Renesas 709269L15PF8

Overview

709269L15PF8 from Integrated Device Technology is a 256K (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, 15ns clock-to-data access in pipelined mode, TTL-compatible 5V ±10% operation, and industrial temperature range (–40°C to +85°C). It serves as a high-speed on-chip buffer or inter-processor communication memory in real-time embedded control systems.

For engineers reviewing the 709269L15PF8 datasheet, 709269L15PF8 pinout, 709269L15PF8 application, or 709269L15PF8 equivalent, key selection criteria include pipelined vs. flow-through output timing, dual chip enable support for depth expansion, separate upper/lower byte controls for multiplexed bus compatibility, and low-power standby current of 1mW (typ.) in the L-grade variant.

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. Its internal architecture includes dual address/data/control registers per port, self-timed write logic, and independent address counters with counter enable/reset pins (CNTENL/CNTRSTL and CNTENR/CNTRSTR).

The FT/PIPE pin selects between flow-through (no latency) and pipelined (1-cycle latency, 15ns cycle time at 67MHz) output modes per port. Dual chip enables (CE0X/CE1X) allow depth expansion without external logic, while separate UBX/LBX signals support byte-level write masking and bus-matching in 32-bit or wider systems.

Key Specifications

Pinout & Package

100-pin Thin Quad Flatpack (TQFP), PN100 package, body size 14mm × 14mm × 1.4mm; all VCC and GND pins require proper decoupling per datasheet layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV-15ZXI and IDT70V9269L15PF, the 709269L15PF8 uniquely delivers 5V TTL compatibility, 1mW standby power, and industrial temperature operation in a single monolithic solution - making it irreplaceable in legacy 5V industrial control hardware where voltage translation or redesign is prohibitive.

Availability

709269L15PF8 is available at Aetrix Electronics and suitable for motor control co-processor interfaces, DSP-based digital signal buffering, and redundant PLC memory modules requiring stable component supply and long-term obsolescence management.

Supply support for 709269L15PF8 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 power management ICs for communications, computing, and industrial markets.

The IDT7092xx family was designed specifically for high-reliability, real-time inter-processor communication and shared-memory buffering in industrial automation, aerospace, and test equipment - emphasizing deterministic timing, dual-port concurrency, and robust 5V operation.

FAQ

What is the maximum operating frequency of the 709269L15PF8 in pipelined mode?

The 709269L15PF8 supports a maximum operating frequency of 67MHz in pipelined output mode, derived from its 15ns clock cycle time (tCYC2). This timing is guaranteed across the full industrial temperature range (–40°C to +85°C) and 5.0V ±10% supply, with all AC parameters validated per the official IDT datasheet DSC-3243/16.

Does the 709269L15PF8 support independent flow-through and pipelined modes on each port?

Yes, the 709269L15PF8 supports independent output mode selection per port via dedicated FT/PIPEL and FT/PIPER pins. When FT/PIPEX = VIL, the corresponding port operates in flow-through mode (zero latency); when FT/PIPEX = VIH, it operates in pipelined mode (15ns cycle time, 67MHz). Both modes are simultaneously available on left and right ports.

What is the function of the CNTEN and CNTRST pins on the 709269L15PF8?

The CNTENL/CNTENR and CNTRSTL/CNTRSTR pins control independent address counters per port. CNTENX = LOW enables automatic address increment on each clock rising edge; CNTRSTX = LOW resets the counter to address 0. These features enable burst-mode sequential access without external address generation logic - critical for FIFO-like behavior in real-time data pipelines.

Is the 709269L15PF8 pin-compatible with other members of the IDT709269 family?

Yes, the 709269L15PF8 shares identical 100-pin TQFP (PN100) pinout with all IDT709269 variants (e.g., 709269S12PF8, 709269L12PF8), differing only in speed grade and power class. A14X is NC across all 709269 variants, and all control, address, data, and power pin assignments remain consistent - enabling drop-in replacement within the same speed/power bin.

How does the dual chip enable scheme (CE0X/CE1X) simplify depth expansion for the 709269L15PF8?

The dual chip enable scheme allows depth expansion by asserting CE0X = LOW and CE1X = HIGH to activate one port, while deactivating the other port with CE0X = HIGH or CE1X = LOW. Two 709269L15PF8 devices can be stacked to form a 32K × 16-bit memory without external decode logic - reducing BOM count, PCB area, and timing uncertainty compared to single-enable architectures.