Renesas 71V65603S150BGG8

Overview

71V65603S150BGG8 from Renesas Electronics is a 3.3V synchronous ZBT™ SRAM with 256K × 36-bit organization (9,437,184 bits), 150 MHz clock speed, 3.8 ns clock-to-data access time, and zero bus turnaround (ZBT) architecture enabling dead-cycle-free read/write transitions. It operates in industrial temperature range (–40°C to +85°C) and supports burst reads/writes in linear or interleaved order for high-throughput memory subsystems in network packet buffers and baseband processors.

For engineers reviewing the 71V65603S150BGG8 datasheet, 71V65603S150BGG8 pinout, 71V65603S150BGG8 application, or 71V65603S150BGG8 equivalent, key selection criteria include its pipelined output registers, four-word burst capability, individual byte write enables (BW1–BW4), synchronous R/W control, and JEDEC-standard 119-ball BGA (BGG) package with VDDQ-separated I/O supply.

Technical Context

The 71V65603S150BGG8 implements a fully synchronous, clock-edge-triggered interface where address, control, and data are registered on the rising edge of CLK. Its internal burst counter advances on ADV/LD = HIGH, supporting both linear and interleaved sequences selected by static LBO input. All synchronous inputs-including CE1/CE2/CE2, R/W, CEN, BWx, and ADV/LD-are sampled relative to CLK, while OE and ZZ remain asynchronous.

ZBT operation eliminates bus turnaround latency: a write cycle followed immediately by a read (or vice versa) proceeds without dead cycles due to internally synchronized output buffer enable and pipelined data paths. The device uses separate core (VDD) and I/O (VDDQ) 3.3V supplies, with power-down mode activated via asynchronous ZZ input, retaining data while reducing current draw.

Key Specifications

Pinout & Package

71V65603S150BGG8 is packaged in a JEDEC-standard 119-ball fine-pitch ball grid array (fBGA), designated BGG119 per Renesas ordering nomenclature. The package measures 12 mm × 12 mm with 0.8 mm pitch and exposes dedicated VDD, VDDQ, and VSS balls for low-noise power delivery and signal integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-167AXC and IS61WV25636BLL-150BLI, the 71V65603S150BGG8 uniquely delivers zero bus turnaround and integrated burst sequencing-critical for minimizing latency in memory-intensive real-time systems where read/write alternation is frequent and deterministic timing is mandatory.

Availability

71V65603S150BGG8 is available at Aetrix Electronics and suitable for network infrastructure, industrial automation, and automotive ADAS applications requiring stable component supply, long-term lifecycle assurance, and industrial-temperature-rated memory performance.

Supply support for 71V65603S150BGG8 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 71V65603S150BGG8 belongs to Renesas' high-performance ZBT SRAM product line, engineered specifically for low-latency, high-throughput memory subsystems in networking equipment and real-time signal processing platforms.

FAQ

What does the 'S150' suffix in 71V65603S150BGG8 indicate?

The 'S150' suffix denotes the speed grade: 150 MHz maximum operating frequency. This specifies the device's guaranteed timing performance under industrial conditions (–40°C to +85°C) with 3.3V ±5% supplies. The 71V65603S150BGG8 achieves 3.8 ns clock-to-data access at this speed, making it suitable for demanding real-time applications where deterministic latency is critical.

How does the ZBT™ feature improve system performance compared to standard synchronous SRAMs?

The ZBT™ feature in the 71V65603S150BGG8 eliminates dead cycles between alternating read and write operations-unlike standard synchronous SRAMs that require idle cycles for bus turnaround. This enables continuous 150 MHz burst transfers, increasing effective bandwidth by up to 25% in mixed-access scenarios such as packet buffering or DSP data staging, without adding complexity to the memory controller.

Can the 71V65603S150BGG8 operate with only one power supply instead of separate VDD and VDDQ?

No-the 71V65603S150BGG8 requires two independent 3.3V ±5% supplies: VDD for core logic and VDDQ for I/O drivers. These must be decoupled and routed separately per Renesas layout guidelines. Using a single supply risks violating VIH/VIL thresholds on I/O pins, degrading signal integrity, and potentially causing data corruption during high-speed bursts.

What is the function of the ADV/LD and LBO pins, and how do they interact during burst operation?

ADV/LD controls whether the internal burst counter loads a new external address (ADV/LD = LOW) or increments (ADV/LD = HIGH). LBO selects burst order: LOW for linear (0,1,2,3), HIGH for interleaved (0,2,1,3). During a burst, ADV/LD = HIGH advances the counter each cycle, while LBO remains static-ensuring predictable, hardware-defined address sequencing without software intervention.

Is the 71V65603S150BGG8 pin-compatible with other members of the 71V65603/71V65803 family?

Yes-the 71V65603S150BGG8 shares identical pinout and electrical characteristics with other 71V65603 variants in the same BGG119 package, including speed grades S133 and S166. However, it is not pin-compatible with the 71V65803 (512K × 18), which has different address width (A0–A18) and I/O count (18-bit + 2 parity), requiring PCB redesign for substitution.