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Infineon Technologies CY62256NLL-55ZXIT
- Part No.:
- CY62256NLL-55ZXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
CY62256NLL-55ZXIT.pdf
- Description:
- IC SRAM 256KBIT PAR 28TSOP I
- Quantity:
- Payment:
- Shipping:
Inventory:3,615
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Product details
Overview
CY62256NLL-55ZXIT from Infineon Technologies (formerly Cypress Semiconductor) is a 256-Kbit (32 K × 8) high-speed CMOS static RAM with 55 ns access time, 4.5 V to 5.5 V operation, and industrial temperature range (–40 °C to +85 °C). It features TTL-compatible I/O, automatic CE-controlled power-down, and low standby power (82.5 µW max), deployed in embedded controllers and legacy industrial instrumentation requiring non-volatile SRAM retention during sleep modes.
For engineers reviewing the CY62256NLL-55ZXIT datasheet, CY62256NLL-55ZXIT pinout, CY62256NLL-55ZXIT application, or CY62256NLL-55ZXIT equivalent, key selection criteria include verified 55 ns read cycle time, 28-pin TSOP I package mapping, CE/OE/WE control logic compatibility, and documented ISB2 ≤ 10 µA at VCC = 5.5 V and TA = 85 °C.
Technical Context
The CY62256NLL-55ZXIT implements a fully static 32K × 8 memory array with asynchronous parallel interface. Its dual active-low control architecture uses CE for chip select, OE for output enable, and WE for write direction-enabling precise timing control without clocks or refresh cycles.
It delivers deterministic 55 ns tRC and tAA under industrial conditions, with automatic power-down reducing ICC to ≤ 0.1 µA when CE is HIGH and inputs are CMOS-compliant. Data retention operates down to VCC = 2.0 V, supporting battery-backed hold modes in safety-critical systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 256 Kbit (32 K × 8) - supports byte-wide data bus interfacing without external multiplexing |
| Access time | 55 ns - guarantees deterministic read latency for real-time microcontroller bus cycles |
| Voltage range | 4.5 V to 5.5 V - compatible with legacy 5 V TTL and CMOS system rails |
| Standby current | ≤ 10 µA (ISB2, industrial temp) - enables multi-year battery backup in maintenance-free field devices |
| Operating temp | –40 °C to +85 °C - qualified for industrial control cabinets and automotive body electronics |
| Package | 28-pin TSOP I (Z suffix) - surface-mount footprint with 0.55 mm pitch, JEDEC MO-141 compliant |
| Data retention VCC | 2.0 V minimum - sustains memory contents during brown-out or backup battery transition |
Pinout & Package
28-pin TSOP I (Thin Small Outline Package, Type I), 8.1 mm × 13.4 mm body, 0.55 mm lead pitch, gull-wing leads, RoHS-compliant (XIT suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address input | 15-bit address bus (32 K locations); driven by MPU/MCU address lines A0–A14 |
| I/O0–I/O7 | Bidirectional data | 8-bit data bus; tristated when CE HIGH or OE HIGH; shared for read/write |
| CE | Chip enable | Active LOW; enables device and initiates automatic power-down when deasserted |
| OE | Output enable | Active LOW; controls I/O direction - outputs when LOW, inputs when HIGH |
| WE | Write enable | Active LOW; determines read (WE HIGH) vs. write (WE LOW) during CE LOW |
| VCC | Power supply | +4.5 V to +5.5 V; decoupling capacitor required within 10 mm of pin 28 |
| GND | Ground reference | Pins 14 and 21 provide dedicated ground paths for signal and power integrity |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE power-down | Reduces ICC to ≤ 0.1 µA when CE is HIGH, eliminating need for external sleep controllers |
| TTL-compatible I/O | VIH = 2.2 V min, VOL = 0.4 V max - interoperable with legacy 5 V microcontrollers without level shifters |
| Tristate output drivers | OE-controlled high-impedance state prevents bus contention in multi-SRAM systems |
| Low leakage at high temp | ISB2 ≤ 10 µA at +85 °C - ensures stable standby in uncooled industrial enclosures |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Real-time status logging and configuration storage in programmable logic controller backplanes with intermittent power. IC Role / Device Role / Timing Role: Non-refreshing SRAM buffer holding I/O state maps and firmware patch tables during CPU idle cycles. Use Value: 55 ns access enables direct MPU bus coupling without wait states; 82.5 µW standby extends battery life in remote nodes. | Use Scenario: Storing door lock actuation history and lighting calibration data in vehicle body domain controllers. IC Role / Device Role / Timing Role: Battery-backed volatile memory retaining critical event logs across ignition cycles. Use Value: 2.0 V data retention threshold allows seamless handoff to backup coin cell during main supply dropout. |
| Legacy Medical Instrumentation | Avionics Maintenance Terminals |
