ZD24C1MA-SSGMB from Zetta, in a SOP-8-150mil. 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	NC	unconnected	No internal connection. Leave floating or tie to GND.
2	A1	input	Device address input A1. Hard-wired to VCC or GND to select one of up to four devices on the same I2C bus. Internally biased low if left floating.
3	A2	input	Device address input A2. Hard-wired to VCC or GND to select one of up to four devices on the same I2C bus. Internally biased low if left floating.
4	GND	power_in	Ground reference for the device.
5	SDA	bidirectional	I2C serial data. Bi-directional, open-drain; requires an external pull-up resistor. May be wire-ORed with other open-drain devices on the bus.
6	SCL	input	I2C serial clock input. Positive edge clocks data into the device; negative edge clocks data out. Schmitt-triggered/filtered input.
7	WP	input	Write Protect. Tie to GND for normal read/write operation. Tie to VCC to enable hardware write protection of the entire 1024K array.
8	VCC	power_in	Positive supply, 1.7V to 5.5V. Provides operating power to the EEPROM.

Key specifications

Parameter	Value
Manufacturer	Zetta
Package	SOP-8-150mil
Category	Memory
Pins	8

Ordering variants

Same part, different packaging or reel option.

ZD24C1MA-SSGMB

CAD (KiCad official)

Symbol: ZD24C1MA-SSGMB
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8-150mil (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`zd24c1ma-ssgmb.step`	122 KB	You want the bare part, or you mark your own boards.
`zd24c1ma-ssgmb-etched.step`	2.6 MB	You want the part with `ZD24C1MA-SSGMB` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 642 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: Zetta datasheet (20 pp, sha256 1de451522d74afc7, 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