Renesas 70V3319S133PRF

Overview

70V3319S133PRF 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. It is used in real-time packet buffering for telecom line cards requiring deterministic latency and concurrent access.

For engineers reviewing the 70V3319S133PRF datasheet, 70V3319S133PRF pinout, 70V3319S133PRF application, or 70V3319S133PRF equivalent, key selection criteria include pipelined output timing (tCD2 = 4.2ns max), dual chip enable depth expansion capability, industrial temperature support (–40°C to +85°C), and independent VDDQ voltage selection per port via OPTL/OPTR pins.

Technical Context

The 70V3319S133PRF implements full synchronous operation on both ports with registered address, data, and control inputs-enabling 1.7ns setup and 0.5ns hold times at 133MHz. Its dual-cycle deselect (DCD) feature ensures clean bus release in pipelined mode, while self-timed write logic maintains fast 7.5ns cycle time without external wait-state generation.

It integrates independent address counters per port with CNTEN/REPEAT/ADSR controls, supporting burst-mode sequential addressing without host CPU intervention. JTAG boundary-scan (IEEE 1149.1) is omitted in this 128-pin TQFP variant due to pin count constraints, distinguishing it from 208- and 256-pin BGA variants.

Key Specifications

Pinout & Package

70V3319S133PRF is housed in a 128-pin Thin Quad Flatpack (TQFP) package measuring 14 mm × 20 mm × 1.4 mm, with 0.5 mm lead pitch. The package lacks JTAG and PL/FT mode selection due to pin count limitations-device operates exclusively in pipelined output mode on both ports.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133BZI and IDT70V27L15PF8, the 70V3319S133PRF uniquely delivers 256K depth, per-port 2.5V/3.3V I/O selection, and guaranteed pipelined timing in a prototyping-friendly 128-pin TQFP-making it optimal for industrial and telecom designs requiring scalability, voltage interoperability, and deterministic latency.

Availability

70V3319S133PRF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and avionics applications requiring stable component supply, long-term lifecycle assurance, and industrial temperature compliance.

Supply support for 70V3319S133PRF 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 deterministic, low-latency memory subsystems in real-time networking and signal processing equipment-emphasizing simultaneous access, voltage-flexible I/O, and industrial reliability.

FAQ

What is the maximum supported clock frequency for the 70V3319S133PRF?

The 70V3319S133PRF is rated for operation up to 133 MHz, corresponding to a 7.5 ns clock cycle time in pipelined mode. This specification is guaranteed across the full industrial temperature range (–40°C to +85°C) and applies to both left and right ports independently. The device does not support the 166 MHz speed grade-only the 133 MHz variant is offered in the 128-pin TQFP package.

Does the 70V3319S133PRF support flow-through output mode?

No, the 70V3319S133PRF does not support flow-through output mode. Due to pin count limitations in the 128-pin TQFP package, the FT/PIPEL and FT/FTR pins are not implemented, and the device operates exclusively in pipelined output mode on both ports. This is explicitly stated in the datasheet notes for PKG128.

Can the left and right ports of the 70V3319S133PRF operate at different I/O voltages?

Yes, the 70V3319S133PRF supports independent I/O voltage selection per port. OPTL configures the left port's VDDQL rail (3.3V or 2.5V), and OPTR configures the right port's VDDQR rail. Both ports may run at 3.3V, both at 2.5V, or one at each voltage-enabling direct interfacing with mixed-voltage SoCs and FPGAs without external level shifters.

What is the function of the ADSL and ADSR pins on the 70V3319S133PRF?

The ADSL and ADSR pins are address strobe enable inputs that load the current address bus value into the respective port's internal address counter. When asserted, they initiate auto-incrementing sequential addressing-enabling burst-mode access without repeated CPU address updates. This is essential for implementing hardware-managed FIFOs and circular buffers in real-time systems.

Is JTAG boundary-scan supported on the 70V3319S133PRF?

No, JTAG boundary-scan (IEEE 1149.1) is not supported on the 70V3319S133PRF. The 128-pin TQFP package lacks the required TDI, TDO, TCK, TMS, and TRST pins due to insufficient pin count. JTAG functionality is only available on the 208-pin and 256-pin BGA variants of the 70V3319/99 family.