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Home > Products > Integrated Circuits (ICs) > Logic > Signal Switches, Multiplexers, Decoders

Renesas IDT72V70800TF

Name: IDT72V70800TF
Brand: Renesas
SKU: IDT72V70800TF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IDT72V70800TF

Manufacturer:: Renesas

Category:: Signal Switches, Multiplexers, Decoders

Package:: 64-LQFP

Datasheet:: IDT72V70800TF.pdf

Description:: IC MULTIPLEXER 1 X 4:4 64TQFP

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Product details

Overview

IDT72V70800TF from Integrated Device Technology is a 3.3 V, 512 × 512 non-blocking time slot interchange (TSI) digital switch optimized for ST-BUS®/GCI and wide frame pulse (WFP) telecommunication interfaces. It supports four 8.192 Mb/s serial data streams, delivers per-channel variable or constant throughput delay, and features 3.3 V I/O with 5 V tolerant inputs, operating from –40°C to +85°C in a 64-pin STQFP package.

For engineers reviewing the IDT72V70800TF datasheet, IDT72V70800TF pinout, IDT72V70800TF application, or IDT72V70800TF equivalent, key selection considerations include frame alignment calibration (FE/HCLK), per-stream input offset programming (FOR registers), microprocessor interface mode selection (IM pin), and high-impedance control of TX0–TX3 outputs via ODE and OSB bits.

Technical Context

The IDT72V70800TF implements a dual-mode serial interface: ST-BUS®/GCI (auto-detected via F0i polarity) and WFP (enabled by WFPS = HIGH), with CLK = 16.384 MHz and FE/HCLK = 4.096 MHz in WFP mode. Frame alignment evaluation uses FE input synchronized to F0i falling/rising edges depending on detected format.

Switching operates in Connection Mode (source address mapping in connection memory) or Processor Mode (direct per-channel data write), with five per-channel control bits enabling loopback (LPBK), output enable (OE), delay mode (V/C), processor mode (PC), and CCO control. Input frame offset compensation supports up to +4.5 CLK periods skew resolution in ½-clock steps.

Key Specifications

Parameter	Value and Actual Design Meaning
Switch Capacity	512 × 512 channels at 8.192 Mb/s - supports full non-blocking TSI for PCM voice and N×64 kbit/s data across four serial streams.
Data Rate per Stream	8.192 Mb/s - matches standard E1/T1 framing; requires 16.384 MHz master clock (CLK) for serial I/O timing.
Throughput Delay Modes	Per-channel selectable: Variable delay (min. 3 time-slots) for low-latency voice; Constant delay (min. 1 frame) for frame-integrity-critical data.
Input Frame Offset Range	+0 to +4.5 CLK periods (½-cycle resolution) - compensates path skew across distributed backplanes without external logic.
Microprocessor Interface	Intel/Motorola-compatible parallel port with IM-selectable multiplexed/non-multiplexed operation - eliminates glue logic for CPU integration.
Supply & I/O	3.3 V core supply; 3.3 V I/O with 5 V tolerant inputs - enables direct interfacing with legacy 5 V logic and mixed-voltage systems.
Operating Temperature	–40°C to +85°C - qualified for industrial and telecom infrastructure environments including remote DSLAMs and base station line cards.

Pinout & Package

Package: 64-pin Small Thin Quad Flatpack (STQFP), 0.50 mm pitch, 10 mm × 10 mm body (order code TF). Pin 1 marked by dot; IC pins tied to GND for normal operation; DNC pins unconnected.

