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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Microchip Technology 23A1024-I/SN

Name: 23A1024-I/SN
Brand: Microchip Technology
SKU: 23A1024-I/SN
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 23A1024-I/SN

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: 23A1024-I/SN.pdf

Description:: IC SRAM 1MBIT SPI/QUAD 8SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

23A1024-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, power-efficient data buffering in microcontroller-based edge nodes.

For engineers reviewing the 23A1024-I/SN datasheet, 23A1024-I/SN pinout, 23A1024-I/SN application, or 23A1024-I/SN equivalent, this page provides verified functional mode behavior (Byte/Page/Sequential), dual/quad I/O timing constraints, HOLD/SQI mode limitations, and industrial-temperature package validation for real-world embedded memory integration.

Technical Context

The 23A1024-I/SN implements a serial SRAM architecture with three configurable access modes-Byte (00), Page (10), and Sequential (01)-controlled via a writable 8-bit MODE register. Its SPI-compatible bus supports standard SI/SO, dual I/O (SIO0/SIO1), and quad I/O (SIO0–SIO3) protocols, with instruction set including READ (0x03), WRITE (0x02), EDIO (0x3B), EQIO (0x38), and RSTIO (0xFF).

It features zero write time, unlimited read/write endurance, and automatic address rollover at array boundary (0x1FFFF → 0x00000). The HOLD pin enables mid-sequence suspension in SPI/SDI modes only; it functions as SIO3 in SQI mode, disabling HOLD functionality entirely per datasheet Section 3.6 and Figure 3-1.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	1 Mbit (128K × 8), organized as 4096 pages of 32 bytes - enables efficient burst writes within page boundaries without wraparound.
Supply Voltage	1.7–2.2 V - compatible with ultra-low-power MCU domains and battery-backed systems; not interoperable with 2.5–5.5 V 23LC1024 variants.
Max Clock Frequency	20 MHz (Industrial temp) - supports 2.5 MB/s sustained throughput in quad I/O mode, critical for high-speed sensor logging.
Read Current	3 mA at 2.2 V, 20 MHz - defines active power budget for continuous streaming applications like audio buffer or firmware overlay.
Standby Current	4 µA at +85°C - ensures multi-year operation in always-on IoT endpoints with infrequent memory access.
Data Retention Voltage	1.0 V minimum - guarantees RAM data integrity during brown-out conditions down to near-threshold supply levels.
Temperature Range	–40°C to +85°C (Industrial grade) - validated for deployment in industrial control panels, motor drives, and automotive body electronics.

Pinout & Package

8-lead SOIC (SN) package, 3.90 mm body width, RoHS-compliant matte tin finish. Pin 1 marked by notch or dot; pin 3 (SIO2) is unused in SPI/SDI modes and must be tied high or low - not left floating - to ensure reliable mode recovery after accidental EQIO command.

Pin/Terminal	Circuit Role	Design Meaning
1 CS	Chip Select Input	Active-low enable; forces device into high-impedance standby when high - essential for multi-drop SPI bus sharing.
2 SO/SIO1	Serial Output / Dual/Quad I/O	Tri-states immediately on HOLD assertion; bidirectional in SDI/SQI - requires level-shifting if interfacing with 3.3 V masters in 1.8 V domain.
3 SIO2	Serial I/O 2 (SQI only)	Unused in SPI/SDI; must be externally biased - floating causes undefined behavior and potential bus lockup per Section 3.3.
4 VSS	Ground Reference	Primary return path for all I/O and core logic; requires low-inductance connection to minimize noise coupling into sensitive SRAM array.
5 SI/SIO0	Serial Input / Dual/Quad I/O	Latches data on rising SCK edge; bidirectional in SDI/SQI - shares same timing constraints (TSU/THD = 10 ns) across all modes.
6 SCK	Serial Clock Input	Synchronizes all data transfers; max 20 MHz frequency defines minimum clock period (50 ns) and rise/fall time limits (≤20 ns).
7 HOLD/SIO3	Hold Control / Quad I/O	HOLD active-low suspend in SPI/SDI only; becomes SIO3 in SQI - no hold capability in quad mode per Section 3.6 and Figure 3-1.
8 VCC	Power Supply	1.7–2.2 V input; decoupling capacitor (≥100 nF) required within 5 mm of pin to suppress switching noise during page writes.

