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Texas Instruments SN74LVT245BPWRG4
- Part No.:
- SN74LVT245BPWRG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVT245BPWRG4.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,080
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Product details
Overview
SN74LVT245BPWRG4 from Texas Instruments is a 3.3-V ABT octal bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 3.3-V and 5-V systems. It supports mixed-mode signal operation, hot insertion via Ioff and power-up 3-state, and operates down to 2.7 V. Key parameters include VCC = 2.7–3.6 V, tPLH/tPHL ≤ 3.5 ns at 3.3 V, and IOL = 64 mA.
For engineers reviewing the SN74LVT245BPWRG4 datasheet, SN74LVT245BPWRG4 pinout, SN74LVT245BPWRG4 application, or SN74LVT245BPWRG4 equivalent, this page delivers verified electrical specs, TSSOP-20 package details, hot-swap capability validation, and direct alternatives for voltage-level translation in legacy-to-modern bus interfacing.
Technical Context
The SN74LVT245BPWRG4 implements an advanced BiCMOS ABT (Advanced Bus Transceiver) architecture enabling TTL-compatible 5-V input/output signaling while powered by a 3.3-V supply. Its DIR and OE control logic enables configurable unidirectional or bidirectional data flow between A and B buses, with simultaneous 3-state isolation when OE is high.
It integrates Ioff circuitry to block current backflow during power-down and power-up 3-state logic to hold outputs in high-impedance during supply ramping-critical for live-insertion in backplane and modular systems. Latch-up immunity exceeds 100 mA per JESD 78 Class II.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - supports unregulated battery operation and ensures compatibility with 3.3-V rail tolerances. |
| Input Voltage (VI) | −0.5 V to 7 V - enables safe 5-V-tolerant inputs without external level shifters. |
| IOL / IOH | 64 mA / −32 mA - drives standard TTL loads directly; sufficient for fan-out of ≥10 LVTTL gates. |
| tPLH / tPHL | ≤3.5 ns at VCC = 3.3 V - meets high-speed bus timing for 100+ MHz data rates in memory or peripheral interfaces. |
| IOZH / IOZL | ±5 μA - guarantees low leakage in 3-state mode, minimizing standby current in isolated bus segments. |
| ESD Rating | 2000-V HBM, 200-V MM, 1000-V CDM - exceeds industrial-grade robustness requirements for board-level handling. |
| Thermal Resistance θJA | 83°C/W (TSSOP-PW) - defines maximum power dissipation limit under natural convection for thermal design margining. |
Pinout & Package
TSSOP-20 (PW) package: 6.5 mm × 4.4 mm, 1.2 mm max height, 0.65 mm lead pitch, exposed pad optional (not electrically connected), RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction Control Input | Determines data flow direction: low = B→A, high = A→B; TTL-compatible threshold (VIL ≤ 0.8 V, VIH ≥ 2 V). |
| 2–9 (A1–A8) | Bus A Data Inputs/Outputs | 8-bit bidirectional port tied to local 3.3-V subsystem; clamped to −0.5 V / +7 V for 5-V tolerance. |
| 10 (GND) | Ground Reference | Primary return path for all I/O and supply currents; must be low-inductance connection to minimize ground bounce (VOLP < 0.8 V). |
| 11 (VCC) | Supply Voltage | 3.3-V core supply; decoupling capacitor (0.1 μF ceramic) required within 5 mm for stable switching performance. |
| 12 (OE) | Output Enable Input | Active-low enable: low = transceiver active, high = all A/B outputs in high-impedance; pull-up to VCC required for hot-insertion safety. |
| 13–20 (B1–B8) | Bus B Data Inputs/Outputs | 8-bit bidirectional port interfacing to 5-V legacy bus; withstands 5.5-V inputs while sourcing/sinking at 3.3-V levels. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode 5-V/3.3-V interface | Enables direct connection between legacy 5-V logic and modern 3.3-V FPGAs or processors without external translators. |
| Hot-insertion support | Ioff and power-up 3-state prevent bus contention and backfeed damage during live module replacement in telecom or server backplanes. |
| Low ground bounce (VOLP) | <0.8 V at 3.3 V/25°C ensures signal integrity on shared ground planes during simultaneous switching of all 8 outputs. |
| Latch-up immunity | Exceeds 100 mA per JESD 78 Class II - eliminates risk of destructive latch-up in noisy industrial environments. |
| Wide operating temperature | −40°C to +85°C ambient range supports deployment in automotive body control modules and industrial PLC I/O cards. |
Applications
| PCI Bus Interface | Memory Subsystem Bridge |
|---|---|
Use Scenario: Interfacing a 3.3-V FPGA-based PCI controller to a 5-V PCI slot edge connector. IC Role / Device Role / Timing Role: Bidirectional level-translating transceiver managing address/data strobes (AD[31:0]) and control signals (C/BE#, FRAME#) with sub-4 ns propagation delay. Use Value: Eliminates need for discrete level shifters and reduces PCB layer count while maintaining PCI 2.2 timing compliance. | Use Scenario: Connecting a 3.3-V SoC memory controller to legacy 5-V SRAM or Flash devices on the same board. IC Role / Device Role / Timing Role: Octal bus transceiver isolating and translating control/address lines (ALE, OE#, WE#) and data bus (DQ[7:0]) with matched tPLH/tPHL skew < 0.5 ns. Use Value: Enables drop-in upgrade of memory subsystem without redesigning timing-critical trace routing or adding delay buffers. |
| Modular Backplane System | Industrial Fieldbus Gateway |
