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Texas Instruments SN74GTLPH1627DGGR
- Part No.:
- SN74GTLPH1627DGGR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74GTLPH1627DGGR.pdf
- Description:
- IC TRANSLATOR BIDIR 64TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,342
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Product details
Overview
SN74GTLPH1627DGGR from Texas Instruments is an 18-bit bidirectional LVTTL-to-GTLP bus transceiver with source-synchronous clock outputs (SSCLK, CLKOUT), supporting 175 MHz clock frequency, 100 mA GTLP drive strength, and FSTA-adjustable clock-data skew. It enables high-speed backplane interfacing between LVTTL logic cards and GTLP-terminated backplanes in telecom switching systems.
For engineers reviewing the SN74GTLPH1627DGGR datasheet, SN74GTLPH1627DGGR pinout, SN74GTLPH1627DGGR application, or SN74GTLPH1627DGGR equivalent, key selection criteria include GTLP/LVTTL level translation capability, live-insertion support (Ioff, BIAS VCC), adjustable edge-rate control (ERC), flexible clock-mode select (CMS), and distributed-load backplane timing compliance.
Technical Context
The SN74GTLPH1627DGGR implements dual-path data flow: A-port (LVTTL, 5-V tolerant) ↔ B-port (GTLP, VREF-referenced), with independent DIR/OE/CKOE control for transparent or latched operation. Its TI-OPC and OEC circuitry actively suppresses ringing and EMI on unevenly loaded backplanes.
It integrates a flexible clock architecture: SYSCLK input drives both SSCLK (GTLP-level source-synchronous clock) and CLKOUT (LVTTL-level buffered clock), with FSTA pin selecting fast/slow clock-to-data delay (2.3 ns / 2.8 ns typical) to minimize skew in high-frequency source-synchronous systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bus Width | 18-bit bidirectional data path (A1–A18, B1–B18) |
| Logic Family | LVTTL inputs (5-V tolerant); GTLP outputs (VTT = 1.5 V, VREF = 1 V) |
| Max Clock Frequency | 175 MHz - supports high-throughput backplane data transfer |
| Output Drive | 100 mA GTLP sink current - enables incident-wave switching into 11 Ω backplane loads |
| Skew Control | FSTA pin selects 2.3 ns (FSTA = GND) or 2.8 ns (FSTA = VCC) SYSCLK-to-SSCLK delay - minimizes clock-data skew in source-synchronous mode |
| Edge Rate Control | ERC pin adjusts B-port rise/fall times (Fast: tr = 0.9 ns, tf = 2.3 ns; Slow: tr = 1.3 ns, tf = 2.7 ns) - optimizes signal integrity vs. data rate trade-off |
| Live Insertion | Ioff, power-up 3-state, and BIAS VCC - prevents backflow current and backplane disturbance during hot-plug |
Pinout & Package
TSSOP-64 (DGG) package with distributed VCC/GND pins to suppress high-speed switching noise; 1.2 mm max height, 12.6 mm × 17.1 mm footprint per JEDEC MO-153.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DIR | Direction control | Active-high sets A→B (L) or B→A (H) data flow direction |
| OE | Output enable | Active-low enables/disables all 18 A-port outputs simultaneously |
| CKOE | Clock output enable | Controls CLKOUT/SSCLK buffering and latched/transparent mode selection |
| CMS | Clock mode select | Selects system-synchronous (L) or clock-synchronous (H) operation |
| FSTA | Flexible setup time adjust | GND = fast clock-data alignment (2.3 ns); VCC = slow alignment (2.8 ns) |
| ERC | Edge-rate control | H = slow B-port edges (reduced EMI); L = fast edges (max data rate) |
| BIAS VCC | Backplane I/O precharge | Preconditions B-port before VCC ramp-up - enables true live insertion |
| VREF | B-port differential reference | Set to 1 V for GTLP - defines GTLP input threshold and noise margin |
Key Features
| Feature | Design Value |
|---|---|
