onsemi 74LVTH162244MTX

Overview

74LVTH162244MTX from ON Semiconductor is a low-voltage 16-bit non-inverting buffer/line driver with 3-STATE outputs, bushold inputs, and integrated 25 Ω series output resistors. It operates at 2.7–3.6 V VCC, delivers ±12 mA drive strength, supports 5V-tolerant I/O, and is packaged in a 48-pin TSSOP (MTD48) for memory address, clock, and bus interface applications in industrial embedded systems.

For engineers reviewing the 74LVTH162244MTX datasheet, pinout, applications, or equivalent options, key selection criteria include bushold input retention, 25 Ω on-die termination, nibble-level 3-STATE control, and compatibility with mixed 3.3V/5V signal environments.

Technical Context

The 74LVTH162244MTX implements four independent 4-bit groups (nibbles), each controlled by dedicated active-low OE pins (OE1–OE4), enabling flexible partial bus gating without external logic. Its bushold circuitry actively maintains input state when floating, eliminating pull-up resistors on unused data lines.

Each output integrates matched 25 Ω series resistance in both HIGH and LOW states-reducing overshoot/undershoot and obviating external termination resistors in point-to-point or lightly loaded stubbed bus topologies. The device uses advanced BiCMOS fabrication to achieve ABT-class speed (tPLH/tPHL ≤ 4.8 ns @ 3.3 V) while maintaining low ICCZ (0.19 mA) in 3-STATE mode.

Key Specifications

Pinout & Package

74LVTH162244MTX is housed in a 48-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1 mm wide, with 0.5 mm lead pitch. Thermal pad not present; standard surface-mount reflow compatible.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit buffer/line driver applications.

Compared with SN74LVC16244ADGGR and 74ALVT162244GRE4, the 74LVTH162244MTX uniquely combines bushold, 5 V tolerance, and on-die 25 Ω termination-reducing design complexity for mixed-voltage, space-constrained industrial interfaces.

Availability

74LVTH162244MTX is available at Aetrix Electronics and suitable for memory address drivers, clock distribution networks, and bus transceiver interfaces requiring stable component supply across extended industrial temperature ranges (−40 °C to +85 °C).

Supply support for 74LVTH162244MTX 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

ON Semiconductor (formerly Fairchild Semiconductor) is a global supplier of energy-efficient semiconductor solutions for automotive, industrial, cloud computing, and IoT applications.

The 74LVTH162244MTX belongs to ON Semiconductor's LVT/LVTH logic family-designed specifically for high-speed, low-power 3.3 V bus interfacing with backward compatibility to 5 V TTL systems.

FAQ

Is 74LVTH162244MTX still in production or recommended for new designs?

No-74LVTH162244MTX is discontinued and not recommended for new designs. ON Semiconductor explicitly labels it "DISCONTINUED" and advises contacting their representative for migration paths. However, Aetrix Electronics maintains limited legacy inventory for ongoing production support and repair of existing industrial equipment where redesign is impractical.

What does "bushold" mean for 74LVTH162244MTX inputs, and how does it affect system design?

Bushold circuitry in the 74LVTH162244MTX actively latches the last valid logic state on each input (I0–I15) when left floating, drawing only 75 µA minimum hold current. This eliminates the need for 16 external pull-up resistors-reducing BOM cost, PCB real estate, and potential noise coupling from resistor networks in dense layouts.

Can 74LVTH162244MTX safely interface between a 3.3 V microcontroller and a 5 V peripheral?

Yes-the 74LVTH162244MTX accepts input voltages up to 5.5 V while operating from a 2.7–3.6 V VCC supply, making it suitable for level translation. Its outputs swing rail-to-rail (VOL ≤ 0.2 V, VOH ≥ VCC − 0.2 V) and drive ±12 mA, directly driving 5 V TTL inputs without additional level shifters or resistive dividers.

How does the integrated 25 Ω series resistance in 74LVTH162244MTX improve signal integrity?

The 25 Ω equivalent series resistance in each 74LVTH162244MTX output acts as source termination, matching typical PCB trace impedance (50–75 Ω) in point-to-point configurations. This reduces signal reflections, overshoot, and undershoot-especially on traces >5 cm-eliminating two external 25 Ω resistors per line and lowering EMI emissions in noise-sensitive industrial environments.

What is the functional difference between OE1–OE4 on 74LVTH162244MTX, and how are they typically used?

OE1–OE4 are independent active-low enables controlling four 4-bit nibbles (I0–I3/O0–O3, I4–I7/O4–O7, etc.). They allow selective 3-STATE control-for example, disabling upper address bits during I/O-mapped access while keeping lower bits active for chip select decoding-enabling flexible bus segmentation without glue logic or FPGA resource overhead.