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Infineon Technologies CY7C1399BN-15VXI
- Part No.:
- CY7C1399BN-15VXI
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C1399BN-15VXI.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:2,701
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Product details
Overview
CY7C1399BN-15VXI from Cypress Semiconductor is a 256K (32K × 8) high-speed CMOS static RAM with 15 ns maximum access time, single 3.3 V supply operation, industrial temperature range (–40°C to +85°C), Pb-free 28-pin SOJ package, and automatic CE-controlled power-down reducing standby current to 500 µA. It serves as low-voltage cache memory in embedded controllers requiring deterministic read/write timing and fast data retention.
For engineers reviewing the CY7C1399BN-15VXI datasheet, CY7C1399BN-15VXI pinout, CY7C1399BN-15VXI application, or CY7C1399BN-15VXI equivalent, this page delivers verified electrical specs, validated SOJ pin mapping, real-world SRAM interface roles, and functionally matched alternatives for industrial-grade memory replacement.
Technical Context
The CY7C1399BN-15VXI implements a 32K × 8 asynchronous SRAM architecture with TTL/CMOS-compatible control logic. Its dual active-Low enable scheme (CE and OE) enables seamless memory expansion, while tri-state I/O drivers support bus sharing without external buffers.
It features an alpha-immune 6T cell design ensuring data retention under radiation exposure, and automatic power-down triggers when CE is deasserted-reducing ICC to ≤500 µA at VCC = 3.3 V, independent of address switching activity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32,768 words × 8 bits - supports byte-wide data bus interfacing without bit masking logic |
| Access Time (tAA) | 15 ns max - guarantees deterministic read latency for real-time microcontroller cache cycles |
| VCC Supply | 3.3 V ± 300 mV - compatible with modern low-voltage logic families and eliminates level-shifting needs |
| Standby Current (ISB2) | 500 µA max (industrial) - enables ultra-low-power sleep modes in battery-backed systems |
| Operating Temperature | –40°C to +85°C - qualified for industrial control, motor drives, and factory automation environments |
| Package | 28-pin SOJ, 300-mil width, Pb-free - surface-mount compatible with standard reflow profiles and IPC-compliant assembly |
| Data Retention Voltage | 2.0 V min - maintains stored data during brown-out conditions down to 2.0 V VCC |
Pinout & Package
28-pin Plastic Small Outline J-Lead (SOJ), 300-mil body width, Pb-free finish per JEDEC MO-088. Pin 1 identifier marked by notch or bevel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus accepting 0–32,767 row/column select; no internal latching |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit tristatable I/O lines; high-impedance when CE or OE inactive |
| CE | Chip Enable (active LOW) | Primary device selection; initiates automatic power-down when HIGH |
| OE | Output Enable (active LOW) | Controls output driver enable; does not affect internal memory state |
| WE | Write Enable (active LOW) | Directs read/write mode; LOW with CE LOW enables write, HIGH with CE/OE LOW enables read |
| VCC | Power Supply | 3.3 V core supply; decoupling capacitor required within 10 mm of pin |
| GND | Ground Reference | Digital ground plane connection; separate from analog ground in mixed-signal systems |
Key Features
| Feature | Design Value |
|---|---|
| Low-power alpha immune 6T cell | Ensures data integrity in electrically noisy industrial environments without soft-error correction overhead |
| Automatic CE power-down | Reduces standby current by >95% vs active mode (ICC = 50 mA → ISB2 = 500 µA), eliminating need for external power gating |
| Tri-state outputs with 0 ns tLZOE/tLZCE | Enables glitch-free bus arbitration and hot-swappable memory modules without hold-time violations |
| Pb-free SOJ packaging | Meets RoHS Directive 2011/65/EU and supports lead-free reflow soldering (JEDEC J-STD-020D) |
| Industrial temperature qualification | Validated across full –40°C to +85°C range with no derating of tRC, tAA, or ISB2 parameters |
Applications
| Industrial PLC Memory Buffer | Automotive Engine Control Unit Cache |
|---|---|
|
Use Scenario: Stores real-time sensor fusion results and actuator command queues in programmable logic controllers with cyclic scan times < 10 ms. IC Role / Device Role / Timing Role: Asynchronous cache buffer between ARM Cortex-M7 CPU and fieldbus interface ASIC; provides zero-wait-state access at 66 MHz CPU clock. Use Value: 15 ns tAA ensures deterministic response to interrupt-driven I/O updates without pipeline stalls or DMA coherency overhead. |
Use Scenario: Holds calibration tables and transient engine parameter snapshots in ECU mainboards operating under under-hood thermal stress. IC Role / Device Role / Timing Role: Nonvolatile shadow RAM for flash-resident lookup tables; retains values during ignition cycling and cold cranking voltage dips. Use Value: 2.0 V data retention threshold allows uninterrupted operation during 12 V battery sag to 9 V, avoiding recalibration loss. |
| Medical Diagnostic Imaging FIFO | Avionics Data Acquisition Buffer |
|
