Renesas 71V3558SA100BQG

Overview

71V3558SA100BQG from Renesas is a 3.3V synchronous ZBT SRAM with 128K × 36-bit (4.5 Mbit) organization, 100 MHz clock speed, 3.5 ns clock-to-data access, zero bus turnaround architecture, and JEDEC-standard 100-pin TQFP packaging. It enables high-throughput memory interfacing in network packet buffers and telecom line cards where write-read transition latency must be eliminated.

For engineers reviewing the 71V3558SA100BQG datasheet, 71V3558SA100BQG pinout, 71V3558SA100BQG application, or 71V3558SA100BQG equivalent, key selection criteria include burst-mode timing compliance, byte-write granularity for partial-word updates, JTAG boundary-scan support for production testability, and industrial-temperature operation up to +85°C.

Technical Context

The 71V3558SA100BQG implements a fully pipelined synchronous interface with positive-edge-triggered address, data, and control registers. Its internal burst counter supports linear or interleaved 4-word sequences controlled by the LBO pin, while ADV/LD governs address load versus counter increment behavior.

ZBT™ operation eliminates dead cycles between read and write operations via synchronized output buffer enable and dual-phase command execution - address/control latched on cycle N, data transfer occurs on cycle N+2. The device integrates three chip enables (CE1, CE2, CE2) with two-cycle deselect and optional IEEE 1149.1 JTAG for boundary scan.

Key Specifications

Pinout & Package

71V3558SA100BQG is packaged in a JEDEC-standard 100-pin plastic thin quad flatpack (TQFP), 14 mm × 20 mm body size, with exposed pad not electrically connected. Pin 64 supports ZZ (sleep mode) on latest die revision; pins 14/16/66 tolerate VIH-level input without direct VDD connection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 71V3558SA100BQG, the 119-ball BGA variant offers higher I/O density but demands PCB redesign, while the 85 MHz version trades peak bandwidth for lower power and cost - both retain identical ZBT™ behavior, burst control, and industrial temperature range.

Availability

71V3558SA100BQG is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, and industrial PLC data logging requiring stable component supply, long-term lifecycle support, and guaranteed industrial-temperature performance.

Supply support for 71V3558SA100BQG 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 delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The 71V3558SA series belongs to Renesas' high-performance ZBT SRAM product line, engineered specifically for low-latency, burst-capable memory subsystems in networking and real-time control equipment.

FAQ

What is the maximum clock frequency supported by the 71V3558SA100BQG?

The 71V3558SA100BQG supports a maximum clock frequency of 100 MHz. This rating is validated across the full industrial temperature range (–40°C to +85°C) and ensures reliable operation with 3.5 ns clock-to-data access time under specified VDD/VDDQ conditions. The 71V3558SA100BQG achieves this performance using a high-speed CMOS process and fully registered I/O architecture.

Does the 71V3558SA100BQG support true zero bus turnaround between read and write operations?

Yes, the 71V3558SA100BQG implements ZBT™ (Zero Bus Turnaround) architecture, which eliminates dead cycles between consecutive read and write operations. This is achieved through internally synchronized output buffer enable and pipelined command execution - the 71V3558SA100BQG initiates the next transaction immediately after completing the prior one without bus idle periods.

How does the burst counter function in the 71V3558SA100BQG?

The 71V3558SA100BQG contains an on-chip 4-word burst counter controlled by ADV/LD and LBO. When ADV/LD is high, the counter increments; when low, it loads a new external address. LBO selects linear or interleaved sequence. Each burst delivers four consecutive words with single address setup, reducing bus overhead by 75% compared to discrete accesses - a core capability of the 71V3558SA100BQG.

Can the 71V3558SA100BQG operate in low-power sleep mode?

Yes, the 71V3558SA100BQG supports synchronous sleep mode via the ZZ pin. When ZZ is driven high, the internal clock is gated and dynamic power drops significantly while data retention is guaranteed. This feature is especially valuable in battery-backed or energy-conscious applications like portable medical devices or remote industrial sensors using the 71V3558SA100BQG.

Is JTAG boundary scan available on the 71V3558SA100BQG in TQFP packaging?

Yes, the 71V3558SA100BQG includes full IEEE 1149.1 JTAG support (TMS, TDI, TCK, TDO, TRST) in its 100-pin TQFP package. Pins are assigned per JEDEC standard layout - TMS/TDI/TCK/TDO appear on dedicated pins (e.g., TMS on pin A11, TDI on pin P6), and TRST is available as optional reset. This enables production test, interconnect validation, and debug without requiring BGA-specific tooling for the 71V3558SA100BQG.