NXP Semiconductors 74LVT16652ADGG,118

Overview

74LVT16652ADGG,118 from Nexperia is a 3.3 V, 16-bit dual-bus transceiver/register with real-time and stored-data transfer modes, 56-pin TSSOP package, ±32 mA output drive, and bus-hold inputs eliminating external pull-ups. It serves in high-speed bidirectional data routing between 3.3 V and 5 V buses in telecom backplanes and industrial control I/O modules.

For engineers reviewing the 74LVT16652ADGG,118 datasheet, 74LVT16652ADGG,118 pinout, 74LVT16652ADGG,118 application, or 74LVT16652ADGG,118 equivalent, key selection criteria include propagation delay (2.1 ns typ), 3-state output enable timing (2.6 ns typ), bus-hold current (±135 µA), and compatibility with mixed-voltage 5 V-tolerant I/O systems.

Technical Context

The 74LVT16652ADGG,118 implements two independent 8-bit transceiver channels-each with separate A-to-B and B-to-A clock (CPAB/CPBA), select (SAB/SBA), and output enable (OEAB/OEBA) controls-enabling concurrent or staggered register loading. Its BiCMOS architecture supports TTL-level switching and 5 V input tolerance at 3.3 V supply.

Real-time transfer occurs when SAB/SBA = LOW; stored-data transfer activates when SAB/SBA = HIGH, with glitch-free transition logic. Data latching on CPAB/CPBA rising edges is unconditional-occurring regardless of OE or S states-and bus-hold circuitry maintains last valid logic level on unused I/O pins without external resistors.

Key Specifications

Pinout & Package

Package: TSSOP56 (SOT364-1), 56-lead plastic thin shrink small outline package, 6.1 mm body width, 0.5 mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit bus transceiver/register applications.

Compared with SN74LVC16652DGGR and 74ALVCH16652TTR, the 74LVT16652ADGG,118 uniquely combines 5 V-tolerant inputs, bus-hold functionality, and ±32 mA drive in a single 56-pin TSSOP-making it the only option requiring no external components for robust mixed-voltage bus interfacing.

Availability

74LVT16652ADGG,118 is available at Aetrix Electronics and suitable for telecom backplane interfaces, industrial I/O modules, and high-speed memory interposers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 74LVT16652ADGG,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 leader in discrete, logic, and PowerMOS semiconductors, spun off from NXP's Standard Products division in 2017 and focused on automotive, industrial, computing, and consumer markets.

The 74LVT16652ADGG,118 belongs to Nexperia's high-performance LVT logic family, engineered for low-latency, mixed-voltage bidirectional bus interfacing in systems demanding reliability, live insertion capability, and minimal external component count.

FAQ

What is the maximum clock frequency supported by the 74LVT16652ADGG,118?

The 74LVT16652ADGG,118 supports a maximum clock frequency of 180 MHz typical at VCC = 3.3 V ± 0.3 V, as specified in Table 8 of the datasheet. This enables high-throughput register loading in synchronous bus architectures. The minimum guaranteed fmax is 150 MHz across the full −40 °C to +85 °C operating range. Clock pulse width requirements (tW(H) ≥ 2.2 ns, tW(L) ≥ 2.4 ns) must be met to ensure reliable edge-triggered latching in the 74LVT16652ADGG,118.

Does the 74LVT16652ADGG,118 support live insertion and extraction?

Yes, the 74LVT16652ADGG,118 supports live insertion and extraction per its documented features. It incorporates power-up 3-state and power-up reset behavior that forces all outputs into high-impedance before VCC stabilizes, preventing bus contention during hot-swap events. This capability is validated in the original Philips/Nexperia datasheet Section 2 and confirmed by its JESD78 latch-up rating (>500 mA) and MIL-STD-883 ESD robustness (>2000 V HBM), making the 74LVT16652ADGG,118 suitable for modular telecom and industrial backplane applications.

How does bus-hold functionality work on the 74LVT16652ADGG,118?

The 74LVT16652ADGG,118 integrates bus-hold circuitry on all A- and B-side I/O pins, providing ±135 µA overdrive current (at VI = 0.8 V or 2.0 V) to retain the last valid logic state when inputs float. This eliminates the need for external pull-up or pull-down resistors-reducing BOM cost and PCB area. Bus-hold operates independently of OE, S, or CP states and remains active even during power-up sequences, ensuring deterministic I/O levels before firmware initialization. This feature is explicitly specified in Table 7 under IHOLD for the 74LVT16652ADGG,118.

Can the 74LVT16652ADGG,118 interface directly with 5 V logic systems?

Yes, the 74LVT16652ADGG,118 accepts input voltages up to 5.5 V while operating at VCC = 3.3 V, enabling direct connection to 5 V buses without level shifters. Its I/O pins are 5 V-tolerant, and the output high-state draws zero current when tied to a 5 V rail-preventing unintended loading. This capability is confirmed in Table 6 (VI max = 5.5 V) and Table 5 (VO max = 7.0 V) of the datasheet, and is a defining characteristic of the LVT family used in the 74LVT16652ADGG,118.

What is the purpose of the complementary OEAB and OEBA pins on the 74LVT16652ADGG,118?

The 74LVT16652ADGG,118 uses separate OEAB (A-to-B output enable) and OEBA (B-to-A output enable) pins to provide independent 3-state control for each data direction-allowing simultaneous bidirectional communication or selective isolation. Both are active-LOW inputs; asserting OEAB = LOW enables A→B outputs, while OEBA = LOW enables B→A outputs. This design permits flexible bus arbitration, such as holding one direction while transferring data in the other, and is essential for implementing non-blocking interconnect topologies in the 74LVT16652ADGG,118.