component
SN74LS123N
Public Made by Adomby adom
lingxingic Monostable Multivibrators, DIP-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
markdownSN74LS123N
lingxingic · Monostable Multivibrators · DIP-16
SN74LS123N from lingxingic, in a DIP-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 | Falling-edge-triggered input 1 (active-low transition trigger, shown as 1A-bar); the datasheet describes triggering on a high-to-low transition of this input. |
| 2 | 1B | input | Rising-edge-triggered input 1; the datasheet describes triggering on a low-to-high transition of this input. |
| 3 | 1RD | input | Direct reset input 1 (shown as 1RD-bar), low-level and rising-edge active; a low level on this pin terminates the output pulse directly. |
| 4 | 1Q | output | Low-level output 1 (complementary output, shown as 1Q-bar), which is the inverse of 1Q. |
| 5 | 2Q | output | High-level output 2, which goes HIGH during the programmed output pulse. |
| 6 | 2CEXT | passive | External timing capacitor connection for monostable 2; the datasheet recommends grounding this pin to GND (pin 8) to minimize noise. |
| 7 | 2REXT/CEXT | passive | External timing resistor and capacitor connection for monostable 2 (Rext/Cext node), which together with pin 6 sets the output pulse width. |
| 8 | GND | power_in | Ground (0 V) reference for the device. |
| 9 | 2A | input | Falling-edge-triggered input 2 (shown as 2A-bar); the datasheet describes triggering on a high-to-low transition of this input. |
| 10 | 2B | input | Rising-edge-triggered input 2; the datasheet describes triggering on a low-to-high transition of this input. |
| 11 | 2RD | input | Direct reset input 2 (shown as 2RD-bar), low-level and rising-edge active; a low level on this pin terminates the output pulse directly. |
| 12 | 2Q | output | Low-level output 2 (complementary output, shown as 2Q-bar), which is the inverse of 2Q. |
| 13 | 1Q | output | High-level output 1, which goes HIGH during the programmed output pulse. |
| 14 | 1CEXT | passive | External timing capacitor connection for monostable 1; the datasheet recommends grounding this pin to GND (pin 8) to minimize noise. |
| 15 | 1REXT/CEXT | passive | External timing resistor and capacitor connection for monostable 1 (Rext/Cext node), which together with pin 14 sets the output pulse width. |
| 16 | VCC | power_in | Supply voltage; recommended operating range is 2.0 V to 6.0 V, with an absolute maximum of 7.0 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | lingxingic |
| Package | DIP-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 |
|---|---|---|---|---|---|---|---|
| 输入钳位电流 | IIK | -20 | 20 | mA | VI<-0.5V 或 VI>VCC+0.5V | 9 | |
| 输出钳位电流 | IOK | -20 | 20 | mA | VO<-0.5V 或 VO>VCC+0.5V | 9 | |
| 输出电流 | IO | -25 | 25 | mA | nREXT/CEXT 除外；VO=-0.5V～（VCC+0.5V） | 9 | |
| 电源电流 | ICC | 50 | mA | 9 | |||
| 地电流 | IGND | -50 | mA | 9 | |||
| 贮存温度 | Tstg | -65 | 150 | ℃ | 9 | ||
| 总功耗 | Ptot | 500 | mW | 9 | |||
| 焊接温度（DIP） | TL | 245 | ℃ | 10秒 | 9 | ||
| 电源电压 | VCC | 2 | 5 | 6 | V | 10 | |
| 输入电压 | VI | 0 | V | 10 | |||
| 输出电压 | VO | 0 | V | 10 | |||
| 高电平输入电压 | VIH | 1.5 | 1.2 | V | Tamb=25℃; VCC=2.0V | 10 | |
| 高电平输入电压 | VIH | 3.15 | 2.4 | V | Tamb=25℃; VCC=4.5V | 10 | |
| 高电平输入电压 | VIH | 4.2 | 3.2 | V | Tamb=25℃; VCC=6.0V | 10 | |
