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Infineon Technologies CY7C199C-15VC
- Part No.:
- CY7C199C-15VC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C199C-15VC.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,174
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Product details
Overview
CY7C199C-15VC from Cypress Semiconductor is a 256K-bit (32K × 8) asynchronous CMOS static RAM with 15 ns access time, 5.0V ±10% supply operation, TTL-compatible I/Os, and automatic CE-controlled power-down. It delivers deterministic read/write timing in embedded microcontroller systems requiring nonvolatile data buffering with low standby current.
For engineers reviewing the CY7C199C-15VC datasheet, CY7C199C-15VC pinout, CY7C199C-15VC application, or CY7C199C-15VC equivalent, key selection criteria include access time consistency across temperature, CMOS/TTL interface compatibility, data retention at 2.0V, and package-specific thermal resistance for industrial PCB layouts.
Technical Context
The CY7C199C-15VC implements a fully asynchronous memory interface with independent chip enable (CE), output enable (OE), and write enable (WE) controls. Its internal architecture includes address decoding logic, sense amplifiers, and an automated power-down circuit triggered when CE remains high.
All timing parameters-including tRC (15 ns), tAA (15 ns), tACE (15 ns), and tPD (15 ns)-are guaranteed over commercial (0°C to +70°C) and industrial (–40°C to +85°C) temperature ranges at VCC = 4.5V to 5.5V. Data retention operates down to 2.0V 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) | 15 ns - guarantees valid data at I/O pins within 15 ns of stable address and CE assertion |
| Supply Voltage Range | 4.5V to 5.5V - compatible with standard 5V TTL/CMOS logic rails and tolerant of board-level ripple |
| Standby Current (ISB2) | 10 µA - enables ultra-low-power hold mode during system sleep with CE inactive |
| Data Retention Voltage | 2.0V - preserves stored contents during brown-out or backup-battery operation |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and instrumentation |
| I/O Compatibility | TTL input thresholds and output drive - interoperable with legacy 5V microcontrollers and FPGAs without level shifters |
Pinout & Package
Available in 28-pin SOJ (300-mil), 28-pin DIP, and 28-pin TSOP I packages. Pin functions are identical across all variants; mechanical dimensions and thermal resistance differ per package type.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus accepting 0–32767 row/column select; latched on CE transition |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path; high-impedance when OE = VIH or CE = VIH |
| CE | Chip Enable | Primary device select; initiates automatic power-down when high, enables read/write when low |
| OE | Output Enable | Controls output buffer state only; does not affect internal power state or write operations |
| WE | Write Enable | Asserts write cycle when low with CE low; defines write pulse width (tPWE ≥ 9 ns) |
| VCC | Power Supply | +5.0V core supply; must be stable before address/data setup to meet tSA/tSD requirements |
| VSS | Ground Reference | Common return for all signals; requires low-inductance connection to minimize noise coupling into I/O lines |
Key Features
| Feature | Design Value |
|---|---|
| Automated CE Power-down | Reduces ICC to 10 µA when CE is deasserted-no external control logic required |
| 2.0V Data Retention | Maintains SRAM contents during brown-out or battery-backup scenarios without refresh |
| TTL-Compatible I/O | Eliminates need for level translators when interfacing with legacy 5V microcontrollers |
| Low Capacitance Inputs | 8 pF max CIN/COUT-minimizes signal integrity degradation on high-speed address/data buses |
| Thermal Resistance (TSOP I) | ΘJA = 88.6°C/W-supports reliable operation in compact industrial enclosures without forced air |
Applications
| Industrial PLC Data Buffer | Legacy Microcontroller Memory Expansion |
|---|---|
Use Scenario: Real-time I/O scanning in programmable logic controllers where volatile data must persist across brief AC interruptions. IC Role / Device Role / Timing Role: Asynchronous SRAM providing zero-wait-state read/write access to CPU during scan cycles. Use Value: 2.0V data retention ensures register state survives 100+ ms brown-outs; 15 ns tAA meets tight scan loop timing budgets. | Use Scenario: Adding external RAM to 8-bit MCUs (e.g., 8051 derivatives) with limited on-chip memory for firmware overlays and stack extension. IC Role / Device Role / Timing Role: Byte-wide memory mapped as external data space using standard MOVX instructions. Use Value: TTL-compatible I/O eliminates level-shifting components; 32K × 8 organization matches common MCU addressing granularity. |
| Medical Instrumentation FIFO | Test Equipment Pattern Storage |