Key Features

Feature	Design Value
Triple Interface Support (SPI/SDI/SQI)	Enables scalable bandwidth: 2.5 MB/s (SPI), 5 MB/s (SDI), 10 MB/s (SQI) - eliminates need for parallel SRAM in space-constrained designs.
Zero Write Time Architecture	Eliminates write-cycle delays; data is stored immediately upon CS deassertion - critical for real-time event capture and deterministic latency.
Unlimited Endurance	Supports continuous logging or firmware patching without wear leveling - removes EEPROM-like lifetime constraints in field-upgradable devices.
Page and Sequential Modes	Page mode restricts writes to 32-byte boundaries (prevents accidental cross-page corruption); sequential mode enables full-array streaming with auto-wrap.
Industrial Temperature Validation	Guaranteed AC/DC performance across –40°C to +85°C - qualified for use in programmable logic controllers, HVAC controllers, and industrial gateways.

Applications

Industrial Data Logger	Automotive Body Controller
Use Scenario: Captures CAN bus diagnostic frames and sensor telemetry at 10 kHz sampling rate during vehicle road tests, storing raw data for post-analysis. IC Role / Device Role / Timing Role: High-speed serial buffer between microcontroller DMA engine and flash storage - absorbs burst traffic without CPU intervention. Use Value: 20 MHz SQI interface sustains 10 MB/s peak throughput, while 4 µA standby current extends battery life during parked-state monitoring.	Use Scenario: Stores seat position presets, mirror calibration offsets, and lighting profiles in entry-level automotive body control modules (BCM). IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via SPI during MCU boot - retains settings across ignition cycles without backup battery. Use Value: Unlimited write cycles eliminate wear-out concerns from frequent user adjustments; 1.7–2.2 V operation matches low-voltage MCU I/O domains.
Medical Wearable Sensor Hub	Smart Energy Meter
Use Scenario: Aggregates ECG, temperature, and motion data from multiple analog front-ends before wireless transmission to gateway. IC Role / Device Role / Timing Role: Low-power intermediate buffer enabling duty-cycled RF transmission - reduces average system current by offloading burst reads. Use Value: 3 mA active current at 2.2 V and 4 µA standby allow >2-week operation on coin-cell battery; page mode prevents partial-write corruption during interrupts.	Use Scenario: Temporarily stores 15-minute interval energy consumption logs during utility communication outages in residential smart meters. IC Role / Device Role / Timing Role: High-reliability scratchpad memory for time-stamped kWh values - survives repeated power cycling and grid transients. Use Value: Data retention down to 1.0 V ensures no loss during brown-outs; industrial temp rating covers outdoor meter enclosures exposed to solar heating.

Industrial Data Logger

Automotive Body Controller

Use Scenario: Captures CAN bus diagnostic frames and sensor telemetry at 10 kHz sampling rate during vehicle road tests, storing raw data for post-analysis.

IC Role / Device Role / Timing Role: High-speed serial buffer between microcontroller DMA engine and flash storage - absorbs burst traffic without CPU intervention.

Use Value: 20 MHz SQI interface sustains 10 MB/s peak throughput, while 4 µA standby current extends battery life during parked-state monitoring.

Use Scenario: Stores seat position presets, mirror calibration offsets, and lighting profiles in entry-level automotive body control modules (BCM).

IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via SPI during MCU boot - retains settings across ignition cycles without backup battery.

Use Value: Unlimited write cycles eliminate wear-out concerns from frequent user adjustments; 1.7–2.2 V operation matches low-voltage MCU I/O domains.

Medical Wearable Sensor Hub

Smart Energy Meter

Use Scenario: Aggregates ECG, temperature, and motion data from multiple analog front-ends before wireless transmission to gateway.

IC Role / Device Role / Timing Role: Low-power intermediate buffer enabling duty-cycled RF transmission - reduces average system current by offloading burst reads.

Use Value: 3 mA active current at 2.2 V and 4 µA standby allow >2-week operation on coin-cell battery; page mode prevents partial-write corruption during interrupts.

Use Scenario: Temporarily stores 15-minute interval energy consumption logs during utility communication outages in residential smart meters.

IC Role / Device Role / Timing Role: High-reliability scratchpad memory for time-stamped kWh values - survives repeated power cycling and grid transients.

Use Value: Data retention down to 1.0 V ensures no loss during brown-outs; industrial temp rating covers outdoor meter enclosures exposed to solar heating.

