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Infineon Technologies CY7C199C-12ZXC
- Part No.:
- CY7C199C-12ZXC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
CY7C199C-12ZXC.pdf
- Description:
- IC SRAM 256KBIT PAR 28TSOP I
- Quantity:
- Payment:
- Shipping:
Inventory:4,895
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Product details
Overview
CY7C199C-12ZXC from Cypress Semiconductor is a 256K-bit (32K × 8) asynchronous CMOS static RAM with 12 ns access time, 5.0V ±10% supply operation, TTL-compatible I/Os, and automatic CE-controlled power-down. It serves as a high-speed, low-power data buffer or working memory in microcontroller-based systems requiring deterministic read/write timing and reliable data retention down to 2.0V.
For engineers reviewing the CY7C199C-12ZXC datasheet, CY7C199C-12ZXC pinout, CY7C199C-12ZXC application, or CY7C199C-12ZXC equivalent, key selection criteria include access time consistency across temperature, CMOS standby current under deselected conditions, VCC operating margin, and compatibility with legacy 28-pin SOJ/DIP/TSOP I footprints in industrial control and instrumentation designs.
Technical Context
The CY7C199C-12ZXC implements a fully asynchronous interface with independent CE, OE, and WE controls-enabling flexible read/write sequencing without clock dependency. Its internal architecture includes address decoding logic, sense amplifiers, and a power-down circuit that activates automatically when CE remains HIGH, reducing ICC to ≤10 µA at VCC = 5.0V.
It supports three speed grades (12/15/20 ns), with this variant specified for 12 ns tRC and tAA. Data retention is guaranteed at VCC = 2.0V with ICCDR ≤150 µA, and all DC/AC parameters are validated over commercial (0°C to +70°C) and industrial (–40°C to +85°C) temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256 Kbit (32K × 8) - provides byte-wide data path compatible with 8-bit microcontrollers and peripheral interfaces. |
| Access Time | 12 ns - ensures sub-83 MHz bus operation with setup/hold margins for synchronous controllers. |
| VCC Range | 4.5 V to 5.5 V - supports standard 5V TTL/CMOS system rails with ±10% tolerance for line regulation variation. |
| Standby Current | 10 µA (ISB2, CMOS inputs) - enables ultra-low-power hold mode during processor sleep or idle states. |
| Data Retention Voltage | 2.0 V - maintains stored data during brown-out or backup-battery operation without refresh. |
| I/O Compatibility | TTL-input / TTL-output - eliminates level-shifting requirements when interfacing with legacy logic families. |
| Package Type | 28-pin SOJ (300-mil) - surface-mount footprint with gull-wing leads suitable for automated assembly and thermal reliability in industrial PCBs. |
Pinout & Package
Package: 28-pin Small Outline J-Lead (SOJ), 300-mil width, JEDEC MS-012AC compliant. Pin pitch: 1.27 mm. Body dimensions: 18.42 mm × 7.62 mm × 2.92 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus (32K locations); driven by MPU/MCU address lines with no latching required. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path; high-impedance when CE=HIGH or OE=HIGH, enabling bus sharing. |
| CE | Chip Enable | Active-LOW enable; initiates automatic power-down when deasserted, reducing ICC to µA-level. |
| OE | Output Enable | Active-LOW control for output drivers only; does not affect write operations or power state. |
| WE | Write Enable | Active-LOW signal controlling write cycle initiation; combined with CE to define valid write window. |
| VCC | Power Supply | +5.0V core supply; decoupling capacitor (0.1 µF) required within 10 mm of pin 28. |
| VSS | Ground | Signal and power return reference; connected to PCB ground plane for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| 12 ns Access Time | Guaranteed tAA and tRC ≤12 ns across full voltage/temperature range-enables direct interface with 8051, Z80, and 68K-family processors without wait states. |
| Automatic Power-down | Zero software overhead: CE deassertion triggers hardware power gating, cutting ICC from 85 mA to 10 µA without external control logic. |
| 2.0V Data Retention | Maintains valid contents during brown-out or battery-backup scenarios, eliminating need for external backup power management circuitry. |
| TTL-Compatible I/O | VIH = 2.2 V min and VOL = 0.4 V max ensure interoperability with 5V logic families without level translators or pull-up resistors. |
| Pb-Free Packaging Option | RoHS-compliant SOJ variant available (CY7C199C-12ZXC), supporting lead-free reflow profiles and environmental compliance for industrial OEMs. |
Applications
| Industrial PLC I/O Buffer | Medical Instrument Data Logger |
|---|---|
Use Scenario: Real-time acquisition of analog sensor readings in programmable logic controllers with cyclic scan execution. IC Role / Device Role / Timing Role: Asynchronous SRAM providing zero-wait-state scratchpad memory for firmware-managed input/output image tables. Use Value: 12 ns access ensures deterministic response within 100 µs scan cycles; 10 µA ISB2 enables energy-efficient sleep between scans. | Use Scenario: Continuous waveform capture from ECG or EEG front-ends in portable diagnostic devices. IC Role / Device Role / Timing Role: High-reliability data buffer storing digitized samples prior to USB or SD-card transfer. Use Value: 2.0V data retention preserves critical patient data during brief power interruptions; TTL I/O simplifies interface to ADC and microcontroller. |
