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SN74LS123N

Public Made by Adom

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lingxingic Monostable Multivibrators, DIP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SN74LS123N

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74ls123n.step / sn74ls123n.glb are 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, 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