Renesas 72V70810PFG8

Overview

72V70810PFG8 from Integrated Device Technology is a 3.3 V, 1,024 × 1,024 non-blocking time-slot interchange (TSI) digital switch optimized for ST-BUS®/GCI and WFP frame-aligned telephony systems. It supports eight 8.192 Mb/s serial data streams, per-channel variable or constant throughput delay, and 3.3 V I/O with 5 V tolerant inputs - enabling voice/data channel routing in carrier-grade TDM switches and multi-protocol access gateways.

For engineers reviewing the 72V70810PFG8 datasheet, 72V70810PFG8 pinout, 72V70810PFG8 application, or 72V70810PFG8 equivalent, key selection criteria include frame offset calibration capability, per-channel high-impedance output control, Processor/Connection mode flexibility, and compatibility with Intel/Motorola parallel microprocessor interfaces - all critical for deterministic TDM switching in telecom infrastructure.

Technical Context

The 72V70810PFG8 implements a dual-mode serial interface supporting both ST-BUS®/GCI (auto-detected) and Wide Frame Pulse (WFP) alignment modes via the WFPS pin. Its internal architecture includes serial-to-parallel converters, 8 KHz frame-synchronized data memory, and connection memory with per-channel control bits (V/C, LPBK, OE, PC) enabling independent configuration of delay mode, loopback, output enable, and operating mode per time-slot.

It features a 16.384 MHz master clock input (CLK), 4.096 MHz HCLK for WFP mode, and dedicated frame evaluation (FE/HCLK) and frame pulse (F0i) inputs to measure and compensate for inter-stream skew up to ±4.5 CLK periods. The microprocessor port supports multiplexed/non-multiplexed Motorola and Intel buses using IM, AS/ALE, DS/RD, and R/W/WR pins - eliminating external glue logic.

Key Specifications

Pinout & Package

72V70810PFG8 is housed in a 64-pin Thin Plastic Quad Flatpack (TQFP) with 0.80 mm pitch and 14 mm × 14 mm body size (order code PF). All I/O pins are 5 V tolerant; GND and Vcc rails provide decoupling for noise-sensitive TDM signal paths.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V70805PFG8 and CY22394FXC, the 72V70810PFG8 delivers full 1,024 × 1,024 non-blocking capacity, WFP mode support for SONET-sync environments, and proven field deployment in carrier-grade TDM infrastructure - making it the sole option for scalable, protocol-flexible, high-density time-slot interchange.

Availability

72V70810PFG8 is available at Aetrix Electronics and suitable for VoIP media gateways, TDM access concentrators, multi-protocol base station controllers, and SONET/SDH add-drop multiplexers requiring stable component supply across extended product lifecycles.

Supply support for 72V70810PFG8 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 IDT72V70810 product line was designed specifically for carrier-class TDM switching applications - delivering deterministic, low-jitter time-slot interchange with protocol-agnostic frame alignment and microprocessor-configurable channel behavior.

FAQ

What is the maximum serial data rate supported by the 72V70810PFG8?

The 72V70810PFG8 supports eight independent serial data streams, each operating at 8.192 Mb/s - matching the bit rate of E1 (2.048 Mbps × 4) and T1 (1.544 Mbps × 5.3) framed interfaces. This rate is fixed and requires a 16.384 MHz master clock (CLK) input, as specified in the functional description and timing diagrams of the official datasheet revision A.

Does the 72V70810PFG8 support both ST-BUS® and GCI frame formats?

Yes, the 72V70810PFG8 automatically detects and configures itself for either ST-BUS® or GCI frame formats on the F0i input when the WFPS pin is LOW. Detection is based on edge polarity analysis of the frame pulse relative to the master clock - no software or external configuration is required, as confirmed in the Functional Description and PIN DESCRIPTION sections of the datasheet.

How does the frame offset calibration feature work in the 72V70810PFG8?

The 72V70810PFG8 uses the FE/HCLK pin and frame alignment register (FAR) to measure input frame skew against F0i. Setting the SFE bit initiates a two-frame measurement cycle; the resulting 12-bit offset value (in FAR bits 0–11) is used to program per-stream frame input offset registers (FOR0–FOR7), enabling skew compensation up to ±4.5 CLK periods - a capability verified in the Serial Input Frame Alignment Evaluation section.

Can the 72V70810PFG8 operate in both Processor Mode and Connection Mode simultaneously?

No - the 72V70810PFG8 operates in either Processor Mode or Connection Mode per channel, controlled by the PC (Processor Channel) bit in each connection memory location. When PC = 1, data written by the microprocessor is output directly; when PC = 0, the CAB/SAB bits define source channel routing from data memory - mode selection is per-channel, not global, as defined in the CONNECTION AND PROCESSOR MODES section.

What is the purpose of the CCO pin on the 72V70810PFG8?

The CCO (Control Output) pin on the 72V70810PFG8 is a 16.384 Mb/s serial output that transmits the CCO bit from each connection memory location once per frame - delivering a 2,048-bit control stream synchronized to the TX data streams. Its content reflects per-channel configuration (e.g., loopback, delay mode) and is used for external monitoring or control plane feedback, as detailed in the CONNECTION MEMORY CONTROL and PIN DESCRIPTION sections.