My Inquiry
My Account
Infineon Technologies CY62256NLL-55SNXE
- Part No.:
- CY62256NLL-55SNXE
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY62256NLL-55SNXE.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,193
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY62256NLL-55SNXE from Infineon Technologies (formerly Cypress Semiconductor) is a 256-Kbit (32 K × 8) CMOS static RAM with 55 ns access time, 4.5 V to 5.5 V operation, and LL-series low-power standby mode (82.5 µW max). It features active-low CE/OE/WE controls, TTL-compatible I/O, and automatic power-down when deselected-used in industrial control panels requiring non-volatile data buffering during microcontroller sleep cycles.
For engineers reviewing the CY62256NLL-55SNXE datasheet, CY62256NLL-55SNXE pinout, CY62256NLL-55SNXE application, or CY62256NLL-55SNXE equivalent, key selection criteria include 55 ns read cycle time, 32K × 8 organization, 28-pin narrow SOIC package, industrial temperature range (–40 °C to +85 °C), and CE-controlled auto power-down behavior.
Technical Context
The CY62256NLL-55SNXE implements a fully static 32K × 8 memory array with tristate bidirectional I/O lines (I/O0–I/O7), 15 address inputs (A0–A14), and three control signals: CE (chip enable), OE (output enable), and WE (write enable). Its architecture supports asynchronous read/write operations without clocks or refresh circuitry.
Power management is handled via dual-mode standby: ISB1 (0.3–0.5 mA) under TTL input conditions and ISB2 (0.1–10 µA) under CMOS input conditions. Data retention is guaranteed down to 2.0 V with ICCDR ≤ 10 µA at –40 °C to +85 °C, enabling battery-backed hold functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256 Kbit (32 K × 8) - supports byte-wide data bus interfacing with 8-bit microcontrollers |
| Access Time | 55 ns - enables direct interface with legacy 8/16-bit MCUs running at ≤18 MHz system clock |
| Voltage Range | 4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS logic rails and legacy industrial power supplies |
| Standby Current | 82.5 µW max (ISB2) - allows >1-year battery backup using CR2032 in always-on monitoring nodes |
| Operating Temp | –40 °C to +85 °C - qualified for industrial automation, PLC I/O modules, and motor drive controllers |
| Package | 28-pin narrow SOIC (300-mil) - surface-mount compatible with automated PCB assembly and thermal relief design |
| Input Compatibility | TTL/CMOS - eliminates level-shifting requirements when interfacing with mixed-logic systems |
Pinout & Package
Package: 28-pin narrow SOIC (300-mil), body width 7.5 mm, lead pitch 0.050 inch (1.27 mm), RoHS-compliant Pb-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus accepting 0x0000–0x7FFF; enables full 32K-word addressing without external decoding |
| I/O0–I/O7 | Bidirectional Data Line | Tristate-capable byte-wide data path; direction controlled by OE/WE states per cycle |
| CE | Chip Enable | Active-low global select; initiates auto power-down when HIGH, reducing ICC to ≤10 µA |
| OE | Output Enable | Active-low output gate; places I/O pins in high-Z state when deasserted, enabling bus sharing |
| WE | Write Enable | Active-low write strobe; latches data on rising edge when CE is LOW, defining write cycle boundary |
| VCC | Power Supply | +5 V nominal supply; decoupling capacitor required within 10 mm of pin 28 per layout guidelines |
| GND | Ground Reference | Signal and power return plane connection; must be tied to system ground with low-inductance path |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Power-Down | Reduces standby current to ≤10 µA when CE is HIGH, eliminating need for external power gating |
| Asynchronous Operation | No clock or refresh required - simplifies timing design in MCU-based systems with variable bus latency |
| Byte-Wide Interface | 32K × 8 organization matches native data width of 8-bit microcontrollers (e.g., PIC18F, 8051 derivatives) |
| Industrial Temperature Rating | Validated operation from –40 °C to +85 °C - supports deployment in uncontrolled cabinet environments |
| Pb-Free Packaging | Meets RoHS Directive 2011/65/EU - compliant for new industrial equipment designs requiring environmental certification |
Applications
| Programmable Logic Controller (PLC) I/O Buffer | Industrial HMI Local Cache |
|---|---|
Use Scenario: Stores real-time sensor status and actuator command history in modular PLC backplanes where main CPU operates intermittently. IC Role / Device Role / Timing Role: Asynchronous SRAM buffer holding 32 KB of volatile process data between scan cycles; accessed via parallel bus at 55 ns latency. Use Value: Eliminates wait states during CPU wake-up, ensuring deterministic response to fieldbus interrupts within 100 µs. | Use Scenario: Caches display bitmap segments and button state history in panel-mounted HMIs with ARM7-based controllers and limited internal RAM. IC Role / Device Role / Timing Role: External byte-accessible memory mapped into controller's peripheral address space; supports burst reads for screen refresh. Use Value: Enables 640×480 monochrome GUI rendering without frame buffer compression or external DRAM controller overhead. |
| Motor Drive Fault Log Storage | Legacy CNC Machine Memory Expansion |
