component
74LV123BQ
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
markdown74LV123BQ
Nexperia · Monostable Multivibrators · DHVQFN-16-EP(2.5x3.5)
74LV123BQ 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; Schmitt-trigger input with clamp diodes that allow current-limited input voltages in excess of VCC. |
| 2 | 1B | input | Positive-edge triggered input 1; Schmitt-trigger input with clamp diodes that allow current-limited input voltages in excess of VCC. |
| 3 | 1RD | input | Direct reset LOW and positive-edge triggered input 1; a LOW level terminates the output pulse of monostable 1. |
| 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 minimum noise generation the datasheet recommends grounding it externally to pin 8 (GND). |
| 7 | 2REXT/CEXT | passive | External resistor and capacitor connection 2 for setting the output pulse width of monostable 2 (tW = K x REXT x CEXT). |
| 8 | GND | power_in | Ground (0 V) reference for all voltages, limits and characteristics in the datasheet. |
| 9 | 2A | input | Negative-edge triggered input 2; Schmitt-trigger input with clamp diodes that allow current-limited input voltages in excess of VCC. |
| 10 | 2B | input | Positive-edge triggered input 2; Schmitt-trigger input with clamp diodes that allow current-limited input voltages in excess of VCC. |
| 11 | 2RD | input | Direct reset LOW and positive-edge triggered input 2; a LOW level terminates the output pulse of monostable 2. |
| 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 minimum noise generation the datasheet recommends grounding it externally to pin 8 (GND). |
| 15 | 1REXT/CEXT | passive | External resistor and capacitor connection 1 for setting the output pulse width of monostable 1 (tW = K x REXT x CEXT). |
| 16 | VCC | power_in | Supply voltage, recommended range 1.0 V to 5.5 V; absolute maximum is -0.5 V to +7 V. |
| 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 | 5 | ||
| Input clamping current | IIK | -20 | 20 | mA | VI < -0.5 V or VI > VCC + 0.5 V | 5 | |
| Output clamping current | IOK | -50 | 50 | mA | VO < -0.5 V or VO > VCC + 0.5 V | 5 | |
| Output current | IO | -25 | 25 | mA | except for pins nREXT/CEXT; VO = -0.5 V to (VCC + 0.5 V) | 5 | |
| Supply current | ICC | 50 | mA | 5 | |||
| Ground current | IGND | -50 | mA | 5 | |||
| Storage temperature | Tstg | -65 | 150 | °C | 5 | ||
| Total power dissipation | Ptot | 500 | mW | Tamb = -40 °C to +125 °C | 5 | ||
| Supply voltage | VCC | 1 | 3.3 | 5.5 | V | 6 | |
| Input voltage | VI | 0 | V | maximum is VCC | 6 | ||
| Output voltage | VO | 0 | V | maximum is VCC | 6 | ||
| Ambient temperature | Tamb | -40 | 25 | 125 | °C | in free air | 6 |
| Input transition rise and fall rate | Δt/ΔV | 500 | ns/V | VCC = 1.0 V to 2.0 V | 6 | ||
| Input transition rise and fall rate | Δt/ΔV | 200 | ns/V | VCC = 2.0 V to 2.7 V | 6 | ||
| Input transition rise and fall rate | Δt/ΔV | 100 | ns/V | VCC = 2.7 V to 3.6 V | 6 | ||
| Input transition rise and fall rate | Δt/ΔV | 50 | ns/V | VCC = 3.6 V to 5.5 V | 6 | ||
| HIGH-level input voltage | VIH | 0.9 | V | Tamb = -40 °C to +125 °C; VCC = 1.2 V | 7 | ||
| HIGH-level input voltage | VIH | 1.4 | V | Tamb = -40 °C to +125 °C; VCC = 2.0 V | 7 | ||
| HIGH-level input voltage | VIH | 2 | V | Tamb = -40 °C to +125 °C; VCC = 2.7 V to 3.6 V | 7 | ||
| LOW-level input voltage | VIL | 0.3 | V | Tamb = -40 °C to +125 °C; VCC = 1.2 V | 7 | ||
| LOW-level input voltage | VIL | 0.6 | V | Tamb = -40 °C to +125 °C; VCC = 2.0 V | 7 | ||
| LOW-level input voltage | VIL | 0.8 | V | Tamb = -40 °C to +125 °C; VCC = 2.7 V to 3.6 V | 7 | ||
