Renesas 709269S12PF8

Overview

709269S12PF8 from Integrated Device Technology is a 16K × 16-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 max clock-to-data access (pipelined mode), 20ns clock cycle time, and industrial temperature support (–40°C to +85°C). It serves as shared memory buffer in real-time DSP systems requiring deterministic low-latency inter-processor communication.

For engineers reviewing the 709269S12PF8 datasheet, 709269S12PF8 pinout, 709269S12PF8 application, or 709269S12PF8 equivalent, key selection criteria include pipelined vs. flow-through output timing, dual chip enable for depth expansion, separate upper/lower byte controls, counter enable/reset functionality, and TTL-compatible 5V ±10% operation with industrial-grade thermal stability.

Technical Context

The 709269S12PF8 implements fully synchronous operation on both ports with 4ns setup/1ns hold on all inputs, using edge-triggered registers for address, data, and control signals. Its self-timed write architecture decouples internal write pulse generation from clock edge timing, enabling fast cycle times independent of clock duty cycle.

It supports two distinct output modes-flow-through (no latency) and pipelined (1-cycle latency)-selected per port via dedicated FT/PIPE pins. Dual chip enables (CE0/CE1) allow seamless depth expansion without external logic, while ADS, CNTEN, and CNTRST provide precise address counter control for burst-mode sequential access.

Key Specifications

Pinout & Package

100-pin Thin Quad Flatpack (TQFP), PN100 package with 0.5mm pitch, body size 14mm × 14mm × 1.4mm. All VCC and GND pins must be connected per datasheet layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AXC and IDT70V9269S12PF, the 709269S12PF8 offers guaranteed industrial temperature operation and native 5V compatibility - making it optimal for legacy industrial systems where voltage translation or requalification is cost-prohibitive.

Availability

709269S12PF8 is available at Aetrix Electronics and suitable for real-time DSP interfacing, industrial motion control, telecom line card buffering, and avionics data concentrators requiring stable component supply across extended product lifecycles.

Supply support for 709269S12PF8 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, specialized in high-performance timing, memory, and interface ICs for communications, computing, and industrial markets.

The IDT7092xx family was designed specifically for deterministic, low-latency shared memory applications in asymmetric multiprocessing systems - emphasizing simultaneous dual-port access, configurable timing modes, and industrial reliability.

FAQ

What is the maximum operating frequency of the 709269S12PF8 in pipelined mode?

The 709269S12PF8 supports up to 50MHz operation in pipelined mode, derived from its 20ns maximum clock cycle time (tCYC2). This enables sustained 50 million read/write operations per second per port, validated across the full industrial temperature range (–40°C to +85°C) with 5V ±10% supply.

Does the 709269S12PF8 support independent output modes on left and right ports?

Yes, the 709269S12PF8 provides independent FT/PIPEL and FT/PIPER pins, allowing the left port to operate in flow-through mode (0-cycle latency) while the right port runs in pipelined mode (1-cycle latency), or vice versa - enabling mixed-latency system architectures without external logic.

How does the address counter function in the 709269S12PF8, and what triggers it?

The 709269S12PF8 includes independent address counters per port, enabled by asserting CNTENL or CNTENR LOW on the rising edge of CLK. When enabled, the counter automatically increments the internal address after each access; CNTRSTL/CNTRSTR LOW resets it to address 0 - eliminating need for external address generation logic.

Can the 709269S12PF8 be used in depth-expanded configurations, and what pins enable this?

Yes, the 709269S12PF8 supports depth expansion using its dual chip enables (CE0/CE1 per port). By tying CE0 of one device to CE1 of another and controlling them with decoded higher-order address bits, multiple 709269S12PF8 devices can be stacked without external gate logic - as confirmed in Truth Table I and Figure 4 of the datasheet.

Is the 709269S12PF8 still recommended for new designs, and what is its obsolescence status?

The 709269S12PF8 is marked "not recommended for new designs" per the datasheet's preliminary note, though actively supported for legacy program continuity. IDT70V9269S12PF is the functionally identical, pin-compatible successor with enhanced manufacturing yield and long-term availability - recommended for all new designs requiring the same specifications.