My Inquiry
My Account
Texas Instruments SN74GTLPH16927GR
- Part No.:
- SN74GTLPH16927GR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74GTLPH16927GR.pdf
- Description:
- IC TRANSLATOR BIDIR 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,719
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74GTLPH16927GR from Texas Instruments is an 18-bit LVTTL-to-GTLP bus transceiver with source-synchronous clock outputs, supporting bidirectional level translation between 3.3-V LVTTL logic and 1.5-V GTLP backplane signaling. It features flexible clock-mode selection (CMS), adjustable clock-data skew via FSTA, and medium-drive GTLP outputs (50 mA). It enables high-speed data transfer in distributed-load backplanes for telecom switching cards and modular computing systems.
For engineers reviewing the SN74GTLPH16927GR datasheet, SN74GTLPH16927GR pinout, SN74GTLPH16927GR application, or SN74GTLPH16927GR equivalent, key selection considerations include GTLP/LVTTL interface compatibility, live-insertion support (Ioff, BIAS VCC, power-up 3-state), source-synchronous timing control (FSTA, CMS, CKOE), and TSSOP-56 package constraints for backplane card layout.
Technical Context
The SN74GTLPH16927GR integrates dual-path D-type latches and flip-flops to support transparent or latched data flow in both A-to-B (LVTTL→GTLP) and B-to-A (GTLP→LVTTL) directions. Its TI-OPC™ circuitry actively limits overshoot on unevenly terminated backplanes, while OEC™ improves signal integrity and reduces EMI.
It provides three clock paths: SYSCLK input (LVTTL), SSCLK output (GTLP), and CLKOUT output (LVTTL), all synchronized via CMS and CKOE controls. The FSTA input adjusts setup time between clock and data edges to minimize skew-critical for >175 MHz source-synchronous operation across distributed loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 18-bit bidirectional LVTTL-to-GTLP bus transceiver with source-synchronous clock generation |
| Supply Voltage (VCC) | 3.15 V to 3.45 V - ensures stable operation across industrial temperature range (–40°C to 85°C) |
| GTLP Drive Strength | 50 mA sink per B-port output - supports incident-wave switching into backplane loads as low as 11 Ω |
| Max Clock Frequency | 175 MHz - validated for lumped and distributed RLC backplane models per TI SPICE simulation |
| Output Skew (tsk(t)) | 1.3 ns max - guarantees tight timing alignment between GTLP data and SSCLK outputs |
| FSTA Adjustment Range | Configurable fast/slow delay mode - enables precise clock-data setup tuning for system-level skew compensation |
| Live-Insertion Support | Ioff, power-up 3-state, and BIAS VCC - prevents current backflow and bus disturbance during hot-plug events |
Pinout & Package
TSSOP-56 (DGG) package with 0.5-mm pitch, 12.5-mm × 6.1-mm body, and exposed thermal pad; optimized for low-noise routing with distributed VCC/GND pins and controlled impedance trace planning.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DIR | Direction control input | Active-high signal selecting A-to-B (LVTTL→GTLP) or B-to-A (GTLP→LVTTL) data flow path |
| OE | Output enable input | Active-low control enabling/disabling all 18 A-port outputs simultaneously |
| CKOE | Clock output enable | Controls CLKOUT/SSCLK buffering and selects latched vs. transparent data mode |
| CMS | Clock mode select | Switches between system-synchronous (SYSCLK-driven) and clock-synchronous (SSCLK-driven) operation |
| FSTA | Flexible setup-time adjustment | Selects fast/slow internal delay to calibrate clock-to-data setup time for skew minimization |
| BIAS VCC | B-port precharge supply | Preconditions GTLP I/O before VCC ramp-up to prevent backplane disturbance during live insertion |
| VREF | B-port differential reference | 1.0 V nominal reference for GTLP receiver threshold - sets noise margin and must track VTT within ±0.6 V |
| SSCLK | Source-synchronous GTLP clock output | Buffered GTLP-level copy of SYSCLK - routed with matched length to B-port data for skew-critical applications |
| CLKOUT | LVTTL clock output | Buffered LVTTL-level SYSCLK or SSCLK - used for local timing or synchronization of A-side logic |
| SYSCLK | System clock input | LVTTL-compatible clock input driving both CLKOUT and SSCLK paths; required for all synchronous modes |
Key Features
| Feature | Design Value |