| TI-OPC circuitry | Actively limits overshoot on unterminated or unevenly loaded backplanes - maintains signal integrity at >100 MHz |
| OEC circuitry | Reduces bus settling time and electromagnetic interference - improves noise margin in dense card cages |
| Bus-hold on A-port | Eliminates need for external pullup/pulldown resistors on unused LVTTL inputs - reduces BOM count and layout complexity |
| Distributed VCC/GND | Multiple power/ground pins minimize simultaneous switching noise - critical for stable 175 MHz operation |
| GTLP ac specs only | Guaranteed timing at GTLP levels (not GTL) - ensures reliable performance in high-noise telecom backplanes |
Applications
| Telecom Backplane Interface | High-Density Switching Fabric |
|---|---|
Use Scenario: Interfacing LVTTL-based line cards with GTLP-terminated central switch fabric backplanes in carrier-grade routers. IC Role / Device Role / Timing Role: Bidirectional level translator and clock buffer; provides SSCLK with <2.8 ns skew to B-port data for source-synchronous capture. Use Value: Enables 175 MHz sustained data throughput while maintaining <0.5 ns output-to-output skew across 18 bits - eliminates time-of-flight bottlenecks. | Use Scenario: Hot-pluggable module interconnect in modular Ethernet switches with distributed load backplanes. IC Role / Device Role / Timing Role: GTLP transceiver with live-insertion support (Ioff, BIAS VCC); ERC adjusts edge rates to match varying slot impedance. Use Value: Prevents backplane disturbance during card insertion/removal; ERC tuning allows optimal signal integrity across 20+ slot configurations. |
| Source-Synchronous Memory Interface | Industrial Control Backplane |
Use Scenario: Connecting LVTTL FPGA controller to GTLP DDR memory subsystem in test equipment with strict setup/hold windows. IC Role / Device Role / Timing Role: Clock-domain bridge; FSTA configures SYSCLK-to-SSCLK delay to meet FPGA capture timing at 175 MHz. Use Value: Achieves 1.1 ns setup time (A before SYSCLK↑) and 0.3 ns hold time (A after SYSCLK↑) - meets tight FPGA interface margins. | Use Scenario: Real-time I/O expansion chassis where PLC modules communicate over GTLP backplane with centralized LVTTL CPU. IC Role / Device Role / Timing Role: Robust bus transceiver with latch-up immunity (>100 mA per JESD 78 Class II) and 2000-V HBM ESD protection. Use Value: Ensures long-term reliability in electrically noisy factory environments; distributed VCC/GND suppresses ground bounce in multi-module systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74GTL16622DGGR | 16-bit, no SSCLK/FSTA; fixed GTL (not GTLP) interface; lower drive (64 mA) | Lacks source-synchronous clock generation and skew adjustment - unsuitable for >100 MHz source-sync systems | Select SN74GTLPH1627DGGR when SSCLK, FSTA, or 100 mA GTLP drive is required. |
| SN74GTLPH16912ZQLR | 18-bit, same GTLP family, but 56-pin BGA (ZQL) - no TSSOP option; identical FSTA/ERC/BIAS VCC features | Same electrical functionality but incompatible PCB footprint - requires redesign for space-constrained layouts | Choose SN74GTLPH1627DGGR for TSSOP-64 compatibility and established thermal profile in card-edge designs. |
Compared with SN74GTL16622DGGR, SN74GTLPH1627DGGR adds source-synchronous clocking and 56% higher GTLP drive for distributed backplanes; versus SN74GTLPH16912ZQLR, it offers drop-in TSSOP replacement without layout change - critical for legacy telecom hardware refresh.
Availability
SN74GTLPH1627DGGR is available at Aetrix Electronics and suitable for telecom backplane interfaces, high-density switching fabrics, source-synchronous memory subsystems, and industrial control backplanes requiring stable component supply and long-lifecycle support.
