Texas Instruments SN74LVCH16652ADGG

Overview

SN74LVCH16652ADGG from Texas Instruments is a 16-bit bus transceiver and register with 3-state outputs, designed for 1.65-V to 3.6-V V_CC operation. It integrates dual 8-bit D-type flip-flop registers, complementary output-enable (OEAB/OEBA) and select-control (SAB/SBA) inputs, and bus-hold circuitry on all data inputs. It supports mixed-mode signal operation-accepting 5-V inputs while powered at 3.3 V-and enables real-time or stored data transfer between A and B buses in industrial control backplanes.

For engineers reviewing the SN74LVCH16652ADGG datasheet, SN74LVCH16652ADGG pinout, SN74LVCH16652ADGG application, or SN74LVCH16652ADGG equivalent, key selection criteria include its dual-register architecture, 3.3-V-compatible 5-V-tolerant I/O, live-insertion support via power-off output disable, and precise timing parameters (e.g., t_pd ≤ 6.4 ns at V_CC = 3.3 V).

Technical Context

The SN74LVCH16652ADGG implements two independent 8-bit transceiver/register blocks, each with dedicated clock (CLKAB/CLKBA), select (SAB/SBA), and output-enable (OEAB/OEBA) controls. Its EPIC™ submicron CMOS process delivers low ground bounce (V_OLP < 0.8 V) and overshoot (V_OHV > 2 V) at 3.3 V, enabling noise-resilient operation in dense PCB layouts.

Bus-hold circuitry eliminates external pullup/pulldown resistors on all A/B port inputs, while power-off output disable permits hot-swap capability. The device operates across –40°C to 85°C and supports simultaneous or staggered clocking depending on select-control state per the function table.

Key Specifications

Pinout & Package

SN74LVCH16652ADGG uses a 56-pin Thin Shrink Small-Outline (DGG) package with 0.5-mm pitch and 12.5-mm × 6.1-mm body size. Pin numbering follows standard top-view orientation with pin 1 marked by a dot or bevelled corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16652DGGR, SN74LVCH16652ADGG adds bus-hold and power-off disable-critical for unattended industrial systems-while 74ALVCH16652TTR trades higher ICC for sub-5-ns t_pd, making SN74LVCH16652ADGG the balanced choice for reliability-first 150-MHz applications.

Availability

SN74LVCH16652ADGG is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory-mapped I/O expansion, hot-swappable module hubs, and redundant data path controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVCH16652ADGG 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic devices, with over 90 years of innovation in industrial, automotive, and communications markets.

The SN74LVCH16652ADGG belongs to TI's Widebus™ family of high-speed, low-voltage bus interface ICs, engineered specifically for robust, mixed-voltage data routing in programmable logic controllers, test equipment, and modular instrumentation systems.

FAQ

What is the maximum clock frequency supported by SN74LVCH16652ADGG?

The SN74LVCH16652ADGG supports a maximum clock frequency of 150 MHz across its recommended operating range (V_CC = 2.7 V to 3.3 V). This is validated by timing parameters including t_w (minimum pulse width) of 3.3 ns and t_su/t_h (setup/hold) margins sufficient for synchronous operation at this rate. The device maintains this performance while retaining bus-hold functionality and 5-V-tolerant inputs.

Does SN74LVCH16652ADGG require external pull-up or pull-down resistors on its data lines?

No, SN74LVCH16652ADGG does not require external pull-up or pull-down resistors on its A1–A8 or B1–B8 data inputs because it integrates active bus-hold circuitry. This feature maintains unused or floating inputs at valid logic levels using ±75 µA hold current at 3.0 V, eliminating BOM cost and PCB space associated with 32 discrete resistors in typical 16-bit implementations.

Can SN74LVCH16652ADGG operate with a 5-V supply voltage?

No, SN74LVCH16652ADGG is rated for V_CC between 1.65 V and 3.6 V only. Applying 5 V to V_CC exceeds its absolute maximum rating and will cause permanent damage. However, its inputs tolerate up to 5.5 V, allowing connection to 5-V signal sources while powered at 3.3 V-a key feature for mixed-voltage system integration.

How does SN74LVCH16652ADGG handle power-up and power-down sequencing?

During power-up or power-down, SN74LVCH16652ADGG ensures high-impedance outputs by tying OEBA to V_CC via a pullup resistor and OEAB to GND via a pulldown resistor. This configuration guarantees isolation before V_CC stabilizes. Additionally, outputs automatically enter high-Z when V_CC = 0 V, enabling safe live insertion into powered backplanes without bus contention.

What is the thermal resistance (θ_JA) of the SN74LVCH16652ADGG in its DGG package?

The SN74LVCH16652ADGG in the DGG package has a junction-to-ambient thermal resistance (θ_JA) of 81°C/W, measured per JESD 51 standards. This value assumes standard JEDEC 2-layer board conditions and defines the maximum allowable power dissipation (e.g., ~150 mW at 50°C ambient rise) before thermal derating becomes necessary in continuous high-drive operation.