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Renesas 7290820PQF
- Part No.:
- 7290820PQF
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 100-BQFP
- Datasheet:
-
7290820PQF.pdf
- Description:
- IC MULTIPLEXER 1 X 16:16 100PQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,901
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Product details
Overview
IDT7290820PQF from Integrated Device Technology, Inc. is a 5V, 2,048 × 2,048 non-blocking time slot interchange (TSI) digital switch optimized for ST-BUS®/GCI and wide frame pulse (WFP) telecommunication interfaces. It supports serial data rates of 2.048 Mb/s, 4.096 Mb/s, or 8.192 Mb/s with per-channel variable or constant throughput delay, IEEE-1149.1 JTAG test port, and operates across –40°C to +85°C. It is used in TDM-based voice/data switching systems requiring precise channel-level time-slot routing.
For engineers reviewing the IDT7290820PQF datasheet, IDT7290820PQF pinout, IDT7290820PQF application, or IDT7290820PQF equivalent, key selection considerations include serial interface timing mode (ST-BUS®/GCI vs. WFP), microprocessor bus compatibility (Intel/Motorola multiplexed/non-multiplexed), per-channel high-impedance control via ODE and connection memory, frame offset calibration capability, and 100-pin PQFP package mechanical constraints.
Technical Context
The IDT7290820PQF implements a dual-mode serial interface: ST-BUS®/GCI with automatic frame format detection and WFP mode requiring 4.096 MHz HCLK and 16.384 MHz CLK. Its internal architecture includes parallel-to-serial/serial-to-parallel converters, 8KHz frame-aligned data memory (up to 2,048 bytes), and connection memory with per-channel control bits (PC, V/C, LPBK, OE, CCO).
Switching operation occurs in either Connection Mode-where connection memory addresses source channels in data memory-or Processor Mode-where microprocessor-written data is output directly on TX streams. Frame offset calibration uses FE/HCLK to measure input skew up to ±4.5 CLK periods, programmable per RX stream via FOR registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Capacity | 2,048 × 2,048 channels at 8.192 Mb/s; scales to 1,024 × 1,024 at 4.096 Mb/s and 512 × 512 at 2.048 Mb/s - defines maximum concurrent PCM time-slot interchanges. |
| Serial Data Rate | 2.048 / 4.096 / 8.192 Mb/s - determines frame width (125 µs), channel count per frame (32/64/128), and required master clock (4.096 / 8.192 / 16.384 MHz). |
| Throughput Delay | Variable mode: min. 3 time-slots; Constant mode: fixed 1-frame delay - enables low-latency voice routing or frame-integrity-critical data transport. |
| Interface Compatibility | Intel/Motorola multiplexed & non-multiplexed CPU buses - eliminates external glue logic via configurable IM, AS/ALE, DS/RD, R/W/WR signal mapping. |
| JTAG Support | IEEE-1149.1 compliant TAP controller (TMS, TDI, TDO, TCK, TRST) - enables boundary-scan testing and in-system diagnostics without functional interruption. |
| Operating Voltage | +5.0 V ±5% - powers all I/O and core logic; all digital pins are 5V-tolerant, simplifying level translation in legacy telecom designs. |
| Temperature Range | –40°C to +85°C - qualified for industrial and telecom infrastructure environments including central office and remote terminal applications. |
Pinout & Package
Package: 100-pin Plastic Quad Flatpack (PQFP), 0.65 mm pitch, 14 mm × 20 mm footprint (order code PQF). Pin 1 marked by index notch; A1 corner located at top-left when notch faces upward.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RX0–RX15 | Serial input streams | 16 bidirectional 5V-tolerant inputs accepting 2.048/4.096/8.192 Mb/s ST-BUS®/GCI or WFP-formatted data; each independently calibratable for frame offset. |
| TX0–TX15 | Serial output streams | 16 three-state 5V-tolerant outputs mirroring RX data rate; per-channel high-impedance controlled by ODE pin and OSB bit or individual connection memory OE bits. |
| ODE | Output drive enable | Global active-low control: when LOW and OSB = 1, forces all TX0–TX15 into high-impedance - enables hot-swap and system-level power management. |
| F0i, FE/HCLK | Frame synchronization | F0i accepts 8 kHz frame pulses (ST-BUS®/GCI); FE/HCLK serves as frame evaluation input (ST-BUS®/GCI) or 4.096 MHz HCLK (WFP mode). |
| CLK | Master clock input | Accepts 4.096 / 8.192 / 16.384 MHz - must be exactly 2× selected serial data rate; drives all internal timing, including serial shift and memory access. |
| CCO, DTA | Control & status outputs | CCO outputs per-channel CCO bits at serial data rate; DTA is active-low handshake signaling microprocessor bus cycle completion. |
