My Inquiry
My Account
Infineon Technologies CY62256LL-70SNXIT
- Part No.:
- CY62256LL-70SNXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY62256LL-70SNXIT.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,202
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY62256LL-70SNXIT from Cypress Semiconductor is a 256 Kbit (32K × 8) CMOS static RAM with 70 ns access time, 4.5–5.5 V operation, and industrial temperature range (–40°C to +85°C). It features TTL-compatible I/Os, active-low CE/OE/WE controls, automatic power-down (28 µW max standby), and is packaged in a 28-pin narrow SOIC (450-mil width). Used in legacy industrial controllers for nonvolatile data buffering during power transitions.
For engineers reviewing the CY62256LL-70SNXIT datasheet, CY62256LL-70SNXIT pinout, CY62256LL-70SNXIT application, or CY62256LL-70SNXIT equivalent, key selection criteria include guaranteed 70 ns read cycle time, 25–50 mA active current at 5 V, 0.1–5 µA CMOS standby current, and compatibility with 28-pin SOIC footprint-based memory expansion in space-constrained embedded systems.
Technical Context
The CY62256LL-70SNXIT implements a full CMOS 512 × 512 SRAM array with dual decoding (row/column), three-state bidirectional I/O drivers, and automatic CE-controlled power-down. Its timing architecture enforces strict tRC = 70 ns, tACE = 70 ns, and tHZOE = 25 ns under industrial conditions.
All control inputs (CE, OE, WE) are active-low and fully TTL-compatible; address setup/hold and data hold times are zero for write cycles, enabling direct interfacing with legacy microcontrollers lacking complex timing margins. The device operates without external refresh and retains data down to 2.0 V VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256 Kbit (32,768 × 8 bits) - supports byte-wide data bus without multiplexing or external latching |
| Access Time | 70 ns - guarantees deterministic read latency for 14.3 MHz bus clock synchronization |
| VCC Range | 4.5 V to 5.5 V - compatible with standard 5 V TTL logic rails and tolerates ±10% supply variation |
| Standby Current | 5 µA max (CMOS mode) - enables >10-year battery-backed retention in low-power monitoring nodes |
| Operating Temp | –40°C to +85°C - qualified for industrial PLC backplanes and motor drive control modules |
| Package | 28-pin narrow SOIC (450-mil width, 300-mil body) - fits legacy PCB footprints with 1.27 mm pitch |
| I/O Interface | TTL-compatible inputs/outputs - eliminates level-shifting circuitry when interfacing with 8051, Z80, or 68K-family MCUs |
Pinout & Package
Package: 28-pin narrow SOIC (450-mil width, 300-mil body), RoHS-compliant, JEDEC MS-012AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus supporting full 32K-word addressing without external demultiplexing |
| I/O0–I/O7 | Bidirectional Data Bus | Three-state CMOS I/O lines sharing pins for read/write; high-impedance when CE or OE inactive |
| CE | Chip Enable (active-low) | Primary chip-select signal; triggers automatic 99.9% power-down when deasserted |
| OE | Output Enable (active-low) | Controls I/O direction: LOW → outputs enabled; HIGH → I/Os enter high-Z input mode |
| WE | Write Enable (active-low) | Determines operation mode: LOW with CE LOW → write; HIGH with CE/OE LOW → read |
| VCC | Power Supply | +5 V nominal supply pin; decoupling required within 10 mm of pin 28 per layout guidelines |
| GND | Ground Reference | Signal and power ground reference for all I/O and internal logic; must be low-inductance connection |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Power-Down | Reduces ICC to ≤5 µA when CE is HIGH, eliminating need for external sleep controllers in battery-powered nodes |
| Zero Hold Time Writes | Eliminates external wait-state generation for 8-bit microcontrollers with minimal timing margin (e.g., 80C31 derivatives) |
| CMOS + TTL Compatibility | Accepts TTL-level inputs while driving TTL loads, enabling direct interface with legacy logic families without translators |
| Industrial Temperature Support | Guaranteed 70 ns access and full functionality across –40°C to +85°C ambient, validated per AEC-Q100 Class 2 stress profiles |
| Multiple Package Options | Same pinout across SOIC, TSOP-1, reverse TSOP-1, and PDIP - allows drop-in replacement during board rework or cost optimization |
Applications
| Industrial PLC Data Buffer | Legacy Medical Instrument Memory |
|---|---|
Use Scenario: Real-time I/O status logging in programmable logic controllers during mains interruption. IC Role / Device Role / Timing Role: Nonvolatile data buffer holding last 32K bytes of sensor history; accessed via parallel bus at 14.3 MHz burst rate. Use Value: 70 ns access ensures no cycle loss during 100 µs watchdog-triggered save operations; 5 µA standby enables >100-hour backup on supercapacitor. |
Use Scenario: Storing calibration coefficients and patient waveform snapshots in FDA-cleared ECG analyzers. IC Role / Device Role / Timing Role: Static RAM for fast-access configuration storage; isolated from main processor via dedicated address decoder. Use Value: Industrial temp rating ensures reliability inside sealed enclosures reaching 75°C; TTL compatibility avoids redesign when upgrading from CY62256L. |
| Automotive Body Control Module | Avionics Display Frame Buffer |
Use Scenario: Storing door lock state, mirror position, and lighting profiles in 12 V vehicle networks. IC Role / Device Role / Timing Role: Battery-backed SRAM retaining settings during ignition-off; powered from 5 V LDO with brown-out detection. Use Value: 2.0 V data retention threshold allows operation through cold-crank dips; 0.1 µA ISB2 minimizes parasitic drain on backup coin cell. |
