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Infineon Technologies CY7C199CN-15VXC
- Part No.:
- CY7C199CN-15VXC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C199CN-15VXC.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,083
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Product details
Overview
CY7C199CN-15VXC 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/O, and automatic CE-controlled power-down mode. It delivers 80 mA active current and 500 µA CMOS standby current in a Pb-free 28-pin TSOP I package, used in legacy industrial controllers requiring nonvolatile data retention at 2.0V.
For engineers reviewing the CY7C199CN-15VXC datasheet, CY7C199CN-15VXC pinout, CY7C199CN-15VXC application, or CY7C199CN-15VXC equivalent, key selection criteria include access timing consistency across temperature, low-power deselected state behavior, data retention voltage margin, and compatibility with 5V TTL bus interfaces in space-constrained PCB layouts.
Technical Context
The CY7C199CN-15VXC implements a fully asynchronous memory interface with independent chip enable (CE), output enable (OE), and write enable (WE) controls. Its internal architecture includes row/column decoders, sense amplifiers, and an automated power-down circuit triggered by CE high, reducing ICC to ≤500 µA without external control logic.
It supports dual read/write modes: OE-controlled reads (with WE high) and CE- or WE-controlled writes (with OE high). Timing parameters are guaranteed over commercial (0°C to 70°C) and industrial (–40°C to 85°C) ranges, with tRC = 15 ns, tAA = 15 ns, and tPD = 15 ns - all specified at VCC = 4.5V–5.5V and load conditions per JEDEC standard AC test setup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8 bits - provides byte-wide data bus interface compatible with 8-bit microcontrollers and legacy peripherals. |
| Access Time (tAA) | 15 ns - ensures reliable read response within tight timing budgets of 5V CPU buses operating up to ~66 MHz. |
| VCC Operating Range | 4.5V to 5.5V - supports stable operation across noisy 5V rail environments without regulation overhead. |
| Standby Current (ISB2) | 500 µA at VCC = 5.5V - enables low-power hold mode during system sleep without external power gating. |
| Data Retention Voltage | 2.0V minimum - guarantees SRAM contents survive brown-out events down to 2.0V before backup battery takeover. |
| Package Type | 28-pin TSOP I (8 × 13.4 mm) - surface-mount footprint optimized for high-density industrial PCBs with reflow compatibility. |
| Input/Output Compatibility | TTL-level inputs and outputs - eliminates need for level-shifting when interfacing with 5V logic families. |
Pinout & Package
Package: 28-pin Thin Small Outline Package (TSOP I), 8 mm × 13.4 mm body, 0.55 mm lead pitch, Pb-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus accepting 32K unique locations; driven synchronously with CE/WE/OE for full random access. |
| IO0–IO7 | Bidirectional Data Bus | 8-bit parallel data path; tri-stated when OE = high or CE = high, enabling shared bus topology. |
| CE | Chip Enable | Active-low master select; forces device into automatic power-down (ISB ≤ 500 µA) when high. |
| OE | Output Enable | Active-low control for read data output; high-Z when high, even if CE is asserted. |
| WE | Write Enable | Active-low signal initiating write cycle; latches data on IOx when CE and WE both low. |
| VCC | Power Supply | +5.0V ±10% core supply; decoupling required within 10 mm of Pin 7 per layout guidelines. |
| VSS | Ground | Signal and power return reference; connected to Pin 21 for low-inductance grounding in TSOP I layout. |
Key Features
| Feature | Design Value |
|---|---|
| Automated Power Down | CE-driven transition to ≤500 µA standby without external sequencing - simplifies low-power system design. |
| 2.0V Data Retention | Maintains stored data at VCC ≥ 2.0V - extends functional uptime during undervoltage transients in industrial power systems. |
| TTL-Compatible I/O | VIH = 2.2V min, VOL = 0.4V max - interoperates directly with 5V microcontrollers, FPGAs, and ASICs without translators. |
| Multiple Package Options | TSOP I, SOJ, and DIP variants - supports migration from through-hole prototyping to volume SMT production. |
| JEDEC-Compliant Timing | tRC = 15 ns, tPD = 15 ns, tHZOE = 7 ns - meets industry-standard asynchronous SRAM timing margins for robust bus timing closure. |
Applications
| Industrial PLC Memory Buffer | Legacy Medical Device Data Cache |
|---|---|
|
Use Scenario: Real-time I/O scan buffer in programmable logic controllers handling analog input sampling and digital output updates every 10 ms. IC Role / Device Role / Timing Role: Asynchronous SRAM providing zero-wait-state read/write access to 32K-byte process image memory mapped to 8-bit CPU bus. Use Value: 15 ns tAA ensures deterministic response to CPU address strobes, while 500 µA ISB reduces thermal load during idle scan cycles. |
Use Scenario: Temporary waveform storage in portable ECG monitors capturing 12-lead analog data at 1 kHz before USB upload. IC Role / Device Role / Timing Role: Byte-accessible memory holding 32K samples prior to compression and transfer; retains data during brief battery switchover. Use Value: 2.0V data retention sustains integrity during 50-ms power gap between primary and backup cells, preventing loss of diagnostic traces. |
| Avionics Display Frame Buffer | Point-of-Sale Terminal Transaction Log |
|
