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Infineon Technologies CY6264-55SNXI
- Part No.:
- CY6264-55SNXI
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY6264-55SNXI.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,320
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Product details
Overview
CY6264-55SNXI 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 5V ±10% over –40°C to +85°C industrial range, features automatic CE1-controlled power-down (≤40 mA standby), and uses a 28-pin 300-mil SOIC package.
For engineers reviewing the CY6264-55SNXI datasheet, CY6264-55SNXI pinout, CY6264-55SNXI application, or CY6264-55SNXI equivalent, key selection criteria include industrial temperature support, CE1/CE2/OE logic decoding for multi-chip select, 55 ns read timing (tAA), and automatic low-power mode activation via CE1 high.
Technical Context
The CY6264-55SNXI implements a synchronous, non-volatile-independent SRAM array organized as 8192 words × 8 bits, with address decoding across A0–A12 (13-bit addressing). Its three-state bidirectional I/O lines (I/O0–I/O7) are controlled by combined CE1/CE2/OE/WE logic states, enabling precise read/write gating without external bus transceivers.
Power management is handled exclusively through CE1: when CE1 is HIGH (≥VCC – 0.3 V), the device enters automatic power-down, reducing ICC to ≤40 mA (industrial) while maintaining data retention. CE2 must be HIGH for any operation; OE enables output drivers only during reads when WE is HIGH and CE1 is LOW.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8K × 8 = 64 Kbit; supports byte-wide data buses without width expansion logic |
| Access Time (tAA) | 55 ns max; ensures compatibility with 12–15 MHz microcontroller bus cycles |
| Supply Voltage | 5V ±10%; compatible with legacy 5V TTL/CMOS system rails |
| Operating Temp | –40°C to +85°C; qualified for industrial control, motor drives, and instrumentation |
| Standby Current (ISB1) | ≤40 mA (industrial); enables low-quiescent power in sleep-mode systems |
| I/O Interface | TTL-compatible inputs/outputs; eliminates level-shifting in mixed-logic designs |
| Chip Enables | CE1 (active LOW) + CE2 (active HIGH); allows hierarchical memory mapping with up to 4 devices per decode group |
Pinout & Package
Package: 28-pin SOIC, 300-mil body width (SN28), surface-mount, Pb-free (RoHS-compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A12 | Address Inputs | 13-bit address bus; selects one of 8192 memory locations |
| I/O0–I/O7 | Bidirectional Data Bus | Tri-state I/O lines shared for read and write; high-impedance when deselected or during write |
| CE1 | Active LOW Chip Enable | Primary enable; forces automatic power-down when HIGH, critical for system-level energy budgeting |
| CE2 | Active HIGH Chip Enable | Secondary enable; must be HIGH for any access; enables AND-gated chip selection |
| OE | Active LOW Output Enable | Controls output driver state independently of CE; allows read data gating without deselecting chip |
| WE | Active LOW Write Enable | Controls direction of I/O bus; LOW initiates write, HIGH enables read output |
| VCC, GND | Power Supply | Single 5V supply; no separate VDD/VSS or backup battery required |
Key Features
| Feature | Design Value |
|---|---|
| Dual CE architecture (CE1/CE2) | Enables scalable memory maps using standard 3-to-8 decoders without additional glue logic |
| Automatic CE1 power-down | Reduces standby current to ≤40 mA (industrial), eliminating need for external power gating |
| 55 ns access with 5V supply | Meets timing requirements of 80C51, Z80, and 68000-based controllers at full speed |
| TTL-compatible I/O | Direct interface to legacy microprocessor buses without level translators or pull-up resistors |
| Alpha particle immunity | Die coat protection ensures reliable operation in high-radiation environments (e.g., industrial PLCs) |
Applications
| Industrial PLC Memory Buffer | Legacy Microcontroller Data RAM |
|---|---|
Use Scenario: Storing real-time I/O status and ladder logic variables in programmable logic controllers operating continuously at 70°C ambient. IC Role / Device Role / Timing Role: Byte-accessible, non-refreshing SRAM serving as primary working memory for scan-cycle execution. Use Value: 55 ns tAA and –40°C to +85°C rating ensure deterministic response under thermal stress; CE1 power-down cuts idle power by >70% during watchdog sleep intervals. | Use Scenario: Providing general-purpose RAM for Z80 or 8085-based embedded systems where board space and BOM count are constrained. IC Role / Device Role / Timing Role: Standalone 64 Kbit data memory interfaced directly to 8-bit multiplexed address/data buses. Use Value: TTL-compatible I/O and single 5V supply eliminate level shifters and auxiliary regulators; 28-pin SOIC fits dense PCB layouts. |
| Motor Drive Control Register Bank | Medical Instrument Data Cache |
