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Microchip Technology 23A512-E/P
- Part No.:
- 23A512-E/P
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
23A512-E/P.pdf
- Description:
- IC SRAM 512KBIT SPI/QUAD 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,681
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Product details
Overview
23A512-E/P from Microchip Technology is a 512-Kbit serial SRAM with SPI/SDI/SQI interface, operating at 1.7V–2.2V supply and supporting Industrial (−40°C to +85°C) and Extended (−40°C to +125°C) temperature ranges. 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 for real-time data buffering in automotive engine control units.
For engineers reviewing the 23A512-E/P datasheet, 23A512-E/P pinout, 23A512-E/P application, or 23A512-E/P equivalent, key selection criteria include low-voltage operation (1.7–2.2 V), dual/quad I/O support, zero write time, unlimited endurance, and PDIP-8 packaging for through-hole prototyping and legacy industrial designs.
Technical Context
The 23A512-E/P implements a synchronous serial interface with three operational modes-Byte, Page, and Sequential-controlled via a writable MODE register. Its SPI-compatible bus supports standard single-I/O, dual-I/O (SDI), and quad-I/O (SQI) protocols, with dedicated SIO0–SIO3 pins enabling up to 4-bit-per-clock transfers in SQI mode.
It features hardware HOLD functionality for pausing ongoing transfers without sequence reset, though HOLD is disabled in SQI mode due to pin sharing. The device powers on in Standby mode (CS = high), requires CS low to initiate operations, and maintains data retention down to 1.0 V VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8-bit), enabling storage of 65,536 bytes for firmware scratchpad or sensor log buffers |
| Interface Modes | SPI / SDI / SQI - supports flexible bandwidth scaling: 20 MHz single-I/O, ~40 Mbps dual-I/O, ~80 Mbps quad-I/O |
| VCC Range | 1.7 V to 2.2 V - compatible with low-power microcontrollers and battery-backed systems |
| Max Clock Frequency | 20 MHz (Industrial temp), 16 MHz (Extended temp) - defines maximum sustained throughput in SPI mode |
| 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 |
| Standby Current | 4 µA at +85°C - enables ultra-low-power sleep states in always-on telemetry modules |
| Data Retention Voltage | 1.0 V minimum - guarantees RAM contents survive brown-out events down to 1.0 V VCC |
| Endurance & Retention | Unlimited read/write cycles; data retention >20 years at +85°C - eliminates wear-leveling overhead in logging applications |
Pinout & Package
8-Lead PDIP (Plastic Dual In-Line Package), 300 mil body width, through-hole mount with 0.100" pitch - suitable for breadboarding, test fixtures, and legacy PCBs requiring axial lead compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low enable; forces device into Standby (high-Z SO) when deasserted; required for multi-drop SPI bus sharing |
| SO/SIO1 | Serial Output / SDI/SQI Pin | Tri-state output in SPI mode; shared as bidirectional I/O in SDI/SQI; must not float in SPI/SDI |
| SIO2 | SQI Pin | Quad-data input/output only; unused and NC in SPI/SDI modes; must be tied per mode requirements |
| VSS | Ground | Primary reference for all digital and analog circuitry; requires low-impedance connection to system ground plane |
| SI/SIO0 | Serial Input / SDI/SQI Pin | Input-only in SPI mode; bidirectional in SDI/SQI; shares function with SO/SIO1 and SIO2/SIO3 |
| SCK | Serial Clock Input | Edge-triggered master clock; rising edge latches SI, falling edge updates SO; timing-critical for setup/hold compliance |
| HOLD/SIO3 | Hold / SQI Pin | Pauses active transfer without resetting address pointer; disabled in SQI mode due to pin conflict |
| VCC | Power Supply | 1.7–2.2 V supply; bypass capacitor (0.1 µF) required near pin for noise immunity and transient response |
Key Features
| Feature | Design Value |
|---|---|
| Zero Write Time | Eliminates wait states during byte/page writes - enables deterministic latency-critical logging (e.g., CAN message timestamping) |
| Page & Sequential Modes | 32-byte auto-incremented page writes and full-array sequential access reduce host CPU overhead vs. discrete byte commands |
| SDI/SQI High-Speed Modes | Dual- and quad-I/O modes double or quadruple effective throughput over standard SPI - critical for burst data capture (e.g., ADC streams) |
| HOLD Function | Enables interruption of multi-byte transfers (e.g., during interrupt servicing) without losing internal address state or reinitializing CS |
| RoHS-Compliant PDIP | Meets environmental compliance for industrial and automotive deployments while retaining mechanical robustness of through-hole mounting |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Data Logger |
|---|---|
Use Scenario: Real-time storage of sensor calibration offsets and fault codes during engine runtime, surviving ignition cycling and voltage transients. IC Role / Device Role / Timing Role: Nonvolatile scratchpad memory interfacing directly with PIC MCU's SPI port; retains data across 1.0 V brown-outs. Use Value: Eliminates external EEPROM write delays and wear limitations; enables sub-millisecond parameter updates during closed-loop control. | Use Scenario: Buffering high-frequency analog input samples from multiple channels before batch upload to HMI or cloud gateway. IC Role / Device Role / Timing Role: High-speed serial SRAM acting as FIFO between ADC controller and ARM-based host processor using SQI mode. Use Value: 80 Mbps SQI bandwidth prevents sample loss at 1 MSPS aggregate sampling; unlimited endurance avoids field replacement. |
| Medical Infusion Pump Controller | Railway Signaling Diagnostic Module |
