My Inquiry
My Account
Infineon Technologies CY7C1399B-15VXC
- Part No.:
- CY7C1399B-15VXC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C1399B-15VXC.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,642
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY7C1399B-15VXC from Cypress Semiconductor is a 256 Kbit (32K × 8) single-supply 3.3 V CMOS static RAM with 15 ns maximum access time, 50 mA max operating current, automatic CE-controlled power-down (<5 µA standby), and SOJ-28 Pb-free plastic package. It serves as cache or buffer memory in embedded controllers requiring fast, low-voltage, non-refreshed data retention.
For engineers reviewing the CY7C1399B-15VXC datasheet, CY7C1399B-15VXC pinout, CY7C1399B-15VXC application, or CY7C1399B-15VXC equivalent, key selection criteria include TTL/CMOS-compatible control timing (tRC = 15 ns, tPD = 15 ns), dual-power-state current profile (ICC = 50 mA / ISB1 = 5 µA), and SOJ-28 mechanical compatibility with legacy board layouts.
Technical Context
The CY7C1399B-15VXC implements a synchronous, address-decoded 32K × 8 SRAM array using alpha-immune 6T cells, supporting three-state bidirectional I/Os with independent CE, OE, and WE controls. Its automatic power-down activates when CE is HIGH, reducing ICC to ≤5 µA without external logic.
Timing is defined by overlapping CE/WE assertions for writes and CE/OE coordination for reads; all AC parameters are specified at VCC = 3.3 V ±300 mV, CL = 30 pF, and TA = 0°C to +70°C (Commercial range). The device supports both WE-controlled and CE-controlled write cycles with validated setup/hold margins (tSD = 8 ns, tAW = 10 ns).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256 Kbit (32,768 × 8) - supports byte-wide data buses without external multiplexing |
| Access Time | 15 ns - enables direct interface with 66 MHz microcontrollers without wait states |
| VCC Supply | 3.3 V ±300 mV - compatible with modern low-voltage logic families and LDO regulators |
| Operating Current | 50 mA max - determines thermal budget and PCB trace width for continuous read/write operation |
| Standby Current | 5 µA (ISB1) - allows battery-backed operation for >1 year in low-duty-cycle systems |
| Package | 28-pin SOJ (V21), 300-mil width - matches JEDEC MS-012AC footprint for drop-in replacement |
| Input Voltage Range | VIH ≥ 2.2 V, VIL ≤ 0.8 V - ensures reliable interfacing with 3.3 V TTL and CMOS drivers |
Pinout & Package
Package: 28-pin Plastic Small Outline J-Lead (SOJ), 300-mil body width, Pb-free (RoHS-compliant), JEDEC MS-012AC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus selecting one of 32,768 memory locations; no internal latching |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit tri-state data path; high-impedance when CE HIGH or OE HIGH and WE HIGH |
| CE | Chip Enable (active LOW) | Primary device select; initiates automatic power-down when deasserted (HIGH) |
| OE | Output Enable (active LOW) | Controls output drivers only; does not affect internal power state or write capability |
| WE | Write Enable (active LOW) | Controls read/write direction; LOW with CE LOW enables write; HIGH with CE/OE LOW enables read |
| VCC | Power Supply | 3.3 V supply pin; bypass capacitor required within 10 mm for stable 15 ns timing |
| GND | Ground Reference | Signal and power return; separate ground plane recommended for noise-sensitive applications |
Key Features
| Feature | Design Value |
|---|---|
| Single 3.3 V supply | Eliminates need for dual-rail regulators or level shifters in 3.3 V system designs |
| Automatic CE power-down | Reduces standby current to ≤5 µA without external control logic or sleep-mode firmware |
| Alpha-immune 6T cell | Ensures data retention under radiation exposure typical in industrial automation environments |
| SOJ and TSOP packaging options | SOJ-28 (V21) provides mechanical robustness and thermal performance for reflow-soldered industrial PCBs |
| Three-state outputs with OE/CE/WE independence | Enables multi-drop bus sharing and eliminates contention during partial memory mapping |
Applications
| Industrial PLC Memory Buffer | Automotive Engine Control Unit Cache |
|---|---|
|
Use Scenario: Storing real-time sensor calibration tables and intermediate computation results in programmable logic controllers with limited PCB space. IC Role / Device Role / Timing Role: Byte-accessible, non-refreshed cache memory interfaced directly to ARM Cortex-M4 bus with 15 ns timing compliance. Use Value: Enables deterministic 15 ns read latency and <5 µA standby draw during idle scan cycles, extending system uptime between maintenance intervals. |
Use Scenario: Holding transient engine parameter logs and lookup tables in ECU modules operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: High-reliability SRAM providing byte-level random access with guaranteed data retention at 2.0 V VCC during cranking voltage dips. Use Value: Maintains critical fault-code storage during 12 V battery sag events while consuming ≤20 µA in data retention mode (VDR = 2.0 V). |
| Medical Diagnostic Imaging Buffer | Network Switch Packet Buffer |
|
