Renesas 72V71660DR

Overview

IDT72V71660 from Integrated Device Technology is a 3.3 V non-blocking time slot interchange (TSI) digital switch with 16,384 × 16,384 channel capacity at 16.384 Mb/s, 64 serial input/output streams, per-channel variable or constant delay mode selection, automatic ST-BUS®/GCI interface detection, and IEEE-1149.1 JTAG test port - deployed in TDM-based voice switching systems requiring frame-aligned PCM routing.

For engineers reviewing the IDT72V71660 datasheet, IDT72V71660 pinout, IDT72V71660 application, or IDT72V71660 equivalent, key selection considerations include per-stream frame offset programming, microprocessor-accessible connection memory, dual operating modes (Processor vs. Connection), output enable indication capability, and support for industrial temperature range (−40°C to +85°C).

Technical Context

The IDT72V71660 implements a dual-memory architecture: Data Memory stores incoming RX stream data synchronized to an 8 kHz frame pulse (125 μs), while Connection Memory maps output channels to input source addresses or processor-loaded values. Its switching logic supports both Variable Delay Mode (minimum 3 time-slots, optimized for low-latency voice) and Constant Delay Mode (fixed 1-frame + 1-channel latency, preserving frame integrity for wideband data).

Frame alignment is managed via the FE/HCLK pin and WFPS-selectable interface: in ST-BUS® mode, frame evaluation uses falling-edge synchronization; in GCI mode, rising-edge alignment applies. Input skew compensation is enabled through programmable frame offset registers (FOR), supporting ±7.5 clock-cycle adjustments in 0.5-cycle steps per RX stream.

Key Specifications

Pinout & Package

Available in two package options: 208-pin Plastic Ball Grid Array (PBGA, 1 mm pitch, 17 mm × 17 mm, order code BB208-1) and 208-pin Plastic Quad Flatpack (PQFP, 0.5 mm pitch, 28 mm × 28 mm, order code DR208-1). Both packages support identical pin functions and electrical specifications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar time slot interchange applications.

Compared with IDT72V71660, IDT72V71260 offers reduced capacity and data rate support but maintains pin and software compatibility, whereas PM73120 introduces HDLC acceleration at the cost of increased design complexity and loss of JTAG debug visibility.

Availability

IDT72V71660 is available at Aetrix Electronics and suitable for telecom infrastructure, TDM voice switching, and digital trunk interface applications requiring stable component supply, long-term lifecycle assurance, and industrial-grade thermal performance.

Supply support for IDT72V71660 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, specialized in high-performance timing, memory interface, and communications ICs for telecom, computing, and industrial markets.

The IDT72V71660 belongs to IDT's TSI digital switch product line, engineered specifically for non-blocking, low-latency time-slot routing in TDM-based voice and data infrastructure equipment operating across extended temperature ranges.

FAQ

What is the maximum data rate supported by the IDT72V71660?

The IDT72V71660 supports serial data rates of 2.048 Mb/s, 4.096 Mb/s, 8.192 Mb/s, and 16.384 Mb/s on all 64 RX and TX streams. At 16.384 Mb/s, it achieves full 16,384 × 16,384 non-blocking channel capacity with 256 time slots per 125 μs frame. The master clock (CLK) must be set to 16.384 MHz for this rate, and the DR1–DR0 bits in the Control Register must be configured accordingly.

How does the IDT72V71660 handle input stream skew in distributed systems?

The IDT72V71660 compensates for inter-stream skew using its Frame Evaluation feature and Frame Offset Registers (FOR). By asserting the Start Frame Evaluation bit, the device measures delay between the FP input and each RX stream's data edge, storing results in the Frame Alignment Register. These values are then used to program per-RX frame offsets up to +7.5 CLK cycles in 0.5-cycle increments - correcting skew caused by unequal PCB trace lengths or backplane delays.

Can the IDT72V71660 operate in both ST-BUS® and GCI modes simultaneously?

No - the IDT72V71660 automatically detects and locks onto either ST-BUS® or GCI framing based on the FP signal's edge behavior, but operates exclusively in one mode at a time. Mode selection is controlled by the WFPS pin: when LOW, ST-BUS®/GCI auto-detection is active; when HIGH, the device enters Wide Frame Pulse Select (WFPS) mode requiring external 4.096 MHz HCLK and negative frame pulses. It cannot process both formats concurrently.

What is the purpose of the ODE pin on the IDT72V71660?

The ODE (Output Drive Enable) pin provides hardware-level control over all TX output drivers. When ODE is LOW and the Output Standby bit in the Control Register is also LOW, all 64 TX outputs enter high-impedance - a critical safety feature during power-up or reconfiguration. If ODE is HIGH, output drivers are enabled regardless of the Output Standby bit, allowing per-channel control via Connection Memory MOD bits to take precedence.

Does the IDT72V71660 support JTAG boundary-scan testing?

Yes - the IDT72V71660 fully complies with IEEE-1149.1 and includes a dedicated JTAG Test Access Port (TAP) with TCK, TMS, TDI, TDO, and TRST pins. This enables boundary-scan testing of PCB interconnects, in-system register access, and debug visibility into internal memories and control states without requiring external probes or functional test vectors.