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Infineon Technologies CY7C199CNL-15VXCT
- Part No.:
- CY7C199CNL-15VXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C199CNL-15VXCT.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,704
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Product details
Overview
CY7C199CNL-15VXCT 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 serves as a non-volatile-capable fast memory buffer in microcontroller-based instrumentation systems requiring deterministic read/write timing.
For engineers reviewing the CY7C199CNL-15VXCT datasheet, CY7C199CNL-15VXCT pinout, CY7C199CNL-15VXCT application, or CY7C199CNL-15VXCT equivalent, key selection criteria include access time consistency across temperature, low standby current under CE deassertion, compatibility with legacy 5V bus interfaces, and TSOP I package suitability for space-constrained PCB layouts.
Technical Context
The CY7C199CNL-15VXCT implements a fully asynchronous SRAM architecture with independent address decoding, sense amplifier array, and tri-state I/O buffers controlled by CE, OE, and WE. Its power-down circuitry activates automatically when CE is high, reducing ICC to ≤10 µA at VCC = 5.5V and f = 0.
It supports two distinct write modes: WE-controlled (OE = VIH) and CE-controlled (OE = VIL), with guaranteed tPD of 15 ns and tHZCE/tHZOE of 7 ns. Data retention operates down to 2.0V with ICCDR ≤150 µA, enabling battery-backed hold functionality without external regulators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8 bits - provides byte-wide data interface compatible with 8-bit microcontrollers and legacy peripherals |
| Access Time (tAA) | 15 ns - ensures sub-67 MHz synchronous bus operation with margin for trace delays |
| Supply Voltage Range | 4.5V to 5.5V - supports industrial 5V rails with ±10% tolerance and brown-out resilience |
| Standby Current (ISB2) | 10 µA - enables ultra-low-power sleep states in portable instrumentation during idle periods |
| Data Retention Voltage | 2.0V - allows memory contents to persist during main supply interruption using backup coin cell or capacitor |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control environments |
| I/O Compatibility | TTL input thresholds / 4mA drive - interoperates directly with 74LS, 8051, and Z80 families without level shifters |
Pinout & Package
Package: 28-pin TSOP I (8 mm × 13.4 mm), lead-free, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus accepting full 32K address space; CMOS inputs with VIH ≥ 2.2V, VIL ≤ 0.8V |
| IO0–IO7 | Bidirectional Data I/O | 8-bit tri-state data bus; outputs disabled when OE or CE high; drives 4mA high/8mA low |
| CE | Chip Enable | Primary device select; asserts internal power-down when high, enabling <10 µA ISB2 mode |
| OE | Output Enable | Controls output buffer state independently of CE; allows read-only gating without deselecting chip |
| WE | Write Enable | Active-low write strobe; initiates write cycle when CE low; defines tPWE = 9 ns minimum pulse width |
| VCC | Power Supply | +5.0V ±10% core supply; decoupling required within 10 mm of pin 7 per layout guidelines |
| VSS | Ground | Reference return path for all signals; connected to pin 21 in TSOP I; requires low-inductance plane |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE Power Down | Reduces ICC to ≤10 µA when CE = VIH, eliminating need for external power-gating logic |
| 2.0V Data Retention | Maintains stored data during main supply loss, enabling seamless resume after brown-out recovery |
| 15 ns Access with Full Temp Range | Guaranteed tAA ≤15 ns over –40°C to +85°C, supporting real-time control loop buffering |
| TTL-Compatible I/O | Direct interface to legacy 5V logic families without translation, reducing BOM count and layout complexity |
| Low Capacitance Inputs | CIN = 8 pF max minimizes loading on address/data buses, preserving signal integrity at 67 MHz |
Applications
| Industrial PLC I/O Buffering | Automotive Engine Control Unit Memory |
|---|---|
Use Scenario: Storing real-time sensor sampling buffers and actuator command queues in programmable logic controllers with deterministic scan cycles. IC Role / Device Role / Timing Role: Asynchronous SRAM providing zero-wait-state read/write access for dual-port-like behavior via CE/OE/WE arbitration. Use Value: 15 ns tAA and tRC enable 67 MHz burst reads, meeting 100 µs scan cycle deadlines without DMA overhead. | Use Scenario: Holding calibration tables and transient fault logs in engine control units where power interruption may occur during cranking. IC Role / Device Role / Timing Role: Non-volatile-capable memory retaining critical data during VCC dip to 2.0V, supported by built-in retention circuitry. Use Value: Eliminates external backup battery or supercapacitor, reducing cost and board area while maintaining ASIL-B data integrity. |
| Medical Infusion Pump Controller | Legacy Industrial HMI Display Cache |
