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Infineon Technologies CY7C199C-15VXCT
- Part No.:
- CY7C199C-15VXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C199C-15VXCT.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:2,177
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Product details
Overview
CY7C199C-15VXCT from Cypress Semiconductor is a 256K-bit (32K × 8) asynchronous CMOS static RAM with 15 ns access time, TTL-compatible I/Os, and automatic CE-controlled power-down. It operates across 4.5V–5.5V and retains data at 2.0V, supporting embedded microcontroller systems requiring fast, low-power non-volatile memory buffering in industrial control and instrumentation.
For engineers reviewing the CY7C199C-15VXCT datasheet, CY7C199C-15VXCT pinout, CY7C199C-15VXCT application, or CY7C199C-15VXCT equivalent, key selection criteria include access time consistency across temperature, CMOS standby current (≤10 µA), VCC retention voltage (2.0V), and compatibility with legacy 28-pin SOJ/TSOP I/DIP footprints.
Technical Context
The CY7C199C-15VXCT implements a fully asynchronous SRAM 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 supports three timing grades (12/15/20 ns), with this variant specified for 15 ns max tAA and tRC. Data retention is guaranteed at 2.0V with ≤150 µA ICCDR, and it meets industrial temperature range (–40°C to +85°C) under 5.0V ±10% supply.
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 peripherals |
| Access Time (tAA) | 15 ns max - ensures reliable read response within tight timing windows of high-speed MCU buses |
| Supply Voltage Range | 4.5V to 5.5V - supports standard 5V logic rails with ±10% tolerance for industrial power variation |
| Data Retention Voltage | 2.0V min - enables battery-backed operation during main power loss without data corruption |
| CMOS Standby Current (ISB2) | 10 µA max - reduces system quiescent power when deselected, critical for low-duty-cycle monitoring nodes |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade deployment without derating or thermal management overhead |
| Input/Output Compatibility | TTL-compatible - eliminates level-shifting requirements when interfacing with legacy 5V logic families |
Pinout & Package
Package: 28-pin TSOP I (8 mm × 13.4 mm), RoHS-compliant, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus accepting 0–32767 for full 32K-word addressing |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel data path; high-impedance when OE = VIH or CE = VIH |
| CE | Chip Enable | Active-low master select; initiates automatic power-down when high |
| OE | Output Enable | Active-low control for data output gating; does not affect write operations |
| WE | Write Enable | Active-low signal enabling write cycles; must overlap with CE LOW to store data |
| VCC | Power Supply | +5.0V core supply; decoupling required within 10 mm of pin 7 per layout guidelines |
| VSS | Ground | Reference return for all signals and power; connected to pin 21 in TSOP I |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE Power-down | Reduces ICC to 10 µA when CE is deasserted - eliminates need for external sleep controllers in intermittent-read systems |
| 2.0V Data Retention | Maintains stored contents during brown-out or backup-battery operation - enables fail-safe state preservation |
| 15 ns Access Time | Meets timing budgets of 66 MHz CPU buses without wait states - simplifies interface design for legacy 8051/68K-based platforms |
| TTL-Compatible I/O | Accepts 0.8V/2.0V logic thresholds and drives 2.4V/0.4V levels - interoperable with 74LS, 74HC, and microcontroller GPIOs |
| Three Package Options | SOJ, DIP, and TSOP I footprints - supports prototyping (DIP), legacy repair (SOJ), and high-density production (TSOP I) |
Applications
| Industrial PLC Data Buffering | Medical Instrumentation Memory Cache |
|---|---|
Use Scenario: Real-time acquisition of analog sensor streams in programmable logic controllers with periodic batch upload to HMI. IC Role / Device Role / Timing Role: Asynchronous SRAM buffer staging raw ADC samples between sampling interrupt and communication task execution. Use Value: 15 ns access ensures zero-wait-state reads during 10 µs context switches; 2.0V retention preserves last valid sample during brief AC dropout. | Use Scenario: ECG waveform capture in portable diagnostic devices with battery backup and USB host upload. IC Role / Device Role / Timing Role: High-reliability temporary storage for 32K samples prior to compression and transfer, operating across –40°C to +85°C ambient. Use Value: Industrial temp grade and 10 µA ISB2 extend battery life >72 hours in standby; TSOP I footprint enables compact PCB layout. |
| Legacy Microcontroller Expansion Memory | Automated Test Equipment (ATE) Pattern Storage |
