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Infineon Technologies CY62256VLL-70ZXIT
- Part No.:
- CY62256VLL-70ZXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
CY62256VLL-70ZXIT.pdf
- Description:
- IC SRAM 256KBIT PAR 28TSOP I
- Quantity:
- Payment:
- Shipping:
Inventory:3,340
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Product details
Overview
CY62256VLL-70ZXIT from Cypress Semiconductor is a 256 Kbit (32K × 8) CMOS static RAM with 70 ns access time, TTL-compatible I/O, and automatic CE-controlled power-down. It operates from 2.7 V to 3.6 V across industrial temperature range (–40°C to +85°C), features tri-state outputs, and supports memory expansion via active-low CE and OE controls. Used in embedded controllers, industrial PLCs, and legacy instrumentation requiring non-volatile SRAM backup.
For engineers reviewing the CY62256VLL-70ZXIT datasheet, CY62256VLL-70ZXIT pinout, CY62256VLL-70ZXIT application, or CY62256VLL-70ZXIT equivalent, key selection criteria include 70 ns read cycle time, 0.1 µA typical standby current (ISB2), 28-pin narrow SOIC package compatibility, and CE/OE/WE control logic timing compliance per Rev. *F specification.
Technical Context
The CY62256VLL-70ZXIT implements a 32K × 8 asynchronous SRAM array with full address decoding (A0–A14), bidirectional I/O0–I/O7 bus, and three independent control inputs: CE (chip enable), OE (output enable), and WE (write enable). All control signals are active-low and fully compatible with TTL voltage thresholds.
Its power management relies on automatic CE-driven power-down mode, reducing ICC to ≤5 µA (industrial) when CE is HIGH, while maintaining data retention down to VCC = 1.4 V. The device uses CMOS process technology for optimized speed/power trade-off and supports multiple package variants including Pb-free 28-pin narrow SOIC (ZXIT suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256 Kbit (32,768 × 8 bits); supports byte-wide data interface without external demultiplexing. |
| Access Time (tAA) | 70 ns max at VCC = 2.7–3.6 V; ensures compatibility with 14 MHz bus systems. |
| Supply Voltage Range | 2.7 V to 3.6 V; enables direct interfacing with 3.3 V logic families and mixed-voltage designs. |
| Standby Current (ISB2) | 0.1 µA typ. / 10 µA max (industrial); enables ultra-low-power hold mode during system sleep. |
| Operating Temperature | –40°C to +85°C; qualified for industrial-grade reliability in harsh ambient conditions. |
| Output Drive | IOL = 2.1 mA / IOH = –1.0 mA at VCC = 2.7 V; meets TTL output loading requirements. |
| Data Retention Voltage | VDR = 1.4 V min; allows battery-backed operation using single-cell LiFePO₄ or coin cell sources. |
Pinout & Package
Package: 28-pin narrow SOIC (ZXIT suffix denotes Pb-free, industrial temperature, tape-and-reel packaging).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus supporting full 32K-word addressing; no internal latching required. |
| I/O0–I/O7 | Bidirectional Data Bus | Tri-state controlled by OE and CE; functions as input during write, output during read. |
| CE | Chip Enable | Active-low global select; drives automatic power-down when HIGH, disabling all outputs and core logic. |
| OE | Output Enable | Active-low output gate; enables data bus drivers only when CE is also LOW. |
| WE | Write Enable | Active-low write strobe; initiates write cycle when CE and WE both LOW; determines R/W direction. |
| VCC | Power Supply | Single 2.7–3.6 V supply; no separate VDD/VSS separation or auxiliary rails needed. |
| GND | Ground Reference | Common return path for all I/O and core logic; requires low-impedance PCB grounding. |
Key Features
| Feature | Design Value |
|---|---|
| 70 ns access time | Enables real-time data buffering in microcontroller-based motion control loops with <100 ns timing margins. |
| Automatic CE power-down | Reduces standby current to <10 µA without external logic, simplifying low-power system design. |
| TTL-compatible I/O | Eliminates level-shifting circuitry when interfacing with legacy 5 V microcontrollers or FPGAs. |
| 2.7–3.6 V operation | Supports direct connection to 3.3 V LDOs and battery-backed supplies without regulator overhead. |
| Data retention at 1.4 V | Permits use of low-voltage backup sources (e.g., 1.5 V alkaline or 1.8 V supercapacitor) without data loss. |
Applications
| Industrial PLC Data Buffer | Medical Instrumentation Memory |
|---|---|
|
Use Scenario: Real-time acquisition of analog sensor data in programmable logic controllers with deterministic scan cycles. IC Role / Device Role / Timing Role: Asynchronous SRAM buffer holding intermediate process values between CPU fetches and I/O module updates. Use Value: 70 ns tAA ensures sub-microsecond data availability for 10 kHz control loops; ISB2 ≤10 µA extends battery life during brownout events. |
Use Scenario: Storing calibration coefficients and patient waveform history in portable ECG monitors. IC Role / Device Role / Timing Role: Non-volatile data store retaining critical settings during main power interruption. Use Value: VDR = 1.4 V allows retention from single 1.5 V alkaline cell; narrow SOIC footprint fits compact handheld PCB layouts. |
| Legacy Industrial HMI Display Cache | Automotive Body Control Module Backup RAM |
