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Infineon Technologies CY62256VNLL-70ZXCT
- Part No.:
- CY62256VNLL-70ZXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
CY62256VNLL-70ZXCT.pdf
- Description:
- IC SRAM 256KBIT PAR 28TSOP I
- Quantity:
- Payment:
- Shipping:
Inventory:3,867
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Product details
Overview
CY62256VNLL-70ZXCT from Cypress Semiconductor is a 256-Kbit (32 K × 8) CMOS static RAM with 70 ns access time, 2.7 V to 3.6 V supply range, and industrial temperature rating (–40 °C to +85 °C), housed in a Pb-free 28-pin narrow SOIC package. It supports TTL-compatible I/O, automatic CE-controlled power-down (<5 µA standby), and tristate bidirectional data lines for embedded microcontroller memory expansion.
For engineers reviewing the CY62256VNLL-70ZXCT datasheet, CY62256VNLL-70ZXCT pinout, CY62256VNLL-70ZXCT application, or CY62256VNLL-70ZXCT equivalent, key selection criteria include its 70 ns read cycle time, low-voltage operation, CE/OE/WE control logic compatibility with 8-bit microcontrollers, and verified industrial-grade reliability across extended temperature ranges.
Technical Context
The CY62256VNLL-70ZXCT implements a fully static 32K × 8 memory array with asynchronous parallel interface. Its dual-control enable architecture uses active-low CE for chip selection and active-low OE for output gating, enabling seamless bank expansion without external logic. The WE signal determines read/write direction on shared I/O0–I/O7 pins.
Power management relies on automatic CE-driven power-down mode, reducing ICC to ≤5 µA (ISB2) when CE is high and inputs are at valid logic levels. All timing parameters-including tAA (70 ns), tDOE (35 ns), and tPD (70 ns)-are guaranteed over full industrial voltage (2.7–3.6 V) and temperature (–40 °C to +85 °C) ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 256 Kbit (32 K × 8) - provides 32,768 bytes of byte-addressable SRAM for 8-bit MCU systems |
| Access time | 70 ns - ensures compatibility with 14 MHz Z80, 8051, and similar legacy microcontrollers |
| Supply voltage | 2.7 V to 3.6 V - supports single-supply operation in battery-backed or low-voltage industrial systems |
| Standby current | ≤5 µA (ISB2, industrial temp) - enables >1-year data retention on coin-cell backup |
| Operating current | ≤30 mA (ICC, max) - allows direct interfacing with standard GPIO without current-limiting resistors |
| Temperature range | –40 °C to +85 °C - qualified for industrial control, motor drives, and factory automation environments |
| Input/output compatibility | TTL-level - eliminates need for level-shifting when interfacing with 5 V logic families |
Pinout & Package
Package: 28-pin narrow SOIC (300-mil), Pb-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address input | 15-bit address bus supporting full 32K-word decoding without external demultiplexing |
| I/O0–I/O7 | Bidirectional data line | Tristate-capable 8-bit data bus sharing pins for read and write operations |
| CE | Chip enable | Active-low global select; forces automatic power-down when deasserted |
| OE | Output enable | Active-low output gate; controls I/O direction independently of CE and WE |
| WE | Write enable | Active-low write strobe; determines data flow direction on I/O lines during CE assertion |
| VCC | Power supply | Single 2.7–3.6 V supply; no separate VDD/VSS required for core or I/O |
| GND | Ground reference | Common return path for all signals and power; decoupling capacitor placement critical near Pin 14 |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE power-down | Reduces standby current to ≤5 µA without external control logic or sleep-mode firmware |
| Asynchronous parallel interface | Eliminates clock domain synchronization overhead-ideal for glueless integration with legacy MCUs |
| Tristate I/O with independent OE | Enables multi-drop bus architectures where multiple SRAMs share data lines without contention |
| Industrial temperature qualification | Guaranteed functionality across –40 °C to +85 °C without derating or thermal margin planning |
| Pb-free narrow SOIC packaging | Supports automated reflow assembly per JEDEC J-STD-020D and IPC-A-610 Class 2 standards |
Applications
| Industrial PLC Memory Buffer | Automotive ECU Data Log |
|---|---|
Use Scenario: Storing real-time sensor values and control state in programmable logic controllers with cyclic scan times under 10 ms. IC Role / Device Role / Timing Role: Byte-accessible SRAM buffer interfaced directly to 8-bit microcontroller data bus with CE/OE/WE handshaking. Use Value: 70 ns access time meets tight scan-cycle deadlines; low ISB2 enables energy-efficient logging during idle cycles. | Use Scenario: Capturing CAN bus diagnostic frames and engine parameter snapshots during vehicle ignition-off events. IC Role / Device Role / Timing Role: Nonvolatile data retention buffer backed by supercapacitor, leveraging VDR ≥1.4 V and ICCDR ≤6 µA. Use Value: Industrial-grade temperature tolerance ensures reliable operation in under-hood ECU enclosures up to +85 °C ambient. |
| Medical Infusion Pump Control RAM | Legacy Industrial HMI Display Cache |
