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Infineon Technologies CY62256NLL-55ZXA
- Part No.:
- CY62256NLL-55ZXA
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
CY62256NLL-55ZXA.pdf
- Description:
- IC SRAM 256KBIT PAR 28TSOP I
- Quantity:
- Payment:
- Shipping:
Inventory:4,375
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Product details
Overview
CY62256NLL-55ZXA from Infineon Technologies (formerly Cypress) is a 256-Kbit (32 K × 8) CMOS static RAM with 55 ns access time, 4.5–5.5 V operation, and industrial temperature range (–40 °C to +85 °C). It features TTL-compatible I/O, automatic CE-controlled power-down, and tristate outputs-used in embedded controllers, industrial PLCs, and legacy instrumentation memory buffers.
For engineers reviewing the CY62256NLL-55ZXA datasheet, CY62256NLL-55ZXA pinout, CY62256NLL-55ZXA application, or CY62256NLL-55ZXA equivalent, key selection criteria include guaranteed 55 ns read cycle time, ≤50 mA active current at 5 V, ≤10 µA standby current (CMOS input mode), and 28-pin narrow SOIC package compatibility with legacy board layouts.
Technical Context
The CY62256NLL-55ZXA implements a fully static 32K × 8 memory array with asynchronous parallel interface. Address decoding uses 15-bit A0–A14 inputs; data I/O0–I/O7 operate bidirectionally under control of CE, OE, and WE signals. Its automatic power-down reduces ISB2 to 10 µA when CE is HIGH and inputs are at valid logic levels.
Timing is defined by strict AC parameters: tRC = 55 ns max, tAA = 55 ns max, tDOE = 25 ns max, and tPD = 55 ns max. The device supports three write modes-including WE-controlled writes with OE LOW-and guarantees data retention down to 2.0 V with ICCDR ≤ 10 µA at industrial temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256 Kbit (32 K × 8) - provides byte-wide addressing for microcontroller data storage without external bus widening |
| Access Time | 55 ns - enables direct interfacing with 12–15 MHz 8/16-bit MCUs without wait states |
| VCC Range | 4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS logic rails and legacy power supplies |
| Active Current (ICC) | ≤50 mA max - limits thermal load in dense PCB layouts with multiple SRAMs |
| Standby Current (ISB2) | ≤10 µA max (CMOS inputs) - supports low-power sleep modes in battery-backed systems |
| Operating Temp | –40 °C to +85 °C - qualified for industrial automation and transportation control environments |
| Data Retention VCC | 2.0 V min - maintains stored data during brown-out or backup-battery operation |
Pinout & Package
Package: 28-pin narrow SOIC (300-mil), RoHS-compliant, surface-mountable with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Input | 15-bit address bus - selects one of 32,768 memory locations; no internal latching required |
| I/O0–I/O7 | Input/Output | Bidirectional data bus - high-impedance when CE HIGH or OE HIGH, eliminating need for external bus transceivers |
| CE | Input/Control | Chip Enable (active LOW) - primary enable for power-down; asserts automatic ISB2 reduction when deasserted |
| OE | Input/Control | Output Enable (active LOW) - controls I/O direction; tristates outputs when HIGH to prevent bus contention |
| WE | Input/Control | Write Enable (active LOW) - initiates write cycle when CE also LOW; determines write timing reference edge |
| VCC | Power Supply | +4.5 V to +5.5 V supply - powers core logic and I/O drivers; decoupling capacitor required per datasheet layout |
| GND | Ground | Reference return path - must be connected to system ground plane with low-inductance trace |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible I/O | VIH = 2.2 V min, VOL = 0.4 V max - interoperates directly with 5 V microcontrollers and FPGAs without level shifters |
| Automatic CE power-down | ISB2 ≤ 10 µA at +85 °C - eliminates need for external power-gating circuitry in low-duty-cycle systems |
| Tristate output drivers | tHZOE ≤ 25 ns, tLZOE ≤ 5 ns - ensures clean bus release and fast turnaround for multi-SRAM systems |
| Industrial temperature grade | –40 °C to +85 °C operation - validated across full range with no derating of speed or current specs |
| Legacy package footprint | 28-pin narrow SOIC (300-mil) - drop-in replacement for CY62256N-55SN and similar 5 V SRAMs in existing designs |
Applications
| Industrial PLC Data Buffer | Medical Instrumentation Memory |
|---|---|
Use Scenario: Stores real-time sensor calibration tables and runtime configuration in DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: Asynchronous parallel SRAM providing zero-wait-state data access for ARM Cortex-M4-based control engines. Use Value: 55 ns tAA ensures deterministic response to analog input interrupts; ISB2 ≤ 10 µA extends uptime during mains failure with supercapacitor backup. |
Use Scenario: Holds patient waveform history and firmware patch data in portable ECG monitors. IC Role / Device Role / Timing Role: Nonvolatile-supporting volatile buffer interfaced to MSP430FR59xx FRAM controller via 8-bit parallel bus. Use Value: VDR = 2.0 V allows retention during 10-second battery switchover; narrow SOIC fits compact 4-layer PCBs with tight thermal constraints. |
| Automotive Diagnostic Tool RAM | Legacy Industrial HMI Cache |