Pin/Terminal	Circuit Role	Design Meaning
VCC	Power Supply	+3.3 V core supply rail; decoupling required near each VCC pin per layout guidelines.
GND	Ground Reference	System ground return; multiple GND pins ensure low-impedance reference for analog and digital sections.
TX0–TX3	Serial Output Streams	Three-state outputs at 8.192 Mb/s; enabled by ODE HIGH and OSB bit (if ODE = LOW); per-channel OE bit overrides global control.
RX0–RX3	Serial Input Streams	8.192 Mb/s differential-capable inputs; auto-detect ST-BUS®/GCI framing via F0i edge polarity.
F0i	Frame Synchronization Input	Accepts 8 kHz frame pulse; determines ST-BUS® (falling-edge sync) or GCI (rising-edge sync) mode when WFPS = LOW.
FE/HCLK	Frame Evaluation / HCLK Input	In ST-BUS®/GCI mode: measures input frame offset vs. F0i; in WFP mode: provides 4.096 MHz HCLK for frame alignment.
CLK	Master Clock Input	16.384 MHz input; drives all serial shift registers and internal timing; must be stable ±50 ppm for jitter-sensitive applications.
WFPS	Wide Frame Pulse Select	Active HIGH enables WFP mode; disables FE-based frame evaluation but retains programmable FOR register compensation.
RESET	Asynchronous Reset	Active LOW; clears internal counters, registers, and forces TX0–TX3 into high-impedance; min. 100 ns pulse width required.
ODE	Output Drive Enable	Global enable for TX0–TX3 drivers; overrides per-channel OE when LOW (with OSB = 0); allows fast power-down of all outputs.
IM	CPU Interface Mode	HIGH selects multiplexed bus (AD0–AD7 shared); LOW selects non-multiplexed (A0–A7 + AD0–AD7 + D8–D15); configures R/W/WR and DS/RD behavior.
CS, DS/RD, R/W/WR, AS/ALE	Microprocessor Control	Support Intel 8080-style (RD/WR) and Motorola 68K-style (DS/RD, R/W) timing; AS/ALE latches address in multiplexed mode.
AD0–AD7, D8–D15, A0–A7	Address/Data Bus	16-bit data path (AD0–AD7 + D8–D15); 8-bit address (A0–A7) in non-multiplexed mode; AD0–AD7 multiplexed with address in mode 1/2.
DTA	Data Transfer Acknowledge	Active LOW indicates microprocessor bus cycle completion; transitions HIGH → high-Z after cycle, enabling faster bus timing with weak pull-up.

Key Features

Feature	Design Value
Auto-detect ST-BUS®/GCI framing	Eliminates manual configuration and external framing logic by sensing F0i edge polarity and selecting correct bit boundary and sampling phase.
Per-stream frame delay offset programming	Compensates inter-stream skew in multi-chip switches using dedicated FOR registers - critical for concatenated data channel alignment.
Two throughput delay modes per channel	Variable delay minimizes voice latency (3-slot minimum); constant delay preserves frame integrity for wideband data - both selectable per channel.
Internal loopback per channel	Enables diagnostic testing without external cabling: TXn channel m → RXn channel m internally when LPBK = 1 in connection memory.
Memory block programming	Loads identical high-order bits (11–15) across all 512 connection memory locations in two frames - accelerates initialization of broadcast paths.

Applications

Voice over E1/T1 Line Cards	Distributed Telecom Switch Fabric
Use Scenario: Aggregating 30–32 voice channels from multiple E1 trunks onto a centralized switching matrix in carrier-grade access equipment. IC Role / Device Role / Timing Role: Time slot interchange switch performing dynamic channel routing, frame synchronization, and per-channel delay management between RX and TX streams. Use Value: Enables real-time voice path reconfiguration with sub-frame latency (≤3 time-slots) and maintains E1 frame alignment across distributed shelves via programmable input offset registers.	Use Scenario: Interfacing multiple DSP farms and line interface units (LIUs) in modular central office switches requiring scalable, non-blocking TSI. IC Role / Device Role / Timing Role: Digital switch fabric element handling 512×512 channel cross-connects with automatic ST-BUS®/GCI detection and multi-stream frame offset calibration. Use Value: Reduces system-level timing complexity by auto-calibrating inter-chip frame skew and supporting broadcast/multicast via connection memory addressing.
DSLAM Channel Aggregation	VoIP Gateway Media Processing
Use Scenario: Consolidating ADSL2+ downstream data channels (N×64 kbit/s) across multiple line cards into a unified ATM or IP backplane interface. IC Role / Device Role / Timing Role: Constant-delay TSI switch ensuring frame-aligned transport of concatenated data payloads across serial backplanes with deterministic latency. Use Value: Preserves G.992.3/G.992.5 frame structure end-to-end by enforcing 1-frame minimum constant delay and supporting WFP mode for wide-pulse synchronization.	Use Scenario: Bridging TDM voice traffic from PSTN interfaces to VoIP media gateways using packetized RTP streams. IC Role / Device Role / Timing Role: TSI device performing time-slot remapping, echo cancellation path insertion, and jitter buffer pre-alignment before packetization. Use Value: Provides per-channel high-impedance control (via OE/ODE/OSB) to isolate unused paths and reduce crosstalk, while Processor Mode enables real-time status/control exchange with host MCU.

