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Infineon Technologies CY7C1399B-12VC
- Part No.:
- CY7C1399B-12VC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C1399B-12VC.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,452
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Product details
Overview
CY7C1399B-12VC from Cypress Semiconductor is a 256 Kbit (32K × 8) high-speed CMOS static RAM operating at 3.3 V, featuring 12 ns access time, 55 mA max active current, and automatic CE-controlled power-down reducing standby current to 500 µA. It serves as low-voltage cache memory in embedded controllers and networking interface buffers.
For engineers reviewing the CY7C1399B-12VC datasheet, CY7C1399B-12VC pinout, CY7C1399B-12VC application, or CY7C1399B-12VC equivalent, key selection criteria include TTL/CMOS-compatible control timing, SOJ/TSOP package compatibility, 3.3V-only operation, and automatic power-down behavior under CE deassertion.
Technical Context
The CY7C1399B-12VC implements a synchronous 32K × 8 SRAM array with fully decoded address inputs (A0–A14), three-state bidirectional I/Os (I/O0–I/O7), and dual-active-low control architecture (CE, OE, WE). Its 6T alpha-immune cell enables reliable operation in industrial environments without refresh circuitry.
Timing is governed by overlapping CE/WE assertions for write cycles and CE/OE coordination for reads; tRC = 12 ns defines minimum read cycle duration, while tPD = 12 ns specifies CE HIGH-to-power-down latency. Standby current remains stable across input voltage transitions due to CMOS input threshold design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256 Kbit (32,768 × 8 bits); supports byte-wide data bus interfacing without external multiplexing |
| Access Time | 12 ns; guarantees valid data on I/O pins within 12 ns after CE/OE assertion, enabling 83 MHz burst read capability |
| VCC Supply | 3.3 V ± 300 mV; single-rail operation eliminates need for dual-voltage regulation in 3.3V systems |
| Active Current | 55 mA max at fMAX; corresponds to ~216 mW typical active power, suitable for thermally constrained PCB layouts |
| Standby Current | 500 µA max (ISB2, CMOS inputs); enables >95% power reduction during idle periods without external gating |
| Operating Temp | 0°C to +70°C (Commercial); validated for use in office equipment, printers, and non-automotive industrial controls |
| Package | 28-pin SOJ (V21), 300-mil width; compatible with legacy socketed SRAM footprints and wave-solder reflow profiles |
Pinout & Package
Package: 28-pin Plastic Small Outline J-Lead (SOJ), 300-mil body width, JEDEC MS-024AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit unidirectional address bus; fully decoded to select one of 32,768 memory locations |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit tristatable I/O lines; high-impedance when CE HIGH or OE HIGH and WE HIGH |
| CE | Chip Enable (active LOW) | Primary device select; initiates automatic power-down when HIGH, disabling internal array and drivers |
| OE | Output Enable (active LOW) | Controls output buffer enable; must be LOW with CE LOW to place data on I/O pins during read |
| WE | Write Enable (active LOW) | Controls write/read mode; LOW with CE LOW enables write; HIGH with CE/OE LOW enables read |
| VCC | Power Supply | 3.3 V supply pin; decoupling capacitor required within 10 mm for stable 12 ns timing compliance |
| GND | Ground Reference | Signal and power ground; shared return path for all I/O and internal logic; requires low-inductance connection |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | 3.3 V only - eliminates level-shifting requirements in modern microcontroller and FPGA interfaces |
| Automatic Power-Down | CE-driven standby mode draws ≤500 µA without external control logic or sleep-state software intervention |
| High-Speed Timing | 12 ns tRC and tACE ensure compatibility with 83 MHz bus clocks and fast microprocessor cache cycles |
| Alpha-Immune Cell | 6T SRAM cell design qualified for immunity to soft errors in terrestrial industrial applications |
| SOJ/TSOP Dual Packaging | Pin-compatible footprint between SOJ (V21) and TSOP (Z28) allows layout reuse across density and thermal variants |
Applications
| Network Interface Buffer | Industrial PLC Data Cache |
|---|---|
|
Use Scenario: Storing packet headers and descriptor tables in Ethernet MAC controllers with burst DMA access. IC Role / Device Role / Timing Role: Byte-wide asynchronous SRAM providing zero-wait-state buffering between PHY and controller logic. Use Value: 12 ns access enables full 100 Mbps line-rate packet processing without pipeline stalls. |
Use Scenario: Holding real-time I/O status and configuration registers in programmable logic controllers with deterministic scan cycles. IC Role / Device Role / Timing Role: Non-refreshing memory storing volatile process variables accessible within fixed 1 ms scan windows. Use Value: Automatic CE power-down reduces average system power by 320 µW per cycle during idle polling intervals. |
| Printer Engine Controller | Medical Imaging Display Buffer |
|
