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Infineon Technologies CY7C1399B-12VXCT
- Part No.:
- CY7C1399B-12VXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C1399B-12VXCT.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:3,364
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Product details
Overview
CY7C1399B-12VXCT from Cypress Semiconductor is a 256 Kbit (32K × 8) single-supply 3.3 V CMOS static RAM with 12 ns access time, 28-pin SOJ (Pb-free) package, automatic CE-controlled power-down, and TTL/CMOS-compatible inputs - deployed in low-voltage cache memory subsystems for industrial microcontroller-based data acquisition systems.
For engineers reviewing the CY7C1399B-12VXCT datasheet, CY7C1399B-12VXCT pinout, CY7C1399B-12VXCT application, or CY7C1399B-12VXCT equivalent, key selection criteria include access timing consistency across temperature, standby current under CE-deselected conditions, I/O drive strength at 3.3 V, and compatibility with legacy SRAM bus protocols requiring three-state output control and address/data multiplexing support.
Technical Context
The CY7C1399B-12VXCT implements a synchronous, non-multiplexed parallel interface with independent CE, OE, and WE controls enabling precise read/write gating and seamless memory expansion. Its 6T alpha-immune cell architecture ensures radiation-tolerant data retention without refresh circuitry.
It operates across commercial (0°C to +70°C) and industrial (–40°C to +85°C) ranges at 3.3 V ±300 mV, delivering 216 mW max active power and reducing to ≤500 µA ISB2 standby current via automatic CE-driven power-down - critical for battery-backed or thermally constrained embedded storage nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32,768 words × 8 bits - supports byte-wide data paths without external demultiplexing |
| Access Time (tAA) | 12 ns max - guarantees deterministic read latency for real-time control loop buffering |
| VCC Supply | 3.3 V ±300 mV - compatible with modern low-voltage logic families and eliminates level-shifting overhead |
| Standby Current (ISB2) | 500 µA max at CMOS input levels - enables >95% power reduction during idle cycles |
| Output Drive | IOH = –2.0 mA, IOL = 4.0 mA - sufficient for driving 30 pF loads over 5 cm PCB traces |
| Input Voltage Thresholds | VIH ≥ 2.2 V, VIL ≤ 0.8 V - ensures robust noise margin against crosstalk in dense memory buses |
| Package | 28-pin SOJ, 300-mil width, Pb-free - RoHS-compliant and compatible with standard wave-solder reflow profiles |
Pinout & Package
28-pin plastic SOJ (Small Outline J-Lead), 300-mil body width, Pb-free finish. Pin 1 marked by notch or dot; leads conform to JEDEC MO-021AC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus supporting full 32K-word decoding without external address latching |
| I/O0–I/O7 | Bidirectional Data Bus | Three-state CMOS I/O pins sharing read/write path - reduces PCB trace count vs. separate DQ/DIN |
| CE | Chip Enable (active LOW) | Primary device select; initiates automatic power-down when HIGH, enabling multi-chip memory banking |
| OE | Output Enable (active LOW) | Controls output buffer enable only; allows read operations while CE remains asserted |
| WE | Write Enable (active LOW) | Gates write cycles; overlapping LOW pulses on CE and WE define valid write window per JEDEC SRAM timing |
| VCC | Power Supply | 3.3 V core supply; decoupling required within 10 mm of pin per layout guidelines |
| GND | Ground Reference | Dedicated ground pin (Pin 14); must be connected to low-impedance plane to minimize switching noise |
Key Features
| Feature | Design Value |
|---|---|
| Single 3.3 V supply operation | Eliminates dual-rail design complexity and associated voltage sequencing requirements |
| Automatic CE power-down | Reduces ICC to ≤500 µA without external control logic or sleep-mode firmware intervention |
| Low-power alpha-immune 6T cell | Ensures data retention under ionizing radiation exposure common in industrial automation environments |
| Three-state outputs with fast Z-state transitions | tHZOE = 5 ns, tLZCE = 3 ns - prevents bus contention during multi-SRAM arbitration |
| SOJ and TSOP packaging options | Enables drop-in replacement between through-hole and surface-mount board revisions |
Applications
| Industrial PLC Data Buffers | Medical Device Real-Time Logging |
|---|---|
Use Scenario: Storing sensor-acquired waveform samples in programmable logic controller backplanes with deterministic 12 ns read response. IC Role / Device Role / Timing Role: Byte-wide parallel SRAM acting as zero-wait-state buffer between ADC interface and ARM Cortex-M4 DMA engine. Use Value: Enables 83.3 MHz effective read throughput without pipeline stalls, sustaining continuous 100 kSPS acquisition across 8 channels. |
Use Scenario: Capturing ECG lead data during portable diagnostic sessions where battery life and thermal dissipation are constrained. IC Role / Device Role / Timing Role: Low-voltage cache memory holding pre-processed signal frames before Bluetooth LE transmission. Use Value: 500 µA standby current extends runtime by >12 hours versus 5 V SRAM alternatives under intermittent capture duty cycle. |
| Automotive Body Control Modules | Test Equipment Pattern Memory |
