My Inquiry
My Account
Texas Instruments 74GTLP1394DGVRG4
- Part No.:
- 74GTLP1394DGVRG4
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
74GTLP1394DGVRG4.pdf
- Description:
- IC TRANSLATOR BIDIR 16TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,994
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74GTLP1394DGVRG4 from Texas Instruments is a 2-bit LVTTL-to-GTLP adjustable-edge-rate bus transceiver with split LVTTL port, feedback path, and selectable polarity. It provides bidirectional level translation between 3.3-V LVTTL logic (5-V tolerant) and 1.5-V GTLP backplane signals, supports live insertion via Ioff, power-up 3-state, and BIAS VCC, and delivers 100 mA GTLP output drive for incident-wave switching on heavily loaded backplanes down to 11 Ω. It is used in IEEE 1394 backplane physical-layer interfaces for diagnostics and system enhancement in VME, CPCI, and FB+ systems.
For engineers reviewing the 74GTLP1394DGVRG4 datasheet, 74GTLP1394DGVRG4 pinout, 74GTLP1394DGVRG4 application, or 74GTLP1394DGVRG4 equivalent, this device enables robust hot-pluggable 25/50/100 Mbps 1394 backplane connectivity with adjustable edge-rate control, true/complementary data modes, and split-port feedback for real-time diagnostics monitoring in industrial embedded backplane cards.
Technical Context
The 74GTLP1394DGVRG4 implements dual-directional signal translation using separate A-port (LVTTL), B-port (GTLP), and Y-port (LVTTL feedback) terminals. Its TI-OPC circuitry actively limits overshoot on unevenly terminated backplanes, while OEC circuitry improves signal integrity and reduces EMI during high-speed transitions.
It features three independent enable controls: OEAB for B-port output activation, OEBY for Y-port output activation, and T/C for polarity selection (true vs. complementary mode). ERC input adjusts B-port rise/fall times between slow (2.7 ns tr, 3.2 ns tf) and fast (1.5 ns tr, 2.1 ns tf) edge rates to optimize data-transfer rate versus signal integrity across distributed RLC backplane loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | VCC = 3.15–3.45 V; ensures stable operation within industrial 3.3-V rail tolerances |
| GTLP Output Drive | 100 mA sink per B-port; enables incident-wave switching on backplanes with ≤11 Ω equivalent load impedance |
| LVTTL Output Drive | –24 mA / 24 mA; compatible with standard 3.3-V LVTTL receivers and 5-V tolerant inputs |
| Propagation Delay (A→B) | Typ. 3.6 ns (fast edge); supports 100 Mbps 1394 backplane timing with margin |
| Edge-Rate Control | ERC pin selects slow (GND) or fast (VCC) B-port edges; allows tuning for specific backplane trace length and termination |
| Live Insertion Support | Ioff <10 µA at VCC = 0 V; prevents backflow current during card hot-plug; BIAS VCC precharges B-port I/O |
| Input Threshold (B port) | VREF = 1 V (GTLP); sets differential input reference for noise-immune GTLP signal detection |
Pinout & Package
74GTLP1394DGVRG4 is packaged in TVSOP (DGV) - 24-pin, 0.5-mm pitch, 4.4 mm × 7.9 mm body, 1.2 mm max height - optimized for high-density backplane card layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 7, 11, 13, 15 | GND | Seven ground connections ensure low-impedance return paths for high-speed GTLP/LVTTL switching |
| 2, 4 | B1, B2 | GTLP-level bidirectional data/strobe outputs; connect directly to backplane traces |
| 6, 8 | A1, A2 | LVTTL-level inputs from PHY controller; 5-V tolerant, interface with TSB14AA1 link-layer signals |
| 9 | VCC | Main 3.3-V supply for internal logic and LVTTL I/O; decoupling required near pin |
| 10 | VREF | GTLP differential input reference voltage (1 V); sets noise margin for B-port receivers |
| 12, 14 | Y1, Y2 | LVTTL-level feedback outputs; relay backplane data/strobe to diagnostic monitoring circuits |
| 16, 18, 20 | OEAB, OEBY, T/C | Independent enables and polarity control: OEAB gates B-port, OEBY gates Y-port, T/C selects true/inverted mode |
| 17, 19, 21, 23 | ERC, BIAS VCC, GND, GND | ERC sets edge rate; BIAS VCC enables live-insertion precharge; two dedicated GNDs support analog-sensitive biasing |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Edge-Rate Control (ERC) | Two discrete edge-rate settings (slow/fast) via single pin; eliminates need for external RC networks or layout changes |
