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Nexperia USA Inc. 74LVTH2245DB,118
- Part No.:
- 74LVTH2245DB,118
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74LVTH2245DB,118.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,458
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Product details
Overview
74LVTH2245DB,118 from Nexperia is an octal 3-state bidirectional transceiver with integrated 30 Ω output termination resistors, designed for 3.3 V bus interface applications. It features direction control (DIR), output enable (OE), bus hold inputs, and overvoltage-tolerant inputs up to 5.5 V. Used in high-speed backplane and motherboard data routing where signal integrity and stub elimination are critical.
For engineers reviewing the 74LVTH2245DB,118 datasheet, 74LVTH2245DB,118 pinout, 74LVTH2245DB,118 application, or 74LVTH2245DB,118 equivalent, this device supports TTL-level interfacing, live insertion, and 2.7 V–3.6 V supply operation - key selection criteria for industrial control backplanes and legacy-to-3.3 V bus bridging.
Technical Context
This transceiver implements a BiCMOS architecture enabling ±12 mA drive strength while maintaining TTL-compatible input thresholds and 5.5 V overvoltage tolerance on all I/O pins. Its bus hold circuitry actively maintains logic states on unused inputs without external pull-ups.
The DIR and OE controls operate independently: DIR selects data flow direction (A→B or B→A), while OE places all outputs in high-impedance state regardless of DIR. Propagation delays are specified down to 1.0 ns (typ) at 3.3 V, supporting >100 MHz bus operation under loaded conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 3.6 V - ensures compatibility with 3.3 V systems while accommodating rail tolerance and noise margins |
| Output Drive | ±12 mA - sufficient to drive 50 Ω transmission lines directly without external termination |
| Propagation Delay | 1.0–4.6 ns (typ) - enables reliable operation in high-speed parallel buses up to 100+ MHz |
| Input Voltage Range | 0 V to 5.5 V - allows direct connection to 5 V TTL logic without level shifters |
| Bus Hold Current | ±75 μA to ±150 μA - maintains stable logic states on floating inputs, eliminating need for external biasing |
| Termination Resistors | 30 Ω (integrated) - matches typical PCB trace impedance to reduce reflections in short-haul backplane links |
| IOFF Leakage | ±100 μA at VCC = 0 V - prevents current backflow during partial power-down, protecting powered sections |
Pinout & Package
74LVTH2245DB,118 is packaged in SO20 (SOT163-1), a plastic small outline package with 20 leads and 7.5 mm body width. Pin 1 is marked by a beveled corner or index notch; pin numbering follows standard counter-clockwise convention from pin 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DIR | Direction control input: HIGH enables B→A data flow; LOW enables A→B |
| 2–9 | A0–A7 | Port A bidirectional I/Os - connect to local bus or controller side |
| 10 | GND | Ground reference for all internal circuitry and I/O return paths |
| 11–18 | B0–B7 | Port B bidirectional I/Os - connect to remote bus or peripheral side |
| 19 | OE | Active-low output enable: HIGH forces all A/B pins into high-impedance state |
| 20 | VCC | Primary power supply input (2.7–3.6 V); decoupling capacitor required near pin |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 30 Ω termination | Eliminates need for 16 discrete SMT resistors on board, reducing layout area and BOM count |
| Bus hold inputs | Maintains defined logic state on unconnected A/B pins, preventing metastability and EMI from floating nodes |
| Overvoltage-tolerant I/O | Withstands 5.5 V inputs while powered from 3.3 V, enabling safe interfacing with mixed-voltage systems |
| Live insertion support | IOFF circuitry blocks current flow when VCC = 0 V, allowing hot-swap into powered backplanes |
| Power-up 3-state | Outputs remain in high-impedance until VCC stabilizes above 1.2 V, preventing bus contention at power-on |
Applications
| Backplane Data Routing | Industrial PLC I/O Expansion |
|---|---|
Use Scenario: Bidirectional data transfer between CPU module and peripheral carrier card in modular rack systems. IC Role / Device Role / Timing Role: Bus transceiver managing timing-critical address/data strobes across 200 mm backplane traces. Use Value: Integrated 30 Ω termination suppresses ringing on long traces; bus hold prevents glitches during hot-swap events. |
Use Scenario: Interfacing 3.3 V FPGA-based controller with legacy 5 V digital I/O modules in factory automation. IC Role / Device Role / Timing Role: Level-shifting transceiver handling parallel status/control words with sub-5 ns propagation delay. Use Value: 5.5 V-tolerant inputs accept 5 V signals directly; ±12 mA drive ensures robust noise margin on noisy plant-floor wiring. |
| Embedded Memory Interface Bridging | Test Equipment Signal Conditioning |
Use Scenario: Isolating and buffering DDR2 command/address bus between SoC and memory daughterboard in test instrumentation. IC Role / Device Role / Timing Role: Direction-controlled buffer synchronizing control signals with minimal skew across dual-port memory access. Use Value: DIR-controlled flow eliminates need for separate read/write direction logic; low tPLH/tPHL preserves setup/hold timing. |
