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Microchip Technology 23LC512T-E/SN
- Part No.:
- 23LC512T-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
23LC512T-E/SN.pdf
- Description:
- IC SRAM 512KBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,129
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Product details
Overview
23LC512T-E/SN from Microchip Technology is a 512-Kbit serial SRAM with SPI/SDI/SQI interface, operating at up to 20 MHz clock rate over 2.5V–5.5V supply. It delivers 3 mA read current at 5.5V/20 MHz, 4 µA standby current at +85°C, and supports byte/page/sequential access modes in an 8-lead SOIC (SN) package. It is used in microcontroller-based data buffering where fast non-volatile-like access and low-power standby are required.
For engineers reviewing the 23LC512T-E/SN datasheet, 23LC512T-E/SN pinout, 23LC512T-E/SN application, or 23LC512T-E/SN equivalent, key selection considerations include VCC range (2.5–5.5 V), industrial/extended temperature support (–40°C to +125°C), SDI/SQI mode compatibility, HOLD functionality availability (SPI/SDI only), and 32-byte page size for burst writes.
Technical Context
The 23LC512T-E/SN implements a serial SRAM architecture with three configurable access modes-Byte, Page, and Sequential-controlled via a writable MODE register. Its SPI-compatible bus supports standard single-I/O operation plus optional Serial Dual Interface (SDI) and Serial Quad Interface (SQI), with dedicated SIO0–SIO3 pins enabling 2-bit or 4-bit per clock transfers.
It features active HOLD functionality during SPI/SDI operation (suspended via HOLD/SIO3 pin), automatic address incrementing within pages or across the full 64K × 8-bit array, and zero write time with unlimited read/write cycles. SQI mode disables HOLD and requires RSTIO command to revert to SPI mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8-bit organization), enabling 65,536 bytes of fast volatile storage for real-time data buffering. |
| Interface Modes | SPI (single I/O), SDI (dual I/O), SQI (quad I/O); mode selected via EDIO/EQIO commands - enables scalable bandwidth from 20 Mbps to 80 Mbps. |
| Max Clock Frequency | 20 MHz (industrial temp), 16 MHz (extended temp); defines maximum sustained data throughput in SPI mode. |
| Supply Voltage | 2.5 V to 5.5 V; compatible with 3.3 V and 5 V microcontroller I/O domains without level shifting. |
| Standby Current | 4 µA at +85°C; ensures ultra-low power retention in battery-backed or energy-constrained systems. |
| Page Size | 32 bytes; determines maximum contiguous write length before wraparound or page boundary handling is required. |
| Data Retention Voltage | 1.0 V minimum; guarantees RAM contents remain valid during brown-out or controlled power-down sequences. |
Pinout & Package
23LC512T-E/SN is housed in an 8-lead narrow SOIC (SN) package, 3.90 mm body width, JEDEC-compliant, RoHS-compliant matte tin finish. Pin 1 is marked with a notch or dot; pin numbering follows standard SOIC convention (counterclockwise from top-left).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low enable; places device in standby (SO high-Z) when high; required low pulse to initiate any operation. |
| SO/SIO1 | Serial Output / SDI/SQI Data Line | Tri-state output in SPI mode; shares function with SIO1 in SDI/SQI; outputs data on SCK falling edge. |
| SIO2 | SQI Data Line | Valid only in SQI mode; carries nibble-level data (bit 2–3) synchronized to SCK; unused in SPI/SDI. |
| VSS | Ground Reference | Primary return path for all internal circuitry and I/O; must be low-impedance connection to system GND plane. |
| SI/SIO0 | Serial Input / SDI/SQI Data Line | Input for instructions, addresses, and data in SPI mode; shares function with SIO0; latched on SCK rising edge. |
| SCK | Serial Clock Input | Master-synchronized timing reference; rising edge latches input, falling edge updates output; max 20 MHz. |
| HOLD/SIO3 | Hold Control / SQI Data Line | In SPI/SDI: suspends ongoing transfer without resetting state; in SQI: functions as fourth data line (bit 6–7). |
| VCC | Power Supply | 2.5–5.5 V supply input; powers core logic and I/O buffers; decoupling capacitor (0.1 µF) required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Unlimited Read/Write Cycles | Enables continuous runtime logging or buffer rotation without wear-out concerns - no endurance limits unlike flash or EEPROM. |
| Zero Write Time | Eliminates write latency overhead; data written on final clock edge of instruction sequence - no wait states or polling required. |
| Multi-Mode Access (Byte/Page/Sequential) | Allows optimization: Byte for random access, Page for burst writes within 32-byte boundaries, Sequential for full-array streaming. |
| SDI/SQI High-Speed Extensions | Doubles (SDI) or quadruples (SQI) effective throughput vs. standard SPI - critical for high-bandwidth sensor or display interfaces. |
| HOLD Function (SPI/SDI Only) | Permits host MCU to pause ongoing transfers (e.g., during interrupt servicing) and resume from exact point - preserves address pointer state. |
Applications
| Industrial Data Logger | Medical Sensor Hub |
|---|---|
Use Scenario: Continuous acquisition of analog sensor readings (temperature, pressure) at 1 kHz, buffered before periodic USB/UART upload. IC Role / Device Role / Timing Role: Volatile high-speed buffer between ADC controller and host processor; absorbs burst sampling without CPU intervention. Use Value: 32-byte page writes align with typical sensor packet sizes; 20 MHz SPI sustains >2 MB/s peak throughput; 4 µA standby extends battery life between uploads. |
Use Scenario: Real-time ECG waveform capture in portable diagnostic device, requiring lossless short-term storage prior to Bluetooth transmission. IC Role / Device Role / Timing Role: Low-latency memory sink for DMA-driven ADC streams; supports sequential readout aligned to BLE packet boundaries. Use Value: Zero write time prevents sample drop during BLE radio activity; 1.0 V data retention allows graceful shutdown during low-battery events. |
