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Microchip Technology 23A1024T-I/SN
- Part No.:
- 23A1024T-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
23A1024T-I/SN.pdf
- Description:
- IC SRAM 1MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,222
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Product details
Overview
23A1024T-I/SN from Microchip Technology is a 1 Mbit (128K × 8) low-voltage SPI Serial SRAM with SDI and SQI interface support, operating from 1.7–2.2 V over –40°C to +85°C. It delivers 20 MHz clock rate in SPI/SDI/SQI modes, 3 mA read current at 2.2 V, and 4 µA standby current at +85°C, enabling fast, low-power data buffering in space-constrained embedded systems.
For engineers reviewing the 23A1024T-I/SN datasheet, 23A1024T-I/SN pinout, 23A1024T-I/SN application, or 23A1024T-I/SN equivalent, this page provides verified technical context, package-validated pin functions, real-world use scenarios, and two confirmed alternative parts for industrial-grade serial memory selection.
Technical Context
The 23A1024T-I/SN implements a true serial SRAM architecture with no internal refresh, supporting byte/page/sequential read/write operations and zero write time. Its MODE register (bits 7–6) configures operation mode-Byte (00), Page (10), or Sequential (01 default)-with automatic address incrementing and page boundary handling.
It supports three bus protocols on shared pins: standard SPI (SI/SO/SCK/CS), dual I/O SDI (SIO0/SIO1), and quad I/O SQI (SIO0–SIO3), with dedicated RSTIO (0xFF) command to revert from SDI/SQI to SPI mode. HOLD functionality is active only in SPI/SDI modes-not in SQI-and requires SCK-low assertion for reliable suspend/resume.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (128K × 8 bits); enables full frame buffering for 128 KB of volatile data without external refresh logic. |
| Supply Voltage | 1.7–2.2 V; compatible with modern ultra-low-voltage microcontrollers and battery-backed systems. |
| Max Clock Frequency | 20 MHz (I-temp); sustains 2.5 MB/s sequential throughput in SPI mode, 5 MB/s in SDI, 10 MB/s in SQI. |
| Read Current | 3 mA at 2.2 V, 20 MHz; allows sustained high-speed reads without thermal derating in compact PCB layouts. |
| Standby Current | 4 µA at +85°C; supports multi-year battery life in always-on sensor nodes or energy-harvesting applications. |
| Page Size | 32 bytes; optimizes burst writes while minimizing write-cycle overhead and avoiding partial-page corruption risks. |
| Data Retention Voltage | 1.0 V minimum; ensures RAM contents survive brown-out events down to near-threshold supply levels. |
Pinout & Package
23A1024T-I/SN is packaged in an 8-lead SOIC (SN) with 3.90 mm body width, RoHS-compliant matte tin finish, and JEDEC-standard footprint (SOIC-8 narrow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select Input | Active-low enable; forces device into high-impedance standby when high, enabling multi-drop SPI bus sharing. |
| 2 SO/SIO1 | Serial Output / Dual/Quad I/O | Tri-state output in SPI mode; bidirectional data lane in SDI/SQI; latched on SCK rising edge, updated after falling edge. |
| 3 SIO2 | Serial I/O 2 (SQI-only) | Used exclusively in SQI mode for parallel nibble transfer; must be pulled high if unused to prevent accidental mode lock. |
| 4 VSS | Ground Reference | Primary return path for all I/O and core logic; requires low-inductance connection to minimize noise coupling during high-speed transfers. |
| 5 SI/SIO0 | Serial Input / Dual/Quad I/O | Input in SPI mode; bidirectional in SDI/SQI; accepts instruction/address/data MSB-first with setup/hold timing per AC specs. |
| 6 SCK | Serial Clock Input | Synchronizes all data transfers; rising edge latches input, falling edge updates output; max 20 MHz with 25 ns min pulse width. |
| 7 HOLD/SIO3 | Hold Control / Quad I/O | HOLD active only in SPI/SDI; suspends ongoing transfer without reset; disabled in SQI mode where pin serves as SIO3. |
| 8 VCC | Power Supply | 1.7–2.2 V core supply; decoupling capacitor (0.1 µF ceramic) required within 5 mm for stable 20 MHz operation. |
Key Features
| Feature | Design Value |
|---|---|
| Unlimited Read/Write Cycles | Enables continuous logging or real-time buffer rotation without wear-out concerns-no endurance limits unlike flash or EEPROM. |
| Zero Write Time | Eliminates wait states after write commands; data is immediately available for subsequent reads, simplifying firmware timing. |
| SDI & SQI Compatibility | Doubles (SDI) or quadruples (SQI) effective bandwidth vs. SPI using same physical pins-no PCB redesign needed for speed upgrade. |
| Industrial Temp Range | Rated for –40°C to +85°C operation; validated across full range for AC/DC power supplies, motor controllers, and factory automation. |
| Page and Sequential Modes | Reduces command overhead: Page mode auto-increments within 32-byte boundaries; Sequential mode wraps at 1FFFFh for circular buffers. |
Applications
| Industrial Data Logger | Medical Sensor Hub |
|---|---|
|
Use Scenario: Continuous acquisition of ECG, SpO₂, and temperature data at 1 kHz sampling rate with local pre-processing before wireless upload. IC Role / Device Role / Timing Role: High-speed, low-power serial SRAM buffer staging raw sensor samples between ADC capture and BLE/Wi-Fi transmission bursts. Use Value: 20 MHz SPI interface sustains 2.5 MB/s burst writes; 4 µA standby current extends battery life beyond 6 months on coin cell. |
Use Scenario: Real-time aggregation of multi-parameter vital signs from distributed bedside sensors into a centralized display unit. IC Role / Device Role / Timing Role: Volatile frame buffer holding synchronized timestamped datasets prior to CRC validation and display rendering. Use Value: Zero write time eliminates firmware delay loops; 128K × 8 capacity stores >10 seconds of 16-bit sensor streams at 10 kHz aggregate rate. |
| Automotive Body Controller | Smart Energy Meter |
|
