My Inquiry
My Account
Microchip Technology 23LCV512-E/ST
- Part No.:
- 23LCV512-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
23LCV512-E/ST.pdf
- Description:
- IC SRAM 512KBIT SPI/DUAL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,775
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
23LCV512-E/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, 32-byte page size, 20 MHz max clock frequency, and operates from 2.5–5.5 V. 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/ST datasheet, 23LCV512-E/ST pinout, 23LCV512-E/ST application, or 23LCV512-E/ST equivalent, this page delivers verified specifications, package details, functional modes (Byte/Page/Sequential), SDI dual-I/O capability, VBAT backup behavior, and real-world design implications for memory interfacing in resource-constrained microcontroller systems.
Technical Context
The 23LCV512-E/ST implements a true serial SRAM architecture with SPI-compatible bus signaling (CS, SCK, SI, SO) and optional SDI mode using shared SIO0/SIO1 pins. Its MODE register (bits 7–6) configures Byte, Page, or Sequential operation - each with distinct address auto-increment behavior and boundary handling.
Internal voltage switching between VCC and VBAT is governed by a 1.6–2.0 V trip point (D012), enabling seamless data retention when main supply drops below 1.8 V typical. Standby current is 4 µA at +85°C, and read current is 3 mA at 5.5 V/20 MHz - confirming low-power suitability for battery-backed applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8-bit); supports byte/page/sequential access without external address latches. |
| Interface | SPI-compatible with SDI (dual I/O) mode; enables faster throughput via two-bit-per-clock transfers. |
| VCC Range | 2.5–5.5 V; compatible with 3.3 V and 5 V logic domains without level shifting. |
| Max Clock Frequency | 20 MHz; allows ≤50 ns cycle time - suitable for high-speed MCU SPI peripherals. |
| VBAT Support | Backup supply input (1.4–3.6 V); maintains RAM data when VCC falls below 1.8 V typical trip point. |
| Operating Temp | −40°C to +85°C (Industrial grade); validated across full range for reliability in harsh environments. |
| Read Current | 3 mA at 5.5 V/20 MHz; defines active power budget during burst reads in data-logging scenarios. |
| Standby Current | 4 µA at +85°C; enables multi-year coin-cell backup life in always-on monitoring nodes. |
Pinout & Package
23LCV512-E/ST is housed in an 8-lead TSSOP package (4.4 mm body width), RoHS-compliant and halogen-free. Pin 1 is marked with a dot; pin 3 is NC (no connect).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select Input | Active-low enable; places device in standby (high-Z SO) when deasserted - essential for multi-device SPI buses. |
| 2 (SO/SIO1) | Serial Output / SDI Data Line 1 | Outputs data in SPI mode; functions as bidirectional data line 1 in SDI mode - requires pull-up for open-drain compatibility. |
| 3 (NC) | No Connect | Internally unconnected; must be left floating or tied to GND per layout best practices. |
| 4 (VSS) | Ground Reference | Primary return path for VCC and VBAT supplies; requires low-impedance PCB plane for noise immunity. |
| 5 (SI/SIO0) | Serial Input / SDI Data Line 0 | Accepts commands/addresses/data in SPI mode; bidirectional data line 0 in SDI mode - shares pin with SI. |
| 6 (SCK) | Serial Clock Input | Edge-triggered timing reference; rising edge latches SI, falling edge updates SO - defines maximum 20 MHz interface speed. |
| 7 (VBAT) | External Backup Supply Input | Connects to coin cell or supercap; internal switch engages automatically when VCC < 1.8 V - preserves RAM contents without firmware intervention. |
| 8 (VCC) | Main Power Supply | Primary operating voltage (2.5–5.5 V); powers core logic and I/O; decoupling capacitor required within 10 mm. |
Key Features
| Feature | Design Value |
|---|---|
| Zero Write Time | Immediate write completion upon CS high - eliminates polling or status checking, simplifying firmware. |
| Unlimited Read/Write Cycles | No endurance limitation on memory array - ideal for high-frequency logging or buffer applications. |
| SDI Dual-I/O Mode | Doubles effective data rate vs. standard SPI by transferring two bits per clock cycle - reduces transaction latency. |
| Page and Sequential Modes | Enables burst transfers up to 32 bytes (page) or full 64K wraparound (sequential) - minimizes command overhead. |
| VBAT Automatic Switchover | Hardware-controlled transition to backup supply at ~1.8 V - ensures zero-interruption data retention during brownouts. |
| Pb-Free & Halogen-Free | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-609A - meets global environmental compliance requirements. |
Applications
| Smart Energy Metering | Industrial PLC Data Buffer |
|---|---|
|
Use Scenario: Storing tariff schedules, consumption logs, and event timestamps during mains power interruption. IC Role / Device Role / Timing Role: Nonvolatile SRAM buffer with automatic VBAT switchover ensures uninterrupted data capture without EEPROM wear-out or flash write delays. Use Value: Eliminates need for external backup capacitors or complex power-fail detection circuitry - reduces BOM count and board space. |
Use Scenario: Holding real-time I/O state and diagnostic history in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: High-speed SPI-accessible memory serving as fast scratchpad for cyclic process data exchange with host MCU. Use Value: 20 MHz interface enables sub-10 µs read/write cycles - critical for deterministic control loop timing in motion control applications. |
| Medical Sensor Hub | Automotive Telematics Black Box |
|
Use Scenario: Capturing patient vital sign waveforms during portable ECG or pulse oximeter operation with intermittent battery charging. IC Role / Device Role / Timing Role: Low-power serial SRAM acting as temporary waveform buffer before transmission or local storage to flash. Use Value: 4 µA standby current extends battery life between charges; SDI mode accelerates bulk waveform upload to host processor. |
Use Scenario: Recording vehicle CAN bus diagnostics, GPS position, and crash-event parameters in automotive black box recorders. IC Role / Device Role / Timing Role: Battery-backed memory preserving critical pre-crash data even after main power loss or airbag deployment. Use Value: Hardware VBAT switchover at 1.8 V ensures data integrity during rapid voltage collapse - meets ISO 16750-2 transient immunity requirements. |
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 (double density), same 20 MHz SPI/SDI interface, identical VBAT and temp specs. | Supports larger log buffers or extended configuration tables; requires no layout change but may increase cost. | Select when >512 Kbit memory depth is needed without changing interface protocol or footprint. |
| FM25V05-G | F-RAM technology (not SRAM); 512 Kbit, 40 MHz SPI, no VBAT pin - uses internal energy harvesting for data retention. | Eliminates external battery; lower write energy and infinite endurance, but lacks hardware VBAT switchover logic. | Choose for ultra-low-power, maintenance-free designs where external backup is impractical - verify timing compatibility. |
Compared with 23LCV512-E/ST, 23LC1024-I/ST offers scalable memory depth within identical packaging and interface behavior, while FM25V05-G replaces battery dependency with F-RAM's inherent nonvolatility - trading hardware backup simplicity for zero-battery system design.