|
Use Scenario: Caching GUI bitmap assets and menu state in monochrome LCD HMIs with 8-bit parallel interfaces. IC Role / Device Role / Timing Role: Byte-accessible memory mapped directly to microcontroller's external bus interface. Use Value: TTL-compatible I/O eliminates level shifters; 28-pin SOIC eases hand-soldering during low-volume repair operations. |
Use Scenario: Preserving door lock status, seat position, and mirror settings during vehicle ignition-off periods. IC Role / Device Role / Timing Role: Battery-backed SRAM operating in extended temperature range (–40°C to +85°C). Use Value: Qualified industrial temp grade ensures reliability at under-hood temperatures; CE-driven auto-power-down minimizes parasitic drain. |
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 5 V tolerant I/O (VCC = 5 V); higher ISB2 (25 µA max). | Requires 5 V supply rail; not suitable for 3.3 V-only systems without level translation. | Select if legacy 5 V controller interface is mandatory and board space permits larger SOIC-28 footprint. |
| ON Semiconductor MC68HC11EVN | Not a drop-in replacement: integrated MCU with on-chip 256 B RAM; no external parallel bus interface. | Replaces entire controller + memory subsystem; requires firmware rewrite and PCB redesign. | Only consider for greenfield designs where integration outweighs migration cost and timing predictability loss. |
Compared with IS62C256AL-70QLI, CY62256VLL-70ZXIT offers lower standby current and native 3.3 V operation, while MC68HC11EVN trades external memory flexibility for embedded control integration-neither provides pin-for-pin or functional equivalence without hardware or software changes.
Availability
CY62256VLL-70ZXIT is available at Aetrix Electronics and suitable for industrial PLCs, medical instrumentation, legacy HMI displays, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY62256VLL-70ZXIT 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) designs high-reliability memory and programmable solutions for industrial, automotive, and communications markets.
The CY62256V series targets cost-sensitive, space-constrained embedded systems needing reliable, low-power parallel SRAM with industrial temperature qualification and long-term supply assurance.
FAQ
What is the minimum VCC required to retain data in CY62256VLL-70ZXIT?
Data retention is guaranteed down to VCC = 1.4 V, as specified in the Data Retention Characteristics table (Page 5). At this voltage, ICCDR remains ≤3 µA (commercial) or ≤6 µA (industrial), enabling operation from single-cell alkaline or low-voltage supercapacitor backup sources without data loss.
Can CY62256VLL-70ZXIT be used with a 5 V microcontroller bus?
No-its I/O pins are not 5 V tolerant. Input voltage limits are –0.5 V to VCC + 0.3 V (max 3.9 V at VCC = 3.6 V). Direct connection to 5 V buses risks damage. Level-shifting circuitry or a 3.3 V–compatible controller is required for safe operation.
Does CY62256VLL-70ZXIT require an external clock signal?
No-it is an asynchronous SRAM with no clock input. All operations are controlled by edge- and level-sensitive signals: CE, OE, and WE. Timing is governed solely by setup/hold relationships defined in the Switching Characteristics table (Page 5), eliminating clock tree design complexity.
What is the thermal resistance (ΘJA) of the 28-pin narrow SOIC package?
The ΘJA (junction-to-ambient) for the narrow SOIC package is 68.45 °C/W under standard test conditions (still air, soldered on a 3 × 4.5 inch, 2-layer PCB). This value informs thermal design margining for continuous operation at maximum ambient temperature (85°C) and full ICC load (30 mA).
CY62256VLL-70ZXIT 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP I
CY62256VLL-70ZXIT FAQ
1.How can I place an order for CY62256VLL-70ZXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY62256VLL-70ZXIT 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-70ZXIT reliable?
The price and inventory of CY62256VLL-70ZXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY62256VLL-70ZXIT is usually 5 days.
3.What payment methods are accepted for CY62256VLL-70ZXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY62256VLL-70ZXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY62256VLL-70ZXIT?
CY62256VLL-70ZXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY62256VLL-70ZXIT 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-70ZXIT?
For technical support, including CY62256VLL-70ZXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY62256VLL-70ZXIT requirements.
6.How does Aetrix verify that CY62256VLL-70ZXIT is sourced from the original manufacturer or authorized distributors?
All CY62256VLL-70ZXIT 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-70ZXIT meets industry standards.
7.What is the process for return or replacement of CY62256VLL-70ZXIT?
All CY62256VLL-70ZXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY62256VLL-70ZXIT, 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-70ZXIT part is unused and in its original packaging.
Return procedure for CY62256VLL-70ZXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY62256VLL-70ZXIT Tags
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