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Microchip Technology 23A512T-E/SN
- Part No.:
- 23A512T-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
23A512T-E/SN.pdf
- Description:
- IC SRAM 512KBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,747
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Product details
Overview
23A512T-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 23A512T-E/SN datasheet, 23A512T-E/SN pinout, 23A512T-E/SN application, or 23A512T-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 (SN) package compatibility with legacy SPI host designs.
Technical Context
The 23A512T-E/SN implements a true serial SRAM architecture with separate SI/SO lines for standard SPI mode, and reconfigurable SIO0–SIO3 pins for SDI (2-bit/clock) and SQI (4-bit/clock) modes. Its MODE register (bits 7:6) selects Byte, Page, or Sequential operation - enabling flexible memory access without external address latching.
It features hardware HOLD functionality (active-low, synchronous to SCK) for pausing ongoing transfers, and supports RDMR/WRMR instructions for runtime mode configuration. The device powers up in Standby mode (CS high), requires CS low to initiate any operation, and maintains data retention down to 1.0 V VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8-bit) - provides sufficient buffer space for firmware logging or sensor FIFOs in resource-constrained MCUs. |
| Supply Voltage | 1.7 V to 2.2 V - enables direct interfacing with 1.8 V logic systems without level-shifting. |
| Max Clock Frequency | 20 MHz (I-temp), 16 MHz (E-temp) - supports high-throughput data streaming in real-time control loops. |
| Read Current | 3 mA at 5.5 V, 20 MHz - measured under worst-case voltage/frequency; actual draw at 2.2 V is lower per DC specs. |
| Standby Current | 4 µA at +85°C - ensures ultra-low power retention during MCU sleep modes in battery-backed applications. |
| Data Retention Voltage | 1.0 V minimum - guarantees RAM contents survive brown-out events down to 1.0 V before data loss. |
| Page Size | 32 bytes - defines maximum burst length per write command; critical for optimizing firmware write efficiency. |
Pinout & Package
8-Lead SOIC (SN) package, 3.90 mm body width, JEDEC MS-012 variant, RoHS-compliant matte tin finish. Pin 1 marked by notch or dot; pin 1 location confirmed per Microchip Drawing C04-057-SN Rev H.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low enable; forces device into Standby (high-Z SO) when deasserted - enables multi-device SPI bus sharing. |
| SO/SIO1 | Serial Output / SDI/SQI Data Line | Tri-state output in SPI mode; bidirectional in SDI/SQI - requires external pull-up only if shared with other devices. |
| SIO2 | SQI Data Line | Used exclusively in Quad I/O mode; must be tied to VSS or pulled low in SPI/SDI mode per datasheet note. |
| 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 mode; bidirectional in SDI/SQI - shares physical pin with SO/SIO1 in dual/quad configurations. |
| SCK | Serial Clock Input | Synchronizes all data transfers; rising edge latches SI, falling edge updates SO - timing-critical for setup/hold compliance. |
| HOLD/SIO3 | Hold Control / SQI Data Line | Pauses active transfer without resetting internal address counter; disabled in SQI mode due to pin reuse. |
| 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 data capture (e.g., ADC sample buffering). |
| Unlimited Read/Write Cycles | No wear-out mechanism - suitable for high-frequency logging (e.g., motor controller fault history) without endurance concerns. |
| SDI & SQI Interface Support | Doubles (SDI) or quadruples (SQI) effective throughput vs. standard SPI - reduces host CPU overhead in bandwidth-limited systems. |
| Three Access Modes | Byte (single-location), Page (32-byte burst), Sequential (full-array wraparound) - allows firmware to match access pattern to use case. |
| HOLD Function | Hardware-paused transfers retain internal state - essential for interrupt-driven hosts needing non-disruptive context switching. |
Applications
| Industrial PLC I/O Module | Automotive Body Controller |
|---|---|
Use Scenario: Real-time buffering of analog sensor inputs (temperature, pressure) sampled at 1 kHz across multiple channels. IC Role / Device Role / Timing Role: Serial SRAM acting as volatile data FIFO between ADC peripheral and MCU DMA engine. Use Value: 32-byte page writes align with typical DMA burst sizes; 20 MHz clock sustains 2.5 MB/s peak throughput without stalling host. | Use Scenario: Storing dynamic configuration parameters (window position, mirror angle, seat memory) during vehicle ignition cycles. IC Role / Device Role / Timing Role: Low-voltage (1.8 V) SRAM interfaced directly to automotive-grade MCU SPI port. Use Value: 1.7–2.2 V operation matches MCU I/O rail; 4 µA standby current minimizes parasitic drain on 12 V battery via LDO. