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Microchip Technology 23K640-E/SNVAO
- Part No.:
- 23K640-E/SNVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
23K640-E/SNVAO.pdf
- Description:
- IC SRAM 64KBIT SPI 20MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,798
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Product details
Overview
23K640-E/SNVAO from Microchip Technology is a 64 Kbit (8192 × 8) low-power SPI serial SRAM with 32-byte page architecture, 20 MHz max clock frequency, 2.7–3.6 V supply range, and automotive-grade temperature support (−40°C to +125°C). It integrates HOLD functionality for interrupt-safe bus pausing and targets memory buffering in automotive infotainment control units, engine control modules, and ADAS sensor data loggers.
For engineers reviewing the 23K640-E/SNVAO datasheet, 23K640-E/SNVAO pinout, 23K640-E/SNVAO application, or 23K640-E/SNVAO equivalent, key selection criteria include its automotive-temp SPI SRAM interface, 4 µA max standby current at +85°C, 32-byte page write capability, and TSSOP-8 package compatibility with space-constrained ECU designs.
Technical Context
The 23K640-E/SNVAO implements a standard SPI-compatible serial interface with separate SI (data in), SO (data out), SCK (clock), CS (chip select), and HOLD (bus pause) signals. Its internal 8-bit instruction register accepts READ (0x03), WRITE (0x02), RDSR (0x05), and WRSR (0x01) commands, all MSB-first, enabling byte/page/sequential access modes controlled via STATUS register bits 7–6.
It operates in three configurable modes: Byte (default), Page (1024 pages × 32 bytes), and Sequential (full 8K-byte wraparound). The HOLD pin suspends active transfers without resetting the address pointer-critical for deterministic response to high-priority MCU interrupts in real-time automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 64 Kbit (8192 × 8-bit organization), sufficient for firmware parameter storage or short-duration sensor buffer in ECUs |
| Supply voltage | 2.7–3.6 V - compatible with automotive 3.3 V rail and tolerant of transient brownouts |
| Max clock frequency | 20 MHz at 3.0 V (I-temp); enables 2.5 MB/s peak throughput for burst logging |
| Standby current | ≤4 µA at +85°C - extends battery-backed retention time in always-on vehicle modules |
| Page size | 32 bytes - balances write efficiency and granularity for CAN message buffering or calibration table updates |
| Temperature grade | Automotive (E): −40°C to +125°C - qualified for under-hood and transmission control applications |
| Interface | SPI-compatible 4-wire serial (CS/SI/SO/SCK) plus HOLD - eliminates parallel bus routing complexity |
Pinout & Package
23K640-E/SNVAO is packaged in an 8-lead TSSOP (Thin Shrink Small Outline Package), 3.0 mm × 4.4 mm body, 0.65 mm pitch, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select Input | Active-low enable; forces SO into high-impedance when deasserted, enabling multi-device SPI bus sharing |
| SO (Pin 2) | Serial Data Output | Tri-stated when CS high or HOLD low; outputs data on falling edge of SCK during read cycles |
| VSS (Pin 4) | Ground Reference | Primary return path for I/O and core logic; must be low-inductance connection to minimize SPI noise |
| SI (Pin 5) | Serial Data Input | Latches instructions, addresses, and write data on rising edge of SCK; requires clean signal integrity |
| SCK (Pin 6) | Serial Clock Input | Master-generated clock; defines timing for SI sampling and SO output update; max 20 MHz |
| HOLD (Pin 7) | Bus Pause Control | Halts ongoing SPI transfer mid-sequence without address reset; requires STATUS bit 0 = 0 to enable |
| VCC (Pin 8) | Power Supply | 2.7–3.6 V input; decoupling capacitor (0.1 µF) required within 5 mm of pin for stable operation |
Key Features
| Feature | Design Value |
|---|---|
| 32-byte page write mode | Enables efficient burst writes without per-byte overhead-reduces SPI transaction count by up to 32× vs. byte mode |
| HOLD pin with resume-from-pause | Preserves internal address pointer during MCU interrupt servicing-eliminates retransmission of command/address sequence |
| Automotive temperature qualification | Validated operation from −40°C to +125°C-meets AEC-Q100 stress test requirements for engine bay placement |
| Low standby current (≤4 µA) | Minimizes quiescent power draw in sleep-mode ECUs-extends battery life in parked-vehicle monitoring functions |
| Pb-free, halogen-free TSSOP-8 | Complies with EU RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) |
Applications
| Engine Control Unit (ECU) Calibration Storage | ADAS Camera Sensor Data Buffer |
|---|---|
Use Scenario: Storing real-time fuel trim tables, ignition timing maps, and OBD-II diagnostic logs in a gasoline direct injection ECU. IC Role / Device Role / Timing Role: Non-volatile SRAM buffer holding volatile calibration parameters updated during drive cycles; accessed via SPI from PIC MCU. Use Value: Enables fast (<100 ns access latency) read/write of critical engine parameters without EEPROM wear-out limitations or flash programming delays. | Use Scenario: Temporarily buffering raw image frames from a 1 MP CMOS camera before JPEG compression and CAN transmission in lane-departure warning systems. IC Role / Device Role / Timing Role: High-speed SPI-accessible frame buffer providing 8 KB of scratchpad memory for pixel pipeline staging. Use Value: Supports 20 MHz SPI bursts to absorb 15 fps image streams (≈1.2 MB/s), preventing frame drops during processor-intensive vision processing. |
| Infotainment Head Unit UI State Memory | Transmission Control Module (TCM) Fault Log |
