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Infineon Technologies CY62256VNLL-70ZXIT
- Part No.:
- CY62256VNLL-70ZXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
CY62256VNLL-70ZXIT.pdf
- Description:
- IC SRAM 256KBIT PAR 28TSOP I
- Quantity:
- Payment:
- Shipping:
Inventory:2,826
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Product details
Overview
CY62256VNLL-70ZXIT from Cypress Semiconductor is a 256-Kbit (32 K × 8) CMOS static RAM with 70 ns access time, operating across 2.7 V–3.6 V supply, and rated for industrial temperature range (–40 °C to +85 °C). It features active-low CE/OE/WE controls, tristate I/Os, automatic power-down reducing standby current to 0.1 µA, and TTL-compatible signaling - deployed in embedded controllers requiring non-volatile SRAM buffering with deterministic timing.
For engineers reviewing the CY62256VNLL-70ZXIT datasheet, CY62256VNLL-70ZXIT pinout, CY62256VNLL-70ZXIT application, or CY62256VNLL-70ZXIT equivalent, key selection criteria include guaranteed 70 ns read cycle time, sub-1 µA industrial-grade standby current, 28-pin narrow SOIC package compatibility, and CE-controlled automatic power-down behavior under deselected conditions.
Technical Context
The CY62256VNLL-70ZXIT implements a fully static 32K × 8 memory array with asynchronous parallel interface. Its dual-level chip enable (CE) and output enable (OE) logic enables seamless memory expansion in multi-bank systems without external glue logic.
It uses CMOS process technology to achieve optimal speed-power trade-off: 11 mA typical active ICC at 3.6 V and 70 ns operation, while delivering 0.1 µA ISB2 standby current under CMOS input conditions - critical for battery-backed or low-duty-cycle applications where data retention must persist during extended sleep states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 32 K × 8 bits = 256 Kbit; supports byte-wide data bus interfacing without address multiplexing |
| Access time | 70 ns max tAA; guarantees deterministic read latency for real-time control loops |
| VCC range | 2.7 V to 3.6 V; compatible with 3.3 V system rails and tolerant of ±0.3 V supply variation |
| Standby current | 0.1 µA typ (ISB2, CMOS inputs); enables >10-year data retention on coin-cell backup |
| Operating temp | –40 °C to +85 °C; qualified for industrial environments including factory automation and motor drives |
| Package | 28-pin narrow SOIC (300-mil); surface-mount compatible with standard reflow profiles |
| Input compatibility | TTL-compatible VIH/VIL thresholds; interfaces directly with legacy microcontrollers and FPGAs |
Pinout & Package
Package: 28-pin narrow SOIC (300-mil), RoHS-compliant, body width 7.6 mm, lead pitch 1.27 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address inputs | 15-bit address bus supporting full 32K-word decoding; no internal latching required |
| I/O0–I/O7 | Bidirectional data lines | Tristate-enabled I/O pins; direction controlled by OE/WE state, eliminating need for external transceivers |
| CE | Chip enable | Active-low global select; initiates automatic power-down when HIGH, reducing ICC to sub-µA level |
| OE | Output enable | Active-low output gate; disables outputs to high-Z when deasserted, enabling bus sharing |
| WE | Write enable | Active-low write strobe; combined with CE LOW, defines write window without requiring external timing logic |
| VCC | Power supply | Primary 2.7–3.6 V rail; decoupling capacitor placement near pin 28 minimizes switching noise |
| GND | Ground reference | Common return path for all signals; pin 14 provides dedicated ground connection per JEDEC layout |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE power-down | Reduces standby current to 0.1 µA (typ), enabling >10-year data retention on 3 V coin cell |
| 70 ns read cycle time | Guaranteed tRC ≤ 70 ns ensures compatibility with 14 MHz bus clocks in microcontroller systems |
| CMOS + TTL compatibility | Accepts both CMOS and TTL logic levels on all inputs, simplifying integration with mixed-voltage designs |
| Tristate I/O architecture | Eliminates need for external bus buffers in multi-SRAM configurations or shared data bus topologies |
| Industrial temperature rating | Validated operation from –40 °C to +85 °C supports deployment in uncontrolled ambient environments |
Applications
| Industrial PLC Data Buffering | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Storing real-time sensor calibration tables and fault logs in programmable logic controllers with intermittent power. IC Role / Device Role / Timing Role: Non-volatile SRAM buffer retaining critical runtime data during brown-out events and firmware updates. Use Value: 0.1 µA ISB2 standby current extends backup battery life beyond 10 years; 70 ns access supports deterministic scan cycle timing. | Use Scenario: Holding transient engine parameters (RPM, throttle position, knock sensor history) between ECU wake cycles. IC Role / Device Role / Timing Role: High-reliability, fast-access scratchpad memory interfaced directly to 8-bit MCU data bus. Use Value: Industrial-grade temperature range (–40 °C to +85 °C) ensures operation under hood thermal stress; CE-controlled power-down reduces quiescent load. |
| Medical Infusion Pump Memory | Test & Measurement Equipment FIFO |
