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Microchip Technology 23LC1024T-E/SN

Name: 23LC1024T-E/SN
Brand: Microchip Technology
SKU: 23LC1024T-E/SN
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 23LC1024T-E/SN

Manufacturer:: Microchip Technology

Category:: Memory

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

Datasheet:: 23LC1024T-E/SN.pdf

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

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Product details

Overview

23LC1024T-E/SN from Microchip Technology is a 1 Mbit (128K × 8) SPI Serial SRAM with SDI and SQI interface support, operating across 2.5–5.5 V supply and −40°C to +125°C automotive temperature range. It delivers 20 MHz clock rate in SPI/SDI modes (16 MHz in E-temp), 3 mA read current at 5.5 V/20 MHz, 4 µA standby current at +85°C, and supports byte/page/sequential read/write with zero write time - used for real-time data buffering in automotive infotainment and industrial PLCs.

For engineers reviewing the 23LC1024T-E/SN datasheet, 23LC1024T-E/SN pinout, 23LC1024T-E/SN application, or 23LC1024T-E/SN equivalent, key selection criteria include its extended-temperature SOIC-8 packaging, quad/dual I/O capability, unlimited endurance, and compatibility with PIC® and ARM-based microcontrollers requiring fast, nonvolatile-like SRAM access without battery backup.

Technical Context

The 23LC1024T-E/SN implements a serial peripheral interface with three configurable bus modes: standard SPI (single I/O), SDI (dual I/O using SI/SO bidirectionally), and SQI (quad I/O using SIO0–SIO3). Its internal 24-bit address counter enables automatic incrementing in page (32-byte boundary) and sequential (full array wraparound) modes, while the MODE register (bits 7–6) selects operation mode at runtime.

It features dedicated HOLD functionality in SPI/SDI modes for pausing transfers mid-sequence without reset, but HOLD is disabled in SQI mode where SIO3 becomes an active I/O pin. The device powers on in standby (CS high), requires CS low to initiate any command, and supports instruction set including READ (0x03), WRITE (0x02), EDIO (0x3B), EQIO (0x38), RSTIO (0xFF), RDMR (0x05), and WRMR (0x01).

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	1 Mbit (128K × 8 bits); provides sufficient buffer space for firmware logging or sensor stream aggregation in resource-constrained systems.
Supply Voltage	2.5–5.5 V; compatible with both 3.3 V and 5 V microcontroller I/O domains without level shifting.
Max Clock Frequency	20 MHz (SPI/SDI), 16 MHz (SQI, E-temp); enables up to 2.5 MB/s effective throughput in quad mode.
Read Current	3 mA at 5.5 V / 20 MHz; enables low-power active operation in always-on automotive modules.
Standby Current	4 µA at +85°C; supports ultra-low-power sleep states in battery-backed or energy-harvested edge nodes.
Data Retention Voltage	1.0 V minimum; guarantees RAM data integrity during brown-out conditions down to near-threshold supply levels.
Endurance	Unlimited read/write cycles; eliminates wear-out concerns in high-frequency data logging applications.

Pinout & Package

23LC1024T-E/SN is packaged in an 8-lead SOIC (SN) with 3.90 mm body width, RoHS-compliant matte tin plating, and tape-and-reel delivery (T suffix). Pinout matches industry-standard SPI layout with dual/quad I/O expansion capability.

Pin/Terminal	Circuit Role	Design Meaning
1: CS	Chip Select Input	Active-low enable; places device in standby (high-Z SO) when deasserted, enabling multi-drop SPI bus sharing.
2: SO/SIO1	Serial Output / SDI/SQI I/O	Tri-state output in SPI; bidirectional data lane in SDI/SQI; latched on SCK rising edge (input), updated after falling edge (output).
3: SIO2	Serial I/O 2 (SQI only)	Unused in SPI/SDI; must be pulled high or tied to VCC if not used in SQI mode to prevent bus lockup.
4: VSS	Ground Reference	Primary return path for all I/O and core logic; requires low-impedance PCB connection to minimize noise coupling.
5: SI/SIO0	Serial Input / SDI/SQI I/O	Command/address/data input in SPI; bidirectional lane in SDI/SQI; sampled on SCK rising edge.
6: SCK	Serial Clock Input	Synchronizes all data transfers; rising edge clocks inputs, falling edge updates outputs; max 20 MHz rating.
7: HOLD/SIO3	Hold Control / SQI I/O	HOLD active-low suspend in SPI/SDI; becomes SIO3 in SQI mode; must be held high unless actively pausing transfers.
8: VCC	Power Supply	2.5–5.5 V tolerant; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin per layout guidelines.

