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Renesas 72V70800PFG8
- Part No.:
- 72V70800PFG8
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 64-LQFP
- Datasheet:
-
72V70800PFG8.pdf
- Description:
- IC MULTIPLEXER 1 X 4:4 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,163
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Product details
Overview
IDT72V70800PFG8 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) voice/data transport. It supports four 8.192 Mb/s serial streams, per-channel variable or constant throughput delay, and 3.3 V I/O with 5 V tolerant inputs. Used in telecom access gateways and TDM multiplexers for channelized voice routing.
For engineers reviewing the IDT72V70800PFG8 datasheet, IDT72V70800PFG8 pinout, IDT72V70800PFG8 application, or IDT72V70800PFG8 equivalent, key selection criteria include frame alignment calibration capability, per-channel high-impedance control, microprocessor interface mode flexibility (Intel/Motorola/non-multiplexed), and support for both ST-BUS®/GCI auto-detection and WFP timing modes.
Technical Context
The IDT72V70800PFG8 implements a dual-mode serial interface: ST-BUS®/GCI with automatic polarity/frame format detection when WFPS = LOW, and WFP mode with 4.096 MHz HCLK alignment when WFPS = HIGH. Its internal architecture includes separate data memory (up to 512 bytes) and connection memory (128 × 16-bit locations), each accessible via A7-based address decoding.
Throughput delay is configurable per channel: variable delay mode achieves minimum 3-time-slot latency for voice, while constant delay mode guarantees fixed 1-frame (125 µs) latency for data integrity. Frame offset calibration uses FE/HCLK input and FAR register (FD11–FD0) to measure and compensate up to +4.5 CLK periods (±½-cycle resolution) of input stream skew.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Capacity | 512 × 512 channels at 8.192 Mb/s - enables full TDM cross-connect of E1/T1-equivalent time slots without blocking. |
| Serial Data Rate | 8.192 Mb/s per RX/TX stream - matches standard PCM/E1 framing (32 × 64 kbps), requiring 16.384 MHz master clock (CLK). |
| Delay Modes | Per-channel selectable variable (min. 3 time-slots) or constant (fixed 125 µs) throughput delay - preserves voice latency or data frame integrity. |
| Frame Alignment | Auto-detects ST-BUS®/GCI formats or uses WFP mode with 4.096 MHz HCLK - eliminates external glue logic for multi-standard sync handling. |
| Supply & I/O | 3.3 V core supply with 5 V tolerant inputs - allows direct interfacing to legacy 5 V control logic without level shifters. |
| Operating Temp | −40°C to +85°C commercial range - suitable for industrial telecom line cards and remote DSLAM modules. |
| Package | 64-pin TQFP (14 mm × 14 mm, 0.8 mm pitch, PF suffix) - standard surface-mount footprint compatible with automated assembly. |
Pinout & Package
Package: 64-pin Thin Quad Flatpack (TQFP), 14 mm × 14 mm, 0.8 mm lead pitch, RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pins 1, 24, 37, 49) | Power Supply | +3.3 V core supply rail; four dedicated pins reduce IR drop and improve noise immunity across high-speed switching. |
| GND (Pins 2, 11, 23, 36, 41, 48, 64) | Ground Reference | Seven ground pins provide low-inductance return paths for serial I/O, microport, and internal logic domains. |
| RX0–RX3 (Pins 38–41) | Serial Input | Four 8.192 Mb/s differential-capable inputs accepting ST-BUS®/GCI/WFP frame-aligned PCM data. |
| TX0–TX3 (Pins 9–12) | Serial Output | Three-state outputs with per-channel OE control and global ODE/OSB override - enables dynamic output muting. |
| F0i (Pin 42) | Frame Sync Input | Accepts 8 kHz frame pulse; auto-identifies ST-BUS® (falling-edge aligned) or GCI (rising-edge aligned) format. |
| FE/HCLK (Pin 35) | Frame Evaluation / Clock | In ST-BUS®/GCI mode: measures input frame skew vs. F0i; in WFP mode: provides 4.096 MHz alignment clock. |
| CLK (Pin 34) | Master Clock | 16.384 MHz input driving all serial shift registers - must be exactly 2× data rate for bit sampling accuracy. |
| IM (Pin 32) | CPU Interface Mode | Selects multiplexed (IM = HIGH) or non-multiplexed (IM = LOW) microprocessor bus - configures AD0–AD7 function. |
| CS, DS/RD, R/W/WR, AS/ALE (Pins 33, 31, 30, 29) | Microport Control | Supports Intel 8080-style (RD/WR) and Motorola 68k-style (DS/R/W) timing - eliminates external bus translators. |
| AD0–AD7, D8–D15 (Pins 17–22, 25–28) | Data Bus | 16-bit parallel interface: AD0–AD7 multiplexed address/data in mode 1/2; D8–D15 upper data byte for full 16-bit transfers. |
