NXP Semiconductors 74LVCH322245AEC/G:

Overview

74LVCH322245AEC/G from NXP Semiconductors is a 32-bit non-inverting bus transceiver with four independent direction (nDIR) and output enable (nOE) controls, integrated 30 Ω series termination resistors on all outputs, 1.2 V to 3.6 V supply operation, and 5 V-tolerant I/O for mixed-voltage system interfacing in high-speed data buses.

For engineers reviewing the 74LVCH322245AEC/G datasheet, 74LVCH322245AEC/G pinout, 74LVCH322245AEC/G application, or 74LVCH322245AEC/G equivalent, this device supports precise bidirectional data flow control in DDR memory subsystems, FPGA-to-ASIC interconnects, and industrial backplane interfaces where noise reduction and voltage-level translation are critical.

Technical Context

The 74LVCH322245AEC/G implements four independent 8-bit transceiver sections (1A/1B through 4A/4B), each with dedicated nDIR and nOE inputs enabling granular bus isolation and direction switching without propagation delay skew between channels. Its CMOS design ensures low static current (≤40 µA at VCC = 3.6 V) while maintaining TTL-compatible input thresholds.

All 32 I/O pins feature bus hold circuitry eliminating external pull-ups on unused inputs, and internal 30 Ω series resistors suppress transmission-line reflections in point-to-point or stubbed bus topologies operating up to 160 MHz (tpd ≤ 5.7 ns at VCC = 3.3 V). The device complies with JEDEC JESD8-B/JESD36 for 3.3 V logic and withstands 5.5 V on inputs/outputs when disabled.

Key Specifications

Pinout & Package

Package: LFBGA96 (SOT536-1), plastic fine-pitch ball grid array, 13.5 × 5.5 × 1.05 mm body, 96 solder balls.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit bus transceiver applications.

Compared with SN74LVC32245PAG and 74ALVCH32244AEC, the 74LVCH322245AEC/G delivers superior noise immunity via monolithic 30 Ω termination and lower quiescent current, making it optimal for compact, high-density industrial and automotive PCBs where EMI compliance and power efficiency are mandatory.

Availability

74LVCH322245AEC/G is available at Aetrix Electronics and suitable for DDR memory interfaces, FPGA-to-ASIC interconnects, and industrial backplane buses requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for 74LVCH322245AEC/G 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

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in logic, interface, and power management ICs.

The 74LVCH322245AEC/G belongs to NXP's LVCH advanced low-voltage CMOS logic family, engineered for high-speed, low-noise bidirectional data transfer in mixed-voltage embedded systems.

FAQ

What is the maximum data rate supported by the 74LVCH322245AEC/G?

The 74LVCH322245AEC/G achieves a typical propagation delay of 3.3 ns at VCC = 3.3 V, supporting reliable operation up to 160 MHz in well-terminated point-to-point bus configurations. Its 30 Ω integrated series resistors dampen reflections, enabling stable high-speed signaling without external termination networks. Actual achievable data rate depends on PCB layout, load capacitance, and termination matching.

Does the 74LVCH322245AEC/G require external pull-up resistors on its nOE pins?

Yes - to ensure high-impedance state during power-up or power-down, each nOE pin must be tied to VCC via an external pull-up resistor. The minimum resistance value depends on the driving circuit's current-sinking capability; NXP recommends verifying against the driver's IOL specification. Bus hold is not provided on control inputs like nOE or nDIR.

Can the 74LVCH322245AEC/G interface directly with 5 V TTL logic?

Yes - the 74LVCH322245AEC/G features 5 V-tolerant inputs and outputs, allowing direct connection to 5 V TTL devices even when powered from a 1.2 V–3.6 V supply. Inputs accept voltages up to 5.5 V, and outputs can safely drive 5 V loads in 3-state mode. This eliminates level-shifter ICs in mixed-voltage systems.

How does the bus hold function work on the 74LVCH322245AEC/G data inputs?

The 74LVCH322245AEC/G includes active bus hold circuitry on all A/B data pins (but not nDIR or nOE), which maintains the last-valid logic state when inputs float. It sources/sinks ±75 µA at VCC = 3.0 V to hold LOW/HIGH states, eliminating external pull-up/down resistors on unused or undriven lines - reducing BOM count and improving reliability in modular systems.

What package type is used for the 74LVCH322245AEC/G and why is it suitable for high-speed designs?

The 74LVCH322245AEC/G uses the LFBGA96 (SOT536-1) package: a 13.5 × 5.5 × 1.05 mm fine-pitch ball grid array with 96 solder balls. Its eight VCC and sixteen GND balls provide low-inductance power delivery, minimizing ground bounce and simultaneous switching noise - critical for clean signal integrity in 32-bit parallel buses operating above 100 MHz.