Availability
23LCV512-E/ST is available at Aetrix Electronics and suitable for smart metering, industrial PLC data buffering, and medical sensor hub applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for 23LCV512-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 microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 23LCV512-E/ST belongs to Microchip's serial SRAM product line, engineered specifically for embedded systems needing reliable, low-power, battery-backed memory with SPI simplicity and SDI performance extension.
FAQ
What is the function of the VBAT pin on the 23LCV512-E/ST?
The VBAT pin on the 23LCV512-E/ST provides an external backup supply input that maintains SRAM data when main VCC drops below the 1.6–2.0 V trip threshold. When VCC falls below ~1.8 V, the device automatically switches to VBAT power - ensuring zero-interruption data retention without firmware involvement. The 23LCV512-E/ST draws only 1 µA typical from VBAT at 2.5 V, enabling multi-year operation from a CR2032 coin cell.
Does the 23LCV512-E/ST support both SPI and SDI modes simultaneously?
No, the 23LCV512-E/ST operates in either SPI mode (using SI/SO) or SDI mode (using SIO0/SIO1) - not both simultaneously. SDI mode is entered via the EDIO command (0x3B) and exited using RSTIO (0xFF). In SDI mode, two bits are transferred per clock cycle on SIO0 and SIO1, doubling effective throughput. The 23LCV512-E/ST retains its pin mapping: SIO0 = SI, SIO1 = SO, so no PCB redesign is needed to enable SDI.
What are the valid operating voltage ranges for VCC and VBAT on the 23LCV512-E/ST?
The 23LCV512-E/ST accepts VCC from 2.5 V to 5.5 V for normal operation, and VBAT from 1.4 V to 3.6 V for backup. VBAT must remain ≥1.0 V to guarantee data retention (D011), and the switchover occurs when VCC crosses the 1.6–2.0 V VTRIP window (D012). If VBAT is unused, Microchip recommends connecting it to VSS to prevent floating node issues - a requirement explicitly stated in the datasheet for reliable operation of the 23LCV512-E/ST.
How does the 23LCV512-E/ST handle address boundaries in Page and Sequential modes?
In Page mode (MODE[7:6] = 10), the 23LCV512-E/ST auto-increments the internal address pointer but wraps to the start of the same 32-byte page upon reaching the boundary - preventing cross-page writes. In Sequential mode (MODE[7:6] = 01), the pointer increments continuously across all 64K addresses and rolls over from 0xFFFF to 0x0000. This behavior is hardwired in silicon and applies identically to read and write operations - confirmed in Figures 2-3 through 2-6 of the 23LCV512-E/ST datasheet.
Is the 23LCV512-E/ST pin-compatible with other Microchip serial SRAMs like the 23LC512?
Yes, the 23LCV512-E/ST is pin-compatible with the 23LC512-I/ST and 23LC1024-I/ST in the same TSSOP-8 package (ST suffix), sharing identical pinout, voltage ranges, and SPI timing. However, the 23LCV512-E/ST adds VBAT support and SDI capability - features absent in the legacy 23LC512. Firmware using standard SPI read/write commands will operate unchanged, but SDI mode and VBAT management require updated initialization sequences specific to the 23LCV512-E/ST.
23LCV512-E/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
23LCV512-E/ST FAQ
1.How can I place an order for 23LCV512-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 23LCV512-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 23LCV512-E/ST reliable?
The price and inventory of 23LCV512-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 23LCV512-E/ST is usually 5 days.
3.What payment methods are accepted for 23LCV512-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23LCV512-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 23LCV512-E/ST?
23LCV512-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 23LCV512-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 23LCV512-E/ST?
For technical support, including 23LCV512-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23LCV512-E/ST requirements.
6.How does Aetrix verify that 23LCV512-E/ST is sourced from the original manufacturer or authorized distributors?
All 23LCV512-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 23LCV512-E/ST meets industry standards.
7.What is the process for return or replacement of 23LCV512-E/ST?
All 23LCV512-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 23LCV512-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 23LCV512-E/ST part is unused and in its original packaging.
Return procedure for 23LCV512-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
23LCV512-E/ST 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…
