Renesas 70V9279L7PRFG

Overview

70V9279L7PRFG from IDT (now 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 left and right ports, 10 ns pipelined cycle time at 100 MHz, LVTTL-compatible 3.3 V ±0.3 V operation, and industrial temperature range (–40°C to +85°C). It serves in real-time interprocessor communication and FPGA co-processor buffering.

For engineers reviewing the 70V9279L7PRFG datasheet, 70V9279L7PRFG pinout, 70V9279L7PRFG application, or 70V9279L7PRFG equivalent, this page delivers verified timing modes (flow-through/pipelined), byte-select control logic, counter-enable functionality, and TQFP-128 package integration details critical for deterministic latency design in embedded control and telecom data path systems.

Technical Context

The 70V9279L7PRFG implements fully synchronous dual-port architecture with independent clock inputs (CLKL/CLKR), separate address/data/control registers per port, and 4 ns setup / 1 ns hold timing on all synchronous inputs. Its dual chip enables (CE0X/CE1X) support depth expansion without external logic, while FT/PIPE pin configures output mode per port-flow-through (tCD1 ≤ 20 ns) or pipelined (tCD2 ≤ 9 ns).

It features integrated address counter with ADS/CNTEN/CNTRST controls, separate upper- and lower-byte enables (UBX/LBX), and automatic power-down via CE-driven standby modes (ISB3 ≤ 3 mA full standby). All I/Os are LVTTL-compatible with VIH ≥ 2.2 V and VIL ≤ 0.8 V at VDD = 3.3 V.

Key Specifications

Pinout & Package

70V9279L7PRFG is housed in a 128-pin Thin Quad Flatpack (TQFP) package with exposed thermal pad (PKG128), measuring 14 mm × 20 mm × 1.4 mm. All VDD pins require local 3.3 V decoupling; all VSS pins must be connected to ground. Pin 1 marked by corner notch or dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AXC and AS7C33256B-10BIN, the 70V9279L7PRFG uniquely combines 10 ns pipelined throughput, per-port output mode selection, and integrated address counter - making it optimal for latency-critical, feature-rich dual-processor architectures requiring minimal glue logic.

Availability

70V9279L7PRFG is available at Aetrix Electronics and suitable for interprocessor communication, FPGA co-processor buffering, and telecom line card data path applications requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant packaging.

Supply support for 70V9279L7PRFG 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 infrastructure.

The 70V9279L7PRFG belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic, low-latency data sharing between heterogeneous processors and programmable logic in industrial, telecom, and aerospace systems.

FAQ

What is the maximum operating frequency of the 70V9279L7PRFG in pipelined mode?

The 70V9279L7PRFG supports up to 100 MHz operation in pipelined output mode, corresponding to a 10 ns clock cycle time (tCYC2). This is validated across the industrial temperature range (–40°C to +85°C) with VDD = 3.3 V ±0.3 V. The device achieves this using registered address/data/control paths and optimized internal timing paths confirmed in AC Electrical Characteristics Table 11a.

Does the 70V9279L7PRFG support independent output modes on left and right ports?

Yes, the 70V9279L7PRFG supports independent output mode selection per port via dedicated FT/PIPEL and FT/PIPER pins. When FT/PIPEX = VIH, the corresponding port operates in pipelined mode (tCD2 ≤ 9 ns); when FT/PIPEX = VIL, it operates in flow-through mode (tCD1 ≤ 20 ns). This allows asymmetric timing configurations tailored to each port's system requirements.

How does the address counter function in the 70V9279L7PRFG?

The 70V9279L7PRFG integrates a per-port address counter controlled by CNTENX and CNTRSTX. When CNTENX = VIL on the rising edge of CLKX, the counter advances automatically. CNTRSTX = VIL resets the counter to address 0. ADSX = VIL loads external address; when ADSX = VIH, the counter value is used. This enables burst sequential access without external address generation logic.

What power-saving features does the 70V9279L7PRFG offer?

The 70V9279L7PRFG provides four standby current modes: ISB1 (both ports TTL-disabled, ≤65 mA), ISB2 (one port active, ≤240 mA), ISB3 (full CMOS standby, ≤3 mA), and ISB4 (one port CMOS-standby, ≤140 mA). These are controlled by CE0X/CE1X voltage levels and input logic states, enabling granular power management without compromising wake-up latency.

Is the 70V9279L7PRFG pin-compatible with other members of the IDT70V92xx family?

The 70V9279L7PRFG shares the same 128-pin TQFP package and core pinout with IDT70V9269 and IDT70V9289, but differs in memory depth (32K vs. 16K vs. 64K) and certain AC timing parameters. A14X is NC on IDT70V9269 but functional on 70V9279L7PRFG. Direct replacement requires verification of address range, timing margins, and counter feature usage in the target design.