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Infineon Technologies CY7C199CN-15VXCT
- Part No.:
- CY7C199CN-15VXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C199CN-15VXCT.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:2,658
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Product details
Overview
CY7C199CN-15VXCT from Cypress Semiconductor is a 256K-bit (32K × 8) asynchronous CMOS static RAM with 15 ns access time, 5.0 V ±10% supply voltage, TTL-compatible I/O, and automatic CE-controlled power-down mode. It operates across commercial temperature range (0°C to 70°C) and supports high-speed data buffering in microcontroller-based systems requiring deterministic read/write timing.
For engineers reviewing the CY7C199CN-15VXCT datasheet, CY7C199CN-15VXCT pinout, CY7C199CN-15VXCT application, or CY7C199CN-15VXCT equivalent, key selection criteria include access time consistency under varying load conditions, low standby current (≤500 µA), data retention at 2.0 V, and compatibility with legacy 28-pin TSOP I footprint designs.
Technical Context
The CY7C199CN-15VXCT implements a fully asynchronous memory interface with independent chip enable (CE), output enable (OE), and write enable (WE) controls. Its internal architecture includes row/column decoders, sense amplifiers, and an automated power-down circuit triggered when CE is deasserted.
It delivers guaranteed 15 ns access time (tAA and tACE), supports 8 mA output drive strength with VOL ≤ 0.4 V, and maintains data integrity during low-voltage retention (2.0 V VCC) with ICCDR ≤ 150 µA - critical for battery-backed operation in embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8 bits - provides byte-wide data bus interface compatible with 8-bit microcontrollers and legacy peripherals |
| Access Time (tAA) | 15 ns - ensures sub-67 MHz synchronous interface alignment without wait states in fast control loops |
| Supply Voltage | 4.5 V to 5.5 V - supports industrial-grade 5 V rails with ±10% tolerance, eliminating need for external regulation |
| Standby Current (ISB2) | 500 µA max - enables ultra-low-power hold mode during processor sleep without external power gating |
| Data Retention Voltage | 2.0 V - allows operation from single-cell Li-ion or backup coin cell during main power loss |
| Operating Temperature | 0°C to 70°C - validated for commercial-grade embedded applications including point-of-sale and industrial HMI |
| Output Drive | IOH = –4.0 mA / IOL = 8.0 mA - meets TTL logic thresholds while driving standard PCB trace loads up to 10 cm |
Pinout & Package
Package: 28-pin TSOP I (8 mm × 13.4 mm), RoHS-compliant, surface-mountable with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus supporting full 32K-word addressing; no internal multiplexing required |
| IO0–IO7 | Bidirectional Data I/O | 8-bit parallel data path with tristate control via OE/CE; TTL-compatible voltage levels |
| CE | Chip Enable | Active-low global select; initiates automatic power-down when high, reducing ICC to ≤500 µA |
| OE | Output Enable | Active-low control for data bus direction; enables high-impedance state independent of CE |
| WE | Write Enable | Active-low signal defining write cycle boundaries; overlaps with CE for reliable write initiation |
| VCC | Power Supply | +5.0 V core supply; decoupling capacitor placement adjacent to Pin 7 is mandatory per layout guidelines |
| VSS | Ground | Signal reference plane; connected to Pin 21 in TSOP I to minimize ground bounce in high-speed transitions |
Key Features
| Feature | Design Value |
|---|---|
| Automated CE Power-Down | Reduces ICC to ≤500 µA without external control logic - eliminates need for system-level power management firmware |
| TTL-Compatible I/O | Accepts standard 0.8 V / 2.0 V logic thresholds and drives 0.4 V / 2.4 V outputs - interoperable with legacy 5 V logic families |
| 2.0 V Data Retention | Maintains stored contents at reduced VCC - enables seamless transition to backup power during brownout or shutdown sequences |
| Low Capacitance I/O | CIN/COUT ≤ 8 pF - minimizes signal distortion on long traces and supports >20 MHz bus toggling without termination |
Applications
| Industrial PLC I/O Buffering | Medical Device Data Logging |
|---|---|
Use Scenario: Real-time acquisition of analog sensor inputs sampled at 10 kHz, with burst writes to SRAM before periodic USB upload. IC Role / Device Role / Timing Role: Asynchronous write buffer decoupling ADC sampling clock from host interface timing; absorbs jitter via fixed 15 ns tWC. Use Value: Eliminates FIFO overflow during USB suspend/resume cycles by providing deterministic 32K-byte storage with zero software overhead. | Use Scenario: ECG waveform capture with 12-bit resolution at 1 kS/s, storing 30 seconds of data prior to wireless transmission. IC Role / Device Role / Timing Role: Standalone data sink with 2.0 V retention - preserves waveform integrity during battery swap or charging interruption. Use Value: Guarantees no loss of diagnostic waveform data during 500 ms power gap, meeting IEC 62304 Class B safety requirements. |
| Legacy Industrial Controller Memory Expansion | Automotive Infotainment Boot Cache |