Use Scenario: Captures timestamped overcurrent, thermal, and encoder error events during servo motor operation in closed-loop drives. IC Role / Device Role / Timing Role: Non-refreshing data logger with CE-gated power-down between fault captures; retains last 2000 events across power cycles via backup battery. Use Value: Provides deterministic 2.0 V data retention for ≥10 years at +85 °C, meeting IEC 61800-5-1 diagnostic logging requirements. | Use Scenario: Upgrades memory capacity in 1990s-era CNC motion controllers originally designed with 62256-pin-compatible sockets. IC Role / Device Role / Timing Role: Pin- and timing-compatible drop-in replacement for obsolete 28-pin DIP SRAMs; maintains identical tRC/tAA/tWC timing margins. Use Value: Extends service life of production-floor CNC machines without firmware or PCB redesign, preserving OEM calibration data integrity. |
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 | Same 32K × 8 organization, 55 ns access, but 2.7–3.6 V only; no 5 V support | Requires voltage translation in 5 V systems; unsuitable for direct replacement in legacy industrial hardware | Select only if migrating to 3.3 V platform with redesigned power delivery |
| IS62WV2568BLL-55NLI | 55 ns, 32K × 8, 2.7–3.6 V; lower standby current (3 µA), but incompatible VCC range | Cannot operate at 5 V; lacks automotive-grade temp rating; requires board-level level shifters | Use only in new 3.3 V designs prioritizing ultra-low ISB over backward compatibility |
Compared with AS6C4008-55TIN and IS62WV2568BLL-55NLI, CY62256NLL-55SNXE uniquely supports 4.5–5.5 V operation and industrial temperature range without external components-making it the sole viable option for retrofitting legacy 5 V systems.
Availability
CY62256NLL-55SNXE is available at Aetrix Electronics and suitable for industrial automation, motor drive control, and legacy CNC machine upgrades requiring stable component supply and long-term lifecycle assurance.
Supply support for CY62256NLL-55SNXE 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 German semiconductor manufacturer specializing in power management, automotive ICs, and memory solutions, with global R&D and manufacturing infrastructure.
CY62256N belongs to Infineon's legacy Cypress SRAM product line, engineered for reliability-critical industrial and automotive applications requiring zero-refresh, deterministic timing, and extended temperature operation.
FAQ
What is the maximum clock frequency supported by CY62256NLL-55SNXE?
CY62256NLL-55SNXE is an asynchronous static RAM with no internal clock. Its 55 ns access time supports reliable interfacing with microcontrollers operating up to 18 MHz bus frequency, assuming proper setup/hold timing compliance per datasheet switching characteristics.
Does CY62256NLL-55SNXE require a refresh circuit?
No. As a CMOS static RAM, CY62256NLL-55SNXE retains data indefinitely while powered, with no refresh circuitry or periodic access required-unlike DRAM. Data retention persists down to 2.0 V VCC during brownout conditions.
Can CY62256NLL-55SNXE be used in automotive applications?
Yes. The "Automotive-A" qualification (-40 °C to +85 °C) and AEC-Q100 stress testing make it suitable for engine control modules, body electronics, and ADAS subsystems where 5 V rail stability and deterministic timing are critical.
What is the difference between CY62256NLL-55SNXE and CY62256NLL-70SNXE?
CY62256NLL-55SNXE guarantees 55 ns access time; CY62256NLL-70SNXE guarantees 70 ns. Both share identical pinout, voltage range, and temperature rating, but the -55 version enables tighter timing margins in high-speed 8-bit bus systems.
CY62256NLL-55SNXE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- MOBL™
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOIC
CY62256NLL-55SNXE FAQ
1.How can I place an order for CY62256NLL-55SNXE through Aetrix?
Please submit a Request for Quotation (RFQ) for CY62256NLL-55SNXE 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-55SNXE reliable?
The price and inventory of CY62256NLL-55SNXE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY62256NLL-55SNXE is usually 5 days.
3.What payment methods are accepted for CY62256NLL-55SNXE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY62256NLL-55SNXE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY62256NLL-55SNXE?
CY62256NLL-55SNXE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY62256NLL-55SNXE 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-55SNXE?
For technical support, including CY62256NLL-55SNXE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY62256NLL-55SNXE requirements.
6.How does Aetrix verify that CY62256NLL-55SNXE is sourced from the original manufacturer or authorized distributors?
All CY62256NLL-55SNXE 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-55SNXE meets industry standards.
7.What is the process for return or replacement of CY62256NLL-55SNXE?
All CY62256NLL-55SNXE units undergo pre-shipment inspection (PSI). If there is an issue with CY62256NLL-55SNXE, 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-55SNXE part is unused and in its original packaging.
Return procedure for CY62256NLL-55SNXE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY62256NLL-55SNXE Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