Use Scenario: Caching dosage history and alarm event timestamps in Class II medical devices requiring traceable data retention. IC Role / Device Role / Timing Role: Battery-backed SRAM providing tamper-resistant storage with guaranteed data integrity over device lifetime. Use Value: Sub-µA standby current preserves primary battery charge during long idle periods; 28-pin SOIC allows compact PCB layout in safety-critical assemblies. | Use Scenario: Acting as first-in-first-out buffer for digitized analog waveforms in portable oscilloscopes and signal analyzers. IC Role / Device Role / Timing Role: Asynchronous parallel SRAM providing zero-wait-state data capture at up to 14 MB/s sustained rate. Use Value: 70 ns tAA enables direct interfacing with FPGA-based acquisition engines without pipeline stalls; tristate I/O supports dynamic bus arbitration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C4008-70SCN | Same 32K × 8 organization, 70 ns speed, but 2.7–5.5 V VCC range and higher ISB (1 µA typ) | Broader voltage support suits mixed 3.3 V/5 V systems; less suitable for ultra-low-power battery backup | Select when system requires 5 V tolerance or shares rail with legacy 5 V peripherals |
| ISSI IS62WV2568BLL-70NLI | Identical pinout, 70 ns speed, 2.7–3.6 V, but 1 µA ISB (industrial grade) and no automotive qualification | Lacks AEC-Q100 compliance; not approved for under-hood automotive use | Preferred for cost-sensitive industrial designs where automotive qualification is unnecessary |
Compared with AS6C4008-70SCN and IS62WV2568BLL-70NLI, the CY62256VNLL-70ZXIT delivers the lowest verified standby current (0.1 µA) in industrial temperature grade and includes automotive-A/E variants - making it optimal for long-life, battery-constrained, or thermally demanding deployments where data retention integrity is mission-critical.
Availability
CY62256VNLL-70ZXIT is available at Aetrix Electronics and suitable for industrial PLC data buffering, automotive ECU runtime storage, medical infusion pump logging, and test equipment waveform capture requiring stable component supply and guaranteed long-term availability.
Supply support for CY62256VNLL-70ZXIT 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 product line was designed specifically for high-reliability, low-power parallel SRAM applications in space-constrained embedded systems requiring guaranteed timing, extended temperature operation, and robust data retention - especially where battery backup or intermittent power is used.
FAQ
Is CY62256VNLL-70ZXIT pin-compatible with CY62256LN-70ZC?
Yes. Both share identical 28-pin narrow SOIC pinout, address/data mapping, and control signal definitions (CE/OE/WE). The "VN" suffix denotes wider VCC range (2.7–3.6 V) versus "LN" (4.5–5.5 V), so electrical compatibility requires matching supply voltage - no physical adapter or footprint change is needed.
What is the maximum clock frequency supported for burst reads?
The CY62256VNLL-70ZXIT is an asynchronous SRAM and does not use a clock signal. Its 70 ns access time corresponds to a maximum effective bus rate of ~14.3 MHz for consecutive random reads. Burst transfers rely on external address sequencing; no internal counter or clock domain is present.
Does this device require an external refresh circuit?
No. As a static RAM, the CY62256VNLL-70ZXIT retains data indefinitely as long as VCC remains within specification and CE is held LOW during active use. No refresh cycles, timers, or external circuitry are required - unlike DRAM or pseudo-SRAM devices.
Can CY62256VNLL-70ZXIT operate at 2.5 V?
No. The absolute minimum VCC is 2.7 V per datasheet specifications. Operation below 2.7 V risks data corruption, timing violations, or failure to enter power-down mode correctly. Systems requiring 2.5 V operation must select alternative SRAMs rated for that voltage range.
CY62256VNLL-70ZXIT 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP I
CY62256VNLL-70ZXIT FAQ
1.How can I place an order for CY62256VNLL-70ZXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY62256VNLL-70ZXIT 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-70ZXIT reliable?
The price and inventory of CY62256VNLL-70ZXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY62256VNLL-70ZXIT is usually 5 days.
3.What payment methods are accepted for CY62256VNLL-70ZXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY62256VNLL-70ZXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY62256VNLL-70ZXIT?
CY62256VNLL-70ZXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY62256VNLL-70ZXIT 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-70ZXIT?
For technical support, including CY62256VNLL-70ZXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY62256VNLL-70ZXIT requirements.
6.How does Aetrix verify that CY62256VNLL-70ZXIT is sourced from the original manufacturer or authorized distributors?
All CY62256VNLL-70ZXIT 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-70ZXIT meets industry standards.
7.What is the process for return or replacement of CY62256VNLL-70ZXIT?
All CY62256VNLL-70ZXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY62256VNLL-70ZXIT, 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-70ZXIT part is unused and in its original packaging.
Return procedure for CY62256VNLL-70ZXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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