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Infineon Technologies CY7C199C-20VXC
- Part No.:
- CY7C199C-20VXC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C199C-20VXC.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,038
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Product details
Overview
CY7C199C-20VXC from Cypress Semiconductor is a 256K-bit (32K × 8) asynchronous CMOS static RAM with 20 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), supporting memory buffering in legacy microcontroller systems.
For engineers reviewing the CY7C199C-20VXC datasheet, CY7C199C-20VXC pinout, CY7C199C-20VXC application, or CY7C199C-20VXC equivalent, key selection criteria include access timing consistency across voltage variation, low standby current (500 µA), CE-driven power management, and compatibility with 5V bus architectures requiring non-volatile data hold at reduced VCC.
Technical Context
The CY7C199C-20VXC implements a fully asynchronous SRAM interface with independent CE, OE, and WE controls enabling flexible read/write sequencing. Its internal architecture includes address decoding logic, sense amplifiers, and an automated power-down circuit triggered when CE remains high, reducing ICC to 500 µA without external control signals.
All timing parameters-including tRC (20 ns), tAA (20 ns), tACE (20 ns), and tHZCE (9 ns)-are specified under industrial temperature and full VCC range (4.5V–5.5V). Data retention is guaranteed at VCC = 2.0V with tCDR = 0 ns and tR = 200 µs recovery, confirming true low-voltage hold capability without refresh.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256 Kbit (32K × 8) - supports byte-wide data bus interfacing without multiplexing |
| Access Time | 20 ns - guarantees deterministic read latency for 50 MHz bus cycles in real-time control loops |
| Supply Voltage | 4.5V to 5.5V - compatible with legacy 5V TTL/CMOS logic families without level shifting |
| Standby Current | 500 µA - enables low-power hold mode during processor sleep without external gating |
| Data Retention VCC | 2.0V - maintains stored data during brown-out or backup battery operation |
| Operating Temp | –40°C to +85°C - qualified for industrial motor drives and instrumentation environments |
| Package | 28-pin TSOP I (Z28, 8 mm × 13.4 mm) - surface-mount compatible with high-density PCB layouts |
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 accepting 32K unique locations; no internal latching - requires stable address during CE/OE assertion |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit TTL-compatible data path; high-impedance when OE = VIH or CE = VIH, enabling bus sharing |
| CE | Chip Enable | Active-low device select; initiates automatic power-down when high, reducing ICC to 500 µA |
| OE | Output Enable | Active-low read control; output enters high-Z state within 9 ns of OE deassertion (tHZOE) |
| WE | Write Enable | Active-low write strobe; write cycle completes in 20 ns (tWC); overlaps with CE for write initiation |
| VCC | Power Supply | +5.0V ±10% core supply; powers all logic and memory array; decoupling required per datasheet layout guidelines |
| VSS | Ground | Reference return for all signals and power; dedicated pin (Pin 21) minimizes ground bounce in high-speed access |
Key Features
| Feature | Design Value |
|---|---|
| 20 ns Access Time | Guaranteed read latency at full industrial temperature and voltage range-enables direct interfacing with 50 MHz microcontrollers |
| Automatic CE Power-down | Reduces ICC to 500 µA without software intervention or external circuitry-ideal for intermittent-access embedded systems |
| 2.0V Data Retention | Maintains valid memory contents during undervoltage events down to 2.0V-supports battery-backed hold without external supervisor ICs |
| TTL-Compatible I/Os | Accepts standard 5V TTL input thresholds (VIH ≥ 2.2V, VIL ≤ 0.8V) and drives 4 mA high / 8 mA low-eliminates level translators |
| Three Package Options | Available in 28-pin DIP, SOJ, and TSOP I-enables drop-in replacement across prototyping (DIP), legacy repair (SOJ), and production (TSOP I) |
Applications
| Industrial PLC Memory Buffer | Legacy Microcontroller Data RAM |
|---|---|
|
Use Scenario: Real-time I/O scanning in programmable logic controllers where deterministic memory access prevents scan-time jitter. IC Role / Device Role / Timing Role: Asynchronous byte-wide SRAM providing zero-wait-state data storage for register-mapped peripheral buffers. Use Value: 20 ns tAA ensures consistent 50 MHz bus timing across temperature; CE power-down cuts background current during idle scan phases. |
Use Scenario: External data RAM expansion for 8-bit MCUs (e.g., 8051, PIC18) in medical sensor concentrators with limited on-chip RAM. IC Role / Device Role / Timing Role: Non-multiplexed parallel memory interface supporting MOVX-style read/write with single-cycle addressing. Use Value: TTL-compatible I/Os eliminate level shifters; 2.0V retention preserves calibration data during brief power loss. |
| Automotive Instrument Cluster Display Cache | Point-of-Sale Terminal Transaction Log |
|
