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Infineon Technologies CY7C199-15ZC
- Part No.:
- CY7C199-15ZC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
CY7C199-15ZC.pdf
- Description:
- IC SRAM 256KBIT 15NS 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,958
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Product details
Overview
CY7C199-15ZC from Cypress Semiconductor is a 32K × 8 (262,144-bit) high-speed CMOS static RAM with 15 ns maximum access time, TTL-compatible I/O, active-low CE/OE/WE control, and automatic power-down reducing standby current to 0.05 mA (CMOS mode). It operates at 5V ±10% across commercial (0°C to +70°C) and industrial (–40°C to +85°C) temperature ranges and is used in microcontroller-based data buffers, legacy industrial controllers, and instrumentation memory expansion.
For engineers reviewing the CY7C199-15ZC datasheet, CY7C199-15ZC pinout, CY7C199-15ZC application, or CY7C199-15ZC equivalent, key selection criteria include tAA = 15 ns read timing, ISB2 = 0.05 mA CMOS standby current, CE-controlled power-down behavior, and compatibility with 28-pin SOJ/DIP/LCC footprints in space-constrained embedded systems.
Technical Context
The CY7C199-15ZC implements a synchronous, non-volatile-retentive SRAM array organized as 32,768 words × 8 bits, using three-state bidirectional I/O drivers and dual active-low enable logic (CE and OE) for hierarchical memory banking. Its write operation requires simultaneous CE and WE low states, while read output is enabled only when CE and OE are low and WE is high.
It features automatic CE-driven power-down that reduces ICC from 155 mA (active) to 0.05 mA (standby) under CMOS input conditions, with guaranteed data retention down to 2.0 V on the "L" version-though CY7C199-15ZC is not an "L" variant and does not support 2V retention. Pin-compatible with industry-standard 28-pin SOJ packages, it maintains TTL-level DC thresholds (VIH = 2.2 V, VIL = 0.8 V) and 30 pF AC load compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8 (262,144 bits), fixed parallel interface with no internal refresh or burst logic |
| Access Time (tAA) | 15 ns max - defines minimum address-to-valid-data delay in read cycles under worst-case VCC/temperature |
| Standby Current (ISB2) | 0.05 mA max (CMOS inputs) - enables ultra-low-power hold state when CE is deasserted |
| Operating Voltage | 5.0 V ±10% - requires stable 4.5–5.5 V supply; not compatible with 3.3 V or mixed-voltage I/O domains |
| I/O Compatibility | TTL input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V) and output drive (IOH = –4 mA, IOL = 8 mA) |
| Package Type | 28-pin SOJ (Small Outline J-Lead) - 300-mil width, JEDEC MS-012AC compliant, lead-free option ZC |
| Temperature Range | Commercial (0°C to +70°C) and Industrial (–40°C to +85°C) - specified performance across both grades |
Pinout & Package
The CY7C199-15ZC is packaged in a 28-pin Small Outline J-Lead (SOJ) with 300-mil body width, compliant with JEDEC MS-012AC. Pin 14 is GND and Pin 28 is VCC; all address (A0–A14), data (I/O0–I/O7), and control (CE, OE, WE) signals are assigned per standard 28-pin SRAM layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit binary address bus selecting one of 32,768 memory locations |
| I/O0–I/O7 | Bidirectional Data Bus | Three-state CMOS/TTL-compatible lines shared for read output and write input |
| CE (Pin 1) | Chip Enable | Active-low global select; disables outputs and triggers automatic power-down when high |
| OE (Pin 20) | Output Enable | Active-low output gate; controls data bus tristate independently of CE during reads |
| WE (Pin 22) | Write Enable | Active-low write strobe; initiates write when CE is also low; high during reads |
| VCC (Pin 28) | Power Supply | +5 V ±10% main supply; powers core logic and I/O buffers |
| GND (Pin 14) | Ground Reference | Primary return path for VCC and signal currents; must be low-impedance |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE Power-Down | Reduces ICC from 155 mA to 0.05 mA when CE is high, eliminating need for external power gating |
| Fast OE-Controlled Output Enable | tDOE = 7 ns max ensures rapid data availability after OE assertion, critical for burst-read interfaces |
| Three-State Output Drivers | High-impedance I/O pins when CE or OE inactive, enabling direct bus sharing without external transceivers |
| TTL-Compatible Interface | Accepts standard 5 V logic levels and drives 4 mA high / 8 mA low loads, simplifying integration with legacy MCU buses |
| 28-Pin SOJ Footprint | Standardized package supports drop-in replacement in existing 300-mil DIP/SOJ sockets and PCB layouts |
Applications
| Industrial PLC Data Buffer | Legacy Microcontroller Memory Expansion |
|---|---|
Use Scenario: Storing real-time sensor logs and control state variables in programmable logic controllers with 8-bit data buses. IC Role / Device Role / Timing Role: Primary volatile working memory interfaced directly to Z80 or 8051 derivatives via parallel address/data bus. Use Value: 15 ns tAA enables deterministic response within tight scan-cycle deadlines; CE power-down cuts idle power by >99.9% during polling gaps. | Use Scenario: Adding external RAM to 8-bit microcontrollers lacking sufficient on-chip SRAM for firmware overlays or display frame buffers. IC Role / Device Role / Timing Role: Asynchronous parallel memory mapped at fixed address range, accessed via MOVX or similar instructions. Use Value: TTL compatibility eliminates level-shifting; OE/WE separation allows precise control over bus contention and write timing margins. |