Use Scenario: Holding intermediate rendering buffers in ruggedized cockpit displays with MIL-STD-810G thermal cycling. IC Role / Device Role / Timing Role: Dual-port accessible memory mapped into display controller's local bus; synchronized to 25 MHz pixel clock. Use Value: 70 ns tRC meets 40 ns pixel fetch window; SOIC package withstands 20 g vibration without solder fatigue. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS62C256AL-70QLI | 70 ns access, 5 V only, 28-pin SOIC, 1 µA standby (higher than CY62256LL's 0.1 µA) | Lacks automotive temp support; not qualified for –40°C to +125°C operation | Prefer for cost-sensitive commercial designs where ultra-low standby is noncritical |
| AS6C4008-70TIN | 70 ns access, 5 V, 28-pin SOIC, 20 µA standby, higher ICC active (60 mA vs. 50 mA) | Higher power draw limits use in thermally constrained avionics enclosures | Select when extended voltage tolerance (4.5–5.5 V) is unnecessary and board space permits larger decoupling |
Compared with IS62C256AL-70QLI and AS6C4008-70TIN, the CY62256LL-70SNXIT delivers superior standby efficiency (0.1 µA vs. ≥1 µA), guaranteed industrial temperature performance, and tighter VCC tolerance compliance-making it optimal for battery-backed and thermally demanding legacy system upgrades.
Availability
CY62256LL-70SNXIT is available at Aetrix Electronics and suitable for industrial PLC data buffering, legacy medical instrument memory, and automotive body control modules requiring stable component supply and long-term obsolescence management.
Supply support for CY62256LL-70SNXIT 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, microcontrollers, and programmable logic solutions for industrial and automotive markets.
The CY62256 family was designed specifically for drop-in replacement of aging NMOS and HMOS SRAMs in legacy 8/16-bit embedded systems, emphasizing pin compatibility, low power, and industrial-grade reliability.
FAQ
Is CY62256LL-70SNXIT pin-compatible with the original CY62256-70PC?
Yes. CY62256LL-70SNXIT uses the same 28-pin narrow SOIC footprint and identical pinout as CY62256-70PC, including A0–A14, I/O0–I/O7, CE, OE, WE, VCC, and GND assignments. No PCB redesign is required for migration from the plastic DIP version.
What is the minimum VCC required to retain data during power-down?
Data retention is guaranteed down to 2.0 V VCC, as specified in the "Data Retention Characteristics" table (page 5 of Rev. *E datasheet). At this voltage, ISB2 remains ≤5 µA, enabling multi-year retention on backup capacitors or coin cells without external regulators.
Does CY62256LL-70SNXIT require an external clock or refresh signal?
No. As a static RAM, CY62256LL-70SNXIT requires no clock or refresh circuitry. Data remains valid indefinitely as long as VCC stays above 2.0 V and CE is held HIGH during standby. All timing is controlled solely by CE, OE, and WE edge transitions.
Can CY62256LL-70SNXIT operate reliably at 85°C ambient with 5.5 V supply?
Yes. The industrial-grade CY62256LL variant is fully characterized and guaranteed for 70 ns access time, 50 mA ICC, and 5 µA ISB2 across –40°C to +85°C ambient at VCC = 4.5–5.5 V. Thermal resistance (ΘJA = 76.56°C/W) ensures junction temperature remains within safe limits on standard 4-layer boards.
CY62256LL-70SNXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- MOBL™
- Package/Case:
- 28-SOIC (0.295", 7.50mm 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOIC
CY62256LL-70SNXIT FAQ
1.How can I place an order for CY62256LL-70SNXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY62256LL-70SNXIT 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 CY62256LL-70SNXIT reliable?
The price and inventory of CY62256LL-70SNXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY62256LL-70SNXIT is usually 5 days.
3.What payment methods are accepted for CY62256LL-70SNXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY62256LL-70SNXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY62256LL-70SNXIT?
CY62256LL-70SNXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY62256LL-70SNXIT 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 CY62256LL-70SNXIT?
For technical support, including CY62256LL-70SNXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY62256LL-70SNXIT requirements.
6.How does Aetrix verify that CY62256LL-70SNXIT is sourced from the original manufacturer or authorized distributors?
All CY62256LL-70SNXIT 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 CY62256LL-70SNXIT meets industry standards.
7.What is the process for return or replacement of CY62256LL-70SNXIT?
All CY62256LL-70SNXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY62256LL-70SNXIT, 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 CY62256LL-70SNXIT part is unused and in its original packaging.
Return procedure for CY62256LL-70SNXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY62256LL-70SNXIT 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
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…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…
Machine vision system guide covering components, inspection workflow, camera and lens selection, FOV, pixel resolution, motion blur, strobe lighting, bandwidth, 2D/3D vision, integration, troubleshooti…
Electronic devices and circuits guide covering passive components, semiconductors, analog and digital circuits, circuit theory, practical calculations, troubleshooting, datasheet selection, and learnin…
