Renesas 70V9359L7PFI8

Overview

70V9359L7PFI8 from Integrated Device Technology is a high-speed 8K × 18-bit synchronous dual-port static RAM with true dual-ported memory cells, pipelined/flow-through output modes, and full synchronous operation on both ports. It operates at 3.3V ±0.3V, supports 10ns cycle time (100MHz) in pipelined mode, and delivers 6.5ns clock-to-data access. It is used in real-time digital signal processing systems requiring concurrent read/write access to shared memory buffers.

For engineers reviewing the 70V9359L7PFI8 datasheet, 70V9359L7PFI8 pinout, 70V9359L7PFI8 application, or 70V9359L7PFI8 equivalent, this page provides verified functional identity, industrial-grade timing specs (–40°C to +85°C), TQFP-100 package mapping, and confirmed alternative parts for legacy design continuity and obsolescence mitigation.

Technical Context

The 70V9359L7PFI8 implements fully registered synchronous interfaces on both left and right ports, with 3.5ns setup and 0ns hold times for address, control, and data inputs relative to CLK rise. Its self-timed write architecture enables fast cycle times independent of clock low time, while dual chip enables (CE0/CE1) support depth expansion without external logic.

It features configurable output modes via FT/PIPE pins: pipelined mode yields 6.5ns clock-to-data out and 10ns cycle time; flow-through mode offers 15ns clock-to-data out with 19ns minimum cycle time. Address counters with CNTEN/CNTRST enable burst-mode sequential addressing without external address generation.

Key Specifications

Pinout & Package

70V9359L7PFI8 is housed in a 100-pin Thin Quad Flatpack (TQFP) package, body size 14mm × 14mm × 1.4mm, lead finish SnPb (EOL). All VDD and VSS pins must be individually decoupled per datasheet layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT70V25L15PF and CY7C028V-15AXC, the 70V9359L7PFI8 uniquely combines industrial temperature support, pipelined/flow-through mode flexibility, dual CE for expansion, and integrated address counter - making it irreplaceable in high-reliability, high-throughput dual-access memory systems without layout or firmware rework.

Availability

70V9359L7PFI8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, real-time DSP, and avionics data acquisition requiring stable component supply amid end-of-life transitions.

Supply support for 70V9359L7PFI8 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, and RF power solutions for communications and computing markets.

The IDT70V9359/49 product line was engineered for high-performance, low-latency dual-access memory in real-time embedded systems - targeting applications demanding concurrent read/write, deterministic timing, and industrial environmental resilience.

FAQ

What is the maximum operating frequency of the 70V9359L7PFI8 in pipelined mode?

The 70V9359L7PFI8 supports up to 100MHz operation in pipelined output mode, corresponding to a 12ns maximum clock cycle time (tCYC2) over the industrial temperature range (–40°C to +85°C). This is validated by AC electrical characteristics in the official datasheet and applies when FT/PIPE = VIH on the active port. The device achieves this using self-timed write and fully registered synchronous inputs.

Does the 70V9359L7PFI8 support true simultaneous access to the same memory location from both ports?

Yes, the 70V9359L7PFI8 uses true dual-ported memory cells that permit simultaneous, independent read and write operations to the same address location - one port reading while the other writes. This capability is fundamental to its use in producer-consumer architectures such as telecom buffering and real-time DSP pipelines, and is explicitly confirmed in the Functional Block Diagram and Description sections of the datasheet.

What is the function of the CNTEN and CNTRST pins on the 70V9359L7PFI8?

CNTEN (Counter Enable) and CNTRST (Counter Reset) pins on the 70V9359L7PFI8 control an on-chip hardware address counter. When CNTEN = VIL, the counter advances automatically on each CLK rise; CNTRST = VIL resets the counter to address 0. This enables burst-mode sequential memory access without CPU or external logic involvement - a key feature for efficient data streaming in applications like radar signal processing or packet forwarding.

Is the 70V9359L7PFI8 pin-compatible with other members of the IDT70V93xx family?

No, the 70V9359L7PFI8 is not fully pin-compatible with all IDT70V93xx variants. While it shares the 100-pin TQFP footprint with IDT70V9349L7PFI8, pin functions differ - notably A12 is no-connect on IDT70V9349 but functional on 70V9359L7PFI8. Other variants (e.g., fpBGA-packaged versions) have entirely different pinouts. Direct substitution requires verification of address width, pin mapping, and timing behavior per datasheet Table 1 and Pin Configurations.

What power-saving features does the 70V9359L7PFI8 offer in standby mode?

The 70V9359L7PFI8 provides multiple standby modes: ISB1 (both ports disabled) draws 40mA typ at industrial temperature; ISB2 (one port active) draws 105mA typ; and ISB3 (full CMOS standby) consumes only 0.5mA typ. Power-down is controlled per port via CE0/CE1 - asserting CE0 = VIH or CE1 = VIL disables internal circuitry. These modes are specified in Table 9 of the datasheet and support energy-efficient operation in battery-backed or thermally constrained systems.