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

Microchip Technology 23A512-I/P

Name: 23A512-I/P
Brand: Microchip Technology
SKU: 23A512-I/P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 23A512-I/P

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 8-DIP (0.300", 7.62mm)

Datasheet:: 23A512-I/P.pdf

Description:: IC SRAM 512KBIT SPI/QUAD 8DIP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

23A512-I/P from Microchip Technology is a 512-Kbit SPI Serial SRAM with SDI/SQI interface, operating at 1.7V–2.2V supply and supporting Industrial temperature range (−40°C to +85°C). 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 in microcontroller-based data buffering and real-time logging systems.

For engineers reviewing the 23A512-I/P datasheet, 23A512-I/P pinout, 23A512-I/P application, or 23A512-I/P equivalent, key selection criteria include low-voltage operation (1.7–2.2 V), dual/quad I/O support for bandwidth scaling, zero write time, unlimited endurance, and PDIP-8 package compatibility with legacy through-hole designs.

Technical Context

The 23A512-I/P implements a serial SRAM architecture with SPI-compatible command set (READ 0x03, WRITE 0x02), MODE register (bits 7:6 control Byte/Page/Sequential mode), and configurable I/O modes: standard SPI (SI/SO), SDI (SIO0/SIO1), or SQI (SIO0–SIO3). It supports MSB-first data transfer and automatic address incrementing across all modes.

Its functional behavior includes HOLD pin suspension (active-low, requires SCK low assertion), CS-controlled standby entry, and power-on default to Sequential mode. The device lacks internal write protection but relies on external host control for memory access sequencing and mode switching via EDIO/EQIO/RSTIO instructions.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	512 Kbit (64K × 8-bit) - provides 65,536 bytes of volatile RAM accessible via serial interface.
Supply Voltage	1.7 V to 2.2 V - enables direct integration with low-voltage microcontrollers and battery-powered systems.
Max Clock Frequency	20 MHz (Industrial temp) - supports up to 2.5 MB/s raw throughput in SPI mode; reduced to 16 MHz in Extended temp.
Read Current	3 mA at 5.5 V, 20 MHz - measured under worst-case voltage and speed; actual draw at 2.2 V is lower per DC specs.
Standby Current	4 µA at +85°C - ensures ultra-low power retention during host sleep cycles without data loss.
Data Retention Voltage	1.0 V minimum - guarantees RAM contents persist down to 1.0 V VCC, critical for brown-out recovery.
Page Size	32 bytes - defines maximum burst length per write cycle in Page mode; limits intra-page address wrap.

Pinout & Package

23A512-I/P uses an 8-Lead PDIP (Plastic Dual In-Line Package) with 300-mil body width, through-hole mounting, and standard 0.100" pitch. Pin 1 is marked by notch or dot; leads are tin-plated, RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
CS	Chip Select Input	Active-low enable; forces device into Standby (high-Z SO) when high; required to initiate any operation.
SO/SIO1	Serial Output / SDI/SQI Data Line	Tri-state output in SPI mode; shares function with SIO1 in SDI/SQI; outputs data after SCK falling edge.
SIO2	SQI Data Line	Dedicated quad-input pin; active only in SQI mode; unused and must not float in SPI/SDI configurations.
VSS	Ground Reference	Primary return path for all I/O and core logic; requires low-impedance connection to system GND plane.
SI/SIO0	Serial Input / SDI/SQI Data Line	Input for commands, addresses, and data in SPI mode; shares function with SIO0 in SDI/SQI; latched on SCK rising edge.
SCK	Serial Clock Input	Synchronizes all data transfers; rising edge clocks SI, falling edge updates SO; timing critical for AC compliance.
HOLD/SIO3	Hold Control / SQI Data Line	Pauses ongoing serial sequence without resetting address pointer; disabled in SQI mode due to pin reuse.
VCC	Power Supply	1.7–2.2 V nominal; bypass capacitor (0.1 µF ceramic) required near pin for noise suppression and transient response.

Key Features

Feature	Design Value
SPI/SDI/SQI Tri-Mode Interface	Enables bandwidth scalability: SPI (1-bit/clock), SDI (2-bit/clock), SQI (4-bit/clock); selected via EDIO/EQIO commands.
Zero Write Time	No internal write cycle delay; data is stored immediately upon CS deassertion - eliminates polling or timeout waits.
Unlimited Read/Write Endurance	Guaranteed infinite cycles - eliminates wear-leveling firmware overhead and enables true SRAM-like usage models.
Three Addressing Modes	Byte (1-byte), Page (≤32-byte), and Sequential (full array) modes controlled by MODE register bits 7:6.
HOLD Pin Functionality	Allows mid-sequence pause/resume without address pointer reset - essential for interrupt-driven host systems.