Voice over E1/T1 Line Cards

Distributed Telecom Switch Fabric

Use Scenario: Aggregating 30–32 voice channels from multiple E1 trunks onto a centralized switching matrix in carrier-grade access equipment.

IC Role / Device Role / Timing Role: Time slot interchange switch performing dynamic channel routing, frame synchronization, and per-channel delay management between RX and TX streams.

Use Value: Enables real-time voice path reconfiguration with sub-frame latency (≤3 time-slots) and maintains E1 frame alignment across distributed shelves via programmable input offset registers.

Use Scenario: Interfacing multiple DSP farms and line interface units (LIUs) in modular central office switches requiring scalable, non-blocking TSI.

IC Role / Device Role / Timing Role: Digital switch fabric element handling 512×512 channel cross-connects with automatic ST-BUS®/GCI detection and multi-stream frame offset calibration.

Use Value: Reduces system-level timing complexity by auto-calibrating inter-chip frame skew and supporting broadcast/multicast via connection memory addressing.

DSLAM Channel Aggregation

VoIP Gateway Media Processing

Use Scenario: Consolidating ADSL2+ downstream data channels (N×64 kbit/s) across multiple line cards into a unified ATM or IP backplane interface.

IC Role / Device Role / Timing Role: Constant-delay TSI switch ensuring frame-aligned transport of concatenated data payloads across serial backplanes with deterministic latency.

Use Value: Preserves G.992.3/G.992.5 frame structure end-to-end by enforcing 1-frame minimum constant delay and supporting WFP mode for wide-pulse synchronization.

Use Scenario: Bridging TDM voice traffic from PSTN interfaces to VoIP media gateways using packetized RTP streams.

IC Role / Device Role / Timing Role: TSI device performing time-slot remapping, echo cancellation path insertion, and jitter buffer pre-alignment before packetization.

Use Value: Provides per-channel high-impedance control (via OE/ODE/OSB) to isolate unused paths and reduce crosstalk, while Processor Mode enables real-time status/control exchange with host MCU.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IDT72V70800PF	Identical functionality and pinout, but in 64-pin TQFP (0.80 mm pitch, 14 mm × 14 mm) instead of STQFP; higher thermal resistance and larger footprint.	Suitable for legacy PCBs designed for TQFP packages; less suitable for space-constrained telecom modules where STQFP's 10 mm × 10 mm size is required.	Select IDT72V70800PF only when board layout cannot accommodate STQFP mechanical constraints or when existing TQFP tooling is in place.
CY7C1355V	256 × 256 capacity, 3.3 V, supports only ST-BUS® (no GCI auto-detect or WFP mode); lacks per-stream frame offset registers and memory block programming.	Limited to smaller-scale TSI applications; no support for concatenated data channel alignment or multi-chip skew compensation.	Choose CY7C1355V only for cost-sensitive, lower-density designs where full 512×512 capacity and advanced frame alignment features are unnecessary.

Compared with IDT72V70800PF, the IDT72V70800TF offers superior board-area efficiency and thermal performance in compact telecom modules; compared with CY7C1355V, it delivers double switching capacity, dual-interface flexibility, and deterministic skew compensation essential for carrier-grade systems.