Key Features

Feature	Design Value
Quad I/O (SQI) Interface	Enables 4-bit-per-clock transfers via SIO0–SIO3, doubling bandwidth over SDI and quadrupling over SPI - critical for high-speed firmware update staging.
Zero Write Time Architecture	Eliminates write latency; data is stored immediately upon CS high assertion - essential for deterministic real-time control buffering.
Page Write Mode (32-byte)	Allows burst writes within fixed 32-byte boundaries; reduces command overhead vs. byte mode and prevents accidental cross-page corruption.
Automotive Temperature Range	Rated for −40°C to +125°C ambient; qualified for under-hood and display module use without derating or thermal management.
Unlimited Endurance	No wear leveling or refresh required; supports continuous logging in telematics gateways without lifetime degradation concerns.

Applications

Automotive Infotainment Buffer	Industrial PLC Data Logger
Use Scenario: Storing decoded audio frames and UI state variables in head unit systems with intermittent power loss risk. IC Role / Device Role / Timing Role: High-speed SRAM acting as volatile frame buffer between DSP and display controller, accessed via SPI from MCU. Use Value: 20 MHz SPI + zero write time ensures glitch-free audio playback during rapid menu navigation and system wake-up transitions.	Use Scenario: Capturing sensor timestamps and analog readings in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Dedicated data scratchpad for cyclic acquisition buffers, written in sequential mode and read out via UART/USB host. Use Value: Unlimited endurance and 4 µA standby current enable years of unattended operation with minimal power budget impact.
Medical Diagnostic Imaging Cache	Smart Meter Firmware Update Staging
Use Scenario: Temporary storage of compressed image tiles during ultrasound scan processing before DRAM transfer. IC Role / Device Role / Timing Role: Low-latency memory extension for FPGA-based image pipeline, interfaced via SQI for maximum throughput. Use Value: 16 MHz SQI mode delivers >6 MB/s effective bandwidth, reducing tile load latency by 65% versus SPI-only alternatives.	Use Scenario: Holding validated firmware images prior to secure flash programming in utility smart meters with strict power cycling constraints. IC Role / Device Role / Timing Role: Secure, fast-access staging area for OTA update payloads, isolated from main application memory space. Use Value: 2.5–5.5 V operation allows direct connection to meter's 3.3 V or 5 V rail; no additional regulators needed for update subsystem.

Automotive Infotainment Buffer

Industrial PLC Data Logger

Use Scenario: Storing decoded audio frames and UI state variables in head unit systems with intermittent power loss risk.

IC Role / Device Role / Timing Role: High-speed SRAM acting as volatile frame buffer between DSP and display controller, accessed via SPI from MCU.

Use Value: 20 MHz SPI + zero write time ensures glitch-free audio playback during rapid menu navigation and system wake-up transitions.

Use Scenario: Capturing sensor timestamps and analog readings in programmable logic controllers deployed in factory automation lines.

IC Role / Device Role / Timing Role: Dedicated data scratchpad for cyclic acquisition buffers, written in sequential mode and read out via UART/USB host.

Use Value: Unlimited endurance and 4 µA standby current enable years of unattended operation with minimal power budget impact.

Medical Diagnostic Imaging Cache

Smart Meter Firmware Update Staging

Use Scenario: Temporary storage of compressed image tiles during ultrasound scan processing before DRAM transfer.

IC Role / Device Role / Timing Role: Low-latency memory extension for FPGA-based image pipeline, interfaced via SQI for maximum throughput.

Use Value: 16 MHz SQI mode delivers >6 MB/s effective bandwidth, reducing tile load latency by 65% versus SPI-only alternatives.

Use Scenario: Holding validated firmware images prior to secure flash programming in utility smart meters with strict power cycling constraints.

IC Role / Device Role / Timing Role: Secure, fast-access staging area for OTA update payloads, isolated from main application memory space.

Use Value: 2.5–5.5 V operation allows direct connection to meter's 3.3 V or 5 V rail; no additional regulators needed for update subsystem.

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	Same die, industrial temp range (−40°C to +85°C); identical electrical specs except E-temp AC timing reduced to 16 MHz.	Not qualified for under-hood automotive use; suitable for indoor industrial or consumer electronics.	Select when cost sensitivity outweighs extended temperature requirement and board-level thermal design stays within I-temp limits.
IS66WV1M8ALL-15MLI	Parallel-interface 1 Mbit SRAM (8-bit bus); 15 ns access time; 3.3 V only; no serial protocol support.	Requires 24+ pins and dedicated address/data bus; incompatible with SPI-based MCU designs.	Choose only when migrating from legacy parallel-SRAM architecture and PCB layout permits full bus routing.