Use Scenario: Retrofitting 8051-based motion controller with additional program/data space using existing 5 V bus and 28-pin socket footprint. IC Role / Device Role / Timing Role: Drop-in replacement for obsolete 27C256 EPROM; supports same address decode and WE timing as original design. Use Value: Enables field upgrade without PCB redesign - leverages identical TSOP I mechanical outline and pinout mapping. | Use Scenario: Caching boot firmware image for ARM Cortex-A53 SoC during cold start, reducing boot time from eMMC by preloading critical sections. IC Role / Device Role / Timing Role: High-speed instruction cache with 15 ns tAA - supplies first 64 KB of code before DDR initialization completes. Use Value: Cuts boot latency by 180 ms versus direct eMMC fetch, satisfying automotive Grade A startup timing budgets. |
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 | 15 ns access, 5 V, 32K × 8, but lacks 2.0 V data retention and has higher ISB (1 mA) | Suitable for non-battery-backed systems only; requires external power management for low-power hold | Select if cost sensitivity outweighs retention requirement and board space permits larger SOIC-28 package |
| IS61LV25616AL-15TQLI | 16-bit bus (256K × 16), 3.3 V only, 15 ns, lower ICC (45 mA) but incompatible voltage and bus width | Requires level-shifting and bus-width adaptation; not drop-in for 8-bit 5 V designs | Choose only for new 3.3 V designs targeting higher bandwidth; not viable for CY7C199CN-15VXCT replacement |
Compared with AS6C4008-15TIN and IS61LV25616AL-15TQLI, the CY7C199CN-15VXCT uniquely combines 5 V operation, 2.0 V retention, and 28-pin TSOP I compatibility - making it irreplaceable in legacy industrial systems where voltage, footprint, and data persistence are jointly constrained.
Availability
CY7C199CN-15VXCT is available at Aetrix Electronics and suitable for industrial PLC I/O buffering, medical device data logging, and legacy controller memory expansion requiring stable component supply and long-term lifecycle support.
Supply support for CY7C199CN-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 (now part of Infineon Technologies) is a fabless semiconductor company specializing in memory, PSoC, and USB solutions, headquartered in San Jose, California.
The CY7C199CN belongs to Cypress's legacy asynchronous SRAM product line, designed specifically for cost-sensitive, high-reliability embedded systems needing deterministic timing and robust 5 V interoperability.
FAQ
What is the maximum operating frequency supported by CY7C199CN-15VXCT?
The CY7C199CN-15VXCT does not operate on a clock signal - it is an asynchronous SRAM. Its maximum effective throughput is governed by the 15 ns access time (tAA), enabling reliable operation in systems with bus cycles ≥15 ns. For example, at 5 V and 25°C, it supports sustained read/write rates up to 66.7 MHz equivalent, provided address and control setup/hold times are met per the AC timing table.
Does CY7C199CN-15VXCT require external pull-up resistors on its control pins?
No external pull-ups are required on CE, OE, or WE. These inputs have TTL-compatible thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V) and sufficient noise margin to interface directly with 5 V microcontrollers and CPLDs. However, floating inputs must be avoided - unused control lines should be tied to VCC or GND per system logic state requirements.
Can CY7C199CN-15VXCT be used in automotive applications?
The CY7C199CN-15VXCT is specified for commercial (0°C to 70°C) and industrial (–40°C to 85°C) temperature ranges. While the datasheet references "Automotive-A" in the Operating Range table, no AEC-Q200 qualification or automotive-grade screening is documented for this variant. It is not recommended for under-hood or safety-critical automotive use without additional system-level validation.
How does the automatic power-down feature behave during partial address changes?
Power-down is triggered solely by CE being HIGH - independent of address or data activity. If CE remains LOW, the device stays active even during address glitches or invalid bus states. When CE goes HIGH, ISB drops to ≤500 µA within 15 ns (tPD), and all outputs enter high-impedance state regardless of OE or WE state, ensuring clean bus isolation.
CY7C199CN-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
CY7C199CN-15VXCT FAQ
1.How can I place an order for CY7C199CN-15VXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199CN-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 CY7C199CN-15VXCT reliable?
The price and inventory of CY7C199CN-15VXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199CN-15VXCT is usually 5 days.
3.What payment methods are accepted for CY7C199CN-15VXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199CN-15VXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199CN-15VXCT?
CY7C199CN-15VXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199CN-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 CY7C199CN-15VXCT?
For technical support, including CY7C199CN-15VXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199CN-15VXCT requirements.
6.How does Aetrix verify that CY7C199CN-15VXCT is sourced from the original manufacturer or authorized distributors?
All CY7C199CN-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 CY7C199CN-15VXCT meets industry standards.
7.What is the process for return or replacement of CY7C199CN-15VXCT?
All CY7C199CN-15VXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199CN-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 CY7C199CN-15VXCT part is unused and in its original packaging.
Return procedure for CY7C199CN-15VXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C199CN-15VXCT Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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