Renesas 70V9269L12PRFGI8

Overview

70V9269L12PRFGI8 from IDT (now Renesas) is a high-speed 32K × 16-bit synchronous dual-port SRAM 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 supply, and industrial temperature range (–40°C to +85°C), used in real-time DSP co-processing and packet buffering in telecom line cards.

For engineers reviewing the 70V9269L12PRFGI8 datasheet, 70V9269L12PRFGI8 pinout, 70V9269L12PRFGI8 application, or 70V9269L12PRFGI8 equivalent, key selection criteria include pipelined vs. flow-through output mode timing, port-to-port delay (tCWDD ≤ 40 ns), dual chip enable depth expansion capability, counter-enable/counter-reset functionality, and TQFP-128 package thermal and layout compatibility.

Technical Context

This device implements fully synchronous dual-port operation on both left and right interfaces, with registered address, data, and control inputs requiring only 4 ns setup and 1 ns hold relative to clock. It supports independent flow-through or pipelined output modes per port via dedicated FT/PIPE pins, enabling optimized latency or throughput trade-offs in asymmetric data paths.

The integrated address counter allows automatic sequential addressing without external logic-enabled by CNTEN and reset by CNTRST-and operates independently per port. Separate upper-byte (UB) and lower-byte (LB) controls support multiplexed bus interfacing and byte-level write masking, critical for legacy bus matching and partial-word updates.

Key Specifications

Pinout & Package

70V9269L12PRFGI8 is housed in a 128-pin TQFP package (JEDEC MO-220, package code PKG128) with exposed thermal pad. Pin functions are strictly symmetric between left (L) and right (R) ports, including dual clocks (CLKL/CLKR), dual chip enables (CE0L/CE0R, CE1L/CE1R), and independent flow-through/pipeline controls (FT/PIPEL/FT/PIPER).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AXC and AS7C33256PFSIG, the 70V9269L12PRFGI8 uniquely integrates address counter control and dual-mode (flow-through/pipelined) output timing within the 128-pin TQFP footprint, making it optimal for latency-critical, burst-oriented embedded systems where minimizing external logic is essential.

Availability

70V9269L12PRFGI8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and avionics subsystems requiring stable component supply across extended product lifecycles and rigorous environmental qualification.

Supply support for 70V9269L12PRFGI8 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 markets.

The 70V9269L12PRFGI8 belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for real-time inter-processor communication, packet buffering, and deterministic data exchange in multi-clock-domain systems.

FAQ

What is the maximum operating frequency of the 70V9269L12PRFGI8 in pipelined mode?

The 70V9269L12PRFGI8 supports up to 100 MHz operation in pipelined output mode, corresponding to a guaranteed maximum clock cycle time of 20 ns (tCYC2 ≤ 20 ns) over the full industrial temperature range (–40°C to +85°C). This timing is validated under worst-case voltage (3.0 V) and temperature conditions, ensuring robust performance in demanding embedded environments.

Does the 70V9269L12PRFGI8 support independent flow-through and pipelined modes on each port?

Yes, the 70V9269L12PRFGI8 supports independent output mode selection per port via dedicated FT/PIPEL (left) and FT/PIPER (right) pins. When driven low, each port operates in flow-through mode (tCD1 ≤ 25 ns); when high, it switches to pipelined mode (tCD2 ≤ 12 ns), enabling mixed-mode configurations for asymmetric latency requirements.

How does the address counter function in the 70V9269L12PRFGI8, and what signals control it?

The 70V9269L12PRFGI8 includes a per-port address counter controlled by ADS (address strobe) and CNTEN (counter enable). When ADS = VIH and CNTEN = VIL on the rising clock edge, the internal address increments automatically. CNTRST resets the counter to address 0. These functions operate independently on left and right ports, enabling autonomous burst transfers without host intervention.

What is the significance of dual chip enables (CE0 and CE1) on each port of the 70V9269L12PRFGI8?

The dual chip enables (CE0X and CE1X, where X = L/R) on the 70V9269L12PRFGI8 implement a two-input enable logic: the port activates only when CE0X = VIL and CE1X = VIH. This allows direct depth expansion - for example, cascading two devices to create a 64K×16 memory - using CE1 of one device as CE0 of the next, eliminating external decoding logic and reducing propagation delay.

Can the 70V9269L12PRFGI8 perform simultaneous read and write operations on the same memory location?

Yes, the 70V9269L12PRFGI8 uses true dual-ported SRAM cells that allow simultaneous read from one port and write to the same address on the other port. This capability is fundamental to its role in inter-processor communication and real-time buffering, with port-to-port delay (tCWDD) specified at ≤ 40 ns to ensure deterministic data visibility across ports.