Supply support for SN74GTLPH1627DGGR 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The Widebus™ family - including SN74GTLPH1627DGGR - was engineered specifically for high-speed, noise-immune backplane interconnect in telecom infrastructure, emphasizing GTLP signal integrity, live insertion, and distributed-load timing compliance.
FAQ
What is the maximum supported clock frequency for SN74GTLPH1627DGGR?
The SN74GTLPH1627DGGR is fully specified for 175 MHz operation under GTLP conditions (VTT = 1.5 V, VREF = 1 V). This applies to both SYSCLK-driven A↔B data transfer and SSCLK generation. At 150 MHz, the device supports FSTA = VCC configuration for extended clock-data alignment - verified across –40°C to 85°C with 3.15 V–3.45 V VCC.
How does the FSTA pin affect timing in SN74GTLPH1627DGGR?
The FSTA pin on SN74GTLPH1627DGGR selects SYSCLK-to-SSCLK propagation delay: FSTA = GND yields 2.3 ns (fast mode), FSTA = VCC yields 2.8 ns (slow mode). This adjustment directly compensates for board-level clock skew, enabling precise setup/hold margin control in source-synchronous applications - confirmed in TI's SCES356C datasheet Figure 2.
Can SN74GTLPH1627DGGR be used in GTL (not GTLP) systems?
Yes, SN74GTLPH1627DGGR supports both GTL (VTT = 1.2 V, VREF = 0.8 V) and GTLP (VTT = 1.5 V, VREF = 1 V) signaling, as stated in its functional description. However, all AC specifications - including 175 MHz timing - are guaranteed only at GTLP levels; GTL operation requires validation of setup/hold margins per application.
What is the purpose of the BIAS VCC pin on SN74GTLPH1627DGGR?
The BIAS VCC pin on SN74GTLPH1627DGGR precharges B-port I/O lines before main VCC ramp-up, preventing transient disturbances on active backplane signals during live insertion. It operates at 3.3 V and must be powered before VCC - a requirement documented in TI's recommended operating conditions (Note 5, SCES356C).
Does SN74GTLPH1627DGGR support hot-swap without external circuitry?
Yes, SN74GTLPH1627DGGR integrates full live-insertion support: Ioff disables outputs at VCC = 0 V, power-up 3-state prevents bus conflict during power sequencing, and BIAS VCC enables safe B-port preconditioning. These features - validated per JESD78 Class II latch-up and 2000-V HBM ESD standards - eliminate need for external hot-swap controllers in compliant designs.
SN74GTLPH1627DGGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74GTLPH
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Translator Type:
- Mixed Signal
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 18
- Voltage - VCCA:
- -
- Voltage - VCCB:
- -
- Input Signal:
- LVTTL
- Output Signal:
- GTLP
- Output Type:
- Tri-State, Non-Inverted
- Data Rate:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-TFSOP (0.240", 6.10mm Width)
SN74GTLPH1627DGGR FAQ
1.How can I place an order for SN74GTLPH1627DGGR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74GTLPH1627DGGR 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 SN74GTLPH1627DGGR reliable?
The price and inventory of SN74GTLPH1627DGGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74GTLPH1627DGGR is usually 5 days.
3.What payment methods are accepted for SN74GTLPH1627DGGR?
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4.How is shipping managed for SN74GTLPH1627DGGR?
SN74GTLPH1627DGGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74GTLPH1627DGGR 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 SN74GTLPH1627DGGR?
For technical support, including SN74GTLPH1627DGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74GTLPH1627DGGR requirements.
6.How does Aetrix verify that SN74GTLPH1627DGGR is sourced from the original manufacturer or authorized distributors?
All SN74GTLPH1627DGGR 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 SN74GTLPH1627DGGR meets industry standards.
7.What is the process for return or replacement of SN74GTLPH1627DGGR?
All SN74GTLPH1627DGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74GTLPH1627DGGR, 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 SN74GTLPH1627DGGR part is unused and in its original packaging.
Return procedure for SN74GTLPH1627DGGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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