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Microchip Technology 23LC1024T-E/ST
- Part No.:
- 23LC1024T-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
23LC1024T-E/ST.pdf
- Description:
- IC SRAM 1MBIT SPI/QUAD 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,596
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Product details
Overview
23LC1024T-E/ST 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 in automotive infotainment boot memory and real-time data buffering.
For engineers reviewing the 23LC1024T-E/ST datasheet, 23LC1024T-E/ST pinout, 23LC1024T-E/ST application, or 23LC1024T-E/ST equivalent, this page provides verified package mapping (8-lead TSSOP), validated pin functions including HOLD/SIO3 dual-role behavior, confirmed SDI/SQI mode entry/exit sequences (EDIO/EQIO/RSTIO), and real-world timing constraints for CS setup/hold, clock rise/fall, and output valid/hold windows.
Technical Context
The 23LC1024T-E/ST implements a serial SRAM architecture with an 8-bit instruction register and 24-bit address space, supporting three configurable access modes via MODE register bits: Byte (00), Page (10), and Sequential (01, default). All instructions, addresses, and data are transferred MSB-first on rising SCK edge.
It operates natively in SPI mode using SI/SO/SCK/CS, transitions to SDI mode (dual I/O) via EDIO command using SI/SO bidirectionally, and enters SQI mode (quad I/O) via EQIO command using SIO0–SIO3 - with HOLD functionality disabled in SQI mode and SIO2 requiring pull-up if unused.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (128K × 8), enabling storage of 128 KB of volatile runtime data without refresh |
| Interface Modes | SPI (4-wire), SDI (dual I/O), SQI (quad I/O); mode selection via EDIO/EQIO/RSTIO commands |
| Max Clock Rate | 20 MHz (I-temp), 16 MHz (E-temp); defines maximum sustained data throughput of 20 MB/s in SQI mode |
| Supply Voltage | 2.5–5.5 V; compatible with 3.3 V and 5 V microcontroller I/O domains without level shifting |
| Read Current | 3 mA at 5.5 V/20 MHz; determines active power budget in high-bandwidth logging applications |
| Standby Current | 4 µA at +85°C; enables ultra-low-power retention during vehicle key-off states |
| Data Retention Voltage | 1.0 V minimum; guarantees RAM data integrity during brown-out conditions down to 1.0 V VCC |
Pinout & Package
8-lead TSSOP (4.4 mm body width), RoHS-compliant, moisture-sensitive level 3 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select Input | Active-low enable; forces device into high-impedance standby when high, required for multi-drop SPI bus sharing |
| 2 SO/SIO1 | Serial Output / SDI/SQI I/O 1 | Tri-states on CS high or HOLD low; bidirectional in SDI/SQI modes; outputs data after SCK falling edge in SPI |
| 3 SIO2 | Serial I/O 2 (SQI only) | Unused in SPI/SDI modes; must be pulled high if not used in SQI to ensure reliable RSTIO recovery |
| 4 VSS | Ground Reference | Primary return path for all I/O and core logic; requires low-inductance connection to minimize noise coupling |
| 5 SI/SIO0 | Serial Input / SDI/SQI I/O 0 | Latches data on SCK rising edge in SPI; bidirectional in SDI/SQI; must be driven or terminated in all modes |
| 6 SCK | Serial Clock Input | Synchronizes all data transfers; rising edge latches input, falling edge updates output; max 20 MHz (I), 16 MHz (E) |
| 7 HOLD/SIO3 | Hold Control / SQI I/O 3 | HOLD active-low suspend in SPI/SDI; disabled in SQI mode where pin becomes bidirectional I/O |
| 8 VCC | Power Supply | 2.5–5.5 V operation; decoupling capacitor (0.1 µF) required within 5 mm of pin for stable high-speed timing |
Key Features
| Feature | Design Value |
|---|---|
| Unlimited Read/Write Cycles | Enables continuous data logging in telematics ECUs without wear-out concerns over product lifetime |
| Zero Write Time | Eliminates wait states during firmware updates or configuration writes, improving system responsiveness |
| Page Mode (32-byte pages) | Reduces command overhead for burst transfers - e.g., 32-byte CAN message buffers written in single transaction |
| SDI/SQI Interface Support | Doubles (SDI) or quadruples (SQI) effective bandwidth vs. standard SPI, critical for high-frame-rate display buffers |
| Automotive Temperature Range | Validated operation from -40°C to +125°C ambient, meeting AEC-Q100 stress test requirements for under-hood use |
Applications
| Automotive Infotainment Boot Memory | Industrial PLC Data Logging Buffer |
|---|---|
Use Scenario: Stores boot code and UI assets for head-unit MCU during cold start, accessed before main OS loads. IC Role / Device Role / Timing Role: SPI slave SRAM providing fast, deterministic read access to 128 KB of non-volatile-equivalent boot image. Use Value: 20 MHz SPI clock enables sub-10 ms load time for 128 KB firmware; E-temp rating ensures reliability in dashboard environments. | Use Scenario: Captures sensor readings (temperature, pressure, vibration) at 1 kHz for 128 seconds before transmission. IC Role / Device Role / Timing Role: High-reliability buffer holding sequential samples with zero write latency between captures. Use Value: Unlimited write cycles prevent degradation over 10+ years of field operation; 4 µA standby draws <1 µW during idle intervals. |
| Medical Diagnostic Imaging FIFO | Avionics Sensor Fusion Cache |
Use Scenario: Temporarily stores raw pixel data from ultrasound transducer array before DSP processing. IC Role / Device Role / Timing Role: Burst-mode SRAM acting as first-in-first-out pipeline between analog front-end and FPGA accelerator. Use Value: Sequential read/write mode enables continuous streaming at 20 MB/s (SQI), matching real-time imaging frame rates. | Use Scenario: Aggregates inertial measurement unit (IMU), GPS, and barometer data for Kalman filter computation in flight control units. IC Role / Device Role / Timing Role: Low-latency shared memory for time-critical sensor fusion algorithms running on dual-core ARM Cortex-R5. Use Value: HOLD pin allows deterministic pause/resume of data transfers during interrupt servicing, preserving sample alignment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY14V101QS-SXIT | 1 Mbit nvSRAM with integrated lithium battery backup; 3.0–3.6 V only; no SQI support | Used where data retention during power loss is mandatory (e.g., black box recorders) | Select when non-volatility is required; avoid if cost-sensitive or wide-VCC needed |
| IS66WV1M8ALL-150BLLI | 1 Mbit parallel SRAM; 3.3 V only; 15 ns access time; no serial interface | Deployed in legacy designs with parallel bus architecture and tight timing budgets | Select only for drop-in replacement in existing parallel-SRAM PCBs; requires full interface redesign otherwise |
Compared with CY14V101QS-SXIT, the 23LC1024T-E/ST offers wider voltage range and quad-I/O speed but lacks on-chip non-volatility; compared with IS66WV1M8ALL-150BLLI, it reduces pin count and board space by 75% but trades off nanosecond-level random access for serial throughput efficiency.
