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Infineon Technologies CY6264-55SNXCT
- Part No.:
- CY6264-55SNXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY6264-55SNXCT.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,456
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Product details
Overview
CY6264-55SNXCT from Cypress Semiconductor is an 8K × 8 (64 Kbit) CMOS static RAM with 55 ns access time, TTL-compatible I/O, and dual chip enable (CE1 active LOW, CE2 active HIGH) for flexible memory expansion in embedded systems. It operates at 5 V ±10%, supports commercial temperature range (0°C to +70°C), and features automatic power-down via CE1, reducing standby current to 15 mA.
For engineers reviewing the CY6264-55SNXCT datasheet, CY6264-55SNXCT pinout, CY6264-55SNXCT application, or CY6264-55SNXCT equivalent, key selection criteria include access timing consistency under 55 ns, low-power deselected operation, SOIC-28 package compatibility, and support for parallel bus interfacing in legacy microcontroller systems.
Technical Context
The CY6264-55SNXCT implements a fully static 8192 × 8-bit memory array with three-state bidirectional I/O drivers controlled by OE and WE. Its dual CE architecture enables hierarchical memory decoding-CE1 selects the device while CE2 provides polarity-matched gating for multi-chip configurations.
Write operations require simultaneous CE1 = LOW, CE2 = HIGH, and WE = LOW; reads occur when CE1 = LOW, CE2 = HIGH, OE = LOW, and WE = HIGH. The device maintains high-impedance I/O states during deselection or output disable, ensuring clean bus sharing without external isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 8K × 8 (65,536 bits), enabling direct byte-addressable access without banking logic |
| Access Time | 55 ns max - guarantees deterministic read latency for 18 MHz bus timing budgets |
| VCC Supply | 5 V ±10% - compatible with standard TTL/CMOS logic rails and legacy 5 V system designs |
| Standby Current | 15 mA max (ISB2) - enables low-power hold mode during CPU idle cycles without external control |
| Operating Temperature | 0°C to +70°C - validated for commercial-grade industrial control panels and instrumentation |
| Input/Output Compatibility | TTL-compatible VIH/VIL and VOH/VOL - eliminates level-shifting requirements on 5 V microprocessor buses |
| Package | 28-pin SOIC (300-mil body, SN28 footprint) - supports automated SMT assembly and board-level repair |
Pinout & Package
Package: 28-pin narrow-body SOIC (300-mil width, SN28 outline), RoHS-compliant (Pb-free), 450-mil overall length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A12 | Address Inputs | 13-bit address bus supporting full 8K-word decoding; no external address latching required |
| I/O0–I/O7 | Bidirectional Data Bus | Three-state CMOS I/O pins shared for read/write; high-impedance when CE1 or OE inactive |
| CE1 | Active-LOW Chip Enable | Primary selection signal; asserts automatic power-down (ISB2 ≤15 mA) when HIGH |
| CE2 | Active-HIGH Chip Enable | Secondary enable for cascaded memory banks; must be HIGH for any operation |
| OE | Active-LOW Output Enable | Controls data bus direction: LOW enables read outputs; HIGH forces high-Z regardless of CE state |
| WE | Active-LOW Write Enable | Defines write cycle boundary; LOW with valid CE conditions initiates data latch into addressed location |
| VCC, GND | Power Supply | Single 5 V supply; decoupling required within 10 mm of pins 14 (VCC) and 15 (GND) |
| NC | No Connect | Pin 13 is unconnected - must remain floating; not usable as spare I/O or ground |
Key Features
| Feature | Design Value |
|---|---|
| Dual Chip Enable (CE1/CE2) | Enables hierarchical memory mapping across multiple CY6264 devices without external logic gates |
| Automatic Power-Down | Reduces ISB2 to 15 mA at VCC = 5 V when CE1 = HIGH - eliminates need for external sleep controllers |
| TTL-Compatible I/O | Direct interface to 80Cxx, Z80, and 68000-family microprocessors without level translators |
| Alpha Particle Immunity | Die coat protection ensures reliable operation in radiation-prone environments like medical imaging subsystems |
| SOIC-28 Pb-Free Packaging | Meets RoHS Directive 2011/65/EU; compatible with lead-free reflow profiles (peak 260°C) |
Applications
| Industrial PLC Memory Expansion | Legacy Microcontroller Data Buffering |
|---|---|
|
Use Scenario: Adding non-volatile data logging capacity to Allen-Bradley SLC-500 controllers using parallel bus interfaces. IC Role / Device Role / Timing Role: Static RAM serving as fast-access scratchpad memory for real-time process variable storage between scan cycles. Use Value: 55 ns access time meets SLC-500's 200 ns bus cycle requirement; CE1-controlled power-down cuts idle power by >70%. |
Use Scenario: Extending RAM capacity in TI MSP430F5xx-based energy metering firmware with external memory mapping. IC Role / Device Role / Timing Role: Byte-wide SRAM providing additional stack and heap space beyond on-chip limits, accessed via 16-bit address bus. Use Value: TTL-compatible I/O eliminates level shifters; SOIC-28 footprint matches existing PCB layout standards for retrofit upgrades. |
| Medical Diagnostic Instrumentation | Automotive ECU Bootloader Storage |
|
Use Scenario: Storing calibration coefficients and sensor offset tables in portable ultrasound transducer modules. IC Role / Device Role / Timing Role: Non-refreshing memory holding critical configuration data during power transitions and thermal cycling. Use Value: Alpha immunity prevents soft errors from ambient radiation; 0°C to +70°C rating covers clinical operating environments. |