| A0–A7, AD0–AD7, D8–D15 | Microprocessor interface | Supports both multiplexed (AD0–AD7 + D8–D15) and non-multiplexed (A0–A7 + AD0–AD7 + D8–D15) addressing - auto-detected via IM, AS/ALE, DS/RD timing. |
| IM, CS, DS/RD, R/W/WR, AS/ALE | CPU interface control | Configures bus protocol: IM selects multiplexed/non-multiplexed; CS enables port; DS/RD and R/W/WR define read/write strobes per Intel/Motorola conventions. |
Key Features
| Feature | Design Value |
|---|---|
| Per-stream frame delay offset programming | Enables skew compensation across distributed backplanes by assigning independent input frame alignment offsets (±4.5 CLK periods, 0.5 CLK resolution) per RX stream. |
| Automatic ST-BUS®/GCI interface identification | Eliminates manual configuration: detects frame polarity and bit boundary alignment (rising/falling edge of CLK) on F0i to auto-select correct serial timing mode. |
| Memory block programming | Loads identical upper 5 bits (bits 11–15) into all 2,048 connection memory locations within two frames - accelerates initialization of broadcast or multicast routing tables. |
| Internal per-channel loopback | When LPBK = 1 in connection memory, TXn,Chm data routes internally to RXn,Chm - enables real-time channel-level diagnostics without external loop cables or test fixtures. |
| Processor Mode operation | Allows microprocessor to write payload data directly into connection memory for immediate output on TX streams - supports dynamic control channel insertion and status reporting. |
Applications
| PCM Voice Switching | TDM Data Multiplexing |
|---|---|
Use Scenario: Central office digital switch connecting 2,048 E1 lines with dynamic time-slot reassignment for call setup/teardown. IC Role / Device Role / Timing Role: Time slot interchange switch performing non-blocking 64 kbit/s channel routing with sub-frame latency control. Use Value: Achieves minimum 3-time-slot variable delay for voice paths while maintaining strict 125 µs frame alignment across all 16 RX/TX streams. | Use Scenario: Concatenated data transport over E1/T1 where multiple 64 kbit/s sub-channels carry packetized telemetry or SCADA traffic. IC Role / Device Role / Timing Role: TSI device operating in constant delay mode to preserve frame integrity across concatenated payloads. Use Value: Guarantees fixed 1-frame (125 µs) end-to-end delay across all switched channels - essential for deterministic jitter-sensitive protocols. |
| Multi-Chip TSI Expansion | Telecom Line Card Diagnostics |
Use Scenario: Cascaded IDT7290820PQF devices forming a 4,096 × 4,096 switch fabric with inter-device frame synchronization. IC Role / Device Role / Timing Role: Slave TSI node calibrated via FE/HCLK to match master frame offset - compensates for PCB trace length mismatches. Use Value: Enables precise inter-chip time-slot alignment using per-stream input delay registers, eliminating inter-frame slip in large-scale switches. | Use Scenario: Embedded diagnostics on an E1 line card verifying signal path continuity and timing integrity before field deployment. IC Role / Device Role / Timing Role: Self-test engine using internal loopback (LPBK) and JTAG boundary scan to validate RX→TX channel mapping. Use Value: Confirms per-channel routing correctness without external test equipment - reduces manufacturing test time and field failure root-cause analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar time slot interchange applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT7290810PQF | 1,024 × 1,024 capacity; supports only up to 4.096 Mb/s; lacks WFP mode and CCO output. | Suitable for smaller-scale E1 concentrators or legacy systems without wide frame pulse requirements. | Select when full 2,048 × 2,048 capacity and WFP support are unnecessary - reduces cost and board space. |
| CY22394FXC | Programmable clock generator with integrated TSI logic; no standalone TSI function; requires external memory and microcontroller coordination. | Used in mixed-signal SoC-like architectures where clock synthesis and lightweight time-slot routing are co-located. | Choose only if clock generation and minimal TSI functionality are integrated into a single chip - not a drop-in replacement. |
Compared with IDT7290810PQF, the IDT7290820PQF delivers double switching capacity and WFP mode support; compared with CY22394FXC, it provides autonomous, self-contained TSI operation with dedicated connection memory and JTAG test infrastructure - critical for carrier-grade reliability.
