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Infineon Technologies CY62256VLL-70ZXCT
- Part No.:
- CY62256VLL-70ZXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
CY62256VLL-70ZXCT.pdf
- Description:
- IC SRAM 256KBIT PAR 28TSOP I
- Quantity:
- Payment:
- Shipping:
Inventory:4,223
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Product details
Overview
CY62256VLL-70ZXCT from Cypress Semiconductor is a 256 Kbit (32K × 8) CMOS static RAM with 70 ns access time, 2.7–3.6 V supply range, and industrial temperature support (–40°C to +85°C). It features TTL-compatible I/O, active-low CE/OE/WE controls, automatic power-down (<5 µA standby), and is packaged in Pb-free 28-pin narrow SOIC.
For engineers reviewing the CY62256VLL-70ZXCT datasheet, CY62256VLL-70ZXCT pinout, CY62256VLL-70ZXCT application, or CY62256VLL-70ZXCT equivalent, this device serves as a drop-in SRAM replacement in legacy microcontroller systems, industrial PLCs, and embedded data buffers requiring deterministic timing and low-voltage operation.
Technical Context
The CY62256VLL-70ZXCT implements a fully static 32K × 8 memory array with asynchronous read/write control via independent CE, OE, and WE signals. Its tri-state I/O drivers and automatic CE-driven power-down enable seamless integration into bus-shared architectures without external logic.
It operates across 2.7–3.6 V with guaranteed 70 ns tAA and tRC, supports TTL-level input thresholds (VIH = 2.2 V, VIL = 0.8 V), and delivers 11 mA typical active current (ICC) and ≤5 µA ISB2 standby current at VCC = 3.6 V and TA = 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256 Kbit (32,768 × 8 bits); supports byte-wide parallel interface for 8-bit MCU buses. |
| Access Time | 70 ns max tAA and tRC; ensures compatibility with 14 MHz Z80, 8051, and 68K-based systems. |
| Supply Voltage | 2.7 V to 3.6 V; enables direct use with 3.3 V logic rails and backward compatibility with 3.0 V industrial supplies. |
| Standby Current | ≤5 µA (ISB2, industrial temp); reduces system power by >99% during idle cycles without external gating. |
| Operating Temp | –40°C to +85°C; qualified for industrial control cabinets, motor drives, and factory automation environments. |
| I/O Interface | TTL-compatible inputs/outputs; eliminates level-shifter requirements when interfacing with legacy 5 V-tolerant 3.3 V controllers. |
| Package | 28-pin narrow SOIC (300 mil); standard footprint compatible with automated SMT assembly and IPC-7351B land patterns. |
Pinout & Package
Package: 28-pin narrow SOIC (300 mil width), RoHS-compliant, Pb-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus (32K depth); A0 = LSB, A14 = MSB; no internal latching - requires stable address during CE LOW. |
| I/O0–I/O7 | Bidirectional Data Bus | Tri-state CMOS I/O lines; driven during READ (CE+OE LOW, WE HIGH), high-Z otherwise; supports shared bus topology. |
| CE | Chip Enable (active LOW) | Primary chip-select signal; initiates automatic power-down when HIGH, enabling zero-power standby in multi-chip systems. |
| OE | Output Enable (active LOW) | Controls output driver state only; does not affect power mode - outputs tri-state when HIGH, even if CE is LOW. |
| WE | Write Enable (active LOW) | Controls R/W direction: LOW = write (data latched on rising edge of WE or CE), HIGH = read; no write cycle required for read. |
| VCC | Power Supply | 2.7–3.6 V core supply; decoupling capacitor (0.1 µF) required within 10 mm of Pin 28 per layout guidelines. |
| GND | Ground Reference | Signal and power ground reference (Pin 14); must be connected to low-impedance PCB plane to minimize noise coupling into I/O lines. |
Key Features
| Feature | Design Value |
|---|---|
| 70 ns access time with full voltage/temp coverage | Guaranteed tAA ≤ 70 ns across 2.7–3.6 V and –40°C to +85°C - eliminates derating calculations for industrial timing budgets. |
| Automatic CE-controlled power-down | Reduces ICC to ≤5 µA without external logic or sleep commands - ideal for battery-backed or energy-constrained systems. |
| TTL-compatible I/O thresholds | VIH = 2.2 V min, VIL = 0.8 V max - interoperable with mixed-voltage designs using 3.3 V cores and 5 V peripherals. |
| Tri-state output drivers with fast enable/disable | tLZOE = 5 ns, tHZOE = 25 ns - minimizes bus contention windows in multi-SRAM or SRAM+peripheral configurations. |
| Industrial-grade reliability | Qualified to –40°C to +85°C ambient, 1000-hour HTOL, and >2000 V HBM ESD - suitable for uncontrolled industrial enclosures. |
Applications
| Industrial PLC Data Buffer | Legacy Microcontroller Memory Expansion |
|---|---|
Use Scenario: Real-time I/O scan buffering in DIN-rail mounted programmable logic controllers with 8-bit data paths. IC Role / Device Role / Timing Role: Asynchronous parallel SRAM providing deterministic 70 ns read/write latency for cyclic process image updates. Use Value: Eliminates wait states in 8051- and Z80-based CPU subsystems while maintaining <5 µA standby during scan idle periods. |
Use Scenario: Adding external RAM to vintage 8-bit embedded controllers (e.g., Motorola 68HC11, Intel 80C51) with limited on-chip memory. IC Role / Device Role / Timing Role: Byte-addressable memory mapped at fixed address space, controlled via discrete CE/OE/WE decoding logic. Use Value: Enables firmware upgrades and dynamic data logging without redesigning CPU bus timing or adding glue logic. |
| Factory Automation Controller Cache | Medical Instrument Data Acquisition Buffer |
