My Inquiry
My Account
Texas Instruments SN74LVTH2245DGVR
- Part No.:
- SN74LVTH2245DGVR
- Manufacturer:
- Texas Instruments
- Package:
- 20-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVTH2245DGVR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVTH2245DGVR from Texas Instruments is an octal bus transceiver IC designed for 3.3-V VCC operation with mixed-mode 5-V input/output tolerance, enabling TTL-level interfacing between 3.3-V and 5-V data buses. It features direction control (DIR), output enable (OE), bus-hold circuitry, and integrated 22-Ω B-port series resistors-supporting hot insertion in industrial backplane and legacy interface applications.
For engineers reviewing the SN74LVTH2245DGVR datasheet, SN74LVTH2245DGVR pinout, SN74LVTH2245DGVR application, or SN74LVTH2245DGVR equivalent, key selection criteria include its 20-pin TVSOP package, ±12 mA B-port drive capability, Ioff/power-up 3-state support, and 2.7–3.6 V supply range for battery-backed or unregulated systems.
Technical Context
This device implements asynchronous bidirectional data transfer between two 8-bit buses using a single DIR signal to select A→B or B→A flow, while OE independently places both ports into high-impedance isolation. Its dual-voltage I/O architecture allows direct connection to 5-V logic without level shifters.
The integrated bus-hold circuitry maintains valid logic states on floating A/B inputs without external pull resistors, and the B-port's built-in 22-Ω series termination reduces overshoot/undershoot-eliminating discrete termination components in point-to-point or stubbed bus topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - supports unregulated battery operation down to 2.7 V with stable logic thresholds. |
| IOL (B port) | 12 mA - sufficient to drive standard TTL loads without external buffers or current-limiting resistors. |
| tPLH/tPHL (A↔B) | Typ. 3.5 ns at VCC = 3.3 V - enables high-speed communication in 33-MHz synchronous bus environments. |
| Input Voltage Range | −0.5 V to 7 V - accepts 5-V TTL inputs safely while powered from 3.3-V supply, eliminating external level translation. |
| Bus-Hold Current | ±75 µA at VCC = 3 V - actively holds unused inputs at valid logic levels, removing need for external pullup/pulldown networks. |
| Ioff | ±100 µA at VCC = 0 - prevents damaging backflow current during hot insertion or partial power-down scenarios. |
| θJA | 92°C/W - thermal performance validated for TVSOP (DGV) package in standard PCB layouts with 2 oz copper. |
Pinout & Package
SN74LVTH2245DGVR is housed in a 20-pin Thin Very Small Outline Package (TVSOP), JEDEC MO-153 compliant, with 0.5-mm lead pitch, 3.5-mm body width, and 1.2-mm maximum height-optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | A-port data inputs/outputs | Bidirectional I/O pins for first 8-bit bus; driven by internal transceivers controlled by DIR and OE. |
| 9 | GND | Ground reference for all internal circuitry and I/O signaling; requires low-inductance connection to system ground plane. |
| 10, 11, 12, 13, 14, 15, 16, 17 | B-port data inputs/outputs | Bidirectional I/O pins for second 8-bit bus; feature integrated 22-Ω series resistance to dampen edge-induced ringing. |
| 18 | VCC | 3.3-V supply input; must be decoupled with ≥0.1 µF ceramic capacitor placed within 3 mm of pin. |
| 19 | OE | Active-low output enable; drives both A and B ports into high-impedance when high, enabling bus isolation. |
| 20 | DIR | Direction control; low = B→A data flow, high = A→B data flow-synchronizes with OE for glitch-free bus switching. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode I/O | 5-V tolerant inputs/outputs operating from 3.3-V VCC-enables seamless interconnection between legacy 5-V and modern low-voltage subsystems. |
| Integrated B-port termination | 22-Ω series resistance per B-port output-reduces EMI and eliminates need for external series resistors in point-to-point links. |
| Hot-insertion support | Ioff and power-up 3-state circuitry-prevents backdrive current and bus contention during live board insertion or partial power cycling. |
| Bus-hold circuitry | Active hold on all A/B data inputs-maintains last-valid state on floating lines, removing external pull resistors and reducing BOM count. |
| Output ground bounce suppression | VOLP < 0.8 V at VCC = 3.3 V-minimizes noise coupling into sensitive analog sections during high-current switching events. |
Applications
| Industrial Backplane Interface | Legacy System Bus Bridge |
|---|---|
|
Use Scenario: Interfacing a 3.3-V FPGA-based controller to a 5-V ISA-compatible peripheral bus in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional level-translating transceiver managing data flow direction via FPGA-controlled DIR and OE signals. Use Value: Eliminates discrete level shifters and pull resistors, reducing component count and layout area while maintaining signal integrity at 25-MHz burst rates. |
Use Scenario: Connecting a modern 3.3-V microcontroller to aging 5-V RS-232 or parallel printer interfaces in medical diagnostic equipment. IC Role / Device Role / Timing Role: Asynchronous bus translator isolating voltage domains and preventing damage during hot-plug cable insertion. Use Value: Ioff protection and bus-hold functionality ensure safe operation during cable swaps without system reset or firmware intervention. |
| Automotive Body Control Module | Test Equipment Signal Conditioning |
|
Use Scenario: Isolating and translating signals between a 3.3-V CAN microcontroller and 5-V sensor interface circuits in vehicle door modules. IC Role / Device Role / Timing Role: Direction-controlled data conduit supporting bidirectional diagnostics and configuration over shared harness wiring. Use Value: 2.7–3.6 V operation accommodates automotive battery droop; integrated termination improves EMC robustness in noisy under-hood environments. |
