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Infineon Technologies CY7C199CL-15VXC
- Part No.:
- CY7C199CL-15VXC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C199CL-15VXC.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:3,064
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Product details
Overview
CY7C199CL-15VXC from Cypress Semiconductor is a 256K-bit (32K × 8) asynchronous CMOS static RAM with 15 ns access time, 5.0V ±10% supply range, TTL-compatible I/Os, automatic CE-controlled power-down, and 2.0V data retention. It operates across industrial temperature (–40°C to +85°C) and is packaged in 28-pin TSOP I (Z28) for space-constrained embedded memory buffering.
For engineers reviewing the CY7C199CL-15VXC datasheet, CY7C199CL-15VXC pinout, CY7C199CL-15VXC application, or CY7C199CL-15VXC equivalent, key selection criteria include access time vs. standby current trade-offs, CE/OE/WE timing coordination in asynchronous bus interfaces, industrial-grade voltage tolerance, and TSOP I footprint compatibility with legacy SRAM-based controllers.
Technical Context
The CY7C199CL-15VXC implements a fully asynchronous memory interface with independent chip enable (CE), output enable (OE), and write enable (WE) controls. Its internal row/column decoder architecture supports concurrent address setup and data valid timing, with tAA = 15 ns and tACE = 15 ns under industrial conditions.
Power management is handled via dual-mode automatic power-down: ISB1 = 30 µA (TTL inputs) and ISB2 = 10 µA (CMOS inputs) when CE is deasserted, while data retention remains active down to VCC = 2.0V with ICCDR ≤ 150 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8 bits - provides byte-wide data bus interface without external data multiplexing |
| Access Time (tAA) | 15 ns - determines minimum read cycle interval in CPU or FPGA memory-mapped peripherals |
| VCC Operating Range | 4.5V to 5.5V - ensures compatibility with standard 5V logic rails and noise margin resilience |
| Standby Current (ISB2) | 10 µA at VCC ≥ 4.7V - enables low-power hold mode during processor sleep in battery-backed systems |
| Data Retention Voltage | 2.0V - allows memory state preservation during brown-out or controlled power sequencing |
| Operating Temperature | –40°C to +85°C - qualified for industrial control, motor drives, and telecom line cards |
| Package Type | 28-pin TSOP I (Z28, 8 mm × 13.4 mm) - surface-mount compatible with automated PCB assembly and thermal pad-free layout |
Pinout & Package
Package: 28-pin Thin Small Outline Package Type I (TSOP I), Z28 footprint, 8 mm × 13.4 mm body, 0.55 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus (32K depth); A0 least significant, A14 most significant |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path; high-impedance when OE = HIGH or CE = HIGH |
| CE | Chip Enable | Active-low device select; initiates automatic power-down when HIGH |
| OE | Output Enable | Active-low control of output drivers; does not affect power state |
| WE | Write Enable | Active-low signal enabling write cycles; must overlap with CE LOW |
| VCC | Power Supply | +5.0V ±10% core supply; decoupling required within 10 mm of pin 7 |
| VSS | Ground | Signal and power return; connected to pin 21 for low-inductance reference |
Key Features
| Feature | Design Value |
|---|---|
| Asynchronous Interface | No clock required - simplifies integration with microcontrollers lacking dedicated SRAM controllers |
| Automatic CE Power-down | Reduces standby current to 10 µA without external control logic or sleep-state firmware |
| TTL-Compatible I/Os | Direct interfacing with 5V microcontrollers (e.g., 8051, PIC18F) without level-shifting |
| 2.0V Data Retention | Maintains stored data during undervoltage events, supporting graceful shutdown in power-loss scenarios |
| Industrial Temperature Range | Validated operation from –40°C to +85°C - eliminates derating calculations for harsh-environment designs |
Applications
| Industrial PLC Memory Buffer | Legacy Microcontroller Data RAM |
|---|---|
|
Use Scenario: Real-time I/O scan buffer in programmable logic controllers requiring deterministic read/write latency and non-volatile data hold during mains interruption. IC Role / Device Role / Timing Role: Asynchronous byte-wide SRAM serving as volatile working memory for ladder logic execution engine. Use Value: 15 ns tAA ensures sub-30 ns instruction fetch cycles; 2.0V retention preserves last scan state for diagnostics after brown-out. |
Use Scenario: External data RAM expansion for 8-bit MCUs (e.g., AT89C51, PIC16F877A) with limited on-chip RAM and no built-in memory controller. IC Role / Device Role / Timing Role: Standalone parallel memory mapped at fixed address range using discrete CE/OE/WE decoding. Use Value: TTL-compatible I/Os eliminate level translators; 28-pin TSOP I fits compact PCB layouts without through-hole footprint. |
| Telecom Line Card Frame Buffer | Medical Instrument Data Logger |
|
