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NXP Semiconductors 74LVT2245D,112
- Part No.:
- 74LVT2245D,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74LVT2245D,112.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:982
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Product details
Overview
74LVT2245D,112 from Nexperia is a 3.3 V octal bidirectional transceiver with integrated 30 Ω output termination resistors, 3-state outputs, bus hold inputs, and overvoltage-tolerant inputs up to 5.5 V. It operates across 2.7 V–3.6 V supply, delivers ±12 mA drive, and supports high-speed data transfer between TTL-level buses in backplane or hot-swap applications.
For engineers reviewing the 74LVT2245D,112 datasheet, 74LVT2245D,112 pinout, 74LVT2245D,112 application, or 74LVT2245D,112 equivalent, key selection criteria include its 30 Ω on-die termination, bus hold functionality eliminating external pull-ups, 3.2 ns typical propagation delay at 3.3 V, and IOFF partial power-down capability for live insertion.
Technical Context
This BiCMOS transceiver implements dual 8-bit bidirectional data paths (A↔B) controlled by DIR (direction) and OE (output enable). The DIR input selects data flow direction per channel, while OE places all outputs in high-impedance state independently of DIR.
Each I/O pin features bus hold circuitry (IBHL/IBHH ≥75 μA), overvoltage tolerance to 5.5 V, and IOFF protection enabling safe operation during partial power-down. Propagation delays are specified from 1.0 ns (tPLH/tPHL typ) to 7.0 ns (tPZH max) across temperature and voltage ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 3.6 V - Enables direct interface with 3.3 V logic systems without level shifters. |
| Output Drive | ±12 mA - Sustains signal integrity driving 50 Ω transmission lines or multiple TTL loads. |
| Propagation Delay | 1.0–4.6 ns (tPLH/tPHL typ @ 3.3 V) - Supports >200 MHz data rates in point-to-point bus interfaces. |
| Input Voltage Range | 0 V to 5.5 V - Allows mixed-voltage system interfacing (e.g., 3.3 V device driving 5 V bus). |
| Termination Resistor | 30 Ω - On-die series termination minimizes reflections on PCB traces without external components. |
| Bus Hold Current | ±75 μA (IBHL/IBHH) - Maintains defined logic state on floating inputs, removing need for external pull-ups. |
| IOFF Leakage | ±100 μA @ VCC = 0 V - Prevents back-driving powered-down sections during hot insertion. |
Pinout & Package
74LVT2245D,112 is housed in a plastic small outline package (SO20, SOT163-1) with 20 leads and 7.5 mm body width. Pin 1 is marked by a notch or dot; pin numbering follows standard SOIC convention counterclockwise from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | High = A→B data flow; Low = B→A; determines active path for each transceiver channel. |
| 2–9 (A0–A7) | Port A data I/O | Bidirectional data pins connected to local bus or microcontroller side; feature bus hold. |
| 10 (GND) | Ground reference | 0 V return path for all internal circuits and I/O; must be low-impedance connection. |
| 11–18 (B0–B7) | Port B data I/O | Bidirectional data pins connected to remote bus or peripheral side; tolerate 5.5 V inputs. |
| 19 (OE) | Output enable input | High = all outputs forced to high-impedance; enables bus sharing and isolation. |
| 20 (VCC) | Power supply | 3.3 V nominal supply; decoupling capacitor required within 1 cm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 30 Ω termination | Eliminates external series resistors on each output, reducing BOM count and PCB area. |
| Bus hold inputs | Maintains valid logic state on unused A/B pins without external pull-up/down resistors. |
| Overvoltage tolerant inputs | Accepts 5.5 V signals while powered from 3.3 V, enabling interoperability with legacy 5 V systems. |
| IOFF partial power-down | Blocks current flow when VCC = 0 V, supporting hot-plug capability in modular backplanes. |
| TTL-compatible switching levels | Direct interface with standard TTL logic without level translation or additional drivers. |
Applications
| Backplane Data Routing | Hot-Swappable Module Interface |
|---|---|
Use Scenario: Bidirectional data transfer between CPU and peripheral modules across a shared 3.3 V backplane. IC Role / Device Role / Timing Role: Octal transceiver managing A↔B port arbitration with DIR/OE control and 30 Ω line matching. Use Value: On-die termination ensures clean signal edges at 100+ MHz; bus hold prevents floating inputs during module removal. |
Use Scenario: Interfacing field-replaceable I/O cards to a powered-backplane controller. IC Role / Device Role / Timing Role: Isolating unpowered card-side signals using IOFF and OE-controlled 3-state outputs. Use Value: IOFF leakage <±100 μA prevents back-powering; 5.5 V input tolerance allows card presence detection via 5 V sense lines. |
| Legacy System Bus Bridging | TTL-Level Microcontroller Expansion |