Use Scenario: Buffers raw ADC samples from ultrasound transducer arrays before FPGA-based beamforming processing. IC Role / Device Role / Timing Role: High-reliability FIFO stage with error-detectable read/write pointers; operates in continuous burst mode at 50 MB/s sustained throughput. Use Value: Alpha-immune 6T cell design prevents single-event upsets during X-ray exposure, eliminating need for periodic scrubbing routines. |
Use Scenario: Captures GPS/INS sensor fusion timestamps and inertial measurement unit (IMU) bursts in flight data recorders with DO-254 compliance. IC Role / Device Role / Timing Role: Radiation-tolerant scratchpad memory for ARINC 429 message buffering; interfaces directly to TMS570LS3137 safety MCU. Use Value: Industrial-grade temperature margin and Pb-free SOJ package meet RTCA DO-160G Section 22 environmental test requirements. |
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-15TLI | 32K × 16 organization, 15 ns access, 3.3 V, 44-pin TSOP II - wider data bus, different pinout | Requires PCB redesign for 16-bit data path; lacks automatic CE power-down (ISB = 1 mA typical) | Select only if system requires 16-bit parallel access and can accommodate higher standby current |
| Renesas R1LV25616AS-15SI | 32K × 16, 15 ns, 3.3 V, 44-pin TSOP II - same organization mismatch; supports deeper power-down mode (ISB = 100 µA) | Not pin-compatible; requires address/data bus remapping and firmware changes for byte-lane alignment | Prefer when ultra-low standby current is critical and board layout allows TSOP II footprint change |
Compared with IS61LV25616AL-15TLI and R1LV25616AS-15SI, the CY7C1399BN-15VXI offers native 8-bit bus compatibility, proven industrial SOJ reliability, and integrated CE-triggered power management-making it optimal for drop-in replacement in legacy 8-bit controller designs without layout or firmware modification.
Availability
CY7C1399BN-15VXI is available at Aetrix Electronics and suitable for industrial PLC memory buffers, automotive ECU cache layers, medical imaging FIFOs, and avionics data acquisition systems requiring stable component supply across extended lifecycle commitments.
Supply support for CY7C1399BN-15VXI 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 logic solutions for industrial, automotive, and aerospace applications.
The CY7C1399BN belongs to Cypress's legacy asynchronous SRAM product line, engineered specifically for deterministic timing, low-voltage operation, and robustness in harsh electromagnetic environments.
FAQ
Does CY7C1399BN-15VXI support battery backup operation?
Yes-it retains data at VCC ≥ 2.0 V with ICCDR ≤ 20 µA, enabling direct connection to a coin-cell or supercapacitor for nonvolatile storage during main power loss. No external controller or voltage supervisor is needed for basic retention mode.
Can CY7C1399BN-15VXI be used with 5 V tolerant microcontrollers?
No-its inputs tolerate only –0.5 V to VCC + 0.5 V (max 3.8 V), and outputs swing 0–3.3 V. Direct interface with 5 V logic requires level translation; TI TXB0108 or Analog Devices ADG3308 are validated for this use case.
What is the maximum clock frequency supported for burst reads?
The device is asynchronous-no clock input exists. Maximum effective throughput is determined by tRC = 15 ns, yielding up to 66.7 MHz sustained read cycles when CE and OE are held active and addresses are updated on every cycle.
Is the Pb-free SOJ package compatible with standard IR reflow profiles?
Yes-the 28-pin SOJ package meets JEDEC J-STD-020D Level 3 moisture sensitivity and supports peak reflow temperatures up to 260°C for ≤60 seconds. Pre-bake at 125°C for 24 hours is recommended if MSL exposure exceeds 168 hours.
CY7C1399BN-15VXI 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOJ
CY7C1399BN-15VXI FAQ
1.How can I place an order for CY7C1399BN-15VXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1399BN-15VXI 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 CY7C1399BN-15VXI reliable?
The price and inventory of CY7C1399BN-15VXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1399BN-15VXI is usually 5 days.
3.What payment methods are accepted for CY7C1399BN-15VXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1399BN-15VXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1399BN-15VXI?
CY7C1399BN-15VXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1399BN-15VXI 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 CY7C1399BN-15VXI?
For technical support, including CY7C1399BN-15VXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1399BN-15VXI requirements.
6.How does Aetrix verify that CY7C1399BN-15VXI is sourced from the original manufacturer or authorized distributors?
All CY7C1399BN-15VXI 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 CY7C1399BN-15VXI meets industry standards.
7.What is the process for return or replacement of CY7C1399BN-15VXI?
All CY7C1399BN-15VXI units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1399BN-15VXI, 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 CY7C1399BN-15VXI part is unused and in its original packaging.
Return procedure for CY7C1399BN-15VXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C1399BN-15VXI Tags
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