MBI5124GP-B from MBI, in a SSOP-24. 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 terminal for control logic and current sink. Handles up to 480mA of return current for all 16 output channels combined.
2	SDI	input	Serial data input to the 16-bit shift register. Schmitt-trigger CMOS input; VIH >= 0.7*VDD. Data is shifted on the rising edge of CLK.
3	CLK	input	Clock input for shifting data into the register on rising edge. Schmitt-trigger CMOS input; supports up to 25MHz clock frequency.
4	LE	input	Data strobe (latch enable) input. Serial data is transferred to the output latch while LE is high and latched when LE goes low. Internal pull-down (typ. 350 kOhm).
5	OUT0	output	Constant-current LED output channel 0 (active-low, open-drain current sink). Sinks 1-25mA @ VDD=5V (1-10mA @ VDD=3.3V) set by R-EXT; sustaining voltage up to VDD+0.3V (17V max at OUT port).
6	OUT1	output	Constant-current LED output channel 1 (active-low, open-drain current sink). Sinks 1-25mA @ VDD=5V programmed by R-EXT.
7	OUT2	output	Constant-current LED output channel 2 (active-low, open-drain current sink).
8	OUT3	output	Constant-current LED output channel 3 (active-low, open-drain current sink).
9	OUT4	output	Constant-current LED output channel 4 (active-low, open-drain current sink).
10	OUT5	output	Constant-current LED output channel 5 (active-low, open-drain current sink).
11	OUT6	output	Constant-current LED output channel 6 (active-low, open-drain current sink).
12	OUT7	output	Constant-current LED output channel 7 (active-low, open-drain current sink).
13	OUT8	output	Constant-current LED output channel 8 (active-low, open-drain current sink).
14	OUT9	output	Constant-current LED output channel 9 (active-low, open-drain current sink).
15	OUT10	output	Constant-current LED output channel 10 (active-low, open-drain current sink).
16	OUT11	output	Constant-current LED output channel 11 (active-low, open-drain current sink).
17	OUT12	output	Constant-current LED output channel 12 (active-low, open-drain current sink).
18	OUT13	output	Constant-current LED output channel 13 (active-low, open-drain current sink).
19	OUT14	output	Constant-current LED output channel 14 (active-low, open-drain current sink).
20	OUT15	output	Constant-current LED output channel 15 (active-low, open-drain current sink).
21	OE	input	Active-low output enable. When OE is low the output drivers are enabled; when high, all outputs are turned off (blanked). Internal pull-up (typ. 350 kOhm) to VDD; min pulse width 50ns @ VDD=5V.
22	SDO	output	Serial data output to the SDI of the next driver IC in the daisy chain. Changes on rising edge of CLK. Push-pull CMOS output; IOH/IOL = 1.0mA typical.
23	R-EXT	passive	External resistor connection used to program the output current for all 16 channels. Typical values: R_ext=1820 Ohm for ~10.7mA @ 5V; R_ext=720 Ohm for ~25.8mA @ 3.3V. Tie through resistor to GND.
24	VDD	power_in	3.3V or 5V supply voltage terminal (absolute max 7.0V). Bypass locally to GND.

Key specifications

Parameter	Value
Manufacturer	MBI
Package	SSOP-24
Category	LED-drv
Pins	24

Ordering variants

Same part, different packaging or reel option.

MBI5124GP-B
MBI5124GP-BGF
MBI5124GP-BGM
MBI5124GP-BGFN

CAD (KiCad official)

Symbol: MBI5124GP-B
Footprint: Package_SO:SSOP-24_5.3x8.2mm_P0.65mm
3D model: SSOP-24 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`mbi5124gp-b.step`	315 KB	You want the bare part, or you mark your own boards.
`mbi5124gp-b-etched.step`	2.9 MB	You want the part with `MBI5124GP-B` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 748 faces against 387 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: MBI datasheet (23 pp, sha256 0647b126ba039e32, retrieved 2026-08-17, tier: lcsc)
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