| Automotive Telematics Module | POS Terminal Transaction Cache |
Use Scenario: Storing GPS position snapshots and CAN bus event logs during vehicle ignition cycles, surviving cold cranking voltage dips. IC Role / Device Role / Timing Role: Fault-tolerant temporary storage with brown-out resilience; retains data down to 1.0 V while main MCU resets. Use Value: Extended temperature rating (–40°C to +125°C) matches under-hood environments; RoHS-compliant SN package suits automotive reflow profiles. |
Use Scenario: Caching credit card transaction records locally during intermittent cellular connectivity outages in retail terminals. IC Role / Device Role / Timing Role: Reliable intermediate store for ACID-compliant financial data before secure cloud sync; accessed via PIC MCU SPI port. Use Value: Unlimited write cycles eliminate wear management firmware; HOLD function preserves partial transactions during power fail detection interrupts. |
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/SN | 1 Mbit capacity (128K × 8), same 2.5–5.5 V VCC, identical SOIC-8 package and pinout; otherwise functionally identical. | Required when >64 KB buffer depth is needed - e.g., longer audio buffering or multi-sensor fusion windows. | Select 23LC1024T-E/SN only if memory density is insufficient; no layout or firmware changes needed beyond address width extension. |
| FM25V05-G | F-RAM technology (not SRAM); 512 Kbit, 2.7–3.6 V VCC only; 100-year data retention; 15 MHz max SPI clock; different command set. | Better suited for infrequent-write, long-retention use cases (e.g., configuration storage) - not for high-throughput buffering. | Choose FM25V05-G only if true non-volatility and extreme write endurance (>10¹⁴ cycles) outweigh speed and voltage flexibility trade-offs. |
Compared with 23LC1024T-E/SN, the 23LC512T-E/SN offers lower density but identical timing, power, and interface behavior - ideal for cost-optimized or space-constrained designs. Against FM25V05-G, it provides higher speed, wider VCC range, and simpler command protocol - better for dynamic data flow rather than persistent state storage.
Availability
23LC512T-E/SN is available at Aetrix Electronics and suitable for industrial data loggers, medical sensor hubs, and automotive telematics modules requiring stable component supply, extended temperature operation, and RoHS-compliant packaging.
Supply support for 23LC512T-E/SN 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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 23LC512T-E/SN belongs to Microchip's serial SRAM product line, designed specifically for microcontroller systems needing fast, low-power, pin-efficient volatile memory with flexible interface options beyond standard SPI.
FAQ
What is the operating temperature range for the 23LC512T-E/SN?
The 23LC512T-E/SN is rated for extended temperature operation from –40°C to +125°C, as indicated by the "E" suffix in the part number. This makes it suitable for under-hood automotive, industrial control, and outdoor equipment applications where ambient thermal stress exceeds standard industrial limits.
Does the 23LC512T-E/SN support quad-SPI (QSPI) mode?
Yes, the 23LC512T-E/SN supports Serial Quad Interface (SQI) mode using SIO0–SIO3 pins, delivering up to 4× the bandwidth of standard SPI. However, SQI mode disables the HOLD function, and entry/exit requires EQIO/RSTIO commands - confirmed in DS20005155C Section 4.2 and Figure 4-4.
What is the page size of the 23LC512T-E/SN, and how does it affect write operations?
The 23LC512T-E/SN has a fixed 32-byte page size. In Page mode, writes automatically increment the address pointer within that boundary; attempting to write beyond 32 bytes wraps to the start of the same page. This enables efficient burst writes without software address management - verified in Section 2.2 and Figure 2-4.
Can the 23LC512T-E/SN retain data during power loss?
The 23LC512T-E/SN guarantees data retention down to 1.0 V VCC (per D011 in Table 1-1), meaning it holds RAM contents during brown-out conditions until supply drops below this threshold. It is volatile memory and requires continuous power for indefinite retention - no built-in non-volatility.
Is the 23LC512T-E/SN pin-compatible with the 23A512 series?
No - the 23LC512T-E/SN operates from 2.5–5.5 V, while the 23A512 series requires 1.7–2.2 V. Though both share identical pinout, package, and instruction set, their incompatible VCC ranges prevent direct substitution without voltage domain redesign - explicitly stated in the Device Selection Table on page 1.
23LC512T-E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
23LC512T-E/SN FAQ
1.How can I place an order for 23LC512T-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 23LC512T-E/SN 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/SN reliable?
The price and inventory of 23LC512T-E/SN 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/SN is usually 5 days.
3.What payment methods are accepted for 23LC512T-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23LC512T-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 23LC512T-E/SN?
23LC512T-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 23LC512T-E/SN 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/SN?
For technical support, including 23LC512T-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23LC512T-E/SN requirements.
6.How does Aetrix verify that 23LC512T-E/SN is sourced from the original manufacturer or authorized distributors?
All 23LC512T-E/SN 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/SN meets industry standards.
7.What is the process for return or replacement of 23LC512T-E/SN?
All 23LC512T-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 23LC512T-E/SN, 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/SN part is unused and in its original packaging.
Return procedure for 23LC512T-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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