Renesas 70V3399S133PRFI

Overview

70V3399S133PRFI from Integrated Device Technology is a high-speed 256K × 18-bit synchronous dual-port SRAM with true dual-port architecture enabling simultaneous read/write access to the same memory location from independent left and right ports. It operates at 133MHz (7.5ns cycle time), supports selectable 3.3V or 2.5V I/O interfaces per port, and delivers 4.2ns clock-to-data-out in pipelined mode - ideal for real-time packet buffering in telecom line cards and FPGA co-processor memory interfaces.

For engineers reviewing the 70V3399S133PRFI datasheet, 70V3399S133PRFI pinout, 70V3399S133PRFI application, or 70V3399S133PRFI equivalent, key selection criteria include its industrial temperature rating (–40°C to +85°C), dual chip enable depth expansion capability, pipelined output timing compliance, and JTAG test support exclusion in the 128-pin TQFP package.

Technical Context

This device implements fully synchronous dual-port operation with separate address, data, and control registers on each port, enabling minimal 1.7ns setup/0.5ns hold times at 133MHz. Its internal counter with ADS-triggered address strobe and REPEAT functionality supports burst-mode sequential addressing without external logic.

The core uses 3.3V ±150mV VDD while each port's I/O voltage (VDDQ) is independently configurable to 3.3V or 2.5V via OPTL/OPTR pins - allowing mixed-voltage system interfacing. Pipelined output mode is fixed (no FT/PIPE select) in the PKG128 package due to pin count constraints.

Key Specifications

Pinout & Package

70V3399S133PRFI is packaged in a 128-pin Thin Quad Flatpack (TQFP), body size 14mm × 20mm × 1.4mm, with 0.5mm lead pitch. Pin functions are asymmetric across left/right ports and require strict adherence to VDD/VSS distribution 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 CY7C1362BV33-133AXC and AS7C3256B-133JIN, the 70V3399S133PRFI uniquely supports per-port I/O voltage selection and hardware address counters - reducing BOM count and firmware complexity in mixed-voltage, high-throughput embedded systems.

Availability

70V3399S133PRFI is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, FPGA acceleration, and DSP subsystems requiring stable component supply across extended product lifecycles.

Supply support for 70V3399S133PRFI 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, designs high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The 70V33xx family targets high-speed deterministic memory applications requiring true dual-port concurrency, low-latency pipelined access, and industrial-grade reliability - specifically engineered for network processors and real-time control systems.

FAQ

What is the maximum operating frequency of the 70V3399S133PRFI?

The 70V3399S133PRFI is rated for 133MHz operation with a 7.5ns clock cycle time. This specification applies across the full industrial temperature range (–40°C to +85°C) and is validated under worst-case voltage (3.15V VDD) and process corner conditions. The device achieves this speed using pipelined output architecture, delivering 4.2ns clock-to-data-out timing.

Does the 70V3399S133PRFI support flow-through output mode?

No, the 70V3399S133PRFI in the 128-pin TQFP package does not support flow-through output mode. Due to pin count limitations, the PIPE/FTL and PIPE/FTR pins are not implemented - the device operates exclusively in pipelined output mode with 1-cycle latency. This is explicitly documented in the datasheet note on page 4: "PIPE/FT option in PKG128 is not supported."

How is I/O voltage configured on the 70V3399S133PRFI?

I/O voltage on the 70V3399S133PRFI is configured per port using OPTL and OPTR pins. Setting OPTL to VIH (3.3V) configures the left port for 3.3V I/O operation with VDDQL = 3.3V; setting it to VIL (0V) configures 2.5V operation with VDDQL = 2.5V. The right port follows the same rule via OPTR. Both ports may operate at different voltages simultaneously.

What is the function of ADSL and ADSR pins on the 70V3399S133PRFI?

ADSL and ADSR are address strobe enable inputs that latch the current address into the internal address counter on the rising edge of CLK. When asserted, they initialize or update the starting address for burst-mode sequential access. This enables hardware-accelerated address generation without external counters - critical for DMA engines and packet buffer management in the 70V3399S133PRFI.

Is JTAG boundary scan supported on the 70V3399S133PRFI in the 128-pin TQFP package?

No, JTAG boundary scan is not supported on the 70V3399S133PRFI in the 128-pin TQFP package. The datasheet explicitly states on page 4: "Due to the limited pin count, JTAG is not supported in the PKG128 package." JTAG signals (TCK, TMS, TDI, TDO, TRST) are only available on the 208-pin and 256-pin BGA variants of the 70V3319/99 family.