Renesas 70V9179L7PF8

Overview

70V9179L7PF8 from Renesas Electronics is a high-speed 32K × 9-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, 12 ns pipelined cycle time (83 MHz operation), LVTTL-compatible 3.3 V ±0.3 V supply, and integrated address counters for burst-mode applications in telecom switching fabric and real-time DSP buffers.

For engineers reviewing the 70V9179L7PF8 datasheet, 70V9179L7PF8 pinout, 70V9179L7PF8 application, or 70V9179L7PF8 equivalent, key selection criteria include pipelined vs. flow-through output mode configuration via FT/PIPE pins, dual chip-enable architecture for depth expansion without external logic, counter enable/reset functionality, and industrial-grade timing compliance at 0°C to +70°C ambient.

Technical Context

The 70V9179L7PF8 implements fully synchronous operation on both ports with 4 ns setup / 0 ns hold timing on all control, address, and data inputs, using edge-triggered registers clocked on the rising CLK edge. Its self-timed internal write pulse operates independently of clock low-to-high transition, enabling minimal cycle time.

It supports two configurable output modes: pipelined (7.5 ns clock-to-data, 12 ns cycle time) and flow-through (18 ns clock-to-data, 22 ns cycle time), selected per port via dedicated FT/PIPE pins. Address strobe (ADS) and counter enable (CNTEN) signals allow dynamic address generation or external address loading without bus contention.

Key Specifications

Pinout & Package

70V9179L7PF8 is housed in a 100-pin Thin Quad Flatpack (TQFP) with 0.5 mm pitch, 14 mm × 14 mm body size, and 1.4 mm maximum height. All VDD and VSS pins must be decoupled locally per datasheet layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1370D-133AXC and AS7C33256P-12JCIN, the 70V9179L7PF8 uniquely integrates address counter logic and per-port output mode selection - reducing external component count and enabling flexible burst-mode memory access without sacrificing 83 MHz throughput.

Availability

70V9179L7PF8 is available at Aetrix Electronics and suitable for telecom switching fabric, DSP real-time buffering, industrial motion control, and test equipment data capture requiring stable component supply across production lifecycles.

Supply support for 70V9179L7PF8 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

Renesas Electronics Corporation is a global semiconductor leader delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications.

The 70V9179L7PF8 belongs to Renesas' legacy IDT dual-port SRAM product line, engineered specifically for high-bandwidth, low-latency synchronous memory subsystems in real-time communication and control systems.

FAQ

What is the maximum operating frequency of the 70V9179L7PF8 in pipelined mode?

The 70V9179L7PF8 achieves a maximum operating frequency of 83 MHz in pipelined output mode, corresponding to a 12 ns clock cycle time as specified in the AC Electrical Characteristics table under commercial temperature conditions (0°C to +70°C). This performance is guaranteed with proper PCB layout, decoupling, and 3.3 V ±0.3 V supply regulation.

Does the 70V9179L7PF8 support independent output modes on left and right ports?

Yes, the 70V9179L7PF8 supports independent output mode selection per port via the dedicated FT/PIPEL and FT/PIPER pins. Setting FT/PIPEL = VIH configures the left port for pipelined operation (7.5 ns clock-to-data), while FT/PIPER = VIL configures the right port for flow-through mode (18 ns clock-to-data), enabling mixed-mode system architectures.

How does the address counter function in the 70V9179L7PF8?

The 70V9179L7PF8 includes independent address counters per port, enabled by asserting CNTENL or CNTENR low. On each rising CLK edge, the counter increments the internal address by one, allowing sequential burst access without external address generation. Counter reset is performed synchronously via CNTRSTL/CNTRSTR.

What power-saving features does the 70V9179L7PF8 provide?

The 70V9179L7PF8 offers multiple power-saving mechanisms: full standby current drops to 0.4 mA typical when both ports are disabled (CE0 and CE1 inactive), and active power consumption is limited to 500 mW typical. Dual chip enables permit selective port shutdown, reducing dynamic power during partial utilization.

Is the 70V9179L7PF8 pin-compatible with other speed grades in the same family?

Yes, the 70V9179L7PF8 shares identical pinout and package (100-pin TQFP) with other members of the 70V9179L family including 70V9179L9 and 70V9179L12. Speed grade differences affect only timing parameters - no PCB redesign is required when upgrading or downgrading within this family for footprint compatibility.