| A0–A7 (Pins 43–50) | Address Bus | Non-multiplexed 8-bit address lines - used only in Motorola non-multiplexed mode for register/memory access. |
| DTA (Pin 16) | Data Transfer Ack | Active-low open-drain signal indicating microport cycle completion - enables faster bus turnaround with weak pull-up. |
| ODE (Pin 15) | Output Drive Enable | Global enable/disable for TX0–TX3 drivers - overrides per-channel OE bits when asserted low. |
| RESET (Pin 39) | Asynchronous Reset | Active-low Schmitt-trigger input clearing all registers and forcing TX outputs to high-impedance on power-up or fault. |
| WFPS (Pin 44) | Wide Frame Pulse Select | High = WFP mode (HCLK required); Low = ST-BUS®/GCI auto-detect mode - selects fundamental timing architecture. |
Key Features
| Feature | Design Value |
|---|---|
| Per-stream frame delay offset programming | Compensates up to +4.5 CLK periods (±½-cycle resolution) of inter-stream skew - critical for multi-chip TDM backplanes. |
| Automatic ST-BUS®/GCI interface identification | Detects frame polarity and format on F0i without configuration - reduces firmware initialization complexity in mixed-standard systems. |
| Processor Mode with per-channel control | Allows microprocessor to write time-slot data directly to TX streams - enables real-time status/control insertion (e.g., CAS signaling). |
| Connection memory block programming | Loads 5-bit pattern into bits 11–15 of all 128 connection memory locations in two frames - accelerates boot-time path setup. |
| Internal loopback per channel | LPBK bit routes TXn,m → RXn,m internally - enables per-channel diagnostics without external cabling or test equipment. |
Applications
| Voice over E1/T1 Access Gateway | TDM Multiplexer (MUX/DEMUX) |
|---|---|
|
Use Scenario: Aggregating 30–32 analog voice lines into E1 (2.048 Mbps) or T1 (1.544 Mbps) trunks for PSTN interconnection. IC Role / Device Role / Timing Role: Time slot interchange switch performing channel mapping, echo cancellation path insertion, and CAS signaling overlay. Use Value: Enables flexible, software-defined voice channel routing with sub-125 µs latency in variable delay mode - meets ITU-T G.114 one-way delay requirements. |
Use Scenario: Combining multiple lower-rate TDM streams (e.g., four E1s) into a single high-capacity STM-1 OC-3 interface. IC Role / Device Role / Timing Role: Digital switch providing non-blocking cross-connect between input and output serial streams with frame integrity preservation. Use Value: Maintains constant 125 µs throughput delay across all paths in constant delay mode - ensures synchronous payload alignment for SONET/SDH mapping. |
| VoIP Media Gateway | Digital Loop Carrier (DLC) System |
|
Use Scenario: Bridging circuit-switched PSTN traffic with packet-based VoIP networks using TDM-over-IP gateways. IC Role / Device Role / Timing Role: TSI device extracting individual voice channels from E1 frames for transcoding and RTP packetization. Use Value: Per-channel high-impedance control allows dynamic channel disabling during silence suppression - reduces unnecessary DSP load and bandwidth usage. |
Use Scenario: Remote terminal in copper-based DSLAM deployments serving 24–48 subscriber lines with integrated POTS splitting. IC Role / Device Role / Timing Role: Central TSI managing time-slot allocation between line cards, trunk interfaces, and maintenance/test buses. Use Value: Frame offset calibration compensates for PCB trace length mismatches across distributed line card slots - ensures deterministic jitter-free TDM timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar time slot interchange applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT72V70900PFG8 | Same 512×512 capacity but supports 16.384 Mb/s serial rate (dual E1/T1) and wider −40°C to +105°C temp range. | Required for higher-bandwidth aggregation (e.g., dual-E1 trunking) or extended-temperature base station environments. | Select IDT72V70900PFG8 when serial data rate exceeds 8.192 Mb/s or ambient temperature exceeds +85°C. |
| PMC45128-FT | 128×128 capacity, 3.3 V, supports ST-BUS®/GCI but lacks WFP mode and frame offset calibration registers. | Suitable for cost-sensitive, lower-port-count access nodes where multi-chip skew compensation is not required. | Choose PMC45128-FT for simplified 128-channel TSI functions without advanced calibration or wide-frame support. |
Compared with IDT72V70800PFG8, IDT72V70900PFG8 offers higher serial bandwidth and extended temperature operation but shares identical pinout and register map; PMC45128-FT provides functional overlap for smaller-scale TSI tasks but omits per-stream skew compensation and WFP timing - limiting use in large distributed switches.
