Texas Instruments SN74LVCZ16245ADL

Overview

SN74LVCZ16245ADL from Texas Instruments is a 16-bit noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 2.7-V to 3.6-V buses. It supports mixed-mode signaling (5-V inputs with 3.3-V V_CC), delivers 3.7-ns max propagation delay at 3.3 V, and features I_off and power-up 3-state for hot-insertion in backplane or modular systems.

For engineers reviewing the SN74LVCZ16245ADL datasheet, SN74LVCZ16245ADL pinout, SN74LVCZ16245ADL application, or SN74LVCZ16245ADL equivalent, key selection criteria include its dual-octal configuration, 48-pin SSOP (DL) package, ±24-mA drive strength at 3 V, 5.5-V tolerant inputs, and guaranteed high-impedance state during power ramping.

Technical Context

This device implements two independent 8-bit transceiver sections-each with dedicated direction (DIR) and output-enable (OE) controls-enabling flexible A↔B or B↔A data flow without external logic. Its I_off circuitry actively disables outputs when V_CC = 0, preventing back-current during hot-swap events.

The SN74LVCZ16245ADL operates across –40°C to 85°C with supply voltage strictly bounded at 2.7 V–3.6 V, while input pins tolerate up to 5.5 V regardless of V_CC. Its latch-up immunity exceeds 100 mA per JESD 78 Class II, and ESD protection meets 2000-V HBM and 1000-V CDM standards.

Key Specifications

Pinout & Package

SN74LVCZ16245ADL uses a 48-pin SSOP (DL) package with 0.5-mm pitch, 12.4-mm × 6.1-mm body, and 1.2-mm max height per JEDEC MO-153. Pin 1 is located at top-left corner with notch marking orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16245A, the SN74LVCZ16245ADL adds certified hot-swap readiness via I_off and power-up 3-state-critical for modular infrastructure-while 74ALVC16245 trades 5-V tolerance for lower-voltage flexibility, making it unsuitable as a drop-in replacement in mixed-signal environments.

Availability

SN74LVCZ16245ADL is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory expansion subsystems, hot-swappable communication modules, and test equipment signal routing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVCZ16245ADL 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, with over 50 years of innovation in industrial, automotive, and communications markets.

The SN74LVCZ16245ADL belongs to TI's Widebus™ family of high-speed logic devices, engineered specifically for robust, low-latency bidirectional data transfer in mixed-voltage, hot-pluggable system architectures.

FAQ

What is the maximum clock frequency supported by SN74LVCZ16245ADL in a 16-bit bus configuration?

The SN74LVCZ16245ADL does not contain an internal clock; it is an asynchronous transceiver. Its 3.7-ns max propagation delay at 3.3 V supports reliable data transfer up to approximately 270 MHz under ideal conditions (CL = 50 pF, minimal trace length). Actual usable frequency depends on board layout, load capacitance, and timing margins dictated by the controlling logic-not the SN74LVCZ16245ADL itself.

Can SN74LVCZ16245ADL safely interface a 5-V microcontroller with a 3.3-V FPGA?

Yes. The SN74LVCZ16245ADL accepts input voltages up to 5.5 V while operating from a 3.3-V V_CC, making it ideal for translating signals from 5-V microcontrollers to 3.3-V FPGAs. Its outputs swing rail-to-rail (0 V to V_CC), so FPGA inputs receive clean 0–3.3-V logic levels. No external level shifters are required when using SN74LVCZ16245ADL in this configuration.

Does SN74LVCZ16245ADL require external pull-up resistors on OE or DIR pins?

No external pull-ups are required for functional operation, but TI recommends tying OE to V_CC via a pull-up resistor (value determined by driver sink capability) to guarantee high-impedance state when V_CC is above 1.5 V. DIR may be driven directly from CMOS logic. Leaving either pin floating violates recommended operating conditions and risks undefined output states in the SN74LVCZ16245ADL.

Is SN74LVCZ16245ADL RoHS compliant and lead-free?

Yes. SN74LVCZ16245ADL is RoHS compliant with lead finish/NiPdAu (NIPDAU) plating and qualifies as Level-1-260°C-UNLIM per JEDEC J-STD-020 moisture sensitivity standard. Its SSOP (DL) package contains no lead-based solder or hazardous substances exceeding EU RoHS Directive limits, and full compliance documentation is available from Texas Instruments' official product page.

How does the I_off feature of SN74LVCZ16245ADL protect the system during hot insertion?

The I_off circuitry in SN74LVCZ16245ADL automatically disables all outputs when V_CC drops below ~1.5 V, preventing reverse current from flowing through powered downstream buses into the unpowered SN74LVCZ16245ADL. This eliminates risk of damage to adjacent components and avoids bus contention-making SN74LVCZ16245ADL safe for live insertion into fully operational backplanes or carrier cards.