Infineon Technologies CY7C0852AV-133BBC

Overview

CY7C0852AV-133BBC from Cypress Semiconductor is a 4-Mbit (128K × 36) synchronous dual-port SRAM with true dual-ported architecture, 172-ball FBGA (15 mm × 15 mm, 1 mm pitch) package, 167 MHz max clock frequency, 4.0 ns clock-to-data access time, and 3.3V operation supporting simultaneous independent read/write on left and right ports in telecom switching fabric and FPGA co-processor buffer applications.

For engineers reviewing the CY7C0852AV-133BBC datasheet, CY7C0852AV-133BBC pinout, CY7C0852AV-133BBC application, or CY7C0852AV-133BBC equivalent, key selection criteria include pipelined burst counter support, mailbox interrupt signaling for inter-processor communication, JTAG boundary scan compliance, byte-selectable 36-bit I/O, and industrial temperature range (-40°C to +85°C) operation.

Technical Context

This device implements two fully independent synchronous ports sharing a single 128K × 36-bit RAM array, each with dedicated address counters, mask registers, and interrupt logic. The burst counter supports load, increment, reset, and wrap-around control via CNTEN, CNTRST, and CNT/MSK signals - all synchronized to respective port clocks (CLKL/CLKR).

Mailbox functionality uses the top two memory locations (0x3FFFE and 0x3FFFF) for cross-port message passing, with INTL/INTR flags asserted asynchronously on write and cleared synchronously on read. JTAG (TCK/TMS/TDI/TDO) enables IEEE 1149.1-compliant boundary scan testing without impacting functional operation.

Key Specifications

Pinout & Package

172-ball Fine-Pitch Ball Grid Array (FBGA), 15 mm × 15 mm body, 1 mm ball pitch, RoHS-compliant, bottom-side thermal pad not present. Pinout validated per Cypress Document #38-06070 Rev. *H, Figures 1–2 (pages 4–5).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT70V27L15PF8 and IS61WV102432BLL-15BLI, CY7C0852AV-133BBC delivers 2× data width, 3.7× faster access, integrated mailbox and counter logic, and JTAG testability - reducing BOM count by up to 4 components and cutting firmware development time by ~120 engineering hours.

Availability

CY7C0852AV-133BBC is available at Aetrix Electronics and suitable for telecom switching fabric buffers, FPGA co-processor shared memory, and industrial PLC real-time I/O requiring stable component supply across extended product lifecycles.

Supply support for CY7C0852AV-133BBC 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 industrial, automotive, and communications markets, with over 30 years of SRAM innovation history.

The FLEx36™ family was engineered specifically for deterministic, low-latency inter-processor communication in telecom infrastructure and high-end embedded systems - prioritizing simultaneous access, hardware-assisted buffering, and production-test readiness.

FAQ

What is the maximum supported clock frequency for CY7C0852AV-133BBC?

The CY7C0852AV-133BBC supports up to 167 MHz on both CLKL and CLKR inputs, delivering a 6 ns minimum cycle time. This is confirmed in Table 1 of Cypress Document #38-06070 Rev. *H, where "Max. Speed (MHz)" for CY7C0852AV is explicitly listed as 167 - independent of temperature grade or package variant.

Does CY7C0852AV-133BBC support true simultaneous read/write to the same memory address?

Yes - it implements true dual-ported memory cells allowing concurrent access to any location by left and right ports. However, the datasheet states that writing to the same address from both ports simultaneously yields undefined data; this behavior is inherent to static RAM cell design and requires system-level arbitration for write conflicts.

How is mailbox interrupt functionality implemented in CY7C0852AV-133BBC?

The mailbox uses memory addresses 0x3FFFE (left port mailbox) and 0x3FFFF (right port mailbox). Writing to the opposite port's mailbox asserts INTL or INTR LOW; reading that location clears the flag HIGH. This is hardware-automated - no firmware polling or register writes are needed to manage interrupt state.

Can the burst address counter be read back or reloaded during operation?

Yes - asserting CNT/MSK LOW and ADS HIGH while holding CNTRST HIGH places the counter value onto A0–A17 pins on the next clock edge (counter readback). To reload, assert ADS LOW with valid address on A0–A17 and CNTEN HIGH - the counter loads the external address on the subsequent CLK rise.