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NXP Semiconductors 74LVT245BD,112
- Part No.:
- 74LVT245BD,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74LVT245BD,112.pdf
- Description:
- IC TRANSCVR TRI-ST 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:15,143
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Product details
Overview
74LVT245BD,112 from Nexperia is an octal 3-state bidirectional transceiver with direction (DIR) and output enable (OE) control pins, operating at 3.3 V nominal supply. It features bus-hold inputs eliminating external pull-ups, overvoltage-tolerant inputs up to 5.5 V, ±64 mA/–32 mA output drive, and supports hot insertion in mixed-voltage backplane or memory interface applications.
For engineers reviewing the 74LVT245BD,112 datasheet, 74LVT245BD,112 pinout, 74LVT245BD,112 application, or 74LVT245BD,112 equivalent, key selection criteria include 3.3 V operation with 5 V-tolerant I/O, propagation delay ≤3.5 ns at 3.3 V, bus-hold functionality, thermal-enhanced SO20 package, and JEDEC JESD8C compliance for industrial temperature range (–40 °C to +85 °C).
Technical Context
The 74LVT245BD,112 implements a BiCMOS octal transceiver architecture with independent DIR and OE logic control: DIR selects data flow direction (A→B or B→A), while OE (active LOW) places outputs in high-impedance state. Its IOFF circuitry ensures power-down isolation, and bus-hold inputs maintain valid logic states on unused pins without external biasing.
It operates within 2.7 V to 3.6 V supply range, tolerates input voltages up to 5.5 V regardless of VCC, and delivers TTL-compatible output levels. Propagation delays are specified down to 1.2 ns (typical) for both A↔B paths, with 3-state transition times (tPZH/tPLZ) as low as 2.2 ns (typical), enabling high-speed bus arbitration in synchronous digital systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 3.6 V - Ensures compatibility with 3.3 V logic domains while allowing margin for rail variation. |
| Input Voltage Tolerance | Up to 5.5 V - Enables direct interfacing with 5 V buses without level-shifting circuitry. |
| Output Drive | +64 mA / –32 mA - Supports driving heavy capacitive loads and fan-out to multiple CMOS/TTL inputs. |
| Propagation Delay | ≤3.5 ns (max) at VCC = 3.3 V - Guarantees sub-4 ns timing for high-frequency address/data bus transfers. |
| Bus-Hold Current | ±75 μA to ±150 μA - Maintains stable logic states on floating inputs, eliminating need for external pull resistors. |
| Operating Temperature | –40 °C to +85 °C - Qualified for industrial-grade embedded and communications equipment environments. |
| ESD Protection | HBM >2000 V, MM >200 V - Provides robust handling during board assembly and field service. |
Pinout & Package
74LVT245BD,112 is packaged in SO20 (SOT163-1): plastic small outline, 20-pin, 7.5 mm body width, with standard gull-wing leads and pin 1 index marker.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DIR | Direction control input: HIGH enables B→A data flow; LOW enables A→B flow. |
| 2–9 | A0–A7 | Port A data I/O: bidirectional interface for one bus segment (e.g., microprocessor local bus). |
| 10 | GND | Ground reference (0 V) for all internal circuitry and signal return path. |
| 11–18 | B0–B7 | Port B data I/O: bidirectional interface for second bus segment (e.g., peripheral or memory bus). |
| 19 | OE | Output enable (active LOW): disables both ports into high-impedance state for bus sharing. |
| 20 | VCC | Positive supply input (2.7–3.6 V): powers internal BiCMOS logic and output drivers. |
Key Features
| Feature | Design Value |
|---|---|
| Overvoltage-tolerant inputs | Withstands up to 5.5 V regardless of VCC level - eliminates level shifters when interfacing 5 V peripherals. |
| Bus-hold inputs | Self-biasing on A0–A7 and B0–B7 pins - prevents floating inputs and removes requirement for 10 kΩ pull-up/down resistors. |
| IOFF partial power-down | Outputs remain high-impedance and leakage < ±100 μA when VCC = 0 V - safe for live insertion/extraction. |
| High-speed BiCMOS design | Typical tPLH/tPHL = 2.4 ns at 3.3 V - meets timing budgets for 100+ MHz bus clocking with margin. |
| Latch-up immunity | Exceeds 500 mA per JEDEC Std 17 - ensures robustness against transient current faults in noisy environments. |
Applications
| Memory Interface Bus Extension | Microcontroller Peripheral Expansion |
|---|---|
Use Scenario: Extending a 32-bit microcontroller data bus to off-chip SRAM or Flash memory operating at same voltage domain. IC Role / Device Role / Timing Role: Bidirectional data transceiver buffering address/data lines between MCU and memory, with DIR synchronized to RD/WR strobes. Use Value: Enables clean signal integrity across 10+ cm traces, supports 100 MHz burst transfers via sub-4 ns propagation delay and 64 mA drive. |
Use Scenario: Connecting an FPGA I/O bank to legacy 5 V parallel peripherals (e.g., LCD controller, ADC/DAC) in mixed-voltage system. IC Role / Device Role / Timing Role: Level-translating bidirectional interface with 5.5 V-tolerant inputs and 3.3 V outputs, controlled by FPGA GPIO for DIR/OE. Use Value: Eliminates discrete level-shifters; bus-hold maintains valid states during FPGA configuration gaps, reducing BOM count by ≥3 components. |
| Hot-Swappable Backplane Interface | Industrial PLC I/O Module Isolation |