Availability
23LC1024T-E/ST is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial programmable logic controllers, medical diagnostic equipment, and avionics subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 23LC1024T-E/ST 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, serving automotive, industrial, consumer, and communications markets with vertically integrated silicon and software platforms.
The 23LC1024T-E/ST belongs to Microchip's serial SRAM product line, designed specifically for high-reliability, low-power, SPI-compatible memory expansion in resource-constrained embedded systems where pin count, power, and temperature robustness are critical.
FAQ
What is the maximum clock frequency supported by the 23LC1024T-E/ST in automotive temperature range?
The 23LC1024T-E/ST supports a maximum clock frequency of 16 MHz when operating across the full automotive temperature range (-40°C to +125°C), as specified in Table 1-2 AC Characteristics. This limit applies to all interface modes - SPI, SDI, and SQI - and is derated from the 20 MHz rating valid for industrial temperature range only. The 23LC1024T-E/ST maintains full functionality at 16 MHz, including all instruction sets and timing parameters.
Does the 23LC1024T-E/ST support Quad SPI (QSPI) mode, and how is it enabled?
Yes, the 23LC1024T-E/ST supports Serial Quad Interface (SQI) mode, which is distinct from JEDEC-standard QSPI but functionally equivalent for quad-data-line operation. It is enabled by issuing the EQIO command (0x38) via the SPI interface while the device is selected. In SQI mode, pins SIO0–SIO3 become bidirectional data lines, allowing four bits per clock cycle. The HOLD function is disabled in this mode, and SIO2 must be actively managed - pulled high if unused - to ensure reliable RSTIO recovery.
What is the purpose of the HOLD pin on the 23LC1024T-E/ST, and does it work in all interface modes?
The HOLD pin on the 23LC1024T-E/ST suspends ongoing serial communication without resetting the internal address counter or losing state, enabling deterministic pause/resume during interrupt handling. It functions only in SPI and SDI modes: pulling HOLD low while SCK is low halts data transfer immediately, and bringing it high resumes from the exact point of suspension. HOLD is disabled in SQI mode, where the pin becomes SIO3 - a bidirectional data line - and cannot be used for hold functionality.
How does the 23LC1024T-E/ST handle power loss, and what is its data retention voltage?
During power loss, the 23LC1024T-E/ST retains stored data as long as VCC remains ≥1.0 V, per parameter D011 (VDR) in the DC Characteristics table. Below this threshold, data is not guaranteed. Unlike nvSRAM, it has no internal backup power source; external circuitry (e.g., supercapacitor or backup battery) must maintain VCC above 1.0 V for retention. The 23LC1024T-E/ST does not perform automatic data save-on-power-loss - retention is purely voltage-dependent and transient.
Can the 23LC1024T-E/ST be used interchangeably with the 23A1024 variant in the same design?
No, the 23LC1024T-E/ST and 23A1024 are not interchangeable due to incompatible supply voltage ranges: 23LC1024T-E/ST requires 2.5–5.5 V, while 23A1024 operates at 1.7–2.2 V. Their pinouts and instruction sets are identical, but direct substitution would cause overvoltage damage to the 23A1024 or undervoltage failure of the 23LC1024T-E/ST. Both share the same 8-lead TSSOP package (ST suffix), but voltage domain mismatch makes them electrically incompatible without level-shifting circuitry.
23LC1024T-E/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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-TSSOP
23LC1024T-E/ST FAQ
1.How can I place an order for 23LC1024T-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 23LC1024T-E/ST 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/ST reliable?
The price and inventory of 23LC1024T-E/ST 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/ST is usually 5 days.
3.What payment methods are accepted for 23LC1024T-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23LC1024T-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 23LC1024T-E/ST?
23LC1024T-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 23LC1024T-E/ST 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/ST?
For technical support, including 23LC1024T-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23LC1024T-E/ST requirements.
6.How does Aetrix verify that 23LC1024T-E/ST is sourced from the original manufacturer or authorized distributors?
All 23LC1024T-E/ST 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/ST meets industry standards.
7.What is the process for return or replacement of 23LC1024T-E/ST?
All 23LC1024T-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 23LC1024T-E/ST, 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/ST part is unused and in its original packaging.
Return procedure for 23LC1024T-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
23LC1024T-E/ST Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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