Use Scenario: Hosting firmware patch images during over-the-air updates in Bosch EDC17 diesel engine control units. IC Role / Device Role / Timing Role: External code/data buffer allowing safe in-field reprogramming without interrupting main MCU execution. Use Value: Dual CE architecture isolates SRAM during update handshake; 55 ns timing supports CAN FD bootloader response deadlines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISSI IS62C256AL-55PLI | 32K × 8 organization, 55 ns access, same SOIC-28, but requires single CE (active LOW) and no CE2 | Larger density simplifies memory mapping but lacks CE2-based bank selection for multi-device hierarchies | Select when board space permits larger memory and CE2 functionality is unused |
| Renesas R1LV064A-55L-JE | 64K × 1 organization, 55 ns, SOIC-32, requires external data bus multiplexing for byte access | Requires 8× more address lines and glue logic to emulate 8K × 8 behavior | Choose only if migrating to higher-density architectures with redesign allowance |
Compared with IS62C256AL-55PLI and R1LV064A-55L-JE, the CY6264-55SNXCT uniquely delivers pin-compatible 8K × 8 density with dual CE support and zero-bus-glue integration-critical for drop-in replacement in legacy 8-bit and 16-bit controller designs.
Availability
CY6264-55SNXCT is available at Aetrix Electronics and suitable for industrial PLC memory expansion, legacy microcontroller data buffering, medical diagnostic instrumentation, and automotive ECU bootloader storage requiring stable component supply across long-lifecycle programs.
Supply support for CY6264-55SNXCT 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
Cypress Semiconductor (now part of Infineon Technologies) is a fabless semiconductor company specializing in memory, PSoC, and USB solutions for industrial, automotive, and consumer markets.
The CY6264 belongs to Cypress's legacy parallel SRAM product line, designed specifically for plug-and-play memory expansion in 8-bit and 16-bit microprocessor systems where timing predictability and bus simplicity are essential.
FAQ
Is CY6264-55SNXCT compatible with 3.3 V systems?
No. The CY6264-55SNXCT is specified only for 5 V ±10% operation (4.5 V to 5.5 V). Its TTL-compatible inputs require ≥2.2 V for VIH and its outputs deliver VOH ≥2.4 V at IOH = –4 mA - it cannot reliably interface with 3.3 V logic without level translation. Operating outside the 5 V range risks undefined behavior and violates maximum ratings.
What is the function of the NC pin (Pin 13)?
Pin 13 is designated NC (No Connect) in the official pinout and has no internal connection. It must remain electrically floating - neither tied to VCC nor GND. Routing traces or vias to this pin may cause mechanical stress or solder bridging; the pad should be left unconnected per Cypress design guidelines.
Does CY6264-55SNXCT support battery backup operation?
No. The device lacks built-in battery-switching circuitry or VBAT pin. While its low ISB2 current (15 mA) reduces drain during hold, sustained operation below VCC min (4.5 V) violates specifications. For battery-backed SRAM, Cypress offers the CY14B101Q (nvSRAM), which integrates nonvolatile storage and automatic store/restore.
How does CE1 power-down interact with CE2 and OE states?
When CE1 is HIGH, the device enters automatic power-down regardless of CE2 or OE state - ICC drops to ISB2 (≤15 mA). CE2 and OE have no effect in this mode. Only when CE1 goes LOW does CE2 polarity (must be HIGH) and OE state determine read/write activity. This decouples power control from bus protocol timing.
CY6264-55SNXCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- MOBL™
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Asynchronous
- Memory Size:
- 64Kbit
- Memory Organization:
- 8K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 55ns
- Access Time:
- 55 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOIC
CY6264-55SNXCT FAQ
1.How can I place an order for CY6264-55SNXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY6264-55SNXCT 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 CY6264-55SNXCT reliable?
The price and inventory of CY6264-55SNXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY6264-55SNXCT is usually 5 days.
3.What payment methods are accepted for CY6264-55SNXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY6264-55SNXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY6264-55SNXCT?
CY6264-55SNXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY6264-55SNXCT 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 CY6264-55SNXCT?
For technical support, including CY6264-55SNXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY6264-55SNXCT requirements.
6.How does Aetrix verify that CY6264-55SNXCT is sourced from the original manufacturer or authorized distributors?
All CY6264-55SNXCT 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 CY6264-55SNXCT meets industry standards.
7.What is the process for return or replacement of CY6264-55SNXCT?
All CY6264-55SNXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY6264-55SNXCT, 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 CY6264-55SNXCT part is unused and in its original packaging.
Return procedure for CY6264-55SNXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY6264-55SNXCT Tags
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