Renesas 70V3319S133BC8

Overview

70V3319S133BC8 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 voltage per port via OPT pins, and delivers pipelined output mode only (no flow-through) in its 128-pin TQFP package. It is designed for real-time data buffering in telecom line cards and packet-switching fabric controllers.

For engineers reviewing the 70V3319S133BC8 datasheet, 70V3319S133BC8 pinout, 70V3319S133BC8 application, or 70V3319S133BC8 equivalent, key selection criteria include guaranteed 133MHz operation across industrial temperature (−40°C to +85°C), dual chip enables for seamless depth expansion, JTAG-compatibility exclusion in this package variant, and strict 3.3V core supply with independently configurable I/O voltage per port.

Technical Context

This device implements fully synchronous dual-port operation with registered address, data, and control inputs on both ports-enabling minimal 1.7ns setup and 0.5ns hold times at 133MHz. Its internal counter logic supports address auto-increment and repeat functionality via ADS, CNTEN, and REPEAT signals, eliminating external address generation circuitry in burst-access applications.

The 70V3319S133BC8 uses true dual-port memory cells with separate byte enables (UBL/LBL and UBR/LBR) for precise 9-bit upper/lower byte control, and features dual-cycle deselect (DCD) for pipelined outputs. Power management includes four standby current modes (ISB1–ISB4), with full CMOS-level standby drawing as low as 15mA.

Key Specifications

Pinout & Package

70V3319S133BC8 is housed in a 128-pin Thin Quad Flatpack (TQFP) with 0.5 mm pitch, 14 mm × 20 mm footprint, and 1.4 mm height. All VDD pins require 3.3 V supply; VDDQL/VDDQR must match OPTL/OPTR logic level (3.3 V if VIH, 2.5 V if 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 AS7C33199B-133JCIN, the 70V3319S133BC8 uniquely delivers industrial-grade 133MHz performance in a compact 128-pin TQFP with integrated address counter and repeat-making it optimal for space-constrained, deterministic real-time systems where external address logic must be minimized.

Availability

70V3319S133BC8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and radar signal processing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 70V3319S133BC8 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 and computing markets.

The 70V3319S133BC8 belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered specifically for deterministic, low-latency inter-processor and protocol bridging applications in telecom, test equipment, and real-time control systems.

FAQ

What is the maximum guaranteed operating frequency of the 70V3319S133BC8?

The 70V3319S133BC8 is rated for guaranteed operation at 133 MHz across the full industrial temperature range (−40°C to +85°C), with a 7.5 ns clock cycle time (tCYC2) and 4.2 ns clock-to-data-out (tCD2) in pipelined mode. This specification is production-tested and documented in the official IDT datasheet revision DSC-5623/13.

Does the 70V3319S133BC8 support flow-through output mode?

No, the 70V3319S133BC8 does not support flow-through output mode. As explicitly stated in the datasheet (Note 8 on page 4 and Note 5 on page 5), the 128-pin TQFP package (PKG128) lacks sufficient pins to implement the PIPE/FT selection logic-so the device operates exclusively in pipelined output mode on both ports.

Can the left and right ports of the 70V3319S133BC8 operate at different I/O voltages?

Yes, the 70V3319S133BC8 supports independent I/O voltage selection per port: OPTL configures VDDQL (left port), and OPTR configures VDDQR (right port). Each can be set to either 3.3 V (VIH) or 2.5 V (VIL), enabling mixed-voltage system interfacing-for example, connecting the left port to a 3.3 V FPGA and the right port to a 2.5 V ASIC.

What is the purpose of the ADS and REPEAT signals in the 70V3319S133BC8?

The ADS (Address Strobe) signal latches the current address into the internal counter, enabling auto-increment behavior. The REPEAT signal resets the counter to the last valid ADS-loaded address-allowing efficient implementation of circular buffers or FIFOs without external address management logic. Both functions are integral to the 70V3319S133BC8's burst-access capability.

Is JTAG debugging supported on the 70V3319S133BC8?

No, JTAG is not supported on the 70V3319S133BC8. As confirmed in the datasheet (Note 9 on page 4), the 128-pin TQFP package lacks sufficient pins to accommodate the TCK, TMS, TDI, TDO, and TRST signals required for IEEE 1149.1 compliance-so JTAG functionality is excluded in this variant.