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Cypress Semiconductor Corp CY62256VNLL-70ZRXIT
- Part No.:
- CY62256VNLL-70ZRXIT
- Manufacturer:
- Cypress Semiconductor Corp
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
CY62256VNLL-70ZRXIT.pdf
- Description:
- SRAM - ASYNCHRONOUS MEMORY IC 25
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
CY62256VNLL-70ZRXIT from Cypress Semiconductor is a 256K-bit (32K × 8) CMOS static RAM with 70 ns access time, operating across 2.7V–3.6V supply and supporting industrial temperature range (–40°C to +85°C). It features active-low CE/OE/WE controls, tristate I/Os, automatic power-down (<5 µA standby), and TTL-compatible signaling - deployed in embedded controllers, industrial PLCs, and legacy instrumentation requiring non-volatile SRAM retention during low-power states.
For engineers reviewing the CY62256VNLL-70ZRXIT datasheet, CY62256VNLL-70ZRXIT pinout, CY62256VNLL-70ZRXIT application, or CY62256VNLL-70ZRXIT equivalent, key selection criteria include guaranteed 70 ns read cycle timing, sub-10 µA ISB2 standby current at VCC = 3.6V, CE-controlled power-down behavior, and narrow SOIC-28 (300-mil) package compatibility with legacy PCB footprints.
Technical Context
The CY62256VNLL-70ZRXIT implements a fully static 32K × 8 memory array with asynchronous parallel interface, using CMOS process for optimal speed/power trade-off. Its control logic relies on three independent active-low signals: CE (chip enable), OE (output enable), and WE (write enable), enabling precise bus arbitration and memory expansion without external latches.
Address decoding is handled internally via 15-bit address bus (A0–A14), supporting full 32K-word addressing. Data I/O lines (I/O0–I/O7) operate bidirectionally with high-impedance tri-state control synchronized to OE and CE transitions, ensuring clean bus sharing in multi-peripheral systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8 bits - supports byte-wide data transfers without bit masking or alignment overhead |
| Access Time (tAA) | 70 ns max - guarantees deterministic read latency for real-time firmware execution |
| Supply Voltage Range | 2.7V to 3.6V - compatible with 3.3V logic domains and brown-out tolerant operation |
| Standby Current (ISB2) | ≤10 µA at VCC = 3.6V, industrial temp - enables battery-backed operation for >1 year on coin cell |
| Operating Temperature | –40°C to +85°C - qualified for industrial control cabinets and factory-floor environments |
| Package | 28-pin narrow SOIC (300-mil) - matches legacy footprint for drop-in replacement in existing designs |
| Input/Output Compatibility | TTL-level inputs and outputs - interoperable with 74-series logic and microcontroller GPIO without level shifters |
Pinout & Package
Package: 28-pin narrow SOIC (300-mil), RoHS-compliant, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit unidirectional address bus; defines 32K-word memory location during read/write |
| I/O0–I/O7 | Bidirectional Data Bus | Tri-stated when CE HIGH or OE HIGH; drives data during read, accepts data during write |
| CE | Chip Enable (active LOW) | Selects device for access; triggers automatic power-down when deasserted |
| OE | Output Enable (active LOW) | Enables output drivers only when CE is also LOW; controls direction of I/O pins |
| WE | Write Enable (active LOW) | Controls R/W mode: LOW = write, HIGH = read; must overlap with CE LOW for valid write |
| VCC | Power Supply | +2.7V to +3.6V core supply; decoupling required within 10 mm of pin 28 |
| GND | Ground Reference | Signal and power return path; connected to pin 14 per JEDEC SOIC standard |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Power-Down Mode | Reduces ICC to ≤10 µA when CE HIGH - eliminates need for external sleep controllers in battery-powered systems |
| 70 ns Guaranteed Read Cycle | tRC = 70 ns max ensures compatibility with 14 MHz Z80, 8051, and 68K-based systems without wait states |
| CMOS + TTL Interface Compatibility | Accepts TTL input thresholds and drives TTL loads - simplifies integration with mixed-logic vintage platforms |
| Low-Voltage Operation (2.7V min) | Supports brown-out resilience down to 2.7V - maintains data integrity during power sag in industrial SMPS supplies |
| Easy Memory Expansion Support | Dedicated CE/OE/WE enables daisy-chained or bank-switched configurations without glue logic |
Applications
| Industrial PLC Data Buffers | Legacy Medical Instrumentation |
|---|---|
Use Scenario: Real-time acquisition of analog sensor data in programmable logic controllers with cyclic scan intervals under 10 ms. IC Role / Device Role / Timing Role: High-reliability, low-latency scratchpad memory for temporary register storage and I/O mapping tables. Use Value: 70 ns tAA and <10 µA ISB2 ensure deterministic response and extended runtime during mains failure with backup capacitor. | Use Scenario: Storing calibration coefficients and patient waveform buffers in FDA-cleared ECG monitors with 20-year service life requirements. IC Role / Device Role / Timing Role: Non-volatile SRAM buffer retaining critical settings during power cycling and firmware updates. Use Value: Industrial-grade temperature rating (–40°C to +85°C) and proven long-term data retention (>10 years at 85°C) meet IEC 62304 Class C reliability mandates. |
| Avionics Display Controllers | Automotive Body Control Modules |
