Renesas IDT72V73260BB

Overview

IDT72V73260 from Integrated Device Technology is a 3.3 V, 16,384 × 16,384 non-blocking time slot interchange (TSI) digital switch optimized for TDM voice and data applications. It supports 32 serial input/output streams at 32.768 Mb/s, offers per-channel variable or constant delay modes, and integrates JTAG test access and automatic ST-BUS®/GCI interface detection.

For engineers reviewing the IDT72V73260 datasheet, IDT72V73260 pinout, IDT72V73260 application, or IDT72V73260 equivalent, key selection considerations include frame-aligned delay control, microprocessor-accessible connection memory, ST-BUS®/GCI auto-sensing, and dual-package availability (PBGA BB and TQFP DA) for telecom infrastructure design.

Technical Context

The IDT72V73260 implements a fully non-blocking TSI architecture with separate Data Memory (for serial-to-parallel conversion of RX streams) and Connection Memory (for path mapping), enabling dynamic per-channel routing decisions. Its dual operating modes-Processor Mode (microprocessor-driven output) and Connection Mode (memory-mapped switching)-support flexible system integration in multi-device TDM backplanes.

Timing integrity is maintained via F32i frame pulse synchronization, C32i 32.768 MHz master clock, and programmable per-stream input frame offset (±7.5 clock cycles resolution). Delay behavior is strictly determined by MOD1–0 bits in Connection Memory: Variable Delay mode achieves minimum 3-time-slot latency, while Constant Delay mode guarantees fixed 513-time-slot throughput for frame-coherent data transport.

Key Specifications

Pinout & Package

Available in two industrial-grade packages: 144-pin PBGA (13 mm × 13 mm, 1 mm pitch, order code BB) and 144-pin TQFP (20 mm × 20 mm, 0.5 mm pitch, order code DA). Both packages support identical pin functions and thermal performance across −40°C to +85°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V73250 and CY22394, the IDT72V73260 uniquely delivers full 32-stream I/O, per-channel delay mode control, hardware-accelerated frame skew measurement, and IEEE-1149.1 testability - making it the sole option for scalable, standards-compliant telecom infrastructure requiring deterministic TDM switching.

Availability

IDT72V73260 is available at Aetrix Electronics and suitable for voice over E1/T1 gateways, digital loop carriers, multi-service access platforms, VoIP media gateway controllers, and telecom infrastructure requiring stable component supply across extended product lifecycles.

Supply support for IDT72V73260 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 high-performance interconnect solutions for communications and computing markets.

The IDT72V73260 belongs to IDT's TSI Switch family, designed specifically for carrier-class TDM infrastructure requiring deterministic, low-latency, frame-aligned time slot interchange in voice and broadband data applications.

FAQ

What is the primary function of the IDT72V73260 in a TDM system?

The IDT72V73260 serves as a non-blocking time slot interchange digital switch that routes individual PCM time slots between 32 serial input and 32 serial output streams. Its core function is to perform dynamic, per-channel cross-connection of 64 kbit/s channels within a 32.768 Mb/s data stream while preserving frame alignment and supporting both voice-optimized (Variable Delay) and data-optimized (Constant Delay) throughput behaviors. This makes the IDT72V73260 essential for E1/T1 multiplexing, digital loop carriers, and VoIP gateway architectures.

How does the IDT72V73260 handle timing skew between input streams?

The IDT72V73260 uses its Frame Evaluation (FE) input and Frame Offset Registers (FOR0–FOR7) to measure and compensate for inter-stream timing skew. By comparing the FE signal against the F32i frame pulse, the device calculates per-RX-stream offset values stored in the Frame Alignment Register with ½-C32i-cycle (15.26 ns) resolution. These values are then applied to adjust input frame alignment up to +7.5 clock cycles, ensuring synchronized switching across physically disparate backplane paths. This capability is intrinsic to the IDT72V73260 and requires no external calibration logic.

Can the IDT72V73260 operate with both ST-BUS® and GCI interfaces simultaneously?

No - the IDT72V73260 automatically detects whether the incoming F32i frame pulse conforms to ST-BUS® (falling-edge aligned) or GCI (rising-edge aligned) specifications and configures its internal serial interface timing accordingly. It operates in one mode at a time, determined by the physical frame signal applied to F32i. The detection is hardware-based and occurs at power-up or reset; no software configuration is required. The IDT72V73260 does not support simultaneous dual-interface operation or manual override of the detected mode.

What is the role of the ODE pin on the IDT72V73260?

The ODE (Output Drive Enable) pin is a global active-low control that overrides all per-channel output enable settings in Connection Memory. When ODE is LOW and the Output Stand By bit in the Control Register is also LOW, all 32 TX outputs enter high-impedance state regardless of MOD1–0 configuration or OEI register settings. This provides fail-safe isolation during system initialization, hot-swap events, or fault conditions. The IDT72V73260 requires ODE to be held LOW during power-up until microprocessor initialization completes to prevent spurious output states.

Does the IDT72V73260 support JTAG boundary scan testing?

Yes - the IDT72V73260 integrates a full IEEE-1149.1 (JTAG) Test Access Port with TCK, TDI, TDO, TMS, and TRST pins. This enables boundary scan testing of PCB interconnects, verification of solder joint integrity, and in-system debugging of register and memory contents. The JTAG interface operates independently of the main TSI functionality and remains accessible even when the device is held in reset or configured in high-impedance output mode. All JTAG operations comply with IEEE-1149.1-1990 and -2001 standards as implemented in the IDT72V73260.