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Microchip Technology 23LC512T-E/ST
- Part No.:
- 23LC512T-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
23LC512T-E/ST.pdf
- Description:
- IC SRAM 512KBIT SPI/QUAD 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,170
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Product details
Overview
23LC512T-E/ST from Microchip Technology is a 512-Kbit serial SRAM with SPI/SDI/SQI interface, 2.5V–5.5V supply, 20 MHz max clock (16 MHz at extended temp), 64K × 8-bit organization, and 32-byte page size. It serves as nonvolatile-adjacent fast-access memory in microcontroller-based data logging systems requiring zero write time and unlimited endurance.
For engineers reviewing the 23LC512T-E/ST datasheet, 23LC512T-E/ST pinout, 23LC512T-E/ST application, or 23LC512T-E/ST equivalent, key selection criteria include VCC range compatibility (2.5–5.5 V), industrial/extended temperature support (−40°C to +125°C), SDI/SQI mode enablement, standby current ≤4 µA at +85°C, and TSSOP-8 package footprint constraints.
Technical Context
The 23LC512T-E/ST implements a synchronous serial interface supporting three operational modes-Byte, Page, and Sequential-controlled via a writable MODE register. Its dual- and quad-I/O capability (via EDIO/EQIO commands) enables higher throughput than standard SPI while maintaining backward compatibility.
It features dedicated HOLD functionality for transaction suspension without sequence reset, active only in SPI/SDI modes (disabled in SQI). The device powers on in Standby mode (CS = high), requires CS low-to-high transition to initiate operation, and retains RAM data down to 1.0 V VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8-bit); supports byte/page/sequential access with automatic address wraparound |
| Interface Modes | SPI (single I/O), SDI (dual I/O), SQI (quad I/O); mode selected via command (EDIO/EQIO/RSTIO) |
| Max Clock Frequency | 20 MHz at I-temp (−40°C to +85°C); 16 MHz at E-temp (−40°C to +125°C) |
| Supply Voltage | 2.5 V to 5.5 V; supports direct interfacing with 3.3 V and 5 V microcontrollers |
| Standby Current | ≤4 µA at VCC = 5.5 V, TA = +85°C; enables ultra-low-power battery-backed operation |
| Data Retention Voltage | 1.0 V minimum VCC to retain RAM contents; critical for brown-out resilience |
| Endurance & Retention | Unlimited read/write cycles; data retention >20 years at +85°C (per spec) |
Pinout & Package
23LC512T-E/ST is packaged in an 8-lead TSSOP (Thin Shrink Small Outline Package) with 0.65 mm pitch, 3.0 mm × 4.4 mm body, and RoHS-compliant matte tin finish. Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low enable; forces device into Standby (high-Z SO) when deasserted |
| SO/SIO1 | Serial Output / SDI/SQI Data Line | Tri-state output in SPI mode; bidirectional in SDI/SQI; requires external pull-up in shared-bus systems |
| SIO2 | SQI Data Line | Used only in SQI mode; must not float in SPI/SDI; no function in Byte/Page/Sequential SPI reads/writes |
| VSS | Ground Reference | Primary return path for all I/O and core logic; must be low-impedance and decoupled near VCC pin |
| SI/SIO0 | Serial Input / SDI/SQI Data Line | Input-only in SPI; bidirectional in SDI/SQI; latches data on SCK rising edge |
| SCK | Serial Clock Input | Synchronizes all transfers; rising edge clocks SI, falling edge updates SO; max 20 MHz rate |
| HOLD/SIO3 | Hold Control / SQI Data Line | Suspends ongoing transfer without resetting internal address pointer; disabled in SQI mode |
| VCC | Power Supply | 2.5–5.5 V core and I/O supply; requires 100 nF ceramic decoupling capacitor placed ≤2 mm from pin |
Key Features
| Feature | Design Value |
|---|---|
| Zero Write Time | Eliminates wait states during write operations-data is stored immediately upon CS high assertion |
| Unlimited Endurance | Supports continuous logging or buffering in telemetry gateways without wear-out concerns |
| Multi-Mode Interface | Enables bandwidth scaling: SPI (1-bit), SDI (2-bit), or SQI (4-bit) per clock cycle based on host capability |
| Page-Oriented Writes | 32-byte page boundary enforcement prevents accidental overwrites during burst writes |
| HOLD Functionality | Allows real-time interrupt servicing without losing SPI state-critical in deterministic RTOS environments |
Applications
| Industrial Data Logger | Automotive Telematics Unit |
|---|---|
Use Scenario: Continuous sensor sampling (temperature, pressure, voltage) at 100 Hz with timestamping and local buffering before CAN upload. IC Role / Device Role / Timing Role: High-speed, low-latency SRAM buffer between ADC controller and host MCU; handles burst writes without CPU intervention. Use Value: Zero write time and 20 MHz interface enable full 100 Hz sample capture across 64K addresses; 4 µA standby extends battery life in disconnected mode. | Use Scenario: Storing GPS position snapshots, OBD-II fault codes, and vehicle event logs during ignition-off periods. IC Role / Device Role / Timing Role: Nonvolatile-adjacent scratchpad memory holding last-known-good state and recent diagnostics prior to EEPROM commit. Use Value: 1.0 V data retention voltage ensures log integrity during cold cranking (battery dip to ~1.2 V); E-temp rating guarantees operation up to +125°C under hood. |
| Medical Wearable Sensor Hub | Smart Energy Meter |
