Renesas 71V65603S133BGG8

Overview

71V65603S133BGG8 from Renesas Electronics is a 256K × 36-bit (9.44 Mbit), 3.3V synchronous ZBT™ SRAM with zero bus turnaround, 133 MHz clock operation (7.5 ns cycle time), pipelined outputs, and 4-word burst capability. It features synchronous address/control/data registers, individual byte write enables (BW1–BW4), and three chip enables for depth expansion - deployed in high-speed packet buffering, network switch fabric, and real-time DSP memory subsystems.

For engineers reviewing the 71V65603S133BGG8 datasheet, 71V65603S133BGG8 pinout, 71V65603S133BGG8 application, or 71V65603S133BGG8 equivalent, key selection criteria include ZBT™ timing compliance, TQFP-100 vs. BGA-119 package compatibility, 3.3V I/O supply (VDDQ) decoupling requirements, and industrial temperature support (–40°C to +85°C) for telecom infrastructure designs.

Technical Context

This SRAM implements a fully synchronous, pipelined architecture where address and control signals are registered on the rising CLK edge, with data access occurring two cycles later. The ZBT™ feature eliminates dead cycles between read/write transitions by internally synchronizing output buffer enable - removing external OE timing constraints.

Burst operation is controlled via ADV/LD and LBO pins: ADV/LD loads new addresses (low) or increments the internal counter (high); LBO selects linear (LBO = VSS) or interleaved (LBO = VDD) 4-word sequences. Chip select uses three enables (CE1, CE2 low; CE2 high), enabling flexible depth expansion without external logic.

Key Specifications

Pinout & Package

71V65603S133BGG8 is packaged in a 119-ball fine-pitch BGA (BGG119), JEDEC MO-245 compliant, with 0.8 mm ball pitch and 12 mm × 12 mm body size. Thermal pad exposed on underside for enhanced heat dissipation in sustained burst operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362KV18 and AS7C33128PFSI, the 71V65603S133BGG8 uniquely delivers 36-bit ZBT™ operation at 133 MHz in industrial-grade BGA packaging - making it irreplaceable in high-throughput, mixed-access telecom and networking memory subsystems.

Availability

71V65603S133BGG8 is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, and industrial motion controller FIFO applications requiring stable component supply, long-term lifecycle assurance, and industrial temperature qualification.

Supply support for 71V65603S133BGG8 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 71V65603S133BGG8 belongs to Renesas' high-speed ZBT™ SRAM product line, engineered specifically for zero-latency memory subsystems in carrier-grade networking and real-time embedded systems.

FAQ

What is the maximum operating frequency of the 71V65603S133BGG8?

The 71V65603S133BGG8 is rated for 133 MHz operation (7.5 ns clock cycle), supporting sustained 532 MB/s peak bandwidth in 4-word burst mode. This frequency is guaranteed over the full industrial temperature range (–40°C to +85°C) with VDD and VDDQ at 3.3 V ±5%. Timing margins assume proper PCB layout, termination, and decoupling per Renesas Application Note AN-71V65603.

Does the 71V65603S133BGG8 support true ZBT™ operation with no dead cycles between reads and writes?

Yes, the 71V65603S133BGG8 implements genuine ZBT™ (Zero Bus Turnaround) functionality as defined by Renesas. When transitioning between read and write operations - or vice versa - the device requires zero idle cycles. This is achieved through internal synchronization of the output buffer enable and pipelined address/control registration, confirmed in the functional truth table and timing diagrams of the official datasheet Rev. 6.42.

What package type does the 71V65603S133BGG8 use, and is it pin-compatible with other variants in the 71V65603 family?

The 71V65603S133BGG8 uses a 119-ball fine-pitch BGA (BGG119) package with 0.8 mm pitch and 12 mm × 12 mm body. It is not pin-compatible with the TQFP-100 (PKG100) or 165-ball fBGA (BQG165) variants - each has distinct ball/pin mapping, power distribution, and thermal pad configuration. Migration requires full PCB redesign and signal integrity revalidation.

How does the burst addressing work on the 71V65603S133BGG8, and what controls the sequence order?

Burst addressing on the 71V65603S133BGG8 is controlled by the ADV/LD and LBO pins. ADV/LD = LOW loads an external address; ADV/LD = HIGH advances the internal 2-bit burst counter. LBO selects sequence order: LOW enables linear burst (A0, A1, A2, A3); HIGH enables interleaved burst (A0, A2, A1, A3). The counter wraps automatically after four words, and LBO must remain static during burst execution.

Can the 71V65603S133BGG8 operate in low-power mode, and how is it activated?

Yes, the 71V65603S133BGG8 supports asynchronous sleep mode via the ZZ pin. Driving ZZ HIGH gates the internal clock and reduces active current to ≤5 mA while retaining memory contents. No clock is required during sleep, and exit is immediate upon ZZ returning LOW - verified under industrial temperature conditions with VDD/VDDQ at 3.3 V ±5%.