Use Scenario: Storing transient sensor fusion results in servo motion controllers where jitter-sensitive real-time response is critical. IC Role / Device Role / Timing Role: Low-latency scratchpad memory accessed directly by FPGA or ASIC co-processors via parallel bus. Use Value: Provides sub-100 ns deterministic access with zero clock domain crossing overhead - superior to DDR or SPI alternatives. |
Use Scenario: Capturing high-fidelity analog waveform samples (e.g., ECG, EEG) at 10–100 kSPS before host processor transfer. IC Role / Device Role / Timing Role: Burst-write buffer accepting parallel ADC output data under WE-controlled strobes, then read sequentially by ARM Cortex-M host. Use Value: Reduces host CPU interrupt load by 70% compared to FIFO-based solutions, improving system determinism and power efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISSI IS62WV2568BLL-70NLI | Same 32K × 8 organization, 70 ns speed, but uses 2.7–3.6 V and specifies 10 µA ISB2 (vs. 5 µA). | Valid for commercial/industrial use, but higher standby current may impact battery-backed systems with >1-year hold-up. | Select if dual-sourcing is required and ISB2 margin is acceptable; identical pinout and timing behavior. |
| ON Semiconductor MC68HC11EV16 | Not a direct SRAM - integrated MCU with 16 KB on-chip RAM; lacks external 32K × 8 parallel interface. | Replaces entire controller + memory subsystem; requires full firmware porting and board redesign. | Only consider for greenfield designs targeting long-term obsolescence mitigation - not a drop-in replacement. |
Compared with IS62WV2568BLL-70NLI, CY62256VLL-70ZXCT offers lower standby current and tighter industrial qualification; versus MC68HC11EV16, it preserves existing hardware architecture and avoids software migration risk.
Availability
CY62256VLL-70ZXCT is available at Aetrix Electronics and suitable for industrial PLCs, legacy microcontroller upgrades, and medical data acquisition systems requiring stable component supply and long-lifecycle support.
Supply support for CY62256VLL-70ZXCT 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 devices for industrial and automotive markets.
The CY62256V series was designed specifically for drop-in replacement of obsolete 28-pin 256 Kbit SRAMs in cost-sensitive, long-lifecycle industrial systems - emphasizing pin compatibility, wide voltage tolerance, and robust thermal performance.
FAQ
Is CY62256VLL-70ZXCT pin-compatible with the original CY62256-70PC?
Yes - CY62256VLL-70ZXCT uses the same 28-pin narrow SOIC footprint and identical pin mapping as CY62256-70PC, including A0–A14, I/O0–I/O7, CE, OE, WE, VCC, and GND. The "VLL" suffix denotes low-voltage operation (2.7–3.6 V), while "PC" was 5 V-only; voltage range change does not affect pinout or logic behavior.
Does CY62256VLL-70ZXCT support battery backup operation?
Yes - it guarantees data retention down to VCC = 1.4 V with ICCDR ≤ 3 µA (commercial) and ≤ 6 µA (industrial), enabling use with coin-cell or supercapacitor backup circuits. The tCDR (chip deselect to data retention time) is 0 ns, meaning retention begins immediately upon CE deassertion.
Can CY62256VLL-70ZXCT be used with 5 V logic interfaces?
No - its inputs are not 5 V tolerant. VIH max is VCC + 0.3 V (≤3.9 V at 3.6 V supply), and absolute max input voltage is VCC + 0.5 V. Direct connection to 5 V buses risks damage; a level translator (e.g., TXB0108) or resistive divider is required for safe interfacing.
What is the maximum clock frequency supported for burst reads?
CY62256VLL-70ZXCT is an asynchronous SRAM and has no clock input. Its maximum effective throughput is determined by tRC = 70 ns, supporting up to ~14.3 MHz continuous read cycles (1/70 ns) when CE and OE remain asserted - no clock signal is involved in its operation.
CY62256VLL-70ZXCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- MOBL™
- Package/Case:
- 28-TSSOP (0.465", 11.80mm 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:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP I
CY62256VLL-70ZXCT FAQ
1.How can I place an order for CY62256VLL-70ZXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY62256VLL-70ZXCT 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 CY62256VLL-70ZXCT reliable?
The price and inventory of CY62256VLL-70ZXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY62256VLL-70ZXCT is usually 5 days.
3.What payment methods are accepted for CY62256VLL-70ZXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY62256VLL-70ZXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY62256VLL-70ZXCT?
CY62256VLL-70ZXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY62256VLL-70ZXCT 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 CY62256VLL-70ZXCT?
For technical support, including CY62256VLL-70ZXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY62256VLL-70ZXCT requirements.
6.How does Aetrix verify that CY62256VLL-70ZXCT is sourced from the original manufacturer or authorized distributors?
All CY62256VLL-70ZXCT 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 CY62256VLL-70ZXCT meets industry standards.
7.What is the process for return or replacement of CY62256VLL-70ZXCT?
All CY62256VLL-70ZXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY62256VLL-70ZXCT, 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 CY62256VLL-70ZXCT part is unused and in its original packaging.
Return procedure for CY62256VLL-70ZXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY62256VLL-70ZXCT Tags
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