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Texas Instruments SN74GTLP1395PW
- Part No.:
- SN74GTLP1395PW
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74GTLP1395PW.pdf
- Description:
- IC TRANSLATOR BIDIR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,031
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Product details
Overview
SN74GTLP1395PW 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 SN74GTLP1395PW datasheet, SN74GTLP1395PW pinout, SN74GTLP1395PW application, or SN74GTLP1395PW equivalent, this device is selected for IEEE 1394 backplane PHY interfacing, high-speed distributed-load clock distribution, diagnostics feedback paths in modular chassis, and hot-pluggable card edge interfaces requiring controlled edge rates and 5-V-tolerant control inputs.
Technical Context
The SN74GTLP1395PW implements two independent 1-bit transceivers, each with separate A (LVTTL input), B (GTLP I/O), and Y (LVTTL output) terminals, enabling true transparent or inverted data flow via T/C control and isolated enable paths (OEAB for B-port, OEBY for Y-output). Its TI-OPC™ circuitry actively suppresses overshoot on unevenly loaded backplanes, while OEC™ improves signal integrity and reduces EMI.
Edge-rate control is implemented via the ERC pin: ERC = H selects slow rise/fall times (~6.3 ns / ~6.7 ns A→B), ERC = L selects fast edges (~5.3 ns / ~5.6 ns A→B); both modes are characterized into distributed RLC loads matching real 1394 backplane topologies. The BIAS VCC pin preconditions GTLP I/O during live insertion, and VREF sets differential input threshold at 1 V for GTLP operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage (VCC) | 3.15 V to 3.45 V - ensures stable GTLP/LVTTL translation and enables TI-OPC/OEC functionality |
| GTLP Output Drive | 100 mA sink - supports incident-wave switching on backplanes with ≤11 Ω equivalent load impedance |
| LVTTL I/O Tolerance | 5-V tolerant A-port and control inputs - allows direct interface with legacy TTL/5-V CMOS without level shifters |
| Edge-Rate Control | ERC pin selects fast/slow B-port transitions - optimizes signal integrity vs. data rate trade-off across distributed loads |
| Live Insertion Support | Ioff, power-up 3-state, and BIAS VCC - prevents current backflow, bus conflict, and backplane disturbance during card hot-swap |
| Propagation Delay (A→B, Fast) | 2.5 ns (min) to 5.3 ns (typ) - enables reliable 100-Mbps IEEE 1394 backplane timing margins |
| Input Clamp Current | ±18 mA - meets JESD 22 Class II latch-up immunity (>100 mA) and robust ESD protection |
Pinout & Package
TSSOP-20 (PW) package: 6.5 mm × 4.4 mm, 0.65 mm pitch, thermally enhanced with exposed pad (not electrically connected). Pin 1 marked by beveled corner; pin numbering follows standard counter-clockwise sequence from top-left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1Y, 2Y | LVTTL output (feedback path) | Provides diagnostic visibility into B-port data; driven only when corresponding OEBY = L |
| 1A, 2A | LVTTL input (A-port) | 5-V tolerant; accepts TTL/CMOS logic levels; feeds data toward B-port or Y-output |
| 1B, 2B | GTLP bidirectional I/O (B-port) | Connects to backplane; requires VTT = 1.5 V termination and VREF = 1 V reference |
| 1OEAB, 2OEAB | B-port output enable (active low) | Controls GTLP driver state independently per channel; tied to PHY OCDOE in 1394 systems |
| 1OEBY, 2OEBY | Y-output enable (active low) | Enables feedback path; typically grounded to maintain continuous monitoring capability |
| 1T/C, 2T/C | Polarity control (true/complement) | Selects inversion: T/C = H → true mode; T/C = L → complement mode for strobe/data pairing |
| ERC | Edge-rate control input | ERC = L → fast edges (~5.3 ns A→B); ERC = H → slow edges (~6.3 ns A→B) for noise-sensitive loads |
| VREF | GTLP differential input reference | Set to 1 V for GTLP; establishes 0.8–1.1 V input threshold window; must be within 0.6 V of VTT |
| BIAS VCC | Backplane I/O precharge supply | Connected to 3.3 V during live insertion to precondition B-port pins and prevent data corruption |
| GND, VCC | Power terminals | Four GND pins (pins 4, 8, 13, 17) reduce ground bounce; VCC (pin 6) powers internal logic and drivers |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable edge-rate control (ERC) | Two discrete slew-rate settings allow system-level optimization of signal integrity vs. timing margin on real backplane RLC loads |
