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Infineon Technologies CY7C199CN-12ZXCT
- Part No.:
- CY7C199CN-12ZXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
CY7C199CN-12ZXCT.pdf
- Description:
- IC SRAM 256KBIT PAR 28TSOP I
- Quantity:
- Payment:
- Shipping:
Inventory:4,222
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Product details
Overview
CY7C199CN-12ZXCT from Cypress Semiconductor is a 256K-bit (32K × 8) asynchronous CMOS static RAM with 12 ns access time, 5.0V ±10% supply range, 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-12ZXCT datasheet, CY7C199CN-12ZXCT pinout, CY7C199CN-12ZXCT application, or CY7C199CN-12ZXCT equivalent, key selection criteria include access time consistency under varying VCC, low standby current (≤500 µA), data retention at 2.0V, and compatibility with legacy 28-pin TSOP I footprint designs.
Technical Context
The CY7C199CN-12ZXCT 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 by CE high, reducing ICC to ≤500 µA during deselect.
All timing parameters-including tRC (12 ns), tAA (12 ns), tACE (12 ns), and tPD (12 ns)-are guaranteed over full VCC (4.5V–5.5V) and temperature (0°C–70°C). Data retention is maintained at VCC = 2.0V with ICCDR ≤150 µA, enabling battery-backed operation without external retention circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8 bits - provides byte-wide data path compatible with 8-bit microcontrollers and legacy bus architectures |
| Access Time (tAA) | 12 ns - ensures sub-83 MHz synchronous interface compatibility when used with fast address setup |
| Supply Voltage Range | 4.5V to 5.5V - supports standard 5V logic rails with ±10% tolerance for industrial-grade stability |
| Standby Current (ISB2) | 500 µA max - enables low-power hold mode during processor sleep without external power gating |
| Data Retention Voltage | 2.0V - allows operation from backup coin cell or supercapacitor during main power loss |
| Operating Temperature | 0°C to 70°C - certified for commercial-grade embedded applications including instrumentation and peripherals |
| Input/Output Compatibility | TTL-compatible - eliminates level-shifting requirements when interfacing with 74-series or MCU GPIO |
Pinout & Package
Package: 28-pin TSOP I (8 mm × 13.4 mm), lead-free, surface-mount. Pin count and layout match JEDEC MO-147AC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus supporting full 32K-word addressing; driven directly by MPU address lines |
| IO0–IO7 | Bidirectional Data I/O | 8-bit parallel data path; high-impedance when OE or CE inactive, eliminating bus contention |
| CE | Chip Enable | Active-low global select; initiates automatic power-down when high, reducing ICC to ≤500 µA |
| OE | Output Enable | Active-low control of data bus drivers; enables read-only access without affecting write state |
| WE | Write Enable | Active-low write strobe; latches data on falling edge when CE is active and OE is high |
| VCC | Power Supply | +5.0V core supply; decoupling capacitor required within 10 mm of pin 7 per layout guidelines |
| VSS | Ground | Signal and power return; connected to PCB ground plane via pin 21 for low-noise operation |
Key Features
| Feature | Design Value |
|---|---|
| 12 ns access time with guaranteed timing | Meets strict cycle-time budgets in real-time controllers where memory latency directly impacts loop execution |
| Automatic CE-controlled power-down | Eliminates need for external power management ICs in battery-powered or energy-conscious systems |
| 2.0V data retention capability | Enables seamless transition to backup power without data loss-critical for nonvolatile configuration storage |
| TTL-compatible I/O levels | Direct connection to legacy 5V MCUs (e.g., 8051, PIC18F) without level translators or pull-up resistors |
| Pb-free 28-pin TSOP I package | Complies with RoHS Directive 2011/65/EU and supports automated SMT assembly with standard reflow profiles |
Applications
| Industrial PLC I/O Buffering | Medical Device Data Logging |
|---|---|
Use Scenario: Storing real-time sensor readings and control setpoints between MCU polling cycles in programmable logic controllers. IC Role / Device Role / Timing Role: Asynchronous SRAM providing zero-wait-state read/write access for deterministic I/O scan timing. Use Value: 12 ns access ensures <1 µs memory latency, enabling 10 kHz I/O update rates without CPU stall penalties. | Use Scenario: Capturing ECG waveform samples during brief power interruptions in portable diagnostic equipment. IC Role / Device Role / Timing Role: Backup-retentive memory holding critical patient data when main supply drops below 4.5V. Use Value: 2.0V data retention allows >10 s hold time from 3.3V backup rail, meeting IEC 60601-1 safety margin requirements. |
| Legacy Embedded Instrumentation | Automotive Diagnostic Interface Module |