Compared with 23LC1024-I/SN, the 23LC1024T-E/SN adds automotive qualification and maintains full 20 MHz performance at high temperature; compared with IS66WV1M8ALL-15MLI, it trades pin count and speed for SPI simplicity and board-space efficiency in microcontroller-centric systems.

Availability

23LC1024T-E/SN is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLCs, medical imaging subsystems, and smart meter firmware staging requiring stable component supply across extended temperature and long production lifecycles.

Supply support for 23LC1024T-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 microcontroller, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.

The 23LC1024T-E/SN belongs to Microchip's serial SRAM product line, engineered for seamless integration into SPI-capable microcontroller systems needing fast, reliable, low-power volatile memory without battery backup or complex initialization sequences.

FAQ

What is the maximum clock frequency supported by the 23LC1024T-E/SN in automotive temperature range?

The 23LC1024T-E/SN supports up to 16 MHz in SQI mode and 20 MHz in SPI/SDI modes across its full −40°C to +125°C automotive temperature range. This is explicitly specified in Table 1-2 (AC Characteristics) of the DS20005142C datasheet, where E-temp timing parameters are annotated separately and confirmed for all operational modes.

Does the 23LC1024T-E/SN require external pull-up resistors on its I/O pins?

No, the 23LC1024T-E/SN does not require external pull-ups on SI, SO, SCK, or CS for basic SPI operation. Internal weak pull-downs exist on CS and HOLD, but functional operation relies on active driving from the master MCU. Pull-ups may be added on SIO2 (pin 3) in non-SQI designs per Section 3.3 to ensure safe recovery from accidental EQIO commands.

Can the 23LC1024T-E/SN retain data during brief power interruptions?

Yes - the 23LC1024T-E/SN guarantees data retention down to 1.0 V VCC (per D011 in Table 1-1), allowing it to hold valid SRAM contents through brown-out events typical in automotive 12 V systems with transient dips. However, it is volatile memory and requires continuous power for indefinite retention; no onboard capacitor or backup source is included.

Is the 23LC1024T-E/SN pin-compatible with the 23A1024 series?

No - while the 23LC1024T-E/SN shares identical pinout and package (SOIC-8 SN), it is not pin-compatible with the 23A1024 series due to differing VCC ranges (2.5–5.5 V vs. 1.7–2.2 V) and incompatible input threshold voltages (VIL = 0.1×VCC for 23LC1024 vs. 0.2×VCC for 23A1024). Interchangeability would risk logic-level misinterpretation and functional failure.

How does HOLD functionality behave when the 23LC1024T-E/SN is in SQI mode?

HOLD functionality is disabled in SQI mode - pin 7 (HOLD/SIO3) becomes SIO3, an active bidirectional data line. The HOLD feature is only available in SPI and SDI modes, as stated in Section 3.6 and Figure 3-1. Attempting to assert HOLD during SQI operation will disrupt data transfer and may corrupt the bus state.

23LC1024T-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:: 1Mbit

Memory Organization:: 128K x 8

Memory Interface:: SPI - Quad I/O

Clock Frequency:: 16 MHz

Write Cycle Time - Word, Page:: -

Access Time:: -

Voltage - Supply:: 2.5V ~ 5.5V

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

23LC1024T-E/SN FAQ

1.How can I place an order for 23LC1024T-E/SN through Aetrix?

Please submit a Request for Quotation (RFQ) for 23LC1024T-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 23LC1024T-E/SN reliable?

The price and inventory of 23LC1024T-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 23LC1024T-E/SN is usually 5 days.

3.What payment methods are accepted for 23LC1024T-E/SN?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23LC1024T-E/SN transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 23LC1024T-E/SN?

23LC1024T-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 23LC1024T-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 23LC1024T-E/SN?

For technical support, including 23LC1024T-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23LC1024T-E/SN requirements.

6.How does Aetrix verify that 23LC1024T-E/SN is sourced from the original manufacturer or authorized distributors?

All 23LC1024T-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 23LC1024T-E/SN meets industry standards.

7.What is the process for return or replacement of 23LC1024T-E/SN?

All 23LC1024T-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 23LC1024T-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 23LC1024T-E/SN part is unused and in its original packaging.

Return procedure for 23LC1024T-E/SN:

1.Submit a request within 90 days.

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

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