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Microchip Technology 23LCV1024T-E/ST
- Part No.:
- 23LCV1024T-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
23LCV1024T-E/ST.pdf
- Description:
- IC SRAM 1MBIT SPI/DUAL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,939
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Product details
Overview
23LCV1024T-E/ST from Microchip Technology is a 1 Mbit (128K × 8) SPI-compatible serial SRAM with battery backup support, SDI dual-interface capability, and industrial temperature range (−40°C to +85°C). It operates from 2.5–5.5 V, supports 20 MHz clock rate, delivers 3 mA read current at 5.5 V/20 MHz, and features zero write time with unlimited read/write cycles - used in embedded systems requiring nonvolatile data retention during main power loss.
For engineers reviewing the 23LCV1024T-E/ST datasheet, 23LCV1024T-E/ST pinout, 23LCV1024T-E/ST application, or 23LCV1024T-E/ST equivalent, this device serves as a low-power, high-reliability serial memory solution for firmware parameter storage, real-time logging, and configuration backup in resource-constrained microcontroller systems.
Technical Context
The 23LCV1024T-E/ST implements a true SPI interface with separate SI/SO lines and supports SDI (Serial Dual Interface) mode via SIO0/SIO1 pins for higher throughput. Its internal MODE register configures byte, page (32-byte), or sequential operation modes, enabling flexible access patterns without external address latching.
It integrates an automatic VCC/VBAT switchover circuit with 1.6–2.0 V trip point (typ. 1.8 V), maintaining RAM data integrity when main supply drops below VTRIP. The device powers on in standby mode (4 µA at +85°C) and requires CS low-to-high transition to initiate active communication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Mbit (128K × 8), organized as 4096 pages of 32 bytes - enables efficient burst writes within page boundaries without wraparound overhead |
| Interface | SPI-compatible with SDI dual-I/O mode - supports standard single-bit SPI and faster dual-bit transfers using SIO0/SIO1 pins |
| Max clock frequency | 20 MHz - allows up to 2.5 MB/s raw throughput in SPI mode, critical for high-speed logging applications |
| VCC operating range | 2.5–5.5 V - compatible with both 3.3 V and 5 V microcontroller I/O domains without level shifting |
| VBAT retention voltage | 1.4–3.6 V with 1.0 V minimum data retention - permits use of common coin cells (e.g., CR2032) for long-term backup |
| Read/standby current | 3 mA at 5.5 V/20 MHz; 4 µA at +85°C - enables ultra-low-power operation in battery-backed sleep states |
| Operating temperature | −40°C to +85°C (Industrial grade) - validated for deployment in automotive body control modules and industrial HMIs |
Pinout & Package
23LCV1024T-E/ST is housed in an 8-lead TSSOP package (4.4 mm body width), RoHS-compliant and halogen-free, with standard JEDEC footprint and thermal profile suitable for reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select Input | Active-low enable signal; forces device into high-impedance standby when high, allowing multi-device SPI bus sharing |
| SIO1/SO (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 - no electrical function |
| VSS (Pin 4) | Ground Reference | Primary digital ground return path; requires low-inductance connection to system GND plane |
| SIO0/SI (Pin 5) | Serial Input / SDI Data Line 0 | Accepts instructions, addresses, and data in SPI mode; serves as first bidirectional data line in SDI mode |
| SCK (Pin 6) | Serial Clock Input | Master-generated clock synchronizing all data transfers; rising edge latches input, falling edge updates output |
| VBAT (Pin 7) | External Backup Supply | Provides hold power when VCC < VTRIP (1.6–2.0 V); draws only 1 µA typical - extends coin cell life beyond 10 years |
| VCC (Pin 8) | Primary Power Supply | Core logic and memory array supply; decoupling capacitor (0.1 µF) required within 5 mm of pin per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Unlimited read/write endurance | Guaranteed infinite cycles - eliminates wear-leveling firmware overhead in logging and configuration storage |
| Zero write time | No write cycle delay; data committed immediately upon CS deassertion - enables deterministic real-time data capture |
| SDI dual-interface support | EDIO/RSTIO command-controlled mode switching - doubles effective throughput vs. standard SPI without hardware redesign |
| Automatic VCC/VBAT switchover | Hardware-managed transition at 1.8 V typ. - ensures seamless RAM retention during brownout or hot-swap events |
| Page and sequential access modes | Configurable via MODE register (0x01/0x05) - optimizes bandwidth utilization for burst writes or full-array streaming |
Applications
| Industrial Data Logger | Automotive Body Control Module |
|---|---|
Use Scenario: Continuous recording of sensor readings (temperature, pressure, voltage) with timestamped entries during mains power interruption. IC Role / Device Role / Timing Role: Nonvolatile SRAM buffer holding last 10–15 minutes of data; retains content via VBAT during AC failure. Use Value: Eliminates need for EEPROM wear leveling or flash emulation, reducing firmware complexity and ensuring sub-millisecond write latency. |
Use Scenario: Storing door lock status, mirror position, seat memory, and lighting presets across ignition cycles. IC Role / Device Role / Timing Role: Battery-backed configuration store interfacing directly with PIC MCU SPI port; powered by vehicle's always-on 12 V rail via LDO. Use Value: Supports instant recall of user settings after battery disconnect; VTRIP threshold ensures retention even during cranking voltage sag. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Capturing therapy delivery history, alarm logs, and calibration parameters with tamper-proof timestamping. IC Role / Device Role / Timing Role: Critical runtime memory holding dose counters and error flags; backed by CR2032 coin cell via VBAT pin. Use Value: Meets IEC 62304 Class C software requirements for data integrity; 1 µA VBAT current enables >10-year backup life. |
Use Scenario: Maintaining tariff schedules, demand response commands, and metering registers during grid outages. IC Role / Device Role / Timing Role: High-reliability serial memory storing billing-critical data; interfaces with metrology SoC via SPI at 10 MHz. Use Value: Unlimited endurance prevents field failures from frequent TOU schedule updates; industrial temp rating ensures outdoor enclosure operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY14V101QS-SXIT | 1 Mbit nvSRAM with integrated lithium battery; no external VBAT required; 44-pin SOIC package | Higher integration but larger footprint and fixed 3.3 V only operation; no SDI mode | Select when board space permits larger package and integrated backup is preferred over discrete coin cell flexibility |
| FM25V01A-G | 1 Mbit F-RAM with 15 ns write time; 2.7–3.6 V operation; 8-pin SOIC/TSSOP; no VBAT pin | Superior write endurance and speed, but lacks battery backup - requires external supercap or backup regulator | Select when ultra-fast writes dominate requirements and backup power can be implemented externally |
Compared with CY14V101QS-SXIT and FM25V01A-G, the 23LCV1024T-E/ST offers unique SDI interface acceleration, wide 2.5–5.5 V compatibility, and user-configurable VBAT sourcing - making it optimal for cost-sensitive, mixed-voltage designs needing flexible backup architecture.
