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Renesas IDT72V73250BB
- Part No.:
- IDT72V73250BB
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 144-BGA
- Datasheet:
-
IDT72V73250BB.pdf
- Description:
- IC MULTIPLEXER 1 X 16:16 144PBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,514
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Product details
Overview
IDT72V73250 from Integrated Device Technology is a 3.3 V, 8,192 × 8,192 non-blocking time slot interchange (TSI) digital switch optimized for TDM voice and data applications. It supports 16 serial input/output streams at 32.768 Mb/s, delivers per-channel variable or constant delay modes, integrates IEEE-1149.1 JTAG test access, and operates across –40°C to +85°C. Used in ST-BUS®/GCI-based telephony infrastructure for PCM channel routing.
For engineers reviewing the IDT72V73250 datasheet, IDT72V73250 pinout, IDT72V73250 application, or IDT72V73250 equivalent, key selection criteria include frame-aligned input offset programming, per-stream throughput delay control (variable vs. constant), microprocessor-accessible connection memory mapping, and dual-package availability (PBGA BB and TQFP DA).
Technical Context
The IDT72V73250 implements a fully non-blocking TSI architecture with separate Data Memory (for RX-to-TX path storage) and Connection Memory (for routing configuration). Its dual-mode operation-Processor Mode (microprocessor-driven per-channel output) and Connection Mode (memory-mapped time-slot mapping)-enables flexible integration into multi-device TDM backplanes.
It features automatic ST-BUS®/GCI interface detection, frame pulse (F32i)-synchronized 125 μs frame alignment, and programmable per-input-stream frame offset (±7.5 C32i cycles in 0.5-cycle steps) to compensate for inter-stream skew. The JTAG TAP controller supports boundary-scan testing and in-system debug of internal register states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Capacity | 8,192 × 8,192 non-blocking channels - enables full crosspoint routing of all PCM time slots without contention. |
| Data Rate | 32.768 Mb/s per stream - supports 512 channels per 125 μs frame at 64 kbit/s per channel. |
| Delay Modes | Per-channel Variable Delay (min. 3 time-slots) or Constant Delay (1 frame + 1 channel) - selectable via MOD1–0 bits in Connection Memory. |
| Input Offset Range | +0 to +7.5 C32i clock cycles (½-cycle resolution) - compensates for physical-layer skew across 16 RX streams. |
| Operating Voltage | 3.3 V ±0.3 V - requires single-supply rail; compatible with LVTTL I/O levels and 3.3 V system logic. |
| Temperature Range | –40°C to +85°C - qualified for industrial-grade telecom equipment deployment. |
| Package Options | 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). |
Pinout & Package
Available in two industrial-grade packages: 144-pin Plastic Ball Grid Array (PBGA, BB suffix) and 144-pin Thin Quad Flatpack (TQFP, DA suffix). Both support identical pin functions and electrical specifications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Bus | 15-bit address lines for accessing Control Register, Frame Alignment Register, Frame Offset Registers, Data Memory, and Connection Memory. |
| D0–D15 | Data Bus | 16-bit bidirectional microprocessor interface bus; used for read/write of internal memories and registers. |
| CS, R/W, DS | Microprocessor Interface Control | Chip Select (active-low), Read/Write direction, and Data Strobe enable standard RAM-like memory-mapped access. |
| RX0–RX15 | Serial Input Streams | 16 unidirectional 32.768 Mb/s serial inputs; accept PCM/GCI-formatted bit streams synchronized to F32i. |
| TX0–TX7, TX8/OEI0–TX15/OEI7 | Serial Output Streams / OE Indication | 16 three-state outputs; TX8–TX15 double as output-enable indicators when OEI=1 in Control Register. |
| F32i, C32i | Frame & Master Clock Inputs | F32i accepts 8 kHz frame sync (ST-BUS®/GCI auto-detected); C32i is 32.768 MHz master clock for internal timing. |
| ODE, RESET, TRST | Global Control Inputs | ODE enables/disables all TX drivers; RESET clears internal state; TRST asynchronously initializes JTAG TAP controller. |
