CD74HC123M96 from Texas Instruments, in a SOIC-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	1A	input	Channel 1 active-low trigger input (A-bar). Schmitt-trigger input; a high-to-low transition triggers a new output pulse on Q1 when B1 is high and 1R is high. Tie high if channel 1 is triggered via B1 only; do not leave floating.
2	1B	input	Channel 1 active-high trigger input B. Schmitt-trigger input; a low-to-high transition triggers a new output pulse when 1A is low and 1R is high. Tie low if unused.
3	1R	input	Channel 1 active-low reset (R-bar). Driving low forces 1Q low and 1Q-bar high, terminating any output pulse in progress. Tie high for normal (non-reset) operation.
4	1Q	output	Channel 1 inverted (Q-bar) buffered output. High in the idle state and pulses low for the programmed pulse width when the channel is triggered. Standard fan-out 10 LSTTL, bus-driver fan-out 15 LSTTL.
5	2Q	output	Channel 2 non-inverted Q buffered output. Low in the idle state and pulses high for the programmed pulse width when the channel is triggered.
6	2Cx	passive	Channel 2 external timing capacitor connection. Connect C_X between 2Cx (pin 6) and 2RxCx (pin 7). Minimum C_X is 0 pF; C_X sets pulse width together with R_X (t_W = 0.45 * R_X * C_X at 5 V).
7	2RxCx	passive	Channel 2 external R_X/C_X node. R_X is connected from this pin to V_CC and C_X is connected from this pin to 2Cx (pin 6). Minimum R_X is typically 5 kΩ.
8	GND	power_in	Ground / 0 V reference for both channels.
9	2A	input	Channel 2 active-low trigger input (A-bar). Schmitt-trigger input; a high-to-low transition triggers a new output pulse on Q2 when B2 is high and 2R is high. Tie high if channel 2 is triggered via B2 only.
10	2B	input	Channel 2 active-high trigger input B. Schmitt-trigger input; a low-to-high transition triggers a new output pulse when 2A is low and 2R is high. Tie low if unused.
11	2R	input	Channel 2 active-low reset (R-bar). Driving low forces 2Q low and 2Q-bar high, terminating any output pulse in progress. Tie high for normal (non-reset) operation.
12	2Q	output	Channel 2 inverted (Q-bar) buffered output. High in the idle state and pulses low for the programmed pulse width when the channel is triggered.
13	1Q	output	Channel 1 non-inverted Q buffered output. Low in the idle state and pulses high for the programmed pulse width when the channel is triggered.
14	1Cx	passive	Channel 1 external timing capacitor connection. Connect C_X between 1Cx (pin 14) and 1RxCx (pin 15). Minimum C_X is 0 pF.
15	1RxCx	passive	Channel 1 external R_X/C_X node. R_X is connected from this pin to V_CC and C_X is connected from this pin to 1Cx (pin 14). Minimum R_X is typically 5 kΩ.
16	VCC	power_in	Positive supply. HC types operate 2 V-6 V (HCT types 4.5 V-5.5 V). Absolute maximum V_CC is 7 V; bypass locally with a 0.1 µF capacitor to GND.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-16
Category	Logic
Pins	16

Ordering variants

Same part, different packaging or reel option.

CD74HC123M96
CD74HC123M96M
CD74HC123M96MT
CD74HC123M96E
CD74HC123M96NSR
CD74HC123M96PW
CD74HC123M96PWR
CD74HC123M96PWT
CD74HC123M96F3A

CAD (KiCad official)

Symbol: CD74HC123M96
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOIC-16 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`cd74hc123m96.step`	217 KB	You want the bare part, or you mark your own boards.
`cd74hc123m96-etched.step`	2.8 MB	You want the part with `CD74HC123M96` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 689 faces against 267 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Texas Instruments datasheet (22 pp, sha256 f30f05d5554e0b7c, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF