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Infineon Technologies CY7C1399BN-12ZXCT
- Part No.:
- CY7C1399BN-12ZXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
CY7C1399BN-12ZXCT.pdf
- Description:
- IC SRAM 256KBIT PAR 28TSOP I
- Quantity:
- Payment:
- Shipping:
Inventory:4,603
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Product details
Overview
CY7C1399BN-12ZXCT from Cypress Semiconductor is a 256-Kbit (32 K × 8) asynchronous CMOS static RAM with 3.3 V single-supply operation, 12 ns access time, industrial temperature range (–40 °C to +85 °C), and automatic CE-controlled power-down mode. It serves as cache or buffer memory in embedded controllers, network interface cards, and real-time data acquisition systems requiring deterministic read/write timing and low standby current.
For engineers reviewing the CY7C1399BN-12ZXCT datasheet, CY7C1399BN-12ZXCT pinout, CY7C1399BN-12ZXCT application, or CY7C1399BN-12ZXCT equivalent, key selection criteria include 12 ns read cycle time, 55 mA max active current, 500 µA max CMOS standby current, tristate I/O drivers, and compatibility with 28-pin TSOP-I and SOJ packages.
Technical Context
The CY7C1399BN-12ZXCT implements a 32,768 × 8-bit memory array using low-power alpha-immune 6T SRAM cells. Its control logic supports independent chip enable (CE), output enable (OE), and write enable (WE) signals with TTL/CMOS-compatible input thresholds and full tristate output control.
Timing behavior is defined by overlapping CE/WE assertion for writes and CE/OE assertion for reads, with guaranteed tRC = 12 ns, tAA = 12 ns, and tPD = 12 ns power-down entry. The device enters automatic low-power mode when CE is deasserted, reducing ICC to ≤500 µA under CMOS input conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 256 Kbit (32 K × 8) - supports byte-wide data bus interfaces without external multiplexing |
| Access Time | 12 ns - enables direct interfacing with 80 MHz microcontrollers without wait states |
| Supply Voltage | 3.3 V ±300 mV - compatible with modern low-voltage logic families and LDO-regulated systems |
| Active Current | 55 mA max - limits thermal load in compact PCB layouts with multiple memory devices |
| Standby Current | 500 µA max (CMOS inputs) - sustains battery-backed operation for >100 hours at 3.3 V |
| Operating Temp | –40 °C to +85 °C - qualified for industrial control and automotive-A environments |
| Data Retention VCC | 2.0 V min - preserves contents during brown-out or controlled power sequencing |
Pinout & Package
The CY7C1399BN-12ZXCT is packaged in a 28-pin TSOP-I (Type I) with 0.5 mm pitch, 8.1 mm × 13.4 mm body, and gull-wing leads. Pin assignment matches JEDEC MO-141AC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus supporting full 32 K-word decoding; no internal latching |
| I/O0–I/O7 | Bidirectional Data Bus | Tristate CMOS I/Os with 4 mA sink / 2 mA source drive; high-impedance when CE or OE inactive |
| CE | Chip Enable (active LOW) | Primary device select; initiates automatic power-down when HIGH and all inputs stable |
| OE | Output Enable (active LOW) | Controls output driver enable independently of CE; allows read-modify-write cycles |
| WE | Write Enable (active LOW) | Directly controls write operation; rising edge terminates write regardless of CE state |
| VCC | Power Supply | 3.3 V supply pin; decoupling required within 10 mm of pin per JEDEC guidelines |
| GND | Ground Reference | Signal and power return; must be connected to solid ground plane for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE Power-Down | Reduces ICC to ≤500 µA without external control logic or sleep-mode registers |
| Low-Power 6T Cell | Alpha-radiation immune design ensures data integrity in industrial and transportation environments |
| Tristate Output Drivers | Eliminates bus contention in shared-memory architectures with multiple masters |
| Single 3.3 V Supply | Removes need for dual-voltage regulation or level-shifting circuitry |
| TSOP-I and SOJ Options | Enables drop-in replacement across board revisions using industry-standard footprints |
Applications
| Industrial PLC Memory Buffer | Network Interface Card Cache |
|---|---|
Use Scenario: Storing real-time I/O status and configuration registers in programmable logic controllers with deterministic scan cycles. IC Role / Device Role / Timing Role: Asynchronous byte-wide SRAM providing zero-wait-state access for CPU and FPGA-based control engines. Use Value: 12 ns tRC ensures sub-microsecond register updates, enabling 100+ kHz I/O update rates without pipeline stalls. | Use Scenario: Caching packet descriptors and transmit/receive buffers in 10/100 Mbps Ethernet NICs with ARM9 or MIPS-based MAC processors. IC Role / Device Role / Timing Role: Shared memory resource accessed concurrently by DMA controller and host CPU via CE/OE/WE arbitration. Use Value: Tristate I/O and independent OE allow simultaneous CPU reads and DMA writes without external bus transceivers. |
| Automotive Infotainment Display Buffer | Medical Imaging Data FIFO |
