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Texas Instruments SN74LVT245BPWRE4
- Part No.:
- SN74LVT245BPWRE4
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVT245BPWRE4.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,618
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Product details
Overview
SN74LVT245BPWRE4 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 supply. 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 SN74LVT245BPWRE4 datasheet, SN74LVT245BPWRE4 pinout, SN74LVT245BPWRE4 application, or SN74LVT245BPWRE4 equivalent, this page delivers verified electrical specs, TSSOP-20 package details, hot-swap capability validation, and direct alternatives for voltage-level translation in embedded bus interfaces.
Technical Context
The SN74LVT245BPWRE4 implements an advanced BiCMOS ABT (Advanced BiCMOS Technology) architecture enabling TTL-compatible input thresholds while operating from a 3.3-V supply. Its dual-bus direction control (DIR) and output-enable (OE) inputs allow configurable A↔B data flow with isolation during high-impedance states.
It integrates Ioff circuitry to block current backflow when powered down and power-up 3-state logic to hold outputs high-Z during supply ramp-up-critical for live insertion in backplane and modular systems. Absolute max ratings support VI up to 7 V and VO up to 7 V in high-Z state, confirming robust 5-V-tolerant I/O.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - Enables stable operation across unregulated battery supplies and low-noise 3.3-V rails. |
| Propagation Delay | tPLH/tPHL ≤ 3.5 ns at VCC = 3.3 V - Supports high-speed bus communication up to ~100 MHz system timing. |
| Output Drive | IOL = 64 mA, IOH = −32 mA - Sufficient to drive 50-pF loads with fast edge rates and minimal ground bounce (VOLP < 0.8 V). |
| Input Voltage Tolerance | VI up to 7 V - Allows direct connection to 5-V logic without external level shifters. |
| Hot-Insertion Support | Ioff ≤ ±100 μA at VCC = 0 - Prevents damaging back-current during live board insertion into powered backplanes. |
| ESD Protection | HBM = 2000 V, MM = 200 V, CDM = 1000 V - Meets industrial-grade ESD robustness per JESD22 standards. |
| Operating Temperature | −40°C to +85°C - Qualified for extended industrial temperature range applications. |
Pinout & Package
TSSOP-20 (PW) package: 6.5 mm × 4.4 mm body, 0.65 mm lead pitch, 1.2 mm max height, exposed thermal pad not present (standard PW variant). Pin 1 index located at top-left corner with notch marking orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction Control Input | Low = B-to-A data transfer; High = A-to-B data transfer; determines bus flow direction asynchronously. |
| 2–9 (A1–A8) | Port A Data Inputs/Outputs | Bidirectional I/O pins connected to local 3.3-V or 5-V bus; driven by DIR/OE state. |
| 10 (GND) | Ground Reference | Primary return path for all internal logic and output drivers; must be low-inductance connection. |
| 11 (VCC) | Supply Voltage | 3.3-V nominal supply; supports down to 2.7 V for brownout tolerance in battery-powered systems. |
| 12 (OE) | Output Enable Input | Active-Low control: OE = Low enables transceiver; OE = High forces all A/B pins to high-impedance state. |
| 13–20 (B1–B8) | Port B Data Inputs/Outputs | Bidirectional I/O pins interfacing to remote bus; electrically identical to A-side with same voltage tolerance. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-Mode Signal Operation | Accepts 5-V inputs and drives 5-V loads while powered from 3.3-V VCC - eliminates external level translators in hybrid-voltage systems. |
| Hot-Insertion Support | Ioff and power-up 3-state ensure zero current backflow and automatic high-Z on power ramp - enables safe live replacement in telecom and server backplanes. |
| Low Ground Bounce | VOLP < 0.8 V at VCC = 3.3 V - minimizes noise coupling into shared ground planes during high-speed switching. |
| Latch-Up Immunity | Exceeds 100 mA per JESD78 Class II - guarantees robustness against transient-induced latch-up in noisy industrial environments. |
| Wide Operating Supply | Functional from 2.7 V to 3.6 V - supports single-cell Li-ion and regulated 3.3-V rails without external regulators. |
Applications
| Industrial Backplane Interface | Embedded System Bus Bridge |
|---|---|
Use Scenario: Connecting a 3.3-V microcontroller bus to legacy 5-V peripheral modules in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional voltage-translating bus transceiver managing A↔B data flow under DIR control with OE-gated isolation. Use Value: Eliminates discrete level-shifter components and reduces BOM count while maintaining signal integrity at >50-MHz effective data rates. | Use Scenario: Isolating CPU and FPGA buses during firmware updates in medical imaging subsystems. IC Role / Device Role / Timing Role: 3-state-enabled bus isolator activated by system controller to decouple domains during reconfiguration. Use Value: Prevents bus contention and data corruption during hot reprogramming, leveraging power-up 3-state behavior. |
| Modular Test Equipment | Automated Test Fixture |
