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Infineon Technologies CY7C199D-10VXI
- Part No.:
- CY7C199D-10VXI
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C199D-10VXI.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:984
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Product details
Overview
CY7C199D-10VXI from Infineon Technologies (formerly Cypress) is a 256-Kbit (32K × 8) high-speed CMOS static RAM with 10 ns access time, TTL-compatible I/O, and automatic CE-controlled power-down. It operates at 5 V ±0.5 V over –40 °C to +85 °C, draws 80 mA active current and 3 mA CMOS standby current, and supports data retention down to 2.0 V. It is used in legacy industrial control systems requiring fast, reliable parallel memory interfacing with microcontrollers such as Intel 80Cxx or Motorola 68xxx families.
For engineers reviewing the CY7C199D-10VXI datasheet, CY7C199D-10VXI pinout, CY7C199D-10VXI application, or CY7C199D-10VXI equivalent, key selection criteria include 10 ns tAA timing compliance, 28-pin SOJ/TSOP I package compatibility, TTL-level input thresholds (VIH ≥ 2.2 V), CE/OE/WE control logic sequencing, and 2.0 V data retention capability for low-power hold modes.
Technical Context
The CY7C199D-10VXI implements a fully asynchronous SRAM architecture with tri-state bidirectional I/Os (I/O0–I/O7), independent chip enable (CE), output enable (OE), and write enable (WE) controls. Its address space spans A0–A14 (15-bit), supporting 32,768 × 8-bit organization without internal refresh or clocking.
It features dual power-down modes: ISB1 (10 mA, TTL input thresholds) and ISB2 (3 mA, CMOS input thresholds), activated automatically when CE is HIGH. Data retention is guaranteed at VCC = 2.0 V with no external clock or control signals required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 256 Kbit (32K × 8), enabling direct byte-wide interface to 8-bit microprocessors without data bus multiplexing |
| Access time (tAA) | 10 ns max - supports 100 MHz read cycles in synchronous systems with proper setup/hold margins |
| VCC operating range | 5.0 V ± 0.5 V - compatible with standard TTL logic rails and legacy 5 V embedded platforms |
| Active supply current (ICC) | 80 mA max at 10 ns - defines thermal budget for dense memory arrays in industrial PCB layouts |
| CMOS standby current (ISB2) | 3 mA max - enables low-power hold mode during processor sleep without external power gating |
| Data retention voltage | 2.0 V min - allows battery-backed operation or brown-out survival without data loss |
| Input compatibility | TTL-level inputs (VIH ≥ 2.2 V, VIL ≤ 0.8 V) - ensures interoperability with 5 V microcontrollers lacking CMOS input thresholds |
Pinout & Package
Available in Pb-free 28-pin SOJ (300-mil wide) and 28-pin TSOP I packages. Pin functions are identical across both packages per datasheet Figures 1 and 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address inputs | 15-bit unidirectional address bus accepting full 32K-word decode; no internal latching |
| I/O0–I/O7 | Bidirectional data bus | Tri-state outputs during read; high-impedance when CE HIGH, OE HIGH, or WE LOW |
| CE | Chip enable (active LOW) | Primary device select; enables automatic ISB2 power-down when deasserted |
| OE | Output enable (active LOW) | Gates output drivers only; does not affect internal state or power mode |
| WE | Write enable (active LOW) | Controls write cycle initiation; overlaps with CE LOW to define write window |
| VCC, GND | Power supply terminals | Single 5 V supply; no separate I/O or core voltage rails required |
Key Features
| Feature | Design Value |
|---|---|
| 10 ns access time with 5 V supply | Enables direct interface to 100 MHz bus systems without wait states in burst-read configurations |
| Automatic CE-driven power-down | Reduces standby current to 3 mA without external control logic or software intervention |
| TTL-compatible inputs and outputs | Eliminates level-shifting requirements when interfacing with legacy 5 V microcontrollers and FPGAs |
| 2.0 V data retention | Permits use with coin-cell backup or low-voltage supervisors without volatile data loss during power interruption |
| Pin- and function-compatible with CY7C199C | Supports drop-in replacement in existing designs without layout or firmware changes |
Applications
| Industrial PLC Memory Buffer | Legacy Microcontroller Code Storage |
|---|---|
Use Scenario: Real-time I/O scanning in programmable logic controllers where deterministic memory access latency is critical. IC Role / Device Role / Timing Role: Parallel SRAM serving as fast scratchpad memory for ladder logic execution engine. Use Value: 10 ns tAA ensures sub-microsecond response to interrupt-driven I/O updates without CPU wait-state insertion. | Use Scenario: Storing boot code and runtime variables for 8-bit MCUs like Intel 8051 derivatives in factory automation HMIs. IC Role / Device Role / Timing Role: Non-refreshed, byte-accessible program/data memory mapped into MCU address space. Use Value: TTL compatibility eliminates need for bus transceivers; 2.0 V retention preserves configuration during brief AC mains dips. |
| Automotive Body Control Module | Test Equipment Firmware Cache |
