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Infineon Technologies CY7C1399B-15ZC
- Part No.:
- CY7C1399B-15ZC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
CY7C1399B-15ZC.pdf
- Description:
- IC SRAM 256KBIT PAR 28TSOP I
- Quantity:
- Payment:
- Shipping:
Inventory:1,157
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Product details
Overview
CY7C1399B-15ZC 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 where deterministic timing and TTL/CMOS-compatible control signaling are required.
For engineers reviewing the CY7C1399B-15ZC datasheet, CY7C1399B-15ZC pinout, CY7C1399B-15ZC application, or CY7C1399B-15ZC equivalent, this page delivers verified package mapping (28-pin TSOP Type I), confirmed address/data bus configuration (A0–A14, I/O0–I/O7), functional truth table behavior, and validated alternatives for SRAM replacement in industrial-grade memory subsystems.
Technical Context
The CY7C1399B-15ZC implements a fully decoded 32K × 8 asynchronous SRAM array using low-power alpha-immune 6T cells, supporting independent read/write cycles via separate CE, OE, and WE controls. Its three-state bidirectional I/O drivers and automatic power-down mode activate when CE is HIGH, enabling seamless integration into multi-chip memory buses without external isolation logic.
Timing is defined by overlapping CE and WE assertions for write operations, with data valid windows referenced to CE LOW (tACE = 15 ns) and OE LOW (tDOE = 6 ns). The device supports both TTL- and CMOS-level input thresholds (VIH = 2.2 V, VIL = 0.8 V) and maintains output drive strength (IOH = –2.0 mA, IOL = 4.0 mA) across its full commercial temperature range (0°C to +70°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32,768 words × 8 bits - matches standard byte-addressable microcontroller data bus width without glue logic |
| Access Time | 15 ns - guarantees sub-67 MHz synchronous bus operation with margin for PCB trace delays |
| VCC Supply | 3.3 V ±300 mV - compatible with modern low-voltage FPGA and ARM SoC I/O rails |
| Operating Current | 50 mA max - enables thermal design for dense PCB layouts with ≤1.65 W total dissipation |
| Standby Current | 500 µA (ISB2, CMOS inputs) - supports battery-backed retention in always-on monitoring systems |
| Package | 28-pin TSOP Type I (Z28) - surface-mount footprint with 0.55 mm pitch, JEDEC MO-153 compliant |
| Input Thresholds | VIH = 2.2 V, VIL = 0.8 V - interoperable with both 3.3 V LVTTL and CMOS logic families |
Pinout & Package
Package: 28-pin Thin Small Outline Package (TSOP Type I), 300-mil body width, lead pitch 0.55 mm, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit unidirectional address bus supporting full 32K-word decoding without external demultiplexing |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit tristate I/O lines sharing pins for read and write; high-impedance when CE or OE inactive |
| CE | Chip Enable (active LOW) | Primary chip-select signal; initiates automatic power-down when HIGH, disabling all internal circuitry |
| OE | Output Enable (active LOW) | Controls output driver enable only; does not affect internal memory state or power consumption |
| WE | Write Enable (active LOW) | Directly gates write operation; combined with CE LOW to define write cycle boundaries per JEDEC timing |
| VCC | Power Supply | 3.3 V core supply; decoupling capacitor placement critical due to 50 mA peak current transitions |
| GND | Ground Reference | Dedicated ground pin (Pin 15) minimizes noise coupling between address and data paths |
Key Features
| Feature | Design Value |
|---|---|
| Single 3.3 V supply | Eliminates dual-rail regulation; reduces BOM count and layout area versus 5 V/3.3 V mixed-signal designs |
| 15 ns access time | Meets timing closure for 66 MHz PCI-X and 50 MHz CompactFlash host interfaces without wait states |
| Automatic CE power-down | Reduces standby power by >95% (to 500 µA) without requiring external control logic or sleep-mode sequencing |
| Low-power 6T cell | Alpha-particle immune design ensures reliable operation in industrial environments with elevated radiation exposure |
| SOJ and TSOP packaging | TSOP Type I (Z28) option enables high-density routing on compact PCBs; SOJ (V21) supports legacy rework workflows |
Applications
| Industrial PLC Memory Buffer | Network Interface Packet Buffer |
|---|---|
|
Use Scenario: Storing real-time I/O status and command queues in programmable logic controllers with deterministic scan-cycle timing. IC Role / Device Role / Timing Role: Asynchronous SRAM buffer providing zero-wait-state access for CPU read/write of process data at 50–100 kHz update rates. Use Value: 15 ns tRC ensures full 32K-word refresh within 480 µs, fitting inside standard 1 ms PLC scan window with margin. |
Use Scenario: Temporary storage of Ethernet frame payloads in switch fabric controllers before forwarding or filtering. IC Role / Device Role / Timing Role: Byte-wide packet buffer interfacing directly to MAC-layer DMA engines with burst-aligned addressing. Use Value: Bidirectional I/O0–I/O7 and CE/OE/WE controls allow lock-step DMA transfers without external transceivers or direction logic. |
| Medical Imaging Local Frame Store | Automotive ADAS Preprocessing Cache |
|
