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Microchip Technology 23LCV512-I/ST
- Part No.:
- 23LCV512-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
23LCV512-I/ST.pdf
- Description:
- IC SRAM 512KBIT SPI/DUAL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:528
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Product details
Overview
23LCV512-I/ST from Microchip Technology is a 512 Kbit (64K × 8) industrial-grade SPI Serial SRAM with external battery backup support via VBAT pin, 20 MHz max clock rate, 2.5–5.5 V supply range, and SDI dual-interface capability. It delivers zero write time, unlimited read/write cycles, and operates across –40°C to +85°C for use in power-fail-safe data logging systems.
For engineers reviewing the 23LCV512-I/ST datasheet, 23LCV512-I/ST pinout, 23LCV512-I/ST application, or 23LCV512-I/ST equivalent, key selection criteria include VBAT retention voltage (1.0 V), standby current (4 µA at +85°C), SPI/SDI mode flexibility, page/sequential access modes, and TSSOP-8 package compatibility with legacy SOIC/PDIP footprints.
Technical Context
The 23LCV512-I/ST implements a true serial SRAM architecture with an 8-bit instruction register and MSb-first SPI protocol compliance. It supports three user-selectable operation modes-Byte (00), Page (10), and Sequential (01)-via a writable MODE register, enabling flexible memory access without address pointer rollover constraints in sequential mode.
Its dual-interface capability uses shared SI/SIO0 and SO/SIO1 pins for SDI mode, entered via EDIO (0x3B) command and exited via RSTIO (0xFF); VBAT switching occurs automatically at VTRIP = 1.6–2.0 V, maintaining data integrity when VCC drops below this threshold while sourcing only 1 µA typical backup current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8-bit organization), supporting byte/page/sequential reads/writes |
| Supply Voltage | 2.5–5.5 V - enables direct interface with 3.3 V and 5 V microcontrollers without level shifting |
| Max Clock Frequency | 20 MHz - supports high-throughput data buffering in real-time control loops |
| Standby Current | 4 µA at +85°C - ensures ultra-low power retention during system sleep states |
| VBAT Retention Voltage | 1.0 V minimum - guarantees RAM data hold-down even under deep brown-out conditions |
| Interface Modes | SPI (SI/SO) and SDI (SIO0/SIO1) - doubles effective throughput in compatible host systems |
| Page Size | 32 bytes - optimizes burst writes within single-page boundaries without wraparound |
Pinout & Package
23LCV512-I/ST is packaged in an 8-lead TSSOP (4.4 mm body width), RoHS-compliant, halogen-free plastic package with standard 0.65 mm lead pitch and exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select Input | Active-low enable; forces device into high-impedance standby when high, allowing multi-drop SPI bus sharing |
| SO/SIO1 (Pin 2) | Serial Output / SDI Data Line 1 | Outputs data in SPI mode; functions as second bidirectional data line in SDI mode for dual-bit-per-clock transfers |
| NC (Pin 3) | No Connect | Internally unconnected; must be left floating or tied to ground per layout best practice |
| VSS (Pin 4) | Ground Reference | Primary return path for VCC and VBAT supplies; requires low-inductance connection to system ground plane |
| SI/SIO0 (Pin 5) | Serial Input / SDI Data Line 0 | Accepts instructions/addresses/data in SPI mode; serves as first bidirectional data line in SDI mode |
| SCK (Pin 6) | Serial Clock Input | Edge-triggered synchronous interface clock; rising edge latches input, falling edge updates output |
| VBAT (Pin 7) | External Backup Supply Input | Connects to coin cell or supercapacitor; internal switch engages when VCC falls below 1.6–2.0 V (VTRIP) |
| VCC (Pin 8) | Primary Power Supply | Supplies core logic and memory array; decoupling capacitor (0.1 µF) required adjacent to pin |
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 after write commands - critical for deterministic response in real-time interrupt handlers |
| SDI Dual-Interface Mode | Doubles effective data rate versus standard SPI by transferring two bits per clock cycle using SIO0/SIO1 |
| Industrial Temperature Range | –40°C to +85°C operation validated per JEDEC JESD22-A104 - suitable for automotive under-hood and factory automation |
| Page and Sequential Access | Supports efficient block transfers (32-byte pages) or seamless full-array streaming without manual address management |
Applications
| Industrial Data Logger | Medical Device Memory Buffer |
|---|---|
Use Scenario: Continuous sensor sampling in remote environmental monitoring units powered by intermittent solar/battery sources. IC Role / Device Role / Timing Role: Nonvolatile SRAM buffer holding timestamped measurements during main power loss until recovery. Use Value: VBAT retention at 1.0 V ensures >24-hour data hold with CR2032 coin cell; 4 µA standby current extends battery life between uploads. | Use Scenario: Temporary storage of ECG waveform segments in portable diagnostic equipment prior to Bluetooth transmission. IC Role / Device Role / Timing Role: High-speed write buffer interfacing directly with ADC controller via SPI at 20 MHz clock. Use Value: Zero write time eliminates pipeline stalls; sequential mode enables uninterrupted 16-bit sample streaming across full 64K address space. |
| Automotive Telematics Unit | POS Terminal Transaction Cache |
Use Scenario: Storing GPS trackpoints and CAN bus event logs during vehicle ignition-off periods. IC Role / Device Role / Timing Role: Battery-backed memory node retaining critical trip data when main 12 V rail collapses. Use Value: Automatic VBAT switchover at 1.8 V typical (1.6–2.0 V range) preserves integrity without host firmware intervention. | Use Scenario: Secure caching of encrypted payment session data in retail terminals during network outages. IC Role / Device Role / Timing Role: Tamper-resistant SRAM holding cryptographic keys and transaction payloads before EEPROM commit. Use Value: Unlimited endurance prevents degradation from frequent session writes; TSSOP-8 footprint allows compact PCB integration near secure MCU. |
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/ST | 1 Mbit capacity (128K × 8), identical VCC range, timing, and pinout; same VBAT architecture | Requires no layout change but doubles memory depth for extended logging buffers | Select when >512 Kbit storage is needed without redesigning SPI interface or power management |
| FM25V05-G | F-RAM technology: 512 Kbit, 2.7–3.6 V only, 25 MHz max clock, no VBAT pin, <100 ns write time | Lacks battery backup; relies on fast write for data safety; narrower voltage window limits MCU compatibility | Choose for lower-power, higher-speed write-intensive apps where VBAT is unnecessary and supply stays within 2.7–3.6 V |
Compared with 23LCV512-I/ST, 23LC1024-I/ST offers scalable capacity in identical packaging and electrical behavior, while FM25V05-G trades VBAT support and wide VCC range for nanosecond write latency and F-RAM endurance - making each suitable for distinct system-level trade-offs in power, retention, and speed.
