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Infineon Technologies CY7C199CL-15VXCT
- Part No.:
- CY7C199CL-15VXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C199CL-15VXCT.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,091
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Product details
Overview
CY7C199CL-15VXCT from Cypress Semiconductor is a 256K (32K × 8) asynchronous CMOS static RAM with 15 ns access time, 5.0 V ±10% supply voltage, TTL-compatible I/Os, automatic CE-controlled power-down, and 2.0 V data retention capability. It serves as a high-speed, low-power memory buffer in embedded controllers, industrial PLCs, and legacy communication interface modules.
For engineers reviewing the CY7C199CL-15VXCT datasheet, CY7C199CL-15VXCT pinout, CY7C199CL-15VXCT application, or CY7C199CL-15VXCT equivalent, key selection criteria include access time consistency across temperature, standby current under CMOS input conditions, CE-driven power-down timing, and compatibility with 28-pin TSOP I footprint layouts.
Technical Context
The CY7C199CL-15VXCT implements an asynchronous SRAM architecture with independent address decoding, sense amplifier-based read path, and bidirectional I/O buffers controlled by CE, OE, and WE. Its power-down circuit activates automatically when CE is deasserted, reducing ICC to ≤10 µA at CMOS input levels.
Timing behavior is defined by overlapping control signals: write initiation requires simultaneous CE and WE assertion, while read output is enabled only when CE and OE are both active. Data hold times (tOHA = 3 ns, tHD = 0 ns) and output enable/disable delays (tLZOE/tHZOE = 0/7 ns) are specified under 50-pF load and 1.5-V switching thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8 bits - supports byte-wide data bus interfacing without external demultiplexing |
| Access Time (tAA) | 15 ns max - guarantees valid data within 15 ns of stable address and CE/OE assertion |
| VCC Operating Range | 4.5 V to 5.5 V - compatible with standard 5-V TTL logic rails and industrial power supplies |
| CMOS Standby Current (ISB2) | 10 µA max - enables ultra-low-power retention mode when CE ≥ VCC − 0.3 V |
| Data Retention Voltage | 2.0 V min - maintains stored data during brown-out or backup-battery operation |
| Input/Output Compatibility | TTL-compatible - accepts 0.8 V / 2.2 V logic thresholds and drives 2.4 V / 0.4 V under 4 mA / 8 mA loads |
| Package Type | 28-pin TSOP I (Z28) - surface-mount footprint with 8 mm × 13.4 mm body and 0.55 mm pitch |
Pinout & Package
Package: 28-pin Thin Small Outline Package Type I (TSOP I), Z28 variant, 8 mm × 13.4 mm body, 0.55 mm lead pitch, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus accepting 0–32767 row/column select for 32K × 8 memory map |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface supporting read data output and write data input; high-impedance when OE/CE inactive |
| CE | Chip Enable | Active-low master enable controlling device selection and automatic power-down entry/exit |
| OE | Output Enable | Active-low signal enabling data output drivers; does not affect write operations |
| WE | Write Enable | Active-low signal qualifying write cycles; combined with CE to define write window timing |
| VCC | Power Supply | +5.0 V ±10% core supply; powers internal logic, array, and I/O buffers |
| VSS | Ground Reference | 0 V return path for all internal circuits and I/O signaling |
Key Features
| Feature | Design Value |
|---|---|
| 15 ns Access Time | Guaranteed tAA ≤ 15 ns over full commercial temperature range (0°C to +70°C), enabling integration into 66 MHz CPU bus systems |
| Automatic CE Power-down | Reduces ICC to ≤10 µA when CE is high and inputs meet CMOS threshold, eliminating need for external sleep control logic |
| 2.0 V Data Retention | Maintains stored contents down to 2.0 V VCC, supporting battery-backed operation during main supply interruption |
| TTL-Compatible I/O | Accepts standard TTL input thresholds and drives 4-mA HIGH / 8-mA LOW loads, simplifying interface with legacy microcontrollers |
| Low Input Capacitance | CIN ≤ 8 pF per pin minimizes signal loading on address/data buses, preserving timing margins in dense PCB layouts |
Applications
| Industrial PLC Memory Buffer | Legacy Communication Interface Module |
|---|---|
|
Use Scenario: Storing real-time I/O status and configuration registers in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Asynchronous SRAM providing non-refreshed, deterministic read/write latency for cyclic scan execution. Use Value: 15 ns access time ensures sub-cycle memory access for 66 MHz bus masters; 10 µA ISB2 enables energy-efficient idle states between scans. |
Use Scenario: Acting as packet buffer and command FIFO in RS-485/RS-232 protocol translation gateways with microcontroller host interfaces. IC Role / Device Role / Timing Role: Byte-wide memory mapped to MCU address space, accessed via CE/OE/WE handshaking without wait states. Use Value: TTL-compatible I/O eliminates level-shifter components; 2.0 V data retention preserves last valid packet during transient power loss. |
| Embedded Controller Bootloader Cache | Test Equipment Firmware Storage |
|