| 低电平输入电压 | VIL | 0.8 | 0.5 | V | Tamb=25℃; VCC=2.0V | 10 | |
| 低电平输入电压 | VIL | 2.1 | 1.35 | V | Tamb=25℃; VCC=4.5V | 10 | |
| 低电平输入电压 | VIL | 2.8 | 1.8 | V | Tamb=25℃; VCC=6.0V | 10 | |
| 高电平输出电压 | VOH | 1.9 | 2 | V | Tamb=25℃; VI=VIH或VIL；IO=-20uA；VCC=2.0V | 10 | |
| 高电平输出电压 | VOH | 4.4 | 4.5 | V | Tamb=25℃; VI=VIH或VIL；IO=-20uA；VCC=4.5V | 10 | |
| 高电平输出电压 | VOH | 5.9 | 6 | V | Tamb=25℃; VI=VIH或VIL；IO=-20uA；VCC=6.0V | 10 | |
| 高电平输出电压 | VOH | 3.98 | 4.32 | V | Tamb=25℃; VI=VIH或VIL；IO=-4mA；VCC=4.5V | 10 | |
| 高电平输出电压 | VOH | 5.48 | 5.81 | V | Tamb=25℃; VI=VIH或VIL；IO=-5.2mA；VCC=6.0V | 10 | |
| 低电平输出电压 | VOL | 0 | 0.1 | V | Tamb=25℃; VI=VIH或VIL；IO=20uA；VCC=2.0V | 10 | |
| 低电平输出电压 | VOL | 0.15 | 0.26 | V | Tamb=25℃; VI=VIH或VIL；IO=4mA；VCC=4.5V | 10 | |
| 低电平输出电压 | VOL | 0.16 | 0.26 | V | Tamb=25℃; VI=VIH或VIL；IO=5.2mA；VCC=6.0V | 10 | |
| 输入漏电流 | II | -1 | 1 | uA | Tamb=25℃; VI=VCC或GND；VCC=6.0V | 10 | |
| 静态电流 | ICC | 8 | uA | Tamb=25℃; VI=VCC或GND；IO=0A；VCC=6.0V | 10 | ||
| 高电平输入电压 | VIH | 1.5 | V | Tamb=-40℃～+85℃; VCC=2.0V | 11 | ||
| 高电平输入电压 | VIH | 3.15 | V | Tamb=-40℃～+85℃; VCC=4.5V | 11 | ||
| 高电平输入电压 | VIH | 4.2 | V | Tamb=-40℃～+85℃; VCC=6.0V | 11 | ||
| 低电平输入电压 | VIL | 0.5 | V | Tamb=-40℃～+85℃; VCC=2.0V | 11 | ||
| 低电平输入电压 | VIL | 1.35 | V | Tamb=-40℃～+85℃; VCC=4.5V | 11 | ||
| 低电平输入电压 | VIL | 1.8 | V | Tamb=-40℃～+85℃; VCC=6.0V | 11 | ||
| 高电平输出电压 | VOH | 1.9 | V | Tamb=-40℃～+85℃; VI=VIH或VIL；IO=-20uA；VCC=2.0V | 11 | ||
| 高电平输出电压 | VOH | 4.4 | V | Tamb=-40℃～+85℃; VI=VIH或VIL；IO=-20uA；VCC=4.5V | 11 | ||
| 高电平输出电压 | VOH | 5.9 | V | Tamb=-40℃～+85℃; VI=VIH或VIL；IO=-20uA；VCC=6.0V | 11 | ||
| 高电平输出电压 | VOH | 3.84 | V | Tamb=-40℃～+85℃; VI=VIH或VIL；IO=-4mA；VCC=4.5V | 11 | ||
| 高电平输出电压 | VOH | 5.34 | V | Tamb=-40℃～+85℃; VI=VIH或VIL；IO=-5.2mA；VCC=6.0V | 11 | ||
| 低电平输出电压 | VOL | 0.1 | V | Tamb=-40℃～+85℃; VI=VIH或VIL；IO=20uA；VCC=2.0V | 11 | ||
| 低电平输出电压 | VOL | 0.33 | V | Tamb=-40℃～+85℃; VI=VIH或VIL；IO=4mA；VCC=4.5V | 11 | ||
| 输入漏电流 | II | -1 | 1 | uA | Tamb=-40℃～+85℃; VI=VCC或GND；VCC=6.0V | 11 | |
| 静态电流 | ICC | 80 | uA | Tamb=-40℃～+85℃; VI=VCC或GND；IO=0A；VCC=6.0V | 11 | ||
| 传输延时 nRD、nA、nB到nQ或nQ | tpd | 83 | 255 | ns | Tamb=25℃; CL=50pF; CEXT=0pF; REXT=5kΩ; 见图6; VCC=2.0V | 13 | |
| 传输延时 nRD、nA、nB到nQ或nQ | tpd | 30 | 51 | ns | Tamb=25℃; CL=50pF; CEXT=0pF; REXT=5kΩ; 见图6; VCC=4.5V | 13 | |
| 传输延时 nRD、nA、nB到nQ或nQ | tpd | 24 | 43 | ns | Tamb=25℃; CL=50pF; CEXT=0pF; REXT=5kΩ; 见图6; VCC=6.0V | 13 | |
| 传输延时 nRD（reset）到nQ或nQ | tpd | 66 | 215 | ns | Tamb=25℃; CL=50pF; CEXT=0pF; REXT=5kΩ; 见图6; VCC=2.0V | 13 | |
| 传输延时 nRD（reset）到nQ或nQ | tpd | 25 | 43 | ns | Tamb=25℃; CL=50pF; CEXT=0pF; REXT=5kΩ; 见图6; VCC=4.5V | 13 | |
| 传输延时 nRD（reset）到nQ或nQ | tpd | 19 | 37 | ns | Tamb=25℃; CL=50pF; CEXT=0pF; REXT=5kΩ; 见图6; VCC=6.0V | 13 | |
| 外部定时电阻 | REXT | 10 | 1000 | kΩ | 见图7; VCC=2.0V | 13 | |
| 外部定时电阻 | REXT | 2 | 1000 | kΩ | 见图7; VCC=5.0V | 13 |
CAD (KiCad official)
- Symbol:
SN74LS123N - Footprint:
Package_DIP:DIP-16_W7.62mm - 3D model: DIP-16 (KiCad packages3D, STEP)
- 3D model files:
sn74ls123n-etched.step/sn74ls123n-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74ls123n.step/sn74ls123n.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: lingxingic datasheet (25 pp, sha256
8b991ed1360d0cf1, retrieved 2026-10-16, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).