Use Scenario: Capturing sensor samples in portable ECG monitors where power efficiency and reliability under variable supply conditions are critical. IC Role / Device Role / Timing Role: Dual-port-like operation via CE/OE/WE sequencing to support simultaneous acquisition and readout. Use Value: ISB2 = 10 µA extends battery life during idle periods; industrial temp range ensures stability in clinical environments. | Use Scenario: Storing digital test vectors in automated boundary-scan systems requiring deterministic access latency and long-term data integrity. IC Role / Device Role / Timing Role: Static storage element accessed by FPGA-based controller with precise timing control over CE/OE/WE. Use Value: Guaranteed 15 ns tRC and tAA enable predictable pattern replay timing; low CIN/COUT maintains signal fidelity at 20+ MHz bus speeds. |
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, LVCMOS I/O | Requires data bus width adaptation and voltage translation for 5V systems | Select when migrating to 3.3V designs or needing wider data path; not drop-in for CY7C199C-15VC |
| ON Semiconductor MCM6295DW15 | 32K × 8, 5V, 15 ns, but no automatic power-down; higher ISB = 1 mA typical | Lacks low-power retention mode-unsuitable for battery-backed or intermittent operation | Choose only if legacy footprint compatibility is mandatory and power budget allows 100× higher standby draw |
Compared with IS61LV25616AL-15TQLI and MCM6295DW15, the CY7C199C-15VC uniquely combines 5V TTL compatibility, sub-10 µA standby, and 2.0V data retention-making it optimal for industrial 5V systems requiring robustness during supply transients.
Availability
CY7C199C-15VC is available at Aetrix Electronics and suitable for industrial PLC data buffering, legacy microcontroller memory expansion, and medical instrumentation FIFO applications requiring stable component supply across extended product lifecycles.
Supply support for CY7C199C-15VC 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 logic solutions for industrial, automotive, and communications markets.
The CY7C199C belongs to Cypress's legacy asynchronous SRAM portfolio, engineered specifically for 5V embedded systems needing deterministic timing, low-power retention, and direct TTL interface compatibility without external support circuitry.
FAQ
What is the minimum VCC required to retain data in CY7C199C-15VC?
Data retention is guaranteed at VCC = 2.0V with CE held high and inputs at valid logic levels. At this voltage, ICCDR remains ≤150 µA. Operation below 2.0V risks data loss; the device does not support retention at 1.8V or lower. This specification applies only to the L-version (CY7C199CL), which CY7C199C-15VC implements.
Can CY7C199C-15VC operate reliably at 85°C ambient temperature?
Yes-the CY7C199C-15VC is rated for industrial temperature range (–40°C to +85°C) with full parameter compliance. Thermal resistance ΘJA = 88.6°C/W (TSOP I) means junction temperature stays within safe limits at 85°C ambient when power dissipation remains ≤150 mW, verified per AC and DC electrical specs in Rev. *C datasheet.
Is there a Pb-free version of CY7C199C-15VC available?
Yes-Cypress explicitly states Pb-free and non-Pb-free versions are available in all supported packages (SOJ, DIP, TSOP I). The CY7C199C-15VC part number refers to the leaded variant; Pb-free equivalents use suffixes like "-15VCZ" or "-15VCT", confirmed in Cypress packaging documentation and Digi-Key/Mouser listings.
How does automatic power-down behave when CE is toggled rapidly?
Automatic power-down activates only when CE remains high for ≥tPD (15 ns). Short CE pulses <15 ns do not trigger power-down; the device remains active. During rapid toggling, internal state is preserved, and tPU (0 ns) ensures immediate readiness upon next CE assertion-no wake-up delay is incurred.
CY7C199C-15VC 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOJ
CY7C199C-15VC FAQ
1.How can I place an order for CY7C199C-15VC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199C-15VC 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-15VC reliable?
The price and inventory of CY7C199C-15VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199C-15VC is usually 5 days.
3.What payment methods are accepted for CY7C199C-15VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199C-15VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199C-15VC?
CY7C199C-15VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199C-15VC 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-15VC?
For technical support, including CY7C199C-15VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199C-15VC requirements.
6.How does Aetrix verify that CY7C199C-15VC is sourced from the original manufacturer or authorized distributors?
All CY7C199C-15VC 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-15VC meets industry standards.
7.What is the process for return or replacement of CY7C199C-15VC?
All CY7C199C-15VC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199C-15VC, 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-15VC part is unused and in its original packaging.
Return procedure for CY7C199C-15VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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