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

Texas Instruments SN74GTLP1395DWR

Name: SN74GTLP1395DWR
Brand: Texas Instruments
SKU: SN74GTLP1395DWR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74GTLP1395DWR

Manufacturer:: Texas Instruments

Category:: Translators, Level Shifters

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Datasheet:: SN74GTLP1395DWR.pdf

Description:: IC TRANSLTR BIDIRECTIONAL 20SOIC

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Product details

Overview

SN74GTLP1395DWR from Texas Instruments is a dual 1-bit LVTTL-to-GTLP adjustable-edge-rate bus transceiver with split LVTTL port, feedback path, and selectable polarity. It provides bidirectional signal-level translation between 3.3-V LVTTL logic (5-V tolerant) and GTLP backplane signals (VTT = 1.5 V, VREF = 1 V), 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.

For engineers reviewing the SN74GTLP1395DWR datasheet, SN74GTLP1395DWR pinout, SN74GTLP1395DWR application, or SN74GTLP1395DWR equivalent, this device is selected for IEEE 1394 backplane PHY interfacing, high-speed distributed-load backplane clock/data distribution, and diagnostics monitoring in VME/FB+/CPCI systems requiring adjustable edge-rate control, true/complement polarity selection, and robust hot-plug capability.

Technical Context

The SN74GTLP1395DWR implements two independent 1-bit transceivers, each with separate A-port (LVTTL), B-port (GTLP), and Y-output (LVTTL feedback) paths. Its TI-OPC™ circuitry actively limits overshoot during low-to-high transitions on unevenly terminated backplanes, while OEC™ improves signal integrity and reduces EMI.

Edge-rate control is managed via the ERC input: ERC = H selects slow rise/fall times (~1.5–3 ns), optimizing noise margin at 25/50 MHz; ERC = L enables fast edges (~1.0–2.0 ns) for higher data rates. Polarity is selected per channel by T/C inputs, enabling true or complementary data transmission in both directions.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage (VCC)	3.15 V to 3.45 V - ensures stable operation across industrial temperature range and compatibility with 3.3-V LVTTL logic domains.
GTLP Output Drive	100 mA - enables incident-wave switching on distributed backplane loads with characteristic impedance as low as 11 Ω.
LVTTL Output Drive	±24 mA - supports direct interface to standard 5-V-tolerant LVTTL/TTL/CMOS logic without level-shifting buffers.
Propagation Delay (A→B, Fast)	2.5 ns (typ) - delivers sub-5 ns timing for 100-Mbps backplane data transfer under distributed RLC load conditions.
Input Voltage Range (A-port)	0 V to 5.5 V - guarantees 5-V tolerance for legacy TTL/CMOS compatibility and mixed-voltage system integration.
ERC-Controlled Edge Rate	Fast: tr/tf = 1.3/2.7 ns; Slow: tr/tf = 2.4/3.0 ns - allows dynamic optimization of signal integrity vs. data rate in varying backplane topologies.
Live Insertion Support	Ioff < 10 μA at VCC = 0 V; BIAS VCC precharges B-port I/O - prevents backplane disturbance and driver conflict during card hot-swap.

Pinout & Package

SN74GTLP1395DWR is housed in a 20-pin SOIC (DW) package with 0.300-inch body width and standard JEDEC MS-013AC footprint. Pin assignments are validated per TI SCES349C datasheet Figure 1 (DGV/DW/PW top view).