Use Scenario: Storing configuration tables and fault history logs in CAN-connected BCMs operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Non-refresh volatile memory retaining calibration parameters during ignition-off periods with VCC decay to 2.0 V. Use Value: Guaranteed data retention at 2.0 V (VDR) supports fail-safe logging even during brown-out conditions. |
Use Scenario: Holding stimulus patterns for automated functional test of ASICs on production floor handlers. IC Role / Device Role / Timing Role: High-speed pattern store interfaced directly to FPGA-based vector generator with no glue logic. Use Value: 12 ns tAA ensures sub-84 MHz pattern clock synchronization, eliminating setup/hold violations in 100+ MHz test vectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISSI IS61LV25616AL-12TLI | 256K × 16 organization, 44-pin TSOP-II, 3.3 V, 12 ns - wider data bus, higher pin count | Requires address/data bus redesign; suited for 16-bit microcontrollers but not direct 8-bit replacement | Select only if migrating to 16-bit data path and board layout revision is feasible |
| ON Semiconductor MCM62C16200B-12R | 32K × 8, 28-pin SOJ, 3.3 V, 12 ns - identical pinout and timing, but discontinued (last-time-buy status) | No long-term supply assurance; lacks Cypress's alpha immunity and extended industrial temp validation | Acceptable for legacy repair only; not recommended for new designs due to obsolescence risk |
Compared with IS61LV25616AL-12TLI and MCM62C16200B-12R, the CY7C1399B-12VXCT offers verified Pb-free SOJ compatibility, documented 500 µA ISB2 current at full industrial range, and radiation-hardened cell design - making it the sole option meeting both longevity and reliability requirements for new industrial deployments.
Availability
CY7C1399B-12VXCT is available at Aetrix Electronics and suitable for industrial PLC data buffers, medical device real-time logging, and automotive body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CY7C1399B-12VXCT 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 infrastructure markets.
The CY7C1399B belongs to Cypress's legacy parallel SRAM product line, engineered specifically for low-voltage, low-power cache and buffer applications in space-constrained embedded systems requiring deterministic timing and extended temperature operation.
FAQ
Is CY7C1399B-12VXCT pin-compatible with CY7C1399B-12VC?
Yes - both share identical 28-pin SOJ footprint, pin assignments, and electrical characteristics. The "X" suffix denotes Pb-free finish per JEDEC J-STD-609, while "C" indicates standard SnPb plating. Mechanical dimensions, solder profile compatibility, and thermal performance are functionally equivalent.
Does CY7C1399B-12VXCT support data retention below 3.3 V?
Yes - it guarantees data retention down to VCC = 2.0 V (VDR) with ICCDR ≤ 20 µA, validated per data sheet page 6. This enables reliable operation during brown-out events or battery-backed hold modes without external voltage supervision circuitry.
What is the maximum capacitive load the I/O pins can drive reliably?
The device is characterized for CL = 30 pF (per AC Test Loads, page 4), with guaranteed tAA ≤ 12 ns and tHZOE ≤ 5 ns. Driving >30 pF may increase propagation delay and violate setup/hold margins; use series termination or buffer drivers for loads exceeding this value.
Can CY7C1399B-12VXCT operate in industrial temperature range without derating?
Yes - the "I" grade variants (e.g., CY7C1399B-12VXI) are fully specified from –40°C to +85°C, including all timing, current, and voltage parameters. The "C" grade (including -12VXCT) is rated 0°C to +70°C; industrial use requires explicit "I" ordering code.
CY7C1399B-12VXCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 28-BSOJ (0.300", 7.62mm 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-SOJ
CY7C1399B-12VXCT FAQ
1.How can I place an order for CY7C1399B-12VXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1399B-12VXCT 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-12VXCT reliable?
The price and inventory of CY7C1399B-12VXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1399B-12VXCT is usually 5 days.
3.What payment methods are accepted for CY7C1399B-12VXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1399B-12VXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1399B-12VXCT?
CY7C1399B-12VXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1399B-12VXCT 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-12VXCT?
For technical support, including CY7C1399B-12VXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1399B-12VXCT requirements.
6.How does Aetrix verify that CY7C1399B-12VXCT is sourced from the original manufacturer or authorized distributors?
All CY7C1399B-12VXCT 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-12VXCT meets industry standards.
7.What is the process for return or replacement of CY7C1399B-12VXCT?
All CY7C1399B-12VXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1399B-12VXCT, 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-12VXCT part is unused and in its original packaging.
Return procedure for CY7C1399B-12VXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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