Use Scenario: Temporary frame buffering in portable ultrasound devices where EMI immunity and low power are critical. IC Role / Device Role / Timing Role: Low-noise, low-power SRAM with 6T cell design minimizing bit-flip risk during RF-intensive imaging sessions. Use Value: Delivers 216 mW max active power and <0.5 V noise margin (VOH = 2.4 V, VOL = 0.4 V) for clean analog-digital signal chain integration. |
Use Scenario: Storing packet headers and metadata in Layer 2 Ethernet switches with tight timing budgets. IC Role / Device Role / Timing Role: Fast-access, low-latency memory enabling line-rate forwarding decisions on 100 Mbps+ interfaces. Use Value: Supports tRC = 15 ns cycle time and tHZOE = 6 ns output disable, meeting IEEE 802.3 timing constraints for cut-through switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISSI IS61LV25616AL-15TQLI | 16-bit bus (256K × 16), 44-pin TSOP-II, 15 ns access, 3.3 V only, no automatic power-down | Requires bus-width adaptation; lacks CE-triggered standby, increasing idle power in burst-read systems | Select when wider data path justifies layout redesign and external power management is acceptable |
| Renesas R1LV25616ASB-15SI | 16-bit bus (256K × 16), 48-pin SOP, 15 ns, 3.3 V, supports ZQ calibration but no auto power-down | Higher pin count and larger footprint; no integrated low-power mode - needs external enable gating | Prefer for legacy 16-bit microcontroller interfaces where board area is not constrained |
Compared with IS61LV25616AL-15TQLI and R1LV25616ASB-15SI, the CY7C1399B-15VXC offers native 8-bit compatibility, SOJ-28 footprint efficiency, and hardware-activated sub-5 µA standby-critical for space- and power-constrained embedded systems without auxiliary power control circuitry.
Availability
CY7C1399B-15VXC is available at Aetrix Electronics and suitable for industrial PLCs, automotive ECUs, and medical diagnostic equipment requiring stable component supply, long-lifecycle support, and RoHS-compliant SOJ packaging.
Supply support for CY7C1399B-15VXC 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 connectivity solutions for industrial and automotive markets.
The CY7C1399B belongs to Cypress's legacy low-voltage SRAM product line, designed specifically for cost-sensitive, high-reliability embedded systems needing fast, simple, and robust byte-wide memory without refresh overhead.
FAQ
What is the minimum VCC required to retain data in CY7C1399B-15VXC?
Data retention is guaranteed down to VCC = 2.0 V (VDR), with ICCDR ≤20 µA at that voltage. This allows continued memory hold during brown-out conditions common in automotive and industrial power supplies, provided CE remains HIGH and input voltages stay within valid logic thresholds.
Does CY7C1399B-15VXC support true asynchronous operation?
Yes - it requires no clocks or synchronization signals. All operations are controlled solely by CE, OE, and WE timing relationships. Read and write cycles are fully asynchronous, with tRC = 15 ns defining the minimum interval between successive accesses regardless of clock domain.
Can CY7C1399B-15VXC be used with 5 V tolerant microcontrollers?
No - its inputs are rated for –0.5 V to VCC + 0.5 V (max 3.8 V), and outputs swing only to VOH = 2.4 V (min). Direct interface with 5 V logic requires level-shifting circuitry; it is intended for native 3.3 V systems only.
Is the SOJ-28 package of CY7C1399B-15VXC compatible with reflow soldering?
Yes - the Pb-free SOJ-28 (V21) package is qualified for standard lead-free reflow profiles (JEDEC J-STD-020), including peak temperatures up to 260°C. Cypress specifies 235°C as maximum solder temperature for 30 seconds, consistent with IPC-A-610 Class 2 requirements.
CY7C1399B-15VXC 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-15VXC FAQ
1.How can I place an order for CY7C1399B-15VXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1399B-15VXC 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-15VXC reliable?
The price and inventory of CY7C1399B-15VXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1399B-15VXC is usually 5 days.
3.What payment methods are accepted for CY7C1399B-15VXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1399B-15VXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1399B-15VXC?
CY7C1399B-15VXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1399B-15VXC 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-15VXC?
For technical support, including CY7C1399B-15VXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1399B-15VXC requirements.
6.How does Aetrix verify that CY7C1399B-15VXC is sourced from the original manufacturer or authorized distributors?
All CY7C1399B-15VXC 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-15VXC meets industry standards.
7.What is the process for return or replacement of CY7C1399B-15VXC?
All CY7C1399B-15VXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1399B-15VXC, 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-15VXC part is unused and in its original packaging.
Return procedure for CY7C1399B-15VXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C1399B-15VXC Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
