Texas Instruments SN74LVCZ16244ADL

Overview

SN74LVCZ16244ADL from Texas Instruments is a 16-bit noninverting buffer/driver with 3-state outputs, designed for 2.7 V to 3.6 V V_CC operation. It supports mixed-mode signal operation (5-V inputs with 3.3-V V_CC), delivers ≤4.1 ns propagation delay at 3.3 V, and features I_off and power-up 3-state for hot-insertion in memory address, clock, and bus driver applications.

For engineers reviewing the SN74LVCZ16244ADL datasheet, SN74LVCZ16244ADL pinout, SN74LVCZ16244ADL application, or SN74LVCZ16244ADL equivalent, key selection criteria include 48-pin SSOP (DL) package compatibility, 3.3-V system-level translation capability, high-density 16-bit bus driving, and guaranteed hot-swap robustness via I_off and controlled power-up 3-state behavior.

Technical Context

This device implements four independent 4-bit noninverting buffers, each with dedicated output-enable (OE) control. All inputs tolerate up to 5.5 V regardless of V_CC, enabling bidirectional level translation between 3.3-V logic domains and legacy 5-V peripherals without external components.

The I_off circuitry actively disables outputs when V_CC = 0 V, preventing back-drive current, while power-up 3-state ensures outputs remain high-impedance until V_CC exceeds 1.5 V - critical for live insertion into powered backplanes or modular systems.

Key Specifications

Pinout & Package

SN74LVCZ16244ADL uses a 48-pin SSOP (DL) package with 0.5-mm pitch, 12.4 mm × 6.2 mm body size, and 1.2-mm max height - optimized for space-constrained industrial PCBs requiring thermal performance (θ_JA = 63°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit 3-state buffer applications.

Compared with SN74LVC16244ADL and 74ALVC16244DL, SN74LVCZ16244ADL uniquely combines 5-V input tolerance, guaranteed I_off, and sub-4.2 ns speed - making it the only option qualified for hot-pluggable 3.3-V/5-V bus interfaces in telecom and industrial control.

Availability

SN74LVCZ16244ADL is available at Aetrix Electronics and suitable for industrial backplane interfaces, FPGA I/O expansion, and memory subsystem buffering requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.

Supply support for SN74LVCZ16244ADL 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 decades of experience in high-reliability logic and interface solutions.

The SN74LVCZ16244ADL belongs to TI's Widebus™ family of advanced bus-interface ICs, engineered specifically to enhance density, timing performance, and mixed-voltage interoperability in memory, clock, and system-bus applications.

FAQ

What is the maximum operating temperature range for SN74LVCZ16244ADL?

The SN74LVCZ16244ADL is rated for operation from –40°C to +85°C ambient temperature, meeting industrial-grade environmental requirements. This range is validated across all electrical specifications including propagation delay, output drive, and I_off performance - ensuring reliable function in factory automation, outdoor equipment, and enclosed control cabinets where thermal management is constrained.

Does SN74LVCZ16244ADL support true 5-V to 3.3-V level translation?

Yes, SN74LVCZ16244ADL supports bidirectional level translation: its inputs accept 0–5.5 V regardless of V_CC (2.7–3.6 V), and outputs swing rail-to-rail between GND and V_CC. When V_CC = 3.3 V, it converts 5-V inputs to 3.3-V outputs without external components - a key feature confirmed in the SCES277D datasheet Section 1 and Functional Description.

How does the I_off feature protect SN74LVCZ16244ADL during hot insertion?

The I_off circuitry in SN74LVCZ16244ADL actively disables all outputs when V_CC = 0 V, limiting reverse current to ±5 µA even if 5-V signals are present on A or Y pins. This prevents damaging back-current flow into the unpowered device - a requirement verified per JESD 78 Class II and explicitly documented in the Absolute Maximum Ratings and Functional Description sections of the SN74LVCZ16244ADL datasheet.

Can SN74LVCZ16244ADL be used as a single 16-bit buffer or only in smaller groups?

SN74LVCZ16244ADL can be configured flexibly: as one 16-bit buffer (all OEs tied together), two independent 8-bit buffers (e.g., 1OE+2OE vs. 3OE+4OE), or four separate 4-bit buffers (each OE controlled individually). This configurability is defined in the Function Table and Logic Diagram of the SCES277D datasheet and enables optimal timing, power, and control granularity in memory, clock, and test-system designs.

What is the recommended pull-up resistor value for OE when using SN74LVCZ16244ADL in hot-swap applications?

TI specifies that OE should be tied to V_CC via a pullup resistor when V_CC > 1.5 V to guarantee high-impedance outputs during power-up. The minimum resistor value depends on the driver's current-sinking capability - typically 10 kΩ suffices for most applications, as confirmed in the "Power-Up 3-State" section of the SN74LVCZ16244ADL datasheet (SCES277D, p.2). Lower values improve noise immunity but increase quiescent current.