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Temporary storage of dosing history and alarm logs during power-loss events prior to nonvolatile backup. IC Role / Device Role / Timing Role: Volatile memory buffer with 1.0 V data retention threshold - bridges gap until backup capacitor discharges. Use Value: Zero write time ensures no log entries are lost during rapid alarm generation; unlimited cycles prevent field failure from frequent writes. | Use Scenario: Holding 15-minute interval energy consumption data before batch upload to concentrator over PLC or RF link. IC Role / Device Role / Timing Role: High-reliability serial SRAM operating in extended temperature range (−40°C to +125°C) inside meter enclosure. Use Value: E-temp rating validated per datasheet; 16 MHz max clock at +125°C ensures deterministic data capture even in hot outdoor installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 23LC512T-E/SN | Wider VCC range (2.5–5.5 V); identical pinout, timing, and instruction set. | Requires level-shifting when interfacing with 1.8 V hosts; not suitable for sub-2.5 V systems. | Select when existing design uses 3.3 V or 5 V rails and needs drop-in replacement without layout change. |
| FM25V512-G | F-RAM technology; 1.8 V min VCC; 40 MHz max clock; no write delay; 10¹⁴ endurance. | Higher cost; different timing model (no CS hold time requirement); requires updated driver for FRAM-specific behavior. | Select when zero write time and extreme endurance are mandatory, and budget permits premium F-RAM pricing. |
Compared with 23LC512T-E/SN, the 23A512T-E/SN enables direct 1.8 V integration but sacrifices voltage flexibility; compared with FM25V512-G, it offers lower cost and proven SPI compatibility at the expense of endurance and speed - making it optimal for cost-sensitive, low-voltage industrial buffering.
Availability
23A512T-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 support, and RoHS-compliant packaging.
Supply support for 23A512T-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, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 23A512T-E/SN belongs to Microchip's serial SRAM product line, engineered for low-power, high-reliability data buffering in microcontroller-based systems where SPI interface simplicity and deterministic timing are critical.
FAQ
What is the operating voltage range for the 23A512T-E/SN?
The 23A512T-E/SN operates from 1.7 V to 2.2 V, as specified in the Device Selection Table and DC Characteristics section. This narrow range targets 1.8 V logic systems and eliminates need for level translation when interfacing with compatible MCUs. Operation outside this range may cause functional failure or data corruption.
Does the 23A512T-E/SN support Quad SPI (QSPI) mode?
Yes, the 23A512T-E/SN supports Serial Quad Interface (SQI) mode using SIO0–SIO3 pins, enabled via the EQIO command (0x38). However, HOLD functionality is disabled in SQI mode due to pin multiplexing, and pin 3 (SIO2) must be actively driven or terminated per datasheet guidance.
What is the maximum clock frequency for the 23A512T-E/SN at +125°C?
At Extended temperature (−40°C to +125°C), the 23A512T-E/SN supports a maximum clock frequency of 16 MHz, as explicitly stated in Note 1 of the Device Selection Table and confirmed in Table 1-2 AC Characteristics. Exceeding this violates timing specifications and risks data corruption.
How many write cycles does the 23A512T-E/SN guarantee?
The 23A512T-E/SN guarantees unlimited write cycles - a fundamental characteristic of SRAM technology. Unlike flash or EEPROM, it has no wear-out mechanism, making it ideal for applications requiring frequent, rapid writes such as real-time data logging or FIFO buffering.
Is the 23A512T-E/SN pin-compatible with the 23LC512T-E/SN?
Yes, the 23A512T-E/SN and 23LC512T-E/SN share identical 8-lead SOIC (SN) package dimensions, pinout, and signal definitions. They differ only in VCC range (1.7–2.2 V vs. 2.5–5.5 V) and associated DC parameters - allowing PCB reuse when voltage rails align with the selected variant.
23A512T-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:
- 1.7V ~ 2.2V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
23A512T-E/SN FAQ
1.How can I place an order for 23A512T-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 23A512T-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 23A512T-E/SN reliable?
The price and inventory of 23A512T-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 23A512T-E/SN is usually 5 days.
3.What payment methods are accepted for 23A512T-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23A512T-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 23A512T-E/SN?
23A512T-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 23A512T-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 23A512T-E/SN?
For technical support, including 23A512T-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23A512T-E/SN requirements.
6.How does Aetrix verify that 23A512T-E/SN is sourced from the original manufacturer or authorized distributors?
All 23A512T-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 23A512T-E/SN meets industry standards.
7.What is the process for return or replacement of 23A512T-E/SN?
All 23A512T-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 23A512T-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 23A512T-E/SN part is unused and in its original packaging.
Return procedure for 23A512T-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
23A512T-E/SN Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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