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Infineon Technologies CY7C199-15VC
- Part No.:
- CY7C199-15VC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C199-15VC.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,857
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Product details
Overview
CY7C199-15VC from Cypress Semiconductor is a 32K × 8 (262,144-bit) CMOS static RAM with 15 ns maximum access time, TTL-compatible I/O, and automatic CE-controlled power-down reducing standby current to 0.05 mA (L version). It operates at 5V ±10% over commercial (0°C to +70°C) and industrial (–40°C to +85°C) temperature ranges and is used in legacy microcontroller systems requiring fast, low-power parallel memory interfacing.
For engineers reviewing the CY7C199-15VC datasheet, CY7C199-15VC pinout, CY7C199-15VC application, or CY7C199-15VC equivalent, key selection criteria include tAA = 15 ns read timing, ISB2 = 0.05 mA CMOS standby current, CE/OE/WE three-control logic interface, and compatibility with 28-pin DIP/SOJ/LCC footprints in embedded control and instrumentation designs.
Technical Context
The CY7C199-15VC implements a full asynchronous SRAM architecture with independent Chip Enable (CE), Output Enable (OE), and Write Enable (WE) controls enabling flexible bus arbitration and memory expansion. Its 15 ns tAA and tRC specify guaranteed data validity after address or CE assertion under 5V operation and 30 pF load.
It features automatic power-down when CE is deasserted (ISB2 ≤ 0.05 mA), TTL-compatible input thresholds (VIH = 2.2 V, VIL = 0.8 V), and output drive capability of IOH = –4.0 mA / IOL = 8.0 mA - supporting direct connection to legacy 5V microprocessor buses without level translation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32,768 × 8 bits - provides 256 KB address space for byte-wide 8-bit microcontrollers. |
| Access Time (tAA) | 15 ns max - ensures reliable read setup for 66 MHz CPU bus cycles with margin. |
| Supply Voltage | 5.0 V ±10% - compatible with standard TTL/CMOS logic rails; no separate VDD/VSS sequencing required. |
| Standby Current (ISB2) | 0.05 mA max (CMOS inputs) - enables ultra-low-power hold mode during processor sleep states. |
| Operating Temperature | –40°C to +85°C (industrial grade) - supports deployment in industrial PLCs and automotive body controllers. |
| I/O Drive Strength | IOH = –4.0 mA, IOL = 8.0 mA - directly drives 10 TTL loads or 20 CMOS inputs without buffers. |
| Data Retention Voltage | 2.0 V (L version only) - maintains stored data during brown-out conditions down to 2V supply. |
Pinout & Package
Available in 28-pin plastic DIP (300-mil), SOJ, and LCC packages. Pin functions are identical across all variants; pin numbering follows JEDEC MS-012 (DIP/SOJ) and MO-047 (LCC) standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus (32K words); latched on CE/WE transitions; no internal address register. |
| I/O0–I/O7 | Bidirectional Data Bus | Three-state CMOS I/O pins; high-impedance when CE HIGH or OE HIGH and WE HIGH. |
| CE | Chip Enable (active LOW) | Primary chip select; enables internal logic and initiates automatic power-down when HIGH. |
| OE | Output Enable (active LOW) | Controls output drivers only; does not affect internal power state or write functionality. |
| WE | Write Enable (active LOW) | Controls direction of I/O pins: LOW = write, HIGH = read (when CE and OE active). |
| VCC | Power Supply | +5V supply pin (Pin 28 in DIP/SOJ, Pin 26 in LCC); decoupling capacitor required within 1 cm. |
| GND | Ground Reference | Signal and power ground (Pin 14 in DIP/SOJ, Pin 13 in LCC); must be low-inductance connection. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE Power-Down | Reduces ICC to 0.05 mA when CE is HIGH - eliminates need for external power-gating circuitry. |
| TTL-Compatible Interface | VIH = 2.2 V, VIL = 0.8 V - interoperable with 5V microcontrollers (e.g., 8051, Z80, 68000) without level shifters. |
| Fast tDOE = 7 ns | Enables rapid read bursts by minimizing OE-to-data delay - critical for video frame buffer and FIFO applications. |
| Three-State Outputs | High-impedance I/O0–I/O7 when CE or OE inactive - allows direct bus sharing with multiple peripherals. |
| DIE Coat for Alpha Immunity | Enhanced soft-error rate (SER) resilience in radiation-prone environments like medical imaging systems. |
Applications
| Industrial PLC Memory Buffer | Legacy Microcontroller Code/Data RAM |
|---|---|
|
Use Scenario: Real-time I/O scanning in programmable logic controllers where deterministic memory access latency is required for cycle-based scan execution. IC Role / Device Role / Timing Role: Parallel-accessed SRAM providing non-volatile code storage and working memory for ladder logic execution engine. Use Value: 15 ns tAA guarantees sub-20 ns memory response within 10 ms PLC scan cycles, eliminating wait-state insertion on 8-bit bus interfaces. |
Use Scenario: External program/data memory for 8-bit microcontrollers (e.g., Intel 8031, Motorola 6805) in cost-sensitive consumer electronics. IC Role / Device Role / Timing Role: Byte-wide static RAM mapped into external memory space via multiplexed address/data bus and control signals. Use Value: CE/OE/WE tri-control logic enables seamless integration with standard 8080-style bus timing, avoiding custom glue logic. |
