Cypress Semiconductor Corp CY7C0851AV-167AXC

Overview

CY7C0851AV-167AXC from Cypress Semiconductor is a 2-Mbit (64K × 36) synchronous true dual-port SRAM with pipelined read/write operation, 167 MHz clock rate, 4.0 ns clock-to-data access time, and 3.3V supply-designed for high-bandwidth inter-processor communication in telecom line cards and packet buffer applications.

For engineers reviewing the CY7C0851AV-167AXC datasheet, CY7C0851AV-167AXC pinout, CY7C0851AV-167AXC application, or CY7C0851AV-167AXC equivalent, key selection criteria include simultaneous port arbitration, mailbox interrupt support, burst counter wrap control, byte-select granularity, and JTAG boundary-scan compliance for system-level testability.

Technical Context

This device implements two independent synchronous ports sharing a single 64K × 36-bit memory array, each with dedicated address counters, mask registers, and interrupt logic. Clock-to-data timing is fully pipelined, enabling deterministic 4.0 ns output registration on every rising CLK edge.

Each port supports programmable burst addressing via 16-bit counters (A0L–A15L / A0R–A15R), counter-interrupt flags (CNTINTL/CNTINTR), and mask-register-controlled wrap-around-enabling precise block retransmission and circular buffer management without external logic.

Key Specifications

Pinout & Package

Package: 172-ball Fine-Pitch BGA (1 mm pitch, 15 mm × 15 mm); RoHS-compliant, lead-free finish. Pinout validated per Cypress Document #38-06070 Rev. *H, Figure 1 (BGA top view).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous dual-port SRAM applications.

Compared with IDT70V27L15PF and CY7C028V-25AC, CY7C0851AV-167AXC delivers 2× density, 6.7× higher throughput, and integrated hardware features (mailbox, counter wrap, JTAG) that reduce system-level logic count and firmware complexity.

Availability

CY7C0851AV-167AXC is available at Aetrix Electronics and suitable for telecom infrastructure, network switching, industrial automation, and medical imaging systems requiring stable component supply and long-term manufacturability.

Supply support for CY7C0851AV-167AXC 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-performance memory and programmable solutions for communications, industrial, and automotive markets.

CY7C0851AV belongs to the FLEx36™ family-engineered specifically for deterministic, low-latency inter-processor data exchange in synchronous, clock-domain-isolated systems.

FAQ

What is the maximum supported clock frequency for CY7C0851AV-167AXC?

The device is rated for 167 MHz operation, verified by Cypress in characterization across voltage (3.3 V ± 0.3 V) and temperature (–40°C to +85°C). At this frequency, clock-to-data access is guaranteed at ≤4.0 ns with proper setup/hold timing on address and control inputs per datasheet Table 5.

Does CY7C0851AV-167AXC support simultaneous read/write to the same memory location?

No-simultaneous writes to the same address by both ports produce undefined data. The datasheet explicitly states "the result of writing to the same location by more than one port at the same time is undefined." Applications must implement external arbitration or use mailbox/interrupt logic to coordinate access.

How is the burst counter initialized and controlled?

The counter loads an external address via ADS assertion, increments on CNTEN LOW + CLK rising edge, resets to zero on CNTRST LOW, and wraps based on mask register bits. Counter value and mask register contents can be read back on address lines when CNT/MSK is asserted LOW, per Table 3 in the datasheet.

Is JTAG boundary scan supported on CY7C0851AV-167AXC?

Yes-IEEE 1149.1-compliant JTAG is fully implemented with TDI, TDO, TCK, and TMS pins. It supports instruction register, bypass, and boundary-scan register operations for interconnect testing, as confirmed in the Functional Description section and Pin Definitions table.