Use Scenario: Storing dynamic display frame buffers in analog-dial instrument clusters where EMI resilience and thermal stability are critical. IC Role / Device Role / Timing Role: High-reliability SRAM holding rendered UI segments between MCU updates; operates continuously at 85°C ambient. Use Value: Industrial temp rating (–40°C to +85°C) and 88.6°C/W ΘJA ensure safe junction temperature; low ICC reduces thermal load. |
Use Scenario: Local transaction logging in offline-capable retail terminals where data integrity must survive AC dropout or battery swap. IC Role / Device Role / Timing Role: Write-critical buffer storing encrypted receipt headers before flash commit; powered by backup capacitor. Use Value: 2.0V data retention allows >100 ms hold time on 100 µF cap; tWC = 20 ns enables fast log entry during high-throughput sales bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar asynchronous SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV25616AL-10TLI | 32K × 16 organization, 10 ns access, 3.3V only, LVTTL I/O | Requires bus width adaptation (16-bit vs. 8-bit) and 3.3V system redesign | Select only if migrating to 3.3V architecture and needing wider data path; not pin-compatible |
| AS6C4008-20ZIN | 512K × 8, 20 ns, 5.0V ±10%, same TSOP I package but 32-pin | Higher density but incompatible pin count and layout; no CE power-down feature | Use for capacity upgrade only after board revision; retains 5V compatibility but loses automatic low-power mode |
Compared with IS61LV25616AL-10TLI and AS6C4008-20ZIN, the CY7C199C-20VXC uniquely combines 5V tolerance, CE-triggered 500 µA standby, and 28-pin TSOP I footprint-making it irreplaceable in cost-sensitive, thermally constrained 5V designs requiring proven industrial qualification.
Availability
CY7C199C-20VXC is available at Aetrix Electronics and suitable for industrial PLC memory buffering, legacy microcontroller data RAM expansion, automotive instrument cluster display caching, and point-of-sale terminal transaction logging requiring stable component supply across extended lifecycle programs.
Supply support for CY7C199C-20VXC 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, PSoC, and USB solutions for industrial, automotive, and consumer applications.
The CY7C199C belongs to Cypress's legacy asynchronous SRAM product line, designed specifically for 5V systems requiring reliable, low-latency, pin-compatible memory upgrades in space-constrained industrial and automotive control units.
FAQ
Is CY7C199C-20VXC RoHS-compliant?
Yes. The CY7C199C-20VXC is manufactured in Cypress's lead-free TSOP I package (Z28) and complies with RoHS Directive 2011/65/EU. Lead-free marking is indicated by the "-LF" suffix in ordering codes; this variant carries full exemption documentation per JEDEC J-STD-609.
Can CY7C199C-20VXC operate at 4.0V?
No. The absolute minimum VCC is 4.5V per Maximum Ratings (Document #38-05408 Rev. *B, Page 4). Operation below 4.5V risks data corruption, timing violation, or failure to retain data-even at 2.0V retention mode, VCC must be ≥4.5V during active read/write cycles.
What is the maximum clock frequency supported for burst reads?
The CY7C199C-20VXC is asynchronous and has no clock input. Its maximum effective throughput is determined by tRC = 20 ns, yielding a theoretical maximum cycle rate of 50 MHz. Sustained burst reads require address setup/hold compliance per tSA/tHA (both 0 ns), meaning address changes must be complete before CE or OE assertion.
Does CY7C199C-20VXC support battery backup without external circuitry?
Yes-when VCC drops to 2.0V, the device automatically enters data retention mode with ICCDR ≤150 mA and no external control needed. However, a backup power source (e.g., coin cell or supercapacitor) and diode-OR circuit must be externally implemented to switch to the backup rail during main supply failure.
CY7C199C-20VXC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 28-BSOJ (0.300", 7.62mm Width)
- Packaging:
- Bag
- 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:
- 20ns
- Access Time:
- 20 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-20VXC FAQ
1.How can I place an order for CY7C199C-20VXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199C-20VXC 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-20VXC reliable?
The price and inventory of CY7C199C-20VXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199C-20VXC is usually 5 days.
3.What payment methods are accepted for CY7C199C-20VXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199C-20VXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199C-20VXC?
CY7C199C-20VXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199C-20VXC 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-20VXC?
For technical support, including CY7C199C-20VXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199C-20VXC requirements.
6.How does Aetrix verify that CY7C199C-20VXC is sourced from the original manufacturer or authorized distributors?
All CY7C199C-20VXC 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-20VXC meets industry standards.
7.What is the process for return or replacement of CY7C199C-20VXC?
All CY7C199C-20VXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199C-20VXC, 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-20VXC part is unused and in its original packaging.
Return procedure for CY7C199C-20VXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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