Use Scenario: Adding external RAM to 8-bit MCUs (e.g., PIC18F, 8051 derivatives) where on-chip RAM is insufficient for firmware overlays. IC Role / Device Role / Timing Role: Byte-accessible memory mapped into external data space via dedicated address/data bus interface. Use Value: TTL compatibility eliminates level shifters; 28-pin DIP/SOJ variants allow socketed upgrade in field-serviceable equipment. | Use Scenario: Storing digital test vectors in benchtop ATE systems requiring deterministic read latency and long-term data integrity. IC Role / Device Role / Timing Role: Static pattern memory accessed synchronously by FPGA sequencer with precise 15 ns timing margins. Use Value: Guaranteed 15 ns tAA across temperature ensures repeatable vector launch timing; low output skew (<3 ns tLZOE/tHZOE) minimizes setup uncertainty. |
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, 3.3V-only supply, 15 ns access, 44-pin TSOP II | Requires bus-width adaptation and voltage translation; higher density but incompatible pinout | Select only if 16-bit data path and 3.3V system integration are confirmed |
| ON Semiconductor MCM6295DW15 | 32K × 8, 5V, 15 ns, 28-pin SOJ - identical timing and voltage but obsolete with no Pb-free option | No RoHS compliance; limited distributor stock; no lifecycle support beyond 2012 | Use only for legacy repair; not recommended for new designs due to obsolescence risk |
Compared with IS61LV25616AL-15TQLI and MCM6295DW15, the CY7C199C-15VXCT offers verified RoHS-compliant TSOP I packaging, guaranteed 2.0V data retention, and active Cypress technical support - making it the preferred choice for new industrial designs requiring 5V compatibility and long-term supply stability.
Availability
CY7C199C-15VXCT is available at Aetrix Electronics and suitable for industrial PLC data buffering, medical instrumentation memory caching, and legacy microcontroller expansion memory requiring stable component supply across extended temperature and voltage ranges.
Supply support for CY7C199C-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) designs high-reliability memory and programmable solutions for industrial, automotive, and IoT applications.
The CY7C199C belongs to Cypress's legacy asynchronous SRAM product line, engineered specifically for robust 5V embedded systems needing deterministic timing, low-power deselected operation, and drop-in compatibility with MIL-STD-883 qualified components.
FAQ
Is CY7C199C-15VXCT compatible with 3.3V systems?
No. The CY7C199C-15VXCT is strictly a 5V device with VCC specification of 4.5V–5.5V. Its inputs require TTL-level thresholds (VIH ≥ 2.2V), and outputs drive 2.4V min at 4mA - it lacks 3.3V logic compatibility and will not operate reliably below 4.5V.
What is the maximum clock frequency supported for read/write cycles?
The CY7C199C-15VXCT is asynchronous and has no clock input. Maximum effective bus frequency is determined by tRC = 15 ns, yielding a theoretical upper limit of ~66.7 MHz for consecutive read cycles - but actual achievable rate depends on controller setup/hold timing and bus loading.
Does this part support battery backup operation?
Yes. With VCC reduced to 2.0V and CE held high, the device retains data while drawing ≤150 µA (ICCDR). This mode requires external circuitry to switch VCC to a backup source during main power loss and maintain CE assertion.
Can CY7C199C-15VXCT be used in place of CY7C199-15VXCT?
Yes. The "C" suffix denotes the revised version with enhanced data retention (2.0V vs. earlier 3.0V), improved ISB2 (10 µA vs. 30 µA), and updated process. Pinout, timing, and DC specs are backward-compatible; the "C" version is a direct, superior replacement.
CY7C199C-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
CY7C199C-15VXCT FAQ
1.How can I place an order for CY7C199C-15VXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199C-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 CY7C199C-15VXCT reliable?
The price and inventory of CY7C199C-15VXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199C-15VXCT is usually 5 days.
3.What payment methods are accepted for CY7C199C-15VXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199C-15VXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199C-15VXCT?
CY7C199C-15VXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199C-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 CY7C199C-15VXCT?
For technical support, including CY7C199C-15VXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199C-15VXCT requirements.
6.How does Aetrix verify that CY7C199C-15VXCT is sourced from the original manufacturer or authorized distributors?
All CY7C199C-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 CY7C199C-15VXCT meets industry standards.
7.What is the process for return or replacement of CY7C199C-15VXCT?
All CY7C199C-15VXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199C-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 CY7C199C-15VXCT part is unused and in its original packaging.
Return procedure for CY7C199C-15VXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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