Renesas 70V3319S133BCGI

Overview

70V3319S133BCGI 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 data flow control.

For engineers reviewing the 70V3319S133BCGI datasheet, 70V3319S133BCGI pinout, 70V3319S133BCGI application, or 70V3319S133BCGI equivalent, key selection criteria include its 133MHz industrial-grade timing, dual-voltage I/O flexibility (2.5V/3.3V per port), pipelined output mode only (no flow-through on TQFP), JTAG omission in this package, and 128-pin TQFP footprint compatibility with depth-expansion logic.

Technical Context

This device 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 chip enables (CE0/CE1 per port) support seamless depth expansion without external logic, while separate upper/lower byte enables (UB/LB) allow precise 9-bit sub-word writes aligned to multiplexed bus protocols.

The internal address counter-enabled by CNTEN and resettable via ADS and REPEAT signals-provides burst-addressing capability without host CPU intervention. All I/Os are LVTTL-compatible, with VDDQ voltage selected independently per port via OPTL/OPTR pins, and core powered by a fixed 3.3V VDD supply.

Key Specifications

Pinout & Package

70V3319S133BCGI is housed in a 128-pin Thin Quad Flatpack (TQFP) with 0.5mm pitch, body size 14mm × 20mm × 1.4mm. All VDD pins require connection to 3.3V; VDDQ pins must match OPT pin logic level (3.3V if OPT = VIH, 2.5V if OPT = VIL). JTAG and flow-through mode are omitted in this package variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133AXC and AS7C3256A-133JCIN, the 70V3319S133BCGI uniquely supports independent 2.5V/3.3V I/O per port and integrated address counter-enabling mixed-voltage system integration and reduced host CPU load in burst-oriented applications.

Availability

70V3319S133BCGI is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, medical imaging, and real-time signal processing applications requiring stable component supply, long-term lifecycle support, and industrial temperature compliance.

Supply support for 70V3319S133BCGI 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, specializes in high-performance timing, memory interface, and RF solutions for communications, computing, and industrial markets.

The 70V3319S133BCGI belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic, low-latency data exchange in real-time embedded systems with concurrent processing demands.

FAQ

What is the maximum operating frequency of the 70V3319S133BCGI?

The 70V3319S133BCGI is rated for 133MHz operation (7.5ns clock cycle time) across the full industrial temperature range (–40°C to +85°C). This frequency is guaranteed with pipelined output mode, which is the only supported mode in its 128-pin TQFP package. The device achieves 4.2ns clock-to-data-out timing under these conditions, enabling deterministic latency-critical designs.

Does the 70V3319S133BCGI support flow-through output mode?

No, the 70V3319S133BCGI does not support flow-through output mode. As explicitly stated in the datasheet (Note 8, Page 4), the PIPE/FT option is not supported in the PKG128 (128-pin TQFP) package due to pin count limitations. The device operates exclusively in pipelined output mode, delivering data with one-clock-cycle latency after the initiating clock edge.

Can the left and right ports of the 70V3319S133BCGI operate at different I/O voltages?

Yes, the 70V3319S133BCGI supports independent I/O voltage selection per port. OPTL sets the left port's I/O voltage (2.5V or 3.3V), while OPTR sets the right port's. Corresponding VDDQL and VDDQR supplies must match the selected level. This enables direct interfacing with mixed-voltage ASICs-for example, a 2.5V FPGA core and 3.3V peripheral bus-without external level shifters.

Is JTAG debugging supported on the 70V3319S133BCGI?

No, JTAG is not supported on the 70V3319S133BCGI. As confirmed in the datasheet (Note 9, Page 4), JTAG functionality (TCK, TMS, TDI, TDO, TRST) is omitted from the 128-pin TQFP package due to insufficient pin count. JTAG is only available on the 208-pin and 256-pin BGA variants of the 70V3319/99 family.

What is the function of the ADS and REPEAT pins on the 70V3319S133BCGI?

The ADS (Address Strobe) and REPEAT pins enable autonomous address generation. When CNTEN is asserted, ADS loads a new base address into the internal counter; subsequent accesses auto-increment. REPEAT resets the counter to the last ADS-loaded address-ideal for burst transfers to a fixed memory region. These signals reduce host CPU overhead in streaming applications like packet buffering or sensor data acquisition.