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Texas Instruments SN74GTLP1395DWG4
- Part No.:
- SN74GTLP1395DWG4
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74GTLP1395DWG4.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,024
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Product details
Overview
SN74GTLP1395DWG4 from Texas Instruments is a dual 1-bit LVTTL-to-GTLP bidirectional bus transceiver with split LVTTL port, adjustable edge-rate control (ERC), selectable polarity, and live-insertion support. It provides level translation between 3.3-V GTLP backplanes (VTT = 1.5 V) and 5-V-tolerant LVTTL logic (VCC = 3.15–3.45 V), delivering 100 mA GTLP drive and –24/24 mA LVTTL output capability for incident-wave switching in distributed backplane loads down to 11 Ω. It is designed for IEEE 1394 backplane physical-layer interfaces in industrial and telecom chassis systems.
For engineers reviewing the SN74GTLP1395DWG4 datasheet, SN74GTLP1395DWG4 pinout, SN74GTLP1395DWG4 application, or SN74GTLP1395DWG4 equivalent, key selection considerations include GTLP/LVTTL level translation integrity, ERC-controlled rise/fall times (1.0–2.6 ns), TI-OPC™/OEC™ signal integrity features, live-insertion behavior under Ioff/BIAS VCC, and dual independent 1-bit channel operation with feedback path.
Technical Context
This device implements two independent 1-bit transceivers, each with separate A (LVTTL input), B (GTLP I/O), and Y (LVTTL output) terminals, enabling true bidirectional data flow with polarity inversion via T/C control. Each channel supports isolated enable control (OEAB for B-port, OEBY for Y-port) and operates across GTLP (VTT = 1.5 V, VREF = 1 V) or GTL (VTT = 1.2 V, VREF = 0.8 V) signaling standards.
TI-OPC™ circuitry actively suppresses overshoot on unevenly loaded backplanes during low-to-high transitions, while OEC™ minimizes bus settling time. ERC input selects fast (ERC = L) or slow (ERC = H) edge rates, adjusting B-port tr/tf from 1.0/2.0 ns to 1.5/2.6 ns (RLC load) - directly optimizing signal integrity vs. timing margin trade-offs in multi-slot backplane topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 3.15 V to 3.45 V - ensures stable operation with standard 3.3-V ±4.5% supply rails |
| GTLP Output Drive | 100 mA sink - enables incident-wave switching into heavily loaded backplanes (Z₀ ≈ 11 Ω) |
| LVTTL I/O Drive | –24 mA / 24 mA - compatible with TTL and 5-V CMOS logic while maintaining 3.3-V core compatibility |
| Propagation Delay (A→B) | 3.4–6.3 ns (fast/slow ERC) - supports 100-Mbps IEEE 1394 backplane data rates with timing margin |
| Edge-Rate Control | ERC input selects B-port tr/tf - 1.0/2.0 ns (fast) or 1.5/2.6 ns (slow) under RLC load - tunes signal integrity per backplane impedance profile |
| Live-Insertion Support | Ioff < 10 µA at VCC = 0 V, BIAS VCC precharge - prevents current backflow and backplane disturbance during hot-plug events |
| Input Voltage Tolerance | A-port and control inputs rated to 5.5 V - allows direct interfacing with legacy 5-V logic without level shifters |
Pinout & Package
SN74GTLP1395DWG4 is housed in a 20-pin SOIC (DW) package with 0.300-inch body width and standard gull-wing lead form. Pin assignments are validated per TI SCES349C datasheet Figure 1 (DW top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1Y, 3Y | LVTTL output (feedback path) | Provides diagnostic visibility into B-port data; independently enabled by OEBY |
| 1A, 2A, 1B, 2B | LVTTL input / GTLP I/O | Split A/B ports enable transparent/inverted bidirectional data flow with dedicated feedback |
| 1OEAB, 2OEAB | B-port output-enable (active-low) | Controls GTLP driver state; high = high-Z, low = active - critical for bus arbitration |
| 1OEBY, 2OEBY | Y-port output-enable (active-low) | Enables/disables LVTTL feedback outputs independently of B-port activity |
| 1T/C, 2T/C | Polarity select (true/complement) | Configures data direction: high = A→B/Y pass-through, low = inverted A→B/Y transmission |
| ERC | Edge-rate control input | High = slow edges (2.4/3.0 ns), low = fast edges (1.3/2.7 ns) - tunes signal integrity vs. EMI/noise margin |
| VREF | GTLP differential input reference | Set to 1 V for GTLP mode; establishes noise margin threshold for B-port receivers |
| BIAS VCC | Backplane I/O precharge supply | Preconditions B-port pins during card insertion to prevent data corruption on live backplanes |
| GND (pins 4,8,13,17) | Ground reference | Four dedicated GND pins reduce ground bounce and improve noise immunity in high-speed backplane routing |