| Test Equipment FIFO Buffer | Avionics Maintenance Terminal Memory |
Use Scenario: Capturing high-speed analog-to-digital conversion streams in benchtop oscilloscopes and logic analyzers. IC Role / Device Role / Timing Role: Circular buffer memory supporting continuous write capture and sequential readback under CPU or DMA control. Use Value: tPD = 15 ns guarantees fast exit from power-down on trigger events; tHZOE = 7 ns ensures clean output release before next sample clock edge. | Use Scenario: Storing diagnostic configuration tables and flight log snapshots in certified maintenance terminals operating in extended temperature environments. IC Role / Device Role / Timing Role: Non-refreshing, radiation-tolerant (die coat enhanced) SRAM for mission-critical data storage where DRAM is unsuitable. Use Value: Industrial-grade temp range (–40°C to +85°C) and 0.05 mA ISB2 support battery-backed operation during aircraft ground power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C4008-15ZC | Same 32K × 8 organization, 15 ns access, but uses 2.7–3.6 V supply and LVCMOS I/O | Requires level translation for 5 V systems; lower active power but incompatible voltage domain | Select only if migrating to 3.3 V architecture and redesigning power/signal integrity |
| IS61LV25616AL-15TQLI | 256K × 16 organization, 3.3 V core, 15 ns speed, but 44-pin TSOP-II package | Higher density and wider bus, but incompatible pinout and voltage; no direct socket replacement | Choose for new designs needing more memory bandwidth; not suitable for CY7C199-15ZC footprint reuse |
Compared with AS6C4008-15ZC and IS61LV25616AL-15TQLI, the CY7C199-15ZC uniquely delivers 5 V TTL compatibility, 28-pin SOJ footprint, and proven industrial temperature reliability-making it irreplaceable in legacy 5 V embedded systems requiring exact mechanical and electrical fit.
Availability
CY7C199-15ZC is available at Aetrix Electronics and suitable for industrial PLCs, legacy microcontroller platforms, test equipment data buffers, and avionics maintenance terminals requiring stable component supply across long production lifecycles.
Supply support for CY7C199-15ZC 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 founded in 1982, specializing in memory, microcontrollers, and programmable logic solutions for industrial and automotive markets.
The CY7C199 belongs to Cypress's legacy parallel SRAM product line, designed specifically for drop-in memory expansion in 8-bit and 16-bit microprocessor systems where simplicity, reliability, and 5 V compatibility are prioritized over density or low-voltage operation.
FAQ
Is CY7C199-15ZC compatible with 3.3 V systems?
No. The CY7C199-15ZC is strictly a 5 V device with VCC specification of 4.5–5.5 V. Its TTL-compatible inputs require VIH ≥ 2.2 V and VIL ≤ 0.8 V referenced to 5 V, and it lacks 3.3 V I/O tolerance. Direct connection to 3.3 V controllers will cause functional failure or damage due to overvoltage on outputs.
Does CY7C199-15ZC support data retention at reduced voltage?
No. Data retention at 2.0 V is exclusive to the "L" speed grade variants (e.g., CY7C199-15L). The CY7C199-15ZC is a standard-speed part without data retention capability below 4.5 V; it loses stored data immediately upon VCC dropout or brownout.
What is the meaning of "ZC" in the part number?
"ZC" denotes the RoHS-compliant, lead-free, 28-pin SOJ package variant per JEDEC MS-012AC. It replaces traditional tin-lead solder terminations with matte tin plating and meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) requirements for surface-mount assembly.
Can CY7C199-15ZC be used in place of CY7C199-15PC?
Yes, functionally and electrically identical-both share the same 15 ns speed grade, 5 V operation, and 32K × 8 organization. The "ZC" suffix indicates lead-free SOJ packaging, while "PC" denotes leaded plastic DIP. Mechanical mounting differs, but pinout, timing, and logic behavior are fully interchangeable in circuit design.
CY7C199-15ZC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm 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:
- 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-TSOP I
CY7C199-15ZC FAQ
1.How can I place an order for CY7C199-15ZC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199-15ZC 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 CY7C199-15ZC reliable?
The price and inventory of CY7C199-15ZC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199-15ZC is usually 5 days.
3.What payment methods are accepted for CY7C199-15ZC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199-15ZC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199-15ZC?
CY7C199-15ZC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199-15ZC 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 CY7C199-15ZC?
For technical support, including CY7C199-15ZC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199-15ZC requirements.
6.How does Aetrix verify that CY7C199-15ZC is sourced from the original manufacturer or authorized distributors?
All CY7C199-15ZC 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 CY7C199-15ZC meets industry standards.
7.What is the process for return or replacement of CY7C199-15ZC?
All CY7C199-15ZC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199-15ZC, 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 CY7C199-15ZC part is unused and in its original packaging.
Return procedure for CY7C199-15ZC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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