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Infineon Technologies CY62256VNLL-70ZXC
- Part No.:
- CY62256VNLL-70ZXC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
CY62256VNLL-70ZXC.pdf
- Description:
- IC SRAM 256KBIT PAR 28TSOP I
- Quantity:
- Payment:
- Shipping:
Inventory:1,309
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Product details
Overview
CY62256VNLL-70ZXC from Cypress Semiconductor is a 256-Kbit (32 K × 8) CMOS static RAM with 70 ns access time, 2.7 V to 3.6 V supply range, and industrial temperature rating (–40 °C to +85 °C), housed in a Pb-free 28-pin narrow SOIC package. It supports TTL-compatible I/O, automatic CE-controlled power-down (<5 µA standby), and tristate bidirectional data bus for embedded microcontroller memory expansion.
For engineers reviewing the CY62256VNLL-70ZXC datasheet, CY62256VNLL-70ZXC pinout, CY62256VNLL-70ZXC application, or CY62256VNLL-70ZXC equivalent, key selection criteria include guaranteed 70 ns read cycle timing, low-voltage operation down to 2.7 V, industrial-grade thermal performance, and compatibility with legacy 32K×8 SRAM-based address/data bus architectures.
Technical Context
The CY62256VNLL-70ZXC implements a fully static 32 K × 8 memory array with asynchronous parallel interface, using CMOS technology for optimal speed-power trade-off. Its dual active-Low control signals-CE (chip enable) and OE (output enable)-enable precise memory banking and output gating without external logic.
Write operations are controlled by WE (write enable) in conjunction with CE, while data retention is maintained at VCC ≥ 1.4 V with ICCDR ≤ 6 µA (industrial grade). The device features automatic power-down when CE is deasserted, reducing standby current to ≤5 µA under CMOS input conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 256 Kbit (32 K words × 8 bits); supports byte-wide data bus interfacing with 15-bit address space (A0–A14). |
| Access time | 70 ns max tAA and tACE; ensures compatibility with 14 MHz bus clocks in synchronous systems. |
| VCC range | 2.7 V to 3.6 V; enables direct interface with 3.3 V logic families and mixed-voltage system designs. |
| Standby current | ≤5 µA (ISB2, industrial temp); allows battery-backed operation in low-power hold modes. |
| Data retention voltage | ≥1.4 V (VDR); permits extended retention during brown-out or backup-supply scenarios. |
| Operating temperature | –40 °C to +85 °C; qualified for industrial control, instrumentation, and automotive body electronics. |
| Package | 28-pin narrow SOIC (300-mil); compatible with standard PCB assembly processes and legacy footprint layouts. |
Pinout & Package
Package: 28-pin narrow SOIC (300-mil), Pb-free, JEDEC MS-012AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address inputs | 15-bit unidirectional address bus; selects one of 32,768 memory locations. |
| I/O0–I/O7 | Bidirectional data bus | Tristate-capable 8-bit data path; functions as input during write, output during read, high-Z when deselected. |
| CE | Chip enable (active LOW) | Primary chip select; enables internal circuitry and determines power-down state (ISB2 = 5 µA when HIGH). |
| OE | Output enable (active LOW) | Controls I/O direction: LOW → outputs enabled; HIGH → I/O pins tristated (input mode or high-Z). |
| WE | Write enable (active LOW) | Controls memory operation mode: LOW with CE LOW → write; HIGH with CE LOW → read. |
| VCC | Power supply | 2.7 V–3.6 V core supply; powers all internal logic and array circuits. |
| GND | Ground reference | Signal and power return path; must be low-impedance for stable timing and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE power-down | Reduces ICC to ≤5 µA (industrial) when CE is HIGH, eliminating need for external power-gating logic. |
| TTL-compatible I/O | VIH = 2.2 V min, VIL = 0.8 V max; interoperates directly with 5 V-tolerant or 3.3 V microcontrollers without level shifters. |
| Low-voltage operation | Functional down to 2.7 V VCC; supports single-supply 3.3 V systems and battery-powered retention modes. |
| 70 ns read/write timing | tRC = 70 ns, tWC = 70 ns; meets timing budgets for 14 MHz bus interfaces and legacy 8/16-bit MCU designs. |
| CMOS process architecture | Combines low static power (ICC = 11–30 mA active) with fast switching; eliminates refresh circuitry required in DRAM. |
Applications
| Industrial PLC Memory Buffer | Automotive Body Control Module |
|---|---|
|
Use Scenario: Storing real-time sensor calibration tables and I/O state history in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Byte-addressable non-refreshing memory buffer interfaced to ARM Cortex-M4 or Renesas RX65N via parallel bus. Use Value: 70 ns access time ensures deterministic response within 100 µs scan cycles; –40 °C to +85 °C rating guarantees reliability across ambient extremes. |
Use Scenario: Holding configuration data and fault logs in door module ECUs where space-constrained SOIC packaging is required. IC Role / Device Role / Timing Role: Standalone SRAM for EEPROM offload-reducing write wear and enabling faster parameter updates during CAN diagnostics. Use Value: ≤5 µA ISB2 enables >1-year battery backup life; 2.7 V minimum VCC supports degraded supply operation during cold-cranking events. |
| Medical Diagnostic Instrument Cache | Legacy Industrial HMI Controller |
|
