My Inquiry
My Account
Texas Instruments SN74LVTH2245NSRE4
- Part No.:
- SN74LVTH2245NSRE4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74LVTH2245NSRE4.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,723
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVTH2245NSRE4 from Texas Instruments is an octal bus transceiver designed for 3.3-V VCC operation with mixed-mode 5-V input/output compatibility, supporting asynchronous bidirectional data transfer between A and B buses. It features bus-hold circuitry, Ioff-enabled hot insertion, 22-Ω integrated series resistors on B-port outputs, and operates from 2.7 V to 3.6 V. It is used in voltage-level translation between 3.3-V logic and legacy 5-V systems in industrial control backplanes.
For engineers reviewing the SN74LVTH2245NSRE4 datasheet, SN74LVTH2245NSRE4 pinout, SN74LVTH2245NSRE4 application, or SN74LVTH2245NSRE4 equivalent, key selection considerations include its 20-pin SSOP package, ±100 µA Ioff current at VCC = 0 V, 12 mA B-port drive capability, and support for unregulated battery operation down to 2.7 V.
Technical Context
This device implements a dual-supply-tolerant transceiver architecture with independent direction (DIR) and output-enable (OE) controls. Its A-port accepts TTL-level inputs up to 5.5 V while operating from a 3.3-V supply, and B-port outputs include built-in 22-Ω series termination to suppress overshoot/undershoot without external components.
The integrated bus-hold circuit maintains unused data inputs at valid logic levels, eliminating external pullup/pulldown resistors. Power-up 3-state and Ioff functionality ensure high-impedance outputs during power sequencing and prevent backflow current when powered down-critical for hot-plug applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - supports unregulated battery rails and low-noise 3.3-V system supplies |
| IOH/IOL (B port) | −12 mA / +12 mA - sufficient to drive standard TTL loads without external buffering |
| tPLH/tPHL (A→B) | 1.1 ns to 5.1 ns at VCC = 3.3 V - enables sub-5-ns propagation for high-speed bus arbitration |
| VI (Input Voltage) | Up to 5.5 V - allows direct interface to 5-V CMOS/TTL signal sources without level shifters |
| Ioff (VCC = 0 V) | ±100 µA - prevents damaging back-current during hot insertion or partial power-down |
| Bus-Hold Current | ±75 µA at VCC = 3 V - actively holds floating inputs without external resistors or board space |
| VOL (A port, IOL = 64 mA) | 0.55 V max - ensures robust low-level noise margin under full load |
Pinout & Package
SN74LVTH2245NSRE4 is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65-mm lead pitch, 7.4-mm body width, and 2.0-mm maximum height per JEDEC MO-150. The package is RoHS-compliant, lead-finished with NiPdAu, and rated MSL-1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | A1–A8 inputs/outputs | Noninverting data terminals for A-bus side; tolerate 5-V inputs while powered by 3.3-V VCC |
| 11, 12, 13, 14, 15, 16, 17, 18 | B1–B8 outputs/inputs | B-port drivers include 22-Ω series resistance; sink/source up to 12 mA each |
| 9 | DIR | Direction control: low = B→A, high = A→B; TTL-compatible threshold (VIL = 0.8 V, VIH = 2 V) |
| 10 | OE | Active-low output enable; drives all A/B ports into high-Z when high; supports power-up 3-state |
| 20 | VCC | 3.3-V supply input; must be stabilized within 2.7–3.6 V; decoupling required near pin |
| 19 | GND | Signal ground reference for all I/O and internal logic; separate return path recommended |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5-V tolerant inputs/outputs with 3.3-V VCC enables seamless interfacing between legacy and modern logic families |
| Integrated 22-Ω B-port series resistors | Eliminates need for eight discrete termination resistors, reducing BOM count and PCB layout complexity |
| Bus-hold circuitry | Actively maintains logic state on unused A/B data lines, preventing metastability without external biasing |
| Ioff and power-up 3-state | Guarantees high-impedance outputs during power transitions, enabling safe hot-insertion in modular backplanes |
| Latch-up immunity | Exceeds 500 mA per JESD 17 - ensures robustness against transient-induced latch-up in noisy industrial environments |
Applications
| Industrial Backplane Interface | Legacy System Upgrades |
|---|---|
|
Use Scenario: Interfacing a new 3.3-V FPGA-based controller to an existing 5-V PLC I/O module via shared parallel bus. IC Role / Device Role / Timing Role: Bidirectional voltage translator and bus isolator, controlled by FPGA GPIOs for DIR and OE. Use Value: Eliminates discrete level-shifter ICs and pull-up networks, reducing component count by ≥12 parts per interface channel. |
Use Scenario: Retrofitting a 5-V microcontroller subsystem with a 3.3-V ADC while preserving original bus wiring. IC Role / Device Role / Timing Role: Asynchronous data bridge with configurable direction; DIR tied to ADC RD# signal. Use Value: Maintains timing integrity with <5.1 ns A→B propagation delay, avoiding redesign of critical setup/hold margins. |
| Hot-Swappable Module Card | Battery-Powered Data Logger |
|
Use Scenario: Modular sensor card inserted into a powered 3.3-V carrier board while system remains operational. IC Role / Device Role / Timing Role: Isolation buffer with Ioff protection and power-up 3-state to prevent bus contention during insertion. Use Value: Enables zero-downtime field upgrades; no risk of backfeed damage due to ±100 µA Ioff at VCC = 0 V. |
Use Scenario: Low-power environmental monitor using alkaline batteries that discharge from 4.5 V to 2.7 V over life. IC Role / Device Role / Timing Role: Level-translating interface between 3.3-V MCU and 5-V serial EEPROM, operating across full VCC range. Use Value: Supports full functionality down to 2.7 V VCC without brown-out reset or interface failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC2245APWRE4 | Lower drive strength (24 mA A-port, 12 mA B-port); no bus-hold; 1.65–3.6 V VCC range | Lacks integrated bus-hold and 5-V input tolerance; requires external pullups on floating lines | Select when cost sensitivity outweighs need for bus-hold and 5-V compatibility |
| SN74AVC2245RGYR | Higher speed (tPD ≤ 2.8 ns), 1.2–3.6 V VCC, no 5-V tolerance, no bus-hold | Designed for ultra-low-voltage mobile interfaces; incompatible with 5-V signal sources | Choose only for sub-1.8-V systems where 5-V tolerance is irrelevant |
Compared with SN74LVTH2245NSRE4, SN74LVC2245APWRE4 reduces cost but sacrifices 5-V input support and bus-hold; SN74AVC2245RGYR improves speed and voltage flexibility but removes both 5-V tolerance and bus-hold-making SN74LVTH2245NSRE4 uniquely suited for mixed-voltage industrial retrofits requiring zero external biasing.
