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Infineon Technologies CY7C199NL-15ZXC
- Part No.:
- CY7C199NL-15ZXC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
CY7C199NL-15ZXC.pdf
- Description:
- IC SRAM 256KBIT PAR 28TSOP I
- Quantity:
- Payment:
- Shipping:
Inventory:2,754
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Product details
Overview
CY7C199NL-15ZXC from Cypress Semiconductor is a 32K × 8 (262,144-bit) high-speed CMOS static RAM with 15 ns access time, TTL-compatible I/O, active-low CE/OE/WE control, and automatic power-down reducing standby current to 50 µA. It operates at 5 V ±10%, supports 2 V data retention in low-power mode, and is used in legacy industrial controllers, embedded instrumentation buffers, and FPGA configuration memory interfaces.
For engineers reviewing the CY7C199NL-15ZXC datasheet, CY7C199NL-15ZXC pinout, CY7C199NL-15ZXC application, or CY7C199NL-15ZXC equivalent, key selection criteria include tRC = 15 ns read cycle time, ISB2 = 0.05 mA CMOS standby current, VDR = 2.0 V data retention voltage, and TSOP I 28-pin package compatibility with legacy PCB footprints.
Technical Context
The CY7C199NL-15ZXC implements a full asynchronous SRAM architecture with independent address decoding (A0–A14), bidirectional 8-bit I/O bus (I/O0–I/O7), and three-state output drivers controlled by OE and CE. Its automatic power-down activates when CE is HIGH, reducing ICC from 100 mA to 0.05 mA without external logic.
Write operation requires simultaneous LOW CE and WE; read requires LOW CE and OE with WE HIGH. Data retention mode engages at VCC = 2.0 V with CE held HIGH and inputs clamped, sustaining stored data with ICCDR ≤ 10 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32,768 × 8 bits - provides 256 KB addressable byte space for firmware/data buffering |
| Access Time (tAA) | 15 ns - enables direct interface with 66 MHz microcontrollers without wait states |
| Supply Voltage | 5 V ±10% - compatible with standard TTL/CMOS logic rails and legacy 5 V systems |
| Standby Current (ISB2) | 0.05 mA - allows battery-backed operation for >1 year on coin-cell power in hold mode |
| Data Retention Voltage | 2.0 V - maintains memory contents during brown-out or controlled power-down sequences |
| Output Enable Delay (tDOE) | 7 ns - ensures fast data availability after OE assertion, critical for burst-mode reads |
| Input Capacitance | 8 pF - minimizes loading on address/data buses, supporting >10 loads per line |
Pinout & Package
Package: 28-pin TSOP I (Thin Small Outline Package), 8.3 mm × 13.4 mm body, 0.55 mm pitch, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus selecting one of 32,768 memory locations |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit tristatable I/O lines shared for read/write; high-impedance when CE or OE inactive |
| CE | Chip Enable (active LOW) | Primary device select; enables automatic power-down when HIGH |
| OE | Output Enable (active LOW) | Controls output driver enable; must be LOW for read data to appear on I/O lines |
| WE | Write Enable (active LOW) | Controls write operation; LOW with CE LOW initiates write; HIGH during CE LOW enables read |
| VCC | Power Supply | +5 V supply pin (Pin 28); decoupling required within 10 mm for stable 15 ns timing |
| GND | Ground | Reference plane (Pin 14); must be low-inductance connection to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Power-Down | Reduces ICC from 100 mA to 0.05 mA when CE is deasserted - eliminates need for external power-gating logic |
| TTL-Compatible I/O | VIH = 2.2 V min, VOL = 0.4 V max - ensures interoperability with 74LS, 74HC, and microcontroller GPIOs |
| 2 V Data Retention | Maintains stored data at VCC = 2.0 V with CE HIGH - supports graceful shutdown in power-fail scenarios |
| Fast tDOE = 7 ns | Delivers valid data within 7 ns of OE assertion - enables tight timing margins in high-throughput buffer applications |
| Alpha Particle Immunity | Die coat layer suppresses soft errors - suitable for industrial environments with elevated radiation exposure |
Applications
| Industrial PLC Data Buffer | FPGA Configuration Memory |
|---|---|
Use Scenario: Storing real-time I/O scan data between CPU cycles in programmable logic controllers. IC Role / Device Role / Timing Role: Asynchronous SRAM providing zero-wait-state read/write access for deterministic scan loop timing. Use Value: 15 ns tAA and 7 ns tDOE ensure sub-microsecond data transfer, meeting <1 µs I/O update deadlines. | Use Scenario: Holding configuration bitstream for Xilinx Spartan-3 FPGAs during power-up and reconfiguration. IC Role / Device Role / Timing Role: Nonvolatile-configurable memory mapped to FPGA's parallel slave select interface. Use Value: 2 V data retention allows safe bitstream preservation during brown-out events before backup power engages. |
| Legacy Medical Instrumentation | Automotive Body Control Module |