| Split LVTTL port with feedback path | Independent A-input and Y-output per channel enable real-time diagnostics and control-loop monitoring without external buffers |
| TI-OPC™ active overshoot suppression | Minimizes ringing on unterminated or unevenly loaded backplanes, preserving noise margin at 100 Mbps |
| OEC™ circuitry | Reduces electromagnetic interference and bus settling time through optimized output stage design validated on multiple backplane models |
| Live-insertion support (Ioff + power-up 3-state + BIAS VCC) | Enables true hot-swap capability in modular chassis: prevents backfeed, bus contention, and backplane disturbance during card insertion/removal |
| 5-V tolerant LVTTL interfaces | Eliminates need for external level translators when interfacing with legacy 5-V controllers or FPGAs in mixed-voltage systems |
Applications
| IEEE 1394 Backplane PHY Interface | Diagnostics Feedback Path |
|---|---|
Use Scenario: Interfacing TSB14AA1 or similar 1394 backplane PHYs to host link-layer controllers in modular chassis. IC Role / Device Role / Timing Role: Translates LVTTL strobe/data from PHY to GTLP backplane (A→B) and relays GTLP responses back as LVTTL feedback (B→Y). Use Value: Enables full-duplex 100-Mbps 1394 backplane operation with deterministic timing, live insertion, and hardware-level diagnostics visibility. |
Use Scenario: Providing real-time observability of backplane data flow for system-level fault isolation and maintenance. IC Role / Device Role / Timing Role: Captures GTLP bus activity via B-port and mirrors it as LVTTL-level Y-output for FPGA or microcontroller monitoring. Use Value: Eliminates need for external logic analyzers or probing; supports automated test, runtime health checks, and debug without interrupting traffic. |
| Hot-Pluggable Card Edge Interface | High-Speed Clock Distribution |
Use Scenario: Supporting live insertion of daughter cards into VME64, CPCI, or proprietary backplanes with GTLP signaling. IC Role / Device Role / Timing Role: Buffers and conditions control signals (e.g., reset, interrupt, presence detect) across the card edge using BIAS VCC and Ioff. Use Value: Prevents bus glitches, power sequencing conflicts, and data corruption during card insertion/removal in industrial and telecom systems. |
Use Scenario: Distributing primary/secondary clocks (e.g., 25/50/100 MHz) across parallel backplanes with minimal skew and jitter. IC Role / Device Role / Timing Role: Acts as a low-skew, high-drive repeater translating LVTTL clock sources to GTLP for fanout to multiple slots. Use Value: Achieves <1.5 ns output-to-output skew (tsk(t)) and sub-6 ns propagation delay, meeting tight timing budgets for synchronous backplane architectures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74GTLP1394PW | Single-channel version; identical pinout except missing second set of A/B/Y/OE/T/C/ERC pins | Suitable only for single-bit applications; lacks dual-channel feedback path and independent control per channel | Select when only one 1-bit GTLP interface is required and PCB space is constrained |
| SN74GTLP1396PW | Includes integrated 1394-specific control logic (e.g., automatic polarity handling for data/strobe pairs); different pin mapping for CTL0/CTL1 | Designed explicitly for TSB14AA1 PHY interface; not general-purpose for arbitrary GTLP translation | Select only for drop-in replacement in existing 1394 PHY designs where firmware expects dedicated control signaling |
Compared with SN74GTLP1394PW and SN74GTLP1396PW, the SN74GTLP1395PW offers unique dual independent channels with full feedback path per channel and general-purpose ERC/T/C control-making it optimal for custom backplane diagnostics, multi-clock distribution, or non-standard 1394 implementations requiring hardware-level flexibility.
Availability
SN74GTLP1395PW is available at Aetrix Electronics and suitable for IEEE 1394 backplane PHY interfacing, hot-pluggable card edge interfaces, and high-speed clock distribution requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial embedded systems.
Supply support for SN74GTLP1395PW 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 decades of expertise in high-speed interface solutions and industrial-grade reliability.
The SN74GTLP1395PW belongs to TI's GTLP family of backplane transceivers, designed specifically to enable robust, high-speed, hot-pluggable communication between LVTTL logic and GTLP backplanes in modular computing and telecom infrastructure.
