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Infineon Technologies CY62256NLL-70SNXCT
- Part No.:
- CY62256NLL-70SNXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY62256NLL-70SNXCT.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,092
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Product details
Overview
CY62256NLL-70SNXCT from Infineon Technologies (formerly Cypress) is a 256-Kbit (32 K × 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/O, automatic CE-controlled power-down, and tristate outputs for memory expansion in embedded controllers and instrumentation systems.
For engineers reviewing the CY62256NLL-70SNXCT datasheet, CY62256NLL-70SNXCT pinout, CY62256NLL-70SNXCT application, or CY62256NLL-70SNXCT equivalent, key selection criteria include standby current (≤10 µA), active power (≤275 mW), 28-pin SOIC package compatibility, and CE/OE/WE control logic for multi-chip memory mapping.
Technical Context
The CY62256NLL-70SNXCT implements a full CMOS 32K × 8 SRAM array with separate address decoding (A0–A14), bidirectional data I/O0–I/O7, and three independent control inputs: CE (chip enable), OE (output enable), and WE (write enable). Its architecture supports asynchronous read/write cycles without clocks or refresh circuitry.
Power management is handled via automatic CE-driven power-down mode, reducing ICC to ≤10 µA (ISB2) when CE is HIGH and inputs are at valid logic levels. The device maintains data retention down to 2.0 V VCC and exhibits 5 ns output enable/disable timing (tLZOE/tHZOE) under 5 pF load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 256 Kbit (32 K × 8) - supports byte-wide addressing without external data multiplexing |
| Access time | 70 ns - defines maximum clock rate for synchronous interface designs using this SRAM |
| VCC range | 4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS logic rails and legacy industrial power supplies |
| Standby current (ISB2) | ≤10 µA at –40 °C to +85 °C - enables low-power sleep modes in battery-backed systems |
| Operating current (ICC) | ≤50 mA max - determines thermal budget and regulator sizing for continuous read/write operation |
| Data retention voltage | 2.0 V minimum - allows data hold during brown-out or backup-battery switchover |
| Input capacitance | 6 pF - limits trace length and fan-out in high-speed address/data bus layouts |
Pinout & Package
Package: 28-pin narrow SOIC (300-mil), RoHS-compliant, surface-mountable with standard reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address input | 15-bit address bus supporting full 32K-word decode; no external address latching required |
| I/O0–I/O7 | Bidirectional data I/O | Tristate-enabled byte-wide data path; direction controlled by OE and WE states |
| CE | Chip enable (active LOW) | Primary chip-select signal; asserts power-down mode when HIGH and disables outputs |
| OE | Output enable (active LOW) | Controls I/O pin direction: LOW = output (read), HIGH = input/tristate (write or idle) |
| WE | Write enable (active LOW) | Controls memory operation: LOW = write, HIGH = read; overlaps with CE for write initiation |
| VCC | Power supply | +5 V nominal supply; decoupling capacitor required within 10 mm of pin 28 |
| GND | Ground reference | Common return for all signals and power; must be connected to low-impedance system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE power-down | Reduces ICC to ≤10 µA without external control logic or sleep-state sequencing |
| TTL-compatible I/O | Eliminates level-shifting requirements when interfacing with legacy 5 V microcontrollers and FPGAs |
| Tristate output drivers | Enables direct connection to shared data buses without external bus transceivers |
| Multiple temperature grades | Industrial-grade variant (–40 °C to +85 °C) ensures reliability in factory automation and motor control enclosures |
| Pb-free packaging | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 3 |
Applications
| Industrial PLC Data Buffer | Medical Instrumentation Memory |
|---|---|
Use Scenario: Real-time data logging in programmable logic controllers with cyclic scan times under 10 ms. IC Role / Device Role / Timing Role: Byte-accessible scratchpad memory for temporary register storage and I/O image buffering. Use Value: 70 ns access time meets deterministic response deadlines; 10 µA ISB2 enables energy-efficient idle periods between scans. |
Use Scenario: ECG waveform capture and preprocessing in portable diagnostic devices with battery backup. IC Role / Device Role / Timing Role: Non-refresh volatile buffer holding digitized analog samples prior to DSP processing or transmission. Use Value: 2.0 V data retention supports seamless transition to backup power during AC loss; 28-pin SOIC fits compact PCB footprints. |
| Automotive Body Control Module | Test Equipment Firmware Cache |