| VCC (pin 6) | Core supply | 3.3-V logic supply powering LVTTL interface and control logic; powers internal bias networks |
Key Features
| Feature | Design Value |
|---|---|
| TI-OPC™ Overshoot Control | Actively limits overshoot on unevenly terminated backplanes, preserving noise margin at >100 Mbps |
| OEC™ Signal Integrity Enhancement | Reduces electromagnetic interference and improves bus settling time across distributed loads |
| Adjustable Edge-Rate Control (ERC) | Hardware-selectable fast/slow B-port edges - enables system-level optimization of timing vs. signal integrity |
| Split LVTTL Port with Feedback Path | Dedicated A-input and Y-output per channel - supports real-time diagnostics and control loop monitoring |
| 5-V-Tolerant LVTTL I/O | Accepts 0–5.5 V inputs while operating from 3.3-V supply - eliminates external level shifters for mixed-voltage systems |
| Live-Insertion Circuitry | Ioff, power-up 3-state, and BIAS VCC collectively enable hot-plug capability without backplane disturbance |
Applications
| IEEE 1394 Backplane PHY Interface | High-Speed Industrial Chassis Diagnostics |
|---|---|
Use Scenario: Interfacing TI TSB14AA1 or similar 1394 backplane PHY controllers to parallel backplanes in telecom or server chassis. IC Role / Device Role / Timing Role: Translates 3.3-V GTLP strobe/data signals between PHY and LVTTL host controller; provides feedback path for link status monitoring. Use Value: Enables full 100-Mbps 1394 backplane operation with TI-OPC™-enhanced signal integrity and ERC-tuned edge rates for varying slot loading. |
Use Scenario: Real-time monitoring of power supply health, fan speed, and thermal sensors across multi-slot industrial backplanes. IC Role / Device Role / Timing Role: Provides isolated, polarity-selectable 1-bit channels for sensor data and control signals; BIAS VCC ensures glitch-free insertion. Use Value: Supports live-insertion diagnostics without interrupting main data buses - critical for uptime-sensitive factory automation systems. |
| Redundant Clock Distribution | ATM Read/Write Clock Buffering |
Use Scenario: Distributing primary and secondary clocks across daughter cards in fault-tolerant computing systems. IC Role / Device Role / Timing Role: Bidirectional clock buffer with selectable polarity - delivers matched skew (<0.4 ns) and adjustable edge rates for jitter reduction. Use Value: Maintains sub-nanosecond clock alignment across slots while allowing ERC tuning to minimize crosstalk-induced jitter. |
Use Scenario: Isolating and buffering ATM cell read/write strobes in network line cards with strict timing budgets. IC Role / Device Role / Timing Role: High-drive GTLP transceiver handling 50–100 Mbps strobe signals; OEC™ reduces EMI in dense PCB layouts. Use Value: Delivers 24 mA LVTTL drive and 100 mA GTLP drive to meet setup/hold requirements across long backplane traces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74GTLP1394DW | Single-channel version; lacks second independent transceiver and split feedback path | Suitable only for single-bit applications; cannot support concurrent data + strobe routing like SN74GTLP1395DWG4 | Select when space or cost constraints eliminate need for dual independent channels |
| SN74GTLP1396DW | Includes integrated VREF generator; no external VREF required; same pinout but different internal biasing | Reduces external component count but requires validation of VREF stability under dynamic load conditions | Choose when minimizing BOM count is prioritized over maximum flexibility in VREF adjustment |
Compared with SN74GTLP1394DW and SN74GTLP1396DW, SN74GTLP1395DWG4 uniquely supports dual independent 1-bit channels with dedicated feedback paths and externally adjustable VREF - essential for IEEE 1394 PHY interfaces requiring simultaneous data/strobe isolation and diagnostics visibility.
Availability
SN74GTLP1395DWG4 is available at Aetrix Electronics and suitable for IEEE 1394 backplane interfaces, industrial chassis diagnostics, and redundant clock distribution requiring stable component supply across extended product lifecycles.
Supply support for SN74GTLP1395DWG4 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 connectivity technologies with over 50 years of innovation in high-speed interface solutions.
SN74GTLP1395DWG4 belongs to TI's GTLP family of backplane transceivers, engineered specifically for robust signal integrity in multi-slot 1394, VME, and proprietary parallel backplane systems operating up to 100 Mbps.
