component
74HC123PW
Public Made by Adomby adom
Nexperia Monostable Multivibrators, TSSOP-16. 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
markdown74HC123PW
Nexperia · Monostable Multivibrators · TSSOP-16
74HC123PW from Nexperia, in a TSSOP-16. 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 (nA input of monostable 1). |
| 2 | 1B | input | Positive-edge triggered input 1 (nB input of monostable 1). |
| 3 | 1RD | input | Direct reset input 1: LOW-level reset terminates the output pulse, and the input is also positive-edge triggered. |
| 4 | 1Q | output | Active LOW output 1 (complementary output of monostable 1, the pin printed with the overbar on the symbol). |
| 5 | 2Q | output | Active HIGH output 2 (true output of monostable 2). |
| 6 | 2CEXT | passive | External capacitor connection 2; the datasheet recommends grounding it externally to pin 8 (GND) for minimum noise generation. |
| 7 | 2REXT/CEXT | passive | External resistor and capacitor connection 2 for setting the output pulse width of monostable 2 (REXT 2 kΩ to 1000 kΩ at VCC = 5.0 V). |
| 8 | GND | power_in | Ground (0 V) reference for all voltages. |
| 9 | 2A | input | Negative-edge triggered input 2 (nA input of monostable 2). |
| 10 | 2B | input | Positive-edge triggered input 2 (nB input of monostable 2). |
| 11 | 2RD | input | Direct reset input 2: LOW-level reset terminates the output pulse, and the input is also positive-edge triggered. |
| 12 | 2Q | output | Active LOW output 2 (complementary output of monostable 2, the pin printed with the overbar on the symbol). |
| 13 | 1Q | output | Active HIGH output 1 (true output of monostable 1). |
| 14 | 1CEXT | passive | External capacitor connection 1; the datasheet recommends grounding it externally to pin 8 (GND) for minimum noise generation. |
| 15 | 1REXT/CEXT | passive | External resistor and capacitor connection 1 for setting the output pulse width of monostable 1 (REXT 2 kΩ to 1000 kΩ at VCC = 5.0 V). |
| 16 | VCC | power_in | Supply voltage: 2.0 V to 6.0 V for 74HC123PW and 4.5 V to 5.5 V for 74HCT123PW (absolute maximum 7 V). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | TSSOP-16 |
| Category | Logic |
| Pins | 16 |
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 clamping current | IIK | -20 | 20 | mA | VI < -0.5 V or VI > VCC + 0.5 V | 6 | |
| Output clamping current | IOK | -20 | 20 | mA | VO < -0.5 V or VO > VCC + 0.5 V | 6 | |
| Output current except pins nREXT/CEXT | IO | -25 | 25 | mA | VO = -0.5 V to (VCC + 0.5 V) | 6 | |
| Supply current | ICC | 50 | mA | 6 | |||
| Ground current | IGND | -50 | mA | 6 | |||
| Storage temperature | Tstg | -65 | 150 | °C | 6 | ||
| Total power dissipation | Ptot | 500 | mW | Derates linearly 8.5 mW/K above 91 °C (SOT403-1 TSSOP16) | 6 | ||
| Supply voltage | VCC | 2 | 5 | 6 | V | 6 | |
| Input voltage | VI | 0 | V | 6 | |||
| Output voltage | VO | 0 | V | 6 | |||
| Input transition rise and fall rate (nRD input) | Δt/ΔV | 625 | ns/V | VCC = 2.0 V | 6 | ||
| Input transition rise and fall rate (nRD input) | Δt/ΔV | 1.67 | 139 | ns/V | VCC = 4.5 V | 6 | |
| Input transition rise and fall rate (nRD input) | Δt/ΔV | 83 | ns/V | VCC = 6.0 V | 6 | ||
| Ambient temperature | Tamb | -40 | 25 | 125 | °C | 6 | |
| HIGH-level input voltage | VIH | 1.5 | V | VCC = 2.0 V; Tamb -40 °C to +125 °C | 6 | ||
| HIGH-level input voltage | VIH | 3.15 | V | VCC = 4.5 V; Tamb -40 °C to +125 °C | 6 | ||
| HIGH-level input voltage | VIH | 4.2 | V | VCC = 6.0 V; Tamb -40 °C to +125 °C | 6 | ||
| LOW-level input voltage | VIL | 0.5 | V | VCC = 2.0 V; Tamb -40 °C to +125 °C | 6 | ||
| LOW-level input voltage | VIL | 1.35 | V | VCC = 4.5 V; Tamb -40 °C to +125 °C | 6 | ||
| LOW-level input voltage | VIL | 1.8 | V | VCC = 6.0 V; Tamb -40 °C to +125 °C | 6 | ||
| HIGH-level output voltage | VOH | 1.9 | V | VI = VIH or VIL; IO = -20 μA; VCC = 2.0 V; Tamb -40 °C to +125 °C | 7 | ||
