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Infineon Technologies CY7C1399B-15VC
- Part No.:
- CY7C1399B-15VC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C1399B-15VC.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:3,967
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Product details
Overview
CY7C1399B-15VC from Cypress Semiconductor is a 256 Kbit (32K × 8) high-speed CMOS static RAM operating at 3.3 V, with 15 ns access time, 50 mA max operating 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 modules requiring fast random-access storage with deterministic timing.
For engineers reviewing the CY7C1399B-15VC datasheet, CY7C1399B-15VC pinout, CY7C1399B-15VC application, or CY7C1399B-15VC equivalent, key selection criteria include TTL/CMOS-compatible control timing (tRC = 15 ns, tHZCE = 7 ns), SOJ-28 package compatibility, 3.3V-only supply operation, and automatic power-down behavior under CE deassertion.
Technical Context
The CY7C1399B-15VC implements a synchronous, address-decoded 32K × 8 SRAM array using alpha-immune 6T cells. Its dual-control architecture uses active-low CE and OE for hierarchical enablement, while WE governs write direction-enabling precise bus arbitration in multi-chip memory systems.
It supports three distinct operational modes: read (CE↓, OE↓, WE↑), write (CE↓, WE↓), and automatic power-down (CE↑), with output drivers entering high-impedance state during deselect or OE↑. Timing is specified with CL = 30 pF and input transition ≤3 ns, ensuring compatibility with 3.3V LVTTL logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256 Kbit (32,768 × 8) - provides byte-wide data path for microcontroller peripherals without external data-width conversion |
| Access Time | 15 ns - enables direct interfacing with 66 MHz system buses without wait states |
| VCC Supply | 3.3 V ±300 mV - requires single low-noise LDO, no level-shifting needed for 3.3V I/O domains |
| Operating Current | 50 mA max - limits thermal load in dense PCB layouts; compatible with 1W board-level power budgets |
| Standby Current | 500 µA (CMOS inputs) - sustains battery-backed retention in low-power sleep modes |
| Package | 28-pin SOJ (V21), 300-mil width - industry-standard footprint for legacy socketed memory designs |
| Input Voltage Range | –0.3 V to VCC + 0.3 V - ensures robust noise margin against ground bounce on shared address/data buses |
Pinout & Package
The CY7C1399B-15VC is housed in a 28-pin plastic SOJ (Small Outline J-Lead) package, 300 mil wide, with gull-wing leads suitable for wave or reflow soldering. Pin numbering follows standard JEDEC SOJ orientation (pin 1 marked by notch or dot).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus accepting 0–32,767; latched internally on CE/WE transitions |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit tristatable I/O lines; direction controlled by WE and OE states |
| CE | Chip Enable | Active-low global select; initiates automatic power-down when HIGH |
| OE | Output Enable | Active-low output gate; overrides WE to force read mode or high-Z |
| WE | Write Enable | Active-low write strobe; determines data flow direction when CE is asserted |
| VCC | Power Supply | 3.3 V primary supply; decoupling required within 10 mm of pin 16 |
| GND | Ground Reference | Signal and power return; connected to pin 14 per SOJ pinout |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE Power-Down | Reduces ICC to 500 µA when CE is HIGH-eliminates need for external power-gating logic |
| Alpha-Immune 6T Cell | Ensures >10-year data retention under industrial temperature cycling without refresh |
| 3.3V-Only Operation | Removes requirement for dual-supply sequencing or voltage translators in modern low-voltage systems |
| SOJ & TSOP Packaging | SOJ-28 (V21) variant supports socket-based prototyping and field-replaceable memory modules |
| TTL/CMOS-Compatible Timing | tHZCE = 7 ns and tLZOE = 0 ns allow seamless integration with FPGA or ASIC memory controllers |
Applications
| Industrial PLC Memory Buffer | Network Interface Packet Buffer |
|---|---|
Use Scenario: Storing real-time I/O status and configuration registers in programmable logic controllers with cyclic scan intervals <20 ms. IC Role / Device Role / Timing Role: Byte-accessible scratchpad RAM holding volatile process variables; accessed via parallel bus at 66 MHz-equivalent timing. Use Value: 15 ns tRC eliminates wait-state insertion, maintaining deterministic scan cycle execution across temperature range –40°C to +85°C. | Use Scenario: Temporary storage of Ethernet frame payloads in switch fabric line cards before forwarding or classification. IC Role / Device Role / Timing Role: Dual-port accessible buffer supporting concurrent ingress/egress DMA bursts with independent CE/OE control. Use Value: Automatic CE power-down cuts idle power by >95%, critical for multi-port 1U switch thermal management. |
| Medical Imaging Control Module | Automotive ADAS Sensor Preprocessor |
