CYPRESS CY7C0851AV-133BBI
- 2Mbit (64K × 36) synchronous dual-port SRAM — two fully independent read/write ports operating simultaneously
- 133MHz clock frequency, 4.4ns access time, 3.3V supply (3.135V to 3.465V)
- Parallel interface, FBGA package, industrial temperature grade −40°C to +85°C
- True dual-port architecture: simultaneous read/write from two independent processors without bus arbitration
- RoHS compliant; field-proven in networking, defense embedded computing, and high-performance DSP applications
Cypress Semiconductor (now Infineon Technologies) established its synchronous dual-port SRAM product line as a reference architecture for high-throughput shared memory buffer applications — designs where two independent processors or bus masters must access a common memory space simultaneously without arbitration overhead or access latency penalties. The CY7C0851AV-133BBI is available from stock at Sparkle Electronics, serving embedded systems engineers, defense electronics procurement teams, and networking equipment OEMs requiring reliable access to Cypress dual-port SRAM with verified sourcing, same-day response on pricing and availability, and full supply chain documentation. The 133BBI ordering suffix designates 133MHz operation in the FBGA ball grid array package with industrial temperature grade (−40°C to +85°C) in tray packaging — the correct specification for surface-mount production assembly processes in industrial and defense embedded computing programs.
The CY7C0851AV-133BBI provides 2Mbit of addressable storage organized as 64K × 36 bits, accessible through two fully independent synchronous ports each capable of simultaneous read or write operations at 133MHz. This true dual-port architecture eliminates the shared bus contention that single-port SRAM imposes in multi-processor designs — each port maintains its own address, data, and control bus, with hardware semaphore logic providing the inter-processor coordination mechanism for shared memory access management. At 4.4ns access time, the CY7C0851AV-133BBI sustains 133MHz operation with sufficient timing margin for interface to a broad range of high-performance embedded processors, FPGAs, and DSP devices. For aerospace and defense embedded computing subsystems, radar signal processing designs, and defense networking equipment requiring shared memory buffer solutions with industrial temperature reliability, the CY7C0851AV-133BBI is a well-established, field-proven component specification. Contact Sparkle Electronics to confirm stock and request a same-day quote.
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CY7C0851AV-133BBI In Stock: Supply Chain Realities for Dual-Port SRAM Procurement
Synchronous dual-port SRAM is a performance-critical component category with a narrowing supplier base — as Cypress (now Infineon) has consolidated its SRAM portfolio, availability windows for specific density and package combinations have become less predictable. Production programs specifying the CY7C0851AV-133BBI face a procurement environment where spot market availability, lead time variability, and counterfeit risk require active supply chain management. Sparkle Electronics maintains verified stock of the CY7C0851AV-133BBI for procurement teams requiring immediate availability, RFQ response with confirmed lead time, cross-reference support to alternative density options, or supply continuity planning for multi-year production schedules. Engineers and procurement professionals sourcing CY7C0851AV-133BBI in stock, Cypress dual-port SRAM 64K×36 133MHz, CY7C0851AV-133BBI pricing and lead time, or CY7C0851AV-133BBI datasheet and equivalent will find Sparkle Electronics provides same-day response with full lot documentation. Submit an inquiry for pricing and stock confirmation within 24 hours.
CY7C0851AV-133BBI vs. Related Cypress Dual-Port SRAM Variants
The CY7C085xAV family covers three density options in a consistent dual-port synchronous architecture. Understanding the variant map is essential for procurement cross-reference and density migration planning:
| Parameter | CY7C0851AV-133BBI | CY7C0852AV-133BBI | CY7C0853V-133BBI |
|---|---|---|---|
| Availability | In Stock at Sparkle | Confirm with Sparkle | Confirm with Sparkle |
| Memory Capacity | 2Mbit | 4Mbit | 9Mbit |
| Organization | 64K × 36 | 128K × 36 | 256K × 36 |
| Clock Frequency | 133MHz | 133MHz | 133MHz |
| Access Time | 4.4ns | 4.4ns | 4.7ns |
| Supply Voltage | 3.3V | 3.3V | 3.3V |
| Temperature | −40°C to +85°C | −40°C to +85°C | −40°C to +85°C |
| Package | FBGA | FBGA | FBGA |
| RoHS | Yes | Yes | Yes |
The 64K × 36 organization of the CY7C0851AV-133BBI provides 36-bit wide data paths — 32 data bits plus 4 parity/ECC bits — directly compatible with 32-bit processor architectures that require parity memory support without external parity generation logic. For designs requiring deeper address space without changing port width, the CY7C0852AV-133BBI doubles the depth to 128K rows while maintaining the 36-bit wide data organization and 4.4ns access time.