Use Scenario: Caching waveform display data and dosage history in battery-powered infusion pumps requiring fail-safe memory persistence. IC Role / Device Role / Timing Role: Low-power SRAM operating in ISB2 mode (<10 µA) during standby, activated only during UI updates or alarm events. Use Value: Extends single-cell Li-ion battery life beyond 72 hours between charges while guaranteeing data retention during power-off. | Use Scenario: Serving as frame buffer for monochrome LCD displays in factory HMIs using aging 8-bit microcontrollers with parallel bus interfaces. IC Role / Device Role / Timing Role: Byte-wide 32K × 8 memory mapped directly to MCU address space, accessed via standard MOVX instructions. Use Value: TTL-compatible I/O and 5V operation eliminate level-shifting components, simplifying redesign of legacy 1990s-era control panels. |
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 | 15 ns access, 32K × 8, but uses 3.3V core (VCC = 3.3V ±10%) and LVTTL I/O | Requires level translation for 5V systems; unsuitable for direct replacement in legacy 5V designs | Select only if migrating to 3.3V architecture and redesigning power delivery and I/O buffers |
| IS61LV25616AL-15TQLI | 15 ns access, 256K × 16 organization, 3.3V supply, LVCMOS I/O, 44-pin TSOP II | Doubles data width but doubles address lines; incompatible pinout and voltage domain | Choose for bandwidth-critical upgrades where 16-bit data path and higher density justify PCB redesign |
Compared with AS6C4008-15TIN and IS61LV25616AL-15TQLI, the CY7C199CNL-15VXCT uniquely retains full 5V TTL compatibility, TSOP I footprint, and 2.0V data retention-making it irreplaceable in cost-sensitive, drop-in 5V industrial retrofits without voltage or layout changes.
Availability
CY7C199CNL-15VXCT is available at Aetrix Electronics and suitable for industrial PLC I/O buffering, automotive ECU calibration storage, and medical infusion pump controller memory requiring stable component supply across extended product lifecycles.
Supply support for CY7C199CNL-15VXCT 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 consumer applications.
The CY7C199CN series targets cost-effective, pin-compatible SRAM replacements for legacy 5V systems, emphasizing backward compatibility, wide temperature operation, and minimal system-level redesign effort.
FAQ
What is the maximum clock frequency supported by CY7C199CNL-15VXCT?
The CY7C199CNL-15VXCT is an asynchronous SRAM and does not use a clock signal. Its maximum operational speed is defined by access time (tAA = 15 ns) and cycle time (tRC = 15 ns), supporting effective bus rates up to 67 MHz in burst-read configurations. Timing depends solely on CE, OE, and WE edge alignment-not a system clock.
Can CY7C199CNL-15VXCT operate with a 3.3V supply?
No. The CY7C199CNL-15VXCT is specified only for 5.0V ±10% (4.5V to 5.5V). Operation below 4.5V violates DC specifications: VIH drops below 2.2V, VOH falls below 2.4V, and data retention fails below 2.0V. Using 3.3V will result in undefined behavior, read failures, and potential latch-up.
How does the automatic power-down feature function?
When CE is driven high (≥VCC – 0.3V), the internal power-down circuit disables the array and I/O drivers, reducing ICC to ≤10 µA (ISB2) at VCC = 5.5V. This occurs regardless of OE or WE state and requires no external control logic-only CE assertion is needed to enter ultra-low-power mode.
Is CY7C199CNL-15VXCT RoHS compliant and lead-free?
Yes. The "L" suffix in CY7C199CNL-15VXCT denotes lead-free packaging. It complies with RoHS Directive 2011/65/EU and uses matte tin (Sn) terminations on its 28-pin TSOP I body. The device meets JEDEC J-STD-020D moisture sensitivity level 3 and is compatible with standard Pb-free reflow profiles.
CY7C199CNL-15VXCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 28-BSOJ (0.300", 7.62mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
CY7C199CNL-15VXCT FAQ
1.How can I place an order for CY7C199CNL-15VXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199CNL-15VXCT 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 CY7C199CNL-15VXCT reliable?
The price and inventory of CY7C199CNL-15VXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199CNL-15VXCT is usually 5 days.
3.What payment methods are accepted for CY7C199CNL-15VXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199CNL-15VXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199CNL-15VXCT?
CY7C199CNL-15VXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199CNL-15VXCT 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 CY7C199CNL-15VXCT?
For technical support, including CY7C199CNL-15VXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199CNL-15VXCT requirements.
6.How does Aetrix verify that CY7C199CNL-15VXCT is sourced from the original manufacturer or authorized distributors?
All CY7C199CNL-15VXCT 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 CY7C199CNL-15VXCT meets industry standards.
7.What is the process for return or replacement of CY7C199CNL-15VXCT?
All CY7C199CNL-15VXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199CNL-15VXCT, 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 CY7C199CNL-15VXCT part is unused and in its original packaging.
Return procedure for CY7C199CNL-15VXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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