MC1455BDR2G from onsemi, in a SOIC-8. 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	GND	power_in	Ground reference (0 V) for the device.
2	Trigger	input	Trigger input. A negative pulse below 1/3 VCC on this pin starts the timing cycle by setting the internal flip-flop and driving the Output high.
3	Output	output	Push-pull output. Swings between approximately 0 V and VCC and can source or sink up to 200 mA to drive loads directly.
4	Reset	input	Active-low reset. Pulling this pin below ~0.7 V forces the Output low and discharges the timing capacitor regardless of the trigger/threshold state. Tie to VCC when unused.
5	Control Voltage	input	Control voltage. Directly accesses the 2/3 VCC internal reference node, allowing external modulation of the timing threshold. Typically bypassed to ground with a 10 nF capacitor when not used.
6	Threshold	input	Threshold input. When the voltage on this pin rises above 2/3 VCC, the internal flip-flop is reset, driving the Output low and turning on the discharge transistor.
7	Discharge	output	Open-collector discharge output. Connects to the collector of an internal NPN transistor whose emitter is at GND; used to discharge the external timing capacitor during the reset phase of the timing cycle.
8	VCC	power_in	Positive supply voltage, 4.5 V to 16 V.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	SOIC-8
Category	RTC
Pins	8

Ordering variants

Same part, different packaging or reel option.

MC1455BDR2G
MC1455BDG
MC1455BPG
MC1455BP1G

CAD (KiCad official)

Symbol: MC1455BDR2G
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`mc1455bdr2g.step`	122 KB	You want the bare part, or you mark your own boards.
`mc1455bdr2g-etched.step`	2.3 MB	You want the part with `MC1455BDR2G` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 579 faces against 147 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 (11 pp, sha256 26fe4119fe552966, 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