Use Scenario: Buffering and conditioning digital stimulus/response signals between a 3.3-V ATE controller and 5-V DUTs in automated test fixtures. IC Role / Device Role / Timing Role: High-speed, low-glitch bus isolator enabling precise timing control during functional test sequences. Use Value: Sub-4 ns propagation delay and <0.8 V ground bounce ensure accurate edge placement and minimize false triggering in high-reliability test 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 |
|---|---|---|---|
| SN74LVC245APW | Lower drive strength (24 mA A-port, 24 mA B-port); no integrated B-port series resistors; no bus-hold. | Requires external termination and pull resistors; suitable only where board space permits added passives. | Select when cost sensitivity outweighs integration benefits and system layout allows discrete components. |
| SN74AVC245DGVR | Supports 1.2–3.6 V VCC; higher speed (tPD typ. 2.2 ns); no bus-hold; lower Ioff (±10 µA). | Designed for ultra-low-voltage mobile interfaces; lacks bus-hold and hot-insertion robustness for industrial use. | Prefer for battery-powered portable devices needing wider VCC range and faster timing, not for legacy bus bridging. |
Compared with SN74LVC245APW and SN74AVC245DGVR, the SN74LVTH2245DGVR uniquely combines 5-V-tolerant I/O, integrated B-port termination, bus-hold, and Ioff-enabled hot insertion-making it the only choice for robust, component-minimized 3.3-V/5-V bus bridging in industrial and automotive contexts.
Availability
SN74LVTH2245DGVR is available at Aetrix Electronics and suitable for industrial backplane interfaces, automotive body control modules, legacy system bus bridges, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVTH2245DGVR 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 industrial, automotive, and communications markets.
The SN74LVTH2245DGVR belongs to TI's LVTH logic family, engineered specifically for mixed-voltage system interoperability-delivering robust 3.3-V/5-V bus translation with integrated protection and termination for demanding industrial and automotive applications.
FAQ
What is the maximum recommended operating temperature for SN74LVTH2245DGVR?
The SN74LVTH2245DGVR is rated for operation from −40°C to +85°C ambient temperature. This industrial-grade range ensures reliable performance in harsh environments such as factory automation controllers and automotive body modules, where thermal cycling and extended temperature exposure are common design constraints.
Does SN74LVTH2245DGVR require external pull-up resistors on its data inputs?
No. The SN74LVTH2245DGVR includes active bus-hold circuitry on all A- and B-port data inputs, which maintains valid logic states on floating lines without external pull-up or pull-down resistors-reducing BOM count and PCB footprint while improving noise immunity in unterminated bus segments.
Can SN74LVTH2245DGVR safely interface with 5-V microcontrollers while powered from a 3.3-V supply?
Yes. The SN74LVTH2245DGVR supports 5-V input and output voltage tolerance while operating from a 3.3-V VCC, allowing direct connection to 5-V TTL logic without external level shifters-enabling clean, low-latency communication between mixed-voltage subsystems in industrial and legacy computing applications.
What is the purpose of the 22-Ω series resistance on the B-port outputs of SN74LVTH2245DGVR?
The 22-Ω series resistance on each B-port output of the SN74LVTH2245DGVR damps signal edge-induced overshoot and undershoot, reducing EMI and improving signal integrity on unterminated or stubbed traces-eliminating the need for external series termination resistors and simplifying layout in point-to-point or lightly loaded bus configurations.
How does SN74LVTH2245DGVR support hot insertion in backplane applications?
The SN74LVTH2245DGVR supports hot insertion through dual mechanisms: Ioff circuitry disables outputs when VCC = 0, preventing backflow current, and power-up 3-state ensures outputs remain high-impedance during power ramp-up-avoiding bus contention and protecting live backplanes during live card replacement in telecom and industrial rack systems.
SN74LVTH2245DGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVTH
- Package/Case:
- 20-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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; 12mA, 12mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TVSOP
SN74LVTH2245DGVR FAQ
1.How can I place an order for SN74LVTH2245DGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVTH2245DGVR 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 SN74LVTH2245DGVR reliable?
The price and inventory of SN74LVTH2245DGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH2245DGVR is usually 5 days.
3.What payment methods are accepted for SN74LVTH2245DGVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVTH2245DGVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVTH2245DGVR?
SN74LVTH2245DGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVTH2245DGVR 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 SN74LVTH2245DGVR?
For technical support, including SN74LVTH2245DGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH2245DGVR requirements.
6.How does Aetrix verify that SN74LVTH2245DGVR is sourced from the original manufacturer or authorized distributors?
All SN74LVTH2245DGVR 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 SN74LVTH2245DGVR meets industry standards.
7.What is the process for return or replacement of SN74LVTH2245DGVR?
All SN74LVTH2245DGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH2245DGVR, 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 SN74LVTH2245DGVR part is unused and in its original packaging.
Return procedure for SN74LVTH2245DGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVTH2245DGVR Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
