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Infineon Technologies CYDMX256A16-90BVXI
- Part No.:
- CYDMX256A16-90BVXI
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 100-VFBGA
- Datasheet:
-
CYDMX256A16-90BVXI.pdf
- Description:
- IC SRAM 256KBIT PAR 100VFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,488
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Product details
Overview
CYDMX256A16 from Infineon Technologies (formerly Cypress) is a 16K × 16 asynchronous dual-port static RAM with true independent port access, one dedicated ADM (address/data multiplexed) interface and one configurable SRAM/ADM interface, 90 ns ADM access time, 1.8–3.0 V core voltage, and industrial temperature range (–40°C to +85°C), used in interprocessor communication buffers and real-time video frame storage.
For engineers reviewing the CYDMX256A16 datasheet, CYDMX256A16 pinout, CYDMX256A16 application, or CYDMX256A16 equivalent, key selection criteria include port arbitration behavior, mailbox interrupt timing, byte-selectable I/O drive, independent VDDIOL/VDDIOR support, and BGA package thermal/mechanical constraints for high-density PCB layout.
Technical Context
This device implements fully asynchronous dual-port architecture with on-chip arbitration logic resolving memory address collisions between left and right ports. Each port features independent chip select (CS#), write enable (WE#), output enable (OE#), and busy/interrupt flags (BUSY#, INT#).
The left port is fixed as ADM interface; the right port is configurable via MSEL pin (0 = standard SRAM, 1 = ADM). Mailbox interrupt uses top two memory addresses (0x3FFF for right port, 0x3FFE for left port) with automatic reset-on-read behavior and power-up default assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16,384 × 16-bit (16K × 16), total 262,144 bits |
| ADM Access Time | 90 ns max - defines minimum cycle time for left port or right port in ADM mode |
| Core Voltage (VCC) | 1.8 V / 2.5 V / 3.0 V - supports mixed-voltage system integration with independent I/O rails |
| Standby Current | 2 µA typical - enables ultra-low-power sleep mode per port when CS# is deasserted |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and communications equipment |
| Package | 100-ball Pb-free BGA, 6 mm × 6 mm, 0.5 mm pitch - requires controlled-depth reflow and IPC-7351B footprint |
| I/O Voltage Support | VDDIOL and VDDIOR independently set to 1.8 V or 2.5 V LVCMOS or 3.0 V LVTTL - enables heterogeneous processor interfacing |
Pinout & Package
Package: 100-ball Pb-free BGA (6 mm × 6 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level (MSL) 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS#L / CS#R | Active-low chip select | Enables port activity; HIGH forces independent port into ultra-low-power standby (ISB3 = 2 µA) |
| ADV#L / ADV#R | Address latch enable | Rising edge latches address from I/O bus on ADM ports; ADV#R only active when MSEL = 1 |
| UB#L / LB#L / UB#R / LB#R | Upper/lower byte enable | Active-low controls 8-bit granularity writes/reads; allows partial-word updates without read-modify-write |
| INT#L / INT#R | Mailbox interrupt output | Open-drain signal asserted when opposite port writes to its dedicated mailbox address (0x3FFE / 0x3FFF) |
| MSEL | Right port interface mode select | Logic HIGH configures right port as ADM; LOW configures as standard SRAM with dedicated A[13:0] pins |
| VDDIOL / VDDIOR | Left/right I/O power supply | Independent rails allow left port to interface with 1.8 V FPGA while right port connects to 2.5 V microcontroller |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port arbitration | Hardware-resolved memory contention with BUSY# flag and deterministic priority under tPS compliance |
| Configurable right port interface | MSEL pin selects between standard SRAM (dedicated address bus) or ADM (shared address/data bus) operation |
| Mailbox-interrupt messaging | Two dedicated memory locations (0x3FFF/0x3FFE) enable lock-free inter-processor signaling without external logic |
| Independent port power-down | Per-port CS# control reduces active current to 2 µA standby without affecting other port functionality |
| Byte-selectable I/O drive | UB#/LB# pins allow simultaneous 8-bit reads/writes to upper or lower data byte, reducing bus turnaround overhead |
Applications
| Interprocessor Communication Buffer | Dual-Port Video Frame Memory |
|---|---|
Use Scenario: Two independent microcontrollers exchange status and command data in real time without shared bus contention or software polling. IC Role / Device Role / Timing Role: Dual-port SRAM acts as shared memory with hardware arbitration and mailbox interrupts enabling deterministic message passing. Use Value: Eliminates need for external arbitration logic or software semaphores; 90 ns ADM access supports sub-100 ns inter-core handshaking. | Use Scenario: Simultaneous capture of video frames by one processor and display rendering by another in embedded vision systems. IC Role / Device Role / Timing Role: Left port accepts pixel data from image sensor interface; right port supplies rendered pixels to display controller at independent clock domains. Use Value: Enables seamless frame buffering with zero wait-state overlap; byte-select capability supports YUV 4:2:2 packing efficiency. |
| Industrial PLC Status Exchange | Communications Protocol Stack Buffer |