Use Scenario: Temporary waveform capture buffers and calibration coefficient storage in portable ECG analyzers. IC Role / Device Role / Timing Role: High-reliability SRAM interfaced to 8-bit microcontrollers with strict EMI immunity requirements. Use Value: TSOP I package minimizes board area; 0.1 µA ISB2 meets IEC 62304 power budget constraints for Class IIa devices. | Use Scenario: Configuration scratchpad and fault log storage in line-replaceable avionics units operating in wide-temperature bays. IC Role / Device Role / Timing Role: Industrial-grade SRAM supporting DO-254-compliant data integrity under –40 °C to +85 °C thermal cycling. Use Value: Verified 55 ns tRC at full temperature range eliminates timing margin uncertainty in deterministic flight software stacks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C4008-55TIN | 4 Mbit (512 K × 8), 55 ns, 2.7–3.6 V only - no 5 V support | Requires voltage translation in 5 V systems; unsuitable for direct replacement | Select only if migrating to 3.3 V architecture and increasing capacity |
| IS62WV2568BLL-55TLI | 256 Kbit (32 K × 8), 55 ns, 2.7–3.6 V - lacks 5 V tolerance and industrial temp grade | Not rated for > +70 °C; fails automotive/industrial thermal validation | Acceptable only for commercial-temp, 3.3 V designs with identical pinout |
Compared with AS6C4008-55TIN and IS62WV2568BLL-55TLI, CY62256NLL-55ZXIT uniquely supports 5 V operation and industrial temperature range while maintaining pin-for-pin compatibility with legacy 28-pin TSOP I layouts - critical for drop-in replacement in field-deployed equipment.
Availability
CY62256NLL-55ZXIT is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and legacy medical instrumentation requiring stable component supply and long-term lifecycle assurance.
Supply support for CY62256NLL-55ZXIT 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
Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive ICs, and memory solutions with ISO 9001 and IATF 16949 certified manufacturing.
This device belongs to Infineon's legacy SRAM portfolio, originally developed by Cypress to serve industrial and automotive applications demanding high reliability, deterministic timing, and long-lifecycle support in 5 V systems.
FAQ
What is the maximum clock frequency supported by CY62256NLL-55ZXIT?
CY62256NLL-55ZXIT is an asynchronous static RAM with no internal clock. Its maximum operational speed is defined by access time: 55 ns read cycle time (tRC) supports up to ~18.2 MHz bus toggle rate. Timing depends solely on CE, OE, and WE signal transitions-not a clock signal-making it compatible with any microcontroller bus that meets the 55 ns setup/hold windows.
Does CY62256NLL-55ZXIT require external refresh circuitry?
No. As a CMOS static RAM, CY62256NLL-55ZXIT retains data indefinitely as long as power is applied and does not require refresh cycles. Its fully static design eliminates refresh overhead, simplifying system design and reducing MCU resource usage compared to DRAM or pseudo-SRAM solutions.
Can CY62256NLL-55ZXIT be used in battery-backed applications?
Yes. With data retention down to VCC = 2.0 V and standby current ≤ 10 µA at +85 °C, it is explicitly designed for battery-backed operation. When CE is HIGH and VCC drops to 2.0 V, the device enters data retention mode-preserving contents for years using a single CR2032 or equivalent backup cell.
Is the TSOP I package of CY62256NLL-55ZXIT RoHS-compliant?
Yes. The "XIT" suffix denotes lead-free (Pb-free) construction per EU RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 3. The package uses matte tin terminations and complies with IPC/JEDEC J-STD-033 handling requirements for reflow soldering.
CY62256NLL-55ZXIT 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:
- 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-TSOP I
CY62256NLL-55ZXIT FAQ
1.How can I place an order for CY62256NLL-55ZXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY62256NLL-55ZXIT 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 CY62256NLL-55ZXIT reliable?
The price and inventory of CY62256NLL-55ZXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY62256NLL-55ZXIT is usually 5 days.
3.What payment methods are accepted for CY62256NLL-55ZXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY62256NLL-55ZXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY62256NLL-55ZXIT?
CY62256NLL-55ZXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY62256NLL-55ZXIT 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 CY62256NLL-55ZXIT?
For technical support, including CY62256NLL-55ZXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY62256NLL-55ZXIT requirements.
6.How does Aetrix verify that CY62256NLL-55ZXIT is sourced from the original manufacturer or authorized distributors?
All CY62256NLL-55ZXIT 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 CY62256NLL-55ZXIT meets industry standards.
7.What is the process for return or replacement of CY62256NLL-55ZXIT?
All CY62256NLL-55ZXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY62256NLL-55ZXIT, 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 CY62256NLL-55ZXIT part is unused and in its original packaging.
Return procedure for CY62256NLL-55ZXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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