Availability
IDT7290820PQF is available at Aetrix Electronics and suitable for PCM voice switching, TDM data multiplexing, multi-chip TSI expansion, and telecom line card diagnostics requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for IDT7290820PQF 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, Inc. (IDT) was a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance interconnect solutions before its acquisition by Renesas Electronics in 2019.
The IDT7290820PQF belongs to IDT's legacy TSI digital switch product line, designed specifically for carrier-class TDM infrastructure requiring deterministic, low-jitter time-slot routing with flexible microprocessor interfacing and built-in diagnostic capabilities.
FAQ
What is the maximum serial data rate supported by the IDT7290820PQF?
The IDT7290820PQF supports a maximum serial data rate of 8.192 Mb/s, enabling 2,048 × 2,048 non-blocking channel switching. At this rate, it processes 128 time-slots per 125 µs frame using a 16.384 MHz master clock. Lower rates - 4.096 Mb/s (64 slots/frame) and 2.048 Mb/s (32 slots/frame) - are also supported via DR0/DR1 bit configuration in the IMS register. All RX and TX streams operate at the same selected rate.
How does the IDT7290820PQF handle frame synchronization for ST-BUS® and GCI interfaces?
The IDT7290820PQF automatically identifies ST-BUS® or GCI frame formats on the F0i input by detecting frame pulse polarity and bit boundary alignment relative to the CLK signal. In ST-BUS®, bit boundaries align with every second falling CLK edge; in GCI, they align with every second rising CLK edge. This detection occurs at power-up or reset and requires no software configuration - ensuring plug-and-play interoperability with diverse TDM sources.
Can the IDT7290820PQF operate in both Connection Mode and Processor Mode simultaneously?
No - the IDT7290820PQF operates exclusively in one mode per output channel, determined by the PC (Processor Channel) bit in each location of its connection memory. When PC = 1, that TX channel outputs microprocessor-written data (Processor Mode); when PC = 0, it outputs data fetched from data memory using SAB/CAB address bits (Connection Mode). Mode selection is fully per-channel and dynamically reprogrammable.
What is the function of the CCO pin on the IDT7290820PQF?
CCO (Control Output) is a serial output pin carrying per-channel control bits from the connection memory at the current serial data rate - 512 bits/frame at 2.048 Mb/s, 1,024 bits/frame at 4.096 Mb/s, or 2,048 bits/frame at 8.192 Mb/s. Each CCO bit corresponds to one TX channel and is output one time-slot before the associated data, enabling real-time sideband signaling for channel supervision or alarm indication in TDM networks.
Does the IDT7290820PQF require external pull-up resistors on any pins?
Yes - the DTA (Data Transfer Acknowledgment) pin requires an external pull-up resistor to maintain HIGH when in high-impedance state between bus cycles, enabling faster microprocessor interface timing. Additionally, TMS, TDI, TCK, and TRST pins have internal pull-ups but may benefit from external pull-ups in noisy environments to ensure robust JTAG operation during boundary-scan testing.
7290820PQF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 7200
- Package/Case:
- 100-BQFP
- 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:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-PQFP (20x14)
7290820PQF FAQ
1.How can I place an order for 7290820PQF through Aetrix?
Please submit a Request for Quotation (RFQ) for 7290820PQF 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 7290820PQF reliable?
The price and inventory of 7290820PQF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7290820PQF is usually 5 days.
3.What payment methods are accepted for 7290820PQF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7290820PQF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7290820PQF?
7290820PQF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7290820PQF 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 7290820PQF?
For technical support, including 7290820PQF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7290820PQF requirements.
6.How does Aetrix verify that 7290820PQF is sourced from the original manufacturer or authorized distributors?
All 7290820PQF 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 7290820PQF meets industry standards.
7.What is the process for return or replacement of 7290820PQF?
All 7290820PQF units undergo pre-shipment inspection (PSI). If there is an issue with 7290820PQF, 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 7290820PQF part is unused and in its original packaging.
Return procedure for 7290820PQF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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