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Infineon Technologies CY62256VLL-70SNC
- Part No.:
- CY62256VLL-70SNC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY62256VLL-70SNC.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,547
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Product details
Overview
CY62256VLL-70SNC 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, automatic CE-controlled power-down (<5 µA standby), and tri-state outputs for bus sharing in embedded microcontroller systems.
For engineers reviewing the CY62256VLL-70SNC datasheet, CY62256VLL-70SNC pinout, CY62256VLL-70SNC application, or CY62256VLL-70SNC equivalent, key selection criteria include guaranteed 70 ns read timing under industrial conditions, low-voltage operation down to 2.7 V, CE/OE/WE control logic compatibility with 8-bit microcontrollers, and narrow SOIC-28 packaging for space-constrained PCB layouts.
Technical Context
The CY62256VLL-70SNC implements a fully static 32K × 8 memory array with asynchronous parallel interface. Its dual active-low control architecture-CE (chip enable) and OE (output enable)-enables seamless memory expansion without external gating logic, while WE (write enable) provides precise write strobing independent of address transitions.
Power management is handled via automatic CE-driven power-down mode, reducing ICC to ≤5 µA (ISB2, industrial grade) when CE is deasserted. All inputs meet TTL voltage thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V), and outputs drive ±2.1 mA with VOH ≥ 2.4 V and VOL ≤ 0.4 V at VCC = 2.7 V, ensuring robust interfacing with legacy 3.3 V and mixed-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256 Kbit (32,768 × 8 bits); supports byte-wide data bus without multiplexing or external latching. |
| Access Time (tAA) | 70 ns max at VCC = 2.7–3.6 V and TA = –40°C to +85°C; enables direct interface with 10–14 MHz microcontrollers. |
| VCC Range | 2.7 V to 3.6 V; compatible with regulated 3.3 V rails and battery-backed systems with brown-out tolerance. |
| Standby Current (ISB2) | ≤5 µA (industrial grade); enables ultra-low-power retention in sleep modes of portable or remote-sensor applications. |
| Operating Temperature | –40°C to +85°C; qualified for industrial control, motor drives, and automotive body electronics environments. |
| Package | 28-pin narrow SOIC (0.300" width); footprint-compatible with legacy SRAMs and suitable for reflow soldering per JEDEC J-STD-020. |
| I/O Drive Strength | IOH = –1.0 mA, IOL = 2.1 mA at VCC = 2.7 V; sufficient to drive 10 TTL loads or terminate short PCB traces without buffers. |
Pinout & Package
Package: 28-pin narrow SOIC (0.300" width), RoHS-compliant, lead-free option available (SNC suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus; selects one of 32,768 memory locations; no internal latching-requires stable address during CE/OE assertion. |
| I/O0–I/O7 | Bidirectional Data Bus | Tri-state CMOS I/O; functions as input during write (WE LOW), output during read (OE LOW), high-Z otherwise. |
| CE | Chip Enable (active LOW) | Primary device select; asserts internal circuitry and enables power-down when HIGH; required for all operations. |
| OE | Output Enable (active LOW) | Controls I/O direction only; must be LOW for read data output; does not affect write cycle timing. |
| WE | Write Enable (active LOW) | Controls write/read mode; LOW initiates write (data latched on rising edge of WE or CE); HIGH enables read path. |
| VCC | Power Supply | 2.7–3.6 V core supply; decoupling capacitor (0.1 µF) required within 10 mm of Pin 28 for noise immunity. |
| GND | Ground Reference | Signal and power ground return; must be connected to low-impedance plane to maintain VIH/VIL margins. |
Key Features
| Feature | Design Value |
|---|---|
| 70 ns guaranteed access time | Meets timing closure for 14 MHz bus clocks without wait states in 8-bit MCU designs (e.g., PIC18, 8051 derivatives). |
| Automatic CE power-down | Reduces ICC to ≤5 µA without external control logic-critical for battery-powered data loggers and sensor nodes. |
| TTL-compatible interface | Accepts standard 3.3 V logic levels without level shifters; simplifies integration with FPGA I/O banks and microcontroller GPIOs. |
| Tri-state output drivers | Enables direct connection to shared data buses (e.g., Z80, 68K, or custom controllers) without external bus transceivers. |
| Industrial temperature rating | Validated operation from –40°C to +85°C ensures reliability in factory automation PLCs and outdoor telemetry units. |
Applications
| Industrial PLC Memory Buffer | Medical Device Data Logger |
|---|---|
|
Use Scenario: Stores real-time sensor readings and configuration parameters in programmable logic controllers operating in factory-floor environments with EMI and thermal cycling. IC Role / Device Role / Timing Role: Byte-accessible nonvolatile-adjacent buffer; provides deterministic 70 ns read/write latency for cyclic I/O scanning at 10 ms intervals. Use Value: Industrial temp rating and <5 µA standby current ensure uninterrupted operation during brownouts and extended idle periods between scan cycles. |
Use Scenario: Captures patient vital signs (ECG, SpO₂) at 1 kHz sampling rate in portable diagnostic equipment with limited battery capacity. IC Role / Device Role / Timing Role: High-speed scratchpad memory for pre-processing pipeline; interfaces directly to ADC controller and ARM Cortex-M0+ DMA engine. Use Value: TTL-compatible I/O and 2.7 V minimum VCC allow direct connection to low-power microcontrollers without level-shifting, reducing BOM count. |