Applications

Industrial Data Logger	Medical Sensor Hub
Use Scenario: Continuous acquisition of analog sensor data (e.g., temperature, pressure) at 1 kHz with timestamping and local buffering before USB/UART upload. IC Role / Device Role / Timing Role: Volatile high-speed buffer between ADC controller and host MCU; absorbs burst writes while host processes prior blocks. Use Value: 20 MHz SPI interface sustains 2.5 MB/s peak write rate; 32-byte page mode aligns with typical sensor packet sizes; low 4 µA standby extends battery life between uploads.	Use Scenario: Real-time aggregation of ECG, SpO₂, and respiration signals in portable diagnostic device with intermittent wireless transmission. IC Role / Device Role / Timing Role: Temporary storage for waveform segments during RF transmission gaps; retains data during MCU deep-sleep cycles. Use Value: 1.0 V data retention voltage ensures integrity during brown-out events; Industrial temp rating supports operation inside sealed enclosures; unlimited endurance avoids degradation over multi-year device lifetime.
Automotive Body Control Module	POS Terminal Memory Cache
Use Scenario: Storing configuration flags, fault logs, and calibration offsets in 12 V automotive systems with wide input voltage regulation. IC Role / Device Role / Timing Role: Nonvolatile-equivalent scratchpad memory accessed via CAN-connected MCU's SPI peripheral. Use Value: 1.7–2.2 V supply range matches LDO output from automotive PMICs; HOLD pin enables deterministic response to CAN interrupt latency; RoHS-compliant PDIP fits legacy PCB layouts.	Use Scenario: Caching transaction receipts and encryption keys in retail point-of-sale terminals with frequent power cycling. IC Role / Device Role / Timing Role: Fast-access working memory for cryptographic operations and receipt generation, decoupled from slower flash storage. Use Value: Zero write time eliminates transaction stall; 20 MHz clock enables sub-millisecond receipt assembly; PDIP-8 simplifies rework and field replacement in cost-sensitive designs.

Industrial Data Logger

Medical Sensor Hub

Use Scenario: Continuous acquisition of analog sensor data (e.g., temperature, pressure) at 1 kHz with timestamping and local buffering before USB/UART upload.

IC Role / Device Role / Timing Role: Volatile high-speed buffer between ADC controller and host MCU; absorbs burst writes while host processes prior blocks.

Use Value: 20 MHz SPI interface sustains 2.5 MB/s peak write rate; 32-byte page mode aligns with typical sensor packet sizes; low 4 µA standby extends battery life between uploads.

Use Scenario: Real-time aggregation of ECG, SpO₂, and respiration signals in portable diagnostic device with intermittent wireless transmission.

IC Role / Device Role / Timing Role: Temporary storage for waveform segments during RF transmission gaps; retains data during MCU deep-sleep cycles.

Use Value: 1.0 V data retention voltage ensures integrity during brown-out events; Industrial temp rating supports operation inside sealed enclosures; unlimited endurance avoids degradation over multi-year device lifetime.

Automotive Body Control Module

POS Terminal Memory Cache

Use Scenario: Storing configuration flags, fault logs, and calibration offsets in 12 V automotive systems with wide input voltage regulation.

IC Role / Device Role / Timing Role: Nonvolatile-equivalent scratchpad memory accessed via CAN-connected MCU's SPI peripheral.

Use Value: 1.7–2.2 V supply range matches LDO output from automotive PMICs; HOLD pin enables deterministic response to CAN interrupt latency; RoHS-compliant PDIP fits legacy PCB layouts.

Use Scenario: Caching transaction receipts and encryption keys in retail point-of-sale terminals with frequent power cycling.

IC Role / Device Role / Timing Role: Fast-access working memory for cryptographic operations and receipt generation, decoupled from slower flash storage.

Use Value: Zero write time eliminates transaction stall; 20 MHz clock enables sub-millisecond receipt assembly; PDIP-8 simplifies rework and field replacement in cost-sensitive designs.

