Texas Instruments SN74LVC245AIPWREP

Overview

SN74LVC245AIPWREP from Texas Instruments is an octal 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 signaling (5-V-tolerant inputs with 3.3-V VCC), delivers ≤6.3 ns propagation delay at 3.3 V, and features Ioff partial-power-down protection. It is used in industrial backplane interfaces requiring voltage-level translation and bus isolation.

For engineers reviewing the SN74LVC245AIPWREP datasheet, SN74LVC245AIPWREP pinout, SN74LVC245AIPWREP application, or SN74LVC245AIPWREP equivalent, key selection criteria include 3.3-V operation with 5-V input tolerance, DIR/OE-controlled directionality, 20-pin TSSOP package compatibility, and guaranteed -40°C to +85°C extended-temperature performance.

Technical Context

This device implements dual-bus bidirectional data routing using a single DIR control signal to select A→B or B→A flow, while OE independently enables or disables all outputs into high-impedance state. Its Ioff circuitry actively blocks current backflow during power-down, enabling safe hot-insertion in partial-power-down systems.

Input thresholds are VIL ≤ 0.35×VCC and VIH ≥ 0.65×VCC across 1.65–3.6 V supply range; output drive strength reaches ±24 mA at 3.0 V, with VOL ≤ 0.55 V and VOH ≥ 2.3 V under full load. All inputs tolerate up to 5.5 V regardless of VCC, enabling robust level-shifting in heterogeneous voltage domains.

Key Specifications

Pinout & Package

TSSOP-20 (PW) package, 6.5 mm × 4.4 mm body, 0.65 mm pitch, 1.2 mm max height, RoHS-compliant NIPDAU finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC245AIPWREP, SN74LVC245APWRE4 offers identical functionality with minor packaging logistics variance, while 74LVC245ABQ,118 provides mechanical and thermal advantages at the cost of layout redesign - both require no logic or timing revalidation.

Availability

SN74LVC245AIPWREP is available at Aetrix Electronics and suitable for industrial backplane interfaces, microcontroller peripheral bridging, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVC245AIPWREP 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 company specializing in analog and embedded processing solutions, with decades of leadership in logic, interface, and power management ICs.

The SN74LVC245AIPWREP belongs to TI's LVC logic family, engineered for low-voltage, high-speed, mixed-signal interfacing in industrial, automotive, and communications infrastructure applications.

FAQ

What is the maximum operating frequency supported by SN74LVC245AIPWREP?

The SN74LVC245AIPWREP does not specify a maximum clock frequency directly, but its 6.3 ns maximum propagation delay at 3.3 V implies reliable operation up to approximately 80 MHz for single-cycle bus transfers. System-level timing depends on trace length, loading, and setup/hold margins - actual achievable frequency must be validated in the target PCB environment using the SN74LVC245AIPWREP's published tpd, ten, and tdis values.

Does SN74LVC245AIPWREP support hot-swap or live-insertion scenarios?

Yes, SN74LVC245AIPWREP supports hot-swap via its Ioff feature, which disables outputs and limits reverse current to ±10 µA when VCC = 0 V and inputs/outputs are biased to 5.5 V. This prevents damage during insertion into a live backplane. However, OE must be held high (via pullup) during power-up to ensure outputs remain in high-Z until VCC stabilizes - proper power sequencing remains essential for robust SN74LVC245AIPWREP deployment.

Can SN74LVC245AIPWREP translate between 3.3-V and 5-V logic levels bidirectionally?

Yes, SN74LVC245AIPWREP enables bidirectional level translation: its inputs accept 0–5.5 V regardless of VCC (1.65–3.6 V), and its outputs swing rail-to-rail (0 to VCC) with 5-V-tolerant structure. When VCC = 3.3 V, it safely receives 5-V signals on A or B ports and drives 3.3-V-compatible outputs - making SN74LVC245AIPWREP ideal for mixed-voltage system interconnects without external components.

What is the recommended pull-up resistor value for OE on SN74LVC245AIPWREP?

Texas Instruments recommends tying OE to VCC through a pullup resistor to ensure high-impedance state during power-up. The minimum value depends on the driving source's sink capability; for typical microcontroller GPIOs (±20 mA), a 10-kΩ resistor suffices. Lower values (e.g., 4.7 kΩ) improve noise immunity but increase static current - design validation with the actual SN74LVC245AIPWREP in-circuit is advised to confirm reliable deassertion timing.

Is SN74LVC245AIPWREP pin-compatible with standard commercial SN74LVC245A variants?

Yes, SN74LVC245AIPWREP shares identical pinout, electrical behavior, and TSSOP-20 (PW) package dimensions with the commercial SN74LVC245APWRE4 and SN74LVC245APWR. Differences are limited to enhanced product qualifications (extended temp, DMS support, controlled baseline), not physical or functional compatibility - existing PCBs designed for SN74LVC245A will accept SN74LVC245AIPWREP without modification.