Dual-Port Architecture: What It Enables That Single-Port SRAM Cannot
In a single-port SRAM design, two processors sharing a common memory buffer must arbitrate for bus access — one processor waits while the other completes its access cycle. In a 133MHz system, each arbitration cycle represents a 7.5ns latency penalty per access conflict. The CY7C0851AV-133BBI’s true dual-port architecture eliminates this entirely: each port has its own independent address decoder, data bus, and control logic. Both ports can simultaneously execute read or write operations to different memory addresses without any wait states. For radar signal processing, electronic warfare, and defense networking applications where inter-processor data exchange rates are deterministic throughput requirements rather than best-effort targets, eliminating arbitration latency from the shared memory interface is a fundamental system performance requirement — not an optimization. For broader memory and storage component requirements across defense and industrial programs, Sparkle Electronics maintains inventory covering the full high-reliability memory spectrum.
Frequently Asked Questions
What does CY7C0851AV-133BBI decode to?
CY7C = Cypress SRAM product family prefix; 0851 = synchronous dual-port SRAM, 2Mbit (64K × 36) density; AV = architecture revision indicating 3.3V operation with AV-generation timing and feature set; -133 = 133MHz clock frequency rating; BB = FBGA ball grid array package; I = industrial temperature grade (−40°C to +85°C); the trailing packaging designator indicates tray packaging.
Where can I buy CY7C0851AV-133BBI in stock?
Sparkle Electronics maintains stock of the CY7C0851AV-133BBI for embedded systems and defense procurement. Contact our team for current pricing, available quantity, and confirmed lead time. Same-day response on RFQs — we supply defense subcontractors, networking OEMs, and industrial embedded systems engineers globally. Supply continuity planning and long-term program support can be discussed at inquiry stage.
What is the difference between CY7C0851AV-133BBI and CY7C0851AV-133AXI?
Both variants are the same 2Mbit (64K × 36) synchronous dual-port SRAM at 133MHz with identical electrical specifications. The BBI suffix designates FBGA (ball grid array) package in tray packaging with industrial temperature grade. The AXI suffix designates TQFP (thin quad flat pack) package in tube packaging with industrial temperature grade. Package selection between BBI and AXI is determined by PCB footprint and assembly process requirements — the electrical performance and temperature ratings are identical.
What is the hardware semaphore mechanism in the CY7C0851AV?
The CY7C0851AV includes hardware semaphore logic — dedicated register bits accessible from both ports — that provides a hardware-enforced mutual exclusion mechanism for inter-processor synchronization. Each processor can read and set the semaphore register to coordinate access to shared data structures in the SRAM without requiring software polling loops or external semaphore hardware. The semaphore state is readable from both ports simultaneously, and the hardware arbitration logic ensures that only one port can successfully claim the semaphore in any given clock cycle.
How does the CY7C0851AV handle simultaneous access to the same address from both ports?
The CY7C0851AV includes built-in busy logic that detects simultaneous access to the same memory address from both ports. When such a collision is detected, the device asserts the BUSY output to one port — signaling that the conflicting access has been delayed by one clock cycle — while the other port completes its access normally. This collision detection and resolution mechanism is handled in hardware without processor intervention, ensuring data integrity in multi-master shared memory configurations.
What cross-reference or replacement options are available for CY7C0851AV-133BBI?
Functional alternatives include IDT (Renesas) 70V24L or 70V27L series dual-port SRAMs and similar 2Mbit synchronous dual-port devices. Pin-compatibility between alternative manufacturers’ dual-port SRAMs is not guaranteed — the CY7C0851AV pinout is specific to the Cypress architecture, and substitution requires verification of address/data bus assignments, control signal polarity, and timing parameters against the system PCB layout and firmware timing budget. Contact Sparkle Electronics for cross-reference support and alternative sourcing evaluation specific to your design requirements.
Sourcing CY7C0851AV-133BBI for an embedded computing or defense program? Sparkle Electronics maintains verified stock of Cypress synchronous dual-port SRAM across multiple density options, with same-day response on pricing, lead time, and supply continuity planning. Submit an inquiry — your procurement team will have a confirmed response within 24 hours.
