Renesas IDT71P71604S250BQG

Overview

IDT71P71604S250BQG from Integrated Device Technology is a 18 Mb (512K × 36-bit) pipelined DDR-II SRAM with double-data-rate burst-of-2 operation, 1.8 V core voltage (VDD), 1.5 V I/O supply (VDDQ), and HSTL-compatible 165-ball fBGA package. It delivers 333 MHz clock rate support, dual echo clocks (CQ/CQ), and programmable output impedance for high-speed memory subsystems in networking switches and packet buffers.

For engineers reviewing the IDT71P71604S250BQG datasheet, IDT71P71604S250BQG pinout, IDT71P71604S250BQG application, or IDT71P71604S250BQG equivalent, key selection criteria include burst-of-2 DDR timing compliance, scalable 35–70 Ω output drive, JTAG boundary-scan capability, and 165-ball 13 mm × 15 mm fBGA mechanical compatibility with high-density PCB layouts.

Technical Context

The IDT71P71604S250BQG implements a synchronous DDR architecture with separate K/K (control/address/data capture) and C/C (data output/echo clock generation) clock domains. Its DLL aligns output data to C/C edges with sub-0.5 ns timing tolerance, enabling precise source-synchronous read capture at 333 MHz.

It supports byte write (BW0–BW3) and SA0-controlled burst ordering for x36 configuration, features automatic DQ tri-state control during idle reads, and uses ZQ-pin-based impedance calibration referenced to an external 250 Ω resistor for ±10% output drive matching across voltage/temperature.

Key Specifications

Pinout & Package

Package: 165-ball fine-pitch Ball Grid Array (fBGA), 1.0 mm pitch, 13 mm × 15 mm body size, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DDR-II SRAM applications.

Compared with CY7C2663KV18, IDT71P71604S250BQG offers tighter AC timing at 333 MHz but lacks extended temperature support; versus MT46V32M36P-5B, it delivers zero-refresh, deterministic sub-10 ns read latency essential for real-time packet processing.

Availability

IDT71P71604S250BQG is available at Aetrix Electronics and suitable for networking switch buffers, high-speed test equipment memory, optical transport line cards, and radar signal processing buffers requiring stable component supply and long-term production continuity.

Supply support for IDT71P71604S250BQG 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 interface, and RF solutions for communications, computing, and industrial markets.

IDT71P71604S250BQG belongs to the QDR™II/DDR-II SRAM family developed jointly with Cypress and Micron to address bandwidth-constrained memory interfaces in packet-switched infrastructure and real-time signal acquisition systems.

FAQ

What is the maximum supported clock frequency for IDT71P71604S250BQG?

IDT71P71604S250BQG supports up to 333 MHz for K/K and C/C clocks, corresponding to a 666 MT/s effective data rate on its 36-bit DDR bus. This rating is validated under commercial temperature conditions (0°C to +70°C) with VDD = 1.8 V ± 100 mV and VDDQ = 1.5 V. The device maintains full timing compliance including tKHAX, tAVKH, and tCHQV parameters at this speed.

Does IDT71P71604S250BQG require external termination resistors?

IDT71P71604S250BQG does not require external series termination resistors due to its programmable output impedance. By connecting a 250 Ω resistor between ZQ and VSS, the device calibrates its DQ and CQ drivers to ~50 Ω output impedance, matching standard PCB trace impedances. This eliminates discrete termination components and reduces layout complexity.

How is burst ordering controlled in IDT71P71604S250BQG for x36 configuration?

In IDT71P71604S250BQG's 512K × 36-bit mode, burst ordering is controlled by the SA0 pin. When SA0 = 0, the burst proceeds linearly (word 0 → word 1); when SA0 = 1, the order reverses (word 1 → word 0). This allows flexible alignment of packet headers or control fields without software reordering, and is sampled synchronously with the K clock edge.

Can IDT71P71604S250BQG operate with only the K/K clock pair?

Yes, IDT71P71604S250BQG supports single-clock mode: tying C and C high disables their function, causing DQ outputs and CQ echo clocks to be driven solely by K/K timing. In this mode, data valid timing shifts to tKHQV/tKHQX specifications, and DLL alignment is bypassed - useful for simplified timing closure in non-critical paths or legacy controller interfaces.

What JTAG functionality does IDT71P71604S250BQG provide?

IDT71P71604S250BQG implements full IEEE 1149.1 JTAG boundary-scan with TCK, TMS, TDI, and TDO pins. It supports device identification (IDCODE), interconnect testing, and visibility into internal control signals - enabling in-system validation of solder joints and signal integrity on dense high-speed PCBs without physical probe access.