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Microchip Technology 23A512-E/SN
- Part No.:
- 23A512-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
23A512-E/SN.pdf
- Description:
- IC SRAM 512KBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,881
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Product details
Overview
23A512-E/SN from Microchip Technology is a 512-Kbit serial SRAM with SPI/SDI/SQI interface, operating at 1.7V–2.2V supply and supporting Industrial (−40°C to +85°C) and Extended (−40°C to +125°C) temperature ranges. It delivers 20 MHz clock rate, 3 mA read current at 5.5V/20 MHz, 4 µA standby current at +85°C, and 64K × 8-bit organization with 32-byte page size - used for real-time data buffering in microcontroller-based industrial controllers.
For engineers reviewing the 23A512-E/SN datasheet, 23A512-E/SN pinout, 23A512-E/SN application, or 23A512-E/SN equivalent, key selection criteria include low-voltage operation (1.7–2.2 V), dual/quad I/O support, zero write time, unlimited endurance, and SOIC-8 package compatibility with legacy SPI bus designs.
Technical Context
The 23A512-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 interface supports standard single-I/O, SDI (dual-line), and SQI (quad-line) protocols, enabling scalable bandwidth without changing physical connections.
It features dedicated HOLD functionality for transaction suspension during active sequences, and includes internal address auto-increment logic that handles page boundary wraparound in Page mode and full-array rollover in Sequential mode. The device powers on in Standby mode and requires CS low-to-high transition to initiate operations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8-bit) - provides sufficient buffer space for firmware stack variables or sensor log buffers in resource-constrained MCUs. |
| Supply Voltage | 1.7V–2.2V - enables direct integration with 1.8V logic domains and low-power microcontrollers without level-shifting. |
| Max Clock Frequency | 20 MHz (Industrial temp) - supports high-throughput data streaming up to ~2.5 MB/s in quad-I/O mode. |
| Read Current | 3 mA at 5.5V, 20 MHz - measured under worst-case voltage/frequency; actual draw at 2.2V is lower, easing thermal design. |
| Standby Current | 4 µA at +85°C - ensures minimal battery drain in always-on edge nodes or backup memory applications. |
| Page Size | 32 bytes - aligns with common MCU cache line sizes and simplifies firmware block-write optimization. |
| Data Retention Voltage | 1.0 V - guarantees RAM contents survive brown-out events down to 1.0V before data loss occurs. |
Pinout & Package
23A512-E/SN is packaged in an 8-lead narrow SOIC (SN) with 1.27 mm pitch, 3.90 mm body width, and RoHS-compliant matte tin finish. Pin 1 is marked by a beveled corner or dot; package conforms to JEDEC MS-012AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low enable; forces device into high-impedance Standby when high, allowing multi-drop SPI bus sharing. |
| SO/SIO1 | Serial Output / SDI/SQI Data Line | Tri-state output in SPI mode; becomes bidirectional I/O in SDI/SQI modes - requires external pull-up only in SPI. |
| SIO2 | SQI Data Line | Dedicated input/output in Quad mode; must not float in SPI/SDI - tied to VSS or VCC per datasheet guidance. |
| VSS | Ground Reference | Primary return path for all I/O and core logic; must be low-inductance connection to minimize noise coupling. |
| SI/SIO0 | Serial Input / SDI/SQI Data Line | Input-only in SPI; bidirectional in SDI/SQI - shares pin function with SO/SIO1 but operates independently in quad mode. |
| SCK | Serial Clock Input | Edge-triggered synchronous interface; rising edge latches SI, falling edge updates SO - defines timing budget. |
| HOLD/SIO3 | Hold Control / SQI Data Line | Suspends ongoing transfers without resetting state; disabled in SQI mode due to pin reuse as SIO3. |
| VCC | Power Supply | 1.7–2.2 V nominal; bypass capacitor (0.1 µF ceramic) required within 5 mm of VCC–VSS pins for stable operation. |
Key Features
| Feature | Design Value |
|---|---|
| Zero Write Time | Eliminates wait states after write commands - enables deterministic latency-critical logging (e.g., fault capture buffers). |
| Unlimited Read/Write Cycles | Guarantees >10¹² cycles - suitable for high-frequency telemetry buffers where EEPROM wear-out is unacceptable. |
| Multi-Mode Interface (SPI/SDI/SQI) | Single hardware footprint supports 1×, 2×, or 4× throughput scaling - reduces BOM count across product variants. |
| Page and Sequential Access Modes | Enables burst writes across 32-byte boundaries or full-array streaming - optimizes DMA efficiency in Cortex-M peripherals. |
| HOLD Functionality | Pauses active transfers mid-sequence without reinitialization - critical for interrupt-driven systems needing atomic memory access. |
Applications
| Industrial PLC Data Logging | Automotive Body Control Module |
|---|---|
Use Scenario: Capturing sensor timestamps and error codes during power-loss events in programmable logic controllers. IC Role / Device Role / Timing Role: Volatile SRAM buffer holding last 2–3 seconds of runtime data before safe shutdown. Use Value: 1.0 V data retention threshold ensures integrity through brown-out; 4 µA standby current extends backup capacitor hold-up time. |
Use Scenario: Storing door lock actuation history and window position calibration in vehicle body ECUs. IC Role / Device Role / Timing Role: High-speed scratchpad memory interfaced directly to 8-bit automotive MCU SPI port. Use Value: 20 MHz clock rate enables sub-millisecond write completion; SOIC-8 package fits constrained PCB layouts near CAN transceivers. |
| Medical Infusion Pump Memory | Smart Energy Meter Firmware Cache |