Availability
23LCV512-I/ST is available at Aetrix Electronics and suitable for industrial data loggers, medical device buffers, automotive telematics units, and POS terminal caches requiring stable component supply and long-term lifecycle assurance.
Supply support for 23LCV512-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 microcontroller, mixed-signal, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 23LCV512-I/ST belongs to Microchip's serial SRAM product line, engineered for reliable, low-power, battery-backed data retention in harsh environments where EEPROM write latency or flash endurance limitations are unacceptable.
FAQ
What is the maximum clock frequency supported by the 23LCV512-I/ST?
The 23LCV512-I/ST supports a maximum clock frequency of 20 MHz in both SPI and SDI modes, as specified in the AC Characteristics table (Param. No. 1, FCLK). This allows high-speed data transfer up to 20 MB/s in SDI mode (two bits per clock) or 2.5 MB/s in standard SPI mode, verified across the full industrial temperature range (–40°C to +85°C).
Does the 23LCV512-I/ST require external hardware to enable battery backup functionality?
Yes - the 23LCV512-I/ST requires an external coin cell or supercapacitor connected to the VBAT pin (Pin 7). Its internal analog switch automatically engages when VCC drops below the VTRIP threshold (1.6–2.0 V), sustaining SRAM data at 1.0 V minimum. No external control logic or switching circuitry is needed, but VBAT must be decoupled with a 0.1 µF capacitor per Microchip recommendations.
Can the 23LCV512-I/ST operate in both SPI and SDI modes simultaneously?
No - the 23LCV512-I/ST operates exclusively in either SPI mode (using SI and SO pins) or SDI mode (using SIO0 and SIO1 pins), selected via EDIO (0x3B) or RSTIO (0xFF) commands. Mode persistence is volatile; reset or power cycle reverts to default SPI mode. Host firmware must explicitly manage mode transitions and cannot interleave protocols on the same bus cycle.
What is the page size and how does it affect write operations on the 23LCV512-I/ST?
The 23LCV512-I/ST has a fixed page size of 32 bytes. In Page mode (MODE[7:6] = 10), writes auto-increment the address pointer within that boundary; attempting to write beyond the 32nd byte wraps to the start of the same page. This prevents accidental cross-page corruption but requires software to manage page alignment - unlike Sequential mode, which ignores boundaries and rolls over at 0xFFFF.
Is the 23LCV512-I/ST pin-compatible with other Microchip serial SRAMs like the 23LC512?
Yes - the 23LCV512-I/ST shares identical pinout, function mapping, and package dimensions with the 23LC512-I/ST and 23LC1024-I/ST in TSSOP-8 (ST), SOIC-8 (SN), and PDIP-8 (P) packages. All support the same instruction set, MODE register layout, and VBAT architecture, enabling drop-in replacement where capacity requirements align and VCC range (2.5–5.5 V vs. 2.5–5.5 V) matches.
23LCV512-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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
23LCV512-I/ST FAQ
1.How can I place an order for 23LCV512-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 23LCV512-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 23LCV512-I/ST reliable?
The price and inventory of 23LCV512-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 23LCV512-I/ST is usually 5 days.
3.What payment methods are accepted for 23LCV512-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23LCV512-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 23LCV512-I/ST?
23LCV512-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 23LCV512-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 23LCV512-I/ST?
For technical support, including 23LCV512-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23LCV512-I/ST requirements.
6.How does Aetrix verify that 23LCV512-I/ST is sourced from the original manufacturer or authorized distributors?
All 23LCV512-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 23LCV512-I/ST meets industry standards.
7.What is the process for return or replacement of 23LCV512-I/ST?
All 23LCV512-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 23LCV512-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 23LCV512-I/ST part is unused and in its original packaging.
Return procedure for 23LCV512-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
23LCV512-I/ST Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
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AT24C04C-SSHM-T
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AT24C08C-STUM-T
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