Use Scenario: Storing configuration parameters and fault codes in body control units operating across –40 °C to +85 °C ambient. IC Role / Device Role / Timing Role: EEPROM-replacement SRAM with external nonvolatile backup, accessed via CAN-linked microcontroller. Use Value: Industrial temperature rating ensures operation in under-hood environments; CE-controlled power-down minimizes quiescent draw. |
Use Scenario: Caching calibration tables and test sequence instructions in automated benchtop test systems. IC Role / Device Role / Timing Role: High-speed local memory for FPGA-based pattern generators requiring sub-100 ns read latency. Use Value: 6 pF input capacitance preserves signal integrity on 50 MHz address buses; tristate I/O simplifies multiplexer-less board-level sharing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISSI IS62C256AL-70QLI | Same 32K × 8 organization, 70 ns speed, but 2.7–5.5 V VCC range and higher ISB2 (25 µA) | Broader voltage support suits mixed-supply systems; higher standby current limits battery life | Select if dual-voltage operation (3.3 V/5 V) is required and 15 µA extra ISB2 is acceptable |
| ON Semiconductor MC68HC11E9CP | Not a drop-in replacement: integrated MCU with on-chip 512-byte RAM; no external 256K SRAM interface | Replaces discrete SRAM + controller with single-chip solution; requires firmware rewrite | Choose only for new designs targeting consolidation - not for SRAM-only upgrades or pin-compatible replacements |
Compared with IS62C256AL-70QLI, CY62256NLL-70SNXCT offers lower standby power and tighter industrial temp validation; versus MC68HC11E9CP, it provides pure memory functionality with zero software dependency and guaranteed timing predictability.
Availability
CY62256NLL-70SNXCT is available at Aetrix Electronics and suitable for industrial PLC data buffers, medical instrumentation memory, automotive body control modules, and test equipment firmware cache requiring stable component supply and long-term lifecycle assurance.
Supply support for CY62256NLL-70SNXCT 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-70SNXCT belongs to Infineon's legacy Cypress SRAM product line, engineered for deterministic, low-latency, nonvolatile-backup-capable memory in harsh-environment embedded systems.
FAQ
Is CY62256NLL-70SNXCT pin-compatible with CY62256NLL-55?
Yes - both share identical 28-pin SOIC pinout, address/data/control signal mapping, and electrical interface. The only difference is access time: 55 ns vs. 70 ns. Systems designed for the slower variant will operate reliably with the 55 ns part, but timing-critical designs may require verification of setup/hold margins.
Does CY62256NLL-70SNXCT require an external clock or refresh circuit?
No - it is a fully static CMOS SRAM with no clock input and zero refresh requirement. Data retention is maintained as long as VCC remains ≥2.0 V and CE is held HIGH during standby. All timing is governed solely by CE, OE, and WE signal transitions.
What is the maximum data bus fan-out supported by CY62256NLL-70SNXCT I/O pins?
The I/O pins drive ±2.1 mA (IOL/IOH) at TTL levels, supporting up to 10 standard TTL loads or 20 CMOS loads per pin. For reliable 70 ns operation with 100 pF total load, trace lengths should be limited to ≤5 cm on 50 Ω impedance-controlled routing.
Can CY62256NLL-70SNXCT be used in automotive AEC-Q100 qualified systems?
The CY62256NLL-70SNXCT is rated for Automotive-A grade (–40 °C to +85 °C), which aligns with AEC-Q100 Grade 3 stress testing requirements. However, it is not formally AEC-Q100 certified - qualification documentation must be obtained separately from Infineon for safety-critical automotive deployments.
CY62256NLL-70SNXCT 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOIC
CY62256NLL-70SNXCT FAQ
1.How can I place an order for CY62256NLL-70SNXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY62256NLL-70SNXCT 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-70SNXCT reliable?
The price and inventory of CY62256NLL-70SNXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY62256NLL-70SNXCT is usually 5 days.
3.What payment methods are accepted for CY62256NLL-70SNXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY62256NLL-70SNXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY62256NLL-70SNXCT?
CY62256NLL-70SNXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY62256NLL-70SNXCT 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-70SNXCT?
For technical support, including CY62256NLL-70SNXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY62256NLL-70SNXCT requirements.
6.How does Aetrix verify that CY62256NLL-70SNXCT is sourced from the original manufacturer or authorized distributors?
All CY62256NLL-70SNXCT 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-70SNXCT meets industry standards.
7.What is the process for return or replacement of CY62256NLL-70SNXCT?
All CY62256NLL-70SNXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY62256NLL-70SNXCT, 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-70SNXCT part is unused and in its original packaging.
Return procedure for CY62256NLL-70SNXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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