Use Scenario: Caches OBD-II protocol translation tables and CAN message queues in handheld diagnostic scanners. IC Role / Device Role / Timing Role: Standalone SRAM co-located with STM32F103 MCU; accessed during CAN frame parsing bursts. Use Value: –40 °C to +85 °C rating meets AEC-Q100 Grade 3 requirements; tRC = 55 ns supports 18 MB/s burst reads without DMA stalls. |
Use Scenario: Serves as display refresh buffer and command queue in 2000s-era factory HMIs using Intel 80C188EB processors. IC Role / Device Role / Timing Role: Pin-compatible upgrade for obsolete HM62256LP-10 chips; retains same 28-pin SOIC footprint. Use Value: Identical timing and electrical behavior enables direct BOM swap; no PCB or firmware changes required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISSI IS62C256AL-55QLI | Same 32K × 8 organization, 55 ns access, but 2.7–5.5 V VCC range and 100 µA ISB2 at +85 °C | Wider voltage range suits mixed-voltage systems; higher standby current limits use in ultra-low-power sleep modes | Select if dual-supply flexibility outweighs 10× higher ISB2; verify layout compatibility with 28-pin SOIC-300 |
| Renesas R1LV256AS-55SI#S0 | Identical 55 ns speed and 4.5–5.5 V range, but only commercial temp (0 °C to +70 °C) and 20 µA ISB2 | Limited to non-industrial ambient conditions; lower standby current than CY62256NLL but not rated for extended temperature | Choose for cost-sensitive consumer-grade equipment where industrial temp qualification is unnecessary |
Compared with IS62C256AL-55QLI and R1LV256AS-55SI#S0, the CY62256NLL-55ZXA uniquely delivers industrial temperature operation *with* sub-10 µA standby current and guaranteed 55 ns timing-making it the sole option for thermally demanding, battery-backed, or long-lifecycle industrial deployments.
Availability
CY62256NLL-55ZXA is available at Aetrix Electronics and suitable for industrial PLCs, medical instrumentation, automotive diagnostic tools, and legacy HMI systems requiring stable component supply across extended product lifecycles.
Supply support for CY62256NLL-55ZXA 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 acquired from Cypress Semiconductor.
CY62256NLL-55ZXA belongs to Infineon's legacy parallel SRAM portfolio, designed specifically for industrial and automotive applications requiring reliable, pin-compatible replacements for aging 5 V memory components.
FAQ
Is CY62256NLL-55ZXA RoHS-compliant and lead-free?
Yes. The "ZXA" suffix denotes a RoHS-compliant, lead-free 28-pin narrow SOIC package. It meets EU Directive 2011/65/EU and has been verified per JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3) for standard reflow processes.
Does CY62256NLL-55ZXA support battery backup operation?
Yes. It guarantees data retention down to VCC = 2.0 V with ICCDR ≤ 10 µA at +85 °C, enabling seamless transition to backup power sources such as lithium coin cells or supercapacitors during main supply interruption.
Can CY62256NLL-55ZXA replace older CY62256N-55SN parts?
Yes. Both share identical pinout, timing, and electrical specifications. The CY62256NLL-55ZXA is a direct, drop-in replacement with enhanced industrial temperature qualification and updated RoHS compliance-no design or firmware changes needed.
What is the maximum clock frequency supported for read/write cycles?
The device is asynchronous and does not use a clock. Its 55 ns read cycle time (tRC) supports effective data throughput up to ~18.2 MHz in burst-read scenarios, limited only by address setup/hold and control signal timing margins defined in the datasheet.
CY62256NLL-55ZXA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- MOBL™
- Package/Case:
- 28-TSSOP (0.465", 11.80mm Width)
- Packaging:
- Tray
- 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-55ZXA FAQ
1.How can I place an order for CY62256NLL-55ZXA through Aetrix?
Please submit a Request for Quotation (RFQ) for CY62256NLL-55ZXA 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-55ZXA reliable?
The price and inventory of CY62256NLL-55ZXA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY62256NLL-55ZXA is usually 5 days.
3.What payment methods are accepted for CY62256NLL-55ZXA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY62256NLL-55ZXA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY62256NLL-55ZXA?
CY62256NLL-55ZXA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY62256NLL-55ZXA 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-55ZXA?
For technical support, including CY62256NLL-55ZXA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY62256NLL-55ZXA requirements.
6.How does Aetrix verify that CY62256NLL-55ZXA is sourced from the original manufacturer or authorized distributors?
All CY62256NLL-55ZXA 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-55ZXA meets industry standards.
7.What is the process for return or replacement of CY62256NLL-55ZXA?
All CY62256NLL-55ZXA units undergo pre-shipment inspection (PSI). If there is an issue with CY62256NLL-55ZXA, 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-55ZXA part is unused and in its original packaging.
Return procedure for CY62256NLL-55ZXA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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