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Microchip Technology 23A1024-E/SN
- Part No.:
- 23A1024-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
23A1024-E/SN.pdf
- Description:
- IC SRAM 1MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,025
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Product details
Overview
23A1024-E/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 +125°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 automotive infotainment and engine control units.
For engineers reviewing the 23A1024-E/SN datasheet, 23A1024-E/SN pinout, 23A1024-E/SN application, or 23A1024-E/SN equivalent, key selection criteria include its extended-temperature operation, quad/dual I/O capability for bandwidth scaling, zero write time, unlimited endurance, and compatibility with PIC® MCU SPI peripherals.
Technical Context
The 23A1024-E/SN implements a serial SRAM architecture with three configurable access modes-Byte, Page (32-byte), and Sequential-controlled via a writable MODE register. Its command set includes READ (0x03), WRITE (0x02), EDIO (0x3B), EQIO (0x38), and RSTIO (0xFF), enabling dynamic bus mode switching between SPI, SDI, and SQI without reset.
It supports full-duplex SDI (SIO0/SIO1) and quad-duplex SQI (SIO0–SIO3) operation, with HOLD functionality active only in SPI/SDI modes. The device powers on in Standby mode (CS = high), requires no external refresh, and retains data down to 1.0 V VCC during brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (128K × 8 bits); supports byte/page/sequential reads/writes with automatic address increment |
| Supply Voltage | 1.7–2.2 V; enables direct integration with 1.8 V logic systems and automotive low-voltage domains |
| Max Clock Frequency | 20 MHz (I-temp), 16 MHz (E-temp); sustains high-throughput data streaming in real-time control loops |
| Read Current | 3 mA at 2.2 V, 20 MHz; minimizes active power draw in battery-backed or energy-constrained modules |
| Standby Current | 4 µA at +85°C; ensures ultra-low quiescent consumption during ECU sleep states |
| Data Retention Voltage | 1.0 V minimum; guarantees RAM contents survive deep brownout events common in vehicle power systems |
| Endurance & Retention | Unlimited read/write cycles; data retention >20 years at +85°C per JEDEC JESD22-A117 |
Pinout & Package
8-lead SOIC (SN) package, 3.90 mm body width, RoHS-compliant matte tin finish, JEDEC MS-012AC standard footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low enable; forces Standby mode when high; required for all operations |
| SO/SIO1 | Serial Output / SDI/SQI Bidirectional I/O | Outputs data in SPI mode; bidirectional in SDI/SQI; tri-states immediately on HOLD assertion |
| SIO2 | SQI Bidirectional I/O | Used only in SQI mode; must be pulled high if unused to prevent accidental mode lock |
| VSS | Ground Reference | Primary return path for all digital and I/O currents; requires low-impedance PCB connection |
| SI/SIO0 | Serial Input / SDI/SQI Bidirectional I/O | Accepts commands/addresses/data in SPI mode; bidirectional in SDI/SQI |
| SCK | Serial Clock Input | Synchronizes all data transfers; latches SI on rising edge, updates SO on falling edge |
| HOLD/SIO3 | Hold Control / SQI Bidirectional I/O | Suspends ongoing SPI/SDI transfer without resetting sequence; disabled in SQI mode |
| VCC | Power Supply | 1.7–2.2 V input; decoupling capacitor (0.1 µF) required within 5 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Quad I/O (SQI) Interface | Enables 4-bit-per-clock data transfer, doubling bandwidth vs. SPI and matching microcontroller QSPI peripheral throughput |
| Dual I/O (SDI) Interface | Supports 2-bit-per-clock operation, offering intermediate bandwidth scaling without requiring full SQI hardware |
| Zero Write Time | Eliminates write cycle delays-data is stored immediately upon CS deactivation, critical for deterministic logging |
| Page Write Mode (32-byte) | Reduces firmware overhead by allowing burst writes within page boundaries without repeated address retransmission |
| Extended Temperature Range | Rated –40°C to +125°C; qualified for under-hood automotive applications per AEC-Q100 stress test requirements |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Data Logger |
|---|---|
Use Scenario: Real-time capture of sensor fusion data (MAP, RPM, O2) during transient engine events with guaranteed non-volatile retention across ignition cycles. IC Role / Device Role / Timing Role: High-speed, low-latency SRAM buffer interfacing directly with PIC® MCU's SPI port; acts as volatile scratchpad with brownout-safe data hold. Use Value: Enables deterministic 20 MHz data capture without wait states; 1.0 V retention voltage prevents loss during cranking-induced voltage sag. | Use Scenario: Cyclic buffering of analog I/O timestamps and process values in modular industrial controllers with limited PCB space. IC Role / Device Role / Timing Role: Compact 8-pin SOIC SRAM providing 128KB of fast-access memory for ring-buffered acquisition, controlled via ARM Cortex-M SPI master. Use Value: Eliminates need for external address latches or parallel bus traces; reduces BOM count and layout complexity versus PSRAM alternatives. |
| Medical Infusion Pump Controller | Avionics Health Monitoring Module |
Use Scenario: Storing calibrated dosing parameters and runtime fault logs in safety-critical drug delivery systems requiring traceable, tamper-resistant memory. IC Role / Device Role / Timing Role: SPI-connected SRAM used for configuration storage and event logging; accessed only during safe maintenance windows. Use Value: Unlimited write endurance ensures >10-year service life without wear leveling; RoHS compliance meets medical regulatory requirements. | Use Scenario: Capturing high-frequency vibration and temperature telemetry from jet engine sensors during flight tests, with immediate post-flight download. IC Role / Device Role / Timing Role: High-reliability SRAM interfaced to FPGA-based QSPI controller for burst-mode acquisition at 80 MB/s effective rate (SQI mode). Use Value: SQI interface achieves 4× SPI bandwidth without increasing clock frequency-reducing EMI and timing closure risk in avionics backplanes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 23LC1024-E/SN | Wider VCC range (2.5–5.5 V); higher standby current (20 µA at E-temp); same pinout and instruction set | Preferred where 3.3 V or 5 V supply is fixed and 1.8 V rail unavailable | Select 23LC1024-E/SN only if system lacks regulated 1.8 V supply; verify MCU I/O voltage compatibility |
| IS66WV10248BLL-150B3LI | Parallel-interface 1M×8 SRAM; 15 ns access; 3.3 V only; no SDI/SQI; different package (44-pin TSOP) | Used where legacy parallel bus exists and SPI bandwidth insufficient for burst capture | Choose IS66WV10248BLL-150B3LI only when migrating from existing parallel-SRAM designs; requires PCB redesign |
Compared with 23LC1024-E/SN, the 23A1024-E/SN offers lower operating voltage and reduced standby current-critical for 1.8 V automotive domains-while both share identical timing, command set, and package. The IS66WV10248BLL-150B3LI provides faster random access but demands parallel routing and higher power, making it unsuitable for space- or energy-constrained SPI-based systems.