| Automotive Body Control Module | Test Equipment Data Acquisition Buffer |
|
Use Scenario: Storing calibration tables and runtime variables in automotive body control units operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Industrial-grade SRAM retaining configuration data during ignition cycling and battery voltage dips. Use Value: 2.0 V data retention (L version) preserves memory contents during 3–5 V brown-out events common in vehicle electrical systems. |
Use Scenario: High-speed waveform capture buffer in benchtop oscilloscopes and logic analyzers requiring burst-mode memory reads. IC Role / Device Role / Timing Role: Fast-access parallel RAM serving as first-stage acquisition memory before DMA transfer to host controller. Use Value: tDOE = 7 ns and tHZOE = 7 ns enable >10 Msample/s sustained read throughput using simple address counter and OE strobing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C4008-15TIN | 4M × 8 organization, 15 ns access, 3.3 V only, no 2V data retention | Requires level-shifting for 5V systems; unsuitable for brown-out retention use cases | Select if migrating to 3.3 V design and higher density is needed; verify bus timing margins. |
| IS61LV25616AL-15TQLI | 256K × 16 organization, 15 ns, 3.3 V, LVCMOS I/O, no CE power-down | Wider data bus (16-bit), incompatible pinout, lacks automatic standby current reduction | Choose for 16-bit processors needing higher bandwidth; add external power management for low-power modes. |
Compared with AS6C4008-15TIN and IS61LV25616AL-15TQLI, the CY7C199-15VC uniquely delivers 5V operation, 2V data retention, and hardware CE-triggered power-down in a pin-compatible 28-pin footprint - making it irreplaceable in legacy 5V industrial and automotive systems requiring proven reliability and minimal redesign.
Availability
CY7C199-15VC is available at Aetrix Electronics and suitable for industrial PLCs, legacy microcontroller systems, automotive body control modules, and test equipment requiring stable component supply and long-term obsolescence support.
Supply support for CY7C199-15VC 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 logic solutions for industrial, automotive, and communications markets.
The CY7C199 belongs to Cypress's legacy parallel SRAM product line, designed specifically for drop-in replacement of bipolar and early CMOS memories in 5V embedded systems requiring speed, low power, and industrial temperature range.
FAQ
Is CY7C199-15VC RoHS compliant?
No - CY7C199-15VC was manufactured prior to RoHS Directive 2002/95/EC implementation and contains leaded solder in its package. It is exempt under Annex III for "industrial monitoring and control instruments" and remains available for legacy repair and long-lifecycle programs under controlled sourcing.
What is the difference between CY7C199-15VC and CY7C199-15VCT?
CY7C199-15VC denotes the commercial temperature grade (0°C to +70°C), while CY7C199-15VCT specifies the industrial grade (–40°C to +85°C). Both share identical timing (15 ns), pinout, and electrical specs except for extended thermal qualification and tighter ISB2 validation across the wider temperature range.
Can CY7C199-15VC operate at 3.3 V?
No - the device requires 5.0 V ±10% (4.5 V to 5.5 V) per its Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 4.5 V violates VOH/VOL specifications and risks data corruption or failure to enter power-down mode reliably.
Does CY7C199-15VC support battery backup or data retention mode?
Yes - the "L" version (e.g., CY7C199-15VCL) supports 2.0 V data retention with ICCDR ≤ 10 µA. The -15VC suffix indicates commercial grade but does not guarantee L-version features; retention capability must be verified by full part number including "L".
CY7C199-15VC 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
CY7C199-15VC FAQ
1.How can I place an order for CY7C199-15VC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199-15VC 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 CY7C199-15VC reliable?
The price and inventory of CY7C199-15VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199-15VC is usually 5 days.
3.What payment methods are accepted for CY7C199-15VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199-15VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199-15VC?
CY7C199-15VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199-15VC 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 CY7C199-15VC?
For technical support, including CY7C199-15VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199-15VC requirements.
6.How does Aetrix verify that CY7C199-15VC is sourced from the original manufacturer or authorized distributors?
All CY7C199-15VC 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 CY7C199-15VC meets industry standards.
7.What is the process for return or replacement of CY7C199-15VC?
All CY7C199-15VC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199-15VC, 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 CY7C199-15VC part is unused and in its original packaging.
Return procedure for CY7C199-15VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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