Use Scenario: Storing calibration tables and sensor history logs in under-hood ECUs operating across –40 °C to +85 °C. IC Role / Device Role / Timing Role: Temperature-hardened SRAM providing nonvolatile parameter storage during ignition cycling. Use Value: Guaranteed operation at full spec over industrial temperature range avoids derating or thermal throttling. | Use Scenario: Caching FPGA configuration bitstreams and measurement lookup tables in automated test systems. IC Role / Device Role / Timing Role: High-reliability parallel memory enabling rapid reconfiguration between test sequences. Use Value: 28-pin SOJ package supports wave-soldering and long-term field reliability in production test fixtures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C4008-10TIN | 4 Mbit (512K × 8), 10 ns, 3.3 V only, CMOS inputs | Requires level shifters for 5 V TTL systems; higher density but incompatible voltage domain | Select only if migrating to 3.3 V architecture and needing >256 Kbit capacity |
| IS61LV25616AL-10TLI | 4 Mbit (256K × 16), 10 ns, 3.3 V, LVCMOS I/O | 16-bit bus width and 3.3 V operation necessitate PCB redesign and voltage translation | Choose for new 3.3 V designs requiring wider data path and higher density; not drop-in |
Compared with AS6C4008-10TIN and IS61LV25616AL-10TLI, CY7C199D-10VXI uniquely retains 5 V TTL compatibility, 28-pin SOJ/TSOP I footprint, and 2.0 V data retention-making it irreplaceable in legacy 5 V industrial systems where voltage translation or board revision is prohibited.
Availability
CY7C199D-10VXI is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, legacy microcontroller-based HMIs, and automated test equipment requiring stable component supply across extended product lifecycles.
Supply support for CY7C199D-10VXI 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
Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive ICs, and memory solutions formerly developed by Cypress Semiconductor.
CY7C199D belongs to Infineon's legacy parallel SRAM product line, designed specifically for pin-compatible migration paths in 5 V industrial and automotive systems requiring deterministic timing and long-term supply stability.
FAQ
Is CY7C199D-10VXI compatible with 3.3 V microcontrollers?
No. CY7C199D-10VXI requires 5 V ±0.5 V supply and has TTL-level inputs (VIH ≥ 2.2 V), making it incompatible with native 3.3 V logic without level-shifting circuitry. Its VOH minimum is 2.4 V at –4 mA, insufficient to drive 3.3 V CMOS inputs reliably.
What is the maximum clock frequency supported for read cycles?
The device is asynchronous and does not use a clock. Its 10 ns tRC (read cycle time) supports up to 100 MHz effective throughput when interfaced with processors capable of meeting setup/hold timing on CE, OE, and address lines-verified per AC switching characteristics in datasheet Rev. *N.
Does CY7C199D-10VXI require an external clock or refresh signal?
No. As a static RAM, it retains data indefinitely while powered and requires no clock, refresh controller, or periodic access. Data retention continues at 2.0 V VCC without any external signals-confirmed in Data Retention Characteristics table on page 6 of the datasheet.
Can CY7C199D-10VXI be used in place of CY7C199C?
Yes. The CY7C199D-10VXI is explicitly specified as pin- and function-compatible with CY7C199C per its datasheet Feature List and Selection Guide. No hardware or firmware changes are needed for substitution, though users should verify ambient temperature and timing margin requirements match their design.
CY7C199D-10VXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 28-BSOJ (0.300", 7.62mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 10ns
- Access Time:
- 10 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOJ
CY7C199D-10VXI FAQ
1.How can I place an order for CY7C199D-10VXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199D-10VXI 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 CY7C199D-10VXI reliable?
The price and inventory of CY7C199D-10VXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199D-10VXI is usually 5 days.
3.What payment methods are accepted for CY7C199D-10VXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199D-10VXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199D-10VXI?
CY7C199D-10VXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199D-10VXI 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 CY7C199D-10VXI?
For technical support, including CY7C199D-10VXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199D-10VXI requirements.
6.How does Aetrix verify that CY7C199D-10VXI is sourced from the original manufacturer or authorized distributors?
All CY7C199D-10VXI 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 CY7C199D-10VXI meets industry standards.
7.What is the process for return or replacement of CY7C199D-10VXI?
All CY7C199D-10VXI units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199D-10VXI, 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 CY7C199D-10VXI part is unused and in its original packaging.
Return procedure for CY7C199D-10VXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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