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Microchip Technology 23LCV04M-I/ST
- Part No.:
- 23LCV04M-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
23LCV04M-I/ST.pdf
- Description:
- IC SRAM 4MBIT SPI/QUAD 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,668
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Product details
Overview
23LCV04M-I/ST from Microchip Technology is a 4,096-Kbit serial SRAM with external battery backup support, SPI/SDI/SQI interface compatibility (modes 0 and 3), 143 MHz max clock frequency, and built-in ECC logic. It operates from 2.2V to 3.6V across -40°C to +85°C and enables non-volatile data retention via VBAT during main power loss in industrial control and telemetry systems.
For engineers reviewing the 23LCV04M-I/ST datasheet, 23LCV04M-I/ST pinout, 23LCV04M-I/ST application, or 23LCV04M-I/ST equivalent, this page delivers verified electrical specs, validated 14-lead TSSOP package mapping, confirmed VBAT switchover behavior at 1.75–1.95 V, and real-world timing constraints for high-speed read (0x0B) at 143 MHz.
Technical Context
The 23LCV04M-I/ST implements a tri-mode serial interface: SPI (separate SI/SO), SDI (dual I/O on SIO0/SIO1), and SQI (quad I/O on SIO0–SIO3), all supporting mode 0 and mode 3 clock polarity/idle states. Its internal address counter supports byte, page (32/256-byte selectable), and sequential read/write operations without wrap-around restrictions beyond array boundaries.
Power management includes automatic VBAT switchover when VCC drops below VTRIP (1.75–1.95 V), retaining both SRAM contents and STATUS register settings. The device features programmable output drive strength (8 levels), slew rate (4 settings), and ECC-enabled error detection-latching ECS=1 only when correction was applied during the prior read.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,096 Kbit (512 KB) organized as 256 × 8-bit pages |
| Supply Voltage Range | 2.2 V to 3.6 V - defines minimum system rail stability for reliable operation |
| Max Clock Frequency | 143 MHz - enables high-speed read (0x0B) with dummy cycle, doubling throughput vs. standard 40 MHz READ (0x03) |
| VBAT Switchover Threshold | 1.75–1.95 V - ensures seamless transition to backup supply before data loss |
| Standby Current | 140 µA typical @ 25°C - supports ultra-low-power sleep modes in battery-backed systems |
| ECC Support | Built-in logic detects/corrects single-bit errors - latches status in ECS bit of STATUS register |
| Temperature Range | -40°C to +85°C (Industrial) - qualified for harsh environments without derating |
Pinout & Package
23LCV04M-I/ST is packaged exclusively in 14-lead TSSOP (ST suffix), with pins 5–9 and 10 designated as NC (no connect) and pin 10 assigned to VBAT. This package supports surface-mount assembly and thermal performance suitable for industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select Input | Active-low enable; forces SO to high-Z when deasserted, enabling multi-device SPI bus sharing |
| 2 (SO/SIO1) | Serial Output / Dual/Quad I/O | Tri-state output in SPI mode; bidirectional in SDI/SQI - used for data out (falling SCK edge) and data in (rising SCK edge) |
| 3 (SIO2) | Quad I/O Pin | Active only in SQI mode; bidirectional data lane for 4-bit parallel transfers |
| 4 (VSS) | Ground Reference | Primary return path for all digital and analog circuitry; must be low-impedance connection |
| 11 (SI/SIO0) | Serial Input / Dual/Quad I/O | Latches command/address/data on rising SCK edge in SPI; bidirectional in SDI/SQI |
| 12 (SCK) | Serial Clock Input | Synchronizes all data transfers; supports mode 0 (low idle) and mode 3 (high idle) |
| 13 (HOLD/SIO3) | Hold Control / Quad I/O | Pauses ongoing transfers in SPI/SDI mode; becomes active I/O pin in SQI mode |
| 14 (VCC) | Power Supply | 2.2–3.6 V main supply; powers core logic, interface, and ECC engine |
| 10 (VBAT) | External Backup Supply | Accepts 1.4–3.6 V battery input; automatically engages when VCC falls below VTRIP |
Key Features
| Feature | Design Value |
|---|---|
| Triple-interface architecture | Hardware-selectable SPI/SDI/SQI modes - eliminates need for external multiplexers while scaling bandwidth 1×/2×/4× at same clock rate |
| Programmable page size | User-configurable 32-byte or 256-byte pages via STATUS register bit 8 - optimizes burst efficiency for small metadata vs. large buffers |
| Configurable output drivers | 8 drive strength levels (12.5–100%) and 4 slew rates (1.44–6.00 V/ns) - reduces EMI and signal integrity issues on long traces |
| Automatic VBAT switchover | Seamless transition at 1.75–1.95 V without host intervention - preserves RAM and STATUS register state during brownout |
| Unlimited endurance | No write-cycle limitation - supports continuous logging, buffer rotation, and firmware update staging without wear leveling |
Applications
| Industrial Data Logger | Medical Sensor Hub |
|---|---|
Use Scenario: Continuous acquisition of temperature, pressure, and flow sensor data in remote field units with intermittent power. IC Role / Device Role / Timing Role: Non-volatile SRAM buffer holding up to 512 KB of timestamped readings; VBAT maintains data during grid outage or battery swap. Use Value: Eliminates need for EEPROM wear leveling or flash programming delays - enables microsecond write latency and true infinite endurance. |
Use Scenario: Real-time aggregation of ECG, SpO₂, and respiration signals in portable diagnostic devices with dual-power sources. IC Role / Device Role / Timing Role: High-speed memory buffer interfacing with MCU via SQI at 143 MHz, synchronized to ADC sampling clocks. Use Value: Reduces data transfer time by 75% vs. SPI, freeing CPU cycles for real-time signal processing and wireless transmission. |
| Smart Energy Meter | Automotive Telematics Unit |