Use Scenario: Real-time exchange of I/O status and control commands between safety-critical and non-safety CPU cores in programmable logic controllers. IC Role / Device Role / Timing Role: Acts as fault-isolated memory bridge with independent power domains (VDDIOL/VDDIOR) and industrial temperature rating. Use Value: Guarantees deterministic latency (<90 ns) and failsafe mailbox signaling even during voltage rail transients. | Use Scenario: Storing packet headers and payload fragments across TCP/IP stack layers running on separate processors in network gateways. IC Role / Device Role / Timing Role: Provides concurrent read/write access to protocol state tables and buffer descriptors with hardware collision resolution. Use Value: Reduces packet processing jitter by eliminating software-managed memory locks; BUSY# flag enables immediate retry without polling delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT70V25L25PF | 25 ns access time, 3.3 V only, 128K × 16 density, no ADM interface | Requires external address latching logic for multiplexed buses; higher power (ICC = 200 mA active) | Select when deterministic <25 ns latency is required and voltage domain is fixed at 3.3 V. |
| ISSI IS61WV102416BLL | Single-port, 1024K × 16, 10 ns access, 3.3 V/2.5 V, no arbitration or mailbox | No hardware inter-processor signaling; requires software-managed semaphores and external bus sharing logic | Select only if dual-port functionality is not required and cost-per-bit is primary constraint. |
Compared with IDT70V25L25PF and IS61WV102416BLL, CYDMX256A16 uniquely delivers asymmetric interface flexibility (ADM + SRAM), ultra-low standby power (2 µA), and integrated mailbox interrupts-enabling simpler, lower-power, and more deterministic inter-processor designs without external glue logic.
Availability
CYDMX256A16 is available at Aetrix Electronics and suitable for interprocessor communication buffers, dual-port video frame storage, and industrial PLC status exchange requiring stable component supply across extended product lifecycles.
Supply support for CYDMX256A16 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
Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive MCUs, and memory solutions with strong industrial and automotive qualification heritage.
CYDMX256A16 belongs to Infineon's MoBL® (Mobile Low Power) ADM dual-port SRAM product line, designed specifically for low-power, high-reliability inter-processor communication in space-constrained industrial and communications equipment.
FAQ
What is the function of the MSEL pin on CYDMX256A16?
The MSEL pin configures the right port interface mode: logic HIGH selects ADM (address/data multiplexed) operation, requiring ADV#R and using I/O pins for address input; logic LOW selects standard SRAM mode, using dedicated A[13:0] pins for addressing. This pin is sampled at power-up and remains latched until next reset.
How does mailbox interrupt behavior differ between CYDMX256A16 and smaller-density variants?
Mailbox addresses scale with memory depth: CYDMX256A16 uses 0x3FFF (right port) and 0x3FFE (left port); CYDMX128A16 uses 0x1FFF/0x1FFE; CYDMX064A16 uses 0xFFF/0xFFE. All share identical interrupt assertion/reset logic, but address mapping ensures no conflict across densities in multi-SRAM systems.
Can both ports operate at different I/O voltages simultaneously?
Yes. VDDIOL and VDDIOR are electrically isolated power inputs, allowing left port to operate at 1.8 V LVCMOS while right port runs at 2.5 V LVCMOS or 3.0 V LVTTL. Core voltage (VCC) must be ≤ the lower of the two I/O voltages, and all I/O pins tolerate their respective VDDIO rail.
Is CYDMX256A16 pin-compatible with CYDMX256B16?
Yes. CYDMX256A16 and CYDMX256B16 share identical pinout, package, and electrical specifications. The 'A' and 'B' suffixes denote minor process or test revisions-not functional or mechanical differences-and both are drop-in replacements per Infineon's continuity policy.
CYDMX256A16-90BVXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 100-VFBGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, MoBL
- Memory Size:
- 256Kbit
- Memory Organization:
- 16K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 90ns
- Access Time:
- 90 ns
- Voltage - Supply:
- 1.8V ~ 3.3V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-VFBGA (6x6)
CYDMX256A16-90BVXI FAQ
1.How can I place an order for CYDMX256A16-90BVXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CYDMX256A16-90BVXI 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 CYDMX256A16-90BVXI reliable?
The price and inventory of CYDMX256A16-90BVXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYDMX256A16-90BVXI is usually 5 days.
3.What payment methods are accepted for CYDMX256A16-90BVXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYDMX256A16-90BVXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CYDMX256A16-90BVXI?
CYDMX256A16-90BVXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CYDMX256A16-90BVXI 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 CYDMX256A16-90BVXI?
For technical support, including CYDMX256A16-90BVXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYDMX256A16-90BVXI requirements.
6.How does Aetrix verify that CYDMX256A16-90BVXI is sourced from the original manufacturer or authorized distributors?
All CYDMX256A16-90BVXI 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 CYDMX256A16-90BVXI meets industry standards.
7.What is the process for return or replacement of CYDMX256A16-90BVXI?
All CYDMX256A16-90BVXI units undergo pre-shipment inspection (PSI). If there is an issue with CYDMX256A16-90BVXI, 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 CYDMX256A16-90BVXI part is unused and in its original packaging.
Return procedure for CYDMX256A16-90BVXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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