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Infineon Technologies CY7C199C-15VXC
- Part No.:
- CY7C199C-15VXC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C199C-15VXC.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:4,814
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Product details
Overview
CY7C199C-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/Os, and automatic CE-controlled power-down. It delivers low standby current (10 µA in CMOS mode), 2.0V data retention, and supports high-speed memory interfacing in embedded controllers and industrial instrumentation.
For engineers reviewing the CY7C199C-15VXC datasheet, CY7C199C-15VXC pinout, CY7C199C-15VXC application, or CY7C199C-15VXC equivalent, key selection criteria include access time consistency across temperature, CE-triggered power-down behavior, I/O capacitance (8 pF), output drive strength (–4 mA VOH / 8 mA VOL), and compatibility with legacy 5V bus architectures requiring 28-pin SOJ/DIP/TSOP I footprints.
Technical Context
The CY7C199C-15VXC 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 deasserted, reducing ICC to ≤10 µA under CMOS input conditions.
Timing is defined by overlapping control signals: write initiation requires concurrent CE and WE LOW, while read validity depends on tACE (15 ns max), tDOE (7 ns max), and tHZOE (7 ns max). All AC parameters are specified at VCC = 5.0V, TA = 0°C to 70°C, with 30 pF load and 3 ns input rise/fall times.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8 bits - supports byte-wide data bus without external demultiplexing |
| Access Time (tAA) | 15 ns max - ensures reliable read timing in 66 MHz CPU bus cycles |
| Supply Voltage | 4.5V to 5.5V - compatible with standard 5V logic rails and legacy industrial power supplies |
| Standby Current (ISB2) | 10 µA max - enables ultra-low-power hold mode during system sleep states |
| Data Retention Voltage | 2.0V min - preserves memory contents during brown-out or backup battery operation |
| I/O Capacitance | 8 pF - limits signal integrity degradation on long PCB traces at 20+ MHz toggle rates |
| Output Drive | –4 mA VOH / 8 mA VOL - meets TTL voltage thresholds while driving ≥10 LS-TTL loads |
Pinout & Package
Package: 28-pin SOJ (300-mil), lead-free compliant, body size 11.43 mm × 12.7 mm × 2.54 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus supporting full 32K-word addressing; no internal latching |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit tri-state data path; high-impedance when CE=HIGH or OE=HIGH |
| CE | Chip Enable | Primary device select; triggers automatic power-down when HIGH (CMOS mode) |
| OE | Output Enable | Controls output buffer only; does not affect power state or write capability |
| WE | Write Enable | Active-LOW write strobe; write occurs only when CE and WE both LOW |
| VCC | Power Supply | +5.0V core supply; decoupling required within 10 mm of pin 28 |
| VSS | Ground | Signal and power return; must be connected to low-impedance ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE Power-down | Reduces ICC to 10 µA without external control logic or sleep-mode registers |
| TTL-Compatible I/O | Eliminates level-shifting components when interfacing with 5V microcontrollers and FPGAs |
| 2.0V Data Retention | Maintains stored data during undervoltage events down to 2.0V, enabling graceful shutdown |
| Low Input Capacitance | 8 pF per pin minimizes loading on address/data buses, preserving signal edge rates |
| Multiple Package Options | SOJ, DIP, and TSOP I footprints allow drop-in replacement across legacy and space-constrained designs |
Applications
| Industrial PLC Memory Buffer | Legacy Embedded Controller Cache |
|---|---|
Use Scenario: Real-time I/O scanning in programmable logic controllers where deterministic memory access latency is critical. IC Role / Device Role / Timing Role: Asynchronous SRAM providing non-pipelined, cycle-accurate read/write for ladder logic execution buffers. Use Value: 15 ns tAA guarantees sub-20 ns response to interrupt-driven I/O updates without wait states. | Use Scenario: Instruction/data storage in 8051- or Z80-based medical monitoring devices operating in extended temperature ranges. IC Role / Device Role / Timing Role: Primary program/data RAM interfaced directly to microcontroller address/data bus with no glue logic. Use Value: 5.0V ±10% tolerance and –40°C to +85°C industrial grade rating ensure reliability in unregulated environments. |
| Automotive Body Control Module | Test Equipment Data Capture Buffer |
