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Infineon Technologies CY62256L-70SNXI
- Part No.:
- CY62256L-70SNXI
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY62256L-70SNXI.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,812
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Product details
Overview
CY62256L-70SNXI from Cypress Semiconductor is a 256 Kbit (32K × 8) CMOS static RAM with 70 ns access time, 4.5–5.5 V operation, industrial temperature range (–40°C to +85°C), and low standby power (28 µW max). It serves as non-volatile cache or buffer memory in legacy industrial controllers, PLC I/O modules, and embedded instrumentation where deterministic timing and TTL-compatible interfacing are required.
For engineers reviewing the CY62256L-70SNXI datasheet, CY62256L-70SNXI pinout, CY62256L-70SNXI application, or CY62256L-70SNXI equivalent, key selection criteria include guaranteed 70 ns read cycle time under industrial temperature, automatic CE-controlled power-down, and compatibility with 28-pin narrow SOIC footprint for board-level replacement of legacy SRAMs.
Technical Context
The CY62256L-70SNXI implements a full CMOS 32K × 8 asynchronous SRAM architecture with three-state bidirectional I/Os, active-low chip enable (CE), output enable (OE), and write enable (WE) controls. Its internal array is organized as a 512 × 512 memory cell matrix with separate row/column decoders and sense amplifiers.
It supports true dual-cycle operation: read cycles require CE and OE low with WE high; write cycles require CE and WE low while OE may be high or low. Power-down is fully automatic upon CE high, reducing ICC to ≤28 µW without external control logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256 Kbit (32,768 × 8 bits) - supports byte-wide data bus interfaces without external demultiplexing |
| Access Time | 70 ns max - guarantees deterministic read latency for 14.3 MHz bus clock systems |
| Voltage Range | 4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS logic rails and tolerant of ±10% supply variation |
| Standby Current | 28 µW max at VCC = 5.5 V - enables ultra-low-power sleep mode in battery-backed systems |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including factory automation and motor drives |
| Package | 28-pin narrow SOIC (450-mil width) - surface-mount compatible with legacy PCB footprints and reflow profiles |
| Input/Output | TTL-compatible I/O levels - eliminates level-shifting requirements when interfacing with 5 V microcontrollers |
Pinout & Package
Package: 28-pin narrow SOIC (450-mil body width, 300-mil package width), RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus accepting 0–32767 to select one of 32K memory locations |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit shared input/output lines; high-impedance when CE or OE is inactive |
| CE | Chip Enable (active LOW) | Primary device selection signal; triggers automatic power-down when HIGH |
| OE | Output Enable (active LOW) | Controls I/O direction: LOW enables output drivers, HIGH places I/Os in high-Z state |
| WE | Write Enable (active LOW) | Controls R/W mode: LOW enables write, HIGH enables read (with CE and OE asserted) |
| VCC | Power Supply | +4.5 V to +5.5 V supply pin; decoupling capacitor required within 10 mm |
| GND | Ground Reference | Signal and power ground reference; must be connected to low-impedance PCB plane |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE Power-Down | Reduces ICC to ≤28 µW without external circuitry-critical for battery-backed memory retention |
| Three-State Output Drivers | Enables direct connection to shared data buses without external bus transceivers |
| TTL-Compatible I/O | Eliminates need for level shifters when interfacing with legacy 5 V microcontrollers and FPGAs |
| Industrial Temperature Rating | Validated operation from –40°C to +85°C-supports deployment in uncontrolled industrial enclosures |
| Multiple Package Options | Narrow SOIC footprint matches legacy designs; also available in TSOP and PDIP for prototyping or repair |
Applications
| Industrial PLC I/O Modules | Legacy Medical Instrumentation |
|---|---|
Use Scenario: Buffering sensor acquisition data in real-time I/O expansion cards for programmable logic controllers. IC Role / Device Role / Timing Role: Asynchronous byte-wide SRAM providing zero-wait-state storage for analog-to-digital conversion results before CPU polling. Use Value: 70 ns access time ensures data capture aligns with 10–20 kHz sampling clocks without pipeline stalls. |
Use Scenario: Storing calibration coefficients and real-time waveform buffers in portable ECG and EEG devices. IC Role / Device Role / Timing Role: Non-volatile backup memory holding critical settings during power cycling, enabled by low 28 µW standby draw. Use Value: Automatic CE power-down extends battery life beyond 72 hours in standby without firmware intervention. |
| Automotive Diagnostic Tools | Avionics Test Equipment |
