Renesas IDT70V7319S166DD

Overview

IDT70V7319S166DD from Integrated Device Technology is a high-speed 256K × 18 (4 Mbit) synchronous bank-switchable dual-ported SRAM with independent left/right ports, 166 MHz operation (4.2 ns access), pipelined/flow-through output mode selection, and dual 3.3 V / 2.5 V I/O voltage support per port. It enables concurrent memory access in telecom line cards and packet buffer applications requiring low-latency inter-port coordination.

For engineers reviewing the IDT70V7319S166DD datasheet, IDT70V7319S166DD pinout, IDT70V7319S166DD application, or IDT70V7319S166DD equivalent, key selection criteria include bank-switchable arbitration timing, dual-voltage I/O configurability via OPT pins, JTAG IEEE 1149.1 compliance, industrial temperature support at 133 MHz, and fpBGA-208 vs. BGA-256 package availability.

Technical Context

This device implements a true SRAM core-not traditional dual-port-enabling bank-switchable access across 64 independent 4K × 18 banks. Each port controls its own bank address (BA0–BA5) and operates fully synchronously with dedicated clock, control, and data registers.

It supports two distinct output modes: pipelined (3.6 ns tCD2 @ 166 MHz) for burst throughput, and flow-through (12 ns tCD1) for minimal latency reads. Counter enable (CNTEN) and repeat (REPEAT) features allow autonomous address sequencing without external logic.

Key Specifications

Pinout & Package

Package: 208-pin fine-pitch Ball Grid Array (fpBGA), 15 mm × 15 mm × 1.4 mm body, 0.8 mm ball pitch. All VDD pins require 3.3 V supply; VDDQ pins must match OPT pin logic level (3.3 V if OPT = VIH, 2.5 V if OPT = VIL).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-ported SRAM applications.

Compared with CY7C1362BV33 and R1EX25618AS-166, the IDT70V7319S166DD uniquely combines bank-switchable arbitration, per-port voltage selection, and integrated address counter logic-reducing external component count and enabling deterministic multi-port memory sharing in bandwidth-constrained systems.

Availability

IDT70V7319S166DD is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and radar signal processing applications requiring stable component supply, long-term lifecycle management, and traceable sourcing.

Supply support for IDT70V7319S166DD 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

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

The IDT70V7319S product line delivers high-bandwidth, low-latency dual-ported SRAMs optimized for telecom, networking, and real-time embedded systems demanding concurrent memory access and deterministic timing.

FAQ

What is the maximum operating frequency of the IDT70V7319S166DD?

The IDT70V7319S166DD supports up to 166 MHz operation in commercial temperature range (0°C to +70°C). At this speed, it achieves a 5 ns clock cycle time in pipelined output mode. Industrial temperature operation (−40°C to +85°C) is rated at 133 MHz maximum, with 7.5 ns cycle time. The 166 MHz grade is not available in the fpBGA-208 package for industrial use.

Does the IDT70V7319S166DD support mixed-voltage I/O operation?

Yes - the IDT70V7319S166DD supports independent I/O voltage selection per port: OPTL configures the left port for either 3.3 V (OPTL = VIH) or 2.5 V (OPTL = VIL), and OPTR does the same for the right port. Corresponding VDDQL and VDDQR supplies must match the selected voltage level. Core VDD remains fixed at 3.3 V.

How does bank-switchable arbitration work in the IDT70V7319S166DD?

The IDT70V7319S166DD divides memory into 64 independent 4K × 18 banks. Each port selects its target bank using BA0–BA5 inputs. If both ports attempt simultaneous access to the same bank, neither access is valid and data corruption may occur. Designers must ensure BA0L–BA5L ≠ BA0R–BA5R to guarantee safe concurrent operation.

What is the purpose of the CNTEN and REPEAT signals in the IDT70V7319S166DD?

CNTEN enables automatic address increment on each clock rising edge, supporting burst transfers without external address generation. REPEAT resets the internal counter to the last valid address loaded via ADS, enabling repeated access to a specific location. Both functions operate independently per port and require no software intervention once configured.

Which package variants are offered for the IDT70V7319S166DD?

The IDT70V7319S166DD is available in two packages: 208-pin fine-pitch BGA (BF208, 15 mm × 15 mm, 0.8 mm pitch) and 256-pin BGA (BC256, 17 mm × 17 mm, 1.0 mm pitch). The 166 MHz speed grade is offered in both packages for commercial use, but only the BC256 package supports 166 MHz in industrial temperature range.