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74AHC123ABQ

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Nexperia Monostable Multivibrators, DHVQFN-16-EP(2.5x3.5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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74AHC123ABQ

Nexperia · Monostable Multivibrators · DHVQFN-16-EP(2.5x3.5)

74AHC123ABQ from Nexperia, in a DHVQFN-16-EP(2.5x3.5). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 1A input Negative-edge triggered input 1; inputs are overvoltage tolerant to 5.5 V.
2 1B input Positive-edge triggered input 1; inputs are overvoltage tolerant to 5.5 V.
3 1RD input Direct reset LOW and positive-edge triggered input 1 that terminates the output pulse when driven LOW.
4 1Q output Active LOW output 1 of the monostable multivibrator.
5 2Q output Active HIGH output 2 of the monostable multivibrator.
6 2CEXT passive External capacitor connection 2 for setting the basic output pulse width together with REXT/CEXT.
7 2REXT/CEXT passive External resistor and capacitor connection 2 for setting the basic output pulse width (REXT from 1 kΩ at VCC > 3.0 V).
8 GND power_in Ground (0 V) reference for all voltages in the datasheet.
9 2A input Negative-edge triggered input 2; inputs are overvoltage tolerant to 5.5 V.
10 2B input Positive-edge triggered input 2; inputs are overvoltage tolerant to 5.5 V.
11 2RD input Direct reset LOW and positive-edge triggered input 2 that terminates the output pulse when driven LOW.
12 2Q output Active LOW output 2 of the monostable multivibrator.
13 1Q output Active HIGH output 1 of the monostable multivibrator.
14 1CEXT passive External capacitor connection 1 for setting the basic output pulse width together with REXT/CEXT.
15 1REXT/CEXT passive External resistor and capacitor connection 1 for setting the basic output pulse width (REXT from 1 kΩ at VCC > 3.0 V).
16 VCC power_in Supply voltage; the recommended range is 2.0 V to 5.5 V for 74AHC123A and 4.5 V to 5.5 V for 74AHCT123A.
17 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Nexperia
Package DHVQFN-16-EP(2.5x3.5)
Category Logic
Pins 17