Pin	Circuit Role	Design Meaning
1	1Y	LVTTL output providing feedback path from B-port for diagnostics and control monitoring.
2	1T/C	Polarity control for Channel 1: high = true mode, low = complement mode for bidirectional data inversion.
3	2Y	LVTTL output for Channel 2 feedback path - enables independent strobe/data monitoring in 1394 PHY interfaces.
4	GND	Ground reference for A-port, control logic, and internal biasing - must be connected before VCC for live-insertion safety.
5	1OEAB	Output-enable for Channel 1 B-port: low = active GTLP driver, high = high-Z - used with OCDOE from TSB14AA1 PHY.
6	VCC	Main 3.3-V supply for A-port logic, control circuitry, and internal regulators - powers TI-OPC/OEC circuitry.
7	1A	LVTTL input for Channel 1 data/strobe - 5-V tolerant, connects directly to link-layer controller outputs.
8	GND	Second ground pin - decouples noise between A-port and B-port sections in high-speed operation.
9	2A	LVTTL input for Channel 2 - typically used for 1394 strobe (Rstrb/Tstrb) in TSB14AA1 interface configurations.
10	2OEAB	Output-enable for Channel 2 B-port - tied to same OCDOE signal as 1OEAB in standard 1394 implementations.
11	1OEBY	Output-enable for Channel 1 Y-feedback: low = active, high = high-Z - typically tied to GND to maintain always-on receive path.
12	2T/C	Polarity control for Channel 2 - independently configurable for true/complement strobe or data routing.
13	2OEBY	Output-enable for Channel 2 Y-feedback - also tied to GND in reference designs to ensure continuous backplane monitoring.
14	GND	Third ground pin - critical for B-port differential input stability and VREF reference integrity.
15	1B	GTLP bidirectional I/O for Channel 1 - connects to backplane data trace; requires VTT termination and VREF reference.
16	ERC	Edge-rate control input: high = slow edges (optimized for S50/S100), low = fast edges (for higher bandwidth).
17	2B	GTLP bidirectional I/O for Channel 2 - used for 1394 strobe (BPstrb) in TSB14AA1 interface; shares VTT/VREF with 1B.
18	GND	Fourth ground pin - completes low-inductance return path for high-current GTLP outputs.
19	VREF	Differential input reference voltage for B-port (typically 1.0 V for GTLP) - sets noise margin and threshold for GTLP receivers.
20	BIAS VCC	Precharge supply for B-port I/O pins during live insertion - connected to 3.3 V to enable hot-swap without backplane disturbance.

Key Features

Feature	Design Value
Adjustable Edge-Rate Control (ERC)	Two discrete slew-rate settings (fast/slow) per B-port output - enables system-level tuning of signal integrity vs. timing margin without hardware change.
Split LVTTL Port with Feedback Path	Dedicated A-input and Y-output per channel - provides real-time visibility into backplane data/strobe for diagnostics, error detection, and protocol debugging.
TI-OPC™ Overshoot Control Circuitry	Active clamping during low-to-high transitions - suppresses ringing on unterminated or unevenly loaded backplanes, preserving noise margin at 100 Mbps.
Live Insertion Support	Integrated Ioff, power-up 3-state, and BIAS VCC - eliminates need for external hot-swap controllers and enables true zero-downtime card replacement.
Selectable Polarity (T/C Input)	Per-channel true/complement mode selection - simplifies interface to PHYs requiring inverted strobes or data alignment without external inverters.
5-V Tolerant LVTTL I/O	A-port and control inputs accept 0–5.5 V - allows seamless integration with legacy 5-V microcontrollers, FPGAs, and ASICs in mixed-voltage backplane systems.

Applications

IEEE 1394 Backplane PHY Interface	VME/FB+/CPCI Diagnostic Bus
Use Scenario: Interfacing TSB14AA1 1394 backplane PHY to host link-layer controller in embedded chassis systems. IC Role / Device Role / Timing Role: Translates LVTTL data/strobe (D0/D1, Rstrb/Tstrb) to GTLP levels for backplane transmission and provides LVTTL feedback (1Y/2Y) for real-time monitoring. Use Value: Enables full 100-Mbps 1394 backplane operation with live insertion, eliminating need for discrete level shifters and reducing BOM count by two ICs per slot.	Use Scenario: Adding auxiliary diagnostic communication channel across VME64 or FutureBus+ backplanes for firmware update and health monitoring. IC Role / Device Role / Timing Role: Provides isolated, high-drive GTLP data path between service processor and peripheral modules while maintaining LVTTL host-side compatibility. Use Value: Delivers deterministic sub-5 ns propagation delay and 100 mA drive to overcome skew and attenuation in 20-slot distributed backplanes.
Hot-Swappable Module Control	High-Speed Clock Distribution
Use Scenario: Enabling safe live insertion/removal of compute blades in telecom or industrial rack systems with shared backplane infrastructure. IC Role / Device Role / Timing Role: Acts as GTLP buffer with BIAS VCC precharge and Ioff protection - isolates powered-down modules from active backplane signals. Use Value: Prevents bus contention and ground bounce during hot-swap events, meeting IEC 61000-4-2 Level 4 ESD immunity requirements.	Use Scenario: Distributing primary/secondary clocks (e.g., 25/50 MHz) across multi-slot backplanes with matched skew and minimal jitter accumulation. IC Role / Device Role / Timing Role: Functions as low-skew, edge-controlled clock repeater - uses ERC to balance rise/fall symmetry and reduce duty-cycle distortion. Use Value: Achieves <1.5 ns inter-channel skew (tsk(t)) and <0.4 ns output-to-output skew (tsk(HL)), supporting synchronous sampling at 100 MHz.

IEEE 1394 Backplane PHY Interface

VME/FB+/CPCI Diagnostic Bus

Use Scenario: Interfacing TSB14AA1 1394 backplane PHY to host link-layer controller in embedded chassis systems.

IC Role / Device Role / Timing Role: Translates LVTTL data/strobe (D0/D1, Rstrb/Tstrb) to GTLP levels for backplane transmission and provides LVTTL feedback (1Y/2Y) for real-time monitoring.

Use Value: Enables full 100-Mbps 1394 backplane operation with live insertion, eliminating need for discrete level shifters and reducing BOM count by two ICs per slot.

Use Scenario: Adding auxiliary diagnostic communication channel across VME64 or FutureBus+ backplanes for firmware update and health monitoring.

IC Role / Device Role / Timing Role: Provides isolated, high-drive GTLP data path between service processor and peripheral modules while maintaining LVTTL host-side compatibility.

Use Value: Delivers deterministic sub-5 ns propagation delay and 100 mA drive to overcome skew and attenuation in 20-slot distributed backplanes.

Hot-Swappable Module Control

High-Speed Clock Distribution

Use Scenario: Enabling safe live insertion/removal of compute blades in telecom or industrial rack systems with shared backplane infrastructure.

IC Role / Device Role / Timing Role: Acts as GTLP buffer with BIAS VCC precharge and Ioff protection - isolates powered-down modules from active backplane signals.

Use Value: Prevents bus contention and ground bounce during hot-swap events, meeting IEC 61000-4-2 Level 4 ESD immunity requirements.

Use Scenario: Distributing primary/secondary clocks (e.g., 25/50 MHz) across multi-slot backplanes with matched skew and minimal jitter accumulation.

IC Role / Device Role / Timing Role: Functions as low-skew, edge-controlled clock repeater - uses ERC to balance rise/fall symmetry and reduce duty-cycle distortion.

Use Value: Achieves <1.5 ns inter-channel skew (tsk(t)) and <0.4 ns output-to-output skew (tsk(HL)), supporting synchronous sampling at 100 MHz.

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
SN74GTLP1394DWR	Single-channel version with identical pinout, ERC, and live-insertion features but only one 1-bit transceiver pair (no 2nd channel).	Suitable for point-to-point or single-signal applications (e.g., dedicated clock line), not dual-data/strobe pairs.	Select when only one GTLP data path is required - reduces PCB area and cost but lacks redundancy or dual-signal capability.
SN74GTLP1399DWR	Includes integrated VREF generator and enhanced OEC circuitry; supports wider VTT range (1.14–1.65 V) and lower ICC (15 mA typical).	Better suited for new designs targeting lower power and tighter noise margins; not drop-in compatible due to VREF pin reassignment.	Choose for next-generation backplanes where power efficiency and extended GTL/GTLP interoperability are prioritized over legacy pin compatibility.

Compared with SN74GTLP1394DWR and SN74GTLP1399DWR, the SN74GTLP1395DWR uniquely provides dual independent transceivers with fully separated polarity and enable controls - essential for 1394 data/strobe pairing and diagnostic feedback paths in production backplane systems.

Availability

SN74GTLP1395DWR is available at Aetrix Electronics and suitable for IEEE 1394 backplane PHY interfacing, VME/FB+/CPCI diagnostic bus expansion, and hot-swappable module control requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for SN74GTLP1395DWR 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.

The SN74GTLP1395DWR belongs to TI's GTLP family of backplane transceivers, designed specifically to enable robust, high-speed, live-insertion-capable interfaces between LVTTL logic and GTLP backplanes in industrial, telecom, and computing chassis systems.

FAQ

What is the function of the BIAS VCC pin on the SN74GTLP1395DWR?

The BIAS VCC pin on the SN74GTLP1395DWR supplies precharge current to the B-port GTLP I/O pins during live insertion. When connected to 3.3 V before VCC, it conditions the backplane lines to prevent transient disturbances and ensure glitch-free operation during card hot-swap - a core requirement for IEEE 1394-compliant backplane systems using the SN74GTLP1395DWR.

How does the ERC input affect timing performance of the SN74GTLP1395DWR?

The ERC input on the SN74GTLP1395DWR selects between two discrete edge-rate modes: ERC = L enables fast edges (tr/tf ≈ 1.3/2.7 ns), reducing propagation delay for higher data rates; ERC = H enables slow edges (tr/tf ≈ 2.4/3.0 ns), improving noise margin and signal integrity on long or lightly loaded backplanes - both validated in the SN74GTLP1395DWR's distributed-load switching characteristics table.

Can the SN74GTLP1395DWR operate with GTL (1.2-V VTT) instead of GTLP (1.5-V VTT)?

Yes, the SN74GTLP1395DWR supports both GTL (VTT = 1.2 V, VREF = 0.8 V) and GTLP (VTT = 1.5 V, VREF = 1.0 V) signaling standards. Its ac specifications are guaranteed for GTLP, but dc parameters allow flexible use at GTL levels - confirmed in the SN74GTLP1395DWR recommended operating conditions table and TI application report SCEA019.

What is the purpose of the split LVTTL port (A and Y pins) in the SN74GTLP1395DWR?

The split LVTTL port in the SN74GTLP1395DWR - with separate A inputs and Y outputs - creates a dedicated feedback path from the B-port GTLP bus back to the LVTTL domain. This enables real-time monitoring of transmitted data/strobe signals for diagnostics, protocol validation, and fault detection without interrupting normal operation - a key feature leveraged in TSB14AA1-based 1394 backplane implementations using the SN74GTLP1395DWR.

Is the SN74GTLP1395DWR pin-compatible with other packages like PW or DGVR?

No, the SN74GTLP1395DWR (SOIC-DW) is not pin-compatible with SN74GTLP1395PWR (TSSOP-PW) or SN74GTLP1395DGVR (TVSOP-DGV), despite identical functionality and logic. While all share the same 20-pin assignment order, their physical footprints, thermal characteristics, and solder-reflow profiles differ - requiring separate PCB layouts. This distinction is explicitly documented in TI's SCES349C datasheet and packaging addendum for the SN74GTLP1395DWR.

SN74GTLP1395DWR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74GTLP

Package/Case:

Packaging:: Tape & Reel (TR)

Product Status:: Active

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)

SN74GTLP1395DWR FAQ

1.How can I place an order for SN74GTLP1395DWR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74GTLP1395DWR 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 SN74GTLP1395DWR reliable?

The price and inventory of SN74GTLP1395DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74GTLP1395DWR is usually 5 days.

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Once your SN74GTLP1395DWR 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 SN74GTLP1395DWR?

For technical support, including SN74GTLP1395DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74GTLP1395DWR requirements.

6.How does Aetrix verify that SN74GTLP1395DWR is sourced from the original manufacturer or authorized distributors?

All SN74GTLP1395DWR 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 SN74GTLP1395DWR meets industry standards.

7.What is the process for return or replacement of SN74GTLP1395DWR?

All SN74GTLP1395DWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74GTLP1395DWR, 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 SN74GTLP1395DWR part is unused and in its original packaging.

Return procedure for SN74GTLP1395DWR:

1.Submit a request within 90 days.

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

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