Use Scenario: Temporary storage of OBD-II protocol logs and fault code history in handheld vehicle scanners. IC Role / Device Role / Timing Role: Standalone SRAM interfaced directly to 8-bit microcontroller data bus for burst-mode logging. Use Value: TTL-compatible I/O and 5 V tolerance simplify interface design and reduce BOM count versus level-shifted alternatives. |
Use Scenario: Capturing transient signal traces during flight-control system validation tests. IC Role / Device Role / Timing Role: High-reliability buffer memory synchronized to FPGA-based acquisition logic using CE/OE handshaking. Use Value: Industrial-grade thermal performance ensures stable 70 ns timing across –40°C to +85°C ambient swings in ground-test racks. |
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, same 32K × 8 organization, but uses 28-pin SOJ package and has higher ISB (100 µW) | SOJ footprint incompatible with CY62256L-70SNXI's narrow SOIC; requires PCB redesign | Select only if SOJ mounting is already standardized in existing assembly process |
| AS6C4008-70TIN | 70 ns access, 512K × 8 density (larger), 2.7–5.5 V supply, but no industrial temp grade (0°C to +70°C only) | Lacks –40°C qualification-unsuitable for cold-environment industrial deployments | Consider only for commercial-temperature upgrades where higher density is needed and thermal margin exists |
Compared with IS62C256AL-70QLI and AS6C4008-70TIN, the CY62256L-70SNXI uniquely delivers industrial temperature rating, narrow SOIC compatibility, and sub-30 µW standby power in a single package-making it the only drop-in replacement for legacy 5 V SRAM designs requiring field reliability.
Availability
CY62256L-70SNXI is available at Aetrix Electronics and suitable for industrial PLC I/O modules, legacy medical instrumentation, and automotive diagnostic tools requiring stable component supply and long-term lifecycle support.
Supply support for CY62256L-70SNXI 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 embedded markets.
The CY62256 family was designed specifically for pin- and function-compatible replacement of aging 28-pin 5 V SRAMs in industrial control and instrumentation systems-emphasizing reliability, low power, and backward compatibility over new feature integration.
FAQ
Is CY62256L-70SNXI compatible with 5 V TTL logic families?
Yes. All inputs accept VIH ≥ 2.2 V and VIL ≤ 0.8 V; outputs drive VOH ≥ 2.4 V at –1 mA and VOL ≤ 0.4 V at 2.1 mA-fully compliant with standard 5 V TTL voltage thresholds and fan-out requirements.
Does this SRAM retain data during power loss?
No. CY62256L-70SNXI is volatile memory and requires continuous VCC to retain data. For data retention during power loss, an external battery-backed power supply or supercapacitor circuit must be implemented on the VCC rail.
What is the maximum clock frequency supported for read/write cycles?
The device does not use a clock. It is asynchronous: maximum sustained bus throughput is determined by tRC = 70 ns, enabling up to ~14.3 million read/write operations per second in ideal conditions with no bus turnaround delays.
Can CY62256L-70SNXI be used in place of CY62256-70SNXI?
Yes, with identical pinout and AC/DC specifications. The "L" suffix denotes the industrial temperature grade (–40°C to +85°C); the base CY62256-70SNXI is commercial grade (0°C to +70°C) and shares all electrical parameters except thermal qualification.
CY62256L-70SNXI 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:
- 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
CY62256L-70SNXI FAQ
1.How can I place an order for CY62256L-70SNXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY62256L-70SNXI 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 CY62256L-70SNXI reliable?
The price and inventory of CY62256L-70SNXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY62256L-70SNXI is usually 5 days.
3.What payment methods are accepted for CY62256L-70SNXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY62256L-70SNXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY62256L-70SNXI?
CY62256L-70SNXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY62256L-70SNXI 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 CY62256L-70SNXI?
For technical support, including CY62256L-70SNXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY62256L-70SNXI requirements.
6.How does Aetrix verify that CY62256L-70SNXI is sourced from the original manufacturer or authorized distributors?
All CY62256L-70SNXI 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 CY62256L-70SNXI meets industry standards.
7.What is the process for return or replacement of CY62256L-70SNXI?
All CY62256L-70SNXI units undergo pre-shipment inspection (PSI). If there is an issue with CY62256L-70SNXI, 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 CY62256L-70SNXI part is unused and in its original packaging.
Return procedure for CY62256L-70SNXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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