Renesas 71V67603S166PFG

Overview

71V67603S166PFG from IDT (Integrated Device Technology) is a 256K × 36-bit, 3.3V synchronous SRAM with pipelined outputs, single-cycle deselect, and 166MHz clock operation (3.5ns access time). It supports interleaved/linear burst modes via LBO input, features self-timed write with global/byte write controls, and operates across commercial temperature range (0°C to +70°C). It serves as high-speed cache or buffer memory in network packet processors and telecom line cards.

For engineers reviewing the 71V67603S166PFG datasheet, 71V67603S166PFG pinout, 71V67603S166PFG application, or 71V67603S166PFG equivalent, key selection criteria include burst-mode timing compliance, ZZ-controlled sleep current (50mA), TQFP-100 package compatibility, and 3.3V I/O voltage tolerance - all critical for low-latency embedded memory subsystems.

Technical Context

The 71V67603S166PFG implements a synchronous, clock-driven architecture with registered address, data, and control inputs. Its internal burst counter generates four consecutive addresses per ADV assertion, with output pipelining delivering first valid data one clock cycle after CLK rising edge.

Burst order is determined by static LBO pin state (LOW = linear, HIGH = interleaved), and write operations are controlled synchronously via GW, BWE, and BW1–BW4 signals. Power management includes asynchronous ZZ input enabling full-sleep mode with 50mA supply current at VDD = 3.465V.

Key Specifications

Pinout & Package

Packaged in JEDEC-standard 100-pin thin quad flatpack (TQFP), 14mm × 20mm body, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous SRAM applications.

Compared with CY7C1362BV33-166BAXI and AS7C3256B-166JCIN, the 71V67603S166PFG uniquely supports both processor- and cache-controller address status handshaking (ADSP/ADSC) and offers TQFP-100 packaging - simplifying thermal validation and field repair in telecom infrastructure.

Availability

71V67603S166PFG is available at Aetrix Electronics and suitable for network packet buffering, telecom line card caching, and industrial PLC data logging requiring stable component supply and long-term obsolescence management.

Supply support for 71V67603S166PFG 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

IDT (Integrated Device Technology) is a fabless semiconductor company specializing in high-performance timing, memory, and RF solutions, acquired by Renesas Electronics in 2019.

The 71V67603S166PFG belongs to IDT's high-speed synchronous SRAM product line, designed specifically for low-latency, burst-oriented memory subsystems in networking, telecommunications, and test equipment.

FAQ

What is the maximum clock frequency supported by the 71V67603S166PFG?

The 71V67603S166PFG supports a maximum clock frequency of 166MHz, corresponding to a 6ns clock cycle time and 3.5ns clock-to-data (tCD) access time. This rating is guaranteed over the commercial temperature range (0°C to +70°C) with VDD and VDDQ at 3.3V ±5%. Operation beyond 166MHz is not characterized or supported.

Does the 71V67603S166PFG support both linear and interleaved burst modes?

Yes, the 71V67603S166PFG supports both burst modes via the LBO (Linear Burst Order) pin: LBO = LOW selects linear addressing (00→01→10→11), while LBO = HIGH selects interleaved (00→01→11→10). The LBO pin is static and must remain stable during device operation to prevent burst sequence corruption.

How does the ZZ pin affect power consumption in the 71V67603S166PFG?

When ZZ is driven HIGH, the 71V67603S166PFG enters full sleep mode, gating the internal clock and reducing supply current to 50mA (IZZ) at VDD = 3.465V. This state retains data and requires no power-supply sequencing. Recovery time (tZZR) is 100ns minimum after ZZ returns LOW.

What is the function of the ADV, ADSP, and ADSC pins on the 71V67603S166PFG?

ADV advances the internal burst counter for sequential address generation. ADSP (Address Status from Processor) and ADSC (Address Status from Cache Controller) are synchronous inputs that load the address register on their falling edges - enabling precise handshake timing with external controllers. ADSP is gated by CE; ADSC is independent.

Can the 71V67603S166PFG operate in 512K × 18-bit configuration?

Yes, the 71V67603S166PFG supports 512K × 18-bit organization through address remapping: A18 becomes MSB, and data width reduces to 18 bits (I/O0–I/O17 plus I/OP1–I/OP2). Pin configurations differ between 256K×36 and 512K×18 modes - refer to PKG100 pinout diagrams in the datasheet for signal assignments.