Use Scenario: Connecting modern 3.3 V FPGA I/O banks to legacy 5 V TTL data buses. IC Role / Device Role / Timing Role: Level-translating transceiver with overvoltage-tolerant B-side inputs and 3.3 V A-side outputs. Use Value: Eliminates discrete level shifters; ±12 mA drive sustains signal integrity into 5 V TTL fan-out loads. |
Use Scenario: Expanding GPIO count of an ARM Cortex-M microcontroller via parallel bus. IC Role / Device Role / Timing Role: Bidirectional data buffer between MCU port and external SRAM/peripheral with DIR-controlled flow. Use Value: 3.2 ns typical tPLH enables 200+ MHz burst transfers; bus hold maintains state during MCU reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVTH2245D,112 | Higher drive strength (+16 mA/−16 mA), improved noise immunity, identical pinout and function. | Preferred where higher capacitive load drive or enhanced ESD robustness (HBM >3 kV) is required. | Select when system demands greater output margin or operates in electrically noisy environments. |
| SN74LVC245APWR | No integrated termination; 24 mA drive; 1.65–3.6 V supply; no bus hold; 5 V tolerant inputs only when VCC ≥ 2.3 V. | Suitable for cost-sensitive designs where external termination is acceptable and bus hold not needed. | Choose if BOM simplification via on-die termination is unnecessary and wider VCC range is critical. |
Compared with 74LVT2245D,112, the 74LVTH2245D,112 offers higher drive and better noise margins but same footprint, while SN74LVC245APWR trades termination and bus hold for broader supply range and lower cost-requiring external design compensation.
Availability
74LVT2245D,112 is available at Aetrix Electronics and suitable for backplane routing, hot-swap module interfaces, and legacy TTL bus bridging requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 74LVT2245D,112 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 delivering high-performance logic, analog, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for industrial and computing applications.
The 74LVT/LVTH2245 belongs to Nexperia's advanced LVT logic family, engineered for high-speed, low-noise bidirectional data transfer in 3.3 V systems with integrated signal integrity features.
FAQ
What is the maximum clock/data rate supported by 74LVT2245D,112?
The device achieves 1.0 ns typical propagation delay (tPLH/tPHL) at 3.3 V, enabling reliable operation at data rates exceeding 200 MHz in point-to-point configurations. Actual maximum rate depends on trace length, load capacitance, and termination matching-verified via IBIS simulation or board-level timing analysis.
Can 74LVT2245D,112 interface directly with a 5 V microcontroller?
Yes-the B-side inputs tolerate up to 5.5 V regardless of VCC, allowing direct connection to 5 V outputs. However, A-side outputs swing only to VCC (3.3 V), so 5 V receivers must be overvoltage-tolerant or use external level-shifting for full bidirectional compatibility.
Does 74LVT2245D,112 require external pull-up resistors on unused inputs?
No-integrated bus hold circuitry (IBHL/IBHH ≥75 μA) actively maintains the last-valid logic state on all A and B pins, eliminating the need for external pull-up or pull-down resistors on floating inputs.
How does the 30 Ω termination resistor improve signal integrity?
The on-die 30 Ω series resistor matches typical PCB trace impedance (50–75 Ω) when combined with load capacitance, reducing signal reflections and overshoot/undershoot. This improves eye diagram margin and allows longer trace runs without external termination components.
74LVT2245D,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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:
- 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
74LVT2245D,112 FAQ
1.How can I place an order for 74LVT2245D,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT2245D,112 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 74LVT2245D,112 reliable?
The price and inventory of 74LVT2245D,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT2245D,112 is usually 5 days.
3.What payment methods are accepted for 74LVT2245D,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT2245D,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVT2245D,112?
74LVT2245D,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT2245D,112 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 74LVT2245D,112?
For technical support, including 74LVT2245D,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT2245D,112 requirements.
6.How does Aetrix verify that 74LVT2245D,112 is sourced from the original manufacturer or authorized distributors?
All 74LVT2245D,112 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 74LVT2245D,112 meets industry standards.
7.What is the process for return or replacement of 74LVT2245D,112?
All 74LVT2245D,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT2245D,112, 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 74LVT2245D,112 part is unused and in its original packaging.
Return procedure for 74LVT2245D,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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