MC74HC4040ADTR2G from onsemi, in a TSSOP-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	Q12	output	Active-high counter output, divides Clock by 2^12 (4096). Push-pull CMOS output; drives up to 10 LSTTL loads at V_CC = 4.5 V.
2	Q6	output	Active-high counter output, divides Clock by 2^6 (64). Push-pull CMOS output.
3	Q5	output	Active-high counter output, divides Clock by 2^5 (32). Push-pull CMOS output.
4	Q7	output	Active-high counter output, divides Clock by 2^7 (128). Push-pull CMOS output.
5	Q4	output	Active-high counter output, divides Clock by 2^4 (16). Push-pull CMOS output.
6	Q3	output	Active-high counter output, divides Clock by 2^3 (8). Push-pull CMOS output.
7	Q2	output	Active-high counter output, divides Clock by 2^2 (4). Push-pull CMOS output.
8	GND	power_in	Ground / 0 V reference for the device. Connect to system ground with a local decoupling capacitor between V_CC (pin 16) and GND.
9	Q1	output	Active-high counter output, divides Clock by 2^1 (2). Push-pull CMOS output; typ. propagation delay Clock→Q1 is 31 ns at V_CC = 4.5 V, C_L = 50 pF.
10	Clock	input	Negative-edge-triggered clock input; a high-to-low transition advances the counter one state. V_IH ≥ 3.15 V and V_IL ≤ 1.35 V at V_CC = 4.5 V; f_max = 30 MHz typ at V_CC = 4.5 V.
11	Reset	input	Active-high asynchronous reset. A logic high on this pin immediately forces all Q outputs low, regardless of Clock. Must be held low for normal counting.
12	Q9	output	Active-high counter output, divides Clock by 2^9 (512). Push-pull CMOS output.
13	Q8	output	Active-high counter output, divides Clock by 2^8 (256). Push-pull CMOS output.
14	Q10	output	Active-high counter output, divides Clock by 2^10 (1024). Push-pull CMOS output.
15	Q11	output	Active-high counter output, divides Clock by 2^11 (2048). Push-pull CMOS output.
16	VCC	power_in	Positive supply, 2.0 V to 6.0 V (absolute max 7.0 V). Bypass locally to GND (pin 8) with a 0.1 µF ceramic capacitor.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	TSSOP-16
Category	Logic
Pins	16

Ordering variants

Same part, different packaging or reel option.

MC74HC4040ADTR2G
MC74HC4040ADTR2GDG
MC74HC4040ADTR2GDR2G

CAD (KiCad official)

Symbol: MC74HC4040ADTR2G
Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
3D model: TSSOP-16 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`mc74hc4040adtr2g.step`	205 KB	You want the bare part, or you mark your own boards.
`mc74hc4040adtr2g-etched.step`	3.2 MB	You want the part with `MC74HC4040ADTR2G` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 799 faces against 255 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: onsemi datasheet (8 pp, sha256 50a2c7e682995a1f, 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