| Split LVTTL Port with Feedback Path | Dedicated A-input and Y-output pins per bit; enables real-time backplane signal monitoring without interrupting host PHY operation |
| TI-OPC Overshoot Control Circuitry | Actively clamps overshoot on unterminated or unevenly loaded backplanes; maintains signal integrity at >50 MHz |
| OEC Signal Integrity Enhancement | Reduces ringing and EMI through optimized output stage design; validated across multiple RLC backplane models |
| Live Insertion Support | Full Ioff, power-up 3-state, and BIAS VCC implementation; permits safe hot-plug into active 1394 backplanes without data loss |
| Selectable Polarity (T/C) | Single-pin polarity inversion for both A→B and B→Y paths; simplifies integration with PHYs requiring inverted strobe/data pairs |
Applications
| IEEE 1394 Backplane Diagnostics | Hot-Pluggable VME/CPCI Card Interface |
|---|---|
Use Scenario: Real-time monitoring of backplane data and strobe signals during system bring-up and field maintenance. IC Role / Device Role / Timing Role: Translates TSB14AA1 PHY outputs to LVTTL for on-card FPGA or microcontroller diagnostics logic. Use Value: Enables non-intrusive visibility into live 1394 backplane traffic without disrupting primary data flow or requiring external probes. |
Use Scenario: Adding IEEE 1394 serial bus capability to legacy VME or CompactPCI carrier cards supporting live card replacement. IC Role / Device Role / Timing Role: Bridges LVTTL host interface to GTLP backplane, providing 25/50/100 Mbps control channel with live-insertion safety. Use Value: Delivers plug-and-play 1394 connectivity with zero downtime during card swaps-critical for telecom and industrial control systems. |
| GTLP-Based System Enhancement Bus | Peripheral Monitoring Interface |
Use Scenario: Implementing auxiliary 2-bit CSR (Configuration and Status Register) access bus alongside main parallel backplane (e.g., FutureBus+). IC Role / Device Role / Timing Role: Provides isolated, low-latency LVTTL↔GTLP path for configuration reads/writes to daughter-card peripherals. Use Value: Offloads management traffic from primary bus, reducing arbitration overhead and enabling deterministic CSR response times. |
Use Scenario: Monitoring fan speed, power supply status, and disk health via shared 1394 backplane in IPMI-compliant server chassis. IC Role / Device Role / Timing Role: Acts as physical-layer translator between IPMI controller (LVTTL) and 1394 backplane (GTLP) for sensor telemetry. Use Value: Leverages existing 1394 infrastructure for out-of-band monitoring-no additional cabling or dedicated management buses required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74GTLP1394DR | SOIC-24 package (D); higher θJA = 73°C/W; no BIAS VCC pin; requires external precharge for live insertion | Suitable for fixed-mount, non-hot-plug applications where thermal headroom is available and board space permits larger footprint | Choose when cost sensitivity outweighs live-insertion requirement and SOIC assembly is preferred. |
| SN74GTLP1394PWR | TSSOP-24 package (PW); θJA = 108°C/W; same pinout and electrical specs; lacks dedicated BIAS VCC pin | Used in space-constrained designs where TVSOP density is insufficient but thermal performance is acceptable | Prefer when PCB real estate is tighter than thermal budget, and live insertion is managed externally. |
Compared with SN74GTLP1394DR and SN74GTLP1394PWR, the 74GTLP1394DGVRG4 offers integrated BIAS VCC and optimized thermal resistance (θJA = 120°C/W) for reliable live-insertion in high-density TVSOP layouts-making it the only variant fully supporting TI's recommended hot-plug sequence without external components.
Availability
74GTLP1394DGVRG4 is available at Aetrix Electronics and suitable for IEEE 1394 backplane diagnostics, hot-pluggable VME/CPCI card interfaces, and GTLP-based system enhancement buses requiring stable component supply across extended industrial temperature ranges (–40°C to 85°C).
Supply support for 74GTLP1394DGVRG4 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 over 50 years of innovation in high-speed interface ICs.
