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Microchip Technology 23A1024-I/P
- Part No.:
- 23A1024-I/P
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
23A1024-I/P.pdf
- Description:
- IC SRAM 1MBIT SPI/QUAD 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,469
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Product details
Overview
23A1024-I/P 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 5.5 V (typical), 4 µA standby current at +85°C, and unlimited read/write cycles - used for real-time data buffering in industrial microcontroller systems requiring fast nonvolatile-adjacent memory.
For engineers reviewing the 23A1024-I/P datasheet, 23A1024-I/P pinout, 23A1024-I/P application, or 23A1024-I/P equivalent, key selection criteria include voltage compatibility (1.7–2.2 V), industrial temperature range, quad/dual I/O mode enablement via EQIO/EDIO commands, and 8-pin PDIP package mechanical fit for legacy through-hole designs.
Technical Context
The 23A1024-I/P implements a serial SRAM architecture with three configurable access modes (Byte, Page, Sequential) controlled via a writable MODE register. Its SPI-compatible bus supports full-duplex communication using SI/SO, while SDI mode enables dual-bit transfers on SI/SO and SQI mode enables quad-bit transfers on SIO0–SIO3 - all sharing the same 24-bit address space and instruction set (e.g., 0x02 WRITE, 0x03 READ, 0x38 EQIO).
It features hardware HOLD functionality in SPI/SDI modes (suspended transfer without sequence reset), but HOLD is repurposed as SIO3 in SQI mode. The device powers up in Standby mode (CS = high), requires CS low to initiate operations, and maintains data retention down to 1.0 V VCC - critical for brown-out resilience in battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (128K × 8 bits); supports byte/page/sequential reads/writes with automatic address wraparound |
| Supply Voltage | 1.7–2.2 V; enables direct interfacing with 1.8 V logic systems without level shifting |
| Max Clock Frequency | 20 MHz (industrial temp); sustains 50 ns minimum clock period for high-throughput data streaming |
| Read Current | 3 mA at 5.5 V, 20 MHz (typical); confirms low active power draw during burst transfers |
| Standby Current | 4 µA at +85°C; ensures minimal quiescent drain in sleep-mode embedded controllers |
| Data Retention Voltage | 1.0 V minimum; guarantees RAM contents survive deep brown-out events down to 1 V supply |
| Interface Modes | SPI (standard), SDI (dual I/O), SQI (quad I/O); selectable via EDIO/EQIO/RSTIO commands |
Pinout & Package
8-lead PDIP package (0.300" wide), through-hole mount, RoHS compliant, with 0.1" lead pitch and standard DIP footprint compatible with legacy PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CS | Chip Select Input | Active-low enable; forces Standby mode when high, tri-states SO when deasserted |
| 2 - SO/SIO1 | Serial Output / SDI/SQI I/O 1 | Output-only in SPI; bidirectional 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 connection to system ground plane |
| 5 - SI/SIO0 | Serial Input / SDI/SQI I/O 0 | Input-only in SPI; bidirectional in SDI/SQI; data latched on SCK rising edge |
| 6 - SCK | Serial Clock Input | Synchronizes all data transfers; rising edge clocks inputs, falling edge updates outputs |
| 7 - HOLD/SIO3 | Hold Control / SQI I/O 3 | HOLD active-low suspend in SPI/SDI; becomes SIO3 in SQI mode; must be held high when unused |
| 8 - VCC | Power Supply | 1.7–2.2 V nominal; decoupling capacitor (0.1 µF) required within 10 mm of pin for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Unlimited Read/Write Cycles | Enables continuous logging or buffer rotation without wear-out concerns - no endurance limits specified |
| Zero Write Time | No internal write cycle delay; data written on CS high transition - eliminates wait-state overhead in time-critical firmware |
| Page Mode (32-byte) | Reduces command overhead for block transfers: single address + 32 bytes per CS assertion, auto-incremented within page |
| Quad I/O (SQI) Support | Doubles effective throughput vs. SPI: 4 bits/clock at 20 MHz = 10 MB/s theoretical bandwidth |
| Industrial Temp Range | –40°C to +85°C operation validated per DC/AC specs - suitable for factory automation and motor control environments |
Applications
| Industrial Data Logger | Medical Sensor Hub |
|---|---|
Use Scenario: Real-time acquisition of analog sensor readings (e.g., pressure, temperature) at 1 kHz sampling rate with timestamping and local pre-processing before upload. IC Role / Device Role / Timing Role: High-speed SRAM buffer between ADC controller and host MCU; absorbs burst writes during wireless transmission gaps. Use Value: 20 MHz SQI interface enables 10 MB/s sustained write throughput; 4 µA standby current extends battery life during idle periods. | Use Scenario: Portable ECG monitor capturing raw waveform data for on-device analysis and selective cloud upload. IC Role / Device Role / Timing Role: Temporary storage for 30 seconds of 12-bit waveform samples prior to compression and transmission. Use Value: 1.7–2.2 V operation matches Li-ion battery discharge curve; zero-write-time behavior prevents sample loss during interrupt-driven capture. |
| PLC I/O Module | Smart Energy Meter |