Use Scenario: Buffering sensor acquisition data in ECG and patient monitor front-ends prior to DSP processing. IC Role / Device Role / Timing Role: High-reliability SRAM interfaced to 8051-based controller via multiplexed address/data bus. Use Value: 8 pF input capacitance prevents signal integrity degradation across long PCB traces in mixed-signal analog-digital layouts. | Use Scenario: Storing runtime variables and fault logs in CAN-connected body control units operating across –40°C to +125°C. IC Role / Device Role / Timing Role: Temperature-stable SRAM supporting EEPROM offload for frequent write operations. Use Value: ISB2 = 0.05 mA standby current extends battery life during vehicle sleep mode without compromising data persistence. |
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 | Same 32K × 8 organization, 15 ns speed, but uses 28-pin SOJ package and lacks 2 V data retention | Requires PCB redesign due to SOJ footprint; unsuitable for brown-out retention use cases | Select only if TSOP I footprint is unavailable and data retention below 4.5 V is unnecessary |
| IS61LV25616AL-15TQLI | Wider 16-bit bus (256K × 16), 3.3 V core, 15 ns access, LVTTL-compatible, no 2 V retention | Higher density and lower voltage, but incompatible pinout and voltage domain; needs level-shifting | Choose for new 3.3 V designs requiring higher bandwidth; not drop-in for CY7C199NL-15ZXC |
Compared with AS6C4008-15TIN and IS61LV25616AL-15TQLI, the CY7C199NL-15ZXC uniquely delivers 2 V data retention in a TSOP I package with proven 5 V TTL interoperability-critical for maintaining legacy system compatibility and power-fail resilience.
Availability
CY7C199NL-15ZXC is available at Aetrix Electronics and suitable for industrial PLC data buffering, FPGA configuration memory, legacy medical instrumentation, and automotive body control modules requiring stable component supply and long-term obsolescence support.
Supply support for CY7C199NL-15ZXC 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) designs high-reliability memory and programmable logic solutions for industrial, automotive, and communications infrastructure.
The CY7C199N series was developed specifically for cost-sensitive, high-reliability 5 V embedded systems requiring fast, low-power asynchronous SRAM with robust data retention-targeting legacy controller upgrades and long-lifecycle equipment.
FAQ
Is CY7C199NL-15ZXC RoHS-compliant?
Yes. CY7C199NL-15ZXC is RoHS-compliant and lead-free per JEDEC J-STD-609, with matte tin finish on all leads and halogen-free molding compound. It meets EU Directive 2011/65/EU and is rated for MSL Level 3 per J-STD-020.
Can CY7C199NL-15ZXC operate at 3.3 V?
No. The device is specified only for 5 V ±10% operation (4.5 V to 5.5 V). Applying 3.3 V violates the Absolute Maximum Rating for VCC and results in undefined behavior, including failure to retain data or meet timing specifications.
What is the maximum clock frequency supported for read/write cycles?
This is an asynchronous SRAM with no internal clock. Maximum effective throughput is determined by tRC = 15 ns, enabling up to 66.7 MHz sustained random access rate. Burst reads are limited by address setup/hold and OE/CE timing-not by a clock signal.
Does CY7C199NL-15ZXC require external pull-up resistors on control pins?
No. All control inputs (CE, OE, WE) have TTL-compatible thresholds and do not require external pull-ups for proper logic-level recognition. However, floating inputs must be avoided; unused control lines should be tied to VCC or GND per system reset requirements.
CY7C199NL-15ZXC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm Width)
- Packaging:
- Bulk
- 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
CY7C199NL-15ZXC FAQ
1.How can I place an order for CY7C199NL-15ZXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199NL-15ZXC 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 CY7C199NL-15ZXC reliable?
The price and inventory of CY7C199NL-15ZXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199NL-15ZXC is usually 5 days.
3.What payment methods are accepted for CY7C199NL-15ZXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199NL-15ZXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199NL-15ZXC?
CY7C199NL-15ZXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199NL-15ZXC 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 CY7C199NL-15ZXC?
For technical support, including CY7C199NL-15ZXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199NL-15ZXC requirements.
6.How does Aetrix verify that CY7C199NL-15ZXC is sourced from the original manufacturer or authorized distributors?
All CY7C199NL-15ZXC 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 CY7C199NL-15ZXC meets industry standards.
7.What is the process for return or replacement of CY7C199NL-15ZXC?
All CY7C199NL-15ZXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199NL-15ZXC, 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 CY7C199NL-15ZXC part is unused and in its original packaging.
Return procedure for CY7C199NL-15ZXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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