Use Scenario: Temporary storage of packetized voice or signaling data in T1/E1 interface cards before DSP processing or serial transmission. IC Role / Device Role / Timing Role: High-speed buffer between FPGA-based framing logic and serial transceivers. Use Value: 15 ns access time matches typical FPGA I/O timing budgets; industrial temp rating supports convection-cooled chassis. |
Use Scenario: Cyclic data capture buffer in portable ECG or patient monitors where power loss may occur during battery swaps. IC Role / Device Role / Timing Role: Volatile frame store holding up to 32 KB of waveform samples prior to flash transfer. Use Value: 2.0V data retention maintains integrity during 100 ms battery switchover; low ISB2 extends backup battery life. |
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, 15 ns access, 3.3V only, 44-pin TSOP II | Requires data bus width adaptation; incompatible with 8-bit-only systems | Select only if migrating to 16-bit data path and redesigning address decoding |
| ON Semiconductor MCM6295DW15 | 32K × 8, 15 ns, 5V, 28-pin SOJ; higher ISB = 500 µA, no 2.0V retention | Lacks data retention below 4.5V; unsuitable for brown-out recovery use cases | Acceptable for cost-sensitive commercial-temp designs where power-down is software-managed |
Compared with IS61LV25616AL-15TQLI and MCM6295DW15, the CY7C199CL-15VXC uniquely combines 8-bit bus compatibility, industrial temperature support, 2.0V data retention, and ultra-low 10 µA standby-making it optimal for legacy 5V systems requiring robust power-fail resilience.
Availability
CY7C199CL-15VXC is available at Aetrix Electronics and suitable for industrial PLCs, legacy microcontroller data expansion, telecom line card buffers, and medical data loggers requiring stable component supply across extended product lifecycles.
Supply support for CY7C199CL-15VXC 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 solutions for industrial, automotive, and communications markets.
The CY7C199C series was designed specifically for cost-effective, high-reliability asynchronous SRAM replacement in 5V embedded systems requiring industrial-grade timing and power behavior without clocked interfaces.
FAQ
What is the maximum operating current for CY7C199CL-15VXC at 15 ns speed grade?
The maximum VCC operating supply current (ICC) is 80 mA under full-speed operation (f = 1/tRC), measured at VCC = 5.5V, IOUT = 0 mA, and ambient temperature of +85°C. This value reflects worst-case dynamic power during continuous read/write cycling and excludes transient peaks during address transitions.
Does CY7C199CL-15VXC support both TTL and CMOS input thresholds?
Yes - VIH is specified as 2.2V minimum and VIL as 0.8V maximum across all speed grades, meeting TTL input voltage thresholds. The device also accepts CMOS-compatible logic levels, with guaranteed switching at VCC – 0.3V (high) and 0.3V (low) for low-power interface modes.
Can CY7C199CL-15VXC be used in place of CY7C199C-15VXC?
Yes - the "L" suffix denotes industrial temperature qualification (–40°C to +85°C), while the base CY7C199C-15VXC is commercial grade (0°C to +70°C). All electrical specifications, pinout, and timing are identical; only temperature screening differs. No design changes are required for substitution.
What is the recommended decoupling for CY7C199CL-15VXC in TSOP I package?
A 100 nF X7R ceramic capacitor placed within 3 mm of VCC (pin 7) and VSS (pin 21), plus a 4.7 µF tantalum or polymer capacitor within 10 mm of the same pins, is specified in Cypress Application Note AN1089. This minimizes VCC sag during simultaneous I/O switching and meets tPD stability requirements.
CY7C199CL-15VXC 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
CY7C199CL-15VXC FAQ
1.How can I place an order for CY7C199CL-15VXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199CL-15VXC 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 CY7C199CL-15VXC reliable?
The price and inventory of CY7C199CL-15VXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199CL-15VXC is usually 5 days.
3.What payment methods are accepted for CY7C199CL-15VXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199CL-15VXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199CL-15VXC?
CY7C199CL-15VXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199CL-15VXC 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 CY7C199CL-15VXC?
For technical support, including CY7C199CL-15VXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199CL-15VXC requirements.
6.How does Aetrix verify that CY7C199CL-15VXC is sourced from the original manufacturer or authorized distributors?
All CY7C199CL-15VXC 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 CY7C199CL-15VXC meets industry standards.
7.What is the process for return or replacement of CY7C199CL-15VXC?
All CY7C199CL-15VXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199CL-15VXC, 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 CY7C199CL-15VXC part is unused and in its original packaging.
Return procedure for CY7C199CL-15VXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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