|---|---|
| TI-OPC™ overshoot control | Actively clamps low-to-high transitions on unterminated or unevenly loaded backplanes - maintains signal integrity without external termination |
| OEC™ output circuitry | Reduces bus settling time and EMI by optimizing edge rates and output impedance matching for GTLP loads |
| Bus-hold on A-port inputs | Eliminates need for external pullup/pulldown resistors on undriven LVTTL data lines - prevents floating inputs and logic glitches |
| Distributed VCC/GND pins | Minimizes simultaneous switching noise (SSN) in high-speed backplane interfaces - improves power integrity at >100 MHz |
| 5-V tolerant LVTTL I/O | Allows direct interfacing with legacy 5-V TTL/CMOS logic without level-shifting - simplifies mixed-voltage board design |
Applications
| Telecom Line Cards | Modular Server Backplanes |
|---|---|
|
Use Scenario: High-density line cards in carrier-grade switches require reliable hot-swappable GTLP communication with central fabric modules. IC Role / Device Role / Timing Role: SN74GTLPH16927GR serves as the primary LVTTL-to-GTLP bridge, providing source-synchronous clocking (SSCLK + FSTA) and live-insertion protection (BIAS VCC, Ioff). Use Value: Enables 175 MHz data throughput with <1.3 ns output skew, eliminating time-of-flight bottlenecks and supporting deterministic latency in packet-forwarding pipelines. |
Use Scenario: Multi-slot server chassis use GTLP backplanes to interconnect CPU, memory, and I/O modules operating at different voltage domains. IC Role / Device Role / Timing Role: SN74GTLPH16927GR translates between 3.3-V LVTTL control logic and 1.5-V GTLP data lanes while generating synchronized SSCLK for DDR-like timing margins. Use Value: Medium-drive (50 mA) GTLP outputs drive heavily loaded backplanes (Zeq ≥ 11 Ω), reducing need for point-of-load termination and lowering overall BOM cost. |
| Industrial PLC Backplanes | Test Equipment Modular Interfaces |
|
Use Scenario: Programmable logic controller racks use hot-pluggable I/O modules requiring robust signal integrity under electromagnetic noise and vibration. IC Role / Device Role / Timing Role: SN74GTLPH16927GR acts as a fault-tolerant transceiver with TI-OPC™ limiting ringing and OEC™ suppressing EMI during field wiring changes. Use Value: Live-insertion features (power-up 3-state, BIAS VCC) prevent bus contention during module replacement - critical for zero-downtime maintenance. |
Use Scenario: Automated test equipment uses modular instrument slots where GTLP backplanes carry high-speed digital stimulus and response data. IC Role / Device Role / Timing Role: SN74GTLPH16927GR interfaces FPGA-based pattern generators (LVTTL) with GTLP bus analyzers, using FSTA to align clock/data for jitter-sensitive measurements. Use Value: Adjustable FSTA setting compensates for PCB trace length mismatches, ensuring setup/hold compliance at 175 MHz without custom layout iteration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74GTLPH16923GR | 16-bit version (vs. 18-bit); identical GTLP drive, FSTA, and live-insertion features | Suitable for narrower data buses; lacks two B-port channels and associated control pins (B17/B18, CMS) | Select when 16-bit width suffices and board space or cost optimization is prioritized over channel count |
| SN74GTL16622DGGR | No FSTA or CMS; fixed clock mode; lower drive (24 mA GTLP); no BIAS VCC or live-insertion support | Designed for static GTLP backplanes without source-synchronous timing or hot-swap requirements | Choose only for non-critical, fixed-configuration systems where skew control and live insertion are unnecessary |
Compared with SN74GTLPH16923GR and SN74GTL16622DGGR, the SN74GTLPH16927GR uniquely delivers 18-bit width, programmable clock-data skew tuning (FSTA), and full live-insertion capability - making it the only option for high-reliability, source-synchronous modular systems requiring hot-swap and deterministic timing.
Availability
SN74GTLPH16927GR is available at Aetrix Electronics and suitable for telecom line cards, modular server backplanes, and industrial PLC chassis requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74GTLPH16927GR 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, with decades of expertise in high-speed interface ICs and backplane technologies.