Availability
23A1024-E/SN is available at Aetrix Electronics and suitable for automotive ECU development, industrial data loggers, and medical infusion pump design requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 23A1024-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 microcontrollers, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.
The 23A1024/23LC1024 family was designed specifically for high-reliability, low-power serial memory applications in automotive, industrial, and medical systems where SPI interface simplicity, extended temperature operation, and unlimited endurance are mandatory.
FAQ
What is the maximum clock frequency supported by the 23A1024-E/SN in extended temperature operation?
The 23A1024-E/SN supports up to 16 MHz in extended temperature (–40°C to +125°C) operation, as specified in Table 1-2 AC Characteristics. This is a derated limit relative to its 20 MHz rating at industrial temperature, ensuring timing margin and reliability under worst-case thermal stress. All timing parameters-including TCSS, TCSH, and TV-are validated at this 16 MHz rate for E-temp grade units.
Does the 23A1024-E/SN support Quad SPI (QSPI) mode, and how is it enabled?
Yes, the 23A1024-E/SN supports Serial Quad Interface (SQI) mode using pins SIO0–SIO3. It is enabled by issuing the EQIO command (0x38) via SPI. Once activated, the device operates in 4-bit-per-clock mode; the HOLD function is disabled in SQI mode. To revert, the RSTIO command (0xFF) must be sent in SQI configuration, as documented in Figure 4-8 of DS20005142C.
What is the minimum supply voltage required to retain data in the 23A1024-E/SN during power loss?
The 23A1024-E/SN guarantees data retention down to 1.0 V VCC, as specified in Parameter D011 (VDR) of Table 1-1. This allows the device to preserve RAM contents during brownout events-such as automotive cranking-provided the backup supply or decoupling capacitance sustains VCC ≥ 1.0 V for the duration of the fault. No external capacitor is required solely for retention.
Can the 23A1024-E/SN be used interchangeably with the 23LC1024-E/SN on the same PCB layout?
No-the 23A1024-E/SN and 23LC1024-E/SN are not interchangeable without validation. Although they share identical pinout, package, and instruction set, their VCC ranges differ (1.7–2.2 V vs. 2.5–5.5 V), and their DC characteristics-including VIH/VIL thresholds and ICC behavior-are specified separately. Substituting one for the other may cause functional failure or accelerated wear if voltage levels fall outside the rated range.
How does the HOLD function operate in the 23A1024-E/SN, and when is it unavailable?
The HOLD function in the 23A1024-E/SN suspends ongoing SPI or SDI communication without resetting the internal address counter or command state. It is asserted by pulling HOLD/SIO3 low while SCK is low. HOLD is unavailable in SQI mode, as pin HOLD/SIO3 becomes SIO3-a bidirectional data line-and the suspend feature is disabled per Section 3.6 of the datasheet.
23A1024-E/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:
- 16 MHz
- Write Cycle Time - Word, Page:
- -
- Access Time:
- -
- Voltage - Supply:
- 1.7V ~ 2.2V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
23A1024-E/SN FAQ
1.How can I place an order for 23A1024-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 23A1024-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 23A1024-E/SN reliable?
The price and inventory of 23A1024-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 23A1024-E/SN is usually 5 days.
3.What payment methods are accepted for 23A1024-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23A1024-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 23A1024-E/SN?
23A1024-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 23A1024-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 23A1024-E/SN?
For technical support, including 23A1024-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23A1024-E/SN requirements.
6.How does Aetrix verify that 23A1024-E/SN is sourced from the original manufacturer or authorized distributors?
All 23A1024-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 23A1024-E/SN meets industry standards.
7.What is the process for return or replacement of 23A1024-E/SN?
All 23A1024-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 23A1024-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 23A1024-E/SN part is unused and in its original packaging.
Return procedure for 23A1024-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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