Renesas 709079L12PFI8

Overview

709079L12PFI8 from Integrated Device Technology is a 32K × 8-bit synchronous dual-port static RAM with true dual-ported memory cells enabling simultaneous access to the same address from left and right ports, 12ns maximum clock-to-data access in pipelined mode, industrial temperature range (–40°C to +85°C), and TTL-compatible 5V ±10% supply - deployed in high-reliability embedded control and real-time data buffering systems.

For engineers reviewing the 709079L12PFI8 datasheet, 709079L12PFI8 pinout, 709079L12PFI8 application, or 709079L12PFI8 equivalent, key selection criteria include pipelined vs. flow-through output mode configuration via FT/PIPE pin, dual chip enable architecture for depth expansion without external logic, and low-power standby current of 1mA (typ.) in L-grade operation.

Technical Context

This device implements fully synchronous operation on both ports with 4ns setup and 1ns hold times on all control, address, and data inputs. It integrates independent address strobe (ADS), counter enable (CNTEN), and counter reset (CNTRST) signals per port to support burst-mode addressing and automatic address incrementing.

The memory supports two configurable output modes: flow-through (FT/PIPE = VIL) with 25ns cycle time, or pipelined (FT/PIPE = VIH) with 20ns cycle time and 9ns clock-to-data delay. Self-timed write enables fast cycle completion independent of clock edge timing.

Key Specifications

Pinout & Package

709079L12PFI8 is housed in a 100-pin TQFP (PN100) package with exposed thermal pad. All VCC pins must be connected to 5V supply; all GND pins tied to ground. Pin 1 is marked by black dot; package body measures approximately 14mm × 14mm × 1.4mm.

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 IDT70V9079L12PFI, the 709079L12PFI8 provides native 5V operation, integrated address counter, and pinout compatibility within the IDT709079 family - making it the sole option for drop-in replacement in existing industrial 5V dual-port memory systems.

Availability

709079L12PFI8 is available at Aetrix Electronics and suitable for motor control systems, real-time data loggers, avionics display interfaces, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 709079L12PFI8 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, RF, and sensor solutions for communications, computing, and industrial markets.

The IDT709079 family was designed specifically for high-reliability, low-latency dual-ported memory applications in real-time embedded systems - emphasizing simultaneous access, deterministic timing, and industrial-grade robustness.

FAQ

What does the 'L' in 709079L12PFI8 signify?

The 'L' in 709079L12PFI8 denotes the low-power variant of the IDT709079 family. It specifies a typical standby current of 1mA (ISB3) versus 5mA for the 'S' (standard power) version, achieved through optimized CMOS process and internal power gating - critical for thermally constrained industrial deployments where the 709079L12PFI8 operates.

Is 709079L12PFI8 pin-compatible with other IDT709079 speed grades?

Yes, 709079L12PFI8 is pin-compatible with other IDT709079 variants including 709079L9PFI8 and 709079L15PFI8. All share identical 100-pin TQFP (PN100) packaging, pin functions, and electrical interface - allowing speed-grade substitution without PCB changes, provided timing margins accommodate the selected access time.

How does the address counter function in 709079L12PFI8?

The 709079L12PFI8 features independent address counters per port, controlled by CNTENL/CNTRSTL (left) and CNTENR/CNTRSTR (right). When CNTEN = VIL on CLK rise, the counter advances regardless of CE state; CNTRST = VIL resets to address 0. This enables efficient sequential access in applications like FIFOs without external address generation logic - a core capability of the 709079L12PFI8.

What is the role of the FT/PIPE pin in 709079L12PFI8 operation?

The FT/PIPE pin configures the output timing mode: VIH selects pipelined mode (9ns tCD2, 20ns tCYC2), while VIL selects flow-through mode (25ns tCD1, 30ns tCYC1). This DC-level selection determines whether output data is registered on the next clock edge (pipelined) or appears combinatorially after address setup (flow-through) - directly impacting system timing closure in the 709079L12PFI8 implementation.

Does 709079L12PFI8 support depth expansion without external logic?

Yes, 709079L12PFI8 supports depth expansion using its dual chip enables (CE0X/CE1X per port). By tying CE0 of one device to CE1 of the next and decoding higher-order address bits, multiple 709079L12PFI8 units can be stacked to increase memory depth - eliminating need for external address decoders or glue logic in scalable buffer architectures.