| Automotive Body Control Module | Legacy Industrial HMI Controller |
|
Use Scenario: Holds runtime variables and calibration tables in door module ECUs exposed to under-hood temperature extremes and load-dump transients. IC Role / Device Role / Timing Role: Non-critical volatile memory for transient state storage; accessed asynchronously by 8-bit MCU during wake-up sequences. Use Value: Automotive-grade ISB2 spec (≤130 µA) and –40°C to +125°C capability ensure data retention during cold cranking and hot-soak conditions. |
Use Scenario: Replaces obsolete 27C256 EPROM in retrofitted CNC machine controllers requiring field-updatable firmware and parameter storage. IC Role / Device Role / Timing Role: Drop-in SRAM replacement for UV-erasable ROM sockets; supports in-system writes via existing address/data bus wiring. Use Value: Narrow SOIC-28 footprint matches legacy board layouts; CE/OE/WE pinout identical to industry-standard 28-pin parallel memories. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISSI IS62C256AL-70QLI | Same 32K × 8 organization, 70 ns speed, but rated only to +70°C (commercial grade); ISB2 = 1 µA typical at 25°C. | Lacks industrial temperature qualification; unsuitable for environments exceeding 70°C ambient. | Select when cost sensitivity outweighs extended temperature need and board-level thermal management ensures <70°C junction. |
| ON Semiconductor MC68HC11E9CP | Not a drop-in replacement-integrated MCU with 512 B on-chip RAM; no external parallel bus interface. | Replaces system architecture rather than discrete memory; requires full firmware and hardware redesign. | Consider only for greenfield designs where consolidation of memory and processing reduces total component count. |
Compared with IS62C256AL-70QLI, CY62256VLL-70SNC delivers verified industrial temperature operation and higher guaranteed ISB2 margin (≤5 µA vs. unqualified commercial spec), while MC68HC11E9CP eliminates external memory entirely but forfeits design reuse and field-upgrade flexibility.
Availability
CY62256VLL-70SNC is available at Aetrix Electronics and suitable for industrial PLCs, portable medical data loggers, and automotive body control modules requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for CY62256VLL-70SNC 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 computing applications.
The CY62256V series was engineered specifically for low-voltage, low-power parallel SRAM needs in resource-constrained embedded systems-emphasizing timing predictability, wide VCC tolerance, and seamless upgrade paths from older 5 V SRAMs.
FAQ
What is the maximum clock frequency supported by CY62256VLL-70SNC?
CY62256VLL-70SNC is an asynchronous SRAM and does not use a clock signal. Its maximum operational speed is defined by access time: 70 ns read cycle time (tRC) supports effective bus rates up to ~14 MHz when interfaced with microcontrollers having compatible timing margins and no wait states.
Can CY62256VLL-70SNC operate at 2.5 V?
No. The absolute minimum VCC specified is 2.7 V across all temperature ranges. Operation below 2.7 V violates the device's DC characteristics-VOH, VOL, and internal timing margins are not guaranteed, and data retention may fail.
Is CY62256VLL-70SNC pin-compatible with the older CY62256N-70PC?
Yes-both use identical 28-pin narrow SOIC packaging and share identical pin functions (A0–A14, I/O0–I/O7, CE, OE, WE, VCC, GND). However, CY62256VLL-70SNC adds industrial temperature support and lower standby current, making it a functional and mechanical upgrade.
Does CY62256VLL-70SNC require external pull-up resistors on control lines?
No. All control inputs (CE, OE, WE) have TTL-compatible thresholds and do not require external biasing. However, floating inputs must be avoided-designs should tie unused address or control lines to VCC or GND via 10 kΩ resistors to prevent metastability and excess current draw.
CY62256VLL-70SNC 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:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOIC
CY62256VLL-70SNC FAQ
1.How can I place an order for CY62256VLL-70SNC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY62256VLL-70SNC 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-70SNC reliable?
The price and inventory of CY62256VLL-70SNC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY62256VLL-70SNC is usually 5 days.
3.What payment methods are accepted for CY62256VLL-70SNC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY62256VLL-70SNC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY62256VLL-70SNC?
CY62256VLL-70SNC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY62256VLL-70SNC 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-70SNC?
For technical support, including CY62256VLL-70SNC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY62256VLL-70SNC requirements.
6.How does Aetrix verify that CY62256VLL-70SNC is sourced from the original manufacturer or authorized distributors?
All CY62256VLL-70SNC 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-70SNC meets industry standards.
7.What is the process for return or replacement of CY62256VLL-70SNC?
All CY62256VLL-70SNC units undergo pre-shipment inspection (PSI). If there is an issue with CY62256VLL-70SNC, 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-70SNC part is unused and in its original packaging.
Return procedure for CY62256VLL-70SNC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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