Use Scenario: Storing tariff schedules, consumption history, and tamper logs in utility-grade meters operating 20+ years in outdoor enclosures. IC Role / Device Role / Timing Role: Industrial-temp SRAM with ECC protection storing critical billing data; powered by supercapacitor backup during mains failure. Use Value: ECC prevents silent corruption of revenue-critical data; VBAT retention extends to 10+ years at +85°C with lithium thionyl chloride cells. |
Use Scenario: Caching GPS position, CAN bus diagnostics, and driver behavior metrics in ADAS black-box recorders with crash-triggered save. IC Role / Device Role / Timing Role: Low-latency write buffer accepting burst writes from multiple sensors; HOLD pin suspends transfers during airbag deployment interrupt. Use Value: HOLD functionality guarantees atomic save of pre-crash state without software overhead or risk of partial writes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 23AA04M-I/ST | 8-lead SOIC/TSSOP; 1.7–3.6 V supply; no VBAT pin | Lower-cost option where battery backup is unnecessary and board space permits smaller package | Select when VBAT is not required and 8-lead footprint aligns with legacy layout |
| FM25V05-G | F-RAM technology; 2.0–3.6 V; 4-Mbit density; no ECC; 10¹⁴ write cycles | Eliminates write delay and write endurance concerns but lacks VBAT switchover and ECC | Prefer for ultra-high-write-frequency logging where deterministic sub-μs writes outweigh ECC needs |
Compared with 23AA04M-I/ST, the 23LCV04M-I/ST adds VBAT retention and ECC at the cost of 14-lead packaging; versus FM25V05-G, it trades F-RAM's instant writes for robust error correction and guaranteed data holdover during extended power loss.
Availability
23LCV04M-I/ST is available at Aetrix Electronics and suitable for industrial data loggers, medical sensor hubs, smart energy meters, automotive telematics units, and portable instrumentation requiring stable component supply over extended product lifecycles.
Supply support for 23LCV04M-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 is a global semiconductor company specializing in microcontrollers, analog components, and memory solutions for industrial, automotive, and communications markets.
The 23LCV04M belongs to Microchip's serial SRAM product line, designed specifically for battery-backed, high-reliability data buffering in systems where data integrity and power-fail resilience are critical.
FAQ
What is the VBAT voltage range and switchover behavior for the 23LCV04M-I/ST?
The 23LCV04M-I/ST accepts VBAT input from 1.4 V to 3.6 V. Automatic switchover occurs when VCC falls within the 1.75–1.95 V window (VTRIP), preserving both SRAM contents and STATUS register configuration. Upon VCC restoration, the device auto-disconnects VBAT and resumes normal operation without host intervention.
Does the 23LCV04M-I/ST support quad-SPI (QSPI) mode, and how is it enabled?
Yes, the 23LCV04M-I/ST supports Serial Quad Interface (SQI) mode using pins SIO0–SIO3. It is enabled via the EQIO command (0x38); the device defaults to SPI mode after power-on reset for backward compatibility. SQI mode quadruples effective throughput at the same clock frequency compared to standard SPI.
How does the built-in ECC function in the 23LCV04M-I/ST, and how is it monitored?
The 23LCV04M-I/ST applies on-chip ECC logic during every read operation. If single-bit correction is performed, the Error Correction State (ECS) bit (bit 13) in the STATUS register is set to '1'. This latch persists until the next read that does not require correction or a power-on reset occurs.
What package type is used for the 23LCV04M-I/ST, and are all 14 leads functional?
The 23LCV04M-I/ST uses a 14-lead TSSOP package (ST suffix). Pins 1–4 and 11–14 are functional (CS, SO/SIO1, SIO2, VSS, SI/SIO0, SCK, HOLD/SIO3, VCC, VBAT); pins 5–9 are NC (no connect). This 14-lead variant is exclusive to the 23LCV04M family.
Can the 23LCV04M-I/ST operate at 143 MHz in all interface modes, and what instruction is required?
Yes, the 23LCV04M-I/ST supports 143 MHz clocking in SPI, SDI, and SQI modes, but only with the High-Speed Read instruction (0x0B), which requires one dummy byte. Standard READ (0x03) is limited to 40 MHz regardless of interface mode.
23LCV04M-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- -
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Synchronous
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 143 MHz
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 7 ns
- Voltage - Supply:
- 2.2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
23LCV04M-I/ST FAQ
1.How can I place an order for 23LCV04M-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 23LCV04M-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 23LCV04M-I/ST reliable?
The price and inventory of 23LCV04M-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 23LCV04M-I/ST is usually 5 days.
3.What payment methods are accepted for 23LCV04M-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23LCV04M-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 23LCV04M-I/ST?
23LCV04M-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 23LCV04M-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 23LCV04M-I/ST?
For technical support, including 23LCV04M-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23LCV04M-I/ST requirements.
6.How does Aetrix verify that 23LCV04M-I/ST is sourced from the original manufacturer or authorized distributors?
All 23LCV04M-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 23LCV04M-I/ST meets industry standards.
7.What is the process for return or replacement of 23LCV04M-I/ST?
All 23LCV04M-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 23LCV04M-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 23LCV04M-I/ST part is unused and in its original packaging.
Return procedure for 23LCV04M-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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