component
74AHC123ABQ
Public Made by Adomby adom
Nexperia Monostable Multivibrators, DHVQFN-16-EP(2.5x3.5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdown74AHC123ABQ
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);74ahc123abq.step/74ahc123abq.glbare 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, primaryclaude-haiku-5-5(text), consensusclaude-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).