Renesas 70V9279L12PRFI8

Overview

70V9279L12PRFI8 from IDT (now part of Renesas) is a high-speed, 32K × 16-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. It operates at 10 ns cycle time (100 MHz) in pipelined mode, supports industrial temperature range (–40°C to +85°C), and uses a single 3.3 V ±0.3 V supply. It is used in real-time inter-processor communication, network packet buffering, and FPGA co-processor data exchange.

For engineers reviewing the 70V9279L12PRFI8 datasheet, 70V9279L12PRFI8 pinout, 70V9279L12PRFI8 application, or 70V9279L12PRFI8 equivalent, this page delivers verified timing parameters, port-to-port delay behavior, flow-through vs. pipelined output mode trade-offs, byte-select control logic, and industrial-grade power consumption metrics under both active and full-standby conditions.

Technical Context

The 70V9279L12PRFI8 implements fully synchronous operation on both ports with 4 ns setup and 1 ns hold times for all inputs relative to clock. It features separate address strobe (ADS), counter enable (CNTEN), and counter reset (CNTRST) signals per port, enabling autonomous address generation without external logic.

Its dual chip enables (CE0/CE1 per port) support depth expansion without glue logic, while independent upper-byte (UB) and lower-byte (LB) controls allow multiplexed bus compatibility. The FT/PIPE pin selects between flow-through (tCD1 ≤ 20 ns) and pipelined (tCD2 ≤ 9 ns) output modes - the latter delivering faster throughput at the cost of one-cycle latency.

Key Specifications

Pinout & Package

70V9279L12PRFI8 is housed in a 128-pin Thin Quad Flatpack (TQFP) package measuring 14 mm × 20 mm × 1.4 mm, with exposed thermal pad (not electrically connected). All VDD pins require local decoupling; all VSS pins must be solidly grounded.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1370D-100AXC and IS61WV102416BLL-10MLI, the 70V9279L12PRFI8 uniquely combines pipelined 100 MHz throughput, per-port address counters, and industrial temperature rating - making it irreplaceable in deterministic, low-latency dual-processor architectures where clock domain crossing must be hardware-managed.

Availability

70V9279L12PRFI8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and broadcast video equipment requiring stable component supply across extended product lifecycles.

Supply support for 70V9279L12PRFI8 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, designs high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The 70V9279L12PRFI8 belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered specifically for deterministic, low-latency inter-processor communication in real-time embedded systems.

FAQ

What is the maximum guaranteed clock frequency for 70V9279L12PRFI8 in pipelined mode?

The 70V9279L12PRFI8 is rated for 100 MHz operation in pipelined mode, corresponding to a maximum clock cycle time (tCYC2) of 10 ns. This specification is guaranteed over the full industrial temperature range (–40°C to +85°C) and 3.3 V ±0.3 V supply, with all timing parameters including tCH2 ≥ 4 ns and tCL2 ≥ 4 ns met under worst-case conditions.

Does 70V9279L12PRFI8 support simultaneous read and write to the same memory location?

Yes, the 70V9279L12PRFI8 uses true dual-ported memory cells that permit simultaneous read from one port and write to the same address on the other port. This capability is fundamental to its role in real-time inter-processor communication and is explicitly validated in the functional block diagram and Truth Table I of the datasheet.

How does the FT/PIPE pin affect timing behavior of 70V9279L12PRFI8?

The FT/PIPE pin configures the output path: when driven high (VIH), it enables pipelined mode (tCD2 ≤ 9 ns, tCYC2 = 10 ns); when low (VIL), it enables flow-through mode (tCD1 ≤ 20 ns, tCYC1 = 25 ns). Critically, CE0/CE1 become double-buffered in pipelined mode - requiring two clock cycles to deselect - which must be accounted for in state-machine design.

What is the minimum port-to-port delay (tCWDD) for reliable data transfer between ports of 70V9279L12PRFI8?

The maximum guaranteed port-to-port delay (tCWDD) for the 70V9279L12PRFI8 is 35 ns under commercial conditions and matches the industrial spec. This parameter defines the minimum clock skew or setup margin required when writing on one port and reading the result on the other - essential for designing deterministic handshake protocols without race conditions.

Can the address counter in 70V9279L12PRFI8 operate independently on left and right ports?

Yes, the 70V9279L12PRFI8 provides fully independent address counter control per port via dedicated CNTENL/CNTRSTL and CNTENR/CNTRSTR pins. Each counter advances on its respective clock edge when CNTENX = VIL, and resets to address 0 when CNTRSTX = VIL - enabling autonomous ring-buffer management without CPU intervention on either side.