Use Scenario: Caching boot code and calibration tables in automotive engine control units where EEPROM endurance is insufficient. IC Role / Device Role / Timing Role: Volatile but fast-access storage holding critical runtime parameters loaded at power-up from flash. Use Value: 32K × 8 organization matches typical bootloader size; 8 pF input capacitance prevents signal integrity degradation on shared address bus. |
Use Scenario: Holding firmware images and instrument configuration data in benchtop oscilloscopes and logic analyzers requiring rapid reprogramming. IC Role / Device Role / Timing Role: Memory-mapped SRAM used for in-system firmware updates and volatile test pattern generation. Use Value: TSOP I package enables compact layout on high-density test equipment PCBs; tHZOE = 7 ns allows fast output disable during bus arbitration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar asynchronous SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISSI IS61LV25616AL-15TQLI | 32K × 16 organization, 15 ns access, 3.3 V supply only, LVCMOS I/O | Requires bus-width adaptation (16-bit vs. 8-bit); incompatible with 5 V systems | Select only if migrating to 3.3 V platform and redesigning data bus width |
| ON Semiconductor MCM6295DW15 | 32K × 8, 15 ns, 5 V, but no automatic power-down; ISB = 1 mA typical | Lacks CE-triggered low-power mode; higher standby consumption in intermittent-use systems | Prefer when cost sensitivity outweighs power budget constraints and external power gating is acceptable |
Compared with IS61LV25616AL-15TQLI and MCM6295DW15, the CY7C199CL-15VXCT uniquely delivers 5 V operation, byte-wide compatibility, and sub-10 µA CMOS standby-making it optimal for legacy 5 V industrial designs requiring zero-software power management.
Availability
CY7C199CL-15VXCT is available at Aetrix Electronics and suitable for industrial PLCs, legacy communication interface modules, embedded controller bootloader caches, and test equipment firmware storage requiring stable component supply and long-term obsolescence support.
Supply support for CY7C199CL-15VXCT 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 Corporation, now part of Infineon Technologies, designs high-reliability memory and programmable logic solutions for industrial, automotive, and communications markets.
The CY7C199C series was engineered specifically for cost-sensitive, 5 V embedded systems needing fast, low-power asynchronous SRAM with robust industrial temperature support and drop-in compatibility with legacy memory sockets.
FAQ
Is CY7C199CL-15VXCT RoHS-compliant?
Yes. The "L" suffix denotes lead-free construction per JEDEC J-STD-609, with matte tin terminations and halogen-free molding compound. It meets RoHS Directive 2011/65/EU and is compatible with Pb-free reflow profiles (peak 260°C).
What is the maximum operating temperature range for this part?
The CY7C199CL-15VXCT is rated for commercial temperature operation (0°C to +70°C). Its electrical specifications-including 15 ns access time and 10 µA ISB2-are guaranteed across this full range, with derating not required up to +70°C.
Can this SRAM be used with a 3.3 V microcontroller interface?
No. The device requires 4.5 V to 5.5 V VCC and has TTL-compatible inputs (VIH = 2.2 V min), but its outputs swing to 2.4 V min under 4 mA load-insufficient for reliable 3.3 V logic HIGH recognition. Level-shifting circuitry is mandatory for 3.3 V hosts.
Does the automatic power-down feature require external control signals?
No. Power-down is fully autonomous: asserting CE ≥ VCC − 0.3 V (or CE ≥ VIH for TTL inputs) triggers internal circuitry that reduces ICC to ≤10 µA without OE or WE involvement. No external sequencing or timers are needed.
CY7C199CL-15VXCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 28-BSOJ (0.300", 7.62mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
CY7C199CL-15VXCT FAQ
1.How can I place an order for CY7C199CL-15VXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199CL-15VXCT 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 CY7C199CL-15VXCT reliable?
The price and inventory of CY7C199CL-15VXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199CL-15VXCT is usually 5 days.
3.What payment methods are accepted for CY7C199CL-15VXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199CL-15VXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199CL-15VXCT?
CY7C199CL-15VXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199CL-15VXCT 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 CY7C199CL-15VXCT?
For technical support, including CY7C199CL-15VXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199CL-15VXCT requirements.
6.How does Aetrix verify that CY7C199CL-15VXCT is sourced from the original manufacturer or authorized distributors?
All CY7C199CL-15VXCT 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 CY7C199CL-15VXCT meets industry standards.
7.What is the process for return or replacement of CY7C199CL-15VXCT?
All CY7C199CL-15VXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199CL-15VXCT, 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 CY7C199CL-15VXCT part is unused and in its original packaging.
Return procedure for CY7C199CL-15VXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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