Use Scenario: Driving multiple DUT channels from a single pattern generator in automated test fixtures. IC Role / Device Role / Timing Role: Fan-out transceiver distributing synchronized digital stimulus with matched edge rates. Use Value: Matched 30 Ω output impedance minimizes reflections across parallel 50 Ω coaxial loads; fast enable/disable supports burst-mode testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVT2245D,118 | Lacks integrated 30 Ω termination resistors; requires external 33 Ω resistors per line | Suitable only when board space permits discrete termination or when lower cost outweighs layout simplification | Select if termination is already implemented externally or if tighter thermal budget requires lower power dissipation |
| SN74LVC245APWR | CMOS-only process; no bus hold; 24 mA drive; 1.65–3.6 V supply; no overvoltage tolerance | Requires external pull-ups on unused inputs; incompatible with 5 V inputs unless clamped | Choose only for pure 3.3 V systems with full I/O control and no mixed-voltage interaction |
Compared with 74LVTH2245DB,118, the 74LVT2245D,118 reduces component count only if termination is omitted, while SN74LVC245APWR trades robustness for lower static power but loses critical 5 V tolerance and bus hold - making the 74LVTH2245DB,118 uniquely suited for rugged, mixed-signal backplane interfaces.
Availability
74LVTH2245DB,118 is available at Aetrix Electronics and suitable for industrial backplane routing, PLC I/O expansion, and embedded memory interface bridging requiring stable component supply across multi-year production cycles.
Supply support for 74LVTH2245DB,118 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74LVTH series targets high-speed, robust bus interface applications in industrial control and communications infrastructure, emphasizing signal integrity, mixed-voltage interoperability, and system-level reliability.
FAQ
What is the function of the DIR pin on the 74LVTH2245DB,118?
The DIR (direction) pin controls data flow direction between Port A and Port B. When DIR is LOW, data passes from A to B; when DIR is HIGH, data flows from B to A. This bidirectional control operates independently of OE, allowing dynamic reversal of bus traffic without disabling outputs.
Can the 74LVTH2245DB,118 safely interface with 5 V logic inputs?
Yes - all I/O pins are overvoltage tolerant up to 5.5 V, meaning they accept 5 V TTL input signals while operating from a 3.3 V supply. No external level shifters or clamping diodes are required, and the internal protection circuitry limits input current to safe levels per JEDEC standards.
How does the bus hold feature eliminate external pull-up resistors?
The bus hold circuit actively senses the last valid logic state on each A/B input and applies ±75–150 μA feedback current to maintain that state. This holds floating inputs at defined HIGH or LOW levels, preventing oscillation, EMI, and undefined logic states - removing the need for discrete pull-up or pull-down resistors.
Is the 74LVTH2245DB,118 suitable for hot-swap applications?
Yes - its IOFF circuitry ensures negligible leakage current (< ±100 μA) when VCC = 0 V, allowing safe insertion or removal from a live backplane. Combined with power-up 3-state behavior, this prevents bus contention and signal corruption during live maintenance operations.
74LVTH2245DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVTH
- Package/Case:
- 20-SSOP (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:
- 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-SSOP
74LVTH2245DB,118 FAQ
1.How can I place an order for 74LVTH2245DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVTH2245DB,118 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 74LVTH2245DB,118 reliable?
The price and inventory of 74LVTH2245DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVTH2245DB,118 is usually 5 days.
3.What payment methods are accepted for 74LVTH2245DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVTH2245DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVTH2245DB,118?
74LVTH2245DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVTH2245DB,118 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 74LVTH2245DB,118?
For technical support, including 74LVTH2245DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVTH2245DB,118 requirements.
6.How does Aetrix verify that 74LVTH2245DB,118 is sourced from the original manufacturer or authorized distributors?
All 74LVTH2245DB,118 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 74LVTH2245DB,118 meets industry standards.
7.What is the process for return or replacement of 74LVTH2245DB,118?
All 74LVTH2245DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVTH2245DB,118, 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 74LVTH2245DB,118 part is unused and in its original packaging.
Return procedure for 74LVTH2245DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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