Use Scenario: Hot-swappable module interface in semiconductor ATE where daughterboards plug into powered mainframes. IC Role / Device Role / Timing Role: Hot-insertion-qualified transceiver providing galvanically isolated data path with Ioff protection. Use Value: Enables field-replaceable modules without powering down test racks, improving uptime and reducing maintenance downtime. | Use Scenario: Interfacing boundary-scan controllers to DUT boards with mixed 3.3-V/5-V I/O standards. IC Role / Device Role / Timing Role: Level-translating scan-path buffer supporting IEEE 1149.1 TDI/TDO/TCK signals across voltage domains. Use Value: Maintains precise timing margins (tPLH/tPHL ≤ 3.5 ns) required for high-speed JTAG compliance at 25 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVTH245PWRE4 | Lower drive strength (IOL = 24 mA), no Ioff, 2.7–3.6 V only, no 5-V-tolerant inputs. | Suitable for intra-3.3-V bus extension only; not for 5-V interface or hot-swap. | Select when cost sensitivity outweighs mixed-voltage or hot-insertion requirements. |
| SN74ALVC245PWR | Higher speed (tPD ≤ 2.8 ns), lower ICC (0.1 μA), but no Ioff and VI max = 3.6 V - not 5-V tolerant. | Optimized for low-power, high-speed 3.3-V-only systems; lacks backplane robustness. | Choose for portable/embedded designs prioritizing quiescent current and propagation delay over voltage translation. |
Compared with SN74LVTH245PWRE4 and SN74ALVC245PWR, the SN74LVT245BPWRE4 uniquely combines 5-V-tolerant I/O, hot-insertion support, and 64-mA drive in a single TSSOP-20 package - making it the only option among the three qualified for mixed-voltage backplane interconnects requiring live insertion.
Availability
SN74LVT245BPWRE4 is available at Aetrix Electronics and suitable for industrial backplane interfaces, embedded bus bridges, and automated test fixtures requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for SN74LVT245BPWRE4 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The SN74LVT245BPWRE4 belongs to TI's ABT logic family, engineered specifically for high-speed, mixed-voltage bus interfacing in mission-critical infrastructure where reliability, voltage translation, and hot-swap capability are mandatory.
FAQ
What is the maximum input voltage rating for SN74LVT245BPWRE4?
The SN74LVT245BPWRE4 supports input voltages up to 7 V on all A- and B-port pins, regardless of VCC level. This 5-V-tolerant capability allows direct interfacing with 5-V logic families while operating from a 3.3-V supply, eliminating external level-shifting circuitry in mixed-voltage systems.
Does SN74LVT245BPWRE4 support hot insertion, and how is it implemented?
Yes, SN74LVT245BPWRE4 supports hot insertion via two integrated features: Ioff circuitry disables outputs and blocks current backflow when VCC = 0, and power-up 3-state logic holds all outputs in high-impedance during supply ramp-up. These functions are validated per JESD78 Class II latch-up and JESD22 ESD standards.
What is the propagation delay of SN74LVT245BPWRE4 at 3.3 V supply?
The SN74LVT245BPWRE4 has a maximum propagation delay of 3.5 ns (tPLH and tPHL) at VCC = 3.3 V and CL = 50 pF. Typical values are 2.3 ns (tPLH) and 2.1 ns (tPHL), enabling reliable operation in systems with clock periods ≥ 7 ns - sufficient for 100-MHz bus timing budgets.
Can SN74LVT245BPWRE4 operate below 3.3 V, and what is the minimum functional supply?
Yes, SN74LVT245BPWRE4 is fully specified down to 2.7 V VCC. The recommended operating range is 2.7 V to 3.6 V, and all electrical characteristics-including VOL, VOH, and tPD-are guaranteed across this range, making it suitable for battery-powered equipment with discharge profiles extending below nominal 3.3 V.
What package type and dimensions does SN74LVT245BPWRE4 use?
SN74LVT245BPWRE4 uses the TSSOP-20 (PW) package: 6.5 mm × 4.4 mm body size, 0.65 mm lead pitch, 1.2 mm maximum height, and 20-pin configuration. Pin 1 is marked by a notch in the top-left corner; the package conforms to JEDEC MO-153 and TI's PW0020A outline.
SN74LVT245BPWRE4 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
SN74LVT245BPWRE4 FAQ
1.How can I place an order for SN74LVT245BPWRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVT245BPWRE4 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 SN74LVT245BPWRE4 reliable?
The price and inventory of SN74LVT245BPWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVT245BPWRE4 is usually 5 days.
3.What payment methods are accepted for SN74LVT245BPWRE4?
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4.How is shipping managed for SN74LVT245BPWRE4?
SN74LVT245BPWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVT245BPWRE4 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 SN74LVT245BPWRE4?
For technical support, including SN74LVT245BPWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVT245BPWRE4 requirements.
6.How does Aetrix verify that SN74LVT245BPWRE4 is sourced from the original manufacturer or authorized distributors?
All SN74LVT245BPWRE4 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 SN74LVT245BPWRE4 meets industry standards.
7.What is the process for return or replacement of SN74LVT245BPWRE4?
All SN74LVT245BPWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVT245BPWRE4, 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 SN74LVT245BPWRE4 part is unused and in its original packaging.
Return procedure for SN74LVT245BPWRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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