Renesas 70V9079S12PF

Overview

70V9079S12PF from Integrated Device Technology 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 digital signal processors requiring deterministic memory arbitration.

For engineers reviewing the 70V9079S12PF datasheet, 70V9079S12PF pinout, 70V9079S12PF application, or 70V9079S12PF equivalent, key selection criteria include pipelined vs. flow-through output timing, dual-port depth expansion capability via CE0/CE1 control, address counter synchronization across ports, industrial temperature support (–40°C to +85°C), and TQFP-100 package compatibility with high-density PCB layouts.

Technical Context

The 70V9079S12PF 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, enabling independent timing domains. All control, address, and data inputs are registered on the rising edge of their respective clocks, supporting 4ns setup and 1ns hold times.

It supports two configurable output modes: flow-through (FT/PIPE = VIL) with 25ns max tCD1, and pipelined (FT/PIPE = VIH) with 12ns max tCD2 at industrial grade, plus an asynchronous OE for bus isolation. The integrated address counter advances on CNTENL/CNTENR low with automatic reset via CNTRSTL/CNTRSTR.

Key Specifications

Pinout & Package

70V9079S12PF is housed in a 100-pin Thin Quad Flatpack (TQFP) with 0.5mm pitch, body size 14mm × 14mm × 1.4mm, and exposed thermal pad (not electrically connected). All VDD pins require local 3.3V decoupling; all VSS pins must be solidly grounded.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C09449V and R1EX24032AS, the 70V9079S12PF uniquely combines industrial-grade timing (12ns), per-port output mode selection, and integrated address counter - making it optimal for real-time embedded systems requiring both speed and deterministic sequential access without host CPU intervention.

Availability

70V9079S12PF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and network security applications requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.

Supply support for 70V9079S12PF 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, designs high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The 70V9079S12PF belongs to IDT's legacy synchronous dual-port SRAM product line, engineered specifically for deterministic, low-latency shared memory in real-time embedded systems with independent processing domains.

FAQ

What is the maximum operating frequency of the 70V9079S12PF in pipelined mode?

The 70V9079S12PF supports up to 83MHz operation in pipelined output mode, derived from its 12ns maximum clock cycle time (tCYC2) over the industrial temperature range (–40°C to +85°C). This timing is guaranteed with FT/PIPE = VIH and applies independently to left and right ports, enabling concurrent high-throughput data transfers without inter-port timing dependency.

Does the 70V9079S12PF support depth expansion without external logic?

Yes, the 70V9079S12PF supports depth expansion using its dual chip enables (CE0X and CE1X per port). By configuring CE0 and CE1 signals across multiple devices - for example, CE0L = low/CE1L = high for device 1 and CE0L = high/CE1L = low for device 2 - designers achieve seamless 64K × 8 expansion with no additional gates or timing constraints, as confirmed in Truth Table I and Figure 4 of the datasheet.

How does the address counter function in the 70V9079S12PF?

The 70V9079S12PF integrates a 15-bit address counter per port, controlled by CNTENX (enable) and CNTRSTX (reset) inputs. When CNTENX = low on a rising clock edge, the counter increments automatically; CNTRSTX = low resets it to address 0. The counter operates independently of ADSX, allowing continuous sequential access even when external address changes are disabled - critical for DMA buffer management.

What is the difference between flow-through and pipelined output modes on the 70V9079S12PF?

In flow-through mode (FT/PIPE = VIL), data appears at outputs combinatorially after address/control setup, yielding longer access time (25ns max tCD1) but zero-cycle latency. In pipelined mode (FT/PIPE = VIH), outputs are registered, adding one clock cycle of latency but enabling faster cycling (12ns tCD2) and improved timing margin - ideal for systems prioritizing throughput over minimal latency.

Is the 70V9079S12PF pin-compatible with other members of the IDT70V9089/79 family?

The 70V9079S12PF shares identical pinout and package (100-pin TQFP) with IDT70V9089 variants, but A15X is designated NC per datasheet Note 1 - confirming mechanical and electrical compatibility. However, memory depth differs (32K vs. 64K), so software address mapping must account for the reduced capacity; all control, timing, and power specifications remain functionally aligned.