FAQ
What is the primary function of the SN74GTLP1395PW in a backplane system?
The SN74GTLP1395PW serves as a dual 1-bit bidirectional level translator between 3.3-V LVTTL logic and GTLP backplane signals. It enables high-speed (up to 100 Mbps) data and strobe transmission across parallel backplanes while supporting live insertion, diagnostics feedback, and adjustable edge rates. In systems like IEEE 1394, the SN74GTLP1395PW interfaces directly with PHY controllers such as the TSB14AA1 to manage data/strobe routing and provide real-time observability via its split LVTTL port.
How does the ERC pin affect timing performance of the SN74GTLP1395PW?
The ERC (Edge-Rate Control) pin on the SN74GTLP1395PW selects between two discrete slew-rate settings for the GTLP B-port outputs: ERC = L enables fast edges (typ. 5.3 ns A→B tPLH), while ERC = H enables slower edges (typ. 6.3 ns A→B tPLH). This adjustment directly impacts signal integrity on distributed backplane loads - faster edges improve data rate but increase ringing risk on unterminated traces; slower edges enhance noise margin at the cost of marginally reduced maximum frequency. The choice is system-dependent and validated against actual RLC load models.
Can the SN74GTLP1395PW interface with 5-V logic devices?
Yes, the SN74GTLP1395PW's A-port inputs (1A, 2A), control inputs (1OEAB, 2OEAB, 1OEBY, 2OEBY, 1T/C, 2T/C, ERC), and Y-outputs (1Y, 2Y) are all 5-V tolerant. They operate at LVTTL voltage levels (VCC = 3.3 V) but accept input voltages up to 5.5 V without damage or functional degradation. This allows direct connection to legacy 5-V microcontrollers, FPGAs, or CPLDs without external level-shifting circuitry - a key advantage in mixed-voltage backplane systems.
What role does BIAS VCC play during live insertion of a card using the SN74GTLP1395PW?
BIAS VCC on the SN74GTLP1395PW preconditions the GTLP B-port I/O pins during live insertion by applying 3.3 V before VCC is powered. This precharges the backplane lines to avoid transient disturbances that could corrupt active data on the bus. When BIAS VCC is applied first (followed by GND, then I/O, then VCC), the SN74GTLP1395PW enters a safe high-impedance state without injecting noise - a critical requirement for hot-swap compliance in VME, CPCI, and IEEE 1394 chassis. Without proper BIAS VCC sequencing, the SN74GTLP1395PW cannot guarantee glitch-free insertion.
Is the SN74GTLP1395PW compatible with both GTL and GTLP signaling standards?
Yes, the SN74GTLP1395PW is specified for operation with both GTL (VTT = 1.2 V, VREF = 0.8 V) and GTLP (VTT = 1.5 V, VREF = 1.0 V) signal levels. While its AC specifications are published only for GTLP, the device's architecture supports either standard. For GTL use, VREF must be set to 0.8 V and remain within ±0.05 V of VTT; for GTLP, VREF = 1.0 V is recommended and must stay within 0.6 V of VTT. The SN74GTLP1395PW's OEC™ and TI-OPC™ circuitry remain fully functional under both configurations.
SN74GTLP1395PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74GTLP
- Package/Case:
- Packaging:
- Bulk
- 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-TSSOP (0.173", 4.40mm Width)
SN74GTLP1395PW FAQ
1.How can I place an order for SN74GTLP1395PW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74GTLP1395PW 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 SN74GTLP1395PW reliable?
The price and inventory of SN74GTLP1395PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74GTLP1395PW is usually 5 days.
3.What payment methods are accepted for SN74GTLP1395PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74GTLP1395PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74GTLP1395PW?
SN74GTLP1395PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74GTLP1395PW 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 SN74GTLP1395PW?
For technical support, including SN74GTLP1395PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74GTLP1395PW requirements.
6.How does Aetrix verify that SN74GTLP1395PW is sourced from the original manufacturer or authorized distributors?
All SN74GTLP1395PW 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 SN74GTLP1395PW meets industry standards.
7.What is the process for return or replacement of SN74GTLP1395PW?
All SN74GTLP1395PW units undergo pre-shipment inspection (PSI). If there is an issue with SN74GTLP1395PW, 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 SN74GTLP1395PW part is unused and in its original packaging.
Return procedure for SN74GTLP1395PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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