Availability
IDT72V70800PFG8 is available at Aetrix Electronics and suitable for telecom access gateways, TDM multiplexers, and VoIP media gateways requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for IDT72V70800PFG8 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 RF products for communications infrastructure and computing markets.
IDT72V70800PFG8 belongs to IDT's legacy TSI digital switch family, engineered specifically for carrier-grade TDM voice and data transport in E1/T1, ISDN, and digital loop carrier systems.
FAQ
What is the maximum serial data rate supported by the IDT72V70800PFG8?
The IDT72V70800PFG8 supports a maximum serial data rate of 8.192 Mb/s per RX/TX stream. This rate corresponds to standard E1 (32 × 64 kbps) or T1 (24 × 64 kbps) PCM framing. The device requires a 16.384 MHz master clock (CLK) - exactly twice the data rate - to maintain accurate bit sampling and frame alignment across all four serial streams.
How does the IDT72V70800PFG8 handle frame synchronization for ST-BUS® and GCI interfaces?
The IDT72V70800PFG8 automatically detects and identifies ST-BUS® or GCI frame formats on the F0i input when WFPS = LOW. In ST-BUS® mode, it aligns to falling edges of the 8 kHz frame pulse; in GCI mode, it aligns to rising edges. The FE/HCLK pin enables precise measurement of input frame offset relative to F0i, allowing programmable per-stream delay compensation to correct for PCB or backplane skew.
Can the IDT72V70800PFG8 operate in both variable and constant throughput delay modes simultaneously?
Yes - the IDT72V70800PFG8 supports per-channel selection of variable or constant throughput delay via the V/C bit in each connection memory location. Voice channels can be configured for variable delay (min. 3 time-slots) to minimize latency, while data channels use constant delay (fixed 125 µs) to preserve frame integrity. Both modes coexist within the same device without hardware reconfiguration.
What microprocessor bus interfaces does the IDT72V70800PFG8 support?
The IDT72V70800PFG8 supports Intel 8080-style (RD/WR control), Motorola 68k-style (DS/R/W control), and Motorola non-multiplexed (separate A0–A7 and AD0–AD7) interfaces. The IM pin selects multiplexed (IM = HIGH) or non-multiplexed (IM = LOW) operation, and internal logic resolves signal naming differences - eliminating external bus translators in mixed-architecture designs.
Is the IDT72V70800PFG8 pin-compatible with other devices in the IDT72V70xx family?
The IDT72V70800PFG8 shares the same 64-pin TQFP package and pinout with IDT72V70900PFG8, enabling drop-in replacement when higher serial rates (16.384 Mb/s) or extended temperature range (−40°C to +105°C) are needed. However, it is not pin-compatible with lower-capacity variants like IDT72V70500 due to differing internal memory maps and register layouts.
72V70800PFG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 72V
- Package/Case:
- 64-LQFP
- Packaging:
- Tape & Reel (TR)
- 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 (14x14)
72V70800PFG8 FAQ
1.How can I place an order for 72V70800PFG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 72V70800PFG8 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 72V70800PFG8 reliable?
The price and inventory of 72V70800PFG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 72V70800PFG8 is usually 5 days.
3.What payment methods are accepted for 72V70800PFG8?
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4.How is shipping managed for 72V70800PFG8?
72V70800PFG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 72V70800PFG8 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 72V70800PFG8?
For technical support, including 72V70800PFG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 72V70800PFG8 requirements.
6.How does Aetrix verify that 72V70800PFG8 is sourced from the original manufacturer or authorized distributors?
All 72V70800PFG8 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 72V70800PFG8 meets industry standards.
7.What is the process for return or replacement of 72V70800PFG8?
All 72V70800PFG8 units undergo pre-shipment inspection (PSI). If there is an issue with 72V70800PFG8, 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 72V70800PFG8 part is unused and in its original packaging.
Return procedure for 72V70800PFG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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