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
supply voltage VCC -0.5 7 V 6
input voltage VI -0.5 7 V 6
input clamping current IIK -20 mA VI < -0.5 V 6
output clamping current IOK -20 20 mA VO < -0.5 V or VO > VCC + 0.5 V 6
output current IO -25 25 mA VO = -0.5 V to (VCC + 0.5 V) 6
supply current ICC 75 mA 6
ground current IGND -75 mA 6
storage temperature Tstg -65 150 °C 6
total power dissipation Ptot 500 mW Tamb = -40 °C to +125 °C 6
supply voltage VCC 2 5 5.5 V 6
input voltage VI 0 5.5 V 6
output voltage VO 0 V maximum printed as VCC 6
ambient temperature Tamb -40 25 125 °C 6
input transition rise and fall rate Δt/ΔV 100 ns/V VCC = 3.3 V ± 0.3 V 6
input transition rise and fall rate Δt/ΔV 20 ns/V VCC = 5.0 V ± 0.5 V 6
HIGH-level input voltage VIH 1.5 V VCC = 2.0 V 7
HIGH-level input voltage VIH 2.1 V VCC = 3.0 V 7
HIGH-level input voltage VIH 3.85 V VCC = 5.5 V 7
LOW-level input voltage VIL 0.5 V VCC = 2.0 V 7
LOW-level input voltage VIL 0.9 V VCC = 3.0 V 7
LOW-level input voltage VIL 1.65 V VCC = 5.5 V 7
HIGH-level output voltage VOH 1.9 V VI = VIH or VIL; IO = -50 μA; VCC = 2.0 V 7
HIGH-level output voltage VOH 2.9 V VI = VIH or VIL; IO = -50 μA; VCC = 3.0 V 7
HIGH-level output voltage VOH 4.4 V VI = VIH or VIL; IO = -50 μA; VCC = 4.5 V 7
HIGH-level output voltage VOH 2.58 V VI = VIH or VIL; IO = -4.0 mA; VCC = 3.0 V 7
HIGH-level output voltage VOH 3.94 V VI = VIH or VIL; IO = -8.0 mA; VCC = 4.5 V 7
LOW-level output voltage VOL 0 0.1 V VI = VIH or VIL; IO = 50 μA; VCC = 2.0 V 7
LOW-level output voltage VOL 0.36 V VI = VIH or VIL; IO = 4.0 mA; VCC = 3.0 V 7
input leakage current II -0.25 0.25 μA VI = 5.5 V or GND; VCC = 0 V to 5.5 V; nREXT/CEXT 7
input leakage current II -0.1 0.1 μA pins nA, nB, nRD 7
supply current ICC 4 μA VI = VCC or GND; IO = 0 A; VCC = 5.5 V 7
supply current ICC 160 250 μA active state (per circuit); VI = VCC or GND; VCC = 3.0 V 7
supply current ICC 380 500 μA active state (per circuit); VI = VCC or GND; VCC = 4.5 V 7
supply current ICC 560 750 μA active state (per circuit); VI = VCC or GND; VCC = 5.5 V 7
propagation delay nA and nB to nQ and nQ tpd 7.4 20.6 ns nA and nB to nQ and nQ; see Fig. 5; VCC = 3.0 V to 3.6 V; CL = 15 pF 9
propagation delay nA and nB to nQ and nQ tpd 10.5 24.1 ns nA and nB to nQ and nQ; see Fig. 5; VCC = 3.0 V to 3.6 V; CL = 50 pF 9
propagation delay nA and nB to nQ and nQ tpd 5.1 12 ns nA and nB to nQ and nQ; see Fig. 5; VCC = 4.5 V to 5.5 V; CL = 15 pF 9
propagation delay nA and nB to nQ and nQ tpd 7.3 14 ns nA and nB to nQ and nQ; see Fig. 5; VCC = 4.5 V to 5.5 V; CL = 50 pF 9
propagation delay nRD to nQ and nQ tpd 8.2 22.4 ns nRD to nQ and nQ; see Fig. 5; VCC = 3.0 V to 3.6 V; CL = 15 pF 9
propagation delay nRD to nQ and nQ tpd 11.7 25.9 ns nRD to nQ and nQ; see Fig. 5; VCC = 3.0 V to 3.6 V; CL = 50 pF 9
propagation delay nRD to nQ and nQ tpd 5.6 12.9 ns nRD to nQ and nQ; see Fig. 5; VCC = 4.5 V to 5.5 V; CL = 15 pF 9
propagation delay nRD to nQ and nQ tpd 8.1 14.9 ns nRD to nQ and nQ; see Fig. 5; VCC = 4.5 V to 5.5 V; CL = 50 pF 9
propagation delay nRD reset to nQ and nQ tpd 6.4 15.8 ns nRD to nQ and nQ (reset); see Fig. 5; VCC = 3.0 V to 3.6 V; CL = 15 pF 9
propagation delay nRD reset to nQ and nQ tpd 9.2 19.3 ns nRD to nQ and nQ (reset); see Fig. 5; VCC = 3.0 V to 3.6 V; CL = 50 pF 9
propagation delay nRD reset to nQ and nQ tpd 4.4 9.4 ns nRD to nQ and nQ (reset); see Fig. 5; VCC = 4.5 V to 5.5 V; CL = 15 pF 9
propagation delay nRD reset to nQ and nQ tpd 6.3 11.4 ns nRD to nQ and nQ (reset); see Fig. 5; VCC = 4.5 V to 5.5 V; CL = 50 pF 9
propagation delay inputs nA = LOW tpd 5 ns inputs; nA = LOW; see Fig. 5; VCC = 3.0 V to 3.6 V 9
propagation delay inputs nB = HIGH tpd 5 ns inputs; nB = HIGH; see Fig. 5; VCC = 3.0 V to 3.6 V 9
propagation delay inputs nRD = LOW tpd 5 ns inputs; nRD = LOW; see Fig. 5; VCC = 3.0 V to 3.6 V 9
pulse width tW 115 240 ns outputs nQ = LOW and nQ = HIGH; CL = 50 pF; CEXT = 28 pF; REXT = 2 kΩ; VCC = 3.0 V to 3.6 V 9
pulse width tW 100 200 ns outputs nQ = LOW and nQ = HIGH; CL = 50 pF; CEXT = 28 pF; REXT = 2 kΩ; VCC = 4.5 V to 5.5 V 9
pulse width tW 90 100 110 μs CEXT = 0.01 μF; REXT = 10 kΩ; VCC = 3.0 V to 3.6 V 9
pulse width tW 0.9 1 1.1 ms CEXT = 0.1 μF; REXT = 10 kΩ; VCC = 3.0 V to 3.6 V 9

CAD (KiCad official)

  • Symbol: 74AHC123ABQ
  • Footprint: Package_DFN_QFN:DHVQFN-16-1EP_2.5x3.5mm_P0.5mm_EP1x2mm
  • 3D model: DHVQFN-16-EP(2.5x3.5) (KiCad packages3D, STEP)
  • 3D model files: 74ahc123abq-etched.step / 74ahc123abq-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 74ahc123abq.step / 74ahc123abq.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Nexperia datasheet (20 pp, sha256 c251c1363d537163, retrieved 2026-10-22, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF