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Home > Products > Integrated Circuits (ICs) > Logic > Translators, Level Shifters

Texas Instruments SN74GTLP1395DW

Name: SN74GTLP1395DW
Brand: Texas Instruments
SKU: SN74GTLP1395DW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74GTLP1395DW

Manufacturer:: Texas Instruments

Category:: Translators, Level Shifters

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Datasheet:: SN74GTLP1395DW.pdf

Description:: IC TRANSLTR BIDIRECTIONAL 20SOIC

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Product details

Overview

SN74GTLP1395DW 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 feedback path for diagnostics. It provides high-drive GTLP outputs (100 mA), 5-V-tolerant LVTTL I/O, and supports live insertion via Ioff, power-up 3-state, and BIAS VCC. Designed for IEEE 1394 backplane systems interfacing LVTTL logic cards to GTLP backplanes.

For engineers reviewing the SN74GTLP1395DW datasheet, SN74GTLP1395DW pinout, SN74GTLP1395DW application, or SN74GTLP1395DW equivalent, key selection criteria include GTLP/LVTTL level translation capability, ERC-controlled rise/fall times (1.0–3.0 ns), 20-pin SOIC-DW package compatibility, live-insertion support, and dual-channel independent enable/polarity control.

Technical Context

This device implements two independent 1-bit transceivers, each with separate A (LVTTL input), B (GTLP bidirectional I/O), and Y (LVTTL output) ports, enabling transparent or inverted data flow in both directions. Polarity control (T/C) and per-channel output enables (OEAB, OEBY) allow true/complement mode selection and isolated channel activation.

TI-OPC™ and OEC™ circuitry actively suppress overshoot and minimize bus settling time on unevenly loaded backplanes. Adjustable edge-rate control (ERC) selects fast (ERC = L) or slow (ERC = H) B-port transitions-enabling optimization of signal integrity versus data rate across distributed RLC loads down to 11 Ω.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Supply	3.15–3.45 V - Enables stable operation with 3.3-V LVTTL logic and GTLP interface compliance.
B-port Output Drive	100 mA sink - Supports incident-wave switching on heavily loaded backplanes (Z_eq ≥ 11 Ω).
LVTTL I/O Tolerance	5-V tolerant - Allows direct interface with TTL/5-V CMOS without level shifters.
Propagation Delay (A→B)	1.6–6.3 ns - Fast-mode t_PHL = 1.6 ns (ERC = L) enables >100-Mbps backplane timing margins.
Edge-Rate Control	ERC input selects fast/slow B-port edges - tr = 1.0 ns / tf = 2.0 ns (fast) or tr = 1.5 ns / tf = 2.6 ns (slow) into RLC load.
Live Insertion Support	Ioff, power-up 3-state, BIAS VCC - Prevents backflow current, ensures high-Z during power ramp, and preconditions B-port I/O before VCC application.
ESD Protection	±2000-V HBM, ±200-V MM, ±1000-V CDM - Meets industrial reliability requirements for hot-plug backplane cards.

Pinout & Package

SN74GTLP1395DW 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 (Rev. November 2001), top-view layout.

Pin/Terminal	Circuit Role	Design Meaning
1Y, 2Y	LVTTL output (feedback path)	Provides diagnostic visibility into B-port data; independently enabled by OEBY signals.
1A, 2A	LVTTL input	Accepts 5-V-tolerant control/data from host card; drives corresponding B port when OEAB active.
1B, 2B	GTLP bidirectional I/O	Interfaces directly to 1.5-V GTLP backplane; supports 100-mA drive and differential input (VREF referenced).
1OEAB, 2OEAB	B-port output enable	Active-low control; disables B-port drivers to prevent bus contention during arbitration or idle states.
1OEBY, 2OEBY	Y-output enable	Independent enable for feedback path; allows selective monitoring without affecting B-port operation.
1T/C, 2T/C	Polarity select	High = true mode (A→B, B→Y); low = complement mode (inverted A→B, inverted B→Y).
ERC	Edge-rate control	High = slow edges (reduced EMI); low = fast edges (maximized data rate on well-terminated loads).
VREF	GTLP input reference	Set to 1.0 V for GTLP mode; establishes differential threshold for noise-immune B-port reception.
BIAS VCC	Backplane I/O precharge	Applied before VCC to precondition B-port pins, enabling true live insertion without backplane disturbance.

Key Features

Feature	Design Value
Dual independent 1-bit transceivers	Enables concurrent 1394 data + strobe routing (e.g., 1A/1B/1Y for DATA, 2A/2B/2Y for STROBE) with no shared control resource contention.
Split LVTTL port with feedback path	Separate A (input) and Y (output) pins per channel provide real-time visibility into transmitted/received data for diagnostics and protocol validation.
Adjustable edge-rate control (ERC)	Hardware-selectable fast/slow B-port transitions optimize trade-off between signal integrity (overshoot suppression) and maximum achievable data rate on variable backplane loads.
TI-OPC™ and OEC™ circuitry	Actively limits ringing on unterminated or slot-uneven backplanes and reduces bus settling time-verified across multiple RLC load models.
Full live-insertion support	Ioff blocks reverse current during power-down; power-up 3-state prevents bus conflicts; BIAS VCC precharges B-port nodes prior to VCC ramp-enabling hot-swap in telecom and server backplanes.

Applications

IEEE 1394 Backplane Data Path	IEEE 1394 Backplane Strobe Path
Use Scenario: Transmitting 1394 serial data across parallel backplanes in multi-slot chassis (e.g., servers, test equipment). IC Role / Device Role / Timing Role: Level-translating and driving 100-Mbps GTLP data signals from LVTTL PHY controller (e.g., TSB14AA1) to backplane traces. Use Value: High-drive (100 mA) and TI-OPC™ ensure clean incident-wave switching even with 11-Ω equivalent load impedance and empty slots.	Use Scenario: Routing 1394 strobe signals alongside data for NRZ-DS encoded transmission in backplane implementations. IC Role / Device Role / Timing Role: Synchronizing strobe propagation with data using matched delay paths (t_sk(LH)/t_sk(HL) ≤ 0.4 ns) and identical ERC-controlled edges. Use Value: Sub-nanosecond skew between data and strobe channels maintains DS encoding integrity at 100 Mbps.
Hot-Pluggable Diagnostic Bus	Multi-Rate Clock Distribution
Use Scenario: Providing isolated, 5-V-tolerant feedback path for field-service diagnostics on powered-backplane systems. IC Role / Device Role / Timing Role: Capturing real-time B-port activity via dedicated Y outputs while maintaining independent OEAB/OEBY control. Use Value: Split A/Y architecture enables non-intrusive monitoring without disrupting active data flow or requiring additional bus observers.	Use Scenario: Distributing primary/secondary clocks (e.g., 25/50/100 MHz) across backplane slots with polarity inversion for phase alignment. IC Role / Device Role / Timing Role: Bidirectional clock repeater with selectable true/complement output (via T/C) and ERC tuning for jitter-sensitive timing domains. Use Value: Adjustable edge rates reduce deterministic jitter on long clock traces; 1.6-ns min t_PHL supports <1 ns clock uncertainty budgets.

IEEE 1394 Backplane Data Path

IEEE 1394 Backplane Strobe Path

Use Scenario: Transmitting 1394 serial data across parallel backplanes in multi-slot chassis (e.g., servers, test equipment).

IC Role / Device Role / Timing Role: Level-translating and driving 100-Mbps GTLP data signals from LVTTL PHY controller (e.g., TSB14AA1) to backplane traces.

Use Value: High-drive (100 mA) and TI-OPC™ ensure clean incident-wave switching even with 11-Ω equivalent load impedance and empty slots.

Use Scenario: Routing 1394 strobe signals alongside data for NRZ-DS encoded transmission in backplane implementations.

IC Role / Device Role / Timing Role: Synchronizing strobe propagation with data using matched delay paths (t_sk(LH)/t_sk(HL) ≤ 0.4 ns) and identical ERC-controlled edges.

Use Value: Sub-nanosecond skew between data and strobe channels maintains DS encoding integrity at 100 Mbps.

Hot-Pluggable Diagnostic Bus

Multi-Rate Clock Distribution

Use Scenario: Providing isolated, 5-V-tolerant feedback path for field-service diagnostics on powered-backplane systems.

IC Role / Device Role / Timing Role: Capturing real-time B-port activity via dedicated Y outputs while maintaining independent OEAB/OEBY control.

Use Value: Split A/Y architecture enables non-intrusive monitoring without disrupting active data flow or requiring additional bus observers.

Use Scenario: Distributing primary/secondary clocks (e.g., 25/50/100 MHz) across backplane slots with polarity inversion for phase alignment.

IC Role / Device Role / Timing Role: Bidirectional clock repeater with selectable true/complement output (via T/C) and ERC tuning for jitter-sensitive timing domains.

Use Value: Adjustable edge rates reduce deterministic jitter on long clock traces; 1.6-ns min t_PHL supports <1 ns clock uncertainty budgets.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LVTTL-to-GTLP bus transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74GTLP1394DW	Single 2-bit transceiver (vs. dual 1-bit); no split A/Y feedback path; no polarity control (T/C).	Suitable for simpler point-to-point GTLP links without diagnostics or complementary signaling needs.	Select when only basic level translation is required and board space permits consolidation of two channels into one device.
SN74GTLP1396DW	Includes integrated VREF generator (vs. external VREF); same pinout but different internal biasing; no BIAS VCC pin.	Reduces external component count for GTLP reference generation but lacks live-insertion precharge capability.	Prefer for cost-sensitive designs where backplane hot-swap is not required and VREF sourcing simplification outweighs loss of BIAS VCC functionality.

Compared with SN74GTLP1394DW and SN74GTLP1396DW, the SN74GTLP1395DW uniquely combines dual independent 1-bit channels, split feedback I/O, polarity selection, and full live-insertion support-making it the only option for IEEE 1394 backplane implementations requiring concurrent data/strobe routing with diagnostics and hot-swap reliability.

Availability

SN74GTLP1395DW is available at Aetrix Electronics and suitable for IEEE 1394 backplane systems, high-speed diagnostics buses, and multi-rate clock distribution networks requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for SN74GTLP1395DW 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 and backplane technologies.

The SN74GTLP1395DW belongs to TI's GTLP family-designed specifically for robust, high-drive, low-voltage signaling in IEEE 1394, FutureBus+, and VME64 backplane systems where signal integrity, live insertion, and level translation are critical.

FAQ

What is the function of the BIAS VCC pin on the SN74GTLP1395DW?

The BIAS VCC pin on the SN74GTLP1395DW preconditions the GTLP B-port I/O nodes prior to main VCC application, enabling true live insertion. When BIAS VCC is applied first (at 3.3 V), it charges internal capacitance on B-port pins, preventing disturbance of active backplane signals during card insertion. This feature is essential for hot-plug reliability in telecom and server backplanes and is validated per TI SCES349C Section "Live-Insertion Specifications".

How does the ERC input affect timing performance of the SN74GTLP1395DW?

The ERC input on the SN74GTLP1395DW selects between fast (ERC = L) and slow (ERC = H) B-port edge rates: fast mode yields t_r = 1.0 ns / t_f = 2.0 ns into RLC load, while slow mode gives t_r = 1.5 ns / t_f = 2.6 ns. This adjustment directly impacts maximum data rate (higher with fast edges) and signal integrity (better noise margin with slow edges), allowing system-level optimization for specific backplane termination and loading conditions.

Can the SN74GTLP1395DW operate with GTL (1.2-V) signaling instead of GTLP (1.5-V)?

Yes, the SN74GTLP1395DW supports both GTL (VTT = 1.2 V, VREF = 0.8 V) and GTLP (VTT = 1.5 V, VREF = 1.0 V) signaling standards per its recommended operating conditions table. The device's ac specifications are specified at GTLP, but dc parameters-including input thresholds and output drive-are compatible with GTL levels. Designers must adjust VTT and VREF accordingly and verify noise margins using TI application reports SCEA019 and SCEA017.

What is the purpose of the split LVTTL port (separate A and Y pins) in the SN74GTLP1395DW?

The split LVTTL port in the SN74GTLP1395DW-comprising dedicated A (input) and Y (output) pins per channel-creates an independent feedback path for diagnostics and control monitoring. Unlike conventional transceivers, this architecture allows real-time observation of B-port data via Y outputs without interfering with A-input data flow or requiring external test points, making it ideal for protocol validation and field-service troubleshooting in IEEE 1394 backplane systems.

Does the SN74GTLP1395DW support hot-swap in both LVTTL and GTLP domains?

Yes, the SN74GTLP1395DW supports full hot-swap capability across both domains: Ioff and power-up 3-state protect LVTTL A/Y pins during power sequencing, while BIAS VCC and dedicated live-insertion specs (Ioff ≤ 10 µA, IOZPU ≤ ±30 µA) ensure safe GTLP B-port insertion. TI validates this behavior per JESD78 Class II latch-up and ESD standards (2000-V HBM), confirming robustness for repeated card insertion/removal in live backplane environments.

SN74GTLP1395DW 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)

SN74GTLP1395DW FAQ

1.How can I place an order for SN74GTLP1395DW through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74GTLP1395DW 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 SN74GTLP1395DW reliable?

The price and inventory of SN74GTLP1395DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74GTLP1395DW is usually 5 days.

3.What payment methods are accepted for SN74GTLP1395DW?

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4.How is shipping managed for SN74GTLP1395DW?

SN74GTLP1395DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74GTLP1395DW 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 SN74GTLP1395DW?

For technical support, including SN74GTLP1395DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74GTLP1395DW requirements.

6.How does Aetrix verify that SN74GTLP1395DW is sourced from the original manufacturer or authorized distributors?

All SN74GTLP1395DW 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 SN74GTLP1395DW meets industry standards.

7.What is the process for return or replacement of SN74GTLP1395DW?

All SN74GTLP1395DW units undergo pre-shipment inspection (PSI). If there is an issue with SN74GTLP1395DW, 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 SN74GTLP1395DW part is unused and in its original packaging.

Return procedure for SN74GTLP1395DW:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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