Use Scenario: Temporary raster line storage in laser printer engines where print head timing demands tight data availability windows. IC Role / Device Role / Timing Role: High-reliability SRAM holding decompressed bitmap segments prior to laser modulation. Use Value: 6T cell design ensures bit integrity over 10-year service life in thermally cycled office environments. |
Use Scenario: Frame buffering for grayscale ultrasound display subsystems requiring flicker-free 60 Hz rendering. IC Role / Device Role / Timing Role: Low-noise, single-supply memory supporting parallel 8-bit pixel fetches synchronized to video timing generators. Use Value: 3.3 V operation simplifies power tree integration with medical-grade DC/DC converters meeting IEC 60601-1 creepage requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISSI IS61LV25616AL-12TLI | 16-bit bus (256K × 16), 12 ns, 3.3 V; higher density but wider interface | Requires PCB redesign for 16-bit data path; not drop-in for 8-bit systems | Select only if migrating to wider bus architecture and needing 512 Kbyte capacity |
| ON Semiconductor MC68HC11F1CFN | Microcontroller with integrated 512-byte RAM; no external SRAM interface | Not a memory component - lacks address/data bus, CE/OE/WE controls, and standalone operation | Not functionally substitutable; intended for SoC consolidation, not memory expansion |
Compared with IS61LV25616AL-12TLI and MC68HC11F1CFN, the CY7C1399B-12VC uniquely delivers pin-compatible 8-bit SRAM functionality with verified 12 ns timing, automatic power-down, and SOJ packaging - making it irreplaceable in legacy 8-bit bus designs requiring minimal BOM change.
Availability
CY7C1399B-12VC is available at Aetrix Electronics and suitable for network interface buffers, industrial PLC data caches, printer engine controllers, and medical imaging display buffers requiring stable component supply across multi-year production cycles.
Supply support for CY7C1399B-12VC 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 USB solutions for industrial, automotive, and consumer electronics.
The CY7C1399B belongs to Cypress's legacy high-speed CMOS SRAM product line, designed specifically for low-voltage, low-power cache and buffer applications in 3.3 V system architectures.
FAQ
Is CY7C1399B-12VC compatible with 5 V logic interfaces?
No. The CY7C1399B-12VC operates exclusively at 3.3 V and is not 5 V tolerant. Input voltages must remain within –0.3 V to VCC + 0.3 V (≤3.6 V), and applying 5 V signals to any pin risks permanent damage. Level-shifting circuitry is required for interfacing with 5 V microcontrollers or FPGAs.
Does CY7C1399B-12VC require an external clock signal?
No. It is an asynchronous SRAM with no clock input. All operations are controlled by edge- and level-sensitive control signals (CE, OE, WE) and address stability windows defined in the timing specifications - eliminating clock distribution complexity and jitter sensitivity.
What is the maximum data retention voltage for CY7C1399B-12VC?
The guaranteed data retention voltage is 2.0 V (VDR), with retention current ≤20 µA at that voltage. This allows battery-backed hold operation during main power loss, provided VCC is maintained ≥2.0 V and CE remains asserted HIGH to enter retention mode.
Can CY7C1399B-12VC be used in industrial temperature range applications?
No. The -12VC suffix denotes Commercial grade (0°C to +70°C). For industrial operation (–40°C to +85°C), the correct part is CY7C1399B-12VI (SOJ) or CY7C1399B-12ZI (TSOP), both specified across the extended temperature range and tested for parameter compliance at extremes.
CY7C1399B-12VC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 28-BSOJ (0.300", 7.62mm Width)
- Packaging:
- Tube
- 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:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOJ
CY7C1399B-12VC FAQ
1.How can I place an order for CY7C1399B-12VC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1399B-12VC 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 CY7C1399B-12VC reliable?
The price and inventory of CY7C1399B-12VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1399B-12VC is usually 5 days.
3.What payment methods are accepted for CY7C1399B-12VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1399B-12VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1399B-12VC?
CY7C1399B-12VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1399B-12VC 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 CY7C1399B-12VC?
For technical support, including CY7C1399B-12VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1399B-12VC requirements.
6.How does Aetrix verify that CY7C1399B-12VC is sourced from the original manufacturer or authorized distributors?
All CY7C1399B-12VC 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 CY7C1399B-12VC meets industry standards.
7.What is the process for return or replacement of CY7C1399B-12VC?
All CY7C1399B-12VC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1399B-12VC, 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 CY7C1399B-12VC part is unused and in its original packaging.
Return procedure for CY7C1399B-12VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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