The SN74GTLPH16927GR belongs to TI's Widebus™ family, engineered specifically for GTLP-based modular systems demanding source-synchronous timing, live insertion, and robust signal integrity across electrically challenging backplanes.
FAQ
What is the maximum supported clock frequency for SN74GTLPH16927GR?
The SN74GTLPH16927GR is fully characterized for operation up to 175 MHz in both lumped and distributed RLC backplane models. This rating applies to SYSCLK input and resulting SSCLK/CLKOUT outputs under recommended conditions (VCC = 3.15–3.45 V, VTT = 1.5 V, VREF = 1.0 V, TA = –40°C to 85°C). Timing margins assume proper PCB layout with matched trace lengths for source-synchronous paths.
How does the FSTA pin affect timing in SN74GTLPH16927GR?
The FSTA pin on the SN74GTLPH16927GR selects between fast and slow internal delay modes to adjust the setup time between SYSCLK/SSCLK and corresponding data outputs. In fast mode, clock-to-data skew is minimized for tighter timing budgets; in slow mode, additional margin is added to accommodate longer trace delays or process variation - enabling system-level skew calibration without hardware changes.
Can SN74GTLPH16927GR interface with 5-V TTL logic?
Yes, the A-port data inputs, control inputs (DIR, OE, CMS, CKOE, FSTA), and CLKOUT output of the SN74GTLPH16927GR are 5-V tolerant. They accept input voltages up to 5.5 V and operate reliably with standard TTL and 5-V CMOS logic families - allowing seamless integration with legacy controllers without external level shifters.
What package type is used for SN74GTLPH16927GR?
The SN74GTLPH16927GR uses a 56-pin TSSOP package (package code DGG), measuring 12.5 mm × 6.1 mm with 0.5-mm lead pitch. It features exposed thermal pad construction and is RoHS-compliant with green (Pb-free, Sb/Br-free) finish and JEDEC Level-1 moisture sensitivity rating.
Does SN74GTLPH16927GR support hot-plug insertion?
Yes, the SN74GTLPH16927GR fully supports live insertion via three integrated features: Ioff circuitry disables outputs when VCC = 0 V, power-up 3-state holds outputs high-impedance during power ramp, and BIAS VCC precharges GTLP I/O before VCC application - collectively preventing bus conflicts, current backflow, and signal disturbance during card insertion or removal.
SN74GTLPH16927GR 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:
- 56-TFSOP (0.240", 6.10mm Width)
SN74GTLPH16927GR FAQ
1.How can I place an order for SN74GTLPH16927GR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74GTLPH16927GR 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 SN74GTLPH16927GR reliable?
The price and inventory of SN74GTLPH16927GR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74GTLPH16927GR is usually 5 days.
3.What payment methods are accepted for SN74GTLPH16927GR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74GTLPH16927GR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74GTLPH16927GR?
SN74GTLPH16927GR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74GTLPH16927GR 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 SN74GTLPH16927GR?
For technical support, including SN74GTLPH16927GR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74GTLPH16927GR requirements.
6.How does Aetrix verify that SN74GTLPH16927GR is sourced from the original manufacturer or authorized distributors?
All SN74GTLPH16927GR 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 SN74GTLPH16927GR meets industry standards.
7.What is the process for return or replacement of SN74GTLPH16927GR?
All SN74GTLPH16927GR units undergo pre-shipment inspection (PSI). If there is an issue with SN74GTLPH16927GR, 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 SN74GTLPH16927GR part is unused and in its original packaging.
Return procedure for SN74GTLPH16927GR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74GTLPH16927GR Tags
-
74LVC1T45GW,125
Nexperia USA Inc.
-
74LVCH2T45DC,125
Nexperia USA Inc.
-
SN74LVC1T45DBVR
Texas Instruments
-
SN74LVC1T45DRLR
Texas Instruments
-
SN74LVC1T45DPKR
Texas Instruments
-
SN74LVC2T45DCTR
Texas Instruments
-
74LVC2T45GT,115
Nexperia USA Inc.
-
SN74LVC1T45YZPR
Texas Instruments
-
LSF0102DCUR
Texas Instruments
-
SN74LVC1T45DCKR
Texas Instruments
-
TXS0102DCTR
Texas Instruments
-
FXLP34P5X
onsemi
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