Use Scenario: Retaining radio station presets, volume levels, display brightness settings, and Bluetooth pairing state across ignition cycles in automotive head units. IC Role / Device Role / Timing Role: Low-power SRAM maintaining user interface context; powered from always-on 3.3 V rail with <4 µA standby draw. Use Value: Eliminates need for backup battery or supercapacitor-reduces BOM cost and board area while ensuring instant UI restore after key-off/key-on. | Use Scenario: Logging gear shift errors, solenoid driver faults, and hydraulic pressure anomalies in automatic transmission controllers for dealer diagnostics. IC Role / Device Role / Timing Role: Circular-buffer SRAM storing timestamped fault codes and sensor snapshots triggered by ISO 14229 UDS services. Use Value: Provides 8 KB of fast-access, wear-free logging memory-supports 500+ fault entries with no endurance degradation over 15-year vehicle lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI serial SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY14V101QS-SZXC | 128 Kbit (16K × 8), NVSRAM with embedded lithium battery; 3.0–3.6 V; 25 MHz max clock | Provides non-volatile data retention without external backup; larger capacity but higher cost and larger SOIC-16 footprint | Select when zero-data-loss retention during main power loss is mandatory-e.g., airbag control module event logs. |
| IS62WV51216BLL-55TLI | 8 Mbit parallel SRAM (512K × 16); 3.3 V; 55 ns access; 44-pin TSOP-II | Higher density and speed but requires 22+ address/data/control lines-increases PCB layer count and layout complexity | Select only if legacy parallel bus architecture exists and SPI conversion is impractical; not drop-in replaceable. |
Compared with CY14V101QS-SZXC, 23K640-E/SNVAO offers lower cost, smaller TSSOP-8 footprint, and simpler SPI integration-but lacks inherent non-volatility. Compared with IS62WV51216BLL-55TLI, it reduces pin count from 44 to 8 and eliminates address decoding logic, yet trades off bandwidth and density for embedded-systems scalability.
Availability
23K640-E/SNVAO is available at Aetrix Electronics and suitable for automotive control units, ADAS sensor interfaces, and infotainment subsystems requiring stable component supply across extended vehicle production lifecycles.
Supply support for 23K640-E/SNVAO 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, analog, FPGA, and memory solutions, serving automotive, industrial, consumer, and communications markets with vertically integrated silicon and development tools.
The 23K640 belongs to Microchip's SPI Serial SRAM product line, designed specifically for space- and power-constrained embedded systems needing reliable, low-latency, serial-access memory with automotive-grade reliability and simplified board layout.
FAQ
What is the operating voltage range for the 23K640-E/SNVAO?
The 23K640-E/SNVAO operates from 2.7 V to 3.6 V. This range ensures compatibility with standard 3.3 V automotive power rails and accommodates typical voltage tolerances and transients. Operation outside this range may cause functional failure or data corruption. The device is not rated for 1.8 V operation-that specification applies only to the 23A640 variant.
Does the 23K640-E/SNVAO support true non-volatile data retention?
No, the 23K640-E/SNVAO is a volatile SRAM and requires continuous VCC to retain data. It does not include embedded non-volatility (e.g., battery or capacitor backup). Data retention voltage (VDR) is specified at ≥1.2 V, meaning memory contents are preserved only while VCC remains above that threshold-typically supported by system-level backup schemes, not the device itself.
How does the HOLD function work on the 23K640-E/SNVAO?
The HOLD pin on the 23K640-E/SNVAO pauses active SPI communication without resetting the internal address pointer. To activate, HOLD must be pulled low while SCK is low and CS remains asserted. During HOLD, SI/SO/SCK are tri-stated and ignored. Resuming requires bringing HOLD high while SCK is low. The feature must first be enabled by clearing bit 0 (HOLD) in the STATUS register.
What package type is used for the 23K640-E/SNVAO?
The 23K640-E/SNVAO uses an 8-lead TSSOP (Thin Shrink Small Outline Package), identified by the "SN" suffix in the part number. Its dimensions are 3.0 mm × 4.4 mm with 0.65 mm lead pitch. This compact, surface-mount package supports automated assembly and meets JEDEC moisture sensitivity level 3 (MSL3) for reflow compatibility.
Can the 23K640-E/SNVAO be used in industrial temperature applications?
Yes-the 23K640-E/SNVAO is qualified for automotive temperature range (−40°C to +125°C), which fully encompasses industrial grade (−40°C to +85°C). Its electrical specifications-including max clock frequency, standby current, and AC timing-are guaranteed across the full automotive range. No derating is required for industrial use, and it exceeds standard industrial requirements.
23K640-E/SNVAO 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 - Synchronous, SDR
- Memory Size:
- 64Kbit
- Memory Organization:
- 8K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 20 MHz
- Write Cycle Time - Word, Page:
- -
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
23K640-E/SNVAO FAQ
1.How can I place an order for 23K640-E/SNVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for 23K640-E/SNVAO 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 23K640-E/SNVAO reliable?
The price and inventory of 23K640-E/SNVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 23K640-E/SNVAO is usually 5 days.
3.What payment methods are accepted for 23K640-E/SNVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 23K640-E/SNVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 23K640-E/SNVAO?
23K640-E/SNVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 23K640-E/SNVAO 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 23K640-E/SNVAO?
For technical support, including 23K640-E/SNVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 23K640-E/SNVAO requirements.
6.How does Aetrix verify that 23K640-E/SNVAO is sourced from the original manufacturer or authorized distributors?
All 23K640-E/SNVAO 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 23K640-E/SNVAO meets industry standards.
7.What is the process for return or replacement of 23K640-E/SNVAO?
All 23K640-E/SNVAO units undergo pre-shipment inspection (PSI). If there is an issue with 23K640-E/SNVAO, 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 23K640-E/SNVAO part is unused and in its original packaging.
Return procedure for 23K640-E/SNVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
23K640-E/SNVAO Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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AT24C04C-SSHM-T
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