Nexperia USA Inc. 74AHC244BQ-Q100,11

Overview

74AHC244BQ-Q100 from Nexperia is an automotive-qualified octal 3-state buffer/line driver in DHVQFN20 package, supporting dual 4-bit or single 8-bit operation with two independent active-low output enables (1OE, 2OE), overvoltage-tolerant inputs up to 5.5 V, and operation from 2.0 V to 5.5 V supply - used for bidirectional data bus isolation and level translation in automotive body control modules.

For engineers reviewing the 74AHC244BQ-Q100 datasheet, 74AHC244BQ-Q100 pinout, 74AHC244BQ-Q100 application, or 74AHC244BQ-Q100 equivalent, this page delivers verified functional architecture, AEC-Q100 Grade 1 thermal validation (-40 °C to +125 °C), CMOS-level input compatibility, propagation delay specs at 3.3 V/5.0 V, and DHVQFN20 terminal mapping with side-wettable flanks for AOI.

Technical Context

This device implements two independent 4-bit non-inverting buffers, each controlled by a dedicated active-low output enable (1OE for Y0–Y3 group, 2OE for Y0'–Y3' group). Inputs feature Schmitt-trigger action and tolerate voltages up to 5.5 V regardless of VCC, enabling mixed-voltage interfacing between 3.3 V logic domains and 5 V subsystems.

It operates across 2.0 V–5.5 V supply range with balanced tPLH/tPHL propagation delays (e.g., 5.0 ns typ @ VCC = 4.5 V, CL = 15 pF) and fast enable/disable timing (ten = 4.8 ns typ, tdis = 7.0 ns typ @ same conditions), ensuring deterministic bus arbitration in real-time automotive networks.

Key Specifications

Pinout & Package

DHVQFN20 package (SOT764-1), 2.5 mm × 4.5 mm × 0.85 mm body, side-wettable flanks for automated optical inspection (AOI) of solder joints; no leads, 20-terminal quad flat construction with exposed thermal pad (non-electrical, optional GND connection).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT244BQ-Q100 and SN74LVC244AQPWRQ1, the 74AHC244BQ-Q100 uniquely balances wide supply range (2.0–5.5 V), 5.5 V input tolerance, and AEC-Q100 Grade 1 qualification - making it the only choice for new designs requiring interoperability across 3.3 V and 5 V automotive subsystems without external level translation.

Availability

74AHC244BQ-Q100 is available at Aetrix Electronics and suitable for automotive body control modules, instrument cluster interfaces, door module sensor hubs, and engine control unit diagnostic ports requiring stable component supply across extended temperature ranges and AEC-Q100 compliance.

Supply support for 74AHC244BQ-Q100 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

Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions optimized for automotive, industrial, and mobile applications with emphasis on reliability and energy efficiency.

The 74AHC244-Q100 belongs to Nexperia's automotive logic portfolio, designed specifically to meet stringent AEC-Q100 requirements for signal buffering, bus isolation, and voltage translation in safety-critical vehicle subsystems.

FAQ

Is the thermal pad on the DHVQFN20 package electrically connected?

No - the exposed thermal pad (terminal 17) is not internally connected to any circuit node. It may be left floating or soldered to system GND for improved thermal performance, but no electrical requirement exists. If connected to GND, ensure the solder land remains isolated from other planes except the designated GND net.

Can 74AHC244BQ-Q100 drive a 50 pF load at 10 MHz while maintaining signal integrity?

Yes - with typical propagation delay of 5.0 ns and output drive strength of ±8 mA at VCC = 4.5 V, it fully meets timing and slew rate requirements for 50 pF loads. Measured CPD = 10 pF enables accurate dynamic power calculation, and output capacitance (CO = 4.0 pF) minimizes ringing on controlled-impedance traces.

What is the maximum allowable input transition rate (Δt/ΔV) for reliable operation?

The datasheet specifies Δt/ΔV ≤ 20 ns/V at VCC = 5.0 V ± 0.5 V. This means input edges must not exceed 20 ns per volt of swing - e.g., a 5 V transition must be ≥100 ns long. Faster edges risk metastability or increased dynamic current; Schmitt-trigger inputs mitigate but do not eliminate this limit.

How does the device behave when both 1OE and 2OE are HIGH?

When both 1OE and 2OE are HIGH (logic 1), all eight outputs (1Y0–1Y3 and 2Y0–2Y3) enter high-impedance (Z) state regardless of input values. Output leakage current remains ≤±10.0 μA at VCC = 5.5 V, ensuring no unintended loading of downstream buses during power-down or reset sequences.