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Microchip Technology 23LCV512T-E/ST
- Part No.:
- 23LCV512T-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
23LCV512T-E/ST.pdf
- Description:
- IC SRAM 512KBIT SPI/DUAL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,869
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Product details
Overview
23LCV512T-E/ST 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, and 64K × 8-bit organization with 32-byte pages - deployed in industrial data loggers requiring nonvolatile memory retention during main power loss.
For engineers reviewing the 23LCV512T-E/ST datasheet, 23LCV512T-E/ST pinout, 23LCV512T-E/ST application, or 23LCV512T-E/ST equivalent, key selection criteria include VBAT-supported data retention down to 1.0 V, SDI dual-I/O capability for bandwidth-sensitive hosts, standby current of 4 µA at +85°C, and TSSOP-8 packaging for space-constrained PCB layouts.
Technical Context
The 23LCV512T-E/ST implements a true serial SRAM architecture with SPI-compatible command protocol (0x02 WRITE, 0x03 READ) and optional SDI mode enabled via EDIO (0x3B) instruction. Its MODE register (bits 7–6) selects Byte, Page, or Sequential operation - enabling flexible access granularity without external address latches.
Internally, it integrates an automatic address pointer that rolls over at FFFFh in Sequential mode and wraps within page boundaries in Page mode (2048 × 32-byte pages). The VBAT switch activates at VTRIP = 1.6–2.0 V, sustaining RAM contents solely from external coin-cell supply when VCC drops below threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8-bit), supporting byte/page/sequential access without external address decoding |
| Interface | SPI-compatible serial bus with optional SDI (dual I/O) mode for doubled throughput on compatible hosts |
| Max Clock Frequency | 20 MHz - enables 2.5 MB/s peak data rate in SDI mode, critical for high-speed logging |
| VCC Range | 2.5–5.5 V - interoperable with 3.3 V and 5 V microcontrollers without level-shifting |
| VBAT Retention | Operates from 1.4–3.6 V backup supply; retains data down to 1.0 V VDD with VTRIP = 1.8 V typical |
| Standby Current | 4 µA at +85°C - minimizes battery drain in always-on backup configurations |
| Endurance | Unlimited read/write cycles - eliminates wear-leveling firmware overhead in cyclic buffer applications |
Pinout & Package
23LCV512T-E/ST is housed in an 8-lead TSSOP package (4.4 mm body width), optimized for automated assembly and thermal performance in compact industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select Input | Active-low enable; places device in Standby (high-Z SO) when deasserted - enables multi-device SPI bus sharing |
| SIO1/SO (Pin 2) | Serial Output / SDI Pin | Outputs data in SPI mode; serves as second I/O in SDI mode - requires host coordination for mode switching |
| NC (Pin 3) | No Connect | Internally unconnected; must remain floating or tied to GND per layout best practice |
| VSS (Pin 4) | Ground Reference | Primary return path for VCC and VBAT supplies - requires low-impedance PCB plane connection |
| SIO0/SI (Pin 5) | Serial Input / SDI Pin | Accepts commands/addresses/data in SPI mode; functions as bidirectional I/O in SDI mode |
| SCK (Pin 6) | Serial Clock Input | Synchronizes all transfers; rising edge latches SI, falling edge updates SO - defines timing budget for host firmware |
| VBAT (Pin 7) | External Backup Supply | Provides retention power when VCC < VTRIP; internal switch isolates VCC/ VBAT domains automatically |
| VCC (Pin 8) | Primary Power Supply | Supplies active operation; powers internal logic and memory array - decoupling capacitor mandatory |
Key Features
| Feature | Design Value |
|---|---|
| Zero Write Time | Eliminates write-cycle delays - enables real-time timestamped data capture without blocking host CPU |
| SDI Dual-I/O Interface | Doubles effective throughput vs. standard SPI - reduces transaction count for burst transfers in telemetry systems |
| Page Write Mode | Supports 32-byte aligned writes with auto-increment - simplifies firmware for sensor frame buffering |
| Industrial Temp Range | -40°C to +85°C operation - validated for deployment in outdoor metering and factory-floor controllers |
| Pb-Free & RoHS Compliant | Meets global environmental compliance requirements - supports export to EU, China, and Japan markets |
Applications
| Smart Energy Metering | Industrial PLC Data Logging |
|---|---|
Use Scenario: Captures voltage/current waveforms and tariff events during mains outage using coin-cell backup. IC Role / Device Role / Timing Role: Nonvolatile SRAM buffer retaining up to 64 KB of time-stamped measurements without EEPROM wear. Use Value: Enables >10-year field deployment with zero data loss during brownouts, leveraging VBAT retention at 1.0 V. | Use Scenario: Stores machine cycle timestamps, fault codes, and diagnostic snapshots in programmable logic controllers. IC Role / Device Role / Timing Role: High-speed serial memory interfaced directly to ARM Cortex-M SPI peripheral for deterministic write latency. Use Value: Achieves sub-millisecond write response with zero wait states, outperforming parallel SRAM in footprint-constrained DIN-rail modules. |
| Medical Infusion Pump Memory | Automotive Telematics Event Buffer |
Use Scenario: Logs drug delivery parameters, occlusion alerts, and calibration history with tamper-resistant retention. IC Role / Device Role / Timing Role: Battery-backed SRAM ensuring audit-trail integrity during AC power removal or battery swap. Use Value: Meets IEC 62304 Class C software safety requirements via guaranteed data persistence below 1.8 V VTRIP. | Use Scenario: Buffers GPS position, CAN bus error frames, and crash-triggered sensor data before flash upload. IC Role / Device Role / Timing Role: Burst-capable memory accepting sequential writes at 20 MHz to capture transient vehicle events. Use Value: Reduces MCU firmware complexity by eliminating wear leveling and erase management required by flash. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 23LC1024T-E/ST | 1 Mbit capacity, identical VCC/VBAT specs and pinout - double memory density in same TSSOP-8 footprint | Required where longer event history or larger configuration storage is needed without PCB redesign | Select when >512 Kbit memory is mandated and SDI interface compatibility is retained |
| FM25V05-G | F-RAM technology: 512 Kbit, 3.0–3.6 V only, no VBAT pin - intrinsic nonvolatility eliminates backup circuitry | Suitable for 3.3 V-only systems prioritizing zero-write-delay and infinite endurance over wide-VCC flexibility | Choose when system operates strictly at 3.3 V and seeks elimination of external battery components |
Compared with 23LCV512T-E/ST, the 23LC1024T-E/ST offers scalable density with identical interface behavior, while FM25V05-G trades VCC range and VBAT support for inherent nonvolatility and lower active current - guiding selection based on power architecture and retention strategy.