Use Scenario: Holding calibration coefficients and real-time image histogram bins in ultrasound front-end processors. IC Role / Device Role / Timing Role: Low-noise, radiation-tolerant SRAM storing safety-critical parameters; operates in continuous read-modify-write loops. Use Value: Alpha-immune 6T cell design prevents soft errors in X-ray-rich environments without ECC overhead. | Use Scenario: Caching radar point-cloud metadata in vision processing units prior to DSP acceleration. IC Role / Device Role / Timing Role: High-reliability, fast-access buffer interfaced directly to automotive-grade MCU parallel memory bus. Use Value: SOJ-28 package meets AEC-Q200 vibration requirements; 3.3V operation aligns with ASIL-B power domain architecture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV25616AL-15TQLI | 16-bit bus width (256K × 16), 15 ns access, 3.3V, TSOP-44 package | Requires bus-width adaptation; higher density but incompatible pinout and control timing margins | Select only when 16-bit data path and space-constrained layout justify redesign effort |
| MT48LC4M16A2P-6A:G | Synchronous SDRAM, 64 Mbit, 143 MHz clock, 3.3V, TSOP-54 | Requires clock, command, and refresh circuitry; not drop-in compatible for asynchronous interfaces | Choose only for bandwidth-intensive applications where burst reads outweigh control complexity |
Compared with IS61LV25616AL-15TQLI and MT48LC4M16A2P-6A:G, the CY7C1399B-15VC offers true asynchronous operation, minimal external logic, and proven reliability in long-lifecycle industrial deployments-making it optimal for cost-sensitive, fixed-function embedded memory roles.
Availability
CY7C1399B-15VC is available at Aetrix Electronics and suitable for industrial PLC memory buffers, network interface packet buffers, and medical imaging control modules requiring stable component supply and long-term obsolescence management.
Supply support for CY7C1399B-15VC 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 logic solutions for industrial, automotive, and communications markets.
The CY7C1399B belongs to Cypress's legacy high-speed asynchronous SRAM product line, designed specifically for low-voltage, low-power cache and buffer applications in resource-constrained embedded systems.
FAQ
Does CY7C1399B-15VC support battery backup for data retention?
Yes-it retains data at VCC = 2.0 V with ICCDR ≤20 µA (commercial grade), enabling use with coin-cell backup circuits. The device enters data retention mode automatically when CE is deasserted and VCC remains ≥2.0 V, requiring no external control signals or firmware intervention.
Can CY7C1399B-15VC be operated at 2.5 V?
No-its absolute maximum rating allows VCC down to 3.0 V (±300 mV), and electrical specifications are guaranteed only at 3.3 V ±300 mV. Operation below 3.0 V violates datasheet conditions and may cause timing violations or data corruption.
What is the maximum capacitive load the CY7C1399B-15VC outputs can drive?
The outputs are characterized for CL = 30 pF in AC timing tests, and COUT is specified at 6 pF. Driving loads >30 pF risks violating tHZOE (6 ns) and tHZCE (7 ns) specifications; external bus transceivers are recommended for >50 pF traces or multi-drop configurations.
Is there a lead-free version of CY7C1399B-15VC?
Yes-the CY7C1399B-15VXC is the Pb-free variant in the same SOJ-28 (V21) package, with identical timing, voltage, and thermal specifications. It complies with RoHS Directive 2011/65/EU and is marked with "VXC" suffix and Pb-free logo on the package body.
CY7C1399B-15VC 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:
- 15ns
- Access Time:
- 15 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-15VC FAQ
1.How can I place an order for CY7C1399B-15VC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1399B-15VC 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-15VC reliable?
The price and inventory of CY7C1399B-15VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1399B-15VC is usually 5 days.
3.What payment methods are accepted for CY7C1399B-15VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1399B-15VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1399B-15VC?
CY7C1399B-15VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1399B-15VC 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-15VC?
For technical support, including CY7C1399B-15VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1399B-15VC requirements.
6.How does Aetrix verify that CY7C1399B-15VC is sourced from the original manufacturer or authorized distributors?
All CY7C1399B-15VC 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-15VC meets industry standards.
7.What is the process for return or replacement of CY7C1399B-15VC?
All CY7C1399B-15VC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1399B-15VC, 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-15VC part is unused and in its original packaging.
Return procedure for CY7C1399B-15VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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