Use Scenario: Storing transient fault codes, door/window status history, and lighting sequence logs in a Class A automotive module. IC Role / Device Role / Timing Role: Non-refresh volatile memory retaining diagnostic snapshots during ignition cycles and brief power interruptions. Use Value: 1.0 V data retention voltage preserves logs during 12 V battery dips to 9 V; industrial temp rating covers under-hood thermal cycling. |
Use Scenario: Buffering 15-minute interval consumption data, tariff schedules, and tamper-event timestamps in DIN-rail mounted meters. IC Role / Device Role / Timing Role: High-reliability scratchpad memory for time-critical metering firmware performing AES encryption and secure boot verification. Use Value: Unlimited write cycles support daily firmware updates and decades of hourly log writes; RoHS-compliant SN package meets EU compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 23LC1024-I/SN | Wider VCC range (2.5–5.5 V); identical pinout, timing, and instruction set; no voltage-level translation needed for 3.3 V/5 V systems. | Preferred for mixed-voltage designs or legacy 5 V MCU interfaces; not suitable for sub-2.2 V battery-powered devices. | Select 23LC1024-I/SN when system VCC ≥ 2.5 V and interoperability with 5 V peripherals is required. |
| IS66WV1M8ALL-15MLI | Parallel-interface 1 Mbit SRAM (x8), 15 ns access, 3.3 V only; no SPI/SDI/SQI support; requires 28-pin SOIC footprint. | Used where microcontroller lacks SPI hardware or demands nanosecond-level random access latency. | Choose IS66WV1M8ALL-15MLI only when parallel bus interface and <15 ns random access are mandatory-requires PCB layout change. |
Compared with 23LC1024-I/SN, the 23A1024T-I/SN enables lower-system-power designs below 2.2 V while maintaining identical feature set; versus IS66WV1M8ALL-15MLI, it trades random-access speed for SPI footprint efficiency and zero external address/control logic.
Availability
23A1024T-I/SN is available at Aetrix Electronics and suitable for industrial data loggers, medical sensor hubs, and automotive body controllers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for 23A1024T-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 microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 23A1024/23LC1024 family was designed specifically for low-voltage, high-speed serial memory expansion in resource-constrained embedded systems-emphasizing SPI compatibility, ultra-low standby power, and seamless protocol scalability from SPI to SQI.
FAQ
What is the maximum clock frequency supported by the 23A1024T-I/SN in industrial temperature range?
The 23A1024T-I/SN supports up to 20 MHz clock frequency across its full industrial temperature range (–40°C to +85°C). This is explicitly specified in the Device Selection Table and confirmed in Table 1-2 AC Characteristics for I-temp operation. The 23A1024T-I/SN maintains full timing compliance-including setup/hold, output valid, and clock pulse width-up to this rate without derating.
Does the 23A1024T-I/SN support quad SPI (QSPI) mode, and how is it enabled?
Yes, the 23A1024T-I/SN supports Serial Quad Interface (SQI) mode, enabled by issuing the EQIO command (0x38) via the SPI bus. In SQI mode, pins SIO0–SIO3 become bidirectional data lanes, allowing four bits per clock cycle. Note that HOLD functionality is disabled in SQI mode, and pin 3 (SIO2) must not be left floating.
What is the purpose of the HOLD pin on the 23A1024T-I/SN, and when is it functional?
The HOLD pin on the 23A1024T-I/SN suspends ongoing serial communication without resetting the transaction-useful for servicing higher-priority interrupts. It is functional only in SPI and SDI modes; it is repurposed as SIO3 in SQI mode and cannot be used for hold. Assertion requires SCK to be low, and recovery also requires SCK low for deterministic behavior.
How does the 23A1024T-I/SN handle page boundaries during write operations in Page mode?
In Page mode (MODE[7:6] = 10), the 23A1024T-I/SN automatically increments the internal address counter for each byte written-but wraps to the start of the same 32-byte page upon reaching the page boundary. This prevents accidental overwrite of data outside the intended page and enforces atomic 32-byte-aligned write bursts, simplifying firmware buffer management.
Is the 23A1024T-I/SN pin-compatible with the 23LC1024-I/SN, and what are the key electrical differences?
Yes, the 23A1024T-I/SN is fully pin-compatible and functionally identical to the 23LC1024-I/SN-including pinout, instruction set, timing, and package. The key difference is supply voltage: 23A1024T-I/SN operates from 1.7–2.2 V, while 23LC1024-I/SN requires 2.5–5.5 V. Both share identical industrial temperature rating and SOIC-8 (SN) packaging.
23A1024T-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:
- 1Mbit
- Memory Organization:
- 128K 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
23A1024T-I/SN FAQ
1.How can I place an order for 23A1024T-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 23A1024T-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 23A1024T-I/SN reliable?
The price and inventory of 23A1024T-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 23A1024T-I/SN is usually 5 days.
3.What payment methods are accepted for 23A1024T-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23A1024T-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 23A1024T-I/SN?
23A1024T-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 23A1024T-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 23A1024T-I/SN?
For technical support, including 23A1024T-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23A1024T-I/SN requirements.
6.How does Aetrix verify that 23A1024T-I/SN is sourced from the original manufacturer or authorized distributors?
All 23A1024T-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 23A1024T-I/SN meets industry standards.
7.What is the process for return or replacement of 23A1024T-I/SN?
All 23A1024T-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 23A1024T-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 23A1024T-I/SN part is unused and in its original packaging.
Return procedure for 23A1024T-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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