Nexperia USA Inc. 74LVT245BDB,118

Overview

74LVT245BDB,118 from Nexperia is a 3.3 V octal bidirectional transceiver with 3-state outputs, direction control (DIR), and output enable (OE). It provides level-shifting bus interface between 3.3 V logic domains and 5 V-tolerant inputs, supports ±64 mA/–32 mA drive strength, operates from –40 °C to +85 °C, and features bus-hold inputs eliminating external pull-ups. It is used in high-speed data path isolation between microcontroller peripherals and legacy parallel buses.

For engineers reviewing the 74LVT245BDB,118 datasheet, 74LVT245BDB,118 pinout, 74LVT245BDB,118 application, or 74LVT245BDB,118 equivalent, key selection criteria include 3-state timing (tPZH ≤ 5.5 ns), overvoltage-tolerant inputs (up to 5.5 V), IOFF power-down capability, BiCMOS output drive, and SO20 package compatibility with legacy PCB footprints.

Technical Context

The device implements an octal bidirectional data path controlled by DIR (active-HIGH for A→B, active-LOW for B→A) and OE (active-LOW to enable outputs). Its BiCMOS architecture delivers TTL-compatible input thresholds and rail-to-rail output swing under 3.3 V supply.

IOFF circuitry ensures near-zero leakage (< ±100 μA) when VCC = 0 V, enabling live insertion/extraction. Bus-hold inputs maintain valid logic states on unused pins without external resistors, with IBHL = 75–150 μA at VI = 0.8 V and IBHH = –150 to –75 μA at VI = 2.0 V.

Key Specifications

Pinout & Package

74LVT245BDB,118 is supplied in SO20 (SOT163-1) package: plastic small outline, 20 leads, 7.5 mm body width, 1.27 mm lead pitch, with gull-wing leads and pin 1 index marker.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal bidirectional transceiver applications.

Compared with SN74LVC245APWR and 74ALVC245MTCX, the 74LVT245BDB,118 uniquely combines 5.5 V input tolerance, ±64 mA drive, bus-hold, and IOFF in SO20 - making it the only choice for industrial backplanes requiring mixed-voltage interoperability, hot-swap, and high-fanout without external components.

Availability

74LVT245BDB,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded memory expansion subsystems, and automated test fixture control requiring stable component supply, long-lifecycle availability, and guaranteed SO20 footprint compatibility.

Supply support for 74LVT245BDB,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 delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and manufacturability in industrial and consumer applications.

The 74LVT series targets high-speed, 3.3 V–compatible bus interface applications requiring robust mixed-voltage operation, live insertion, and low-power 3-state control - specifically engineered for industrial control and instrumentation systems.

FAQ

What is the maximum input voltage the 74LVT245BDB,118 can tolerate on its data and control pins?

The device accepts input voltages from –0.5 V to +5.5 V on all pins (A0–A7, B0–B7, DIR, OE), independent of VCC. This overvoltage tolerance enables direct connection to 5 V TTL buses without external level-shifting circuitry, verified per datasheet Table 4 limiting values and functional description.

Does the 74LVT245BDB,118 support hot-plug operation, and what features enable it?

Yes - hot-plug is enabled by two integrated features: IOFF circuitry limits power-off leakage to < ±100 μA when VCC = 0 V, and bus-hold inputs maintain defined logic states on floating pins without external resistors. These are confirmed in Sections 2 (Features) and 5.2 (Pin Description) of the Nexperia datasheet Rev. 3.

How does the bus-hold function behave electrically, and what current levels sustain it?

Bus-hold actively drives unused inputs toward the last valid logic state: IBHL = 75–150 μA at VI = 0.8 V (LOW hold) and IBHH = –150 to –75 μA at VI = 2.0 V (HIGH hold), measured at VCC = 3.0 V per Table 6. This eliminates need for external pull-ups while ensuring noise immunity above 0.4 V noise margin.

What is the worst-case 3-state disable timing, and under what conditions is it specified?

The maximum disable time is tPHZ = 5.9 ns and tPLZ = 5.0 ns, measured at VCC = 3.3 V ± 0.3 V, Tamb = –40 °C to +85 °C, with RL = 500 Ω and CL = 50 pF per Table 7 and Fig. 6. This ensures rapid bus release to prevent contention during direction or enable transitions in high-frequency parallel interfaces.