Nexperia USA Inc. 74HC244BQ-Q100,115

Overview

74HC244BQ-Q100 from Nexperia is an automotive-grade octal non-inverting 3-state buffer/line driver in DHVQFN20 package, operating from 2.0 V to 6.0 V supply, featuring dual independent output enables (1OE, 2OE), CMOS-level inputs, and AEC-Q100 Grade 1 qualification for under-hood control modules.

For engineers reviewing the 74HC244BQ-Q100 datasheet, 74HC244BQ-Q100 pinout, 74HC244BQ-Q100 application, or 74HC244BQ-Q100 equivalent, key selection criteria include propagation delay (9 ns typ @ VCC = 6.0 V), 3-state enable/disable timing (10–38 ns), input clamp diodes for overvoltage-tolerant interfacing, and thermal-enhanced DHVQFN package with side-wettable flanks for AOI-capable solder joint inspection.

Technical Context

This device implements two independent 4-bit buffered data paths, each controlled by a dedicated active-low output enable (1OE for Y0–Y3 group, 2OE for Y0'–Y3' group), enabling selective bus isolation without external logic. Its CMOS input structure provides high noise immunity (>50% VCC), while internal clamp diodes allow safe interface to signals exceeding VCC when used with current-limiting resistors.

The DHVQFN20 package (SOT764-1) features a 2.5 × 4.5 × 0.85 mm body with exposed thermal pad and side-wettable flanks-designed specifically for automotive reflow reliability and automated optical inspection of solder joints. Operation across -40 °C to +125 °C ambient ensures compatibility with engine control unit (ECU) and body control module (BCM) environments.

Key Specifications

Pinout & Package

DHVQFN20 package (SOT764-1) with 2.5 × 4.5 × 0.85 mm footprint, side-wettable flanks for AOI, and thermally enhanced exposed pad (non-electrical, floating or GND-connected per layout).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal 3-state buffer applications.

Compared with 74HC244BQ-Q100, the 74HCT244BQ-Q100 offers TTL input compatibility at the cost of reduced supply flexibility, while the SN74LVC244AQPWRQ1 delivers superior speed and low-voltage operation but mandates mechanical redesign-making the HC variant optimal for cost-sensitive, wide-supply automotive bus isolation where pin compatibility and thermal robustness are prioritized.

Availability

74HC244BQ-Q100 is available at Aetrix Electronics and suitable for engine control units, body electronics modules, ADAS domain controllers, and infotainment head units requiring stable component supply across extended temperature ranges and automotive lifecycle commitments.

Supply support for 74HC244BQ-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 specializing in high-performance, high-reliability standard logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74HC244-Q100 product line delivers AEC-Q100-qualified, wide-supply octal buffers optimized for robust signal routing in electric powertrain, chassis, and safety-critical electronic control units.

FAQ

What is the maximum clock/data rate supported by the 74HC244BQ-Q100?

The 74HC244BQ-Q100 is not a clocked device but a transparent buffer; its usable data rate depends on propagation delay and load. With 9 ns typical tpd and 15 pF load, it reliably supports asynchronous digital buses up to approximately 50 MHz, assuming setup/hold margins are maintained by the driving source.

Can 74HC244BQ-Q100 interface directly with 12 V automotive sensors?

Yes - its input clamp diodes allow safe interface to voltages exceeding VCC when used with appropriate series current-limiting resistors (e.g., 10 kΩ for ≤20 mA clamp current). This enables direct connection to 12 V LIN transceivers or analog sensor outputs without external protection circuitry.

Is the exposed thermal pad on the DHVQFN20 package electrically connected?

No - the exposed pad (terminal 1 index area) has no electrical function. Per Nexperia's datasheet, it may be left floating or connected to GND for thermal improvement, but must not be tied to any other voltage potential to avoid latch-up or parametric shift.

How does the dual output enable architecture improve system design?

The independent 1OE and 2OE pins allow simultaneous or staggered control of two 4-bit data groups - enabling selective bus isolation, reducing contention in multi-master systems, and simplifying timing-critical arbitration logic that would otherwise require external gates or additional MCU GPIOs.