Availability

IDT72V70800TF is available at Aetrix Electronics and suitable for voice over E1/T1 line cards, distributed telecom switch fabric, DSLAM channel aggregation, and VoIP gateway media processing requiring stable component supply across extended product lifecycles.

Supply support for IDT72V70800TF 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 IDT72V70800TF belongs to IDT's time slot interchange (TSI) digital switch product line, engineered specifically for carrier-class telecommunication infrastructure requiring deterministic latency, multi-standard interface support, and robust frame alignment under variable backplane conditions.

FAQ

What is the primary function of the IDT72V70800TF in telecom systems?

The IDT72V70800TF serves as a 512 × 512 non-blocking time slot interchange digital switch that routes individual 64 kbit/s PCM channels between up to four 8.192 Mb/s serial streams. It enables dynamic voice/data path reconfiguration in E1/T1 line cards, DSLAMs, and VoIP gateways while maintaining frame integrity and minimizing latency through configurable per-channel delay modes.

How does the IDT72V70800TF handle different framing standards like ST-BUS® and GCI?

The IDT72V70800TF automatically detects ST-BUS® or GCI framing by analyzing the polarity and edge timing of the F0i frame pulse input when WFPS = LOW. In ST-BUS® mode, it samples data on the rising edge of CLK three-quarters into the bit cell; in GCI mode, it samples on the falling edge. This eliminates manual configuration and external framing logic.

Can the IDT72V70800TF compensate for timing skew between serial input streams?

Yes, the IDT72V70800TF provides per-stream frame input offset programming via dedicated FOR registers. Each stream can be delayed by up to +4.5 CLK periods (½-cycle resolution) to align input frames across distributed backplanes - a critical capability for multi-chip switch fabrics where path lengths vary.

What microprocessor interface modes does the IDT72V70800TF support?

The IDT72V70800TF supports both multiplexed and non-multiplexed parallel bus interfaces via the IM pin. When IM = LOW, it accepts Motorola-style non-multiplexed operation (separate A0–A7 and AD0–AD7/D8–D15); when IM = HIGH, it auto-detects Intel (RD/WR) or Motorola (DS/RD, R/W) multiplexed timing based on DS/RD and AS/ALE states.

Is the IDT72V70800TF compatible with 5 V logic systems?

Yes, all I/O pins of the IDT72V70800TF are 5 V tolerant while operating from a 3.3 V supply. This allows direct interfacing with legacy 5 V microcontrollers, FPGAs, and peripheral logic without level-shifting circuitry - simplifying design and reducing BOM cost in mixed-voltage telecom platforms.

IDT72V70800TF Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: 72V

Package/Case:: 64-LQFP

Packaging:: Tray

Product Status:: Obsolete

Type:: Multiplexer

Circuit:: 1 x 4:4

Independent Circuits:: 1

Current - Output High, Low:: -

Voltage Supply Source:: Single Supply

Voltage - Supply:: 3V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 64-TQFP (10x10)

IDT72V70800TF FAQ

1.How can I place an order for IDT72V70800TF through Aetrix?

Please submit a Request for Quotation (RFQ) for IDT72V70800TF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for IDT72V70800TF reliable?

The price and inventory of IDT72V70800TF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT72V70800TF is usually 5 days.

3.What payment methods are accepted for IDT72V70800TF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT72V70800TF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IDT72V70800TF?

IDT72V70800TF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IDT72V70800TF order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for IDT72V70800TF?

For technical support, including IDT72V70800TF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT72V70800TF requirements.

6.How does Aetrix verify that IDT72V70800TF is sourced from the original manufacturer or authorized distributors?

All IDT72V70800TF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that IDT72V70800TF meets industry standards.

7.What is the process for return or replacement of IDT72V70800TF?

All IDT72V70800TF units undergo pre-shipment inspection (PSI). If there is an issue with IDT72V70800TF, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The IDT72V70800TF part is unused and in its original packaging.

Return procedure for IDT72V70800TF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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