Availability
SN74LVTH2245NSRE4 is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy system upgrades, hot-swappable module cards, and battery-powered data loggers requiring stable component supply across extended temperature ranges (−40°C to 85°C).
Supply support for SN74LVTH2245NSRE4 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 decades of expertise in industrial-grade interface ICs and broad portfolio support.
SN74LVTH2245NSRE4 belongs to TI's LVTH logic family, engineered specifically for robust mixed-voltage communication in harsh environments-emphasizing hot-insertion safety, wide VCC tolerance, and elimination of external bias components.
FAQ
What is the maximum input voltage rating for SN74LVTH2245NSRE4?
The SN74LVTH2245NSRE4 supports input voltages up to 5.5 V on all A- and B-port pins, regardless of VCC level. This 5-V tolerance enables direct connection to legacy TTL or CMOS signal sources without external level-shifting circuitry, and is explicitly specified in the Absolute Maximum Ratings table of the SCBS707E datasheet.
Does SN74LVTH2245NSRE4 require external pullup resistors on unused data lines?
No. SN74LVTH2245NSRE4 integrates active bus-hold circuitry on all A- and B-port data inputs, maintaining floating lines at valid logic levels without external components. Using pullup or pulldown resistors with enabled bus-hold is explicitly discouraged in the datasheet to avoid conflict and excessive current draw.
Can SN74LVTH2245NSRE4 operate reliably at 2.7 V VCC?
Yes. SN74LVTH2245NSRE4 is fully specified from 2.7 V to 3.6 V VCC, including guaranteed switching performance (e.g., tPLH ≤ 5.3 ns at VCC = 2.7 V), output drive (IOL = 64 mA min on A port), and bus-hold functionality. This makes it suitable for battery-powered applications with declining supply voltage.
What is the purpose of the 22-Ω series resistance on the B-port outputs of SN74LVTH2245NSRE4?
The 22-Ω series resistance integrated into each B-port output of SN74LVTH2245NSRE4 reduces signal overshoot and undershoot on transmission lines, minimizing EMI and improving signal integrity without requiring external termination resistors. This feature simplifies PCB layout and lowers BOM cost for point-to-point or short-bus connections.
How does SN74LVTH2245NSRE4 support hot insertion in live backplane systems?
SN74LVTH2245NSRE4 supports hot insertion via two complementary features: Ioff circuitry limits current to ±100 µA when VCC = 0 V, preventing backflow into powered circuitry; and power-up 3-state forces outputs into high-impedance during power ramp-up, eliminating bus contention. Both are validated per JESD 78 and JESD 17 standards.
SN74LVTH2245NSRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVTH
- Package/Case:
- 20-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-SO
SN74LVTH2245NSRE4 FAQ
1.How can I place an order for SN74LVTH2245NSRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVTH2245NSRE4 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 SN74LVTH2245NSRE4 reliable?
The price and inventory of SN74LVTH2245NSRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH2245NSRE4 is usually 5 days.
3.What payment methods are accepted for SN74LVTH2245NSRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVTH2245NSRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVTH2245NSRE4?
SN74LVTH2245NSRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVTH2245NSRE4 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 SN74LVTH2245NSRE4?
For technical support, including SN74LVTH2245NSRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH2245NSRE4 requirements.
6.How does Aetrix verify that SN74LVTH2245NSRE4 is sourced from the original manufacturer or authorized distributors?
All SN74LVTH2245NSRE4 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 SN74LVTH2245NSRE4 meets industry standards.
7.What is the process for return or replacement of SN74LVTH2245NSRE4?
All SN74LVTH2245NSRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH2245NSRE4, 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 SN74LVTH2245NSRE4 part is unused and in its original packaging.
Return procedure for SN74LVTH2245NSRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVTH2245NSRE4 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…