Use Scenario: Isolated digital input/output expansion module in programmable logic controller rack handling 64-channel status polling and command execution. IC Role / Device Role / Timing Role: Local command queue and state history buffer for deterministic response to master scan cycles. Use Value: HOLD pin allows pausing ongoing transfers during priority interrupts without reinitializing the SPI sequence - ensures timing predictability. | Use Scenario: Revenue-grade electricity meter storing 15-minute interval consumption data, tamper logs, and firmware update staging area. IC Role / Device Role / Timing Role: Nonvolatile-adjacent scratchpad for secure cryptographic key derivation and temporary calibration parameter storage. Use Value: 1.0 V data retention threshold ensures integrity during AC mains dropout; industrial temp rating supports outdoor enclosure mounting. |
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/P | Wider VCC range (2.5–5.5 V); identical pinout, timing, and instruction set; no voltage-level translation needed for 3.3/5 V systems | Preferred where existing 3.3 V or 5 V supply rails eliminate need for dedicated 1.8 V LDO | Select when system already operates at ≥2.5 V and board layout accommodates same PDIP footprint |
| IS61WV102416BLL-10MLI | Parallel-interface 1 Mbit SRAM (1024K × 16); 10 ns access time; 3.3 V only; 48-pin TSOP | Requires full parallel bus (16 data + 20 address lines), higher pin count, and faster PCB routing - not drop-in | Choose only when maximum random-access speed is mandatory and PCB redesign is feasible |
Compared with 23LC1024-I/P, the 23A1024-I/P offers lower voltage operation essential for energy-constrained designs, while IS61WV102416BLL-10MLI provides nanosecond-level random access at the cost of interface complexity and board space - making 23A1024-I/P optimal for SPI-native, low-power embedded buffering.
Availability
23A1024-I/P is available at Aetrix Electronics and suitable for industrial data loggers, medical sensor hubs, PLC I/O modules, and smart energy meters requiring stable component supply across extended product lifecycles.
Supply support for 23A1024-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 23A1024/23LC1024 family was designed specifically for embedded systems needing fast, reliable, low-power serial memory with flexible I/O modes - targeting industrial control, automotive subsystems, and portable instrumentation.
FAQ
What is the supply voltage range for the 23A1024-I/P?
The 23A1024-I/P operates from 1.7 V to 2.2 V. This narrow low-voltage range enables direct integration with 1.8 V logic families and reduces power consumption in battery-powered or energy-harvesting systems. Operation outside this range may cause functional failure or data corruption - it is not rated for 2.5 V or higher.
Does the 23A1024-I/P support quad-SPI (QSPI) mode?
Yes, the 23A1024-I/P supports Serial Quad Interface (SQI) mode via the EQIO command (0x38). In SQI mode, it uses four I/O lines (SIO0–SIO3) to transfer four bits per clock cycle at up to 20 MHz, achieving up to 10 MB/s throughput. Note that HOLD functionality is disabled in SQI mode, as pin 7 becomes SIO3.
Can the 23A1024-I/P be used interchangeably with the 23LC1024-I/P?
No - the 23A1024-I/P and 23LC1024-I/P are not interchangeable due to incompatible supply voltage ranges: 23A1024-I/P requires 1.7–2.2 V, while 23LC1024-I/P requires 2.5–5.5 V. Using either outside its specified VCC range will result in undefined behavior. Both share identical pinout, timing, and instruction set, but voltage translation is mandatory for cross-use.
What is the purpose of the HOLD pin on the 23A1024-I/P?
The HOLD pin (pin 7) on the 23A1024-I/P suspends ongoing SPI/SDI transfers without resetting the internal address counter or command state. When pulled low while SCK is low, it places SO in high-impedance and pauses communication - useful during MCU interrupt servicing. HOLD is inactive in SQI mode, where pin 7 functions as SIO3.
How many write cycles does the 23A1024-I/P support?
The 23A1024-I/P supports unlimited write cycles - a defining characteristic of SRAM technology. Unlike flash or EEPROM, it imposes no endurance limit on writes, enabling continuous data logging, ring-buffer operation, or frequent configuration updates without degradation. This is explicitly stated in the device features and confirmed across all Microchip documentation.
23A1024-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:
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
23A1024-I/P FAQ
1.How can I place an order for 23A1024-I/P through Aetrix?
Please submit a Request for Quotation (RFQ) for 23A1024-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 23A1024-I/P reliable?
The price and inventory of 23A1024-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 23A1024-I/P is usually 5 days.
3.What payment methods are accepted for 23A1024-I/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23A1024-I/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 23A1024-I/P?
23A1024-I/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 23A1024-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 23A1024-I/P?
For technical support, including 23A1024-I/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23A1024-I/P requirements.
6.How does Aetrix verify that 23A1024-I/P is sourced from the original manufacturer or authorized distributors?
All 23A1024-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 23A1024-I/P meets industry standards.
7.What is the process for return or replacement of 23A1024-I/P?
All 23A1024-I/P units undergo pre-shipment inspection (PSI). If there is an issue with 23A1024-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 23A1024-I/P part is unused and in its original packaging.
Return procedure for 23A1024-I/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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