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 - but incompatible voltage domain.	Required where host MCU operates at 3.3 V or 5 V; cannot substitute directly without level-shifting or supply redesign.	Select only if system VCC ≥2.5 V and industrial temp suffices; verify HOLD/SQI behavior matches 23A1024-I/SN documentation.
IS61WV102416BLL-10MLI	Parallel 1M × 16 SRAM in 48-pin TSOP; 10 ns access time, 3.3 V only - no serial interface or low-power standby.	Suitable for legacy designs with parallel bus architecture; unsuitable for space-constrained or ultra-low-power applications.	Choose only when migrating from parallel SRAM footprint and higher power budget is acceptable; no software compatibility.

Compared with 23LC1024-I/SN, the 23A1024-I/SN enables lower-system-voltage operation critical for energy harvesting nodes, while IS61WV102416BLL-10MLI trades serial simplicity for raw speed and parallel bus compatibility - neither offers drop-in replacement capability.

Availability

23A1024-I/SN is available at Aetrix Electronics and suitable for industrial data loggers, automotive body controllers, medical wearable sensor hubs, and smart energy meters requiring stable component supply across extended product lifecycles.

Supply support for 23A1024-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, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 23A1024-I/SN belongs to Microchip's serial SRAM product line, engineered specifically for low-voltage, low-power embedded systems needing fast, reliable, and infinitely reprogrammable memory without battery backup or wear leveling overhead.

FAQ

What is the maximum clock frequency supported by the 23A1024-I/SN in Industrial temperature range?

The 23A1024-I/SN supports up to 20 MHz clock frequency when operated across the Industrial temperature range (–40°C to +85°C), as specified in Table 1-2 AC Characteristics. This applies to all interface modes - SPI, SDI, and SQI - and is validated under worst-case VCC (1.7 V) and temperature conditions.

Can the 23A1024-I/SN operate in Quad I/O (SQI) mode while retaining HOLD functionality?

No. The 23A1024-I/SN disables HOLD functionality when operating in SQI mode: pin 7 (HOLD/SIO3) becomes SIO3, and the HOLD suspend feature is unavailable per Section 3.6 and Figure 3-1. HOLD is only functional in SPI and SDI modes, and must be asserted while SCK is low to take effect.

What is the purpose of pin 3 (SIO2) on the 23A1024-I/SN, and how should it be handled in non-SQI applications?

Pin 3 (SIO2) is exclusively used for Quad I/O (SQI) mode and is not connected in SPI or SDI operation. Per Section 3.3, it must not be left floating - tie it high or low (e.g., to VCC or VSS via 10 kΩ resistor) to prevent undefined behavior and ensure robust recovery from accidental EQIO commands.

How does the 23A1024-I/SN handle address boundary crossing during Page Write mode?

In Page Write mode, the 23A1024-I/SN automatically increments the internal address pointer but wraps to the start of the same 32-byte page upon reaching the page boundary (e.g., address 0x001F → 0x0000). It does not cross into the next page, preventing unintended overwrites - a hardware-enforced safety feature confirmed in Section 2.2 and Figure 2-4.

Is the 23A1024-I/SN pin-compatible with the 23LC1024-I/SN, and can they be interchanged on the same PCB?

Yes, the 23A1024-I/SN and 23LC1024-I/SN share identical 8-lead SOIC (SN) pinout, package dimensions, and AC/DC timing specifications. However, they are not functionally interchangeable due to incompatible supply voltage ranges (1.7–2.2 V vs. 2.5–5.5 V); substituting one for the other without adjusting VCC and level-shifting I/O will cause malfunction or damage.

23A1024-I/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:: 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

23A1024-I/SN FAQ

1.How can I place an order for 23A1024-I/SN through Aetrix?

Please submit a Request for Quotation (RFQ) for 23A1024-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 23A1024-I/SN reliable?

The price and inventory of 23A1024-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 23A1024-I/SN is usually 5 days.

3.What payment methods are accepted for 23A1024-I/SN?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23A1024-I/SN transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 23A1024-I/SN?

23A1024-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 23A1024-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 23A1024-I/SN?

For technical support, including 23A1024-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23A1024-I/SN requirements.

6.How does Aetrix verify that 23A1024-I/SN is sourced from the original manufacturer or authorized distributors?

All 23A1024-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 23A1024-I/SN meets industry standards.

7.What is the process for return or replacement of 23A1024-I/SN?

All 23A1024-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 23A1024-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 23A1024-I/SN part is unused and in its original packaging.

Return procedure for 23A1024-I/SN:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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