512T-I/ST?
For technical support, including 23LCV512T-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23LCV512T-I/ST requirements.
6.How does Aetrix verify that 23LCV512T-I/ST is sourced from the original manufacturer or authorized distributors?
All 23LCV512T-I/ST 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 23LCV512T-I/ST meets industry standards.
7.What is the process for return or replacement of 23LCV512T-I/ST?
All 23LCV512T-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 23LCV512T-I/ST, 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 23LCV512T-I/ST part is unused and in its original packaging.
Return procedure for 23LCV512T-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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