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Microchip Technology 23A512T-I/SN
- Part No.:
- 23A512T-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
23A512T-I/SN.pdf
- Description:
- IC SRAM 512KBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,862
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Product details
Overview
23A512T-I/SN from Microchip Technology is a 512-Kbit serial SRAM with SPI/SDI/SQI interface, operating at 1.7–2.2 V and supporting Industrial temperature range (–40°C to +85°C). It delivers 20 MHz clock rate, 3 mA read current at 5.5 V (typical), 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 23A512T-I/SN datasheet, 23A512T-I/SN pinout, 23A512T-I/SN application, or 23A512T-I/SN equivalent, key selection criteria include low-voltage operation (1.7–2.2 V), SDI/SQI high-speed interface support, zero write time, unlimited endurance, and SOIC-8 packaging compatibility with legacy SPI bus designs.
Technical Context
The 23A512T-I/SN implements a serial SRAM architecture with three configurable access modes - Byte, Page, and Sequential - controlled via a writable MODE register. Its dual- and quad-I/O capability (via EDIO/EQIO commands) enables bandwidth scaling beyond standard SPI, while HOLD functionality supports transaction suspension without sequence reset.
It uses separate SI/SO lines in SPI mode, shares SIO0–SIO3 pins across SDI/SQI modes, and disables HOLD during SQI operation. Power-on defaults to Standby mode (CS = high), requiring CS low-to-high transition to initiate active communication - ensuring deterministic initialization in embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 512 Kbit (64K × 8-bit), enabling 64 KB of volatile buffer space for firmware stacks or sensor data logging |
| Supply voltage | 1.7 V to 2.2 V - compatible with 1.8 V logic domains and low-power MCU subsystems |
| Max clock frequency | 20 MHz (Industrial temp) - supports 2.5 MB/s sustained throughput in SPI mode |
| Read current | 3 mA at 5.5 V, 20 MHz - measured under worst-case VCC; actual draw at 2.2 V is lower per DC characteristics |
| Standby current | 4 µA at +85°C - ensures ultra-low power retention in battery-backed or energy-harvesting applications |
| Page size | 32 bytes - defines minimum efficient write granularity and aligns with common MCU cache line sizes |
| Data retention voltage | 1.0 V minimum - guarantees RAM contents survive brown-out events down to 1.0 V before data loss |
Pinout & Package
23A512T-I/SN is packaged in an 8-lead narrow SOIC (SN) body, 3.90 mm wide, with JEDEC-standard footprint and RoHS-compliant matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low enable; forces device into Standby (high-Z SO) when deasserted - enables multi-drop SPI bus sharing |
| SO/SIO1 | Serial Output / SDI/SQI Pin | Tri-state output in SPI mode; bidirectional I/O in SDI/SQI - requires external pull-up only if shared with other devices |
| SIO2 | SQI Pin | Quad-data input/output in SQI mode only; must not float in SPI/SDI - tied to VSS or VCC per application note |
| VSS | Ground | Reference return path for all I/O and core logic; requires low-inductance connection to minimize noise coupling |
| SI/SIO0 | Serial Input / SDI/SQI Pin | Input in SPI mode; bidirectional I/O in SDI/SQI - latched on rising SCK edge with 10 ns setup/hold timing |
| SCK | Serial Clock Input | Asynchronous master clock; controls all data transfers; rise/fall times ≤20 ns required for 20 MHz compliance |
| HOLD/SIO3 | Hold / SQI Pin | Suspends ongoing SPI transfer without resetting address pointer; disabled in SQI mode - must be held high unless actively used |
| VCC | Power Supply | 1.7–2.2 V supply; bypass capacitor (0.1 µF ceramic) required within 5 mm of pin for stable operation |
Key Features
| Feature | Design Value |
|---|---|
| Zero write time | Eliminates wait states during byte/page writes - enables deterministic latency-critical logging (e.g., motor fault capture) |
| Unlimited read/write cycles | Supports continuous data streaming over product lifetime without wear leveling or refresh management overhead |
| SDI/SQI interface support | Doubles (SDI) or quadruples (SQI) effective throughput vs. standard SPI - reduces host CPU load in high-bandwidth sensor fusion |
| Three configurable access modes | Byte (single-location), Page (32-byte burst), Sequential (full-array wraparound) - selectable via MODE register for optimal use-case alignment |
| Industrial temperature range | Guaranteed operation from –40°C to +85°C - validated for deployment in factory automation PLCs and outdoor metering hardware |
Applications
| Industrial Data Logger | Medical Sensor Hub |
|---|---|
Use Scenario: Captures timestamped analog sensor readings (temperature, pressure) at 1 kHz in standalone field-deployed units with intermittent wireless upload. IC Role / Device Role / Timing Role: Volatile high-speed buffer between ADC controller and RF transceiver - absorbs burst sampling while host processes prior batch. Use Value: Zero write time and 32-byte page alignment enable lock-free circular buffer implementation without software overhead or memory fragmentation. | Use Scenario: Aggregates ECG, SpO₂, and respiration waveforms from multiple front-end ASICs in portable patient monitors before compression and display. IC Role / Device Role / Timing Role: Shared-memory FIFO for multi-channel DMA transfers - synchronized to system clock domain via SPI handshake signals. Use Value: 20 MHz SPI clock and sequential read mode deliver >2 MB/s sustained throughput, matching dual 12-bit ADC streams at 1 MSPS each. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Stores runtime configuration, error logs, and calibration offsets in 12 V automotive environments with transient-suppressed 1.8 V rail. IC Role / Device Role / Timing Role: Nonvolatile shadow RAM for EEPROM emulation - updated only on parameter change, not every cycle. Use Value: 1.7–2.2 V operation tolerates cold-crank dips; 1.0 V data retention voltage prevents corruption during 50 ms battery dropouts. | Use Scenario: Buffers 15-minute interval consumption data from metrology ICs for AMI (Advanced Metering Infrastructure) transmission during GSM/GPRS wake-up windows. IC Role / Device Role / Timing Role: Low-power scratchpad memory - retains data during deep-sleep (4 µA standby) between measurement intervals. Use Value: 4 µA standby current at +85°C extends battery life in sealed meters; RoHS-compliant SN package meets global utility certification requirements. |