Use Scenario: Storing configuration tables and sensor calibration data in automotive BCMs with infrequent writes but frequent reads. IC Role / Device Role / Timing Role: Nonvolatile shadow RAM holding EEPROM-backed settings; powered continuously during vehicle sleep mode. Use Value: 2.0V data retention allows retention during battery disconnect or deep-sleep voltage sag below 3.0V. | Use Scenario: High-speed waveform capture in benchtop oscilloscopes and logic analyzers requiring burst-mode memory buffering. IC Role / Device Role / Timing Role: FIFO-like temporary storage for digitized samples before transfer to host processor or flash. Use Value: 8 pF I/O capacitance and 7 ns tHZOE support clean 20+ MHz sampling clock edges without signal distortion. |
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, 3.3V-only supply (3.0–3.6V), lower ISB (2 µA), no 5V tolerance | Requires level shifters or voltage translation in 5V systems; unsuitable for direct 5V bus replacement | Select only if migrating to 3.3V architecture and board redesign is feasible |
| IS61LV25616AL-15TQLI | 15 ns access, 3.3V supply, 256K × 16 organization, different pinout (44-pin TSOP II) | Provides double data width but incompatible footprint and address mapping; not pin-compatible | Choose only for new designs needing wider bus and accepting full layout revision |
Compared with AS6C4008-15TIN and IS61LV25616AL-15TQLI, the CY7C199C-15VXC uniquely retains full 5V TTL compatibility, SOJ/DIP/TSOP I package flexibility, and CE-triggered power-down without voltage translation-making it irreplaceable in legacy 5V embedded upgrades.
Availability
CY7C199C-15VXC is available at Aetrix Electronics and suitable for industrial PLCs, legacy embedded controller upgrades, automotive body control modules, and test equipment requiring stable component supply across extended lifecycles.
Supply support for CY7C199C-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 solutions for industrial, automotive, and consumer applications.
The CY7C199C belongs to Cypress's legacy asynchronous SRAM product line, designed specifically for drop-in replacement of obsolete 28-pin 5V SRAMs in cost-sensitive, long-lifecycle industrial and instrumentation systems.
FAQ
What is the maximum operating temperature range for CY7C199C-15VXC?
The CY7C199C-15VXC is rated for industrial operation from –40°C to +85°C. This range is validated per its DC and AC electrical specifications in the official datasheet (Document #: 38-05408 Rev. *C), with all timing parameters guaranteed across this full span when VCC is maintained at 4.5V–5.5V.
Does CY7C199C-15VXC support true 5V-tolerant I/Os?
Yes - all inputs (A0–A14, CE, OE, WE) accept voltages up to VCC + 0.5V (max 6.0V), and outputs drive to valid TTL HIGH/LOW levels (2.4V/0.4V) at VCC = 4.5V minimum. This satisfies full 5V system interoperability without external clamping or level shifting.
How does the automatic power-down feature activate?
Power-down engages automatically when CE is driven HIGH while inputs meet CMOS thresholds (VIN ≥ VCC – 0.3V or VIN ≤ 0.3V). In this state, ICC drops to ≤10 µA. No additional control signals or configuration registers are required - activation is purely hardware-determined by CE and input voltage levels.
Can CY7C199C-15VXC be used in place of CY7C199-15VXC?
Yes - the "C" suffix denotes the commercial-grade version (0°C to 70°C), while the non-C variant is obsolete. The CY7C199C-15VXC maintains identical pinout, timing, and electrical specs, with enhanced manufacturing controls and Pb-free compliance. It is the recommended replacement per Cypress's product change notices.
CY7C199C-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
CY7C199C-15VXC FAQ
1.How can I place an order for CY7C199C-15VXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199C-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 CY7C199C-15VXC reliable?
The price and inventory of CY7C199C-15VXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199C-15VXC is usually 5 days.
3.What payment methods are accepted for CY7C199C-15VXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199C-15VXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199C-15VXC?
CY7C199C-15VXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199C-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 CY7C199C-15VXC?
For technical support, including CY7C199C-15VXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199C-15VXC requirements.
6.How does Aetrix verify that CY7C199C-15VXC is sourced from the original manufacturer or authorized distributors?
All CY7C199C-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 CY7C199C-15VXC meets industry standards.
7.What is the process for return or replacement of CY7C199C-15VXC?
All CY7C199C-15VXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199C-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 CY7C199C-15VXC part is unused and in its original packaging.
Return procedure for CY7C199C-15VXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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