Use Scenario: Replacing obsolete 27C256 EPROMs in aging test equipment where firmware updates require fast random-access rewrite. IC Role / Device Role / Timing Role: Drop-in SRAM replacement with identical 28-pin DIP/TSOP footprint and TTL-level signaling. Use Value: Pin- and timing-compatible with original design, avoiding PCB redesign while improving reliability over UV-erasable parts. | Use Scenario: Supporting ISO 9141-2 and KWP2000 protocol translation in OBD-II adapters with limited board space. IC Role / Device Role / Timing Role: Temporary buffer for CAN message framing and diagnostic response generation in microcontroller subsystems. Use Value: Low 500 µA standby current extends adapter battery life during vehicle ignition-off periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar asynchronous SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C4008-12TIN | 12 ns access, 5V-only (4.5–5.5V), ISB = 1 µA typical - lower standby but no 2.0V retention | Lacks data retention below 3.0V; unsuitable for battery-backup scenarios | Select when ultra-low quiescent current is prioritized over retention voltage margin |
| IS61LV25616AL-12TQLI | 12 ns, 3.3V core (2.7–3.6V), 256K × 16 organization - wider data bus, different voltage domain | Requires level shifting for 5V systems; incompatible with byte-wide 8-bit buses | Choose only for new 3.3V designs needing higher bandwidth via 16-bit interface |
Compared with AS6C4008-12TIN and IS61LV25616AL-12TQLI, the CY7C199CN-12ZXCT uniquely balances 5V TTL compatibility, 12 ns speed, and 2.0V data retention-making it irreplaceable in legacy 5V systems requiring robust power-fail resilience without voltage translation.
Availability
CY7C199CN-12ZXCT is available at Aetrix Electronics and suitable for industrial PLC I/O buffering, medical device data logging, and legacy embedded instrumentation requiring stable component supply and long-term obsolescence support.
Supply support for CY7C199CN-12ZXCT 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 specializing in memory, microcontrollers, and programmable system-on-chip solutions for industrial, automotive, and consumer markets.
The CY7C199CN belongs to Cypress's legacy asynchronous SRAM product line, designed specifically for drop-in replacement of obsolete NMOS and early CMOS memories in cost-sensitive, high-reliability 5V embedded systems.
FAQ
What is the maximum operating frequency supported by CY7C199CN-12ZXCT?
The CY7C199CN-12ZXCT does not operate at a clock frequency-it is an asynchronous SRAM. Its maximum effective throughput is governed by tRC = 12 ns, yielding a theoretical upper limit of ~83 MHz for consecutive read/write cycles. Actual system speed depends on MPU bus timing, address setup/hold, and external wait-state logic.
Does CY7C199CN-12ZXCT support battery backup operation?
Yes. The device guarantees data retention down to VCC = 2.0V with ICCDR ≤150 µA, enabling direct connection to a lithium coin cell or supercapacitor for hold-mode operation during main power loss-no external controller or switch is required.
Can CY7C199CN-12ZXCT be used in place of CY7C199-12ZC?
Yes. CY7C199CN-12ZXCT is the Pb-free, TSOP I packaged variant of CY7C199-12ZC. Both share identical AC/DC specifications, pinout, and timing. The "N" suffix denotes lead-free compliance; "XCT" confirms TSOP I packaging per JEDEC MO-147AC.
Is thermal derating required for continuous operation at 70°C ambient?
No additional derating is required. The device is characterized across 0°C to 70°C with full parameter guarantees, including ΘJA = 88.6°C/W for TSOP I. Standard 2-layer PCB layout with adequate copper pour meets thermal requirements without heatsinking.
CY7C199CN-12ZXCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm 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:
- 12ns
- Access Time:
- 12 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
CY7C199CN-12ZXCT FAQ
1.How can I place an order for CY7C199CN-12ZXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199CN-12ZXCT 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-12ZXCT reliable?
The price and inventory of CY7C199CN-12ZXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199CN-12ZXCT is usually 5 days.
3.What payment methods are accepted for CY7C199CN-12ZXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199CN-12ZXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199CN-12ZXCT?
CY7C199CN-12ZXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199CN-12ZXCT 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-12ZXCT?
For technical support, including CY7C199CN-12ZXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199CN-12ZXCT requirements.
6.How does Aetrix verify that CY7C199CN-12ZXCT is sourced from the original manufacturer or authorized distributors?
All CY7C199CN-12ZXCT 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-12ZXCT meets industry standards.
7.What is the process for return or replacement of CY7C199CN-12ZXCT?
All CY7C199CN-12ZXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199CN-12ZXCT, 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-12ZXCT part is unused and in its original packaging.
Return procedure for CY7C199CN-12ZXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C199CN-12ZXCT Tags
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