FAQ
What is the function of the ERC pin on the SN74GTLP1395DWG4?
The ERC (Edge-Rate Control) pin on the SN74GTLP1395DWG4 selects between fast and slow GTLP output edge rates: ERC = L yields 1.0 ns rise / 2.0 ns fall time (RLC load), while ERC = H yields 1.5 ns rise / 2.6 ns fall time. This hardware-selectable feature allows system designers to optimize signal integrity versus timing margin based on actual backplane impedance and stub length - a critical capability for reliable 100-Mbps operation in variable-load environments. The SN74GTLP1395DWG4 datasheet specifies these values under SCES349C Section 8.
Does the SN74GTLP1395DWG4 support live insertion, and how is it implemented?
Yes, the SN74GTLP1395DWG4 supports live insertion via three integrated features: Ioff circuitry disables outputs when VCC = 0 V (Ioff < 10 µA), power-up 3-state holds B/Y outputs in high-Z during VCC ramp (0–1.5 V), and BIAS VCC precharges GTLP I/O pins before VCC is applied. These functions collectively prevent current backflow, bus conflicts, and data corruption during hot-plug events - validated per TI's hot-insertion specifications in SCES349C Section 7. This makes SN74GTLP1395DWG4 suitable for telecom and server chassis requiring zero-downtime card replacement.
How does the split LVTTL port (A and Y) enhance system diagnostics in the SN74GTLP1395DWG4?
The split LVTTL port in the SN74GTLP1395DWG4 separates the A-input (LVTTL data source) from the Y-output (LVTTL feedback), enabling real-time observation of transmitted data without disrupting the GTLP B-port bus. Each channel has independent OEBY control, allowing selective monitoring of active or idle lanes. This architecture supports closed-loop diagnostics in IEEE 1394 PHY interfaces - for example, verifying strobe/data alignment or detecting link-layer errors - while maintaining full bandwidth on the GTLP backplane. The SN74GTLP1395DWG4 functional description confirms this feedback path is central to its control and diagnostics role.
What are the voltage requirements for GTLP operation of the SN74GTLP1395DWG4?
For GTLP operation, the SN74GTLP1395DWG4 requires VCC = 3.15–3.45 V, VTT = 1.35–1.65 V (termination voltage), and VREF = 0.87–1.1 V (differential input reference). VREF is typically set to 1 V, matching two-thirds of VTT. These values are specified in the "Recommended Operating Conditions" table (Section 6) of SCES349C. Operation at GTL levels (VTT = 1.2 V, VREF = 0.8 V) is also supported, but all AC performance data in the datasheet is guaranteed only for GTLP conditions.
Can the SN74GTLP1395DWG4 interface directly with 5-V TTL logic?
Yes, the SN74GTLP1395DWG4's LVTTL inputs (A-port and control pins) are 5-V tolerant, accepting VI up to 5.5 V while powered from a 3.3-V VCC supply. This eliminates the need for external level shifters when interfacing with legacy 5-V TTL or CMOS devices - confirmed in the "Absolute Maximum Ratings" (Section 5) and "Recommended Operating Conditions" (Section 6) of SCES349C. However, the GTLP B-port operates at 1.5-V signaling and must be terminated to VTT = 1.5 V; direct connection to 5-V logic is not supported on that side.
SN74GTLP1395DWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74GTLP
- Package/Case:
- Packaging:
- Tube
- Product Status:
- Obsolete
- Translator Type:
- Mixed Signal
- Channel Type:
- Bidirectional
- Number of Circuits:
- 2
- Channels per Circuit:
- 1
- 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:
- 20-SOIC (0.295", 7.50mm Width)
SN74GTLP1395DWG4 FAQ
1.How can I place an order for SN74GTLP1395DWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74GTLP1395DWG4 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 SN74GTLP1395DWG4 reliable?
The price and inventory of SN74GTLP1395DWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74GTLP1395DWG4 is usually 5 days.
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4.How is shipping managed for SN74GTLP1395DWG4?
SN74GTLP1395DWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74GTLP1395DWG4 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 SN74GTLP1395DWG4?
For technical support, including SN74GTLP1395DWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74GTLP1395DWG4 requirements.
6.How does Aetrix verify that SN74GTLP1395DWG4 is sourced from the original manufacturer or authorized distributors?
All SN74GTLP1395DWG4 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 SN74GTLP1395DWG4 meets industry standards.
7.What is the process for return or replacement of SN74GTLP1395DWG4?
All SN74GTLP1395DWG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74GTLP1395DWG4, 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 SN74GTLP1395DWG4 part is unused and in its original packaging.
Return procedure for SN74GTLP1395DWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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