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/P	Wider VCC range (2.5–5.5 V); same pinout, timing, and instruction set; no voltage-level translation needed for 3.3/5 V systems.	Preferred where host operates at 3.3 V or 5 V; unsuitable for sub-2.2 V battery rails.	Select 23LC512-I/P if system VCC ≥ 2.5 V and higher noise margin or legacy 5 V compatibility is required.
23K256-I/P	256 Kbit density (32K × 8); identical 1.7–2.2 V range, PDIP-8 package, and AC/DC specs - but half the capacity.	Used where memory footprint or BOM cost reduction outweighs capacity needs; compatible drop-in for smaller buffers.	Choose 23K256-I/P when application requires ≤32 KB and board space or unit cost optimization is critical.

Compared with 23LC512-I/P, the 23A512-I/P enables lower-voltage operation at the expense of higher supply sensitivity; versus 23K256-I/P, it doubles buffer depth without changing layout or firmware interface - making it optimal for high-fidelity data capture where capacity and voltage constraints coexist.

Availability

23A512-I/P is available at Aetrix Electronics and suitable for industrial data loggers, medical sensor hubs, automotive body control modules, POS terminal memory caches, and embedded instrumentation requiring stable component supply across long production lifecycles.

Supply support for 23A512-I/P 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 23A512-I/P belongs to Microchip's serial SRAM product line, engineered specifically for low-voltage, high-reliability embedded systems needing fast, endurance-critical volatile memory with minimal pin count and flexible I/O scaling.

FAQ

What is the operating voltage range for the 23A512-I/P?

The 23A512-I/P operates from 1.7 V to 2.2 V, as specified in the Device Selection Table and DC Characteristics section. This narrow range targets low-power, battery-operated, or energy-harvesting systems. Operation outside this window - including at 2.5 V - is not guaranteed and may cause functional failure or data corruption. The 23LC512-I/P variant supports 2.5–5.5 V for broader compatibility.

Does the 23A512-I/P support Quad SPI (QSPI) mode?

Yes, the 23A512-I/P supports Serial Quad Interface (SQI) mode using pins SIO0–SIO3, enabled via the EQIO command (0x38). In SQI mode, four bits are transferred per clock cycle, doubling bandwidth versus SDI and quadrupling versus standard SPI. Note that HOLD functionality is disabled in SQI mode due to pin sharing, and pin 3 (SIO2) must be actively driven - not left floating.

How does the HOLD pin function on the 23A512-I/P?

The HOLD pin on the 23A512-I/P suspends ongoing serial communication without resetting the internal address pointer or command state. To activate, pull HOLD low while SCK is low; SO immediately tri-states. Resume by pulling HOLD high while SCK remains low. HOLD is unavailable in SQI mode. Its purpose is deterministic interruption handling in interrupt-driven hosts - avoiding full retransmission of commands and addresses.

What package type is used for the 23A512-I/P?

The 23A512-I/P uses an 8-Lead Plastic Dual In-Line Package (PDIP) with 300-mil body width, designated by the "P" suffix in the part number. It features through-hole mounting, 0.100" lead pitch, and RoHS-compliant matte tin plating. Package drawings confirm dimensions per Microchip Drawing No. C04-018-P Rev E, including lead width (0.014–0.022"), thickness (0.008–0.015"), and overall length (0.348–0.400").

Is the 23A512-I/P pin-compatible with the 23LC512-I/P?

Yes, the 23A512-I/P and 23LC512-I/P share identical pinout, package footprint, instruction set, timing parameters, and AC/DC electrical specifications - differing only in VCC range (1.7–2.2 V vs. 2.5–5.5 V) and temperature grade labeling. They are mechanically and electrically interchangeable on PCBs, provided the host system's supply voltage falls within the selected device's operational range.

23A512-I/P Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 8-DIP (0.300", 7.62mm)

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:: 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:: Through Hole

Supplier Device Package:: 8-PDIP

23A512-I/P FAQ

1.How can I place an order for 23A512-I/P through Aetrix?

Please submit a Request for Quotation (RFQ) for 23A512-I/P 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-I/P reliable?

The price and inventory of 23A512-I/P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 23A512-I/P is usually 5 days.

3.What payment methods are accepted for 23A512-I/P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23A512-I/P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 23A512-I/P?

23A512-I/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 23A512-I/P 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-I/P?

For technical support, including 23A512-I/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23A512-I/P requirements.

6.How does Aetrix verify that 23A512-I/P is sourced from the original manufacturer or authorized distributors?

All 23A512-I/P 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-I/P meets industry standards.

7.What is the process for return or replacement of 23A512-I/P?

All 23A512-I/P units undergo pre-shipment inspection (PSI). If there is an issue with 23A512-I/P, 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-I/P part is unused and in its original packaging.

Return procedure for 23A512-I/P:

1.Submit a request within 90 days.

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

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