Renesas 71V65703S85BQG8

Overview

71V65703S85BQG8 from IDT (now Renesas) is a 9,437,184-bit (9 Mbit) 3.3V synchronous ZBT™ SRAM organized as 256K × 36, delivering zero bus turnaround for high-speed memory subsystems in network switches and telecom line cards. It supports 100 MHz operation with 7.5 ns clock-to-data access, burst read/write capability, and flow-through outputs - enabling seamless back-to-back memory transactions without dead cycles.

For engineers reviewing the 71V65703S85BQG8 datasheet, 71V65703S85BQG8 pinout, 71V65703S85BQG8 application, or 71V65703S85BQG8 equivalent, this page provides verified timing parameters, TQFP-100 pin mapping, ZBT burst control logic, industrial temperature support (–40°C to +85°C), and direct alternatives for memory interface redesigns requiring low-latency, high-bandwidth SRAM.

Technical Context

The 71V65703S85BQG8 implements a synchronous, clocked architecture with registered address/control inputs and flow-through data outputs - eliminating output registers to minimize read latency. Its on-chip burst counter supports both linear and interleaved 4-word bursts, controlled by the static LBO pin and advanced via ADV/LD transitions.

ZBT™ operation is enforced through synchronized chip enable (CE1/CE2/CE2) and R/W control, enabling immediate bus direction reversal between reads and writes. Internally synchronized OE eliminates external timing constraints, while CEN suspends all synchronous activity without disrupting data integrity or output states.

Key Specifications

Pinout & Package

71V65703S85BQG8 is packaged in a JEDEC-standard 100-pin plastic thin quad flatpack (TQFP), 14 mm × 20 mm body size, lead pitch 0.5 mm. Pinout validated per IDT document 5298 drw 02 (256K × 36 PKG100 configuration).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-100BGXI and AS7C3256A-10JIN, the 71V65703S85BQG8 delivers lower read latency, integrated burst control, and true ZBT™ operation - making it optimal for latency-constrained, high-throughput memory interfaces where bus turnaround efficiency is critical.

Availability

71V65703S85BQG8 is available at Aetrix Electronics and suitable for high-speed packet buffering, telecom line card memory, network processor co-processor memory, and industrial real-time control buffer applications requiring stable component supply and long-term industrial temperature support.

Supply support for 71V65703S85BQG8 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

IDT (Integrated Device Technology), now part of Renesas Electronics, is a semiconductor company specializing in high-performance timing, memory interface, and RF solutions for communications and computing infrastructure.

The 71V65703S85BQG8 belongs to IDT's ZBT™ SRAM product line, designed specifically for low-latency, high-bandwidth memory subsystems in networking, telecom, and real-time embedded systems demanding deterministic timing and zero bus turnaround.

FAQ

What is the memory organization of the 71V65703S85BQG8?

The 71V65703S85BQG8 is organized as 256K × 36, providing 9,437,184 bits (9 Mbit) of synchronous SRAM. This configuration is fixed for the 71V65703S85BQG8 variant and differs from the 512K × 18 option found in the 71V65903 family members. The 36-bit data bus supports parallel access to full words without external multiplexing.

Does the 71V65703S85BQG8 support burst read and write operations?

Yes, the 71V65703S85BQG8 supports 4-word burst operations in both linear and interleaved sequences, controlled by the LBO pin and advanced via the ADV/LD signal. Burst mode is initiated after loading an initial address and then incrementing the internal counter - reducing address bus traffic and improving effective bandwidth over single-word transfers.

What is the function of the ZZ pin on the 71V65703S85BQG8?

The ZZ pin on the 71V65703S85BQG8 is an asynchronous sleep mode input. When driven HIGH, it internally gates the clock and places the device in its lowest power consumption state while guaranteeing data retention. This feature enables dynamic power management in systems requiring rapid wake-up with preserved memory contents.

How does the ZBTTM feature improve system performance in the 71V65703S85BQG8?

ZBTTM (Zero Bus Turnaround) in the 71V65703S85BQG8 eliminates idle cycles when switching between read and write operations. By synchronizing bus direction control entirely within the device's internal logic, it enables immediate back-to-back transactions - increasing usable memory bandwidth and reducing average access latency in high-throughput packet processing paths.

Is the 71V65703S85BQG8 compatible with industrial temperature requirements?

Yes, the 71V65703S85BQG8 is rated for industrial temperature operation from –40°C to +85°C. This qualification ensures reliable functionality in harsh environments such as base station equipment, factory automation controllers, and outdoor telecom infrastructure where ambient thermal stress is significant.