| Avionics Display Controller Frame Buffer | Legacy Industrial HMI Terminal |
Use Scenario: Storing pixel data for monochrome LCD displays in cockpit display units with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: Byte-accessible frame buffer supporting partial screen updates via MPU burst reads. Use Value: SOJ package offers superior thermal resistance (ΘJA = 79 °C/W) vs. DIP; 12 ns timing aligns with display controller pixel clock timing budgets. | Use Scenario: Replacing obsolete SRAM in aging human-machine interface terminals using 8-bit Z80 or 8085 CPUs. IC Role / Device Role / Timing Role: Drop-in replacement for legacy 28-pin DIP SRAMs with identical pinout and timing behavior. Use Value: Pin-compatible with CY7C199-12V, CY7C199-12PC, and HM62256LP-12, enabling field upgrades without PCB redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar asynchronous SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV25616AL-12TQLI | 32K × 16 organization, 3.3V-only supply, 12 ns access, TSOP-44 package | Requires data bus width adaptation and voltage translation; unsuitable for 5V-only systems | Select only if migrating to 3.3V architecture and wider data path is acceptable. |
| CY7C199-12V | Same 32K × 8 organization and 12 ns speed, but offered in 28-pin DIP (not Pb-free) | Identical electrical behavior; differs only in package form factor and RoHS compliance | Choose CY7C199-12V for through-hole prototyping or legacy repair; CY7C199C-12ZXC for new SMT production. |
Compared with IS61LV25616AL-12TQLI and CY7C199-12V, the CY7C199C-12ZXC uniquely combines 5V operation, Pb-free SOJ packaging, and guaranteed 12 ns performance in a drop-in replaceable 28-pin footprint-making it optimal for industrial retrofits and new 5V embedded designs requiring regulatory compliance.
Availability
CY7C199C-12ZXC is available at Aetrix Electronics and suitable for industrial PLC I/O buffering, medical data logging, and avionics display frame storage requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for CY7C199C-12ZXC 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, PSoC, and interface solutions for industrial, automotive, and consumer applications.
The CY7C199C belongs to Cypress's legacy asynchronous SRAM product line, designed specifically for cost-sensitive, high-reliability 5V embedded systems where deterministic timing, low standby power, and long-lifecycle availability are critical.
FAQ
Is CY7C199C-12ZXC pin-compatible with CY7C199-12V?
Yes. Both share identical 28-pin SOJ pinout and signal assignments-including A0–A14, I/O0–I/O7, CE, OE, WE, VCC, and VSS. The only differences are package construction (SOJ vs. DIP) and RoHS compliance; electrical timing and DC characteristics are identical per datasheet Rev. *C.
What is the maximum operating temperature for industrial-grade operation?
The CY7C199C-12ZXC is rated for industrial temperature range: –40°C to +85°C ambient. This rating applies to all speed grades and package variants, including the SOJ version, and is validated per the "Operating Range" table on page 4 of datasheet 38-05408 Rev. *C.
Does automatic power-down require external circuitry or configuration?
No. Power-down is fully autonomous and triggered solely by CE remaining HIGH. No external control signals, registers, or initialization sequences are needed. When CE ≥ VCC – 0.3V and inputs are stable, ISB2 drops to ≤10 µA without any firmware or hardware intervention.
Can CY7C199C-12ZXC be used in battery-backed applications?
Yes. With guaranteed data retention at VCC = 2.0V and ICCDR ≤150 µA, it supports battery-backup operation using coin cells or supercapacitors. The device retains data indefinitely at 2.0V as long as CE remains asserted and ambient temperature stays within specification limits.
CY7C199C-12ZXC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm Width)
- Packaging:
- Bag
- 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
CY7C199C-12ZXC FAQ
1.How can I place an order for CY7C199C-12ZXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199C-12ZXC 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-12ZXC reliable?
The price and inventory of CY7C199C-12ZXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199C-12ZXC is usually 5 days.
3.What payment methods are accepted for CY7C199C-12ZXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199C-12ZXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199C-12ZXC?
CY7C199C-12ZXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199C-12ZXC 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-12ZXC?
For technical support, including CY7C199C-12ZXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199C-12ZXC requirements.
6.How does Aetrix verify that CY7C199C-12ZXC is sourced from the original manufacturer or authorized distributors?
All CY7C199C-12ZXC 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-12ZXC meets industry standards.
7.What is the process for return or replacement of CY7C199C-12ZXC?
All CY7C199C-12ZXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199C-12ZXC, 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-12ZXC part is unused and in its original packaging.
Return procedure for CY7C199C-12ZXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C199C-12ZXC Tags
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