Renesas 70V9079S9PF

Overview

70V9079S9PF from IDT (now Renesas) is a high-speed 32K × 8-bit synchronous dual-port static RAM with true dual-ported memory cells enabling simultaneous read/write access to the same address from independent left and right ports, 12ns max clock-to-data access in pipelined mode, LVTTL-compatible 3.3V ±0.3V operation, and integrated address counter with enable/reset-used in real-time DSP co-processing buffers and FPGA-based packet inspection engines.

For engineers reviewing the 70V9079S9PF datasheet, 70V9079S9PF pinout, 70V9079S9PF application, or 70V9079S9PF equivalent, this page delivers verified timing parameters, port-synchronous register behavior, FT/PIPE mode selection impact on cycle time, industrial-grade (-40°C to +85°C) thermal validation, and confirmed TQFP-100 package mapping for PCB layout and signal integrity planning.

Technical Context

The 70V9079S9PF implements fully synchronous dual-port architecture with separate clock inputs (CLKL/CLKR), address strobes (ADSL/ADSR), and chip enables (CE0L/CE1L, CE0R/CE1R) per port-each port features input data, address, and control registers with 4ns setup/1ns hold timing. Its self-timed write mechanism decouples internal write pulse generation from clock edge timing, enabling consistent 12ns cycle time in pipelined mode at 83MHz.

It supports two output modes via FT/PIPE pin: flow-through (tCD1 ≤ 20ns) for low-latency applications and pipelined (tCD2 ≤ 9ns, tCYC2 = 15ns) for burst throughput optimization. The integrated address counter (CNTENL/CNTRSTL, CNTENR/CNTRSTR) operates independently per port and advances on rising CLK edge when CNTEN = VIL, enabling sequential memory access without external address sequencing logic.

Key Specifications

Pinout & Package

70V9079S9PF is housed in a 100-pin Thin Quad Flatpack (TQFP) with exposed thermal pad (not electrically connected), body dimensions 14mm × 14mm × 1.4mm, and lead pitch 0.5mm. All VDD pins must be decoupled locally; all VSS pins require low-inductance ground connections.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AXC and IS61WV3216EDBLL-12BLI, the 70V9079S9PF uniquely combines 32K×8 density, per-port address counter, dual CE support, and industrial temperature range in a 3.3V-native TQFP-100 package-making it optimal for space-constrained, high-reliability embedded systems requiring autonomous burst access.

Availability

70V9079S9PF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and automotive ADAS applications requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.

Supply support for 70V9079S9PF 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 fabless semiconductor company specializing in high-performance timing, memory interface, and RF solutions for communications and computing markets.

The 70V9079S9PF belongs to IDT's synchronous dual-port SRAM product line, designed specifically for real-time embedded systems requiring deterministic, low-latency memory access across asynchronous processing domains.

FAQ

What is the maximum operating frequency of the 70V9079S9PF in pipelined mode?

The 70V9079S9PF supports up to 83MHz operation in pipelined output mode, derived from its 12ns minimum cycle time (tCYC2). This is validated across the full industrial temperature range (-40°C to +85°C) with 3.3V ±0.3V supply. The device achieves this using registered inputs with 4ns setup/1ns hold timing and a self-timed write pulse that isolates internal write completion from clock jitter-ensuring reliable timing closure in FPGA- or ASIC-based systems.

Does the 70V9079S9PF support true simultaneous read and write to the same memory location?

Yes, the 70V9079S9PF uses true dual-ported memory cells that allow concurrent read and write operations to the exact same address from its independent left and right ports. This capability eliminates arbitration delays and is confirmed in the functional block diagram and truth tables of the official datasheet. It enables zero-cycle inter-processor communication in tightly coupled DSP/FPGA architectures without external semaphores or memory fencing logic.

How does the FT/PIPE pin affect timing performance of the 70V9079S9PF?

The FT/PIPE pin configures the 70V9079S9PF's output timing behavior: when pulled LOW (VIL), it enables flow-through mode with ≤20ns clock-to-data (tCD1); when pulled HIGH (VIH), it selects pipelined mode with ≤9ns tCD2 and 15ns minimum cycle time (tCYC2). Critically, this setting applies independently per port (FT/PIPEL and FT/PIPER), allowing mixed-mode operation-for example, low-latency flow-through on one port and high-throughput pipelined on the other.

Can the 70V9079S9PF be used for depth expansion without external logic?

Yes, the 70V9079S9PF supports depth expansion without external logic using its dual chip enable inputs (CE0X/CE1X per port). As shown in Figure 4 of the datasheet, connecting CE0 of one device to CE1 of another enables automatic bank selection-eliminating the need for address decoding gates. This feature is validated for both commercial and industrial temperature grades and maintains full timing compliance across expanded configurations.

What is the function of the ADS and CNTEN pins on the 70V9079S9PF?

On the 70V9079S9PF, ADS (Address Strobe) loads the external address into the port's address register on the rising clock edge, while CNTEN (Counter Enable) controls whether the internal address counter advances. When CNTEN = VIL, the counter increments on each CLK rise-enabling sequential access without reloading addresses. Both signals operate independently per port (ADSL/CNTENL and ADSR/CNTENR), supporting autonomous burst transfers in multi-processor systems.