Use Scenario: Caching waveform buffers and user interface assets in portable ultrasound devices requiring deterministic latency and low EMI. IC Role / Device Role / Timing Role: High-reliability parallel SRAM used as frame buffer extension for FPGA-based display controllers. Use Value: Tristate I/O and OE control eliminate bus contention during DMA transfers; Pb-free SOIC meets IEC 60601-1 RoHS compliance requirements. |
Use Scenario: Replacing obsolete 28-pin 27C256 EPROMs in retrofitted CNC machine controllers where firmware is loaded at boot. IC Role / Device Role / Timing Role: Drop-in SRAM replacement for ROM-based boot loaders-enabling field-upgradable firmware via serial interface. Use Value: Pin-compatible with legacy 28-pin DIP/SOIC footprints; 70 ns timing matches original EPROM access specs for zero-modification board reuse. |
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 uses 2.7–5.5 V VCC range and has higher ISB2 (10 µA industrial). | Broader voltage range suits mixed 5 V/3.3 V systems; higher standby current limits battery-backed use. | Select when interfacing with legacy 5 V peripherals or requiring wider VCC margin. |
| ON Semiconductor MC68HC11E9CP | Not a drop-in replacement: integrated MCU with on-chip 512 B RAM; no external parallel bus interface. | Replaces entire controller + memory subsystem; requires full firmware porting and PCB redesign. | Consider only for new designs targeting cost reduction through SoC consolidation-not for SRAM replacement. |
Compared with IS62C256AL-70QLI, CY62256VNLL-70ZXC offers lower standby current (5 µA vs. 10 µA) and tighter industrial qualification; versus MC68HC11E9CP, it preserves existing parallel bus architecture and avoids firmware migration, making it optimal for memory-only upgrades.
Availability
CY62256VNLL-70ZXC is available at Aetrix Electronics and suitable for industrial PLC memory buffers, automotive body control modules, medical diagnostic instrument caches, and legacy industrial HMI controllers requiring stable component supply across long-lifecycle programs.
Supply support for CY62256VNLL-70ZXC 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 fabless semiconductor company specializing in memory, microcontrollers, and connectivity solutions for industrial, automotive, and consumer applications.
The CY62256VN series was designed specifically for reliable, low-power, pin-compatible replacement of legacy 28-pin SRAMs in space- and thermal-constrained embedded systems requiring deterministic timing and long-term supply stability.
FAQ
Is CY62256VNLL-70ZXC compatible with 5 V logic systems?
No. CY62256VNLL-70ZXC operates strictly within 2.7 V to 3.6 V and is not 5 V tolerant. Its VIH threshold is 2.2 V minimum, and absolute maximum input voltage is VCC + 0.3 V. Interfacing with 5 V microcontrollers requires level-shifting circuitry or logic translation ICs to avoid damage or unreliable operation.
Does this SRAM require an external clock or refresh signal?
No. CY62256VNLL-70ZXC is a fully static RAM: it retains data indefinitely as long as VCC is applied and CE remains asserted or in data retention mode (VCC ≥ 1.4 V). No clock, refresh cycle, or periodic access is needed-unlike DRAM or pseudo-SRAM devices.
What is the maximum data retention time when VCC drops to 1.4 V?
Data retention is indefinite at VCC ≥ 1.4 V, provided ambient temperature remains within specification (–40 °C to +85 °C) and no input exceeds VCC + 0.3 V. The device draws ≤6 µA (industrial grade) in retention mode, enabling multi-year backup with coin-cell batteries in properly designed circuits.
Can CY62256VNLL-70ZXC be used in place of CY62256NLL-70ZXC?
Yes-CY62256VNLL-70ZXC is the enhanced version of CY62256NLL-70ZXC, featuring improved data retention current (ISB2 ≤5 µA vs. ≤10 µA), tighter VCC min (2.7 V vs. 3.0 V), and extended automotive-E qualification. All pinouts, timing, and logic behavior are identical; it is a direct, backward-compatible upgrade.
CY62256VNLL-70ZXC 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:
- 70ns
- Access Time:
- 70 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP I
CY62256VNLL-70ZXC FAQ
1.How can I place an order for CY62256VNLL-70ZXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY62256VNLL-70ZXC 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 CY62256VNLL-70ZXC reliable?
The price and inventory of CY62256VNLL-70ZXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY62256VNLL-70ZXC is usually 5 days.
3.What payment methods are accepted for CY62256VNLL-70ZXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY62256VNLL-70ZXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY62256VNLL-70ZXC?
CY62256VNLL-70ZXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY62256VNLL-70ZXC 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 CY62256VNLL-70ZXC?
For technical support, including CY62256VNLL-70ZXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY62256VNLL-70ZXC requirements.
6.How does Aetrix verify that CY62256VNLL-70ZXC is sourced from the original manufacturer or authorized distributors?
All CY62256VNLL-70ZXC 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 CY62256VNLL-70ZXC meets industry standards.
7.What is the process for return or replacement of CY62256VNLL-70ZXC?
All CY62256VNLL-70ZXC units undergo pre-shipment inspection (PSI). If there is an issue with CY62256VNLL-70ZXC, 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 CY62256VNLL-70ZXC part is unused and in its original packaging.
Return procedure for CY62256VNLL-70ZXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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