Nexperia USA Inc. 74HC109D-Q100J

Overview

74HC109D-Q100 from Nexperia is an automotive-qualified dual positive-edge-triggered JK flip-flop with asynchronous set (SD) and reset (RD) inputs, complementary Q/Q̅ outputs per section, and TTL-compatible input thresholds for 74HCT variant - operating from -40 °C to +125 °C with supply voltage range 2.0–6.0 V (HC) or 4.5–5.5 V (HCT), used in engine control unit timing synchronization and transmission logic state retention.

For engineers reviewing the 74HC109D-Q100 datasheet, 74HC109D-Q100 pinout, 74HC109D-Q100 application, or 74HC109D-Q100 equivalent, this page delivers verified functional behavior, SO16 package layout, AEC-Q100 Grade 1 qualification status, propagation delay (tpd = 14–53 ns), and direct substitution guidance against 74HC112D-Q100 and SN74LV109APWRE4.

Technical Context

This device implements two independent edge-triggered JK latches sharing no internal coupling; each features separate J/K data paths, asynchronous active-low SD/RD controls decoupled from clock edges, and Schmitt-triggered CP inputs tolerant of slow rise/fall times. The toggle, set, reset, and hold modes are defined by J/K states at clock transition, with setup time (tsu = 5–18 ns) and hold time (th = 0–3 ns) strictly enforced relative to the LOW-to-HIGH CP edge.

Input clamping diodes enable overvoltage-safe interfacing via current-limiting resistors, while CMOS construction ensures low static power (ICC ≤ 80 μA at 6 V) and high noise immunity. The 74HC version accepts CMOS-level inputs (VIH ≥ 3.15 V @ VCC = 4.5 V); the 74HCT variant matches TTL thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V @ VCC = 4.5–5.5 V).

Key Specifications

Pinout & Package

74HC109D-Q100 uses the plastic small outline package SOT109-1 (SO16), 16-pin, 3.9 mm body width, with standard JEDEC MS-012 footprint and 1.27 mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual JK flip-flop applications.

Compared with 74HC112D-Q100 and SN74LV109APWRE4, the 74HC109D-Q100 uniquely combines positive-edge triggering, full Grade 1 temperature coverage, and SO16 footprint - making it the only option for new AEC-Q100-compliant designs requiring direct sensor-edge sampling at extended temperature.

Availability

74HC109D-Q100 is available at Aetrix Electronics and suitable for engine control units, transmission control modules, and body control modules requiring stable component supply across automotive production lifecycles.

Supply support for 74HC109D-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, discrete, and MOSFET solutions optimized for automotive, industrial, and mobile applications with emphasis on reliability and AEC-Q100 compliance.

This device belongs to Nexperia's automotive logic portfolio, designed specifically for robust digital state retention and synchronization in harsh-temperature, high-noise vehicle subsystems.

FAQ

What is the maximum clock frequency supported by 74HC109D-Q100 at 5.0 V?

At VCC = 5.0 V and CL = 15 pF, the maximum clock frequency is 75 MHz (typical) per section. This is derived from propagation delay (tpd = 15 ns) and transition time (tt = 12 ns), ensuring reliable setup/hold timing margins. Operation above this frequency risks metastability or incorrect state capture.

Can 74HC109D-Q100 interface directly with 3.3 V microcontrollers?

Yes - the 74HC variant accepts VIH ≥ 3.15 V at VCC = 4.5 V, and its outputs drive VOH ≥ 3.98 V (IO = −4.0 mA), fully compatible with 3.3 V logic inputs. For 3.3 V supply operation, ensure VCC = 3.3 V is within the 2.0–6.0 V range and verify VIH/VIL thresholds per Table 6.

How does the Schmitt-triggered clock input improve noise immunity?

The Schmitt-trigger on CP provides hysteresis (~0.3 V at VCC = 4.5 V), rejecting sub-threshold noise spikes and slow-rising signals common in automotive wiring harnesses. This prevents false clocking from EMI-induced ringing or contact bounce, ensuring deterministic edge-triggered behavior even with 100 ns rise times.

Is there a pin-compatible 74HCT variant of this part?

Yes - 74HCT109D-Q100 shares identical SO16 pinout, temperature range (−40 °C to +125 °C), and AEC-Q100 Grade 1 qualification. It differs only in input thresholds (TTL-compatible: VIH ≥ 2.0 V, VIL ≤ 0.8 V), making it ideal for interfacing with legacy 5 V TTL systems without level shifters.