Use Scenario: Holding dosage configuration, alarm thresholds, and runtime calibration data in Class II medical devices requiring long-term data integrity. IC Role / Device Role / Timing Role: Primary working RAM for safety-critical ARM7-based controller, accessed via synchronous bus interface with wait-state generation. Use Value: Guaranteed 70 ns tAA and tRC ensure deterministic response to watchdog-triggered memory dumps without timing violations. | Use Scenario: Caching graphical assets and menu structures for monochrome LCD displays in factory-floor HMIs using 8051 derivatives. IC Role / Device Role / Timing Role: External memory mapped into microcontroller's external data space using ALE-strobed address latching. Use Value: TTL-compatible I/O and 300-mil SOIC footprint allow drop-in replacement of obsolete 62256 variants without PCB redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C256-70SCN | 70 ns access, 2.7–3.6 V, but only commercial temp (0 °C to +70 °C); ISB2 = 10 µA | Lacks industrial temperature qualification; unsuitable for uncontrolled ambient deployments | Select only for cost-sensitive consumer-grade equipment with ambient temperature control |
| IS62WV2568BLL-70NLI | 70 ns access, wider voltage (2.5–3.6 V), lower ISB2 (≤1 µA), but requires 2.5 V minimum | Higher sensitivity to brown-out conditions below 2.5 V; not backward-compatible with 2.7 V-only designs | Prefer for new designs targeting ultra-low-power battery operation with regulated 2.5 V rails |
Compared with AS6C256-70SCN and IS62WV2568BLL-70NLI, the CY62256VNLL-70ZXCT uniquely balances industrial temperature support, 2.7 V minimum operation, and proven field reliability in legacy industrial systems-making it the preferred choice for retrofit and long-lifecycle deployments.
Availability
CY62256VNLL-70ZXCT is available at Aetrix Electronics and suitable for industrial PLC memory buffers, automotive ECU data loggers, medical infusion pump control RAM, and legacy industrial HMI display caches requiring stable component supply across extended product lifecycles.
Supply support for CY62256VNLL-70ZXCT 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 for industrial, automotive, and consumer markets.
The CY62256VN series was designed specifically for robust, low-power, parallel-interface SRAM replacement in long-lifecycle industrial and automotive control systems-emphasizing reliability over speed or density scaling.
FAQ
Is CY62256VNLL-70ZXCT pin-compatible with older CY62256-70PC versions?
Yes-CY62256VNLL-70ZXCT uses the identical 28-pin narrow SOIC footprint and pinout as CY62256-70PC, including matching A0–A14, I/O0–I/O7, CE, OE, WE, VCC, and GND assignments. No PCB layout changes are required for migration, though voltage and temperature specifications differ.
Does this SRAM require an external clock or refresh circuitry?
No-CY62256VNLL-70ZXCT is a fully static RAM with no internal refresh requirement. It retains data indefinitely as long as VCC remains within 2.7–3.6 V and CE is held high during standby. Clock signals are not used or supported.
What is the maximum data retention voltage (VDR) and how does it affect backup operation?
The guaranteed minimum VDR is 1.4 V. When VCC drops to ≥1.4 V and CE is high, the device enters data retention mode with ICCDR ≤6 µA (industrial grade). This enables >1 year of retention on a 0.1 F supercapacitor charged to 3.3 V, assuming leakage-dominated discharge.
Can I/O pins be driven while CE is high and OE is low?
No-when CE is high, the device is deselected and all I/O pins enter high-impedance state regardless of OE or WE status. Driving I/O pins externally during CE high violates the absolute maximum rating for output current and may cause latch-up or data corruption.
CY62256VNLL-70ZXCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP I
CY62256VNLL-70ZXCT FAQ
1.How can I place an order for CY62256VNLL-70ZXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY62256VNLL-70ZXCT 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-70ZXCT reliable?
The price and inventory of CY62256VNLL-70ZXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY62256VNLL-70ZXCT is usually 5 days.
3.What payment methods are accepted for CY62256VNLL-70ZXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY62256VNLL-70ZXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY62256VNLL-70ZXCT?
CY62256VNLL-70ZXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY62256VNLL-70ZXCT 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-70ZXCT?
For technical support, including CY62256VNLL-70ZXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY62256VNLL-70ZXCT requirements.
6.How does Aetrix verify that CY62256VNLL-70ZXCT is sourced from the original manufacturer or authorized distributors?
All CY62256VNLL-70ZXCT 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-70ZXCT meets industry standards.
7.What is the process for return or replacement of CY62256VNLL-70ZXCT?
All CY62256VNLL-70ZXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY62256VNLL-70ZXCT, 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-70ZXCT part is unused and in its original packaging.
Return procedure for CY62256VNLL-70ZXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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