The SN74GTLP1394 product line was designed specifically to enable robust, hot-pluggable IEEE 1394 backplane connectivity in industrial and telecom systems-bridging LVTTL controllers to GTLP backplanes with signal integrity and live-insertion assurance.
FAQ
What is the primary function of the 74GTLP1394DGVRG4 in a 1394 backplane system?
The 74GTLP1394DGVRG4 serves as a bidirectional LVTTL-to-GTLP bus transceiver that translates signals between a 3.3-V LVTTL link-layer controller (e.g., TSB14AA1) and a 1.5-V GTLP backplane. It enables 25/50/100 Mbps IEEE 1394 communication with live insertion support, split-port feedback for diagnostics, and adjustable edge-rate control-making it essential for robust backplane interconnect in VME, CPCI, and FB+ systems.
How does the ERC pin affect timing performance of the 74GTLP1394DGVRG4?
The ERC pin on the 74GTLP1394DGVRG4 selects between two discrete edge-rate modes: ERC = GND yields slow edges (tr = 2.7 ns, tf = 3.2 ns), while ERC = VCC enables fast edges (tr = 1.5 ns, tf = 2.1 ns). This adjustment directly impacts propagation delay (e.g., A→B tPHL drops from 4.2 ns to 3.6 ns) and signal integrity on distributed RLC backplane loads-allowing designers to balance data rate and overshoot mitigation.
Can the 74GTLP1394DGVRG4 be used without connecting BIAS VCC?
No-the 74GTLP1394DGVRG4 requires BIAS VCC to be connected to 3.3 V for full live-insertion capability. BIAS VCC precharges B-port I/O lines during card insertion to prevent disturbance of active backplane signals. If BIAS VCC is unconnected or grounded, the device loses its certified hot-plug functionality and may cause data corruption or bus contention during insertion.
What is the role of the split LVTTL port (A and Y pins) in the 74GTLP1394DGVRG4?
The split LVTTL port separates input (A1/A2) and output (Y1/Y2) functions to provide a dedicated feedback path. A1/A2 receive data/strobe from the PHY controller, while Y1/Y2 retransmit those signals in LVTTL format for on-card monitoring or diagnostic logic-enabling real-time visibility into backplane activity without interfering with the primary A↔B data path or requiring additional buffers.
Does the 74GTLP1394DGVRG4 support both GTL and GTLP signaling standards?
Yes-the 74GTLP1394DGVRG4 supports both GTL (VTT = 1.2 V, VREF = 0.8 V) and GTLP (VTT = 1.5 V, VREF = 1.0 V) signal levels. Its AC specifications are guaranteed only for GTLP, but DC parameters allow interoperability with GTL systems. Designers must configure VREF and VTT accordingly and verify noise margins, especially when operating at the lower GTL voltage thresholds.
74GTLP1394DGVRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74GTLP
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Translator Type:
- Mixed Signal
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 2
- Voltage - VCCA:
- -
- Voltage - VCCB:
- -
- Input Signal:
- LVTTL
- Output Signal:
- GTLP
- Output Type:
- Tri-State, Inverted
- Data Rate:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TFSOP (0.173", 4.40mm Width)
74GTLP1394DGVRG4 FAQ
1.How can I place an order for 74GTLP1394DGVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74GTLP1394DGVRG4 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 74GTLP1394DGVRG4 reliable?
The price and inventory of 74GTLP1394DGVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74GTLP1394DGVRG4 is usually 5 days.
3.What payment methods are accepted for 74GTLP1394DGVRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74GTLP1394DGVRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74GTLP1394DGVRG4?
74GTLP1394DGVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74GTLP1394DGVRG4 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 74GTLP1394DGVRG4?
For technical support, including 74GTLP1394DGVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74GTLP1394DGVRG4 requirements.
6.How does Aetrix verify that 74GTLP1394DGVRG4 is sourced from the original manufacturer or authorized distributors?
All 74GTLP1394DGVRG4 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 74GTLP1394DGVRG4 meets industry standards.
7.What is the process for return or replacement of 74GTLP1394DGVRG4?
All 74GTLP1394DGVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74GTLP1394DGVRG4, 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 74GTLP1394DGVRG4 part is unused and in its original packaging.
Return procedure for 74GTLP1394DGVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74GTLP1394DGVRG4 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…