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 voltage rating | Requires ≥2.5 V supply; unsuitable for 1.8 V-only systems but simplifies design in mixed-voltage boards | Select 23LC512-I/SN only if system VCC ≥2.5 V and interoperability with legacy 3.3/5 V peripherals is needed |
| FM25V05-G | F-RAM technology; 1.8–3.6 V supply; 40 MHz SPI; 10¹⁴ write cycles; no write delay | Higher cost; superior endurance and write speed, but different timing margins and command set | Choose FM25V05-G when write-intensive logging (>1000 writes/sec) or instant-write reliability outweighs cost sensitivity |
Compared with 23LC512-I/SN, the 23A512T-I/SN enables direct integration into 1.8 V domains without level-shifting; versus FM25V05-G, it offers lower unit cost and proven qualification for industrial temperature operation, albeit with conventional SRAM endurance limits.
Availability
23A512T-I/SN is available at Aetrix Electronics and suitable for industrial data loggers, medical sensor hubs, automotive body control modules, and smart energy meters requiring stable component supply across extended production lifecycles.
Supply support for 23A512T-I/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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 23A512T-I/SN belongs to Microchip's serial SRAM product line, engineered specifically for low-voltage, high-reliability embedded buffering where deterministic timing, zero write latency, and industrial temperature resilience are critical.
FAQ
What is the operating voltage range for the 23A512T-I/SN?
The 23A512T-I/SN operates from 1.7 V to 2.2 V, making it compatible with 1.8 V logic systems. This range is strictly defined in the DC Characteristics table (Param D001) and excludes operation outside these limits - applying <1.7 V risks data retention failure, while >2.2 V violates absolute maximum ratings and may cause permanent damage. The 23A512T-I/SN is not rated for 2.5 V or higher supplies.
Does the 23A512T-I/SN support Quad SPI (QSPI) mode?
Yes, the 23A512T-I/SN supports Serial Quad Interface (SQI) mode using the EQIO command, enabling four-bit-per-clock data transfers. However, SQI mode disables the HOLD function and requires SIO0–SIO3 pins as bidirectional data lines. The 23A512T-I/SN does not implement JEDEC-standard QSPI; its SQI is a proprietary Microchip protocol with distinct command set and timing.
What is the maximum clock frequency supported by the 23A512T-I/SN at Industrial temperature?
The 23A512T-I/SN supports up to 20 MHz clock frequency across the full Industrial temperature range (–40°C to +85°C), as specified in Table 1-2 (AC Characteristics, Param 1). This is confirmed for both SPI and SDI modes; SQI mode also supports 20 MHz but requires stricter signal integrity due to higher effective data rates.
How many write cycles can the 23A512T-I/SN endure?
The 23A512T-I/SN guarantees unlimited write cycles - a defining characteristic of SRAM technology. Unlike flash or EEPROM, it imposes no endurance limit on byte, page, or sequential writes. This is explicitly stated in the Features section and validated across all operating conditions, including at +85°C and minimum VCC.
Is the 23A512T-I/SN pin-compatible with the 23LC512-I/SN?
Yes, the 23A512T-I/SN and 23LC512-I/SN share identical 8-pin SOIC (SN) packaging, pin functions, pinout order, and AC/DC timing specifications - they are pin-for-pin compatible. The sole functional difference is the VCC range: 23A512T-I/SN requires 1.7–2.2 V, whereas 23LC512-I/SN operates from 2.5–5.5 V. Swapping them requires verifying supply voltage compliance.
23A512T-I/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:
- 20 MHz
- Write Cycle Time - Word, Page:
- -
- Access Time:
- -
- Voltage - Supply:
- 1.7V ~ 2.2V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
23A512T-I/SN FAQ
1.How can I place an order for 23A512T-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 23A512T-I/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 23A512T-I/SN reliable?
The price and inventory of 23A512T-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 23A512T-I/SN is usually 5 days.
3.What payment methods are accepted for 23A512T-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23A512T-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 23A512T-I/SN?
23A512T-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 23A512T-I/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 23A512T-I/SN?
For technical support, including 23A512T-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23A512T-I/SN requirements.
6.How does Aetrix verify that 23A512T-I/SN is sourced from the original manufacturer or authorized distributors?
All 23A512T-I/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 23A512T-I/SN meets industry standards.
7.What is the process for return or replacement of 23A512T-I/SN?
All 23A512T-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 23A512T-I/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 23A512T-I/SN part is unused and in its original packaging.
Return procedure for 23A512T-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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