| HIGH-level output voltage | VOH | 1.8 | V | Tamb = -40 °C to +125 °C; VI = VIH or VIL; IO = -100 μA; VCC = 2.0 V | 7 | ||
| HIGH-level output voltage | VOH | 2.5 | V | Tamb = -40 °C to +125 °C; VI = VIH or VIL; IO = -100 μA; VCC = 2.7 V | 7 | ||
| HIGH-level output voltage | VOH | 2.8 | V | Tamb = -40 °C to +125 °C; VI = VIH or VIL; IO = -100 μA; VCC = 3.0 V | 7 | ||
| HIGH-level output voltage | VOH | 4.3 | V | Tamb = -40 °C to +125 °C; VI = VIH or VIL; IO = -100 μA; VCC = 4.5 V | 7 | ||
| HIGH-level output voltage | VOH | 2.2 | V | Tamb = -40 °C to +125 °C; VI = VIH or VIL; IO = -6 mA; VCC = 3.0 V | 7 | ||
| HIGH-level output voltage | VOH | 3.5 | V | Tamb = -40 °C to +125 °C; VI = VIH or VIL; IO = -12 mA; VCC = 4.5 V | 7 | ||
| LOW-level output voltage | VOL | 0.2 | V | Tamb = -40 °C to +125 °C; VI = VIH or VIL; IO = 100 μA; VCC = 2.0 V | 7 | ||
| LOW-level output voltage | VOL | 0.5 | V | Tamb = -40 °C to +125 °C; VI = VIH or VIL; IO = 6 mA; VCC = 3.0 V | 7 | ||
| LOW-level output voltage | VOL | 0.65 | V | Tamb = -40 °C to +125 °C; VI = VIH or VIL; IO = 12 mA; VCC = 4.5 V | 7 | ||
| Input leakage current | II | 1 | μA | Tamb = -40 °C to +125 °C; VI = VCC or GND; VCC = 5.5 V | 7 | ||
| Supply current | ICC | 160 | μA | Tamb = -40 °C to +125 °C; VI = VCC or GND; IO = 0 A; VCC = 5.5 V | 7 | ||
| Additional supply current | ΔICC | 850 | μA | Tamb = -40 °C to +125 °C; VI = VCC - 0.6 V; VCC = 2.7 V to 3.6 V | 7 | ||
| Propagation delay nRD, nA and nB to nQ | tpd | 92 | ns | nRD, nA and nB to nQ; see Fig. 5; VCC = 2.0 V; -40 °C to +125 °C | 8 | ||
| Propagation delay nRD, nA and nB to nQ | tpd | 68 | ns | nRD, nA and nB to nQ; see Fig. 5; VCC = 2.7 V; -40 °C to +125 °C | 8 | ||
| Propagation delay nRD, nA and nB to nQ | tpd | 57 | ns | nRD, nA and nB to nQ; see Fig. 5; VCC = 3.0 V to 3.6 V; -40 °C to +125 °C | 8 | ||
| Propagation delay nRD, nA and nB to nQ | tpd | 46 | ns | nRD, nA and nB to nQ; see Fig. 5; VCC = 4.5 V to 5.5 V; -40 °C to +125 °C | 8 | ||
| Propagation delay nRD to nQ (reset) | tpd | 68 | ns | nRD to nQ (reset); VCC = 2.0 V; -40 °C to +125 °C | 8 | ||
| Propagation delay nRD to nQ (reset) | tpd | 51 | ns | nRD to nQ (reset); VCC = 2.7 V; -40 °C to +125 °C | 8 | ||
| Propagation delay nRD to nQ (reset) | tpd | 45 | ns | nRD to nQ (reset); VCC = 3.0 V to 3.6 V; -40 °C to +125 °C | 8 | ||
| Propagation delay nRD to nQ (reset) | tpd | 36 | ns | nRD to nQ (reset); VCC = 4.5 V to 5.5 V; -40 °C to +125 °C | 8 | ||
| Pulse width | tW | 40 | ns | Inputs nA, nB and nRD; see Fig. 5; nA = LOW; VCC = 2.0 V; -40 °C to +125 °C | 8 | ||
| Pulse width | tW | 30 | ns | Inputs nA, nB and nRD; see Fig. 5; nA = LOW; VCC = 2.7 V; -40 °C to +125 °C | 8 | ||
| Pulse width | tW | 25 | ns | Inputs nA, nB and nRD; see Fig. 5; nA = LOW; VCC = 3.0 V to 3.6 V; -40 °C to +125 °C | 8 | ||
| Pulse width | tW | 20 | ns | Inputs nA, nB and nRD; see Fig. 5; nA = LOW; VCC = 4.5 V to 5.5 V; -40 °C to +125 °C | 8 | ||
| Pulse width | tW | 45 | ns | nRD = LOW; see Fig. 11; VCC = 2.0 V; -40 °C to +125 °C | 8 |
CAD (KiCad official)
- Symbol:
74LV123BQ - Footprint:
Package_DFN_QFN:DHVQFN-16-1EP_2.5x3.5mm_P0.5mm_EP1x2mm - 3D model: DHVQFN-16-EP(2.5x3.5), generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.9 mm nominal VQFN height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files:
74lv123bq-etched.step/74lv123bq-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);74lv123bq.step/74lv123bq.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (19 pp, sha256
ef158071d430c9dc, retrieved 2026-10-17, 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).