Use Scenario: Temporary storage of dosage delivery logs and motor control parameters during infusion therapy cycles. IC Role / Device Role / Timing Role: Non-volatile-equivalent buffer with deterministic zero-write latency for safety-critical audit trails. Use Value: Unlimited endurance prevents wear-out failure over 10+ year device lifetime; 1.7–2.2 V range matches isolated 1.8V power rail. |
Use Scenario: Caching metering algorithm coefficients and tariff tables updated nightly via PLC or RF link. IC Role / Device Role / Timing Role: High-bandwidth SPI slave supporting burst reads/writes to accelerate firmware update verification. Use Value: 32-byte page size aligns with AES-128 encryption block size; SDI mode doubles throughput vs. legacy SPI-only meters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 23LC512-I/SN | Wider VCC range (2.5–5.5 V); identical pinout, timing, and feature set except supply voltage. | Requires level-shifting when interfacing with 1.8V MCUs; unsuitable for ultra-low-voltage systems. | Select 23LC512-I/SN only if host system uses ≥2.5V I/O; otherwise 23A512-E/SN avoids external level translators. |
| FM25V05-G | F-RAM with 512 Kbit density, 3.0–3.6 V operation, 40 MHz SPI, and inherent non-volatility - no write delay or endurance limits. | Eliminates need for backup power or capacitor-based data retention; higher cost and different voltage domain. | Choose FM25V05-G when true non-volatility and instant write are mandatory; 23A512-E/SN remains optimal for cost-sensitive, 1.8V-buffered designs. |
Compared with 23LC512-I/SN, 23A512-E/SN enables direct 1.8V MCU interfacing without level shifters; versus FM25V05-G, it offers lower unit cost and proven SRAM timing predictability, though requiring external retention support during power loss.
Availability
23A512-E/SN is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and medical device applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for 23A512-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 is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with emphasis on reliability, longevity, and industrial-grade qualification.
The 23A512-E/SN belongs to Microchip's serial SRAM product line, designed specifically for low-voltage, high-reliability buffering in microcontroller subsystems where EEPROM latency or Flash write wear are limiting factors.
FAQ
What is the maximum clock frequency supported by the 23A512-E/SN in Industrial temperature range?
The 23A512-E/SN supports up to 20 MHz clock frequency when operated across the Industrial temperature range (−40°C to +85°C). This specification is validated per AC Characteristics Table 1-2 in DS20005155C, and applies to all interface modes - SPI, SDI, and SQI - provided VCC remains within 1.7V–2.2V.
Does the 23A512-E/SN retain data during power loss, and what is the minimum voltage for data retention?
Yes, the 23A512-E/SN retains stored data down to 1.0 V (VDR parameter, DS20005155C page 3), meaning RAM contents remain valid during brown-out conditions until VCC drops below this threshold. Below 1.0 V, data loss occurs; external backup capacitors or supercapacitors are commonly used to extend hold-up time.
Can the HOLD pin be used when the 23A512-E/SN is operating in SQI mode?
No, the HOLD functionality is explicitly disabled in SQI mode because pin 7 (HOLD/SIO3) is repurposed as SIO3 for quad-data transmission. As stated in Section 3.5 and Figure 3-3 of DS20005155C, HOLD is only available in SPI and SDI configurations - attempting to assert HOLD in SQI mode has no effect.
What package type does the suffix "/SN" indicate for the 23A512-E/SN?
The "/SN" suffix denotes the 8-lead narrow-body SOIC package (3.90 mm width), per Microchip's packaging nomenclature in DS20005155C page 19. This package uses 1.27 mm pitch, complies with JEDEC MS-012AA, and is compatible with standard SOIC-8 footprints and reflow profiles.
How many write cycles can the 23A512-E/SN endure, and is endurance affected by temperature or voltage?
The 23A512-E/SN guarantees unlimited read and write cycles - defined as >10¹² operations - across its full rated temperature and voltage range. This endurance claim is intrinsic to SRAM cell architecture and is unaffected by operating conditions; no wear-out mechanism exists unlike Flash or EEPROM technologies.
23A512-E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 1.7V ~ 2.2V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
23A512-E/SN FAQ
1.How can I place an order for 23A512-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 23A512-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 23A512-E/SN reliable?
The price and inventory of 23A512-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 23A512-E/SN is usually 5 days.
3.What payment methods are accepted for 23A512-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23A512-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 23A512-E/SN?
23A512-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 23A512-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 23A512-E/SN?
For technical support, including 23A512-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23A512-E/SN requirements.
6.How does Aetrix verify that 23A512-E/SN is sourced from the original manufacturer or authorized distributors?
All 23A512-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 23A512-E/SN meets industry standards.
7.What is the process for return or replacement of 23A512-E/SN?
All 23A512-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 23A512-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 23A512-E/SN part is unused and in its original packaging.
Return procedure for 23A512-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
23A512-E/SN Tags
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AT24C02C-XHM-T
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