Renesas 70V3379S4PRF

Overview

70V3379S4PRF from Integrated Device Technology is a high-speed 32K × 18-bit synchronous dual-port static RAM with pipelined output, true dual-port architecture enabling simultaneous access to the same memory location, 7.5 ns clock cycle time (133 MHz), and selectable 3.3 V or 2.5 V I/O interface per port. It supports industrial temperature range (–40°C to +85°C) and is used in real-time packet buffering for telecom line cards.

For engineers reviewing the 70V3379S4PRF datasheet, 70V3379S4PRF pinout, 70V3379S4PRF application, or 70V3379S4PRF equivalent, key selection criteria include pipelined read latency, independent port voltage configuration via OPT pins, counter-enabled burst addressing, dual chip enable for depth expansion, and low-power standby modes controlled by CE0/CE1.

Technical Context

The 70V3379S4PRF implements fully synchronous operation on both left and right ports, with all registers clocked on the rising edge of CLKL/CLKR. Its self-timed write pulse decouples internal write timing from clock edge transitions, enabling minimal cycle time without external timing control.

Each port features independent address strobe (ADSL/ADSR), counter enable (CNTENL/CNTENR), and counter reset (CNTRSTL/CNTRSTR) logic, allowing autonomous address generation or external address loading. Byte enables (UBL/LBL and UBR/LBR) provide 9-bit granularity for multiplexed bus compatibility and data width matching.

Key Specifications

Pinout & Package

70V3379S4PRF is housed in a 128-pin Thin Quad Plastic Flatpack (TQFP) with 0.5 mm pitch, 14 mm × 20 mm footprint, and 1.4 mm profile. All VDD pins require 3.3 V ±150 mV; VDDQ pins must match OPT pin state (3.3 V if OPT = VIH, 2.5 V if OPT = VIL); all VSS pins connect to ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1375BV33-167AXC and AS7C3316PFSIG, the 70V3379S4PRF uniquely delivers per-port voltage configurability, integrated address counter, and dual chip enable-enabling simpler, more flexible system integration in mixed-signal, real-time embedded platforms.

Availability

70V3379S4PRF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, avionics data acquisition, and real-time signal processing applications requiring stable component supply, long-term lifecycle support, and industrial temperature qualification.

Supply support for 70V3379S4PRF 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 70V3379S4PRF belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered for deterministic latency, concurrent multi-port access, and robust operation in mission-critical embedded systems.

FAQ

What is the maximum operating frequency of the 70V3379S4PRF?

The 70V3379S4PRF supports a maximum clock frequency of 133 MHz, corresponding to a 7.5 ns clock cycle time (tCYC2). This timing is guaranteed across the industrial temperature range (–40°C to +85°C) and applies to both ports simultaneously in pipelined mode. The device achieves this performance through registered inputs, self-timed write logic, and optimized core design-no external PLL or timing adjustment is required to reach rated speed.

How does the 70V3379S4PRF handle mixed-voltage interfacing between its two ports?

The 70V3379S4PRF supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL to VIH (3.3 V) configures the left port for 3.3 V I/O operation with VDDQL = 3.3 V, while setting OPTR to VIL (0 V) configures the right port for 2.5 V I/O with VDDQR = 2.5 V. This allows direct connection to heterogeneous logic families-e.g., a 3.3 V FPGA controlling writes and a 2.5 V ASIC performing reads-without external level shifters or voltage translators.

What is the function of the ADSL and ADSR pins on the 70V3379S4PRF?

ADSL (Address Strobe Left) and ADSR (Address Strobe Right) are asynchronous control inputs that determine whether the current address on A0L–A14L or A0R–A14R is loaded into the internal address register on the next rising clock edge. When ADS = VIL, the external address is latched; when ADS = VIH, the internal address counter (if enabled) advances. This enables flexible addressing modes-including burst sequences driven by the counter or precise external address control-within the same device.

Can the 70V3379S4PRF be used in depth-expansion configurations without external logic?

Yes, the 70V3379S4PRF supports depth expansion without external decoding logic due to its dual chip enable architecture (CE0X and CE1X per port). By tying CE0 of one device to CE1 of the next and sharing all other control signals, multiple 70V3379S4PRF units can be stacked to increase memory depth while maintaining identical timing and control interfaces. This is explicitly validated in the datasheet's Figure 4 and reduces PCB area, BOM count, and timing complexity versus discrete decoder solutions.

What standby current does the 70V3379S4PRF draw in full power-down mode?

In full standby mode (ISB3), where both ports are disabled with CMOS-level inputs (CE0X > VDDQ – 0.2 V, CE1X < 0.2 V, and all inputs at rail), the 70V3379S4PRF draws only 6 mA typical (15 mA max) across the industrial temperature range. This ultra-low quiescent current is achieved by completely powering down internal clock distribution, sense amplifiers, and output drivers-making it suitable for battery-backed or energy-constrained embedded systems requiring extended sleep periods.