| HIGH-level output voltage | VOH | 4.4 | V | VI = VIH or VIL; IO = -20 μA; VCC = 4.5 V; Tamb -40 °C to +125 °C | 7 | ||
| HIGH-level output voltage | VOH | 5.9 | V | VI = VIH or VIL; IO = -20 μA; VCC = 6.0 V; Tamb -40 °C to +125 °C | 7 | ||
| HIGH-level output voltage | VOH | 3.7 | V | VI = VIH or VIL; IO = -4 mA; VCC = 4.5 V; Tamb -40 °C to +125 °C | 7 | ||
| HIGH-level output voltage | VOH | 5.2 | V | VI = VIH or VIL; IO = -5.2 mA; VCC = 6.0 V; Tamb -40 °C to +125 °C | 7 | ||
| LOW-level output voltage | VOL | 0.1 | V | VI = VIH or VIL; IO = 20 μA; VCC = 2.0 V; Tamb -40 °C to +125 °C | 7 | ||
| LOW-level output voltage | VOL | 0.4 | V | VI = VIH or VIL; IO = 4 mA; VCC = 4.5 V; Tamb -40 °C to +125 °C | 7 | ||
| Input leakage current | II | -1 | 1 | μA | VI = VCC or GND; VCC = 6.0 V; Tamb -40 °C to +125 °C | 7 | |
| Supply current | ICC | 160 | μA | VI = VCC or GND; IO = 0 A; VCC = 6.0 V; Tamb -40 °C to +125 °C | 7 | ||
| Propagation delay nRD, nA, nB to nQ or nQ | tpd | 385 | ns | CEXT = 0 pF; REXT = 5 kΩ; see Fig. 7; VCC = 2.0 V; Tamb -40 °C to +125 °C | 8 | ||
| Propagation delay nRD, nA, nB to nQ or nQ | tpd | 77 | ns | CEXT = 0 pF; REXT = 5 kΩ; see Fig. 7; VCC = 4.5 V; Tamb -40 °C to +125 °C | 8 | ||
| Propagation delay nRD, nA, nB to nQ or nQ | tpd | 65 | ns | CEXT = 0 pF; REXT = 5 kΩ; see Fig. 7; VCC = 6.0 V; Tamb -40 °C to +125 °C | 8 | ||
| Propagation delay nRD (reset) to nQ or nQ | tpd | 325 | ns | CEXT = 0 pF; REXT = 5 kΩ; see Fig. 7; VCC = 2.0 V; Tamb -40 °C to +125 °C | 8 | ||
| Propagation delay nRD (reset) to nQ or nQ | tpd | 65 | ns | CEXT = 0 pF; REXT = 5 kΩ; see Fig. 7; VCC = 4.5 V; Tamb -40 °C to +125 °C | 8 | ||
| Propagation delay nRD (reset) to nQ or nQ | tpd | 55 | ns | CEXT = 0 pF; REXT = 5 kΩ; see Fig. 7; VCC = 6.0 V; Tamb -40 °C to +125 °C | 8 | ||
| Transition time | tt | 110 | ns | see Fig. 7; VCC = 2.0 V; Tamb -40 °C to +125 °C | 8 | ||
| Transition time | tt | 22 | ns | see Fig. 7; VCC = 4.5 V; Tamb -40 °C to +125 °C | 8 | ||
| Transition time | tt | 19 | ns | see Fig. 7; VCC = 6.0 V; Tamb -40 °C to +125 °C | 8 | ||
| Pulse width, nA LOW (input) | 150 | ns | nA LOW; see Fig. 8; VCC = 2.0 V; Tamb -40 °C to +125 °C | 8 | |||
| Pulse width, nA LOW (input) | 30 | ns | nA LOW; see Fig. 8; VCC = 4.5 V; Tamb -40 °C to +125 °C | 8 | |||
| Pulse width, nA LOW (input) | 26 | ns | nA LOW; see Fig. 8; VCC = 6.0 V; Tamb -40 °C to +125 °C | 8 | |||
| Pulse width, nB HIGH (input) | 150 | ns | nB HIGH; see Fig. 8; VCC = 2.0 V; Tamb -40 °C to +125 °C | 8 | |||
| Pulse width, nB HIGH (input) | 30 | ns | nB HIGH; see Fig. 8; VCC = 4.5 V; Tamb -40 °C to +125 °C | 8 | |||
| Pulse width, nB HIGH (input) | 26 | ns | nB HIGH; see Fig. 8; VCC = 6.0 V; Tamb -40 °C to +125 °C | 8 | |||
| Pulse width, nRD LOW (input) | 150 | ns | nRD LOW; see Fig. 9; VCC = 2.0 V; Tamb -40 °C to +125 °C | 8 | |||
| Pulse width, nRD LOW (input) | 30 | ns | nRD LOW; see Fig. 9; VCC = 4.5 V; Tamb -40 °C to +125 °C | 8 | |||
| Pulse width, nRD LOW (input) | 26 | ns | nRD LOW; see Fig. 9; VCC = 6.0 V; Tamb -40 °C to +125 °C | 8 | |||
| External timing resistor | REXT | 10 | 1000 | kΩ | see Fig. 5; VCC = 2.0 V; Tamb 25 °C column | 9 | |
| External timing resistor | REXT | 2 | 1000 | kΩ | see Fig. 5; VCC = 5.0 V; Tamb 25 °C column | 9 | |
| Input capacitance | CI | 3.5 | pF | 7 | |||
| Power dissipation capacitance | CPD | 54 | pF | per monostable; VI = GND to VCC | 9 |
CAD (KiCad official)
- Symbol:
74HC123PW - Footprint:
Package_SO:TSSOP-16_4.4x5mm_P0.65mm - 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files:
74hc123pw-etched.step/74hc123pw-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);74hc123pw.step/74hc123pw.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (20 pp, sha256
0b5ba7a32cf4830a, retrieved 2026-11-13, tier: lcsc) - 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).