Use Scenario: Aggregating raw PPG, accelerometer, and SpO₂ streams from multiple sensors before Bluetooth LE transmission. IC Role / Device Role / Timing Role: Low-power intermediate buffer enabling duty-cycled MCU operation-wakes only to offload accumulated data. Use Value: 4 µA standby current at +85°C allows multi-week operation on coin cell; sequential read mode simplifies firmware streaming logic. | Use Scenario: Capturing 15-minute interval kWh consumption, voltage harmonics, and tamper events for utility reporting. IC Role / Device Role / Timing Role: High-reliability temporary storage bridging metering IC and secure MCU, surviving power loss during grid fluctuations. Use Value: Unlimited write cycles eliminate concern over daily 96-write cycles over 10+ year field life; TSSOP-8 footprint fits constrained PCB space. |
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 density (128K × 8), same VCC range, package, and interface; 20/16 MHz speed grade | Higher memory capacity required for longer buffer depth or multi-channel logging | Select when >512 Kbit buffer space is needed without changing layout or firmware driver architecture |
| FM25V05-G | F-RAM technology; 512 Kbit, 2.7–3.6 V VCC, SPI-only (no SDI/SQI), 40 MHz max clock, 150 µA active current | Lower active power not critical; need faster random writes and true nonvolatility without backup cap | Choose for true nonvolatile storage without external energy storage; accept narrower VCC range and no quad-I/O |
Compared with 23LC1024T-E/ST, the 23LC512T-E/ST offers smaller footprint and lower active current at 5.5 V; versus FM25V05-G, it provides wider VCC compatibility and higher-speed quad-I/O but requires external backup for data retention during power loss.
Availability
23LC512T-E/ST is available at Aetrix Electronics and suitable for industrial data loggers, automotive telematics units, medical wearable sensor hubs, and smart energy meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 23LC512T-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 high-reliability silicon and development tools.
The 23LC512T-E/ST belongs to Microchip's serial SRAM product line, designed specifically for microcontroller co-processing applications demanding fast, low-power, and highly reliable external memory with flexible interface options.
FAQ
What is the operating temperature range for the 23LC512T-E/ST?
The 23LC512T-E/ST is rated for the extended temperature range of −40°C to +125°C, making it suitable for under-hood automotive, industrial control, and outdoor metering applications where ambient thermal stress exceeds standard industrial limits. This rating is confirmed in the Device Selection Table and AC Characteristics section of DS20005155C.
Does the 23LC512T-E/ST support quad-SPI (QSPI) mode?
Yes, the 23LC512T-E/ST supports Serial Quad Interface (SQI) mode via the EQIO command, enabling four-bit-per-clock data transfer. However, SQI mode disables the HOLD function and requires use of SIO0–SIO3 pins; pin configuration differs from standard SPI mode per Figure 3-3 in DS20005155C.
What is the maximum clock frequency supported by the 23LC512T-E/ST at +125°C?
At the extended temperature range (−40°C to +125°C), the 23LC512T-E/ST supports a maximum clock frequency of 16 MHz, as specified in Table 1-2 (AC Characteristics) and the Device Selection Table footnote. This is reduced from 20 MHz at industrial temperature (−40°C to +85°C).
Can the 23LC512T-E/ST retain data during power loss?
The 23LC512T-E/ST retains RAM data down to a minimum VCC of 1.0 V (D011 parameter), but it is volatile memory and requires continuous power for retention. For true nonvolatile storage, external backup (e.g., supercapacitor or battery) or companion nonvolatile memory (e.g., EEPROM or FRAM) is necessary.
Is the 23LC512T-E/ST pin-compatible with the 23A512 series?
No-the 23LC512T-E/ST operates at 2.5–5.5 V, while the 23A512 series requires 1.7–2.2 V. Though both share identical pinout and instruction set, their VCC ranges are mutually exclusive; interchanging them risks overvoltage damage to the 23A512 or insufficient drive strength for the 23LC512T-E/ST.
23LC512T-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:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM
- Memory Size:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 16 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
23LC512T-E/ST FAQ
1.How can I place an order for 23LC512T-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 23LC512T-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 23LC512T-E/ST reliable?
The price and inventory of 23LC512T-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 23LC512T-E/ST is usually 5 days.
3.What payment methods are accepted for 23LC512T-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23LC512T-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 23LC512T-E/ST?
23LC512T-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 23LC512T-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 23LC512T-E/ST?
For technical support, including 23LC512T-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23LC512T-E/ST requirements.
6.How does Aetrix verify that 23LC512T-E/ST is sourced from the original manufacturer or authorized distributors?
All 23LC512T-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 23LC512T-E/ST meets industry standards.
7.What is the process for return or replacement of 23LC512T-E/ST?
All 23LC512T-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 23LC512T-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 23LC512T-E/ST part is unused and in its original packaging.
Return procedure for 23LC512T-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
23LC512T-E/ST Tags
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