Use Scenario: Holding frame metadata and partial pixel buffers in automotive head-unit displays operating across –40 °C to +85 °C. IC Role / Device Role / Timing Role: Temperature-hardened SRAM serving as display list buffer between GPU and timing controller. Use Value: Automotive-A qualification and 2.0 V data retention guarantee uninterrupted operation during cold-cranking voltage dips. | Use Scenario: Capturing raw sensor data from ultrasound or X-ray detectors before compression and transmission to host PC. IC Role / Device Role / Timing Role: High-reliability FIFO buffer accepting bursty ADC streams at up to 20 MSPS with deterministic latency. Use Value: 55 mA active current and 500 µA standby support thermally constrained portable imaging enclosures with battery backup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV25616AL-12TLI | 32 K × 16 organization, 12 ns access, 3.3 V, 28-pin TSOP-I | Provides 16-bit data bus; requires redesign of address/data routing for byte-wide systems | Select only if system architecture supports wider data path and higher density is prioritized over pin compatibility |
| AS6C4008-12ZIN | 512 Kbit (64 K × 8), 12 ns, 3.3 V, 28-pin TSOP-I, 1 µA standby | Double memory depth; higher standby current spec but lower typical leakage | Prefer for new designs needing future scalability; not drop-in due to different address pin count (A0–A15) |
Compared with IS61LV25616AL-12TLI and AS6C4008-12ZIN, the CY7C1399BN-12ZXCT offers exact 32 K × 8 alignment, proven industrial temperature reliability, and minimal board-level change requirements for legacy 8-bit bus systems.
Availability
CY7C1399BN-12ZXCT is available at Aetrix Electronics and suitable for industrial PLC memory buffers, network interface card caches, and automotive infotainment display buffers requiring stable component supply and long-term lifecycle support.
Supply support for CY7C1399BN-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, designs high-reliability memory and programmable solutions for industrial, automotive, and communications markets.
The CY7C1399BN belongs to Cypress's legacy parallel SRAM product line, engineered for deterministic timing, low-voltage operation, and robustness in mission-critical embedded memory subsystems.
FAQ
What is the maximum clock frequency supported by CY7C1399BN-12ZXCT?
The CY7C1399BN-12ZXCT is an asynchronous SRAM and does not use a clock signal. Its performance is governed by timing parameters including tRC = 12 ns, meaning it supports effective bus cycles up to approximately 83 MHz when interfaced with controllers that meet setup/hold requirements. No internal clock circuitry is present.
Does CY7C1399BN-12ZXCT support battery backup operation?
Yes - the device retains data down to VCC = 2.0 V and draws ≤20 µA during data retention mode (ICC_DR), making it suitable for battery-backed applications such as RTC memory or configuration storage. External battery switchover circuitry must ensure VCC remains ≥2.0 V during main supply loss.
Can CY7C1399BN-12ZXCT be used with 5 V logic interfaces?
No - the CY7C1399BN-12ZXCT is strictly a 3.3 V device. Input voltages exceeding VCC + 0.3 V (i.e., >3.6 V) may damage the part. Level translation is required for interfacing with 5 V microcontrollers or FPGAs; TI SN74AVC4T245 or similar dual-supply translators are recommended.
Is the TSOP-I package of CY7C1399BN-12ZXCT RoHS compliant?
Yes - the -ZXCT suffix denotes a lead-free, RoHS-compliant 28-pin TSOP-I package with matte tin lead finish, per Cypress's ordering code definitions and IPC/JEDEC J-STD-609A standard. Full compliance documentation is available under Infineon's product change notifications for legacy Cypress parts.
CY7C1399BN-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:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP I
CY7C1399BN-12ZXCT FAQ
1.How can I place an order for CY7C1399BN-12ZXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1399BN-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 CY7C1399BN-12ZXCT reliable?
The price and inventory of CY7C1399BN-12ZXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1399BN-12ZXCT is usually 5 days.
3.What payment methods are accepted for CY7C1399BN-12ZXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1399BN-12ZXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1399BN-12ZXCT?
CY7C1399BN-12ZXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1399BN-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 CY7C1399BN-12ZXCT?
For technical support, including CY7C1399BN-12ZXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1399BN-12ZXCT requirements.
6.How does Aetrix verify that CY7C1399BN-12ZXCT is sourced from the original manufacturer or authorized distributors?
All CY7C1399BN-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 CY7C1399BN-12ZXCT meets industry standards.
7.What is the process for return or replacement of CY7C1399BN-12ZXCT?
All CY7C1399BN-12ZXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1399BN-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 CY7C1399BN-12ZXCT part is unused and in its original packaging.
Return procedure for CY7C1399BN-12ZXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C1399BN-12ZXCT Tags
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