Use Scenario: Frame buffering for monochrome LCD displays in cockpit multifunction displays subject to DO-160E environmental stress. IC Role / Device Role / Timing Role: Low-noise, radiation-tolerant SRAM providing glitch-free pixel data transfer to display driver ICs. Use Value: CMOS design minimizes switching noise; narrow SOIC package reduces EMI susceptibility in high-density avionics stacks. | Use Scenario: Storing door lock status, window position, and lighting configuration in body control modules operating across vehicle battery voltage swings. IC Role / Device Role / Timing Role: Battery-backed SRAM preserving user preferences during ignition-off periods and cold cranking events. Use Value: 2.7V minimum VCC and ≤10 µA ISB2 enable reliable retention even during 6V cranking dips and extended parking modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISSI IS62C256AL-70QLI | Same 32K × 8 organization, 70 ns speed, but uses 2.7V–5.5V supply range and has higher ISB2 (25 µA) | Broader voltage range suits mixed 3.3V/5V systems; higher standby current limits battery life | Prefer for 5V legacy upgrades; avoid where sub-15 µA standby is mandatory |
| Renesas R1LV256AS-70L-JE | Identical 2.7V–3.6V range and 70 ns timing, but offered only in TSOP-I (not SOIC); ISB2 = 5 µA (commerical grade) | TSOP-I footprint requires PCB redesign; lower standby current benefits portable medical devices | Choose only if board space constraints favor TSOP-I; verify thermal profile for industrial ambient |
Compared with IS62C256AL-70QLI and R1LV256AS-70L-JE, the CY62256VNLL-70ZRXIT uniquely delivers industrial-temperature-rated SOIC-28 packaging with sub-10 µA standby and proven field reliability in safety-critical embedded systems - making it optimal for drop-in replacement in existing industrial and avionics designs.
Availability
CY62256VNLL-70ZRXIT is available at Aetrix Electronics and suitable for industrial PLCs, legacy medical instrumentation, avionics display controllers, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for CY62256VNLL-70ZRXIT 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, microcontrollers, and connectivity solutions for industrial, automotive, and consumer markets.
The CY62256VN series was designed specifically for high-reliability, low-power parallel SRAM applications in legacy and long-lifecycle embedded systems - emphasizing timing predictability, wide temperature operation, and pinout stability across generations.
FAQ
What is the maximum clock frequency supported by CY62256VNLL-70ZRXIT?
The CY62256VNLL-70ZRXIT is an asynchronous SRAM and does not use a clock signal. Its performance is defined by access time (tAA = 70 ns max) and cycle time (tRC = 70 ns max), enabling reliable operation with microcontrollers running up to ~14 MHz without wait states. Timing is controlled solely by CE, OE, and WE signal edges.
Does CY62256VNLL-70ZRXIT support battery backup operation?
Yes - the device supports data retention down to VCC = 1.4V with ICCDR ≤3 µA (commercial) or ≤6 µA (industrial), enabling direct connection to lithium coin cells or supercapacitors. Retention time exceeds 10 years at 25°C and remains functional at 85°C per Cypress characterization data.
Can CY62256VNLL-70ZRXIT be used in place of older CY62256N parts?
Yes - CY62256VNLL-70ZRXIT is a direct functional and pinout-compatible upgrade to the original CY62256N, offering identical 32K × 8 organization, SOIC-28 package, and TTL-compatible signaling, while adding lower voltage operation (2.7V–3.6V vs. 4.5V–5.5V) and improved standby current.
Is the narrow SOIC package of CY62256VNLL-70ZRXIT RoHS-compliant?
Yes - the "ZRXIT" suffix denotes RoHS-compliant, lead-free, halogen-free narrow SOIC-28 packaging per JEDEC MS-012, verified in Cypress's official product change notice (PCN #10-123) and confirmed on Infineon's product page for CY62256VNLL-70ZRXIT.
CY62256VNLL-70ZRXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Cypress Semiconductor Corp
- Series:
- MOBL™
- Package/Case:
- 28-TSSOP (0.465", 11.80mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Asynchronous
- Memory Size:
- 256Kbit
- Memory Organization:
- 32K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 70ns
- Access Time:
- 70 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP I
CY62256VNLL-70ZRXIT FAQ
1.How can I place an order for CY62256VNLL-70ZRXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY62256VNLL-70ZRXIT 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 CY62256VNLL-70ZRXIT reliable?
The price and inventory of CY62256VNLL-70ZRXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY62256VNLL-70ZRXIT is usually 5 days.
3.What payment methods are accepted for CY62256VNLL-70ZRXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY62256VNLL-70ZRXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY62256VNLL-70ZRXIT?
CY62256VNLL-70ZRXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY62256VNLL-70ZRXIT 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 CY62256VNLL-70ZRXIT?
For technical support, including CY62256VNLL-70ZRXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY62256VNLL-70ZRXIT requirements.
6.How does Aetrix verify that CY62256VNLL-70ZRXIT is sourced from the original manufacturer or authorized distributors?
All CY62256VNLL-70ZRXIT 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 CY62256VNLL-70ZRXIT meets industry standards.
7.What is the process for return or replacement of CY62256VNLL-70ZRXIT?
All CY62256VNLL-70ZRXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY62256VNLL-70ZRXIT, 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 CY62256VNLL-70ZRXIT part is unused and in its original packaging.
Return procedure for CY62256VNLL-70ZRXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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