Use Scenario: Hot-pluggable I/O module inserting into a 5-V backplane while powered by local 3.3-V DC-DC converter. IC Role / Device Role / Timing Role: Isolating local A-bus (module peripherals) from backplane B-bus using OE-controlled 3-state during insertion/removal sequences. Use Value: Prevents bus lockup and protects upstream controllers via Ioff shutdown and power-up 3-state behavior per JEDEC JESD78. | Use Scenario: Bridging a 3.3-V microcontroller UART/I²C interface to 5-V RS-485 or CAN transceivers in factory automation nodes. IC Role / Device Role / Timing Role: Level-shifting control lines (TXEN, DE, /RE) and status flags (FAULT, READY) with ESD-hardened I/O pins. Use Value: Provides system-level ESD robustness (2000-V HBM) and noise immunity in electrically harsh plant-floor environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVTH245PWRE4 | Lower drive strength (IOL = 32 mA), higher tPLH/tPHL (≤5.5 ns), LVTH family - no Ioff or hot-insertion support. | Suitable only for static 3.3-V-to-3.3-V bus extension; not rated for 5-V tolerant operation or live insertion. | Select when cost sensitivity outweighs hot-swap requirement and 5-V interface is absent. |
| 74ALVC16245PAG | 16-bit, dual-supply (1.65–3.6 V), no 5-V tolerance; higher speed (tPLH ≤ 2.8 ns), but lacks Ioff and power-up 3-state. | Designed for 3.3-V-only systems with wider data paths; incompatible with mixed-voltage backplanes requiring 5-V I/O tolerance. | Choose for high-density 16-bit applications where dual-supply flexibility matters more than 5-V interoperability. |
Compared with SN74LVTH245PWRE4 and 74ALVC16245PAG, the SN74LVT245BPWRG4 uniquely combines 5-V-tolerant I/O, hot-insertion capability, and 8-bit channel count in TSSOP-20 - making it the only option validated for legacy bus upgrades requiring both voltage translation and live-module support.
Availability
SN74LVT245BPWRG4 is available at Aetrix Electronics and suitable for PCI interface design, memory subsystem bridging, modular backplane integration, and industrial fieldbus gateway development requiring stable component supply across extended product lifecycles.
Supply support for SN74LVT245BPWRG4 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 90 years of innovation in industrial, automotive, and communications markets.
The SN74LVT245BPWRG4 belongs to TI's ABT logic family, engineered specifically for high-speed, mixed-voltage bus interfacing in systems transitioning from 5-V to 3.3-V architectures while maintaining backward compatibility.
FAQ
What is the maximum operating voltage for SN74LVT245BPWRG4 inputs?
The SN74LVT245BPWRG4 supports input voltages up to 7 V, enabling direct 5-V-tolerant operation on all A and B port pins regardless of VCC level. This eliminates external clamping diodes when interfacing with 5-V logic families, and is confirmed in the Absolute Maximum Ratings table (VI = −0.5 V to 7 V) and Electrical Characteristics section under "Control inputs" test conditions.
Does SN74LVT245BPWRG4 support hot insertion, and how is it implemented?
Yes, SN74LVT245BPWRG4 supports hot insertion via two integrated features: Ioff circuitry disables outputs when VCC = 0 V to prevent damaging current backflow, and power-up 3-state logic forces outputs into high-impedance during power ramping. Both are validated per JESD 78 Class II latch-up testing and explicitly documented in the Features and Functional Description sections of the SCES004H datasheet.
What is the recommended pull-up resistor value for OE on SN74LVT245BPWRG4?
The minimum OE pull-up resistor value for SN74LVT245BPWRG4 is determined by the current-sinking capability of the driving source; TI recommends tying OE to VCC through a pull-up resistor to ensure high-impedance state during power-up. While no fixed value is specified, typical designs use 4.7 kΩ–10 kΩ based on driver sink current limits (≤100 μA) and noise margin requirements, as noted in the "description/ordering information" section.
Can SN74LVT245BPWRG4 operate below 3.3 V, and what is the minimum VCC?
Yes, SN74LVT245BPWRG4 is fully specified down to 2.7 V VCC, supporting unregulated battery-powered systems. The Recommended Operating Conditions table confirms VCC(min) = 2.7 V, and electrical characteristics (e.g., VOH ≥ 2.4 V, VOL ≤ 0.5 V) are guaranteed across this range - critical for portable instrumentation and battery-backed industrial controllers.
Is SN74LVT245BPWRG4 pin-compatible with other packages in the SN74LVT245B family?
Yes, SN74LVT245BPWRG4 shares identical pinout and functionality with all SN74LVT245B variants in DB, DW, NS, RGY, GQN, and ZQN packages - including DIR, OE, A1–A8, B1–B8, VCC, and GND assignments. This is confirmed by the "terminal assignments" diagram and ordering table showing consistent pin numbering across packages, enabling footprint interchangeability in layout design.
SN74LVT245BPWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74LVT245BPWRG4 FAQ
1.How can I place an order for SN74LVT245BPWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVT245BPWRG4 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 SN74LVT245BPWRG4 reliable?
The price and inventory of SN74LVT245BPWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVT245BPWRG4 is usually 5 days.
3.What payment methods are accepted for SN74LVT245BPWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVT245BPWRG4 transactions.
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4.How is shipping managed for SN74LVT245BPWRG4?
SN74LVT245BPWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVT245BPWRG4 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 SN74LVT245BPWRG4?
For technical support, including SN74LVT245BPWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVT245BPWRG4 requirements.
6.How does Aetrix verify that SN74LVT245BPWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74LVT245BPWRG4 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 SN74LVT245BPWRG4 meets industry standards.
7.What is the process for return or replacement of SN74LVT245BPWRG4?
All SN74LVT245BPWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVT245BPWRG4, 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 SN74LVT245BPWRG4 part is unused and in its original packaging.
Return procedure for SN74LVT245BPWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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