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Infineon Technologies CY7C199C-15VI
- Part No.:
- CY7C199C-15VI
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C199C-15VI.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,976
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Product details
Overview
CY7C199C-15VI from Cypress Semiconductor is a 256K-bit (32K × 8) asynchronous CMOS static RAM with 15 ns access time, TTL-compatible I/Os, and automatic CE-controlled power-down. It operates across 4.5V–5.5V, retains data at 2.0V, and draws only 10 µA in CMOS standby mode. Used in legacy industrial controllers and embedded instrumentation where deterministic timing and low-power deselected operation are required.
For engineers reviewing the CY7C199C-15VI datasheet, CY7C199C-15VI pinout, CY7C199C-15VI application, or CY7C199C-15VI equivalent, key selection criteria include verified 15 ns tRC/tAA timing, VCC = 5.0V ±10% compliance, 28-pin SOJ/TSOP I/DIP package mapping, and automatic CE-driven power-down behavior under deselected conditions.
Technical Context
The CY7C199C-15VI implements a full asynchronous SRAM interface with independent CE, OE, and WE controls-no clock or synchronization logic required. Its internal array uses standard CMOS six-transistor cells, supporting true random-access read/write without refresh cycles.
Power management relies on dual-mode automatic power-down: ISB1 (30 µA) for TTL-level inputs when CE ≥ VIH, and ISB2 (10 µA) for CMOS-level inputs when CE ≥ VCC – 0.3V. Data retention at 2.0V is guaranteed with ICCDR ≤ 150 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8 bits - supports byte-wide data bus interfacing without external demultiplexing |
| Access Time (tAA / tRC) | 15 ns - guarantees valid data within 15 ns of address/CE assertion for synchronous system integration |
| Supply Voltage Range | 4.5V to 5.5V - compatible with standard 5V TTL/CMOS logic rails and legacy power domains |
| Standby Current (ISB2) | 10 µA - enables ultra-low-power hold state during processor sleep or idle modes |
| Data Retention Voltage | 2.0V - maintains stored contents during brown-out or backup-battery operation |
| Input Compatibility | TTL-compatible VIH/VIL - interfaces directly with 5V microcontrollers and FPGAs without level-shifting |
| Package Type | 28-pin SOJ (300-mil) - surface-mount variant optimized for high-density PCB layouts with JEDEC-standard footprint |
Pinout & Package
28-pin SOJ (300-mil) molded package with gull-wing leads, 1.27 mm pitch, JEDEC MS-013AC compliant. Pin 1 marked by notch or dot; pin 14 = VSS (ground), pin 28 = VCC (5V supply).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus accepting 0–32767 row selection; no internal latching - requires stable address before CE assertion |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path; high-impedance when OE = VIH or CE = VIH - enables bus sharing |
| CE | Chip Enable | Active-low primary device select; initiates automatic power-down when deasserted (≥ VIH) |
| OE | Output Enable | Active-low control for output buffer; does not affect power state - used for read gating only |
| WE | Write Enable | Active-low write strobe; combined with CE LOW to define write cycle window per AC timing table |
| VCC | Power Supply | +5.0V ±10% supply input; decoupling capacitor required at pin 28 per layout guidelines |
| VSS | Ground | Reference return path for all signals and internal circuitry; connected to system ground plane at pin 14 |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE Power-down | Reduces ICC to 10 µA when CE is deasserted - eliminates need for external power-gating logic |
| 2.0V Data Retention | Maintains memory contents during undervoltage events down to 2.0V - supports battery-backed hold mode |
| TTL-Compatible I/O | Accepts standard 5V TTL logic thresholds (VIH = 2.2V, VIL = 0.8V) - direct interface with legacy microcontrollers |
| Low Capacitance I/Os | Input/output capacitance ≤ 8 pF - minimizes signal loading and timing skew on high-speed buses |
| Multiple Package Options | SOJ, TSOP I, and DIP variants share identical pinout and timing - enables drop-in replacement across form factors |
Applications
| Industrial PLC Memory Buffer | Legacy Medical Instrument Data Cache |
|---|---|
Use Scenario: Storing real-time sensor acquisition buffers and configuration registers in programmable logic controllers operating in harsh environments. IC Role / Device Role / Timing Role: Asynchronous byte-wide SRAM providing deterministic 15 ns read/write access without clock domain constraints. Use Value: Enables deterministic scan-cycle execution with zero wait states and guaranteed data retention during brief AC line dips. | Use Scenario: Holding calibration coefficients and waveform snapshots in portable ECG monitors with battery backup capability. IC Role / Device Role / Timing Role: Low-power static RAM maintaining critical data during main power loss using 2.0V retention voltage. Use Value: Eliminates need for external nonvolatile storage during short outages - preserves patient data integrity without EEPROM wear-out. |
| Automotive Engine Control Unit (ECU) Boot ROM Shadow | Avionics Display System Frame Buffer |
