Texas Instruments SN74LVCR162245DL

Overview

SN74LVCR162245DL from Texas Instruments is a dual-octal noninverting 16-bit bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 2.7-V to 3.6-V buses. It supports 5.5-V-tolerant inputs, features integrated 26-Ω output series resistors, and includes active bus-hold circuitry on all data inputs. It is used in high-speed memory expansion interfaces and FPGA-to-ASIC interconnects.

For engineers reviewing the SN74LVCR162245DL datasheet, SN74LVCR162245DL pinout, SN74LVCR162245DL application, or SN74LVCR162245DL equivalent, key selection considerations include VCC operating range (2.7–3.6 V), max propagation delay of 8.5 ns at 3.3 V, 3-state output isolation timing, and SSOP-48 package compatibility with legacy board layouts.

Technical Context

This device implements two independent 8-bit transceivers in one package, each with dedicated direction (DIR) and output-enable (OE) controls. Logic-level translation is supported via 5.5-V-tolerant inputs while maintaining 3.3-V-compatible outputs, enabling mixed-voltage system interfacing without external level shifters.

The internal bus-hold circuitry actively maintains valid logic states on floating inputs, eliminating need for external pullup/pulldown resistors. All outputs integrate 26-Ω series termination to suppress overshoot/undershoot, reducing signal integrity issues in high-speed parallel bus designs.

Key Specifications

Pinout & Package

SN74LVCR162245DL is housed in a 48-pin SSOP (Shrink Small-Outline Package) with 0.5-mm lead pitch, 12.4–12.6 mm body width, and 6.0–6.2 mm body length. The package is RoHS-compliant, moisture-sensitivity Level-1 rated, and compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVCR162245DL, SN74LVC162245DGGR removes bus-hold and 5.5-V tolerance but retains pin compatibility and cost advantage, while SN74AVC162245DGGR trades integrated termination and robustness for wider VCC range and faster propagation-requiring redesign of termination strategy and voltage rail planning.

Availability

SN74LVCR162245DL is available at Aetrix Electronics and suitable for industrial PLC backplanes, FPGA-to-ASIC interconnects, memory expansion interfaces, and test equipment data acquisition buses requiring stable component supply across extended temperature ranges.

Supply support for SN74LVCR162245DL 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 SN74LVCR162245DL belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for noise-immune, high-speed parallel data transfer in industrial, communications, and computing infrastructure.

FAQ

What is the maximum operating frequency supported by the SN74LVCR162245DL?

The SN74LVCR162245DL does not specify a maximum clock frequency directly, but its 8.5 ns maximum propagation delay at 3.3 V implies reliable operation up to approximately 100 MHz in well-terminated, low-skew parallel bus configurations. Actual achievable frequency depends on load capacitance, trace routing, and system-level timing margins-not internal device limits alone. SN74LVCR162245DL performance remains consistent across its full –40°C to +85°C operating range.

Does the SN74LVCR162245DL require external pull-up resistors on its DIR or OE pins?

No, external pull-up resistors are not required on DIR or OE for basic functionality, but TI recommends tying OE to VCC through a pull-up resistor during power-up/down to guarantee high-impedance outputs before control logic stabilizes. The SN74LVCR162245DL's bus-hold circuitry applies only to data inputs (A/B ports), not control inputs. For robust power sequencing, a 10-kΩ resistor is typical. SN74LVCR162245DL control pins accept standard CMOS logic levels referenced to its VCC rail.

Can the SN74LVCR162245DL be used to interface a 5-V microcontroller with a 3.3-V FPGA?

Yes-the SN74LVCR162245DL supports 5.5-V-tolerant inputs while operating from a 3.3-V supply, making it ideal for unidirectional or bidirectional level translation between 5-V and 3.3-V domains. When connecting a 5-V microcontroller to a 3.3-V FPGA, route the microcontroller's data lines to the SN74LVCR162245DL's B-side inputs and FPGA's data lines to A-side outputs, using DIR to control direction and OE for tristate control. SN74LVCR162245DL eliminates need for discrete level shifters or voltage dividers.

How does the bus-hold feature of the SN74LVCR162245DL affect system power consumption?

The bus-hold circuitry in the SN74LVCR162245DL draws ±75 µA per input at VI = 2 V, contributing minimally to total ICC-typically less than 1.5 mA for all 32 data inputs active at mid-rail. This current is independent of OE or DIR state and remains active even when outputs are disabled. While slightly increasing quiescent current versus non-bus-hold variants like SN74LVC162245, the SN74LVCR162245DL avoids higher leakage or oscillation-related power spikes caused by floating inputs, improving overall system stability and predictability.

Is the SN74LVCR162245DL pin-compatible with other 48-pin SSOP transceivers in TI's portfolio?

Yes-the SN74LVCR162245DL shares identical pinout, package dimensions, and pad layout with SN74LVC162245DL and SN74AVC162245DL in the DL package variant, enabling drop-in replacement in many cases. However, functional differences exist: SN74LVC162245DL lacks bus-hold and 5.5-V tolerance, while SN74AVC162245DL omits integrated 26-Ω resistors and supports lower VCC. Always verify control logic compatibility and timing margins before substitution. SN74LVCR162245DL remains the only variant combining all three features in SSOP-48.