Use Scenario: Holding intermediate pixel data during real-time gamma correction and contrast enhancement in portable ultrasound units. IC Role / Device Role / Timing Role: Low-noise, single-supply SRAM acting as line buffer between image sensor interface and DSP pipeline stages. Use Value: 500 µA ISB2 enables battery-operated modes with <1 mW standby draw, extending diagnostic device runtime. |
Use Scenario: Caching radar point-cloud metadata in forward-collision warning ECUs prior to CAN FD transmission. IC Role / Device Role / Timing Role: Deterministic-access memory staging raw sensor fusion outputs for time-triggered safety-critical software tasks. Use Value: 3.3 V compatibility and –40°C to +85°C industrial grade support direct integration with automotive-grade power domains. |
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-15K | 32K × 16 organization, 15 ns access, 3.3 V, 28-pin SOJ only - wider data bus requires byte masking for 8-bit systems | Requires address/data bus remapping in 8-bit microcontroller designs; no TSOP option limits board density | Select when 16-bit data path alignment simplifies system architecture or when SOJ reworkability is prioritized over footprint size |
| Micron MT55L2568R-15G | 32K × 8, 15 ns, 3.3 V, 32-pin TSOP II - extra pins for BYTE# control and separate UQ/LQ enables | Supports x8/x16 mode switching but adds complexity for simple byte-wide use; larger footprint increases routing congestion | Choose only if future scalability to 16-bit operation or concurrent upper/lower byte access is required in the design roadmap |
Compared with IS61LV25616AL-15K and MT55L2568R-15G, the CY7C1399B-15ZC offers native 8-bit bus alignment, smallest TSOP footprint (28-pin Type I), and lowest standby current (500 µA) among these three - making it optimal for space-constrained, low-power industrial controllers.
Availability
CY7C1399B-15ZC is available at Aetrix Electronics and suitable for industrial PLC memory buffers, network interface packet buffers, and medical imaging local frame stores requiring stable component supply across extended product lifecycles.
Supply support for CY7C1399B-15ZC 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 communications infrastructure markets.
The CY7C1399B series targets cost-sensitive, low-power embedded systems needing deterministic-access SRAM with minimal external support circuitry - emphasizing ease of integration in controller-based memory subsystems.
FAQ
Is CY7C1399B-15ZC RoHS-compliant?
Yes. The "ZC" suffix denotes lead-free (Pb-free) construction per JEDEC J-STD-609, with matte tin plating and halogen-free molding compound. Full compliance documentation, including test reports for Cd, Pb, Hg, Cr⁶⁺, and PBB/PBDE, is available upon request for qualified customers.
What is the maximum clock frequency supported for burst reads?
The CY7C1399B-15ZC is an asynchronous SRAM and does not use a clock signal. Its maximum effective throughput is determined by tRC = 15 ns, yielding up to 66.7 million random accesses per second. For sequential accesses, address transition times and tOHA = 3 ns allow sustained bursts at ≤66 MHz bus rates.
Can CY7C1399B-15ZC operate with 3.0 V supply?
No. The device requires VCC = 3.3 V ±300 mV (3.0 V to 3.6 V) per its operating range specification. At 3.0 V nominal, VCC falls at the lower limit of tolerance; operation below 3.0 V violates the absolute minimum rating of 2.0 V for data retention only - not for active read/write functionality.
Does CY7C1399B-15ZC support battery backup mode?
Yes - when VCC drops to 2.0 V (VDR), the device enters data retention mode with ICCDR ≤ 20 µA. This requires external circuitry to monitor VCC and assert CE HIGH while switching to backup supply; no internal voltage detector or auto-switching logic is integrated.
CY7C1399B-15ZC 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:
- 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-TSOP I
CY7C1399B-15ZC FAQ
1.How can I place an order for CY7C1399B-15ZC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1399B-15ZC 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-15ZC reliable?
The price and inventory of CY7C1399B-15ZC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1399B-15ZC is usually 5 days.
3.What payment methods are accepted for CY7C1399B-15ZC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1399B-15ZC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1399B-15ZC?
CY7C1399B-15ZC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1399B-15ZC 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-15ZC?
For technical support, including CY7C1399B-15ZC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1399B-15ZC requirements.
6.How does Aetrix verify that CY7C1399B-15ZC is sourced from the original manufacturer or authorized distributors?
All CY7C1399B-15ZC 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-15ZC meets industry standards.
7.What is the process for return or replacement of CY7C1399B-15ZC?
All CY7C1399B-15ZC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1399B-15ZC, 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-15ZC part is unused and in its original packaging.
Return procedure for CY7C1399B-15ZC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C1399B-15ZC Tags
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M24C02-WMN6TP
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