Availability
23LCV512T-E/ST is available at Aetrix Electronics and suitable for industrial data loggers, medical device audit trails, automotive telematics buffers, and smart metering systems requiring stable component supply across extended product lifecycles.
Supply support for 23LCV512T-E/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 microcontroller, analog, FPGA, and memory solutions, serving industrial, automotive, and consumer markets with vertically integrated silicon and development tools.
The 23LCV512T-E/ST belongs to Microchip's serial SRAM family designed for seamless integration into resource-constrained embedded systems needing reliable, low-latency, battery-backed memory without EEPROM limitations.
FAQ
What is the maximum clock frequency supported by the 23LCV512T-E/ST?
The 23LCV512T-E/ST supports a maximum clock frequency of 20 MHz in both SPI and SDI modes. This allows for high-speed data transfer rates essential in applications such as real-time data logging and telemetry buffering. Electrical characteristics confirm stable operation up to this frequency across the full industrial temperature range (-40°C to +85°C), with timing parameters like TCSS (CS setup time) and Tsu (data setup time) specified accordingly.
Does the 23LCV512T-E/ST require external hardware for battery backup operation?
Yes, the 23LCV512T-E/ST requires an external battery or coin cell connected to the VBAT pin (Pin 7) to maintain data during main power loss. The device includes an internal switch that automatically transitions to VBAT when VCC falls below the VTRIP threshold (1.6–2.0 V). No additional controller or charging circuitry is needed - simply connect a 1.4–3.6 V source (e.g., CR2032) with appropriate decoupling.
How does the 23LCV512T-E/ST handle memory addressing in Page mode?
In Page mode (MODE[7:6] = 10b), the 23LCV512T-E/ST organizes memory into 2048 pages of 32 bytes each. When writing or reading, the internal address counter increments automatically within the selected page boundary. If the operation reaches the last byte (offset 31), the counter wraps to the first byte of the same page - preventing unintended cross-page access unless explicitly readdressed.
Can the 23LCV512T-E/ST be used with microcontrollers lacking native SPI hardware?
Yes, the 23LCV512T-E/ST can be interfaced with GPIO-based bit-banged SPI on microcontrollers without dedicated hardware peripherals. Its protocol uses standard SPI timing (MSb-first, rising-edge sample/falling-edge output), and all instructions (READ 0x03, WRITE 0x02, RDMR 0x05, etc.) are fully documented. Firmware must manage CS assertion, clock generation, and data shifting - verified across PIC, AVR, and ARM Cortex-M families.
What is the meaning of "T-E/ST" in the part number 23LCV512T-E/ST?
In 23LCV512T-E/ST, "T" denotes tape-and-reel packaging, "E" indicates lead-free (Pb-free) and RoHS-compliant construction, and "ST" specifies the 8-lead TSSOP package (4.4 mm body width). This suffix confirms industrial-grade (-40°C to +85°C) operation, halogen-free materials, and surface-mount compatibility - distinguishing it from SOIC (SN) and PDIP (P) variants of the same base device.
23LCV512T-E/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:
- 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:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
23LCV512T-E/ST FAQ
1.How can I place an order for 23LCV512T-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 23LCV512T-E/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-E/ST reliable?
The price and inventory of 23LCV512T-E/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-E/ST is usually 5 days.
3.What payment methods are accepted for 23LCV512T-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23LCV512T-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 23LCV512T-E/ST?
23LCV512T-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 23LCV512T-E/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-E/ST?
For technical support, including 23LCV512T-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23LCV512T-E/ST requirements.
6.How does Aetrix verify that 23LCV512T-E/ST is sourced from the original manufacturer or authorized distributors?
All 23LCV512T-E/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-E/ST meets industry standards.
7.What is the process for return or replacement of 23LCV512T-E/ST?
All 23LCV512T-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 23LCV512T-E/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-E/ST part is unused and in its original packaging.
Return procedure for 23LCV512T-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
23LCV512T-E/ST Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
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
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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