Texas Instruments SN74LVCH16245ADL

Overview

SN74LVCH16245ADL from Texas Instruments is a 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 1.65-V to 3.6-V buses. It supports mixed-mode signal operation (5.5-V-tolerant inputs at 3.3-V VCC), delivers 4-ns max propagation delay at 3.3 V, and features Ioff for live insertion and partial-power-down protection. It is used in tablet memory expansion interfaces requiring level translation and bus isolation.

For engineers reviewing the SN74LVCH16245ADL datasheet, SN74LVCH16245ADL pinout, SN74LVCH16245ADL application, or SN74LVCH16245ADL equivalent, key selection criteria include its 48-pin SSOP package, dual 8-bit directional control (1DIR/2DIR), independent output enables (1OE/2OE), and bus-hold circuitry eliminating external pull resistors.

Technical Context

The SN74LVCH16245ADL implements two independent 8-bit transceiver sections, each with dedicated direction (DIR) and output-enable (OE) controls. Its CMOS input structure accepts voltages up to 5.5 V regardless of VCC (1.65–3.6 V), enabling robust level translation in mixed-voltage systems.

Active bus-hold circuitry maintains valid logic states on undriven A- and B-port inputs without external components, while the Ioff feature disables outputs and blocks current backflow when VCC = 0 V-critical for hot-swap and power sequencing in embedded systems.

Key Specifications

Pinout & Package

SN74LVCH16245ADL uses a 48-pin SSOP (DL) package measuring 15.88 mm × 7.49 mm, optimized for space-constrained industrial and portable applications. Pin assignments follow TI's standard dual-octal transceiver layout with mirrored A/B port groups and dedicated control pins per section.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16245ADL and SN74AVC16245DGGR, the SN74LVCH16245ADL uniquely combines 5.5-V input tolerance, bus-hold, and Ioff in a single 48-pin SSOP package-making it the only option for robust, mixed-voltage, hot-pluggable bus expansion in industrial and portable platforms.

Availability

SN74LVCH16245ADL is available at Aetrix Electronics and suitable for electronic points of sale, test and measurement equipment, wearable health devices, and tablets requiring stable component supply across long production lifecycles.

Supply support for SN74LVCH16245ADL 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 connectivity technologies for industrial, automotive, and consumer markets.

The SN74LVCH16245ADL belongs to TI's Widebus™ family of advanced bus interface ICs, engineered specifically for high-reliability, mixed-voltage data routing in portable and modular electronics.

FAQ

What is the maximum operating temperature range for the SN74LVCH16245ADL?

The SN74LVCH16245ADL is rated for operation from –40°C to +125°C ambient temperature, meeting industrial-grade thermal requirements. This specification is validated per JEDEC JESD78 and confirmed in the device's Recommended Operating Conditions table (Section 7.3 of SCES495C). The 125°C upper limit applies across the full 1.65–3.6-V VCC range and ensures reliable performance in enclosed, fanless environments such as medical wearables and ruggedized POS terminals.

Does the SN74LVCH16245ADL support true 5-V to 3.3-V level translation?

Yes, the SN74LVCH16245ADL supports true 5-V to 3.3-V level translation: its inputs tolerate up to 5.5 V regardless of VCC (1.65–3.6 V), and its outputs swing rail-to-rail within the VCC domain. When VCC = 3.3 V, the device accepts 5-V logic signals on A or B ports and drives 3.3-V-compatible loads-enabling direct connection to legacy 5-V peripherals without external translators. This capability is explicitly verified in Section 9.3 ("Feature Description") and Table 7.3 of the datasheet.

How does the bus-hold feature function on the SN74LVCH16245ADL?

The bus-hold circuitry on the SN74LVCH16245ADL actively maintains the last-valid logic state on any undriven A- or B-port input, with hold currents ranging from ±15 µA to ±75 µA depending on input voltage and VCC. It operates independently of OE and DIR states, remains active during power-up/down, and eliminates the need for external pullup/pulldown resistors. This behavior is documented in Sections 1 ("Features"), 3 ("Description"), and 9.1 ("Overview") of SCES495C, and is intrinsic to the LVCH process technology.

Can the SN74LVCH16245ADL be used in hot-swap applications?

Yes, the SN74LVCH16245ADL supports hot-swap applications via its Ioff feature: when VCC = 0 V, the outputs are disabled and leakage current is limited to ±10 µA, preventing damaging back-current from live backplanes or powered subsystems. This is validated per JEDEC JESD78 and specified in Section 7.5 ("Electrical Characteristics"). To ensure safe operation, OE should be tied to VCC through a pullup resistor during power-up, as recommended in Section 9.1.

What is the pin-compatible replacement for SN74LVCH16245ADL in TSSOP package?

The SN74LVCH16245ADGGR is the pin-compatible TSSOP (DGG) variant of the SN74LVCH16245ADL, sharing identical pinout, electrical specifications, and functional behavior. Both devices use the same 48-pin footprint and support identical VCC range, timing, and I/O characteristics. The only differences are package dimensions (TSSOP: 12.50 mm × 6.10 mm vs. SSOP: 15.88 mm × 7.49 mm) and packaging format (tape-and-reel vs. tube). This equivalence is confirmed in TI's Package Option Addendum and Section 6 ("Pin Configuration") of SCES495C.