| TCK, TDI, TDO, TMS | JTAG Test Port | IEEE-1149.1 compliant boundary-scan interface for test, debug, and in-system programming. |
Key Features
| Feature | Design Value |
|---|---|
| Per-stream input frame offset programming | Enables skew compensation up to +7.5 C32i cycles in 0.5-cycle increments per RXn, critical for distributed TDM systems. |
| Variable or constant throughput delay mode | Variable mode minimizes latency for voice (3-slot min delay); constant mode preserves frame integrity for data (1-frame+1-slot fixed delay). |
| Automatic ST-BUS®/GCI interface detection | Eliminates manual configuration: device senses frame format on F32i and configures serial I/O timing (rising/falling edge sampling) automatically. |
| Memory block programming | Loads Connection Memory bits 14–15 across all 8,192 locations in two frames-accelerates initialization and reduces boot-time overhead. |
| Direct microprocessor access to all internal memories | 15-bit address + 16-bit data bus maps seamlessly to RAM-style addressing, enabling real-time path reconfiguration without firmware overhead. |
Applications
| Voice over TDM Switching | PCM Multiplexing in Access Networks |
|---|---|
|
Use Scenario: Central office switching fabric routing 64 kbit/s PCM voice channels between E1/T1 line cards and trunk interfaces. IC Role / Device Role / Timing Role: Time slot interchange switch performing non-blocking, low-latency channel mapping with per-call delay optimization. Use Value: Enables dynamic call setup with <3-slot variable delay, preserving voice quality while supporting >8K concurrent calls per device. |
Use Scenario: DSLAM or MSAN aggregation node consolidating multiple E1 feeds into high-speed backplane links. IC Role / Device Role / Timing Role: TSI core managing time-slot rearrangement across 16 serial streams to align payload boundaries for packet encapsulation. Use Value: Maintains strict frame integrity using Constant Delay Mode, ensuring zero bit slips during multiplexing into ATM or PTM frames. |
| GCI-Based Base Station Interconnect | ST-BUS® Telephony Gateway |
|
Use Scenario: Wireless infrastructure unit connecting GSM/UMTS baseband processors to radio units via GCI-compliant serial links. IC Role / Device Role / Timing Role: Digital switch bridging GCI-format streams with automatic protocol detection and frame-aligned buffering. Use Value: Eliminates external protocol translation logic; supports GCI timing (data on rising edge, sample on falling edge) without FPGA glue logic. |
Use Scenario: VoIP gateway converting analog/PSTN lines to IP media streams using ST-BUS®-interfaced CODECs. IC Role / Device Role / Timing Role: TSI routing time slots between ST-BUS® CODEC interfaces and DSP resources under microprocessor control. Use Value: Leverages Processor Mode to allow host CPU to dynamically assign time slots per call, enabling flexible resource allocation and echo cancellation path insertion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar time slot interchange applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT72V73260 | Same architecture but supports 16 RX/16 TX with full Output Enable Indication (OEI) on all 16 pins; no shared TX/OEI pin function. | Better suited for systems requiring simultaneous OE status visibility across all outputs without pin multiplexing. | Select IDT72V73260 when OEI monitoring on all 16 streams is required; IDT72V73250 suffices if OEI is needed only on TX8–TX15 or unused. |
| Cypress CY7C68013A | USB microcontroller with integrated FIFOs-not a dedicated TSI; lacks per-channel delay control, frame offset, or ST-BUS®/GCI auto-detection. | Targeted at USB bridge applications, not TDM switching; requires external logic for time-slot routing. | IDT72V73250 provides native TSI functionality with hardware-accelerated routing; CY7C68013A is not a functional alternative for TSI tasks. |
Compared with IDT72V73260, IDT72V73250 trades full OEI pin availability for lower pin-count flexibility; compared with general-purpose microcontrollers like CY7C68013A, it delivers deterministic, low-latency TSI performance without firmware intervention or external memory management.