Use Scenario: Frame buffer for monochrome cockpit display updating at 30 Hz in certified airborne equipment with strict EMI constraints. IC Role / Device Role / Timing Role: Non-cached SRAM storing 32K-pixel bitmap; accessed via dedicated video controller with burstless asynchronous reads. Use Value: TSOP I package minimizes board area and radiated emissions; TTL I/O avoids noise-generating level shifters near sensitive RF sections. |
Use Scenario: Local transaction journaling in retail terminals processing credit card swipes and receipt generation offline. IC Role / Device Role / Timing Role: Write-through cache buffering sales records until Ethernet/WiFi connection resumes; survives AC mains dropout. Use Value: Automatic CE power-down cuts standby current to 500 µA during network outage, extending battery-backed runtime by >4× vs. standard SRAM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar asynchronous SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C4008-15TIN | 4 Mbit (512K × 8), 15 ns, 3.3V only, no 2.0V retention | Requires level translation for 5V systems; unsuitable for brown-out retention use cases | Select only if migrating to 3.3V architecture and higher density is needed. |
| IS61LV25616AL-15TQLI | 4 Mbit (256K × 16), 15 ns, 3.3V, 16-bit bus, 2.0V retention supported | Wider data bus increases PCB routing complexity; incompatible with 8-bit legacy controllers | Choose only for new 16-bit designs where bus width and voltage match system architecture. |
Compared with AS6C4008-15TIN and IS61LV25616AL-15TQLI, the CY7C199CN-15VXC uniquely satisfies 5V TTL compatibility, 8-bit bus alignment, and guaranteed 2.0V data retention - making it irreplaceable in legacy industrial and medical 5V systems requiring drop-in SRAM replacement.
Availability
CY7C199CN-15VXC is available at Aetrix Electronics and suitable for industrial PLC memory buffers, legacy medical device data caches, avionics display frame buffers, and point-of-sale terminal transaction logs requiring stable component supply across extended product lifecycles.
Supply support for CY7C199CN-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) designs high-reliability memory and programmable solutions for industrial, automotive, and communications systems, with emphasis on long-lifecycle support and qualification rigor.
The CY7C199CN belongs to Cypress's legacy asynchronous SRAM product line, engineered specifically for 5V embedded systems needing deterministic timing, low-power deselected states, and seamless integration with TTL-based microcontrollers and peripheral ICs.
FAQ
Is CY7C199CN-15VXC RoHS-compliant and Pb-free?
Yes. The "VXC" suffix denotes a Pb-free, RoHS-compliant 28-pin TSOP I package, verified per Cypress Document #001-06435 Rev. *B. Lead finish is matte tin, and the device meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) for standard reflow profiles.
Does CY7C199CN-15VXC support battery backup operation?
Yes. It maintains data integrity at VCC ≥ 2.0V with ICCDR ≤ 150 µA, enabling direct connection to a backup lithium coin cell or supercapacitor without external regulators or switches - confirmed in the Data Retention Characteristics table on page 7 of the datasheet.
What is the maximum clock frequency this SRAM can support in practice?
While asynchronous, its 15 ns access time supports effective bus rates up to 66 MHz in systems with zero wait-state controllers. Real-world throughput depends on CE/OE/WE assertion timing; the tRC = 15 ns minimum cycle time allows sustained 66.7 MHz read/write bursts when controlled by FPGA or ASIC with precise strobe alignment.
Can CY7C199CN-15VXC be used in automotive applications?
Yes - the "CY7C199CN" base part is qualified for Automotive-A grade (–40°C to +125°C junction), but the -15VXC variant is specified only for commercial (0°C to 70°C) and industrial (–40°C to +85°C) temperature ranges per the Operating Range table on page 4. Automotive use requires validation of board-level thermal design and derating.
CY7C199CN-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
CY7C199CN-15VXC FAQ
1.How can I place an order for CY7C199CN-15VXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199CN-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 CY7C199CN-15VXC reliable?
The price and inventory of CY7C199CN-15VXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199CN-15VXC is usually 5 days.
3.What payment methods are accepted for CY7C199CN-15VXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199CN-15VXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199CN-15VXC?
CY7C199CN-15VXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199CN-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 CY7C199CN-15VXC?
For technical support, including CY7C199CN-15VXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199CN-15VXC requirements.
6.How does Aetrix verify that CY7C199CN-15VXC is sourced from the original manufacturer or authorized distributors?
All CY7C199CN-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 CY7C199CN-15VXC meets industry standards.
7.What is the process for return or replacement of CY7C199CN-15VXC?
All CY7C199CN-15VXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199CN-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 CY7C199CN-15VXC part is unused and in its original packaging.
Return procedure for CY7C199CN-15VXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C199CN-15VXC Tags
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