Use Scenario: Holding PWM duty cycle registers, fault flags, and calibration coefficients in brushless DC motor controllers exposed to EMI and vibration. IC Role / Device Role / Timing Role: Nonvolatile-independent storage for configuration-critical parameters updated infrequently but read frequently. Use Value: CE2-controlled selection isolates RAM during firmware updates; alpha-immune die coat prevents bit flips from switching noise. | Use Scenario: Caching sensor acquisition buffers in portable ECG or pulse oximeter units requiring long battery life and clinical-grade reliability. IC Role / Device Role / Timing Role: Low-power, fast-access scratchpad memory supporting burst ADC reads and FIFO management. Use Value: ISB1 ≤40 mA at +85°C extends battery runtime; 55 ns access enables real-time waveform reconstruction without CPU stalling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C6264-55SIN | 55 ns access, same 8K×8 organization, but uses different CE polarity (CE active LOW only, no CE2) | Lacks hierarchical chip select; requires redesign of address decoder logic | Select only if simplifying CE logic is prioritized over multi-device expandability |
| IS62WV6416BLL-55NLI | 16-bit bus width (64K×16), 55 ns, 3.3V core; includes BYTE# control for 8-bit access | Requires voltage translation and bus-width adaptation; higher density but not drop-in | Choose when future-proofing for wider data paths or migrating to 3.3V systems |
Compared with AS6C6264-55SIN and IS62WV6416BLL-55NLI, the CY6264-55SNXI uniquely supports dual CE logic for seamless bank switching in legacy 5V systems, retains full pin compatibility with original Cypress designs, and delivers guaranteed industrial-temp performance without voltage translation overhead.
Availability
CY6264-55SNXI is available at Aetrix Electronics and suitable for industrial PLCs, legacy microcontroller upgrades, motor drive control modules, and medical instrument data buffering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY6264-55SNXI 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 U.S.-based semiconductor company specializing in memory, PSoC, and USB solutions, founded in 1982 and headquartered in San Jose, CA.
The CY6264 belongs to Cypress's legacy parallel SRAM product line, designed specifically for drop-in replacement of obsolete 28-pin 5V SRAMs in industrial and automotive-qualified systems requiring long-term availability and proven reliability.
FAQ
What is the maximum clock frequency supported by CY6264-55SNXI?
The CY6264-55SNXI is an asynchronous SRAM and does not use a clock signal. Its maximum effective bus frequency is determined by access time: with 55 ns tAA and tRC, it supports sustained read/write cycles up to ~12 MHz in systems with zero wait states. Timing margins depend on board layout, load capacitance, and controller setup/hold compliance.
Can CY6264-55SNXI operate at 3.3V?
No. The CY6264-55SNXI is specified only for 5V ±10% operation (4.5V–5.5V). Applying 3.3V violates the absolute maximum input voltage rating and will result in undefined behavior, failed reads/writes, or permanent damage. For 3.3V systems, consider Infineon's newer low-voltage SRAM families like the CY62167 series.
Is the CY6264-55SNXI RoHS-compliant?
Yes. The "X" suffix in CY6264-55SNXI denotes Pb-free (RoHS-compliant) construction, confirmed in Cypress's ordering information table. The package uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3) requirements.
How does CE1 power-down differ from CE2 deactivation?
CE1 HIGH triggers automatic internal power-down, reducing ICC to ≤40 mA (industrial) while retaining memory contents. CE2 LOW simply disables the chip without power reduction - the device remains fully powered but unresponsive. Both conditions place I/O in high-Z, but only CE1 HIGH delivers measurable quiescent current savings.
CY6264-55SNXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- MOBL™
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOIC
CY6264-55SNXI FAQ
1.How can I place an order for CY6264-55SNXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY6264-55SNXI 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 CY6264-55SNXI reliable?
The price and inventory of CY6264-55SNXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY6264-55SNXI is usually 5 days.
3.What payment methods are accepted for CY6264-55SNXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY6264-55SNXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY6264-55SNXI?
CY6264-55SNXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY6264-55SNXI 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 CY6264-55SNXI?
For technical support, including CY6264-55SNXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY6264-55SNXI requirements.
6.How does Aetrix verify that CY6264-55SNXI is sourced from the original manufacturer or authorized distributors?
All CY6264-55SNXI 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 CY6264-55SNXI meets industry standards.
7.What is the process for return or replacement of CY6264-55SNXI?
All CY6264-55SNXI units undergo pre-shipment inspection (PSI). If there is an issue with CY6264-55SNXI, 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 CY6264-55SNXI part is unused and in its original packaging.
Return procedure for CY6264-55SNXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY6264-55SNXI Tags
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