Renesas 74LVCH162245APAG

Overview

74LVCH162245APAG from Renesas Electronics (formerly IDT) is a 3.3V CMOS 16-bit bus transceiver with 5V-tolerant I/O, bus-hold, and dual-drive capability-featuring ±24mA drive on B-port and ±12mA on A-port. It operates across –40°C to +85°C and supports mixed-voltage 3.3V/5V system interfacing in asynchronous bidirectional data transfer applications.

For engineers reviewing the 74LVCH162245APAG datasheet, 74LVCH162245APAG pinout, 74LVCH162245APAG application, or 74LVCH162245APAG equivalent, key selection criteria include 5V-tolerant I/O compatibility, bus-hold functionality eliminating external pull resistors, asymmetric drive strength per port, industrial temperature operation, and TSSOP-48 package constraints.

Technical Context

This device implements two independent 8-bit transceiver sections (1A↔1B and 2A↔2B), each controlled by dedicated DIR and OE pins. Direction control is synchronous with data flow, while active-low OE overrides direction to place both ports in high-impedance state.

All inputs-including DIR and OE-feature hysteresis (100mV typical) for noise immunity, and all I/O pins support 5V signaling regardless of VCC (2.7V–3.6V). The A-port includes integrated series resistors to reduce line noise under light loads; the B-port uses high-drive circuitry optimized for moderate-to-heavy capacitive loads up to 50pF.

Key Specifications

Pinout & Package

74LVCH162245APAG is housed in a 48-pin Thin Shrink Small Outline Package (TSSOP), 0.5mm pitch, body width 6.1mm, compliant with JEDEC MO-153AC. Pin 1 marked via dot; thermal pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVCH162245APAG, SN74LVC162245ADGGR removes bus-hold to reduce complexity and cost, while 74ALVC162245PAG retains bus-hold but achieves lower leakage-making the latter preferable for energy-constrained designs where input state retention remains essential.

Availability

74LVCH162245APAG is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and automotive body electronics requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 74LVCH162245APAG 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

Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT applications.

The 74LVCH162245APAG belongs to Renesas' legacy IDT logic family, engineered for robust mixed-voltage system interfacing in harsh industrial and telecom environments with emphasis on noise immunity, reliability, and ease of integration.

FAQ

What is the maximum operating voltage on I/O pins of the 74LVCH162245APAG?

The 74LVCH162245APAG supports I/O terminal voltages from –0.5V to +6.5V relative to GND, enabling safe interfacing with 5V logic families even when VCC is 3.3V. This 5V tolerance applies to all I/O pins-including DIR and OE-and is validated per absolute maximum ratings, not just DC characteristics. The 74LVCH162245APAG maintains functional operation across its full industrial temperature range under these conditions.

Does the 74LVCH162245APAG require external pull-up or pull-down resistors on unused inputs?

No, the 74LVCH162245APAG does not require external pull resistors on unused inputs because all A-side I/O pins (1A1–1A8, 2A1–2A8) feature integrated bus-hold circuitry. This function sustains the last valid logic state with ±75μA hold current at VCC = 3V, preventing floating inputs and associated noise susceptibility. The 74LVCH162245APAG's bus-hold eliminates BOM items and layout area typically needed for passive biasing.

How does the asymmetric drive strength between A-port and B-port benefit system design?

The 74LVCH162245APAG's A-port delivers ±12mA with built-in series resistance to dampen reflections on lightly loaded stubs, while the B-port provides ±24mA for driving heavier loads like long traces or multiple receivers. This asymmetry allows designers to assign noise-sensitive, short-run connections to the A-port and high-capacitance paths to the B-port-optimizing signal integrity without external termination. The 74LVCH162245APAG thus supports mixed-load topologies within a single device.

Can the 74LVCH162245APAG be used in hot-swap applications?

Yes, the 74LVCH162245APAG supports hot-swap operation due to its bus-hold functionality on A-side I/O, 5V-tolerant inputs, and robust ESD protection (>2000V HBM, >200V MM). When a card is inserted mid-operation, floating A-port pins retain their prior state, preventing glitches on shared buses. The 74LVCH162245APAG also features power-off leakage limits (±50μA) that prevent back-driving during partial power-up sequences.

What is the significance of the 100mV input hysteresis specified for the 74LVCH162245APAG?

The 100mV typical input hysteresis on all control inputs (DIR, OE) and A-side I/O of the 74LVCH162245APAG increases noise immunity by creating distinct HIGH and LOW thresholds-reducing susceptibility to ground bounce, crosstalk, or EMI-induced false triggering. This hysteresis is especially valuable in industrial settings with motor drives or switching power supplies. The 74LVCH162245APAG's hysteresis is inherent to its input structure and requires no external components to achieve.