Use Scenario: Storing dosage history, alarm logs, and calibration records in safety-critical embedded system with strict power-loss recovery requirements. IC Role / Device Role / Timing Role: Low-voltage (1.8 V) SRAM co-powered with MCU; leverages 1.0 V data retention to preserve logs during battery switchover. Use Value: Guarantees audit trail integrity without backup capacitors or supercaps - reducing BOM cost and board space. | Use Scenario: Capturing event timestamps and status snapshots during track-side signal failure diagnostics under wide ambient temperature swings (−40°C to +125°C). IC Role / Device Role / Timing Role: Extended-temp serial SRAM interfaced via SPI to FPGA-based monitoring logic; operates reliably across rail yard thermal extremes. Use Value: E-temp rating and 4 µA standby current extend battery life in unpowered diagnostic nodes; PDIP package simplifies field-replaceable module design. |
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 feature set; no HOLD in SQI mode | Requires ≥2.5 V supply; unsuitable for 1.8 V systems but compatible with 3.3/5 V MCUs | Select when existing 3.3 V or 5 V infrastructure precludes low-voltage redesign |
| FM25V512-G | F-RAM technology; 2.7–3.6 V supply; 40 MHz SPI; 151 µA active current; 10-year data retention | No write endurance limit; faster writes than SRAM; higher active current; different command set and timing | Choose for ultra-high-write-cycle applications where 23A512-E/P's 3 mA read current is acceptable but F-RAM's instant writes add value |
Compared with 23LC512-I/P and FM25V512-G, the 23A512-E/P uniquely supports 1.7–2.2 V operation and Extended temperature range in PDIP packaging - making it the only option for low-voltage, high-reliability, through-hole deployed serial SRAM in harsh environments.
Availability
23A512-E/P is available at Aetrix Electronics and suitable for automotive ECU development, industrial PLC data logging, and medical infusion pump controller designs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant through-hole packaging.
Supply support for 23A512-E/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 microcontroller, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with vertically integrated silicon and software tools.
The 23A512-E/P 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 endurance, speed, and voltage flexibility are critical.
FAQ
What is the supply voltage range for the 23A512-E/P?
The 23A512-E/P operates from 1.7 V to 2.2 V. This narrow low-voltage range enables direct integration with 1.8 V microcontrollers and battery-backed systems. Operation outside this range - including at 2.5 V or higher - is not guaranteed and may cause functional failure or reduced reliability. Always verify VCC against the device's specified limits before system power-up.
Does the 23A512-E/P support quad-SPI (QSPI) mode?
Yes, the 23A512-E/P supports Serial Quad Interface (SQI) mode via the EQIO command, enabling four-bit-per-clock data transfers. However, SQI mode disables the HOLD function due to pin sharing between HOLD/SIO3 and the quad I/O bus. Use the RSTIO command to exit SQI mode and restore HOLD capability when needed.
What is the maximum clock frequency for the 23A512-E/P at extended temperature?
The 23A512-E/P supports up to 16 MHz maximum clock frequency when operating across the Extended temperature range (−40°C to +125°C). This is explicitly specified in Table 1-2 AC CHARACTERISTICS and applies to all interface modes (SPI, SDI, SQI). At Industrial temperature (−40°C to +85°C), the max clock is 20 MHz.
Is the 23A512-E/P pin-compatible with the 23LC512-I/P?
Yes, the 23A512-E/P and 23LC512-I/P share identical 8-pin PDIP packaging, pin functions, and physical layout. Both devices use the same CS/SO/SI/SCK/VSS/VCC/HOLD/SIO2 pin assignments. However, they differ electrically: 23A512-E/P requires 1.7–2.2 V, while 23LC512-I/P requires 2.5–5.5 V - so direct substitution requires matching the supply voltage.
What does "E/P" mean in the part number 23A512-E/P?
In 23A512-E/P, "E" denotes Extended temperature grade (−40°C to +125°C), and "P" indicates 8-Lead Plastic Dual In-Line Package (PDIP). This distinguishes it from variants like 23A512-I/SN (Industrial temp, SOIC) or 23A512-E/ST (Extended temp, TSSOP). The "E/P" suffix confirms both environmental rating and through-hole mechanical form factor.
23A512-E/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:
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
23A512-E/P FAQ
1.How can I place an order for 23A512-E/P through Aetrix?
Please submit a Request for Quotation (RFQ) for 23A512-E/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-E/P reliable?
The price and inventory of 23A512-E/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-E/P is usually 5 days.
3.What payment methods are accepted for 23A512-E/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23A512-E/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 23A512-E/P?
23A512-E/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 23A512-E/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-E/P?
For technical support, including 23A512-E/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23A512-E/P requirements.
6.How does Aetrix verify that 23A512-E/P is sourced from the original manufacturer or authorized distributors?
All 23A512-E/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-E/P meets industry standards.
7.What is the process for return or replacement of 23A512-E/P?
All 23A512-E/P units undergo pre-shipment inspection (PSI). If there is an issue with 23A512-E/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-E/P part is unused and in its original packaging.
Return procedure for 23A512-E/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
23A512-E/P Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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AT24CS02-SSHM-T
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AT24C04C-SSHM-T
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