Use Scenario: Adding/removing daughter cards in a 3U CompactPCI or VMEbus chassis without powering down main controller. IC Role / Device Role / Timing Role: Isolating data lanes between backplane and module using OE-controlled 3-state outputs; DIR set statically per card function. Use Value: IOFF and live-insertion support prevent bus contention during card insertion; ESD rating >2000 V HBM withstands handling discharge events. |
Use Scenario: Interfacing isolated 24 V digital I/O channels to a 3.3 V ARM-based PLC CPU via optocoupler-isolated bus. IC Role / Device Role / Timing Role: Buffering and direction-controlling serial or parallel status/control signals between isolation barrier and CPU bus. Use Value: Bus-hold prevents metastability on unconnected I/O lines post-isolation; wide temp range (–40 °C to +85 °C) ensures reliability in cabinet-mounted enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bidirectional transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245APWR | Lower drive (+32 mA/–32 mA), narrower VCC range (1.65–3.6 V), no bus-hold, 5 V-tolerant inputs only when VCC ≥ 2.3 V. | Suitable for cost-sensitive consumer designs where 5 V tolerance is conditional and bus-hold not required. | Select if lower power consumption and smaller TSSOP package are prioritized over robust 5.5 V tolerance and bus-hold. |
| 74ALVC245MTCX | Same 2.7–3.6 V range and 5.5 V-tolerant inputs, but lacks bus-hold and has higher typical propagation delay (4.2 ns). | Fits legacy ALVC-based systems requiring pin-for-pin replacement without redesigning input bias networks. | Choose only when replacing existing ALVC245 and bus-hold is implemented externally via resistors. |
Compared with SN74LVC245APWR and 74ALVC245MTCX, the 74LVT245BD,112 uniquely combines unconditional 5.5 V input tolerance, integrated bus-hold, and higher drive strength-making it optimal for industrial backplanes and mixed-voltage expansion where reliability and reduced external components are critical.
Availability
74LVT245BD,112 is available at Aetrix Electronics and suitable for memory interface extension, microcontroller peripheral bridging, hot-swappable backplane interconnect, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVT245BD,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 optimized for efficiency, reliability, and miniaturization in industrial, automotive, and computing applications.
The 74LVT series targets high-speed, low-voltage bus interface applications requiring robust noise immunity, mixed-voltage interoperability, and industrial temperature operation-designed specifically for backplane, memory, and processor interconnect use cases.
FAQ
What is the maximum input voltage the 74LVT245BD,112 can tolerate on its I/O pins?
The device accepts input voltages up to +7.0 V absolute maximum, but its guaranteed overvoltage-tolerant operation is specified to +5.5 V regardless of VCC level. This allows safe interfacing with 5 V buses even when powered from 3.3 V, without external clamping or level-shifting circuitry.
Does the 74LVT245BD,112 require external pull-up resistors on unused inputs?
No. The device integrates bus-hold circuitry on all A0–A7 and B0–B7 pins, providing active feedback to retain the last valid logic state. This eliminates the need for external pull-up or pull-down resistors, reducing BOM count and PCB area in systems with partially utilized data buses.
Can the 74LVT245BD,112 be used in hot-swap applications?
Yes. It supports live insertion and extraction due to IOFF circuitry that disables outputs and limits power-off leakage to ±100 μA when VCC = 0 V. Combined with latch-up immunity exceeding 500 mA, this ensures safe operation during card replacement in modular chassis systems.
What is the typical propagation delay for data transfer between ports?
At VCC = 3.3 V and Tamb = 25 °C, typical propagation delay is 2.4 ns for both LOW-to-HIGH (tPLH) and HIGH-to-LOW (tPHL) transitions across A↔B paths. Maximum delay is 3.5 ns under worst-case conditions, supporting reliable operation in 100+ MHz synchronous bus environments.
74LVT245BD,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:
- 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-SO
74LVT245BD,112 FAQ
1.How can I place an order for 74LVT245BD,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT245BD,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 74LVT245BD,112 reliable?
The price and inventory of 74LVT245BD,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT245BD,112 is usually 5 days.
3.What payment methods are accepted for 74LVT245BD,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT245BD,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVT245BD,112?
74LVT245BD,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT245BD,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 74LVT245BD,112?
For technical support, including 74LVT245BD,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT245BD,112 requirements.
6.How does Aetrix verify that 74LVT245BD,112 is sourced from the original manufacturer or authorized distributors?
All 74LVT245BD,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 74LVT245BD,112 meets industry standards.
7.What is the process for return or replacement of 74LVT245BD,112?
All 74LVT245BD,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT245BD,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 74LVT245BD,112 part is unused and in its original packaging.
Return procedure for 74LVT245BD,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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