Renesas 71V3577S85BGG8

Overview

71V3577S85BGG8 from Renesas Electronics is a 128K × 36-bit (4.608 Mb), 3.3V synchronous SRAM with flow-through outputs, burst counter, and single-cycle deselect. It supports 8.5 ns access time at up to 87 MHz clock frequency, operates across industrial temperature range (–40°C to +85°C), and uses JEDEC-standard 119-ball BGA (BGG) packaging. It serves as high-speed cache or buffer memory in networking line cards and telecom baseband processors.

For engineers reviewing the 71V3577S85BGG8 datasheet, 71V3577S85BGG8 pinout, 71V3577S85BGG8 application, or 71V3577S85BGG8 equivalent, key selection criteria include burst mode support (linear/interleaved), flow-through output architecture, 3.3V I/O compatibility, industrial temperature rating, and TQFP/BGA package options - all critical for deterministic latency in real-time packet buffering and control-plane memory subsystems.

Technical Context

The 71V3577S85BGG8 implements a synchronous, clock-driven interface with registered address, control, and data inputs, but unregistered (flow-through) data outputs - enabling minimal read latency. Its internal burst address counter advances on ADV=LOW and selects sequence order via LBO pin (linear vs. interleaved), supporting four-word bursts per address cycle.

Write operations are self-timed and configurable via global write (GW), byte write enable (BWE), and individual byte write selects (BW1–BW4). Power management includes asynchronous ZZ sleep mode (≤35 µA standby current) and synchronous chip deselect, ensuring rapid entry/exit from low-power states without data loss.

Key Specifications

Pinout & Package

71V3577S85BGG8 is packaged in a JEDEC-standard 119-ball fine-pitch BGA (BGG119), 12 mm × 12 mm body, 0.8 mm ball pitch. Pinout conforms to Renesas BG119 layout for 128K × 36 configuration, with dedicated VDDQ/VSS pairs per quadrant for I/O power integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1371DV33-85BAXI and AS7C33128P36B-85BIN, the 71V3577S85BGG8 uniquely delivers hardware-selectable burst order (LBO) and ADV-gated burst control in an industrial-rated 119-ball BGA - essential for systems requiring runtime burst-mode reconfiguration without firmware overhead.

Availability

71V3577S85BGG8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and radar signal processing applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for 71V3577S85BGG8 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

Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The 71V3577S family targets high-performance, low-latency memory subsystems in real-time communication and control equipment, emphasizing deterministic timing, burst efficiency, and industrial reliability.

FAQ

What memory organization does the 71V3577S85BGG8 support?

The 71V3577S85BGG8 is organized as 128K × 36 bits (4.608 Mbit) and can also be configured as 256K × 18 bits using address pin remapping. This dual-organization flexibility allows system designers to optimize data bus width and address decoding for specific SoC or FPGA interfaces without changing the 71V3577S85BGG8 footprint.

Does the 71V3577S85BGG8 support both linear and interleaved burst modes?

Yes, the 71V3577S85BGG8 supports both linear and interleaved burst sequences via the LBO (Linear Burst Order) pin. When LBO = LOW, linear burst is selected; when LBO = HIGH, interleaved burst is active. This hardware-selectable mode ensures compatibility with diverse cache controllers and avoids software configuration overhead in the 71V3577S85BGG8 implementation.

What is the maximum clock frequency supported by the 71V3577S85BGG8 in industrial temperature range?

The 71V3577S85BGG8 supports up to 87 MHz clock frequency in the industrial temperature range (–40°C to +85°C), corresponding to an 8.5 ns access time. This speed grade is validated across the full industrial operating voltage range (3.135 V to 3.465 V) and is guaranteed per Renesas AC Electrical Characteristics Table 16.

How does the flow-through output architecture of the 71V3577S85BGG8 affect system timing?

The flow-through output architecture of the 71V3577S85BGG8 eliminates the output register stage, resulting in direct array-to-I/O path timing. This reduces clock-to-data delay (tCD) to 8.5 ns and removes output register setup/hold constraints - simplifying timing closure in high-speed interfaces and enabling tighter read cycle margins in the 71V3577S85BGG8 design.

Is the 71V3577S85BGG8 compatible with 3.3V-only system interfaces?

Yes, the 71V3577S85BGG8 uses separate 3.3V ±5% supplies for core (VDD) and I/O (VDDQ), with VIH thresholds referenced to VDDQ. All inputs accept 3.3V-compatible logic levels, and outputs drive 3.3V CMOS levels - making the 71V3577S85BGG8 fully interoperable with standard 3.3V FPGA, ASIC, and processor buses without level-shifting.