Availability
IDT72V73250 is available at Aetrix Electronics and suitable for telecom infrastructure, voice gateways, and TDM access networks requiring stable component supply, long-lifecycle support, and industrial temperature operation.
Supply support for IDT72V73250 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 communications ICs for networking, telecom, and computing markets.
The IDT72V73250 belongs to IDT's TSI digital switch product line, engineered specifically for carrier-grade TDM time-slot routing in voice and data transport systems with strict jitter, latency, and frame-integrity requirements.
FAQ
What is the primary function of the IDT72V73250?
The IDT72V73250 is a dedicated time slot interchange (TSI) digital switch that routes individual PCM time slots between 16 serial input and 16 serial output streams. It performs non-blocking 8,192 × 8,192 channel switching at 32.768 Mb/s, supporting both voice-optimized variable delay and data-optimized constant delay modes. Its architecture is purpose-built for TDM infrastructure-not general-purpose logic or microcontroller use.
Does the IDT72V73250 support both ST-BUS® and GCI interfaces?
Yes, the IDT72V73250 automatically detects and adapts to either ST-BUS® or GCI frame formats using the F32i input signal. In ST-BUS® mode, data is sampled on the rising edge and output on the falling edge of C32i; in GCI mode, the timing is inverted. This eliminates manual configuration and ensures interoperability with both legacy and modern TDM protocols without external logic.
How does the IDT72V73250 handle input stream skew?
The IDT72V73250 compensates for inter-stream skew via programmable per-input-frame offset registers (FOR0–FOR3), allowing each RX0–RX15 stream to be delayed by up to +7.5 C32i clock cycles in 0.5-cycle increments. This is measured using the Frame Evaluation (FE) input and stored in the Frame Alignment Register (FAR), enabling precise alignment before switching.
What are the key differences between Variable and Constant Delay modes in the IDT72V73250?
In Variable Delay Mode (MOD1–0 = 00), the IDT72V73250 minimizes latency-achieving as low as 3 time-slots-for voice applications where end-to-end delay matters most. In Constant Delay Mode (MOD1–0 = 01), it guarantees fixed 1-frame+1-slot delay across all paths, preserving frame structure for data applications like ATM cell transport where bit alignment is critical.
Can the IDT72V73250 be configured via a microprocessor?
Yes, the IDT72V73250 features a full 15-bit address / 16-bit data microprocessor interface that mirrors standard RAM timing. It supports direct read/write access to Control Register, Frame Alignment Register, Frame Offset Registers, Data Memory, and Connection Memory-enabling runtime path reconfiguration, diagnostics, and initialization without external FPGA or CPLD logic.
IDT72V73250BB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 72V
- Package/Case:
- 144-BGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- Multiplexer
- Circuit:
- 1 x 16:16
- 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:
- 144-PBGA (13x13)
IDT72V73250BB FAQ
1.How can I place an order for IDT72V73250BB through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT72V73250BB 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 IDT72V73250BB reliable?
The price and inventory of IDT72V73250BB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT72V73250BB is usually 5 days.
3.What payment methods are accepted for IDT72V73250BB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT72V73250BB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT72V73250BB?
IDT72V73250BB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT72V73250BB 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 IDT72V73250BB?
For technical support, including IDT72V73250BB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT72V73250BB requirements.
6.How does Aetrix verify that IDT72V73250BB is sourced from the original manufacturer or authorized distributors?
All IDT72V73250BB 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 IDT72V73250BB meets industry standards.
7.What is the process for return or replacement of IDT72V73250BB?
All IDT72V73250BB units undergo pre-shipment inspection (PSI). If there is an issue with IDT72V73250BB, 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 IDT72V73250BB part is unused and in its original packaging.
Return procedure for IDT72V73250BB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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