Availability
23LCV1024T-E/ST is available at Aetrix Electronics and suitable for industrial data loggers, automotive body control modules, and medical infusion pumps requiring stable component supply across extended production lifecycles.
Supply support for 23LCV1024T-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, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 23LCV1024T-E/ST belongs to Microchip's serial SRAM product line, designed specifically for embedded systems needing fast, reliable, low-power nonvolatile memory with flexible backup options and direct SPI microcontroller interoperability.
FAQ
What is the VTRIP voltage specification for 23LCV1024T-E/ST, and how does it affect backup operation?
The 23LCV1024T-E/ST has a VTRIP specification of 1.6–2.0 V (typ. 1.8 V), defining the threshold at which the internal switch transitions from VCC to VBAT power. When VCC falls below VTRIP, the device automatically switches to VBAT to preserve RAM contents. This ensures uninterrupted data retention during brownouts or main supply removal, provided VBAT remains ≥1.4 V. The 23LCV1024T-E/ST maintains data down to 1.0 V on VBAT.
Does 23LCV1024T-E/ST support both SPI and SDI modes simultaneously?
No, the 23LCV1024T-E/ST operates in either SPI mode (using SI/SO) or SDI mode (using SIO0/SIO1) - not both at once. Mode selection is controlled by issuing the EDIO (0x3B) command to enter SDI mode or RSTIO (0xFF) to return to SPI mode. The device retains its selected mode until explicitly changed, and mode state persists across VCC power cycles if VBAT remains active.
What is the maximum supported clock frequency for 23LCV1024T-E/ST in SDI mode?
The 23LCV1024T-E/ST supports up to 20 MHz clock frequency in both SPI and SDI modes. In SDI mode, two bits are transferred per clock cycle (MSB first on SIO1, LSB on SIO0), effectively doubling data throughput versus SPI mode at the same clock rate - achieving up to 5 MB/s effective bandwidth. AC timing parameters (e.g., TCSS, Tsu) remain identical between modes per DS25156A.
How is page addressing implemented in 23LCV1024T-E/ST, and what happens at page boundaries?
The 23LCV1024T-E/ST organizes memory into 4096 pages of 32 bytes each. In Page mode (MODE[7:6] = 10b), the internal address counter increments automatically but wraps to the start of the same page upon reaching the 32nd byte - preventing accidental cross-page writes. This ensures atomic 32-byte updates without software address management. Sequential mode (01b) disables page wrapping, allowing continuous access across the full 128K address space.
Can 23LCV1024T-E/ST be used without connecting the VBAT pin?
Yes, the VBAT pin may be left unconnected or tied to VSS if battery backup is not required. Per Microchip's recommendation, grounding VBAT avoids floating node issues and ensures predictable behavior. In that configuration, the device operates solely from VCC and loses all RAM data when VCC drops below 1.0 V. All other functionality - SPI/SDI interface, read/write cycles, and mode registers - remains fully operational.
23LCV1024T-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:
- 1Mbit
- Memory Organization:
- 128K 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
23LCV1024T-E/ST FAQ
1.How can I place an order for 23LCV1024T-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 23LCV1024T-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 23LCV1024T-E/ST reliable?
The price and inventory of 23LCV1024T-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 23LCV1024T-E/ST is usually 5 days.
3.What payment methods are accepted for 23LCV1024T-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23LCV1024T-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 23LCV1024T-E/ST?
23LCV1024T-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 23LCV1024T-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 23LCV1024T-E/ST?
For technical support, including 23LCV1024T-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23LCV1024T-E/ST requirements.
6.How does Aetrix verify that 23LCV1024T-E/ST is sourced from the original manufacturer or authorized distributors?
All 23LCV1024T-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 23LCV1024T-E/ST meets industry standards.
7.What is the process for return or replacement of 23LCV1024T-E/ST?
All 23LCV1024T-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 23LCV1024T-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 23LCV1024T-E/ST part is unused and in its original packaging.
Return procedure for 23LCV1024T-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
23LCV1024T-E/ST Tags
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