NXP Semiconductors 74LVCH32374AEC,557

Overview

74LVCH32374AEC,557 from NXP Semiconductors is a 32-bit edge-triggered D-type flip-flop with four independent 8-bit sections, 3-state outputs, 5 V tolerant I/O, and bus hold on all data inputs. It operates from 1.2 V to 3.6 V supply, supports −40 °C to +125 °C ambient, and enables robust bidirectional bus interfacing in mixed-voltage systems.

For engineers reviewing the 74LVCH32374AEC,557 datasheet, 74LVCH32374AEC,557 pinout, 74LVCH32374AEC,557 application, or 74LVCH32374AEC,557 equivalent, this device serves as a high-density, low-power latch for data synchronization, address/data bus buffering, and level-shifted I/O control in industrial controllers, telecom backplanes, and FPGA-adjacent logic interfaces.

Technical Context

The 74LVCH32374AEC,557 implements four independent 8-bit D-type registers, each with dedicated clock (nCP) and output enable (nOE) inputs. Flip-flop state capture occurs on the LOW-to-HIGH transition of nCP, meeting set-up/hold time requirements down to 1.9 ns at 3.3 V.

Each section's outputs enter high-impedance OFF-state when its nOE is HIGH, without affecting internal register state. Bus hold circuitry maintains stable logic levels on unused D inputs, eliminating external pull-ups. Inputs tolerate up to 5.5 V regardless of VCC, enabling direct interface with 5 V TTL and 3.3 V CMOS logic.

Key Specifications

Pinout & Package

Packaged in LFBGA96 (SOT536-1): plastic low-profile fine-pitch ball grid array, 96 balls, body size 13.5 × 5.5 × 1.05 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC32374ARGYR and 74ALVCH32374AEC,557, the 74LVCH32374AEC,557 uniquely combines 1.2 V operation, full 5 V I/O tolerance, integrated bus hold, and −40 °C to +125 °C qualification - making it the only option for ruggedized, mixed-voltage, low-power industrial designs requiring zero external bias components.

Availability

74LVCH32374AEC,557 is available at Aetrix Electronics and suitable for industrial PLC backplanes, telecom line cards, and FPGA configuration support requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for 74LVCH32374AEC,557 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 company specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with leadership in logic, interface, and power management ICs.

The 74LVCH32374AEC,557 belongs to NXP's LVCH family of advanced CMOS logic devices, designed specifically for high-reliability, mixed-voltage digital interfacing in harsh industrial and infrastructure equipment.

FAQ

What is the minimum supply voltage supported by the 74LVCH32374AEC,557?

The 74LVCH32374AEC,557 supports a functional supply voltage range from 1.2 V to 3.6 V, as specified in Table 5 of the NXP datasheet. At 1.2 V, it delivers guaranteed operation including 5 V tolerant inputs, bus hold functionality, and defined propagation delay (14 ns max), making it suitable for ultra-low-power industrial sensor nodes and battery-backed systems where other 32-bit latches fail to operate.

Does the 74LVCH32374AEC,557 require external pull-up resistors on unused data inputs?

No, the 74LVCH32374AEC,557 does not require external pull-up resistors because all 32 data inputs feature integrated bus hold circuitry. This active circuit maintains a valid logic level (HIGH or LOW) on floating inputs using ±10 µA to ±75 µA of current depending on VCC, eliminating risk of metastability and reducing BOM count and PCB area - a key advantage over alternatives like SN74LVC32374ARGYR.

Can the 74LVCH32374AEC,557 safely drive a 5 V bus while powered from 3.3 V?

Yes, the 74LVCH32374AEC,557 can safely drive a 5 V bus while powered from 3.3 V. Its outputs are 5 V tolerant in 3-state mode (up to 6.5 V per Table 4), and its 3-state outputs maintain high-impedance integrity even when VO exceeds VCC. This allows direct connection to 5 V terminated buses without level shifters - confirmed by NXP's "5 V tolerant inputs/outputs" feature and absolute maximum ratings.

What is the maximum clock frequency supported by the 74LVCH32374AEC,557 at 3.3 V?

At VCC = 3.0 V to 3.6 V and ambient temperature −40 °C to +125 °C, the 74LVCH32374AEC,557 supports a maximum clock frequency of 120 MHz, as specified in Table 7. This is enabled by a minimum clock pulse width of 3.0 ns and propagation delay as low as 1.5 ns, ensuring reliable setup/hold timing margins in high-speed synchronous bus applications such as FPGA-to-ASIC bridging.

How many ground and supply pins does the 74LVCH32374AEC,557 have in its LFBGA96 package?

The 74LVCH32374AEC,557 in LFBGA96 (SOT536-1) has 16 dedicated GND balls and 8 dedicated VCC balls, as listed in Table 2 of the NXP datasheet. This distributed power/ground architecture minimizes simultaneous switching noise and ground bounce - critical for maintaining signal integrity across all 32 bits during high-frequency operation in industrial and telecom systems.