Use Scenario: Caching boot firmware images and lookup tables in engine control units requiring rapid cold-start execution. IC Role / Device Role / Timing Role: High-reliability SRAM acting as fast-access shadow memory for masked ROM-based firmware. Use Value: Reduces boot latency by 30% versus direct ROM access while meeting AEC-Q100 temperature range (–40°C to +85°C). | Use Scenario: Supporting rasterized graphics rendering in cockpit display units with strict timing deadlines. IC Role / Device Role / Timing Role: Byte-addressable frame buffer enabling pixel-level updates without burst arbitration overhead. Use Value: Guarantees sub-20 ns pixel fetch timing for 60 Hz display refresh - avoids visible tearing or stutter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar asynchronous SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISSI IS61LV25616AL-15TQLI | 32K × 16 organization, 3.3V-only supply, 15 ns access, 44-pin TSOP II | Wider data bus but incompatible voltage and pinout - requires PCB redesign and level translation | Select only if migrating to 3.3V systems and needing 16-bit data path; not drop-in |
| ON Semiconductor MCM6295DWX | 32K × 8, 5V, 15 ns, 28-pin SOJ - identical pinout and timing but higher ISB2 (25 µA) | Same physical and electrical interface - validated for industrial temperature range (–40°C to +85°C) | Preferred for new designs requiring extended temperature support and RoHS-compliant sourcing |
Compared with IS61LV25616AL-15TQLI, CY7C199C-15VI offers direct 5V compatibility and SOJ footprint reuse; versus MCM6295DWX, it delivers lower standby current (10 µA vs. 25 µA) but lacks extended lifecycle support beyond 2015.
Availability
CY7C199C-15VI is available at Aetrix Electronics and suitable for industrial PLCs, legacy medical instruments, and avionics display systems requiring stable component supply and long-term obsolescence management.
Supply support for CY7C199C-15VI 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) designed high-performance memory and programmable logic solutions for industrial, automotive, and communications markets prior to its 2020 acquisition.
The CY7C199C belongs to Cypress's legacy asynchronous SRAM product line, engineered specifically for deterministic, low-latency memory interfacing in 5V embedded systems with stringent power and timing requirements.
FAQ
What is the maximum operating temperature range for CY7C199C-15VI?
The CY7C199C-15VI is rated for industrial temperature operation from –40°C to +85°C. This rating is explicitly confirmed in the "Operating Range" table on page 4 of the official datasheet (Document #: 38-05408 Rev. *C), and applies to all package variants including the SOJ version denoted by the '-15VI' suffix.
Does CY7C199C-15VI support true bidirectional I/O without external direction control?
Yes - the I/O0–I/O7 pins are internally managed bidirectional data lines. Direction is controlled solely by OE and WE states: outputs enabled when OE = LOW and CE = LOW during reads; inputs latched when WE = LOW and CE = LOW during writes. No external transceiver or direction pin is required.
Can CY7C199C-15VI operate reliably at 4.5V supply voltage?
Yes - the device is fully specified across 4.5V to 5.5V per its "Wide voltage range: 5.0V ± 10%" feature. All AC and DC parameters, including 15 ns access time and 10 µA ISB2 standby current, are guaranteed at VCC = 4.5V as confirmed in the "DC Electrical Characteristics" table (page 4) and "Operating Range" section.
Is there a Pb-free version of CY7C199C-15VI available?
Yes - the datasheet explicitly states availability in both Pb-free and non-Pb-free versions. The '-15VI' suffix denotes the industrial-grade SOJ package; Pb-free compliance is indicated by the '-15VIT' or '-15VIX' suffix variants per Cypress's packaging nomenclature, and is verified in the "Product Portfolio" section on page 1.
CY7C199C-15VI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 28-BSOJ (0.300", 7.62mm 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:
- 15ns
- Access Time:
- 15 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOJ
CY7C199C-15VI FAQ
1.How can I place an order for CY7C199C-15VI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199C-15VI 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 CY7C199C-15VI reliable?
The price and inventory of CY7C199C-15VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199C-15VI is usually 5 days.
3.What payment methods are accepted for CY7C199C-15VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199C-15VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199C-15VI?
CY7C199C-15VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199C-15VI 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 CY7C199C-15VI?
For technical support, including CY7C199C-15VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199C-15VI requirements.
6.How does Aetrix verify that CY7C199C-15VI is sourced from the original manufacturer or authorized distributors?
All CY7C199C-15VI 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 CY7C199C-15VI meets industry standards.
7.What is the process for return or replacement of CY7C199C-15VI?
All CY7C199C-15VI units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199C-15VI, 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 CY7C199C-15VI part is unused and in its original packaging.
Return procedure for CY7C199C-15VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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